Air cylinder device

Abstract

The utility model relates to the technical field of air cylinders for valves, in particular to an air cylinder device which comprises a cylinder body, a first air cylinder, a second air cylinder and a third air cylinder. The cylinder cover assembly comprises a first cylinder cover and a second cylinder cover which are arranged on the cylinder body, and the first cylinder cover and the second cylinder cover are oppositely arranged; the piston assembly comprises a piston rod and a first piston, one end of the piston rod penetrates through the first cylinder cover, and the other end of the piston rod is connected with the first piston; the first piston is located in the first containing cavity. The transmission assembly comprises a shell and a transmission part, the transmission part is arranged in the shell, the shell and the first cylinder cover are integrally formed, and the transmission part is in transmission connection with the piston rod. According to the air cylinder, on one hand, mounting of the transmission assembly is omitted, on the other hand, the transmission assembly and the air cylinder device have high mounting precision, and the air cylinder is suitable for high-precision matching occasions.

Description

Technical Field

[0001] This disclosure relates to the field of cylinder technology for valves, and in particular to a cylinder device. Background Technology

[0002] Valves play a vital role in industrial production and social life, and are widely used in petroleum, chemical, power, construction, and water conservancy industries. Valves are essential fluid control devices in industry, affecting many sectors of the national economy and serving as a crucial foundation for national economic development. Valves can be used to control the flow of various types of fluids, including air, water, steam, various corrosive media, slurry, oil, liquid metals, and radioactive media. They are control components in pipeline fluid transport systems, possessing functions such as guiding, stopping, throttling, check valves, diverting flow, and overflow pressure relief.

[0003] A cylinder is the actuator of a valve, causing the valve to reciprocate due to the thrust and pull provided by the cylinder. A cylinder is a cylindrical metal component that guides a piston in linear reciprocating motion within the cylinder. Traditional valve actuator cylinders are mostly standalone structures. After purchasing the cylinder, the manufacturer needs to install it onto the valve via a transmission assembly. Because manual installation introduces precision deviations, it is difficult to apply to applications requiring high-precision fitting. Utility Model Content

[0004] In view of the shortcomings or problems existing in the prior art, this disclosure provides a cylinder device in which the piston of the cylinder can be effectively buffered for a long time during operation.

[0005] The technical solution adopted by this disclosure to solve the above-mentioned technical problem is: a cylinder device, comprising:

[0006] A cylinder body, wherein a first receiving cavity is provided inside the cylinder body;

[0007] A cylinder head assembly, comprising a first cylinder head and a second cylinder head disposed on a cylinder block, the first cylinder head and the second cylinder head being disposed opposite to each other;

[0008] A piston assembly, the piston assembly including a piston rod and a first piston, one end of the piston rod passing through a first cylinder head, and the other end of the piston rod being connected to the first piston; the first piston is located in a first receiving cavity;

[0009] A transmission assembly, comprising a housing and a transmission component, wherein the transmission component is disposed inside the housing, the housing is integrally formed with the first cylinder head, and the transmission component is connected to the piston rod for transmission.

[0010] In a preferred embodiment, a receiving housing is also included, which is integrally formed with the first cylinder head and is used to receive the piston rod.

[0011] In a preferred embodiment, a rack structure is provided at the end of the piston rod away from the first piston, and the transmission component is a gear, which meshes with the rack structure.

[0012] In a preferred embodiment, the second cylinder head is provided with a first cavity and a first airflow channel that are interconnected, and a first seal is provided at the opening of the first cavity; the piston assembly also includes a piston seat connected to the first piston, the piston seat is located in the first receiving cavity, the piston rod, the first piston and the piston seat move synchronously, the piston seat is positioned facing the first cavity, and the piston seat is provided with a first channel and a second channel that are interconnected, the first airflow channel is connected to the second channel; the first piston includes a first retracted state and a second retracted state, when the first piston is in the first retracted state, the piston seat is not in contact with the first seal, and the first receiving cavity is directly connected to the first cavity; when the first piston is in the second retracted state, the piston seat is in contact with the first seal, and the first receiving cavity is connected to the first cavity through the first channel and the second channel.

[0013] In a preferred embodiment, a first mounting groove is provided at the opening of the first cavity, and the first sealing element is disposed in the first mounting groove. The first sealing element is a one-way sealing ring and has an annular structure. A plurality of protrusions are provided on one side of the annular structure, and a first gap is provided between two adjacent protrusions. A plurality of concave areas are provided on the outer peripheral wall of the annular structure, and the concave areas are provided corresponding to the first gaps. The side of the first sealing element with protrusions faces the piston seat.

