A rail transit air conditioning return air valve blade and return air assembly

Abstract

The present application discloses a rail transit air conditioning return air valve blade and return air assembly, wherein an axial cavity is provided at the center of the blade in the thickness direction, the axial cavity extends along the length direction of the blade, and is used to connect a pin shaft for fixing, and symmetrically distributed outer cavities are also provided on both sides of the axial cavity, the outer cavity and the axial cavity are arranged at intervals, and extend in the extension direction of the axial cavity. The problem of shaking due to insufficient rigidity at different attack angles of the airflow is eliminated, abnormal noise caused by shaking is eliminated, and the hollow outer cavity structure does not increase too much overall mass.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning return air valve blades, and in particular to a rail transit air-conditioning return air valve blade and a return air assembly. Background Art

[0002] The function of the return air valve blades of urban rail transit air conditioning is to adjust different air volumes of air conditioning. The currently designed return air valve blade length is between 700mm and 900mm. Excessively long return air valve blades lead to insufficient rigidity, but in actual needs, blades with a length of more than 800mm will vibrate and produce abnormal noises under different airflow attack angles, while blades with a length of 700mm will not vibrate.

[0003] Therefore, there is still a need for a rail transit air conditioning return air valve blade and return air assembly, so that the stiffness of the air conditioning return air valve blade with a length of 900 mm reaches the stiffness of the blade with a length of 700 mm, so as to solve the above problems. Utility Model Content

[0004] The present application provides a rail transit air conditioning return air valve blade and return air assembly for solving the above-mentioned problems.

[0005] The purpose of this application is achieved by the following technical solutions:

[0006] A rail transit air conditioning return valve blade, wherein an axial cavity is arranged at the center in the thickness direction of the blade, the axial cavity extends along the length direction of the blade and is used to connect a pin shaft for fixing, and symmetrically distributed outer cavities are also arranged on both sides of the axial hole, the outer cavity and the axial hole are arranged at intervals and extend corresponding to the extension direction of the axial cavity.

[0007] In one embodiment, the wall thickness of the outer cavity is 2 mm, and the cross-sectional shape of the outer cavity is trapezoidal.

[0008] In one embodiment, the top angle of the trapezoid is rounded by 3 mm, and the rounded angle of the junction between the outer cavity and the blade is 5 mm.

[0009] In one embodiment, the blade is included;

[0010] An air valve outer frame, wherein the air valve outer frame is provided with a mounting position for installing a blade, and a connecting hole is provided on the frame of the air valve outer frame;

[0011] A rotating shaft, one end of which is inserted into the shaft cavity of the blade, and the shaft of the rotating shaft and the shaft cavity are fixed by bolts;

[0012] A shaft sleeve is rotatably connected in the connecting hole, and the other end of the rotating shaft is connected to the shaft sleeve.

[0013] In one embodiment, the connection between the corresponding bolts in the shaft cavity is also filled with a filler.

[0014] In one embodiment, a connecting rod is further included, wherein the connecting rod is connected to the shaft sleeve and is used to drive the shaft sleeve to rotate in the connecting hole to adjust the angle of the blade.

[0015] Compared with the prior art, the beneficial effects of this application include at least:

[0016] External cavities are arranged on both sides of the axial cavity on the blade, extending along the length direction of the blade and spaced apart from the axial cavity. The stiffness of the blade at a length of 900 mm reaches that of the traditional blade at a length of 700 mm, which can solve the problem of shaking due to insufficient rigidity at different attack angles of the airflow and eliminate abnormal noise caused by shaking. In addition, the hollow external cavity structure will not increase the overall mass too much. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic cross-sectional view of a blade in an embodiment of the present application;

[0018] Figure 2 It is a simulation rendering of the blade and single cavity blade of the embodiment of the present application;

[0019] Figure 3 is a schematic diagram of the structure of the return air assembly in an embodiment of the present application;

[0020] Figure 4 yes Figure 3 A local enlarged view of point A;

[0021] Figure 5 It is a schematic diagram of the connection state of the shaft sleeve and the air valve outer frame of an embodiment of the present application.

[0022] In the figure: 1, blade; 11, shaft cavity; 12, outer cavity; 2, air valve outer frame; 3, rotating shaft; 4, bolt; 5, shaft sleeve; 6, connecting rod. DETAILED DESCRIPTION

[0023] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0024] The words expressing position and direction described in this application are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all changes are included in the scope of protection of this application.

[0025] Reference Figure 1-5The present application provides a rail transit air conditioning return air valve blade 1, wherein an axial cavity 11 is provided at the center of the thickness direction of the blade 1, and the axial cavity 11 extends along the length direction of the blade 1, and is used to connect a pin shaft for fixing. The two sides of the axial hole are also provided with symmetrically distributed external cavities 12, and the external cavities 12 and the axial hole are arranged at intervals and extend in the extension direction of the axial cavity 11. An axial cavity 11 is provided at the middle position of the thickness of the blade 1, and the cross-section of the axial cavity 11 in the blade 1 is uniform. The cross-sectional shape of the external cavities 12 located on both sides of the axial cavity 11 in the length direction of the blade 1 is unique and uniform, which increases the rigidity of both sides of the blade 1. When the length of the blade 1 reaches 900mm, the rigidity of the blade 1 at this time can reach the rigidity of the single-cavity structure blade 1 of 700mm. The above-mentioned blade 1 is installed at a designated air outlet, and the problem of shaking due to insufficient rigidity at different attack angles of the airflow is avoided, and abnormal noise caused by shaking is avoided.

