An electric pressure wave protection valve device

Abstract

The present invention discloses an electric pressure wave protection valve device, which comprises a frame and a cover plate. The frame includes a flat plate portion, a bottom plate portion and a support rod. The bottom plate portion is provided with an air inlet. The flat plate portion is supported above the bottom plate portion by the support rod. The cover plate is arranged between the flat plate portion and the bottom plate portion. A driving motor is arranged above the flat plate portion, and the output end of the driving motor is connected with a transmission mechanism for making the cover plate move linearly along the axial direction of the support rod relative to the air inlet. The electric pressure wave protection valve device of the present invention has the advantages of fast action response speed, high safety and reliability, low failure rate, simple and stable structure, easy installation and disassembly, convenient later maintenance, low maintenance cost and low manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit vehicle equipment, and particularly to an electric pressure wave protection valve device. Background Art

[0002] With the rapid development of trains in recent years, high-speed trains have emerged as the times require. With the increase in vehicle speed, higher requirements are correspondingly put forward for the comfort and safety of transportation tools. When the airtightness of the car body, doors and windows is ensured, the external air pressure fluctuations caused by the train passing through the tunnel or meeting are mainly transmitted to the interior of the car through the fresh air system, causing "tinnitus" of passengers. Therefore, when the vehicle speed is higher than 160 km / h, a pressure wave protection valve device is needed to solve the problem of internal pressure fluctuations in the car.

[0003] In the prior art, pneumatic or electric pressure wave protection valve devices are usually adopted. The operating air source of the pneumatic pressure wave protection valve device comes from the braking system of the train. Once a failure occurs in the braking system, it will bring very great potential safety hazards. Moreover, the cylinder of the pneumatic pressure wave protection valve device has a high cost, a large manufacturing difficulty, a complex control system structure, is extremely prone to air leakage and other phenomena at the connection, and has a large leak detection difficulty and a high maintenance cost. In the electric pressure wave protection valve device, the motor is usually arranged on the side wall of the valve body. Due to the uneven mass distribution of the side wall, the vibration generated during the train operation is extremely likely to cause the side wall of the valve body to deflect, affecting the service life of the protection valve. Moreover, during the closing process of the protection valve, relative slippage is likely to occur between the cover plate and the elastic sealing ring, wearing the elastic sealing ring.

[0004] Therefore, how to provide an electric pressure wave protection valve device with a fast action response speed, a high safety and reliability, a low failure rate, a simple and stable structure, easy installation and disassembly, convenient later maintenance, low maintenance cost and low manufacturing cost has become an urgent technical problem for those skilled in the art. Summary of the Invention

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An electric pressure wave protection valve device includes a frame and a cover plate. The frame includes a flat plate part, a bottom plate part and a support rod. The bottom plate part is provided with an air outlet. The flat plate part is supported above the bottom plate part by the support rod. The cover plate is arranged between the flat plate part and the bottom plate part. A driving motor is arranged above the flat plate part, and a transmission mechanism for making the cover plate move linearly along the axial direction of the support rod relative to the air outlet is connected to the output end of the driving motor.

[0007] For the above-mentioned electric pressure wave protection valve device, preferably, the driving motor is connected to a controller for controlling the operation of the driving motor.

[0008] For the above-mentioned electric pressure wave protection valve device, preferably, the controller is a servo system and the driving motor is a servo motor.

[0009] For the above-mentioned electric pressure wave protection valve device, preferably, the controller includes a train master control system and a limit switch for controlling the limit position of the cover plate, and the driving motor is a reduction motor.

[0010] For the above-mentioned electric pressure wave protection valve device, preferably, the transmission mechanism includes at least two guide rods, a lead screw and a lead screw nut. The cover plate is provided with a mounting portion and a plurality of guiding portions. The guide rods are arranged between the flat portion and the bottom plate portion and penetrate through the corresponding guiding portions. The lead screw nut is fixedly connected inside the mounting portion. The geometric center of the geometric figure formed by the center connection line of the mounting portion center and the centers of each guiding portion coincides. One end of the lead screw is connected to the output end of the driving motor, and the other end is threadedly connected to the lead screw nut.

[0011] For the above-mentioned electric pressure wave protection valve device, preferably, the guide rod is a cantilever rod, with one end fixed to the flat portion and the other end being a free end.