[0014] In a preferred embodiment, the second cylinder head is further provided with a first connecting channel and a second air hole. The second air hole is connected to the first airflow channel. The second air hole is arranged along the thickness direction of the second cylinder head. The first connecting channel is connected to the second air hole and the second airflow channel respectively.

[0015] In a preferred embodiment, the second cylinder head is further provided with a first adjustment channel, the second air hole is connected to the first adjustment channel, and a first adjustment member is provided in the first adjustment channel. The intake flow of the second air hole is controlled by adjusting the position of the first adjustment member in the first adjustment channel.

[0016] In a preferred embodiment, the second cylinder head is further provided with a first receiving hole, which is connected to the second airflow passage, and a first one-way valve is provided in the first receiving hole.

[0017] In a preferred embodiment, the second channel is disposed inside the piston seat and is arranged along the thickness direction of the piston seat.

[0018] In a preferred embodiment, a venting groove is provided on the surface of the piston seat. The venting groove is arranged along the length of the piston seat and the length of the venting groove is less than the length of the piston seat. The first end of the piston seat is connected to the first piston. The venting groove is located near the first end of the piston seat. One end of the first channel is located in the venting groove and the other end is located on the inner peripheral wall of the second channel.

[0019] In a preferred embodiment, the first channel is disposed at the first end near the piston seat, and the first piston also includes a third retracted state. When the first piston is in the third retracted state, the piston seat is in contact with the first seal, and the vent groove is at least partially located in the first cavity. The first receiving cavity is connected to the first cavity through the first channel and the vent groove.

[0020] In a preferred embodiment, the end of the piston seat away from the first piston is the second end, and an opening groove is provided on the end face of the second end of the piston seat. The bottom of the opening groove is connected to the second channel, and the opening groove is used to connect the throttling assembly.

[0021] In a preferred embodiment, a second mounting groove is provided on the piston seat, and a second sealing element is provided in the second mounting groove. The second sealing element is disposed between the piston seat and the first piston.

[0022] In a preferred embodiment, the first cylinder head is provided with a second cavity and a third airflow passage that are interconnected, and a third seal is provided at the opening of the second cavity; the first piston also includes a first forward state and a second forward state. When the first piston is in the first forward state, the first piston is not in contact with the third seal, and the first receiving cavity is directly connected to the second cavity; when the first piston is in the second forward state, the first piston is in contact with the third seal, and the first receiving cavity is not connected to the second cavity.

[0023] In a preferred embodiment, an annular protrusion is provided on the side of the first piston away from the piston seat, and a tapered surface is provided at the end of the annular protrusion. When the first piston is in the second forward state, the tapered surface contacts the third seal.

[0024] In a preferred embodiment, a third mounting groove is provided at the opening of the second cavity, and the third sealing element is disposed in the third mounting groove.

[0025] In a preferred embodiment, a fourth airflow channel is provided on the first cylinder head, and the third airflow channel is arranged along the thickness direction of the first cylinder head, and the fourth airflow channel is connected to the third airflow channel.

[0026] In a preferred embodiment, the first cylinder head is further provided with a second connecting channel, and the fourth airflow channel and the third airflow channel are connected through the second connecting channel.

[0027] In a preferred embodiment, a second adjustment channel is also provided on the first cylinder head, and the third airflow channel is connected to the second adjustment channel. A second adjustment element is provided in the second adjustment channel, and the intake flow rate of the third airflow channel is controlled by adjusting the position of the second adjustment element in the second adjustment channel.

[0028] In a preferred embodiment, the first cylinder head is further provided with a second receiving hole, which is connected to the fourth airflow passage, and a second one-way valve is provided in the second receiving hole.

[0029] Compared with existing products, the housing of the transmission component in this application is integrally formed with the first cylinder head. On the one hand, this eliminates the need for separate installation of the transmission component, and on the other hand, it allows for higher installation accuracy between the transmission component and the cylinder assembly. This avoids the tolerances that exist between the first cylinder head and the housing of the transmission component during manual installation, making it suitable for high-precision fitting applications. In addition, it can also prevent jamming or wear of the transmission component or piston rod due to installation accuracy deviations when the transmission component and piston rod are connected. As a result, the maintenance frequency of the cylinder assembly can be effectively reduced, and the service life of the cylinder assembly can be increased. Attached Figure Description

[0030] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0031] Figure 1 This is a cross-sectional view of a cylinder device disclosed herein;

[0032] Figure 2 This is a public announcement Figure 1 A magnified view of a section at point A in the middle;

[0033] Figure 3 This is one of the structural schematic diagrams of a cylinder device disclosed herein;

[0034] Figure 4 This is the second schematic diagram of a cylinder device disclosed herein;

