Sealing performance detection device for rubber sealing element

Abstract

The utility model discloses a sealing performance detection device for a rubber sealing element, which relates to the field of detection equipment, and adopts the technical scheme that the sealing performance detection device comprises a rack, a driving rod is arranged on the rack, the driving rod is a telescopic rod, and a lower pressing plate is detachably arranged on a movable part of the driving rod; the lower pressing plate is integrally in a disc shape, an air inlet is formed in the middle of the lower pressing plate, and a connector is arranged on the lower pressing plate located at the air inlet and connected with an air source through an air pipe. A detection base plate is further arranged on the rack, the detection base plate corresponds to the lower pressing plate, the detection base plate is disc-shaped, and a plurality of annular detection grooves are formed in the upper surface of the detection base plate; and the air pressure detection unit is used for detecting air pressure change. The beneficial effects of the utility model are that through the one-to-one correspondence between the plurality of annular detection grooves on the detection chassis and the step-shaped detection steps on the lower surface of the lower pressing plate, the O-shaped rubber sealing ring detection device can be directly adapted to O-shaped rubber sealing rings with different diameters and different wire diameters, and can meet various detection requirements.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment, and in particular to a device for testing the sealing performance of rubber seals. Background Technology

[0002] In industrial production, rubber seals (such as O-rings) are core components ensuring the sealing performance of equipment, and their sealing performance directly affects the operational safety and efficiency of the equipment. For example, in scenarios such as hydraulic systems, pipeline connections, and pressure vessels, leaks in seals can lead to media loss, pressure drops, and even serious consequences such as equipment failure and safety accidents. Therefore, efficient and accurate testing of the sealing performance of rubber seals is an indispensable part of the production process.

[0003] In the existing technology, the sealing performance testing device for rubber seals is usually designed for a single specification, that is, it can only test seals of one size. The testing range is small and it is not convenient for testing seals of different diameters, so its applicability is poor. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a device for testing the sealing performance of rubber seals.

[0005] The technical solution includes a frame, on which a drive rod is provided. The drive rod is a telescopic rod, and a lower pressure plate is detachably provided on the movable part of the drive rod.

[0006] The lower pressure plate is generally disc-shaped and has an air inlet in the middle. A connector is provided on the lower pressure plate at the air inlet, and the connector is connected to an air source through an air pipe.

[0007] The frame is also equipped with a detection chassis, which corresponds to the lower pressure plate. The detection chassis is disc-shaped and has several annular detection grooves on its upper surface.

[0008] A stepped detection step is provided on the lower surface of the lower pressure plate. The detection step extends from the middle of the lower pressure plate to the edge in a stepped manner, and the distance between each detection step and the detection chassis gradually increases from the middle of the lower pressure plate to the edge. Each detection step corresponds to a detection groove on the detection chassis.

[0009] It also includes a pressure detection unit for detecting changes in air pressure.

[0010] Preferably, the air pressure detection unit includes an air pressure detection sensor and a display screen. The air pressure detection sensor is fixed in the middle of the lower pressure plate, and the display screen is fixed on the frame. The air pressure detection sensor is electrically connected to the display screen.

[0011] Preferably, the outer periphery of the detection chassis is fixedly provided with an upwardly extending annular sidewall, the upper surface of the sidewall is provided with a sealing strip, and a sealing groove is provided in the edge area of ​​the lower pressure plate. When the lower pressure plate and the detection chassis are combined, the sealing strip is inserted into the sealing groove.

[0012] Preferably, an exhaust hole is provided on the side wall, and an exhaust pipe is detachably provided at the exhaust hole;

[0013] A water tank is located on one side of the frame. The tank body is made of transparent material. One end of the exhaust pipe is inserted into the water tank, and the lower end of the exhaust pipe is below the horizontal plane.

[0014] Preferably, a start button is provided at the lower front of the frame, and the start button is a two-hand button;

[0015] An emergency stop switch is provided on the rack located between the start buttons.

