A gas path flow direction display device

Abstract

The utility model relates to pneumatic actuator technical field, and disclose a kind of gas circuit flow direction display device, including with the cylinder body of external pipeline connection installation and detachably installed in the end cap for sealing both ends of cylinder body, further include: symmetrical sliding rack piston in cylinder body, two groups of rack piston divide cylinder body into inner chamber and outer chamber, the middle part of cylinder body is rotatably connected with output gear shaft, and the outer tooth of output gear shaft is engaged with rack piston respectively;The utility model is separated into independent inner chamber and outer chamber by two groups of symmetrical sliding rack piston, and the structural design of output gear shaft and rack piston engagement, when external gas circuit enters inner chamber or outer chamber by different inlet hole, can drive rack piston to drive output gear shaft to realize positive or reverse rotation flexibly, without disassembling entire device, the rotating direction demand of different valve can be satisfied, significantly improve the versatility and application flexibility of device.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic actuator technology, specifically to a pneumatic flow direction display device. Background Technology

[0002] In the field of industrial automation, valve systems, as core components for fluid (gas and liquid) transport and control, are widely used in critical scenarios such as chemical engineering, water treatment, energy, and intelligent manufacturing. The on / off state of a valve directly determines the flow rate, flow regulation accuracy, and system operational safety.

[0003] As the core power component driving valve movement, pneumatic actuators can display the air flow direction in real time and accurately. This is a key requirement for judging the valve's working status, avoiding production accidents (such as fluid leakage or process interruption) caused by misjudgment of status, and ensuring the stable operation of industrial systems. At the same time, clear air flow direction display can also simplify equipment maintenance procedures, help maintenance personnel quickly locate faults, and improve system maintenance efficiency.

[0004] However, in actual use, there are still some problems. The valves that come with some pneumatic actuators are not uniform and single. There are also valves that need to be closed clockwise and opened counterclockwise. However, most pneumatic actuators cannot be adapted to valves with opposite rotation directions. This leads to the need to add a specific pneumatic actuator to meet the valve detection requirements. This not only reduces the compatibility of pneumatic actuators, but also increases the cost of use and production efficiency. Therefore, we urgently need a pneumatic flow direction display device. Utility Model Content

[0005] This invention provides a pneumatic flow direction display device. By setting two sets of rack pistons, two different chambers are formed in the cylinder. Combined with the rotation of the output gear shaft and the indication of the indicator plate, the airflow direction is determined, which solves the problem of poor adaptability of pneumatic actuators caused by the existence of valves with different directions in the background art.

[0006] This utility model provides the following technical solution:

[0007] A pneumatic flow direction display device includes a cylinder body connected to an external pipeline and end caps detachably installed at both ends of the cylinder body for sealing. It also includes: rack pistons symmetrically sliding within the cylinder body, with two sets of rack pistons dividing the cylinder body into an inner chamber and an outer chamber; an output gear shaft rotatably connected to the middle of the cylinder body, with the outer teeth of the output gear shaft meshing with the rack pistons; when the two sets of rack pistons approach each other, a first working area is formed; when the two sets of rack pistons move away from each other, a second working area is formed; and an indicator part fixedly installed on the cylinder body for indicating orientation.

[0008] As a preferred technical solution of this utility model, the indicator part includes an indicator plate fixedly installed on the cylinder body. The indicator plate is located on the outer side of the end of the output gear shaft, and the indicator plate is symmetrically provided with grooves for marking the position.

[0009] As a preferred embodiment of this utility model, a fixing ring for supporting the output gear shaft is fixedly installed on the upper part of the indicator plate, the end of the output gear shaft extends outward and is rotatably connected to the fixing ring, and a notch for indication is provided at the end of the output gear shaft.

[0010] As a preferred technical solution of this utility model, a stop platform for restricting the transitional rotation of the output gear shaft is fixedly installed on the inner top wall of the cylinder, and the output gear shaft is sleeved on the stop platform.

[0011] As a preferred technical solution of this utility model, the cylinder body is symmetrically provided with air inlet holes for connecting with external pipes, one set of air inlet holes is connected to the inner cavity, and the other set of air inlet holes is connected to the outer cavity.

[0012] As a preferred embodiment of this invention, a sealing ring is provided between the output gear shaft and the cylinder body.

[0013] Compared with the prior art, the present invention provides a gas flow direction display device, which has the following advantages:

[0014] 1. In this pneumatic flow direction display device, the cylinder body is divided into an independent inner chamber and an outer chamber by two sets of symmetrically sliding rack pistons. The output gear shaft meshes with the rack piston. When the external air passage enters the inner or outer chamber through different air inlets, it can drive the rack piston to drive the output gear shaft to flexibly achieve forward or reverse rotation. There is no need to disassemble the entire device or purchase additional pneumatic actuators adapted to reverse rotation valves. This can meet the rotation direction requirements of different valves, effectively solving the problem that existing pneumatic actuators have poor adaptability and require additional specific actuators, resulting in increased usage costs and reduced production efficiency. This significantly improves the versatility and application flexibility of the device.