[0035] Figure 5 This is a schematic diagram of the connection between the first cylinder head and the transmission assembly disclosed herein;

[0036] Figure 6 This is a cross-sectional view of the connection between the first cylinder head and the transmission assembly disclosed herein;

[0037] Figure 7This is one of the structural schematic diagrams of the second cylinder head disclosed herein;

[0038] Figure 8 This is the second schematic diagram of the structure of the second cylinder head disclosed herein;

[0039] Figure 9 This is one of the cross-sectional views of the second cylinder head disclosed herein;

[0040] Figure 10 This is the second sectional view of the second cylinder head disclosed herein;

[0041] Figure 11 This is one of the sectional views of the first cylinder head disclosed herein;

[0042] Figure 12 This is the second sectional view of the first cylinder head disclosed herein.

[0043] Figure 13 This is one of the structural schematic diagrams of the first sealing element disclosed herein;

[0044] Figure 14 This is the second schematic diagram of the structure of the first sealing element disclosed herein;

[0045] Figure 15 This is a schematic diagram of the piston seat structure disclosed herein;

[0046] Figure 16 This is a cross-sectional view of the piston seat disclosed herein;

[0047] Figure 17 This is a schematic diagram of the structure of the first piston disclosed in this paper.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Cylinder block; 2. Second cylinder head; 3. First cylinder head; 4. First receiving cavity; 5. First cavity body; 6. First mounting groove; 7. Piston seat; 8. Piston rod; 9. First piston; 10. Transmission assembly; 11. First channel; 12. Second channel; 13. Vent groove; 14. Opening groove; 15. Receiving housing; 16. Rack structure; 17. First airflow channel; 18. Second airflow channel; 19. Fourth airflow channel; 20. First annular groove; 21. Second annular groove; 22. First adjustment channel; 23. Second adjustment channel; 24. Second cavity; 25. First air hole; 26. Second air hole; 27. First receiving hole; 28. Second receiving hole; 29. ​​First connecting channel; 30. Second connecting channel; 32. Third airflow channel; 33. Second mounting groove; 36. Third mounting groove; 37. Conical surface; 38. First gap; 39. Concave; 40. Protrusion; 41. Fourth air hole. Detailed Implementation

[0050] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0051] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0052] Please refer to Figures 1-4 As shown, this application provides a cylinder device, including: a cylinder body 1, with a first receiving cavity 4 disposed inside the cylinder body 1; a cylinder head assembly, including a first cylinder head 3 and a second cylinder head 2 disposed on the cylinder body 1, the first cylinder head 3 and the second cylinder head 2 being disposed opposite to each other; a piston assembly, including a piston rod 8 and a first piston 9, one end of the piston rod 8 passing through the first cylinder head 3, and the other end of the piston rod 8 being connected to the first piston 9; the first piston 9 being located in the first receiving cavity 4; and a transmission assembly 10, including a housing and a transmission component, the transmission component being disposed inside the housing, the housing being integrally formed with the first cylinder head 3, and the transmission component being drively connected to the piston rod 8. Because the housing of the transmission assembly is integrally formed with the first cylinder head, the installation of the transmission assembly is eliminated, and the transmission assembly and cylinder device have high installation accuracy. This avoids the tolerances that exist between the first cylinder head and the housing of the transmission assembly during manual installation, making it suitable for high-precision fitting applications. In addition, it can also avoid jamming or wear of the transmission component or piston rod due to installation accuracy deviations when the transmission component and piston rod are connected. As a result, the maintenance frequency of the cylinder device can be effectively reduced, and the service life of the cylinder device can be improved.

[0053] Furthermore, it also includes a housing 15, which is integrally formed with the first cylinder head 3 and is used to house the piston rod 8. A rack structure 16 is provided at the end of the piston rod 8 furthest from the first piston 9, and the transmission component is a gear, which meshes with the rack structure 16. The integral forming of the housing 15, the first cylinder head 3, and the outer shell effectively ensures the accuracy during installation and avoids problems such as jamming, excessive wear, etc., of the gear and rack structure 16.

[0054] Please refer to the following: Figures 7-10 , Figure 15 and Figure 16As shown, in one embodiment of this disclosure, the second cylinder head 2 is provided with a first cavity 5 and a first airflow channel 17 that are interconnected. The lower end of the first airflow channel 17 is located on the inner wall of the first cavity 5, and a first seal is provided at the opening of the first cavity 5. The piston assembly also includes a piston seat 7 connected to the first piston 9. The piston seat 7 is located in the first receiving cavity 4. The piston seat 7 is fixedly connected to the first piston 9 or connected by threads. The piston rod 8, the first piston 9, and the piston seat 7 move synchronously. The piston seat 7 is positioned directly opposite the first cavity 5. The piston seat 7 is provided with a first channel 11 and a second channel 12 that are interconnected. The first airflow channel 17 is connected to the second channel 12. The first piston 9 includes a first retraction state and a second retraction state. When the first piston 9 is in the first retraction state, the piston seat 7 is not in contact with the first seal, and the first receiving cavity 4 is directly connected to the first cavity 5. When the first piston 9 is in the second retraction state, the piston seat 7 is in contact with the first seal, and the first receiving cavity 4 is connected to the first cavity 5 through the first channel 11 and the second channel 12.

