An air tightness detection device

Abstract

The utility model provides a kind of air tightness detection device.The air tightness detection device includes: the transparent water tank of top fixed installation frame;Rotary installation is on the transparent water tank and is connected with the longitudinal screw rod of frame rotation;Lifting plate is screwed on the longitudinal screw rod;Fixed installation is on the bottom of lifting plate shell;It is installed on the frame top for driving longitudinal screw rod rotation drive mechanism;It is installed on the shell for detecting the air tightness of valve air tightness detection mechanism;It is installed on the bottom of shell for fixing the positioning mechanism of valve.This utility model provides air tightness detection device with different sizes of valve can be carried out air tightness detection, it is easy to locate the air leakage point of detection piece, and it is relatively easy to operate.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and in particular to an airtightness testing device. Background Technology

[0002] Air tightness testing devices determine the airtightness of an object by monitoring changes in air pressure. Their core logic is based on the ideal gas law (PV=nRT). When gas is filled into the object, if a leak exists, the internal air pressure will decrease over time. This change is captured by a high-precision sensor, allowing for the quantification of the leakage rate. Air tightness testing devices are required when performing air tightness testing on valves.

[0003] However, existing airtightness testing devices often have difficulty locating the leak point of the test piece, which is quite inconvenient.

[0004] Therefore, it is necessary to provide an airtightness testing device to solve the above-mentioned technical problems. Utility Model Content

[0005] To address the technical problem that existing airtightness testing devices are not convenient for locating leak points in the tested components, this utility model provides an airtightness testing device.

[0006] The airtightness testing device provided by this utility model includes: a transparent water tank with a frame fixedly mounted on the top; a longitudinal screw rotatably mounted on the transparent water tank and rotatably connected to the frame; a lifting plate threaded onto the longitudinal screw; a housing fixedly mounted on the bottom of the lifting plate; a drive mechanism mounted on the top of the frame for driving the longitudinal screw to rotate; an airtightness testing mechanism mounted on the housing for testing the airtightness of a valve; and a positioning mechanism mounted on the bottom of the housing for fixing the valve.

[0007] Preferably, the drive mechanism includes: a servo motor fixedly mounted on the top of the frame; a double-groove synchronous pulley respectively fixedly sleeved on the output shaft of the servo motor and on the longitudinal screw; and a synchronous belt sleeved on the double-groove synchronous pulley.

[0008] Preferably, a limit rod is fixedly installed on the inner wall of the housing, and a strip-shaped opening is provided at the bottom of the housing.

[0009] Preferably, the airtightness testing mechanism includes: a dual-axis motor fixedly mounted on the inner wall of the housing; a transverse screw mounted on the output shaft of the dual-axis motor via a coupling and rotatably connected to the inner wall of the housing; a sliding plate threaded onto the transverse screw and slidably connected to the limiting rod; a pressure sensor mounted on the sliding plate; a clamping plate mounted on the pressure sensor; an annular sealing ring mounted on the clamping plate; an air pump mounted on the housing; a pressurizing pipe mounted on the air pump and connected to the clamping plate; and a pressure sensor and a one-way valve mounted on the pressurizing pipe.

[0010] Preferably, the positioning mechanism includes: an electric cylinder fixedly installed at the bottom of the housing; an arc-shaped positioning seat fixedly installed on the output rod of the electric cylinder; an arc-shaped fastener disposed on the arc-shaped positioning seat; and a wing bolt disposed on the arc-shaped fastener and threadedly connected to the arc-shaped positioning seat.

[0011] Preferably, the top of the transparent water tank has a rectangular opening, and a controller is provided on one side of the frame.

[0012] Preferably, the transparent water tank is provided with a drain pipe, and the drain pipe is provided with a drain valve.

