Pressure wave protection valve

Abstract

The utility model provides a pressure wave protection valve which comprises a bottom plate, and an air opening is formed in the bottom plate. Supporting plates are arranged on the left side and the right side of the bottom plate correspondingly. A rotating shaft is connected between the two supporting plates; wherein one end of the rotating shaft is connected with the actuator; the bottom plate is connected with blades through a rotating assembly; when the blades rotate, the air opening can be closed; connecting plates are arranged on the blades; the connecting plate and the rotating shaft are connected through a rotary matching assembly; the rotary matching assembly comprises a shaft lever crank throw fixed on the rotating shaft and a movable plate connecting seat fixed on the connecting plate; each movable plate connecting seat is rotationally connected with one end of a movable rod through a first pin shaft; and the other end of the movable rod is connected with the shaft lever crank throw through a second pin shaft. By adopting the hinge type, the size of the opening is increased, the wind resistance is reduced, the strength is enhanced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to a train fresh air system, in particular to a pressure wave protection valve. Background Art

[0002] When the pressure inside and outside the train changes too much during its running, it is necessary to close the fresh air inlet and the exhaust outlet of the exhaust device through a pressure wave protection valve to prevent the pressure fluctuation outside the train from entering the train. However, the opening angle of the existing pressure wave air valve is limited, and the shaft rod leads to a cotter pin, which increases the wind resistance. At the same time, the structural stability is poor, and the support plate used to install the rotating shaft is made of sheet metal bending, which has low strength. Summary of the invention

[0003] In order to solve the above problems, the present invention discloses a pressure wave protection valve, which adopts a hinge type, increases the opening size and reduces wind resistance, while enhancing the strength and extending the service life.

[0004] The pressure wave protection valve comprises a base plate, on which an air outlet is arranged; support plates are respectively arranged on the left and right sides of the base plate; a rotating shaft is connected between the two support plates; one end of the rotating shaft is connected to the actuator; the base plate is connected to a blade through a rotating component; the air outlet can be closed when the blade rotates; a connecting plate is provided on the blade; the connecting plate and the rotating shaft are connected through a rotating matching component; the rotating matching component comprises a shaft crank fixed on the rotating shaft and a movable plate connecting seat fixed on the connecting plate; each movable plate connecting seat is rotatably connected to one end of a movable rod through a first pin shaft; the other end of the movable rod is connected to the shaft crank through a second pin shaft.

[0005] Furthermore, the edges of the air outlets are provided with rubber strips to ensure sealing.

[0006] Furthermore, the maximum opening angle of the blades is 36.4°+2°.

[0007] Furthermore, one end of the rotating shaft connected to the actuator is sleeved with a shaft sleeve to improve the structural strength of the rotating shaft.

[0008] Furthermore, the support plate is made of an aluminum plate in one piece, which is easy to process and increases the stability and strength of the overall structure.

[0009] Furthermore, the shaft crank is connected and fixed to the rotating shaft by an A-type key pin, which is easy to install.

[0010] The pressure wave protection valve of the utility model rotates through the rotating component; the actuator is used to drive the rotating shaft to rotate, thereby driving the rotation of the blades. The rotation angle of the blades is achieved by rotating the matching component. A hinge type is adopted, and the two ends of the movable rod are respectively connected to the movable plate connecting seat and the shaft rod crank rotation to increase the opening angle.

[0011] The beneficial effects of the utility model: the hinge type is adopted, the opening size is increased, the wind resistance is reduced, the strength is enhanced, and the service life is extended BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 , a schematic diagram of the structure of the utility model;

[0013] Figure 2 , a top view of the utility model;

[0014] Figure 3 , Figure 2 Cross-sectional view of AA in the middle;

[0015] Figure 4 , a three-dimensional diagram of the utility model;

[0016] Figure 5 , Figure 4 A partial enlarged view of B in the middle;

[0017] List of reference numerals:

[0018] Among them, 1-bottom plate; 2-air outlet; 3-support plate; 4-rotating shaft; 5-actuator; 6-blade; 7-A-type key pin; 8-connecting plate; 9-shaft crank; 10-moving plate connecting seat; 11-movable rod; 12-first pin shaft; 13-second pin shaft; 14-rubber strip; 15-sleeve; 16-rotating component; 18-active sleeve. DETAILED DESCRIPTION

[0019] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0020] like Figure 1-5 As shown, the pressure wave protection valve of this embodiment includes a base plate 1, and an air outlet 2 is provided on the base plate 1; support plates 3 are respectively provided on the left and right sides of the base plate 1; and the support plates 3 are made of an integrally formed aluminum plate.

