Blade assembly for closed air valve

Abstract

The utility model provides a blade assembly for a closed air valve, the blade assembly comprises a rotating shaft, a blade and a pressing plate, the pressing plate is fixed on the blade, a first mounting groove is formed in the middle of the blade along the direction far away from the pressing plate, a second mounting groove is formed in the middle of the pressing plate along the direction far away from the blade, and the first mounting groove and the second mounting groove form a mounting hole. The rotating shaft penetrates through the mounting hole, and the outer circumferential face of the rotating shaft is matched with the inner circumferential face of the mounting hole. According to the blade assembly for the closed air valve, the rotating shaft is clamped in the middle through the blades and the pressing plates, the rotating shaft is fixed in the mode that mounting holes formed by the blades and the pressing plates are matched with the rotating shaft, the blades, the pressing plates and the rotating shaft are matched more tightly, and the phenomenon that the blades and the rotating shaft are loosened is avoided; and the adjacent blades can be always kept sealed in a closed state, so that the blades are tighter, the air leakage is smaller, the assembly is more convenient, the production efficiency is improved, and the production cost is saved.

Description

Technical Field

[0001] The utility model relates to a blade assembly for a closed air valve. Background Art

[0002] With the improvement of the building ventilation industry standard, the sealing requirement for the closed air valve is getting higher and higher. As Figures 1 to 2 shown, for the existing blade assembly for a closed air valve, two circular shaft blades 10 wrap the circular shaft 20, and then are connected by radially penetrating bolts 30. For the blade assembly with such a structure, after a long time, the circular shaft blades 10 are prone to twist with the circular shaft 20, resulting in poor sealing effect. If such a closed air valve is used for a valve on an exhaust gas pipeline, poor sealing performance will lead to exhaust gas leakage and serious consequences such as non-compliance with environmental protection requirements. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the defect that the blades and the rotating shaft of the blade assembly for the existing closed air valve are prone to twist, resulting in poor sealing effect, and to provide a blade assembly for a closed air valve.

[0004] The utility model solves the above technical problem through the following technical solutions:

[0005] The utility model provides a blade assembly for a closed air valve, which includes a rotating shaft, blades and a pressing plate. The pressing plate is fixed on the blades. A first installation groove is formed in the middle of the blade along the direction away from the pressing plate, and a second installation groove is formed in the middle of the pressing plate along the direction away from the blade. The first installation groove and the second installation groove form an installation hole. The rotating shaft passes through the installation hole, and the outer peripheral surface of the rotating shaft is matched with the inner peripheral surface of the installation hole.

[0006] In this technical solution, the rotating shaft is clamped between the blades and the pressing plate, and the cooperation among the blades, the pressing plate and the rotating shaft is closer, and the phenomenon of looseness between the blades and the rotating shaft no longer occurs. In the closed state, the blades can always maintain a seal with adjacent blades, the blades are closer to each other, the air leakage is smaller, and the assembly is also more convenient.

[0007] Preferably, the cross section of the rotating shaft is square.

[0008] In this technical solution, the rotating shaft with a square cross section will not rotate relative to the installation hole, ensuring that the blades will not deform in the rotation angle during long-term use, and enabling the blades to always maintain a seal with adjacent blades.

[0009] Preferably, the cross section of the installation hole is square.

[0010] In this technical solution, the installation hole with a square cross-section ensures that during long-term use, the rotating shaft and the installation hole will not rotate relative to each other, and the blades can always maintain a seal between adjacent blades.

[0011] Preferably, the first installation groove and the second installation groove are symmetrically arranged.

[0012] In this technical solution, the symmetrically arranged first installation groove and second installation groove enable the first installation groove and the second installation groove to receive similar acting forces during the rotation of the blade, and the blade and the pressing plate are not easily deformed.

[0013] Preferably, the first installation groove includes a first bottom surface and a first left side surface and a first right side surface located on both sides of the first bottom surface; the second installation groove includes a second bottom surface and a second left side surface and a second right side surface located on both sides of the second bottom surface; the first left side surface and the second left side surface are joined to form a continuous surface, and the first right side surface and the second right side surface are joined to form a continuous surface.

[0014] In this technical solution, through the above structural design of the installation groove, the rotating shaft will not rotate relative to the first installation groove and the second installation groove during rotation, ensuring the stability of the relative angle between the blade and the rotating shaft.

