A cylinder for detecting gas cross leakage

Abstract

The utility model provides a kind of anti- stringing detection cylinder, it is related to detection cylinder technical field, including cylinder body, piston rod, piston head, detection airflow channel, cylinder airflow channel, exhalation groove and exhaust hole, the piston rod is movably arranged in the inside of cylinder body, the piston head is fixed in the end of piston rod and is sealed with the inner wall of cylinder body, the detection airflow channel is set in the upper surface of cylinder body.In the utility model, by setting independent detection airflow channel and cylinder airflow channel in the inside of cylinder body, and annular exhalation groove is opened in the cooperation area between piston rod and the inner wall of cylinder body, simultaneously, exhaust hole is set in the lowest point of exhalation groove and is communicated with it, so that when cylinder airflow enters detection area due to sealing failure or gap leakage, it can be guided along exhalation groove and directly discharged into atmosphere from exhaust hole, effectively prevent airflow from stringing into product internal and cause positive pressure interference, avoid affecting sealing detection result, ensure the stability and detection precision of detection airflow.

Description

Technical Field

[0001] This utility model relates to the field of detection cylinder technology, and in particular to an anti-cross-flow detection cylinder. Background Technology

[0002] With the continuous improvement of industrial automation, pneumatic testing technology has been widely used in sealing tests in the fields of electronics, automobiles, medical, and packaging. As a key actuator for realizing the integration of automatic clamping and airtightness testing, the testing cylinder not only needs to complete mechanical actions, but also needs to stably deliver the testing airflow to the inside of the product being tested in order to determine whether there is a leak. In order to improve production efficiency and testing accuracy, higher requirements have been placed on the structural design of the testing cylinder, especially in multi-station continuous testing and high-cycle operation, it is necessary to ensure that the testing process is not disturbed by the airflow of the cylinder itself.

[0003] In existing technologies, conventional testing cylinders typically integrate the air path that drives the cylinder's movement with the air path used for product testing into the same cylinder structure. However, there is a lack of effective isolation and pressure relief measures between the two. In actual use, when the cylinder piston seals wear, age, or there are gaps in the assembly, compressed air can leak from the cylinder airflow channel to the area between the piston rod and the inner wall of the cylinder. Because the detection airflow channel and the internal space of the cylinder are structurally adjacent or poorly sealed, the leaked high-pressure gas can easily enter the detection airflow channel and enter the interior of the product being tested with the detection airflow, causing an abnormal increase in the pressure in the product cavity and creating a false "positive pressure" state. At this time, even if the product itself has a leak, the detection system cannot accurately identify it, resulting in misjudgment and serious problems such as "unable to detect product leakage" or "missed detection," thus requiring improvement. Utility Model Content

[0004] This utility model mainly provides a cylinder for detecting gas leakage.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an anti-cross-flow detection cylinder, comprising a cylinder body, a piston rod, a piston head, a detection airflow channel, a cylinder airflow channel, an exhalation groove, and an exhaust port. The piston rod is movably inserted inside the cylinder body, the piston head is fixed to the end of the piston rod and seals against the inner wall of the cylinder body, the detection airflow channel is located on the upper surface of the cylinder body, the cylinder airflow channel is located on the upper surface of the cylinder body, the exhalation groove is located on the inner wall of the cylinder body, and the exhaust port is located on the side wall of the cylinder body.

[0006] Preferably, the exhalation groove is located in the mating area between the piston rod and the inner wall of the cylinder. The shape of the exhalation groove is an annular groove. By setting an annular groove in the piston movement range, the gas guiding area is increased, so that the leaked cylinder airflow can enter the exhalation groove evenly in the circumferential direction, avoiding local pressure accumulation and improving pressure relief efficiency.

[0007] Preferably, one end of the exhaust port is connected to the interior of the exhalation groove. By directly connecting the exhaust port and the exhalation groove, a low-resistance exhaust channel is formed, ensuring that the gas leaking from the cylinder cavity can be discharged into the atmosphere in a timely and smooth manner, preventing gas from entering the detection airflow channel, and ensuring that the detection process is not disturbed.

[0008] Preferably, the exhaust port is located at the lowest point of the exhalation groove. The exhaust port is a through-hole structure. By setting the exhaust port at the lowest position of the exhalation groove, gravity is used to discharge condensate or impurities along with the airflow, avoiding liquid accumulation and blockage of the channel. At the same time, the through-hole structure is easy to process and maintain, ensuring long-term stable and reliable exhaust function.

[0009] Compared with the prior art, the advantages and positive effects of this utility model are as follows: In this invention, by setting independent detection airflow channels and cylinder airflow channels inside the cylinder body, and opening an annular exhalation groove in the mating area between the piston rod and the inner wall of the cylinder body, and setting an exhaust hole communicating with the lowest point of the exhalation groove, when the cylinder airflow enters the detection area due to sealing failure or gap leakage, it can be guided along the exhalation groove and directly discharged into the atmosphere through the exhaust hole. This effectively prevents the airflow from entering the product and causing positive pressure interference, avoids affecting the sealing test results, and ensures the stability and accuracy of the detection airflow. Attached Figure Description

[0010] Figure 1 A cross-sectional view of an anti-gas leakage detection cylinder is provided for this utility model; Figure 2 This utility model presents a partial structural diagram of the cylinder body of an anti-gas leakage detection cylinder.