[0012] For the above-mentioned electric pressure wave protection valve device, preferably, the transmission mechanism includes at least two guide rods, a motor mounting bracket, a crank, a connecting rod and a fixed block. The cover plate is provided with a plurality of guiding portions. The guide rods are arranged between the flat portion and the bottom plate portion and penetrate through the corresponding guiding portions. The motor mounting bracket is arranged above the flat portion. The driving motor drives the crank to make a reciprocating swing. One end of the connecting rod is hinged to the crank, and the other end is hinged to the fixed block. The fixed block is fixedly connected to the cover plate and drives the cover plate to move. The geometric center of the geometric figure formed by the center connection line of the connection surface of the fixed block and the centers of each guiding portion coincides.

[0013] For the above-mentioned electric pressure wave protection valve device, preferably, at least two springs are provided on the cover plate.

[0014] For the above-mentioned electric pressure wave protection valve device, preferably, a linear bearing for reducing friction is provided at the connection between the guide rod and the cover plate.

[0015] For the above-mentioned electric pressure wave protection valve device, preferably, a sealing strip is provided at the periphery of the air inlet.

[0016] Compared with the prior art, the advantages of the present invention are as follows:

[0017] By arranging the drive motor above the flat plate part, the acting force generated by the drive motor is evenly distributed on the support rod through the flat plate part, avoiding arranging the drive motor on the side wall of the valve body, which may cause the side wall of the valve body to deflect and affect the service life of the protection valve. The output end of the drive motor is connected with a transmission mechanism for making the cover plate move linearly along the axial direction of the support rod relative to the air outlet. This transmission mechanism enables only the actions of mutual fitting or separation between the cover plate and the air outlet, and no relative sliding occurs between the cover plate and the air outlet. Therefore, wear between the cover plate and the air outlet can be avoided, and the maintenance period and the service life of the protection valve can be extended. The electric pressure wave protection valve device of the present invention also has the advantages of safety and reliability, low failure rate, simple structure, easy loading and unloading, and convenient maintenance. Description of the Drawings

[0018] Figure 1 It is a three-dimensional structure diagram of the electric pressure wave protection valve device of Embodiment 1.

[0019] Figure 2 It is a three-dimensional structure diagram of the electric pressure wave protection valve device of Embodiment 1 with the front-end motor mounting bracket hidden.

[0020] Figure 3 It is a front view structure diagram of the electric pressure wave protection valve device of Embodiment 1.

[0021] Figure 4 It is a side view structure diagram of the electric pressure wave protection valve device of Embodiment 1.

[0022] Figure 5 It is a three-dimensional structure diagram of the electric pressure wave protection valve device of Embodiment 2.

[0023] Figure 6 It is a side view structure diagram of the electric pressure wave protection valve device of Embodiment 2.

[0024] Figure 7 It is a three-dimensional structure diagram of the electric pressure wave protection valve device of Embodiment 3.

[0025] Figure 8 It is a front view structure diagram of the electric pressure wave protection valve device of Embodiment 3.

[0026] Figure 9 It is a three-dimensional structure diagram of the electric pressure wave protection valve device of Embodiment 4.

[0027] Figure 10 It is a front view structure diagram of the electric pressure wave protection valve device of Embodiment 4.

[0028] Legend Explanation:

[0029] 1. Frame; 11. Flat plate part; 12. Bottom plate part; 13. Support rod; 14. Air outlet; 15. Sealing strip; 2. Cover plate; 21. Installation part; 22. Guide part; 5. Driving motor; 6. Transmission mechanism; 61. Guide rod; 62. Lead screw; 63. Lead screw nut; 64. Motor mounting bracket; 65. Crank; 66. Connecting rod; 67. Fixed block; 68. Spring; 8. Linear bearing; 9. Controller; 91. Limit switch. Detailed implementation mode

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Embodiment 1

[0032] As Figures 1 to 4 shown, the electric pressure wave protection valve device of this embodiment includes a frame 1 and a cover plate 2. The frame 1 includes a flat plate part 11, a bottom plate part 12 and a support rod 13. The bottom plate part 12 is provided with an air outlet 14. The flat plate part 11 is supported above the bottom plate part 12 by the support rod 13. The cover plate 2 is arranged between the flat plate part 11 and the bottom plate part 12. A driving motor 5 is arranged above the flat plate part 11. The output end of the driving motor 5 is connected with a transmission mechanism 6 for making the cover plate 2 move linearly along the axial direction of the support rod 13 relative to the air outlet 14. By arranging the driving motor 5 above the flat plate part 11, the acting force generated by the driving motor 5 is evenly distributed on the support rod 13 through the flat plate part 11, avoiding setting the driving motor 5 on the side wall of the valve body, causing the side wall of the valve body to deflect and affecting the service life of the protection valve. The transmission mechanism 6 enables only the actions of mutual fitting or separation between the cover plate 2 and the air outlet 14, and no relative sliding occurs between the cover plate 2 and the air outlet 14. Therefore, wear between the cover plate 2 and the air outlet 14 can be avoided, and the maintenance cycle and the service life of the protection valve can be prolonged.