[0026] In one embodiment, the wall thickness of the outer cavity 12 is 2 mm, and the cross-sectional shape of the outer cavity 12 is a trapezoid. According to tests, when the length of the blade 1 is 900 mm, the wall thickness of the outer cavity 12 is 2 mm, and the cross-sectional shape of the outer cavity 12 is preferably a trapezoid, the rigidity of the blade 1 at this time can reach the expected strength, and the rigidity will not decrease as the length of the blade 1 increases, which will eventually cause the blade 1 to vibrate and make abnormal noises under the propulsion of the airflow.

[0027] In a specific embodiment, the top angle of the trapezoid is a 3mm fillet, and the fillet of the joint of the outer cavity 12 and the blade 1 is 5mm. When the chamfer of the joint of the outer cavity 12 and the outer side of the blade 1 is 5mm, the blocking effect of the joint on the airflow can be reduced to the greatest extent, and the arc-shaped chamfer allows the airflow passing through the surface of the blade 1 to flow away smoothly, reducing the blocking effect of the outer cavity 12 and the external connection of the blade 1.

[0028] The utility model also provides an air return assembly, comprising the blade 1 described in any one of the above items;

[0029] The air valve outer frame 2 is provided with an installation position for installing the blade 1, and the border of the air valve outer frame 2 is provided with a connecting hole; the air valve outer frame 2 is provided with 3, 5, and 7 installation positions, and the multiple installation positions are evenly distributed in the height direction of the border of the air valve outer frame 2.

[0030] The rotating shaft 3 has one end inserted into the shaft cavity 11 of the blade 1, and the shaft of the rotating shaft 3 and the shaft cavity 11 are fixed by bolts 4. The rotating shaft 3 is sleeved inside the shaft cavity 11 and fixed inside the bolts 4 by bolts 4 radially inserted into the rotating shaft 3, and a part of the rotating shaft 3 extends out of the shaft cavity 11 for connecting other components.

[0031] The shaft sleeve 5 is rotatably connected in the connecting hole, and the other end of the rotating shaft is connected to the shaft sleeve. The return air assembly using the return air blade 1 can be used to adjust the return air outlet blade 1 to a longer length of 900 mm due to the external cavities 12 provided on both sides of the blade 1, and the gas flow can be guided without shaking and generating abnormal sounds or noises.

[0032] In another embodiment, the connection portion of the shaft cavity 11 corresponding to the bolt 4 is further filled with a filler. The filler is, for example, a fastener, which serves to increase the bonding force between the bolt 4 and the rotating shaft 3.

[0033] In one embodiment, a connecting rod 6 is further included, and the connecting rod 6 is connected to the shaft sleeve 5, and is used to drive the shaft sleeve 5 to rotate in the connecting hole to adjust the angle of the blade 1. The connecting rod 6 is, for example, a rod connected to the shaft sleeve 5 from the outside. When adjusting, the connecting rod 6 adjusts the angle of the blade 1 connected to the rotating shaft sleeve 3 by rotating the angle of the shaft sleeve 3.

[0034] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the application without departing from the principles and purpose of the present application. All of these changes should fall within the scope of protection of the claims of the present application.

Claims

1. A rail transit air conditioning return air valve blade, characterized in that: An axial cavity is arranged at the center of the blade in the thickness direction, and the axial cavity extends along the length direction of the blade and is used to connect the pin shaft for fixing. There are also symmetrically distributed outer cavities on both sides of the axial cavity, and the outer cavity and the axial cavity are spaced apart and extend corresponding to the extension direction of the axial cavity.

2. The blade according to claim 1, characterized in that The wall thickness of the outer cavity is 2 mm, and the cross-sectional shape of the outer cavity is a trapezoid.

3. The blade according to claim 2, characterized in that The top angle of the trapezoid is a 3mm fillet, and the fillet at the junction of the outer cavity and the blade is 5mm.

4. A return air assembly, characterized in that: A blade comprising any one of claims 1 to 3; An air valve outer frame, wherein the air valve outer frame is provided with a mounting position for installing a blade, and a connecting hole is provided on the frame of the air valve outer frame; A rotating shaft, one end of which is inserted into the shaft cavity of the blade, and the shaft of the rotating shaft and the shaft cavity are fixed by bolts; A shaft sleeve is rotatably connected in the connecting hole, and the other end of the rotating shaft is connected to the shaft sleeve.

5. The air return assembly according to claim 4, characterized in that: The connection position corresponding to the bolt in the shaft cavity is also filled with a filler.

6. The air return assembly according to claim 4, characterized in that: It also includes a connecting rod, which is connected to the shaft sleeve and is used to drive the shaft sleeve to rotate in the connecting hole to adjust the angle of the blade.

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