[0015] Preferably, the pressing plate has a first fixing area and a second fixing area that fit the surface of the blade, and the first fixing area and the second fixing area are respectively located on both sides of the second installation groove.

[0016] In this technical solution, by fixing the first fixing area and the second fixing area to the blade, the pressing plate can be fixed to the blade.

[0017] Preferably, the number of the pressing plates is several, and several pressing plates are sequentially covered on the rotating shaft along the axial direction of the rotating shaft.

[0018] In this technical solution, using multiple pressing plates to fix the rotating shaft, on the one hand, multiple small-area pressing plates can better adapt to the slight deformation of the blade and the rotating shaft, and the fixing effect is better; on the other hand, the pressing plates do not need to cover the entire rotating shaft, saving the material of the pressing plates and reducing the production cost.

[0019] Preferably, the blade assembly further includes a pressure strip and a sealing strip. The pressure strip is arranged at the edge of the blade, and the pressure strip and the edge of the blade clamp one side of the sealing strip, and the other side of the sealing strip extends to the outside of the blade.

[0020] In this technical solution, by attaching a sealing strip to the edge of the blade, the overall area of the blade assembly is made larger; for a blade assembly of the same area, using a sealing strip can save at least one-third of the material of the blade itself; and the sealing strip can achieve a better sealing effect with adjacent blades.

[0021] Preferably, the pressure strip and the pressing plate are located on the same side of the blade.

[0022] In this technical solution, the pressure strip and the pressing plate are located on the same side of the blade, enabling installers or installation equipment to complete the installation of the pressure strip and the pressing plate on one side of the blade. The installation steps are simple and the production efficiency is high.

[0023] Preferably, the number of the pressure strips is two, and the two pressure strips are symmetrically distributed with the axis of the rotating shaft as the center line; and / or, the number of the sealing strips is two, and the two sealing strips are symmetrically distributed with the axis of the rotating shaft as the center line.

[0024] In this technical solution, through the symmetrically distributed pressure strips and sealing strips, the blade assembly is always in a relatively balanced state when rotating around the axis of the rotating shaft.

[0025] On the basis of conforming to the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred examples of the present invention.

[0026] The positive and progressive effects of the present invention are as follows:

[0027] For the above-mentioned blade assembly for a closed air valve, by sandwiching the rotating shaft between the blade and the pressing plate and matching the mounting hole formed by the blade and the pressing plate with the rotating shaft, the fixing of the rotating shaft is realized, making the cooperation between the blade, the pressing plate and the rotating shaft closer. The phenomenon of looseness between the blade and the rotating shaft no longer occurs. When in the closed state, the seal between the blade and adjacent blades can be always maintained, the blades are closer to each other, the air leakage is smaller, the assembly is more convenient, the production efficiency is improved, and the production cost is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. is a schematic structural view of a blade assembly for a closed air valve in the prior art.

[0029] Figure 2 is Figure 1 a schematic cross-sectional view of the blade assembly for a closed air valve shown in FIG.

[0030] Figure 3 FIG. is a schematic structural view of the blade assembly for a closed air valve of the present invention.

[0031] Figure 4 is Figure 3 a schematic cross-sectional view of the blade assembly for a closed air valve shown in FIG.

[0032] Description of the Reference Numerals

[0033] Circular Shaft Blade 10

[0034] Circular Shaft 20

[0035] Radial Through-Bolt 30

[0036] Blade 1

[0037] First Installation Groove 11

[0038] First Bottom Surface 111

[0039] First Left Side Surface 112

[0040] First Right Side Surface 113

[0041] Rotating Shaft 2

[0042] Pressing Plate 3

[0043] Second Installation Groove 31

[0044] Second Bottom Surface 311

[0045] Second Left Side Surface 312

[0046] Second Right Side Surface 313

[0047] First Fixing Area 32

[0048] Second Fixing Area 33

[0049] Installation Hole 4

[0050] Fixing Bolt 5

[0051] Pressing Strip 6

[0052] Sealing Strip 7 Detailed Implementation Manner

[0053] The present utility model will be further described below by way of embodiments, but the present utility model is not limited to the scope of the described embodiments.

[0054] Figures 3 to 4 As shown, it is an embodiment of the blade assembly for a hermetic air valve of the present utility model. The blade assembly includes a blade 1, a rotating shaft 2, and a pressing plate 3. The pressing plate 3 is fixed on the blade 1. A first installation groove 11 is formed in the middle of the blade 1 along the direction away from the pressing plate 3. A second installation groove 31 is formed in the middle of the pressing plate 3 along the direction away from the blade 1. The first installation groove 11 and the second installation groove 31 form an installation hole 4. The rotating shaft 2 passes through the installation hole 4, and the outer peripheral surface of the rotating shaft 2 is matched with the inner peripheral surface of the installation hole 4.