[0033] In this embodiment, the driving motor 5 is connected with a controller 9 for controlling the action of the driving motor 5. The controller 9 is used to control the forward and reverse rotation and the running time of the driving motor 5. By controlling the forward or reverse rotation of the driving motor 5, the transmission mechanism 6 and the cover plate 2 are driven, so that the cover plate 2 fits or separates relative to the air outlet 14. By controlling the running time of the driving motor 5, the distance between the cover plate 2 and the air outlet 14 can be controlled, the opening degree of the air outlet 14 can be adjusted, and thus the air flow rate of the air outlet 14 can be controlled.

[0034] In this embodiment, the controller 9 is the train total control system, which is convenient for the centralized control of the protection valve.

[0035] In this embodiment, the transmission mechanism 6 includes at least two guide rods 61, a motor mounting bracket 64, a crank 65, a connecting rod 66, and a fixing block 67. The cover plate 2 is provided with a plurality of guiding portions 22. The guide rods 61 are arranged between the flat plate portion 11 and the bottom plate portion 12 and penetrate through the corresponding guiding portions 22. The motor mounting bracket 64 is arranged above the flat plate portion 11. The driving motor 5 drives the crank 65 to swing reciprocally. One end of the connecting rod 66 is hinged to the crank 65, and the other end is hinged to the fixing block 67. The fixing block 67 is fixedly connected to the cover plate 2 and drives the cover plate 2 to move. The geometric center of the geometric figure formed by the center connection line of the connection surface of the fixing block 67 and the centers of the respective guiding portions 22 coincides, and the acting force transmitted by the fixing block 67 is evenly distributed to each guiding portion 22. At this time, the resultant moment of the cover plate 2 is zero, and the cover plate 2 is not prone to tilt and jamming during movement. The transmission mechanism 6 of this embodiment belongs to a type of crank-slider mechanism and has the characteristics of fast reaction speed and reliable movement of the crank-slider mechanism.

[0036] In this embodiment, preferably, the guide rod 61 is a cantilever rod, with one end fixed to the flat plate portion 11 and the other end being a free end. Since vibrations often occur during the operation of the train, it is easy for the axis of the guiding portion 22 to deviate from the axis of the guide rod 61, resulting in jamming. Therefore, by setting one end of the guide rod 61 as a free end, it can offset together with the cover plate 2, reducing the offset amount between the axis of the guiding portion 22 and the axis of the guide rod 61, playing a role of self-adjustment. The guide rod 61 can also utilize the strength and toughness of the material itself to play a role in absorbing and reducing vibrations.

[0037] In this embodiment, two springs 68 are provided on the cover plate 2. Preferably, the springs 68 are sleeved on the respective guide rods 61. One end of each spring 68 is connected to the cover plate 2, and the other end is connected to the flat plate portion 11. When the cover plate 2 moves to the dead center position, the springs 68 can provide an elastic force, and the resultant force of the elastic forces can make the cover plate 2 break away from the dead center position, thereby preventing the cover plate 2 from getting stuck. The springs 68 can also play a buffering role in the sliding of the cover plate 2, making the operation of the cover plate 2 more stable. In other embodiments, the springs 68 can also be connected between the cover plate 2 and the bottom plate portion 12 to play the same role for the cover plate 2.

[0038] In this embodiment, a linear bearing 8 for reducing friction is provided at the connection between the guide rod 61 and the cover plate 2, and the linear bearing 8 has high sensitivity and can achieve high-precision smooth linear motion.

[0039] In this embodiment, a sealing strip 15 is provided at the four peripheral edges of the air outlet 14. Through the fitting of the cover plate 2, the air outlet 14 has better sealing performance, avoiding deformation of the air outlet 14 and the cover plate 2 due to excessive fitting.