[0055] Because the second cylinder head 2 is provided with a first cavity 5 and a first airflow channel 17 that are interconnected, and the piston seat 7 is provided with a first channel 11 and a second channel 12 that are interconnected, and the first airflow channel 17 is connected to the second channel 12, when the first piston 9 is in the first retraction state, the piston seat 7 is not in contact with the first seal, and the first receiving cavity 4 is directly connected to the first cavity 5. The gas in the first receiving cavity 4 enters the first cavity 5 and the first airflow channel 17 sequentially from the first receiving cavity 4 and is discharged. When the first piston 9 is in the second retraction state, the piston seat 7 is in contact with the first seal, and the piston seat 7 blocks the opening of the first cavity 5. The first receiving cavity 4 is connected to the first cavity 5 through the first channel 11 and the second channel 12. The gas in the first receiving cavity 4 enters the first channel 11, the second channel 12, the first cavity 5 and the first airflow channel 17 sequentially and is discharged. The first piston 9 in the first retraction state... In the first retraction state, the exhaust velocity is much greater than that in the second retraction state. Therefore, in the second retraction state, the speed at which the first piston 9 moves toward the second cylinder head 2 is much less than that in the first retraction state. The movement speed of the first piston 9 in the second retraction state is effectively and significantly reduced, thereby buffering the first piston 9, preventing the valve plate from impacting the valve body, and protecting the valve components. This application adjusts the flow rate of gas from the first receiving cavity 4 to the first airflow channel 17 as the first piston 9 approaches the second cylinder head 2 by setting a first channel 11 and a second channel 12 on the piston seat 7, thereby effectively adjusting the speed at which the first piston 9 moves toward the second cylinder head 2. The structures of the first channel 11, the second channel 12, and the first airflow channel 17 in this application are stable and will not fail over time, thus affecting the buffering effect of the cylinder.

[0056] Please continue reading. Figure 1 , Figure 13 and Figure 14 As shown, further, a first mounting groove 6 is provided at the opening of the first cavity 5, and a first sealing element is disposed in the first mounting groove 6. Specifically, the first sealing element is a one-way sealing ring with an annular structure. Several protrusions 40 are provided on one side of the annular structure, and a first gap 38 is provided between two adjacent protrusions 40. Several recesses 39 are provided on the outer peripheral wall of the annular structure, corresponding to the first gaps 38. The side of the first sealing element with protrusions 40 faces the piston seat 7. When the piston seat 7 contacts the first sealing element, as the piston seat 7 continues to advance, the first sealing element will be compressed. The side of the first sealing element without protrusions 40 will be pressed tightly against the inner wall of the first mounting groove 6. At this time, the gas in the first receiving cavity 4 cannot directly enter the first cavity 5 from the opening of the first cavity 5. The recess 39 and the first gap 38 are designed to ensure that, even when the first seal is compressed by the piston seat 7, the gas in the first cavity 5 can still enter the first receiving cavity 4 through the recess 39 and the first gap 38 when the second cylinder head 2 is intake.

[0057] like Figure 17 As shown, further, the outer peripheral wall of the first piston 9 is provided with a first annular groove 20 and a second annular groove 21. The first annular groove 20 is closer to the second cylinder head 2 than the second annular groove 21. A guide ring is provided in the first annular groove 20. The guide ring is used to guide the first piston 9 in the cylinder to ensure that it moves along the correct path. On the other hand, the guide ring also supports the first piston 9 to prevent the first piston 9 from directly contacting the cylinder body 1 and reducing friction. A first sealing gasket is provided in the second annular groove 21. Specifically, the first sealing gasket is an O-ring. The first sealing gasket is provided to prevent gas from flowing into the other side chamber of the first piston 9.