[0016] The beneficial effects of the technical solution provided by this utility model embodiment are: by detecting that multiple annular detection grooves on the chassis correspond one-to-one with the stepped detection steps on the lower surface of the pressure plate, O-rings of different diameters and wire diameters can be directly adapted to meet various detection needs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present utility model. Figure 2 .

[0019] Figure 3 This is a schematic diagram of the internal structure of the frame in an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the lower pressure plate structure according to an embodiment of the present utility model.

[0021] Figure 5 This is a schematic diagram of the detection chassis according to an embodiment of the present utility model.

[0022] The attached diagram is labeled as follows: 1. Frame; 2. Drive rod; 3. Lower pressure plate; 4. Air pipe; 5. Detection chassis; 6. Detection groove; 7. Detection step; 8. Display screen; 9. Side wall; 10. Sealing strip; 11. Sealing groove; 12. Exhaust pipe; 13. Water tank; 14. Start button. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only for explaining this utility model and are not intended to limit it.

[0024] It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Example 1

[0028] See Figures 1 to 5 This utility model provides a rubber seal sealing performance testing device, including a frame 1, a drive rod 2 is provided on the frame 1, the drive rod 2 is a telescopic rod, and a lower pressure plate 3 is detachably provided on the movable part of the drive rod 2. The power source of the telescopic rod can be hydraulic, pneumatic or electric push rod.

[0029] The lower pressure plate 3 is generally disc-shaped and has an air inlet in the middle. A connector is provided on the lower pressure plate 3 at the air inlet, and the connector is connected to the air source through the air pipe 4.

[0030] The frame 1 is also equipped with a detection chassis 5, which corresponds to the lower pressure plate 3. The detection chassis 5 is disc-shaped and has several annular detection grooves 6 on its upper surface.

[0031] A stepped detection step 7 is provided on the lower surface of the lower pressure plate 3. The detection step 7 extends from the middle of the lower pressure plate 3 to the edge in a stepped manner, and the distance between each detection step 7 and the detection chassis 5 gradually increases from the middle of the lower pressure plate 3 to the edge. Each detection step 7 corresponds to a detection groove 6 on the detection chassis 5.

[0032] The low step in the middle fits the small-diameter sealing ring, while the high step at the edge fits the large-diameter sealing ring. This ensures that sealing rings of different specifications are stably compressed, forming a closed testing space before inflation and testing. The height difference of the stepped testing steps 7 matches the sealing rings of different diameters, avoiding the problem of the traditional flat pressure plate 3 not compressing the small-diameter sealing ring tightly and over-compressing the large-diameter sealing ring. This ensures that each type of sealing ring is uniformly compressed, improving testing accuracy.

[0033] It also includes a pressure detection unit for detecting changes in air pressure.

[0034] According to the specifications of the rubber sealing ring to be tested, select the appropriate annular testing groove 6 on the testing chassis 5, put the sealing ring into the testing groove 6, and ensure that the sealing ring fits against the inner wall of the testing groove 6.

[0035] Start the drive rod 2, causing the movable part to move the lower pressure plate 3 downwards until the lower pressure plate 3 presses the sealing ring tightly. At this time, the lower pressure plate 3, the sealing ring, and the detection chassis 5 together form a closed detection chamber. Air is injected into the detection chamber through the air pipe 4 connector and air inlet to a preset pressure, such as 0.4MPa. After the air source is turned off, the air pressure change in the detection chamber is monitored by the air pressure detection unit in the middle of the lower pressure plate 3. If there is no significant drop in air pressure within a preset time, such as 30 seconds, it indicates that the sealing ring is qualified; if the air pressure drops beyond the threshold, it is determined that there is a leak in the sealing ring.

[0036] After the test is completed, the drive rod 2 drives the lower pressure plate 3 to rise and reset, and the sealing ring is removed, completing one test.