[0013] Compared with related technologies, the airtightness testing device provided by this utility model has the following advantages:

[0014] This utility model provides an airtightness testing device. A drive motor rotates multiple longitudinal screws, which in turn move a lifting plate and a housing downwards. The housing indirectly moves a valve downwards, immersing the valve in a transparent water tank. Once the valve is in the tank, small air bubbles form around the leak point, allowing operators to easily pinpoint it. The airtightness of the valve can be tested using the airtightness testing mechanism. A positioning mechanism secures the valve to the bottom of the housing. A servo motor, multiple double-groove synchronous pulleys, and multiple synchronous belts drive the longitudinal screws. A limit rod guides and limits the sliding plate. A dual-axis motor drives two transverse screws, which in turn move two sliding plates, two clamping plates, and two annular sealing rings closer together. The valve is clamped and fixed by two annular sealing rings to seal both ends. Multiple pressure sensors monitor the pressure applied to the valve by the two clamping plates. The controller starts and stops the dual-axis motor based on the pressure monitoring data. An air pump and pressurization pipe inject gas into the valve to increase the air pressure inside. The air pressure sensor monitors the air pressure inside the valve, and the valve's airtightness is determined by observing the decrease in air pressure after a certain period of time. An electric cylinder moves the valve up and down. The valve is clamped and fixed by an arc-shaped positioning seat, arc-shaped fastener, and wing bolts. A rectangular opening allows the valve to extend into the transparent water tank. The controller operates the device, and the drain pipe and drain valve drain the water from the transparent water tank. Attached Figure Description

[0015] Figure 1 A schematic diagram of a preferred embodiment of the airtightness testing device provided by this utility model;

[0016] Figure 2 for Figure 1 A side sectional view of the positioning mechanism;

[0017] Figure 3 for Figure 1 An enlarged schematic diagram of part A shown in the image;

[0018] Figure 4 for Figure 1 The enlarged schematic diagram of part B shown in the figure.

[0019] The following components are labeled in the diagram: 1. Transparent water tank; 2. Frame; 3. Longitudinal screw; 4. Lifting plate; 5. Housing; 6. Servo motor; 7. Double-groove synchronous pulley; 8. Limit rod; 9. Strip opening; 10. Dual-axis motor; 11. Transverse screw; 12. Sliding plate; 13. Pressure sensor; 14. Clamping plate; 15. Annular sealing ring; 16. Air pump; 17. Pressurization pipe; 18. Air pressure sensor; 19. One-way valve; 20. Electric cylinder; 21. Arc-shaped positioning seat; 22. Arc-shaped fastener; 23. Wing bolt; 24. Controller. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please refer to the following: Figure 1-4 ,in, Figure 1 A schematic diagram of a preferred embodiment of the airtightness testing device provided by this utility model; Figure 2 for Figure 1 A side sectional view of the positioning mechanism; Figure 3 for Figure 1 An enlarged schematic diagram of part A shown in the image; Figure 4 for Figure 1 The enlarged schematic diagram of part B shown in the figure illustrates the airtightness testing device, which includes: a transparent water tank 1 with a frame 2 fixedly mounted on top; a longitudinal screw 3 rotatably mounted on the transparent water tank 1 and rotatably connected to the frame 2; a lifting plate 4 threaded onto the longitudinal screw 3; a housing 5 fixedly mounted on the bottom of the lifting plate 4; a drive mechanism mounted on the top of the frame 2 for driving the longitudinal screw 3 to rotate; an airtightness testing mechanism mounted on the housing 5 for testing the airtightness of the valve; and a positioning mechanism mounted on the bottom of the housing 5 for fixing the valve. The device utilizes a drive motor to rotate multiple longitudinal screws 3, which in turn causes the lifting plate 4 and housing 5 to move downwards. The housing 5 indirectly causes the valve to move downwards, thus immersing the valve in the water inside the transparent water tank 1. Once the valve is inside the water, small air bubbles will form outside the leak point, making it easier for operators to identify the leak. The airtightness of the valve can be tested using the airtightness testing mechanism, and the valve can be fixed to the bottom of the housing 5 using the positioning mechanism.

[0022] The drive mechanism includes: a servo motor 6 fixedly mounted on the top of the frame 2, the servo motor 6 being of model ECMA-C20807RS; a double-groove synchronous pulley 7 fixedly mounted on the output shaft of the servo motor 6 and on the longitudinal screw 3 respectively; and a synchronous belt mounted on the double-groove synchronous pulley 7, which drives the multiple longitudinal screws 3 to rotate through the servo motor 6, the multiple double-groove synchronous pulleys 7, and the multiple synchronous belts.