[0058] Please continue reading. Figures 7-10As shown, in one embodiment of this disclosure, the second cylinder head 2 is provided with a second airflow channel 18 and a first air hole 25. The first air hole 25 is arranged along the thickness direction of the second cylinder head 2 and is connected to the first airflow channel 17 and the second airflow channel 18, respectively. The second cylinder head 2 is also provided with a first connecting channel 29 and a second air hole 26. The surface of the second air hole 26 is plugged with steel balls, and the interior of the second air hole 26 is connected to the first airflow channel 17. The second air hole 26 is arranged along the thickness direction of the second cylinder head 2, and the first connecting channel 29 is connected to the second air hole 26 and the second airflow channel 18, respectively. Specifically, the first airflow channel 17 and the second airflow channel 18 are arranged parallel to each other inside the second cylinder head 2. The interior of the second air hole 26 is connected to the second airflow channel 18 through the first connecting channel 29, and one end of the first air hole 25 is located in the second airflow channel 18. The gas in the first cavity 5 enters the first airflow channel 17 and flows to the second air hole 26, then sequentially enters the first connecting channel 29 and the second airflow channel 18, and finally exits the cylinder through the first air hole 25.

[0059] It should be noted that during the process of the first piston 9 advancing towards the second cylinder head 2, the gas in the first receiving cavity 4 first enters the first chamber 5 and flows outward through the first airflow channel 17. When the first piston 9 is in the first retracted state, the piston seat 7 is not in contact with the first seal, and the first receiving cavity 4 is directly connected to the first chamber 5. The gas in the first receiving cavity 4 directly enters the first chamber 5, then enters the first airflow channel 17, and finally exits through the first vent 25. When the first piston 9 is in the second retraction state, the piston seat 7 contacts the first seal, blocking the opening of the first cavity 5. The first receiving cavity 4 is connected to the first cavity 5 through the first channel 11 and the second channel 12. Since the diameter of the first channel 11 is relatively narrow, the intake volume of the first cavity 5 through the first channel 11 is much less than the intake volume when the first receiving cavity 4 is directly connected to the first cavity 5. Therefore, when the first piston 9 is in the second retraction state, the gas flow rate entering the first airflow channel 17 from the first cavity 5 is greatly reduced, which greatly reduces the exhaust volume of the first air hole 25, thereby greatly reducing the speed at which the first piston 9 pushes towards the second cylinder head 2.

[0060] Specifically, the second cylinder head 2 is also provided with a first adjusting channel 22. One end of the second air port 26 is located in the first adjusting channel 22. A first adjusting member is provided in the first adjusting channel 22. By adjusting the position of the first adjusting member in the first adjusting channel 22, the intake flow rate of gas from the first airflow channel 17 into the second air port 26 is controlled. Specifically, the first adjusting channel 22 is provided with an internal thread, and the first adjusting member is a conical member with an external thread. By screwing the external thread and the internal thread together, the gap between the outer wall of the conical member and the inner wall of the first adjusting channel 22 is adjusted. The larger the gap between the two, the greater the gas flow rate from the first airflow channel 17 into the second air port 26; conversely, the smaller the gap between the two, the smaller the gas flow rate from the first airflow channel 17 into the second air port 26. This is used to adjust the intake flow rate of the second air port 26. It can be understood that when the second air port 26 is completely blocked, the gas in the first airflow channel 17 will not be able to enter the second air port 26. When the second air port 26 is fully open, the intake flow rate is at its maximum. The second vent 26 is an adjustable vent, allowing the user to adjust the gap between the outer wall of the conical part and the inner wall of the first adjustment channel 22 as needed, thereby indirectly adjusting the exhaust volume of the first vent 25.