[0011] Illustration: 1. Cylinder block; 2. Piston rod; 3. Piston head; 4. Detection airflow channel; 5. Cylinder airflow channel; 6. Exhalation groove; 7. Exhaust port. Detailed Implementation

[0012] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0013] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0014] Please see Figures 1-2This utility model provides a technical solution: an anti-cross-flow detection cylinder, including a cylinder body 1, a piston rod 2, a piston head 3, a detection airflow channel 4, a cylinder airflow channel 5, an exhalation groove 6, and an exhaust port 7. The piston rod 2 is movably inserted inside the cylinder body 1, the piston head 3 is fixed to the end of the piston rod 2 and is sealed to the inner wall of the cylinder body 1, the detection airflow channel 4 is located on the upper surface of the cylinder body 1, the cylinder airflow channel 5 is located on the upper surface of the cylinder body 1, the exhalation groove 6 is opened on the inner wall of the cylinder body 1, and the exhaust port 7 is opened on the side wall of the cylinder body 1.

[0015] like Figure 2 As shown, the exhalation groove 6 is located in the mating area between the piston rod 2 and the inner wall of the cylinder 1. The shape of the exhalation groove 6 is an annular groove. By setting an annular groove in the piston movement range, the gas guiding area is increased, so that the leaked cylinder airflow can enter the exhalation groove 6 evenly in the circumference, avoiding local pressure accumulation and improving the pressure relief efficiency.

[0016] like Figure 2 As shown, one end of the exhaust port 7 is connected to the interior of the exhalation groove 6. By directly connecting the exhaust port 7 and the exhalation groove 6, a low-resistance exhaust channel is formed, ensuring that the gas leaking from the cylinder cavity can be discharged into the atmosphere in a timely and smooth manner, preventing the gas from entering the detection airflow channel 4, and ensuring that the detection process is not interfered with.

[0017] like Figure 2 As shown, the exhaust port 7 is located at the lowest point of the exhalation groove 6. The exhaust port 7 is a through-hole structure. By setting the exhaust port 7 at the lowest position of the exhalation groove 6, gravity is used to discharge condensate or impurities along with the airflow, avoiding liquid accumulation and blockage of the channel. At the same time, the through-hole structure is easy to process and maintain, ensuring long-term stable and reliable exhaust function.

[0018] The operating method and working principle of this device are as follows: During operation, compressed air enters the cylinder body 1 through the cylinder airflow channel 5, pushing the piston head 3 and causing the piston rod 2 to reciprocate linearly along the inner wall of the cylinder body 1, thus extending or retracting the cylinder. During the piston movement, some gas may leak due to wear of the sealing ring or clearance fit, entering the area between the piston rod 2 and the inner wall of the cylinder body 1. At this time, the annular exhalation groove 6 on the inner wall of the cylinder body 1 acts as a guide structure, receiving the gas leaking from the cylinder airflow channel 5 and utilizing the circumferential connectivity of its annular groove to ensure uniform gas distribution along the groove. Subsequently, the leaked gas is discharged through the exhaust port 7, which is directly connected to the interior of the exhalation groove 6. The vent 7 is located at the lowest point of the exhalation groove 6 and has a through-hole structure, ensuring that the gas is smoothly discharged into the atmosphere under pressure. At the same time, any condensate or small impurities carried by the gas are also discharged with the airflow, preventing them from accumulating in the groove. Meanwhile, the detection airflow is delivered to the front end of the cylinder through the independently set detection airflow channel 4 and enters the interior of the product under test for sealing testing. Due to the presence of the exhalation groove 6 and the vent 7, any leakage in the cylinder airflow is promptly discharged and will not enter the detection airflow channel 4, thus ensuring that the internal pressure of the product is stable during the testing process, the detection airflow is not disturbed, and the leakage detection operation can be completed normally. After the action is completed, the cylinder returns to its original state, and the entire passage returns to its initial state, waiting for the next cycle.

[0019] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A cylinder for detecting cross-contamination of air, characterized in that, include: The cylinder (1), piston rod (2), piston head (3), detection airflow channel (4), cylinder airflow channel (5), exhalation groove (6) and exhaust port (7) are provided. The piston rod (2) is movably inserted inside the cylinder (1). The piston head (3) is fixed to the end of the piston rod (2) and sealed to the inner wall of the cylinder (1). The detection airflow channel (4) is located on the upper surface of the cylinder (1). The cylinder airflow channel (5) is located on the upper surface of the cylinder (1). The exhalation groove (6) is located on the inner wall of the cylinder (1). The exhaust port (7) is located on the side wall of the cylinder (1).

2. The anti-cross-flow detection cylinder according to claim 1, characterized in that: The exhalation groove (6) is located in the mating area between the piston rod (2) and the inner wall of the cylinder (1), and the shape of the exhalation groove (6) is an annular groove.

3. The anti-cross-flow detection cylinder according to claim 1, characterized in that: One end of the exhaust port (7) is connected to the interior of the exhalation groove (6).

4. The anti-cross-gas detection cylinder according to claim 1, characterized in that: The exhaust port (7) is located at the lowest point of the exhalation groove (6), and the exhaust port (7) is a through hole structure.

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