Novel sealing structure for throttle valve

Abstract

The novel sealing structure comprises a shell, a throat pipe is integrally formed on the shell, a rotating shaft is rotatably and hermetically installed in the throat pipe in a penetrating mode, a motor used for driving the rotating shaft is installed in the shell, and an L-shaped connecting block is detachably installed on the outer wall, located in the throat pipe, of the rotating shaft. A valve plate is rotatably mounted on the L-shaped connecting block, and a spring is arranged between the L-shaped connecting block and the valve plate; when the valve is in a closed state, the valve plate is tightly attached to the inner wall of the annular groove so as to ensure the sealing performance of the throat pipe, when the valve is opened, the motor is started to drive the rotating shaft to rotate by 20 degrees, the L-shaped connecting block can be driven to rotate, at the moment, the valve plate moves to the outer side of the annular groove under the driving of the L-shaped connecting block and the action of the spring, and then the rotating shaft continues to rotate; therefore, the purpose of controlling the opening degree of the valve is achieved, the whole structure is simple, the requirement for machining precision is low, and the using effect is good.

Description

Technical Field

[0001] This utility model relates to the field of air circuit control valve technology for hydrogen energy fuel cell stacks, specifically a novel sealing structure for throttle valves. Background Technology

[0002] In hydrogen fuel cell vehicles, a throttle valve is installed on the air intake pipe of the fuel cell stack to control the amount of air entering the stack.

[0003] The working principle of the throttle valve is as follows: When energized, the drive control component controls the motor to drive the rotating shaft to rotate, thereby causing the valve plate to flip and the valve to open; when de-energized, the valve plate is driven to flip under the force of the torsion spring, and the valve to close. The valve plate of the throttle valve is fixed on the outer wall of the rotating shaft. It makes an eccentric rotational movement in the valve body, relying on the edge to form a tight fit with the inner wall of the valve body. In the closed state, it blocks the air flow. This kind of sealing is highly dependent on the precision of mechanical processing to ensure the flatness of the contact surface. The processing cost is high, and the sealing effect is easily reduced due to wear.

[0004] Therefore, we propose a novel sealing structure for the throttle valve. Utility Model Content

[0005] The purpose of this invention is to provide a novel sealing structure for throttle valves to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A novel sealing structure for a throttle valve includes a housing, on which a throttle tube is integrally formed. A rotating shaft is rotatably installed within the throttle tube. A motor for driving the rotating shaft is installed within the housing. An L-shaped connecting block is detachably installed on the outer wall of the rotating shaft within the throttle tube. A valve plate is rotatably installed on the L-shaped connecting block. A spring is provided between the L-shaped connecting block and the valve plate. A sealing ring is provided on the inner wall of the throttle tube. An annular groove adapted to the valve plate is provided in the opening of the sealing ring. The valve plate is located within the annular groove.

[0008] As a further embodiment of this utility model: a through rod is installed on the L-shaped connecting block through a limiting hole, and a pin is installed on the outer wall of the L-shaped connecting block at the corresponding position of the limiting hole. The through rod is movably sleeved on the pin, one end of the through rod is fixedly connected to the valve plate, and the through rod can swing around the pin within the limiting hole.

[0009] As a further embodiment of this utility model: the outer walls of the L-shaped connecting block and the valve plate are each fixedly provided with positioning posts at the corresponding positions of the springs, and the two ends of the springs are sleeved on the corresponding positioning posts.

[0010] As a further embodiment of this utility model: a half gear is fixedly sleeved at one end of the rotating shaft located inside the housing, and a drive gear is fixedly installed on the output shaft of the motor, and the drive gear and the half gear mesh with each other.

[0011] As a further embodiment of this utility model: an arc-shaped limiting groove is provided on the half gear, and a limiting block is slidably installed in the arc-shaped limiting groove, and the limiting block is fixedly installed in the housing.

[0012] As a further improvement of this utility model, a controller is installed on the housing.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] In this invention, when the valve is closed, the valve plate will be tightly against the inner wall of the annular groove to ensure the sealing of the throat. When the valve is opened, the motor drives the rotating shaft to rotate 20°, which can drive the L-shaped connecting block to rotate. At this time, the valve plate will move to the outside of the annular groove under the action of the L-shaped connecting block and the spring. Then the rotating shaft continues to rotate, which can drive the valve plate to rotate inside the throat to achieve the purpose of controlling the valve opening. The overall structure is simple, the processing precision requirement is low, and the use effect is good. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a novel sealing structure for throttle valves.

[0016] Figure 2 This is one of the cross-sectional views of a novel sealing structure for throttle valves.

[0017] Figure 3 This is a second cross-sectional view of a novel sealing structure for a throttle valve.

[0018] Figure 4 This is a schematic diagram of the sealing ring in a novel sealing structure for throttle valves.

[0019] Figure 5 This is a schematic diagram of the L-shaped connecting block in a novel sealing structure for throttle valves.

[0020] Figure 6 This is a schematic diagram of the valve plate in a novel sealing structure for throttle valves.

[0021] Figure 7 This is a schematic diagram of the half-gear in a novel sealing structure for throttle valves.

[0022] Figure 8 This is a schematic diagram illustrating the working principle of a novel sealing structure for throttle valves.