[0040] Embodiment 2

[0041] As Figures 5 to 6As shown, this embodiment is basically similar to embodiment 1, and the difference between this embodiment and embodiment 1 is that, in this embodiment, four springs 68 are provided on the cover plate 2. Preferably, the spring 68 is mounted on each support rod 13, one end of the spring 68 is connected to the cover plate 2, and the other end is connected to the bottom plate portion 12. When the cover plate 2 moves to the dead point position, the spring 68 can provide an elastic force, and the combined force of the elastic forces can make the cover plate 2 escape from the dead point position, thereby preventing the cover plate 2 from getting stuck. The spring 68 can also play a buffering role on the sliding of the cover plate 2, so that the cover plate 2 runs more smoothly. In other embodiments, the spring 68 can also be connected between the cover plate 2 and the flat plate portion 11, playing the same role on the cover plate 2.

[0042] Example 3

[0043] like Figures 7 to 8 As shown, the electric pressure wave protection valve device of this embodiment includes a frame 1 and a cover plate 2. The frame 1 includes a flat plate portion 11, a bottom plate portion 12 and a support rod 13. The bottom plate portion 12 is provided with an air outlet 14. The flat plate portion 11 is supported above the bottom plate portion 12 by the support rod 13. The cover plate 2 is arranged between the flat plate portion 11 and the bottom plate portion 12. A driving motor 5 is arranged above the flat plate portion 11. The output end of the driving motor 5 is connected to a transmission mechanism 6 for making the cover plate 2 move linearly relative to the air outlet 14 along the axial direction of the support rod 13. By arranging the driving motor 5 above the flat plate portion 11, the force generated by the driving motor 5 is evenly distributed to the support rod 13 through the flat plate portion 11, avoiding the driving motor 5 being arranged on the side wall of the valve body, causing the side wall of the valve body to deflect, and affecting the service life of the protection valve. The transmission mechanism 6 allows the cover plate 2 and the air outlet 14 to only fit together or move away from each other, and no relative slippage occurs between the cover plate 2 and the air outlet 14, thereby avoiding wear between the cover plate 2 and the air outlet 14 and extending the maintenance cycle and the service life of the protection valve.

[0044] In this embodiment, the drive motor 5 is connected to a controller 9 for controlling the action of the drive motor 5. The controller 9 is used to control the forward and reverse rotation and the running time of the drive motor 5. By controlling the forward or reverse rotation of the drive motor 5, the transmission mechanism 6 and the cover plate 2 are driven, so that the cover plate 2 is either close to or away from the air outlet 14. By controlling the running time of the drive motor 5, the distance between the cover plate 2 and the air outlet 14 can be controlled, and the opening and closing degree of the air outlet 14 can be adjusted, thereby controlling the air circulation rate of the air outlet 14.

[0045] In this embodiment, the controller 9 is a servo system, and the driving motor 5 is a servo motor. The servo system and the servo motor can accurately control the displacement of the cover plate 2, thereby accurately controlling the opening and closing degree of the air outlet 14.

[0046] In this embodiment, the transmission mechanism 6 includes at least two guide rods 61, a lead screw 62 and a lead screw nut 63. The cover plate 2 is provided with a mounting portion 21 and a plurality of guiding portions 22. The guide rods 61 are arranged between the flat plate portion 11 and the bottom plate portion 12 and penetrate through the corresponding guiding portions 22. The lead screw nut 63 is fixedly connected inside the mounting portion 21. The geometric center of the geometric figure formed by the center connection line of the mounting portion 21 and the centers of the respective guiding portions 22 coincides, evenly distributing the acting force transmitted by the lead screw nut 63 to each guiding portion 22, and making the resultant moment of the cover plate 2 zero, so that the cover plate 2 is not prone to flipping and jamming during movement. One end of the lead screw 62 is connected to the output end of the driving motor 5, and the other end is threadedly connected to the lead screw nut 63. The transmission mechanism 6 of this embodiment belongs to a ball screw nut pair and has the advantages of high transmission efficiency, high transmission accuracy, and reversible transmission.

[0047] In this embodiment, the guide rod 61 is a cantilever rod, with one end fixed to the flat plate portion 11 and the other end being a free end. Since vibrations are often generated during the operation of the train, it is easy for the axis of the guiding portion 22 to deviate from the axis of the guide rod 61, resulting in jamming. Therefore, setting one end of the guide rod 61 as a free end allows it to shift together with the cover plate 2, reducing the deviation amount between the axis of the guiding portion 22 and the axis of the guide rod 61, playing a self-adjusting role. The guide rod 61 can also utilize the strength and toughness of its own material to play a role in absorbing and reducing vibrations.