[0061] Please refer to the following: Figure 15 and Figure 16As shown, it should be noted that the second channel 12 is located inside the piston seat 7 and is arranged along the thickness direction of the piston seat 7. A venting groove 13 is formed on the surface of the piston seat 7 and is arranged along the length direction of the piston seat 7. The venting groove 13 is preferably an oblong groove, and its length is less than the length of the piston seat 7. The first end of the piston seat 7 is connected to the first piston 9. The venting groove 13 is located near the first end of the piston seat 7. One end of the first channel 11 is located in the venting groove 13, and the other end is located on the inner peripheral wall of the second channel 12. The first channel 11 is located near the first end of the piston seat 7. The first piston 9 also includes a third retracted state. When the first piston 9 is in the third retracted state, the piston seat 7 is in contact with the first seal. Part of the venting groove 13 is located in the first cavity 5, and the other part is located in the first receiving cavity 4. The first receiving cavity 4 is divided into two paths and communicates with the first cavity 5. The first path: the first receiving cavity 4 communicates with the first cavity 5 through the first channel 11 and the second channel 12; the second path: the first receiving cavity 4 communicates with the first cavity 5 through the venting groove 13. In this way, the gas in the first receiving groove can enter the first cavity 5 through the first through hole and the venting groove 13 respectively, and then enter the first airflow channel 17. When the first piston 9 is in the third retracted state, the gas flow rate entering the first airflow channel 17 is greater than the gas flow rate when the first piston 9 is in the second retracted state. It is understandable that when the first piston 9 is in the first retraction state, its speed of advancing towards the second cylinder head 2 is the fastest. When the first piston 9 is in the second retraction state, the vent groove 13 has not yet entered the first cavity 5, and the gas in the first receiving cavity 4 can only enter the first cavity 5 through the first channel 11, so its speed of advancing towards the second cylinder head 2 is the slowest. When the first piston 9 is in the third retraction state, its speed of advancing towards the second cylinder head 2 is between the first retraction state and the second retraction state. Understandably, when the first piston 9 is in its first retraction state, the distance between it and the second cylinder head 2 is still considerable, allowing for rapid advancement to meet the requirements of quick valve opening or closing. In its second retraction state, the distance between the first piston 9 and the second cylinder head 2 is already relatively close, necessitating an emergency slowdown of the rapidly moving first piston 9; therefore, its advancement speed in the second retraction state should be very slow. In its third retraction state, the first piston 9 is even closer to the second cylinder head 2, but because its speed is still very slow, an increased airflow is needed to accelerate its advancement speed, thereby meeting the requirements of quick valve opening or closing. Although the advancement speed of the first piston 9 towards the second cylinder head 2 is increased in the third retraction state, it is still slower than in its first retraction state.

[0062] Preferably, the end of the piston seat 7 furthest from the first piston 9 is the second end. An opening groove 14 is provided on the end face of the second end of the piston seat 7. The bottom of the opening groove 14 communicates with the second channel 12. The opening groove 14 is used to connect a throttling assembly, thereby regulating the gas flow rate entering the first chamber 5. Specifically, the throttling assembly is a plug. Different plugs have slots of different sizes. The user can select a plug with a suitable slot size as needed to regulate the gas flow rate entering the first chamber 5 from the second channel 12, thereby regulating the speed at which the first piston 9 propels towards the second cylinder head 2.

[0063] A second mounting groove 33 is provided on the piston seat 7, and a second sealing element is provided in the second mounting groove 33. The second sealing element is provided between the piston seat 7 and the first piston 9 to improve the airtightness between the first piston 9 and the piston seat 7.

[0064] like Figure 5 , Figure 6 , Figure 11 and Figure 12 As shown, in one embodiment of this disclosure, a second cavity 24 and a third airflow channel 32 are provided on the first cylinder head 3, which are interconnected. A third seal is provided at the opening of the second cavity 24. The first piston 9 includes a first forward state and a second forward state. When the first piston 9 is in the first forward state, the first piston 9 is not in contact with the third seal, and the first receiving cavity 4 is directly connected to the second cavity 24. When the first piston 9 is in the second forward state, the first piston 9 is in contact with the third seal, and the first receiving cavity 4 is not connected to the second cavity 24. Specifically, a third mounting groove 36 is provided at the opening of the second cavity 24, and the third seal is disposed in the third mounting groove 36. An annular protrusion is provided on the side of the first piston 9 away from the piston seat 7, and a conical surface 37 is provided at the end of the annular protrusion. When the first piston 9 is in the second forward state, the conical surface 37 is in contact with the third seal. After the conical surface 37 is in contact with the third seal, the gas in the first receiving cavity 4 cannot enter the second cavity 24.

[0065] Specifically, the first cylinder head 3 is provided with a third airflow channel 32 and a fourth airflow channel 19. The third airflow channel 32 is arranged along the thickness direction of the first cylinder head 3, and the third airflow channel 32 is connected to the fourth airflow channel 19. When the first piston 9 is in the first forward state, there is a large distance between the conical surface 37 and the third seal. Part of the gas in the first receiving cavity 4 directly enters the third airflow channel 32 from the front end and then exits through the fourth airflow channel 19. The other part enters the second cavity 24 from the first receiving cavity 4, then enters the third airflow channel 32 from the rear end and finally exits through the fourth airflow channel 19. When the first piston 9 is in the second forward state, after the conical surface 37 contacts the third seal, the gas in the first receiving cavity 4 cannot enter the second cavity 24. The gas can only enter the third airflow channel 32 from the front end. In other words, when the first piston 9 is in the second forward state, the total amount of gas entering the third airflow channel 32 is reduced, and therefore the total amount of gas discharged from the fourth airflow channel 19 is also reduced accordingly. As a result, the pushing speed of the first piston 9 toward the first cylinder head 3 is reduced, effectively preventing the first piston 9 from hitting the first cylinder head 3 at a relatively high speed.