[0055] The rotating shaft 2 is clamped between the blade 1 and the pressing plate 3. The mounting hole 4 formed by the blade 1 and the pressing plate 3 is matched with the rotating shaft 2 to fix the rotating shaft 2, making the cooperation between the blade 1, the pressing plate 3 and the rotating shaft 2 closer. The phenomenon of looseness between the blade 1 and the rotating shaft 2 no longer occurs. In the closed state, the seal can always be maintained between the blade 1 and the adjacent blade. The blades are closer to each other, the air leakage is smaller, and the assembly is more convenient.

[0056] Among them, the cross-section of the rotating shaft 2 is square. During the rotation of the blade 1, there will be no relative rotation between the square cross-section rotating shaft 2 and the mounting hole 4, ensuring that the blade 1 will not deform in terms of the rotation angle during long-term use, and enabling the seal to always be maintained between the blade 1 and the adjacent blade. The cross-section of the mounting hole 4 is preferably square as well. The square cross-section mounting hole 4 is matched with the square cross-section rotating shaft 2, further ensuring that there will be no relative rotation between the rotating shaft 2 and the mounting hole 4 during long-term use, and enabling the seal to always be maintained between the blade 1 and the adjacent blade. Moreover, the square cross-section mounting hole 4 and the rotating shaft 2 are simple in design, convenient to process, and easier to assemble.

[0057] As Figure 4 shown, the first mounting groove 11 and the second mounting groove 31 are symmetrically arranged. The symmetrically arranged first mounting groove 11 and second mounting groove 31 enable the first mounting groove 11 and the second mounting groove 31 to receive similar acting forces during the rotation of the blade 1, and it is not easy for the blade 1 and the pressing plate 3 to deform.

[0058] As Figure 4 shown, the first mounting groove 11 includes a first bottom surface 111 and a first left side surface 112 and a first right side surface 113 located on both sides of the first bottom surface 111; the second mounting groove 31 includes a second bottom surface 311 and a second left side surface 312 and a second right side surface 313 located on both sides of the second bottom surface 311; the first left side surface 112 and the second left side surface 312 are joined to form a continuous surface, and the first right side surface 113 and the second right side surface 313 are joined to form a continuous surface.

[0059] The three surfaces of the first bottom surface 111, the first left side surface 112, and the first right side surface 113 of the first installation groove 11 are all in contact with the rotating shaft 2, enabling the rotating shaft 2 to be in full contact with the first installation groove 11; the three surfaces of the second bottom surface 311, the second left side surface 312, and the second right side surface 313 of the second installation groove 31 are also all in contact with the rotating shaft 2, enabling the rotating shaft 2 to be in full contact with the second installation groove 31. Through the above structural design of the installation groove, relative rotation between the rotating shaft 2 and the first installation groove 11 and the second installation groove 31 will not occur during the rotation of the rotating shaft 2, ensuring the stability of the relative angle between the blade 1 and the rotating shaft 2. Among them, when the cross-section of the installation hole 4 is square, the first left side surface 112 and the first right side surface 113 are perpendicular to the first bottom surface 111, and the second left side surface 312 and the second right side surface 313 are perpendicular to the second bottom surface 311.

[0060] As Figure 4 shown, the pressing plate 3 has a first fixing area 32 and a second fixing area 33 that fit the surface of the blade 1, and the first fixing area 32 and the second fixing area 33 are respectively located on both sides of the second installation groove 31. By fixing the first fixing area 32 and the second fixing area 33 to the blade 1, the pressing plate 3 can be fixed to the blade 1. The fixing of the first fixing area 32 and the second fixing area 33 to the blade 1 can be achieved through fixing bolts 5 that penetrate the blade 1 and the first fixing area 32 or the second fixing area 33.

[0061] As Figure 3 shown, in this embodiment, the number of pressing plates 3 is two, and the two pressing plates 3 are successively covered on the rotating shaft 2 along the axial direction of the rotating shaft 2. In other embodiments, the number of pressing plates 3 can also be set to multiple according to actual needs. Using multiple pressing plates 3 to fix the rotating shaft 2, on the one hand, multiple small-area pressing plates 3 can better adapt to the slight deformation of the blade 1 and the rotating shaft 2, and the fixing effect is better; on the other hand, the pressing plates 3 do not need to cover the entire rotating shaft 2, saving the material of the pressing plates 3 and reducing the production cost.