[0015] 2. In this airflow direction display device, the combination design of an indicator plate with symmetrical grooves, a fixing ring, and an indicator notch at the end of the output gear shaft allows the notch at the end of the output gear shaft to accurately correspond with the grooves on the indicator plate when the output gear shaft rotates, intuitively reflecting the airflow direction. At the same time, the fixing ring can stabilize the rotation trajectory of the output gear shaft, avoiding indication deviation caused by shaft shaking. This solves the problems of easy jamming and inaccurate indication in existing technologies that rely on limit switches for positioning shafts. It allows operators to quickly identify the airflow direction and valve status, reducing the risk of misjudgment and improving the convenience of operation and maintenance.

[0016] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model improves the adaptability and versatility of the device, the accuracy of the air path indication, and the convenience of operation and maintenance, effectively reducing the procurement and operation and maintenance costs of the valve system, while improving the production and processing efficiency and the delivery efficiency of the valve system; it realizes the need to adapt to valves with different rotation directions without disassembling the device or purchasing additional specific actuators, and realizes the intuitive and accurate display of the air path flow direction. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a first-view sectional structural diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention from a second perspective;

[0021] Figure 4 This is a schematic diagram of the indicator plate structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the rack and pinion piston structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the partial explosion structure of this utility model;

[0024] Figure 7 This is a schematic diagram of the cylinder structure of this utility model.

[0025] In the diagram: 1. Cylinder body; 2. End cover; 3. Rack piston; 4. Inner chamber; 5. Outer chamber; 6. Output gear shaft; 7. Indicator plate; 8. Groove; 9. Retaining ring; 10. Notch; 11. Stop plate; 12. Air inlet; 13. Sealing ring. Detailed Implementation

[0026] 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.

[0027] Example:

[0028] Reference Figures 1-7 A pneumatic flow direction indicator includes a cylinder 1 connected to an external pipeline and end caps 2 detachably mounted at both ends of the cylinder 1 for sealing. In this embodiment, the cylinder 1 provides a stable mounting base for the entire device, facilitating connection to an external pipeline. The detachable end caps 2 facilitate the inspection and replacement of components such as the rack and pinion piston 3 inside the cylinder 1, reducing maintenance difficulty and increasing the service life of the device. Furthermore, sealing gaskets are directly provided between the end caps 2 and the cylinder 1 for sealing.

[0029] It also includes rack pistons 3 that slide symmetrically within the cylinder body 1. The two sets of rack pistons 3 divide the cylinder body 1 into an inner chamber 4 and an outer chamber 5. An output gear shaft 6 is rotatably connected to the middle of the cylinder body 1, and the outer teeth of the output gear shaft 6 mesh with the rack pistons 3 respectively. The cylinder body 1 is symmetrically provided with air inlets 12 for connecting to external pipes. One set of air inlets 12 is connected to the inner chamber 4, and the other set of air inlets 12 is connected to the outer chamber 5. When the two sets of rack pistons 3 approach each other, a first working area is formed. When the two sets of rack pistons 3 move away from each other, a second working area is formed.

[0030] In this embodiment, the symmetrical sliding design of the two sets of rack pistons 3, in conjunction with their meshing with the output gear shaft 6, allows the airflow in the air passage to be converted into the rotational motion of the output gear shaft 6. When the air passage enters different chambers, the movement direction of the rack pistons 3 changes, causing the output gear shaft 6 to rotate in the forward or reverse direction. This allows it to adapt to valves with different rotation direction requirements without the need for additional specific pneumatic actuators, greatly improving the adaptability of the device and reducing the cost of use.

[0031] Furthermore, the cylinder body 1 is divided into an inner chamber 4 and an outer chamber 5, making the airflow in different chambers more independent and stable, ensuring the smoothness of the movement of the rack piston 3, and thus improving the accuracy of the rotation of the output gear shaft 6. In the first working zone state, the rack piston 3 rotates clockwise, and in the second working zone state, the rack piston 3 rotates counterclockwise.

[0032] Furthermore, the symmetrically arranged air inlets 12 are connected to different chambers, allowing the external air path to enter the corresponding chamber accurately and quickly, ensuring the timeliness and accuracy of air path switching, and thus ensuring the response speed of the rack piston 3 and the output gear shaft 6.

[0033] An indicator part is fixedly installed on the cylinder body 1 for indicating the direction. The indicator part includes an indicator plate 7 fixedly installed on the cylinder body 1. The indicator plate 7 is located on the outer side of the end of the output gear shaft 6, and the indicator plate 7 is symmetrically provided with grooves 8 for marking the position.

[0034] Here, the indicator plate 7 and the groove 8 on it can intuitively display the rotation position of the output gear shaft 6, thereby reflecting the flow direction of the air path. The groove 8 has two forms: a triangular groove 8 for the forward passage and a rectangular groove 8 for the reverse passage. The form of the groove 8 can be changed according to actual needs and is not limited to the form in this embodiment.