[0048] In this embodiment, a linear bearing 8 for reducing friction is provided at the connection between the guide rod 61 and the cover plate 2, and the linear bearing 8 has high sensitivity and can achieve high-precision smooth linear motion.

[0049] In this embodiment, sealing strips 15 are provided at the four peripheral edges of the air outlet 14. Through the fitting of the cover plate 2, the air outlet 14 has better sealing performance, avoiding deformation of the air outlet 14 and the cover plate 2 due to excessive fitting.

[0050] Embodiment 4

[0051] As Figures 9 to 10As shown in the figure, the electric pressure wave protection valve device of this embodiment includes a frame 1 and a cover plate 2. The frame 1 includes a flat plate portion 11, a bottom plate portion 12, and a support rod 13. The bottom plate portion 12 is provided with an air outlet 14. The flat plate portion 11 is supported above the bottom plate portion 12 by the support rod 13. The cover plate 2 is arranged between the flat plate portion 11 and the bottom plate portion 12. A driving motor 5 is arranged above the flat plate portion 11. The output end of the driving motor 5 is connected with a transmission mechanism 6 for making the cover plate 2 move linearly along the axial direction of the support rod 13 relative to the air outlet 14. By arranging the driving motor 5 above the flat plate portion 11, the acting force generated by the driving motor 5 is evenly distributed to the support rod 13 through the flat plate portion 11, avoiding setting the driving motor 5 on the side wall of the valve body, which may cause the side wall of the valve body to deflect and affect the service life of the protection valve. The transmission mechanism 6 enables only the actions of mutual fitting or separation between the cover plate 2 and the air outlet 14, and no relative sliding occurs between the cover plate 2 and the air outlet 14. Therefore, wear between the cover plate 2 and the air outlet 14 can be avoided, and the maintenance period and the service life of the protection valve can be extended.

[0052] In this embodiment, the driving motor 5 is connected with a controller 9 for controlling the action of the driving motor 5. The controller 9 is used to control the forward and reverse rotation and the running time of the driving motor 5. By controlling the forward or reverse rotation of the driving motor 5, the transmission mechanism 6 and the cover plate 2 are driven, so that the cover plate 2 fits or separates relative to the air outlet 14. By controlling the running time of the driving motor 5, the distance between the cover plate 2 and the air outlet 14 can be controlled, the opening degree of the air outlet 14 can be adjusted, and thus the air flow rate of the air outlet 14 can be controlled.

[0053] In this embodiment, the controller 9 includes a train total control system and a limit switch 91 for controlling the limit position of the cover plate 2, and the driving motor 5 is a reduction motor.

[0054] In this embodiment, the transmission mechanism 6 includes at least two guide rods 61, a lead screw 62, and a lead screw nut 63. The cover plate 2 is provided with a mounting portion 21 and a plurality of guide portions 22. The guide rods 61 are arranged between the flat plate portion 11 and the bottom plate portion 12 and penetrate through the corresponding guide portions 22. The lead screw nut 63 is fixedly connected inside the mounting portion 21. The geometric center of the geometric figure formed by the center of the mounting portion 21 and the center connection lines of the respective guide portions 22 coincides, evenly distributing the acting force transmitted by the lead screw nut 63 to each guide portion 22, and making the resultant moment of the cover plate 2 zero, so that the cover plate 2 is not prone to flipping and jamming during the movement process. One end of the lead screw 62 is connected to the output end of the driving motor 5, and the other end is in threaded connection with the lead screw nut 63. The transmission mechanism 6 of this embodiment belongs to a ball screw nut pair, which has the advantages of high transmission efficiency, high transmission precision, and reversible transmission.

[0055] In this embodiment, the guide rod 61 is a cantilever rod, with one end fixed to the flat plate portion 11 and the other end being a free end. Since vibrations often occur during train operation, it is easy for the axis of the guide portion 22 to deviate from the axis of the guide rod 61, resulting in jamming. Therefore, by setting one end of the guide rod 61 as a free end, it can offset together with the cover plate 2, reducing the offset amount between the axis of the guide portion 22 and the axis of the guide rod 61, and playing a role of self-adjustment. The guide rod 61 can also utilize the strength and toughness of its own material to play a role in absorbing and reducing vibrations.