[0021] A rotating shaft 4 is connected between the two support plates 3 ; one end of the rotating shaft 4 is connected to the actuator 5 ; and the end of the rotating shaft 4 connected to the actuator 5 is sleeved with a driving sleeve 18 and a sleeve 15 .

[0022] The bottom plate 1 is connected with a blade 6 through a rotating assembly 16; wherein the blade 6 can close the air outlet 2 when it rotates; a connecting plate 8 is provided on the blade 6; the connecting plate 8 and the rotating shaft 4 are connected through a rotating matching assembly; the rotating matching assembly includes a shaft crank 9 fixed on the rotating shaft 4 and a movable plate connecting seat 10 fixed on the connecting plate 8; wherein the shaft crank 9 is connected and fixed to the rotating shaft 4 through an A-type key pin 7; each movable plate connecting seat 10 is rotationally connected to one end of a movable rod 11 through a first pin shaft 12; the other end of the movable rod 11 is connected to the shaft crank 9 through a second pin shaft 13; the actuator is used to drive the rotating shaft to rotate, thereby driving the rotation of the blade to realize opening and closing of the air outlet; the angle of rotation of the blade is realized by the rotating matching assembly, which adopts a hinge type, and uses the two ends of the movable rod to be rotationally connected to the movable plate connecting seat and the shaft crank respectively to increase the opening angle; the opening angle of the blade is 36.4º.

[0023] The edges of the air vents 7 are all provided with rubber strips 14, and the rubber strips 14 must meet the requirements of oxygen index ≥ 30, no flow and burning drops, and meet the requirements of fire prevention, fire resistance, smoke prevention and poison prevention.

[0024] The pressure protection valve of this embodiment can be used normally in an environment with an ambient temperature of -20°C to 60°C, a temperature ≤98%, and an altitude ≤1500m; after the aluminum alloy parts are processed, the surface must be anodized and must comply with the GB / T8013.1 standard AA15 requirements that the air valve body frame, valve plate, etc. are made of 6061-T6 aluminum alloy, and the transmission mechanism, fasteners, etc. are all made of SUS304 stainless steel.

[0025] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above technical features.

Claims

1. A pressure wave protection valve, comprising a base plate (1), wherein the base plate (1) is provided with an air outlet (2); support plates (3) are provided on the left and right sides of the base plate (1); a rotating shaft (4) is connected between the two support plates (3); wherein one end of the rotating shaft (4) is connected to an actuator (5); the base plate (1) is connected to a blade (6) via a rotating component (16); wherein the blade (6) can close the air outlet (2) when it rotates; the characteristics are as follows: The blade (6) is provided with a connecting plate (8); the connecting plate (8) and the rotating shaft (4) are connected via a rotating matching assembly; the rotating matching assembly comprises a shaft crank (9) fixed on the rotating shaft (4) and a movable plate connecting seat (10) fixed on the connecting plate (8); each movable plate connecting seat (10) is rotationally connected to one end of a movable rod (11) via a first pin shaft (12); the other end of the movable rod (11) is connected to the shaft crank (9) via a second pin shaft (13).

2. The pressure wave protection valve according to claim 1, characterized in that: The edges of the air outlets (2) are all provided with rubber strips (14).

3. The pressure wave protection valve according to claim 1, characterized in that: The maximum opening angle of the blades is 36.4°+2°.

4. The pressure wave protection valve according to claim 1, characterized in that: One end of the rotating shaft (4) connected to the actuator (5) is sleeved with a shaft sleeve (15).

5. The pressure wave protection valve according to claim 1, characterized in that: The support plate (3) is made of an aluminum plate in one piece.

6. The pressure wave protection valve according to claim 1, characterized in that: The shaft crank (9) is connected and fixed to the rotating shaft (4) via an A-shaped key pin (7).

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