[0035] Furthermore, operators can quickly understand the airflow direction by observing the correspondence between the groove 8 on the indicator plate 7 and the indicator structure at the end of the output gear shaft 6, thus improving the convenience and accuracy of operation.

[0036] A retaining ring 9 for supporting the output gear shaft 6 is fixedly installed on the upper part of the indicator plate 7. The end of the output gear shaft 6 extends outward and is rotatably connected to the retaining ring 9. A notch 10 for indication is opened at the end of the output gear shaft 6. A stop table 11 for limiting the excessive rotation of the output gear shaft 6 is fixedly installed on the inner top wall of the cylinder body 1. The output gear shaft 6 is sleeved on the stop table 11.

[0037] Here, the retaining ring 9 provides additional support for the output gear shaft 6, ensuring the stability of the output gear shaft 6 during rotation, reducing wobbling, improving the accuracy of indication, and also reducing the hard friction between the output gear shaft 6 and the cylinder 1. The retaining ring 9 can be made of plastic, which is convenient for subsequent replacement.

[0038] Furthermore, the notch 10 at the end of the output gear shaft 6 cooperates with the groove 8 on the indicator plate 7 to further clarify the indication of the airflow direction, making the indication clearer and more intuitive. Through the design of the notch 10, the output gear shaft 6 can also be easily connected to other indicators that facilitate the observation of airflow.

[0039] Furthermore, the stop table 11 can effectively limit the rotation angle of the output gear shaft 6, preventing it from rotating excessively and causing the rack piston 3 to dislodge, thus damaging related components and improving the safety and reliability of the device.

[0040] A sealing ring 13 is provided between the output gear shaft 6 and the cylinder body 1.

[0041] Here, the sealing ring 13 between the output gear shaft 6 and the cylinder 1 can effectively prevent gas leakage inside the cylinder 1, ensure stable air pressure in the chamber, and improve the sealing performance and working efficiency of the device.

[0042] In this invention, when external gas enters through the air inlet 12 connected to the inner chamber 4, the air pressure inside the inner chamber 4 increases, pushing the two sets of rack pistons 3 away from each other to form a second working area. The rack pistons 3 drive the output gear shaft 6 to rotate, and the notch 10 at the end of the output gear shaft 6 corresponds to the corresponding groove 8 on the indicator plate 7, indicating the direction of airflow at this time. When external gas enters through the air inlet 12 connected to the outer chamber 5, the air pressure inside the outer chamber 5 increases, pushing the two sets of rack pistons 3 closer to each other to form a first working area. Similarly, the output gear shaft 6 is driven to rotate in the opposite direction, and the notch 10 corresponds to another groove 8 on the indicator plate 7, thus indicating the direction of airflow.

[0043] Components not described in detail in this article are existing technologies.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A gas flow direction display device, characterized in that, The cylinder body (1) is connected to and installed with an external pipeline, and end caps (2) are detachably installed at both ends of the cylinder body (1) for sealing. It also includes: A rack piston (3) slides symmetrically within a cylinder (1). The two sets of rack pistons (3) divide the cylinder (1) into an inner chamber (4) and an outer chamber (5). An output gear shaft (6) is rotatably connected to the middle of the cylinder (1), and the outer teeth of the output gear shaft (6) mesh with the rack pistons (3). When the two sets of rack pistons (3) approach each other, a first working area is formed. When the two sets of rack pistons (3) move away from each other, a second working area is formed. An indicator part is fixedly installed on the cylinder body (1) for indicating the orientation.

2. The airflow direction display device according to claim 1, characterized in that, The indicator includes an indicator plate (7) fixedly mounted on the cylinder body (1). The indicator plate (7) is located on the outside of the end of the output gear shaft (6), and the indicator plate (7) is symmetrically provided with grooves (8) for marking the position.

3. The airflow direction display device according to claim 2, characterized in that, The upper part of the indicator plate (7) is fixedly installed with a fixing ring (9) for supporting the output gear shaft (6). The end of the output gear shaft (6) extends outward and is rotatably connected to the fixing ring (9). The end of the output gear shaft (6) is provided with a notch (10) for indication.

4. The airflow direction display device according to claim 1, characterized in that, The inner top wall of the cylinder (1) is fixedly installed with a stop table (11) to restrict the transition rotation of the output gear shaft (6), and the output gear shaft (6) is sleeved on the stop table (11).

5. The airflow direction display device according to claim 1, characterized in that, The cylinder body (1) is symmetrically provided with air inlets (12) for connecting to external pipes. One set of air inlets (12) is connected to the inner chamber (4), and the other set of air inlets (12) is connected to the outer chamber (5).

6. The airflow direction display device according to claim 1, characterized in that, A sealing ring (13) is provided between the output gear shaft (6) and the cylinder body (1).

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