[0037] The several annular testing grooves 6 on the testing chassis 5 can be directly matched with sealing rings of different outer diameters, and the testing of sealing rings of various specifications can be completed without changing the tooling, thus improving the testing efficiency.

[0038] The sealing ring is stably compressed by the cooperation of the lower pressure plate 3 and the detection groove 6. Combined with the air pressure detection unit to monitor the air pressure change in the closed cavity in real time, the sealing performance of the sealing ring can be directly reflected, avoiding false detection caused by human judgment error.

[0039] The air pressure detection unit includes an air pressure detection sensor and a display screen 8. The air pressure detection sensor is fixed in the middle of the lower pressure plate 3, and the display screen 8 is fixed on the frame 1. The air pressure detection sensor and the display screen 8 are electrically connected.

[0040] Inflate the detection chamber to a preset pressure, such as 0.4 MPa, through the air supply via the air pipe connector 4 and the air inlet. Then, shut off the air supply. The display screen 8 shows the pressure value inside the chamber fed back by the air pressure detection sensor in real time. Observe the pressure change within a preset time, such as 30 seconds. If the pressure drop is ≤0.02 MPa, the sealing ring is deemed to be sealed successfully. If the pressure drop exceeds the threshold, a leak is deemed to exist.

[0041] The outer periphery of the detection chassis 5 is fixed with an upwardly extending annular sidewall 9. A sealing strip 10 is provided on the upper surface of the sidewall 9, and a sealing groove 12 is provided in the edge area of ​​the lower pressure plate 3. When the lower pressure plate 3 and the detection chassis 5 are combined, the sealing strip 10 is inserted into the sealing groove 12.

[0042] An exhaust hole is provided on the side wall 9, and an exhaust pipe 12 is detachably installed at the exhaust hole;

[0043] A water tank 13 is installed on one side of the frame 1. The body of the water tank 13 is made of transparent material. One end of the exhaust pipe 12 is inserted into the water tank 13, and the lower end of the exhaust pipe 12 is below the horizontal plane.

[0044] Inflate the detection chamber to the preset pressure, such as 0.4 MPa, and then turn off the air supply;

[0045] Observe the display screen 8 of the air pressure detection unit. If the pressure drops, simultaneously observe whether bubbles are continuously emerging from the vent pipe 12 inside the water tank 13.

[0046] The presence of air bubbles indicates a leak in the sealing ring, allowing gas to enter water tank 13 through the vent and form air bubbles.

[0047] No bubbles: If the pressure drops but there are no bubbles, it may be due to an error in the air pressure detection unit or a slight leak in the sealing structure, which requires further investigation.

[0048] Result determination:

[0049] If the pressure is stable and there are no air bubbles, the sealing ring is deemed qualified.

[0050] If the pressure drops and air bubbles are present, the sealing ring is deemed defective.

[0051] If the pressure drops but there are no bubbles, the test needs to be repeated or the seal needs to be replaced and the test repeated.

[0052] Dual detection verification:

[0053] Air pressure testing: Quantitatively assesses sealing performance by measuring pressure changes;

[0054] Bubble detection: Visualize bubbles to intuitively confirm whether there is a leak. The two detection methods verify each other and reduce the false judgment rate.

[0055] The transparent water tank 13 and the immersion exhaust pipe 12 design allow operators to directly observe the bubble generation and quickly determine whether the sealing ring is leaking. Moreover, the water tank 13 and the exhaust pipe 12 have a simple structure and do not require complex electronic control components, thus reducing manufacturing costs.

[0056] A start button 14 is located at the lower front of the rack 1. The start button 14 is a two-hand button.

[0057] An emergency stop switch is installed on the frame 1 located between the two buttons.