[0056] In this embodiment, a sealing strip 15 is provided at the four peripheral edges of the air outlet 14. Through the fitting of the cover plate 2, the air outlet 14 has better sealing performance, avoiding deformation of the air outlet 14 and the cover plate 2 due to excessive fitting.

[0057] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art of this technology, the improvements and transformations obtained without departing from the technical concept of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An electric pressure wave protection valve device, comprising a frame (1) and a cover plate (2). The frame (1) includes a flat plate portion (11), a bottom plate portion (12), and a support rod (13). The bottom plate portion (12) is provided with an air inlet (14). The flat plate portion (11) is supported above the bottom plate portion (12) by the support rod (13). The cover plate (2) is arranged between the flat plate portion (11) and the bottom plate portion (12). Characterized in that: A driving motor (5) is arranged above the flat plate portion (11). The output end of the driving motor (5) is connected to a transmission mechanism (6) for making the cover plate (2) move linearly along the axial direction of the support rod (13) relative to the air inlet (14). The driving motor (5) is connected to a controller (9) for controlling the operation of the driving motor (5). The controller (9) is a servo system, and the driving motor (5) is a servo motor. The controller (9) includes a train total control system and a limit switch (91) for controlling the limit position of the cover plate (2). The driving motor (5) is a reduction motor. The transmission mechanism (6) includes at least two guide rods (61), a lead screw (62), and a lead screw nut (63). The cover plate (2) is provided with a mounting portion (21) and a plurality of guiding portions (22). The guide rods (61) are arranged between the flat plate portion (11) and the bottom plate portion (12) and penetrate through the corresponding guiding portions (22). The lead screw nut (63) is fixedly connected inside the mounting portion (21). The geometric center of the geometric figure formed by the center connection line between the center of the mounting portion (21) and the centers of the respective guiding portions (22) coincides. One end of the lead screw (62) is connected to the output end of the driving motor (5), and the other end is threadedly connected to the lead screw nut (63). The guide rod (61) is a cantilever rod, with one end fixed to the flat plate portion (11) and the other end being a free end.

2. The electric pressure wave protection valve device according to claim 1, Characterized in that: A sealing strip (15) is provided at the periphery of the air inlet (14).

3. An electric pressure wave protection valve device, comprising a frame (1) and a cover plate (2). The frame (1) includes a flat plate portion (11), a bottom plate portion (12), and a support rod (13). The bottom plate portion (12) is provided with an air inlet (14). The flat plate portion (11) is supported above the bottom plate portion (12) by the support rod (13). The cover plate (2) is arranged between the flat plate portion (11) and the bottom plate portion (12). Characterized in that: Above the flat part (11), there is a driving motor (5). The output end of the driving motor (5) is connected to a transmission mechanism (6) for making the cover plate (2) move linearly along the axial direction of the support rod (13) relative to the air outlet (14). The driving motor (5) is connected to a controller (9) for controlling the operation of the driving motor (5). The controller (9) is a servo system, and the driving motor (5) is a servo motor. The controller (9) includes a train master control system and a limit switch (91) for controlling the limit position of the cover plate (2). The driving motor (5) is a reduction motor. The transmission mechanism (6) includes at least two guide rods (61), a motor mounting frame (64), a crank (65), a connecting rod (66), and a fixed block (67). The cover plate (2) is provided with a plurality of guide parts (22). The guide rods (61) are arranged between the flat part (11) and the bottom plate part (12) and penetrate through the corresponding guide parts (22). The motor mounting frame (64) is arranged above the flat part (11). The driving motor (5) drives the crank (65) to make a reciprocating swing. One end of the connecting rod (66) is hinged to the crank (65), and the other end is hinged to the fixed block (67). The fixed block (67) is fixedly connected to the cover plate (2) and drives the cover plate (2) to move. The geometric center of the geometric figure formed by the center connection line of the connection surface of the fixed block (67) and the centers of the guide parts (22) coincides.

4. The electric pressure wave protection valve device according to claim 3, characterized in that: At least two springs (68) are provided on the cover plate (2).

5. The electric pressure wave protection valve device according to claim 3, characterized in that: A linear bearing (8) for reducing friction is provided at the connection between the guide rod (61) and the cover plate (2).

6. The electric pressure wave protection valve device according to claim 3, characterized in that: A sealing strip (15) is provided at the periphery of the air outlet (14).

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