[0066] Specifically, the first cylinder head 3 is also provided with a second connecting channel 30, through which the fourth airflow channel 19 and the third airflow channel 32 are connected. The first cylinder head 3 is also provided with a second adjusting channel 23, which intersects with the third airflow channel 32. A second adjusting member is provided in the second adjusting channel 23, and the intake flow rate of the third airflow channel 32 is controlled by adjusting the position of the second adjusting member in the second adjusting channel 23. The second adjusting channel 23 and the second adjusting member cooperate to adjust the intake flow rate of the third airflow channel 32. The adjustment method is similar to that of the first adjusting member and will not be described in detail here.

[0067] It should be noted that the cylinder in this application is applicable to valves, especially swing valves. Swing valves require a very fast opening speed, while the closing speed can be slightly slower. When the swing valve opens, the first piston 9 in the cylinder pushes towards the second cylinder head 2; when the swing valve closes, the first piston 9 in the cylinder pushes towards the first cylinder head 3. Because the swing valve opens quickly, the piston seat 7 and the second cylinder head 2 are provided with multiple buffer channels to cushion the first piston 9, thereby preventing the valve plate from impacting the valve body and protecting the valve components. Because the swing valve closes relatively slowly, the first cylinder head 3 does not need to be provided with multiple buffer channels to cushion the first piston 9.

[0068] like Figures 9-12As shown, to further control the exhaust flow of the first cylinder head 3 and the second cylinder head 2, the second cylinder head 2 is also provided with a first receiving hole 27, which is connected to the second airflow channel 18, and a first one-way valve is installed in the first receiving hole 27. The first cylinder head 3 is also provided with a second receiving hole 28, which is connected to the fourth airflow channel 19, and a second one-way valve is installed in the second receiving hole 28. The arrangement of the first one-way valve and the second one-way valve ensures that the first receiving hole 27 and the second receiving hole 28 can only allow air to enter and not exhaust, thus effectively controlling the exhaust flow of the first cylinder head 3 and the second cylinder head 2 without affecting the efficiency of the first cylinder head 3 and the second cylinder head 2 during air intake.

[0069] It should be noted that the first cylinder head 3 also has a fourth air hole 41 along its thickness direction, and the fourth air hole 41 is connected to the first air hole 25 through an external pipe. During the process of the first piston 9 moving from the first cylinder head 3 to the second cylinder head 2, the gas in the cylinder is discharged through the first air hole 25, and the outside gas enters the cylinder through the fourth airflow channel 19; during the process of the first piston 9 moving from the second cylinder head 2 to the first cylinder head 3, the gas in the cylinder is discharged through the fourth airflow channel 19, and the outside gas enters the cylinder through the fourth air hole 41 and the first air hole 25.

[0070] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A cylinder device, characterized in that, include: A cylinder body (1) is provided with a first receiving cavity (4) inside the cylinder body (1); Cylinder head assembly, the cylinder head assembly including a first cylinder head (3) and a second cylinder head (2) disposed on a cylinder block (1), the first cylinder head (3) and the second cylinder head (2) being disposed opposite to each other; A piston assembly, comprising a piston rod (8) and a first piston (9), one end of the piston rod (8) passing through a first cylinder head (3), and the other end of the piston rod (8) being connected to the first piston (9); the first piston (9) being located in a first receiving cavity (4); The transmission assembly (10) includes a housing and a transmission component. The transmission component is located inside the housing. The housing is integrally formed with the first cylinder head (3). The transmission component is connected to the piston rod (8) in a transmission connection.

2. The cylinder device according to claim 1, characterized in that, It also includes a housing (15) integrally formed with the first cylinder head (3), the housing (15) being used to accommodate the piston rod (8).

3. The cylinder device according to claim 1, characterized in that, The piston rod (8) is provided with a rack structure (16) at the end away from the first piston (9), and the transmission component is a gear, which meshes with the rack structure (16).

4. The cylinder device according to claim 1, characterized in that, The second cylinder head (2) is provided with a first cavity (5) and a first airflow passage (17) that are interconnected. A first seal is provided at the opening of the first cavity (5). The piston assembly also includes a piston seat (7) connected to the first piston (9). The piston seat (7) is located in the first receiving cavity (4). The piston rod (8), the first piston (9) and the piston seat (7) move synchronously. The piston seat (7) is positioned directly opposite the first cavity (5). The piston seat (7) is provided with a first channel (11) and a second channel that are interconnected. (12) The first airflow channel (17) is connected to the second channel (12); the first piston (9) includes a first retraction state and a second retraction state. When the first piston (9) is in the first retraction state, the piston seat (7) is not in contact with the first seal, and the first receiving cavity (4) is directly connected to the first cavity (5); when the first piston (9) is in the second retraction state, the piston seat (7) is in contact with the first seal, and the first receiving cavity (4) is connected to the first cavity (5) through the first channel (11) and the second channel (12).