[0058] The operator presses the two-hand buttons at the lower front of the frame 1 simultaneously with both hands. The drive rod 2 drives the lower pressure plate 3 to descend, avoiding accidental start-up of the equipment due to accidental touch or single-handed operation, and reducing the risk of pinching injury. The operator continues to press the buttons with both hands until the lower pressure plate 3 completely presses the sealing ring. At this time, the system automatically inflates and starts testing. If an emergency stop is required during the testing process, the emergency stop switch between the two-hand buttons can be pressed immediately.

[0059] When using this utility model, according to the specifications of the rubber sealing ring to be tested, select the appropriate annular testing groove 6 on the testing chassis 5, put the sealing ring into the testing groove 6, and ensure that the sealing ring fits against the inner wall of the testing groove 6.

[0060] Start the drive rod 2, causing the movable part to move the lower pressure plate 3 downwards until the lower pressure plate 3 presses the sealing ring tightly. At this time, the lower pressure plate 3, the sealing ring, and the detection chassis 5 together form a closed detection chamber. Air is injected into the detection chamber through the air pipe 4 connector and air inlet to a preset pressure, such as 0.4MPa. After the air source is turned off, the air pressure change in the detection chamber is monitored by the air pressure detection unit in the middle of the lower pressure plate 3. If there is no significant drop in air pressure within a preset time, such as 30 seconds, it indicates that the sealing ring is qualified; if the air pressure drops beyond the threshold, it is determined that there is a leak in the sealing ring.

[0061] After the test is completed, the drive rod 2 drives the lower pressure plate 3 to rise and reset, and the sealing ring is removed, completing one test.

[0062] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for testing the sealing performance of rubber seals, characterized in that, Includes a frame (1), on which a drive rod (2) is provided. The drive rod (2) is a telescopic rod, and a lower pressure plate (3) is detachably provided on the movable part of the drive rod (2). The lower pressure plate (3) is generally disc-shaped and has an air inlet in the middle. A connector is provided on the lower pressure plate (3) located at the air inlet, and the connector is connected to the air source through an air pipe (4). The frame (1) is also provided with a detection chassis (5), which corresponds to the lower pressure plate (3). The detection chassis (5) is disc-shaped and has several annular detection grooves (6) on its upper surface. A stepped detection step (7) is provided on the lower surface of the lower pressure plate (3). The detection step (7) extends from the middle of the lower pressure plate (3) to the edge in a stepped manner, and the distance between each detection step (7) and the detection chassis (5) gradually increases from the middle of the lower pressure plate (3) to the edge. Each detection step (7) corresponds to a detection groove (6) on the detection chassis (5). It also includes a pressure detection unit for detecting changes in air pressure.

2. The rubber seal sealing performance testing device according to claim 1, characterized in that, The air pressure detection unit includes an air pressure detection sensor and a display screen (8). The air pressure detection sensor is fixed in the middle of the lower pressure plate (3), and the display screen (8) is fixed on the frame (1). The air pressure detection sensor is electrically connected to the display screen (8).

3. The rubber seal sealing performance testing device according to claim 1, characterized in that, The outer periphery of the detection chassis (5) is fixed with an upwardly extending annular sidewall (9). A sealing strip (10) is provided on the upper surface of the sidewall (9). A sealing groove (11) is provided in the edge area of ​​the lower pressure plate (3). When the lower pressure plate (3) and the detection chassis (5) are combined, the sealing strip (10) is inserted into the sealing groove (11).

4. The rubber seal sealing performance testing device according to claim 3, characterized in that, An exhaust hole is provided on the side wall (9), and an exhaust pipe (12) is detachably provided at the exhaust hole. A water tank (13) is provided on one side of the frame (1). The body of the water tank (13) is made of transparent material. One end of the exhaust pipe (12) is inserted into the water tank (13), and the lower end of the exhaust pipe (12) is below the horizontal plane.

5. The rubber seal sealing performance testing device according to claim 1, characterized in that, A start button (14) is provided at the lower front of the frame (1), and the start button (14) is a two-hand button; An emergency stop switch is provided on the rack (1) located between the start buttons (14).

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