[0023] The components include: housing 1, throat 2, sealing ring 3, annular groove 4, rotating shaft 5, screw 6, L-shaped connecting block 7, limiting hole 8, pin 9, through rod 10, valve plate 11, spring 12, half gear 13, arc-shaped limiting groove 14, and controller 15. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-8 In this embodiment of the present invention, a novel sealing structure for a throttle valve includes a housing 1, on which a throat 2 is integrally formed. A rotating shaft 5 is rotatably and sealedly installed inside the throat 2. A motor for driving the rotating shaft 5 is installed inside the housing 1. An L-shaped connecting block 7 is detachably installed on the outer wall of the rotating shaft 5 inside the throat 2. A valve plate 11 is rotatably installed on the L-shaped connecting block 7. A spring 12 is provided between the L-shaped connecting block 7 and the valve plate 11. A sealing ring 3 is provided on the inner wall of the throat 2. An annular groove 4 adapted to the valve plate 11 is provided in the opening of the sealing ring 3. The valve plate 11 is located in the annular groove 4.

[0026] By adopting the above-mentioned solution, when the valve is in the closed state, the valve plate 11 will be tightly attached to the inner wall of the annular groove 4 to ensure the sealing of the throat 2. When the valve is opened, the motor drives the rotating shaft 5 to rotate 20°, which can drive the L-shaped connecting block 7 to rotate. At this time, the valve plate 11 will move to the outside of the annular groove 4 under the drive of the L-shaped connecting block 7 and the action of the spring 12. Then the rotating shaft 5 continues to rotate, which can drive the valve plate 11 to rotate inside the throat 2 to achieve the purpose of controlling the valve opening. The overall structure is simple, the processing precision requirement is low, and the use effect is good.

[0027] Specific combination Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 8 A through rod 10 is installed on the L-shaped connecting block 7 through a limiting hole 8. A pin 9 is installed on the outer wall of the L-shaped connecting block 7 at the corresponding position of the limiting hole 8. The through rod 10 is movably sleeved on the pin 9. The through rod 10 and the pin 9 are clearance fit. One end of the through rod 10 is fixedly connected to the valve plate 11. The through rod 10 can swing around the pin 9 within the limiting hole 8.

[0028] Through the cooperation of the pin 9 and the through rod 10, when the L-shaped connecting block 7 rotates, it can drive the through rod 10 to swing within the limiting hole 8, thereby moving the valve plate 11 to the outside of the annular groove 4.

[0029] Specific combination Figure 2 In one embodiment of this utility model, positioning posts are fixedly provided on the outer walls of the L-shaped connecting block 7 and the valve plate 11 at the corresponding positions of the spring 12, and the two ends of the spring 12 are sleeved on the corresponding positioning posts to ensure the stability of the spring 12 installation.

[0030] Specific combination Figure 7 In one embodiment of this utility model, a half gear 13 is fixedly sleeved at one end of the rotating shaft 5 located inside the housing 1, and a drive gear is fixedly installed on the output shaft of the motor, and the drive gear and the half gear 13 mesh with each other.

[0031] Furthermore, an arc-shaped limiting groove 14 is provided on the half gear 13, and a limiting block is slidably installed in the arc-shaped limiting groove 14, and the limiting block is fixedly installed in the housing 1.

[0032] The start motor drives the drive gear to rotate, which in turn drives the half gear 13 to rotate. The rotation angle of the half gear 13 can be limited by the cooperation of the limit block and the arc-shaped limit groove 14.

[0033] Specific combination Figure 1 In one embodiment of the present invention, a controller 15 for controlling the motor is installed on the housing 1.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel sealing structure for a throttle valve, characterized in that: The device includes a housing (1), on which a throat (2) is integrally formed. A rotating shaft (5) is rotatably and sealedly installed inside the throat (2). A motor for driving the rotating shaft (5) is installed inside the housing (1). An L-shaped connecting block (7) is detachably installed on the outer wall of the rotating shaft (5) inside the throat (2). A valve plate (11) is rotatably installed on the L-shaped connecting block (7). A spring (12) is provided between the L-shaped connecting block (7) and the valve plate (11). A sealing ring (3) is provided on the inner wall of the throat (2). An annular groove (4) adapted to the valve plate (11) is provided in the opening of the sealing ring (3). The valve plate (11) is located in the annular groove (4).

2. The novel sealing structure for a throttle valve according to claim 1, characterized in that: A through rod (10) is installed on the L-shaped connecting block (7) through the limiting hole (8). A pin (9) is installed on the outer wall of the L-shaped connecting block (7) at the corresponding position of the limiting hole (8). The through rod (10) is movably sleeved on the pin (9). One end of the through rod (10) is fixedly connected to the valve plate (11). The through rod (10) can swing around the pin (9) in the limiting hole (8).

3. A novel sealing structure for a throttle valve according to claim 1, characterized in that: The outer walls of the L-shaped connecting block (7) and the valve plate (11) are fixedly provided with positioning posts at the corresponding positions of the spring (12), and the two ends of the spring (12) are sleeved on the corresponding positioning posts.

4. A novel sealing structure for a throttle valve according to claim 1, characterized in that: The shaft (5) is fixedly fitted with a half gear (13) at one end inside the housing (1), and the output shaft of the motor is fixedly fitted with a drive gear, and the drive gear and the half gear (13) mesh with each other.

5. A novel sealing structure for a throttle valve according to claim 4, characterized in that: The half gear (13) is provided with an arc-shaped limiting groove (14), and a limiting block is slidably installed in the arc-shaped limiting groove (14), and the limiting block is fixedly installed in the housing (1).

6. A novel sealing structure for a throttle valve according to claim 1, characterized in that: A controller (15) is installed on the housing (1).

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