5. The cylinder device according to claim 4, characterized in that, The first cavity (5) has a first mounting groove (6) at its opening. The first seal is located in the first mounting groove (6). The first seal is a one-way sealing ring. The first seal is an annular structure. A number of protrusions (40) are provided on one side of the annular structure. A first gap (38) is provided between two adjacent protrusions (40). A number of indentations (39) are provided on the outer peripheral wall of the annular structure. The indentations (39) are provided in correspondence with the first gaps (38). The side of the first seal with the protrusions (40) faces the piston seat (7).

6. The cylinder device according to claim 4, characterized in that, The second cylinder head (2) is also provided with a first connecting channel (29) and a second air hole (26). The second air hole (26) is connected to the first airflow channel (17). The second air hole (26) is arranged along the thickness direction of the second cylinder head (2). The first connecting channel (29) is connected to the second air hole (26) and the second airflow channel (18) respectively.

7. The cylinder device according to claim 6, characterized in that, The second cylinder head (2) is also provided with a first adjustment channel (22), and the second air hole (26) is connected to the first adjustment channel (22). A first adjustment element is provided in the first adjustment channel (22), and the air intake flow of the second air hole (26) is controlled by adjusting the position of the first adjustment element in the first adjustment channel (22).

8. The cylinder device according to claim 6, characterized in that, The second cylinder head (2) is also provided with a first receiving hole (27), which is connected to the second airflow channel (18), and a first one-way valve is provided in the first receiving hole (27).

9. The cylinder device according to claim 4, characterized in that, A ventilation groove (13) is provided on the surface of the piston seat (7). The ventilation groove (13) is arranged along the length direction of the piston seat (7). The length of the ventilation groove (13) is less than the length of the piston seat (7). The first end of the piston seat (7) is connected to the first piston (9). The ventilation groove (13) is located near the first end of the piston seat (7). One end of the first channel (11) is located in the ventilation groove (13), and the other end is located on the inner peripheral wall of the second channel (12).

10. The cylinder device according to claim 9, characterized in that, The first channel (11) is located near the first end of the piston seat (7). The first piston (9) also includes a third retraction state. When the first piston (9) is in the third retraction state, the piston seat (7) is in contact with the first seal. The vent groove (13) is at least partially located in the first cavity (5). The first receiving cavity (4) is connected to the first cavity (5) through the first channel (11) and the vent groove (13).

11. The cylinder device according to claim 10, characterized in that, The end of the piston seat (7) away from the first piston (9) is the second end. An opening groove (14) is provided on the end face of the second end of the piston seat (7). The bottom of the opening groove (14) is connected to the second channel (12). The opening groove (14) is used to connect the throttling assembly.

12. The cylinder device according to claim 4, characterized in that, The first cylinder head (3) is provided with a second cavity (24) and a third airflow channel (32) that are interconnected. A third seal is provided at the opening of the second cavity (24). The first piston (9) also includes a first forward state and a second forward state. When the first piston (9) is in the first forward state, the first piston (9) is not in contact with the third seal, and the first receiving cavity (4) is directly connected to the second cavity (24). When the first piston (9) is in the second forward state, the first piston (9) is in contact with the third seal, and the first receiving cavity (4) is not connected to the second cavity (24).

13. The cylinder device according to claim 12, characterized in that, The first piston (9) has an annular protrusion on the side away from the piston seat (7), and a tapered surface (37) is provided at the end of the annular protrusion. When the first piston (9) is in the second forward state, the tapered surface (37) contacts the third seal.

14. The cylinder device according to claim 12, characterized in that, The first cylinder head (3) is provided with a fourth airflow channel (19), and the third airflow channel (32) is arranged along the thickness direction of the first cylinder head (3). The fourth airflow channel (19) is connected to the third airflow channel (32).

15. The cylinder device according to claim 14, characterized in that, The first cylinder head (3) is also provided with a second connecting channel (30), and the fourth airflow channel (19) and the third airflow channel (32) are connected through the second connecting channel (30); the first cylinder head (3) is also provided with a second adjusting channel (23), and the third airflow channel (32) is connected to the second adjusting channel (23). A second adjusting member is provided in the second adjusting channel (23), and the intake flow of the third airflow channel (32) is controlled by adjusting the position of the second adjusting member in the second adjusting channel (23).

16. The cylinder device according to claim 14, characterized in that, The first cylinder head (3) is also provided with a second receiving hole (28), which is connected to the fourth airflow channel (19), and a second one-way valve is provided in the second receiving hole (28).

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