[0062] As Figure 3 and Figure 4 shown, the blade assembly further includes a bead 6 and a sealing strip 7. The bead 6 is arranged at the edge of the blade 1, and the bead 6 and the edge of the blade 1 clamp one side of the sealing strip 7, and the other side of the sealing strip 7 extends to the outside of the blade 1.

[0063] By connecting the sealing strip 7 to the edge of the blade 1, the overall area of the blade assembly is larger; for blade assemblies of the same area, using the sealing strip 7 can save at least one-third of the material of the blade 1 itself; and the sealing strip 7 can achieve a better sealing effect with adjacent blades. The sealing strip 7 can be embedded between the bead 6 and the blade 1 through the TOX crimping process.

[0064] For the convenience of installing the blade assembly, it is preferable that the bead 6 and the pressing plate 3 are located on the same side of the blade 1, so that the installer or the installation equipment can complete the installation of the bead 6 and the pressing plate 3 on one side of the blade 1. The installation steps are simple and the production efficiency is high.

[0065] Among them, the number of both the bead 6 and the sealing strip 7 is two, and the two beads 6 and the two sealing strips 7 are symmetrically distributed with the axis of the rotating shaft 2 as the center line. Through the symmetrically distributed beads 6 and sealing strips 7, the blade assembly is always in a relatively balanced state when rotating around the axis of the rotating shaft 2.

[0066] The present utility model is not limited to the above embodiments. No matter what changes are made in its shape or structure, they all fall within the protection scope of the present utility model. The protection scope of the present utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present utility model, but these changes and modifications all fall within the protection scope of the present utility model.

Claims

1. A blade assembly for a closed air valve, characterized in that: The blade assembly includes a rotating shaft, a blade and a pressure plate, wherein the pressure plate is fixed on the blade, a first mounting groove is formed in the middle of the blade along a direction away from the pressure plate, and a second mounting groove is formed in the middle of the pressure plate along a direction away from the blade, the first mounting groove and the second mounting groove constitute a mounting hole, the rotating shaft passes through the mounting hole, and the outer circumference of the rotating shaft matches the inner circumference of the mounting hole.

2. The blade assembly for a closed air valve according to claim 1, characterized in that: The cross section of the rotating shaft is square.

3. The blade assembly for a closed air valve according to claim 1 or 2, characterized in that: The cross section of the mounting hole is square.

4. The blade assembly for a closed air valve according to claim 1, characterized in that: The first mounting groove and the second mounting groove are symmetrically arranged.

5. The blade assembly for a closed air valve according to claim 1 or 4, characterized in that: The first mounting groove includes a first bottom surface and a first left side surface and a first right side surface located on both sides of the first bottom surface; the second mounting groove includes a second bottom surface and a second left side surface and a second right side surface located on both sides of the second bottom surface; the first left side surface and the second left side surface are connected to form a continuous surface, and the first right side surface and the second right side surface are connected to form a continuous surface.

6. The blade assembly for a closed air valve according to claim 1, characterized in that: The pressing plate has a first fixing area and a second fixing area which are in contact with the surface of the blade, and the first fixing area and the second fixing area are respectively located on two sides of the second mounting groove.

7. The blade assembly for a closed air valve according to claim 1, characterized in that: The number of the pressing plates is several, and the several pressing plates are sequentially covered on the rotating shaft along the axial direction of the rotating shaft.

8. The blade assembly for a closed air valve according to claim 1, characterized in that: The blade assembly further comprises a pressure strip and a sealing strip. The pressure strip is arranged at the edge of the blade. The pressure strip and the edge of the blade clamp one side of the sealing strip, and the other side of the sealing strip extends to the outside of the blade.

9. The blade assembly for a closed air valve according to claim 8, characterized in that: The pressure strip and the pressure plate are located on the same side of the blade.

10. The blade assembly for a closed air valve according to claim 8, characterized in that: The number of the pressure strips is two, and the two pressure strips are symmetrically distributed with the axis of the rotating shaft as the center line; and / or the number of the sealing strips is two, and the two sealing strips are symmetrically distributed with the axis of the rotating shaft as the center line.

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