[0023] A limiting rod 8 is fixedly installed on the inner wall of the housing 5, and a strip-shaped opening 9 is provided at the bottom of the housing 5. The sliding plate 12 can be guided and limited by the limiting rod 8.

[0024] The airtightness testing mechanism includes: a dual-axis motor 10 fixedly installed on the inner wall of the housing 5, the dual-axis motor 10 being model STP-28D300X; a transverse screw 11 mounted on the output shaft of the dual-axis motor 10 via a coupling and rotatably connected to the inner wall of the housing 5; a sliding plate 12 threaded onto the transverse screw 11 and slidably connected to the limiting rod 8; a pressure sensor 13 mounted on the sliding plate 12, the pressure sensor 13 being model LD-F33; a clamping plate 14 mounted on the pressure sensor 13; an annular sealing ring 15 mounted on the clamping plate 14; and an air pump 16 mounted on the housing 5, the air pump 16 being model HIBLOW. HP-20; a pressurization pipe 17 installed on the air pump 16 and connected to the clamping plate 14; a pressure sensor 18 and a one-way valve 19 installed on the pressurization pipe 17. The pressure sensor 18 is a BMP280. The two transverse screws 11 are driven to rotate by the dual-axis motor 10. The rotation of the two transverse screws 11 causes the two sliding plates 12, the two clamping plates 14 and the two annular sealing rings 15 to move closer to each other, thereby clamping and fixing the valve. The two annular sealing rings 15 can seal both ends of the valve. Multiple pressure sensors 13 can monitor the pressure applied to the valve by the two clamping plates 14. The controller 24 controls the start and stop of the dual-axis motor 10 according to the pressure monitoring data. The air pump 16 and the pressurization pipe 17 can inject gas into the valve, thereby increasing the air pressure inside the valve. The air pressure sensor 18 can monitor the air pressure inside the valve. The airtightness of the valve is determined by observing the decrease in air pressure inside the valve after a certain period of time.

[0025] The positioning mechanism includes: an electric cylinder 20 fixedly installed at the bottom of the housing 5; an arc-shaped positioning seat 21 fixedly installed on the output rod of the electric cylinder 20; an arc-shaped fastener 22 provided on the arc-shaped positioning seat 21; and a butterfly bolt 23 provided on the arc-shaped fastener 22 and threadedly connected to the arc-shaped positioning seat 21. The electric cylinder 20 drives the valve to move up and down, and the arc-shaped positioning seat 21, the arc-shaped fastener 22, and the butterfly bolt 23 can clamp and fix the valve.

[0026] The top of the transparent water tank 1 has a rectangular opening, and a controller 24 is provided on one side of the frame 2. The valve can be inserted into the interior of the transparent water tank 1 through the rectangular opening, and the device can be operated and controlled through the controller 24.

[0027] The transparent water tank 1 is equipped with a drain pipe and a drain valve, through which water in the transparent water tank 1 can be discharged.

[0028] The working principle of the airtightness testing device provided by this utility model is as follows:

[0029] The valve to be tested is placed at the bottom of the arc-shaped positioning seat 21, and the arc-shaped fastener 22 is fastened to the bottom of the arc-shaped positioning seat 21. The arc-shaped fastener 22 is fixed to the bottom of the arc-shaped positioning seat 21 by multiple butterfly bolts 23, thereby fixing the valve to be tested at the bottom of the arc-shaped positioning seat 21. The valve is moved up and down by the electric cylinder 20, so that the center positions of both ends of the valve are aligned with one end of the pressure pipe 17. The two transverse screws 11 are rotated by the dual-axis motor 10. The rotation of the two transverse screws 11 causes the two sliding plates 12, two clamping plates 14 and two annular sealing rings 15 to move closer to each other, thereby clamping and fixing the valve. The two annular sealing rings 15 can seal both ends of the valve. Multiple pressure sensors 13 can monitor the pressure applied to the valve by the two clamping plates 14. The controller 24 controls the start and stop of the dual-axis motor 10 according to the pressure monitoring data.

[0030] Air can be injected into the valve through air pump 16 and pressurization pipe 17, thereby increasing the air pressure inside the valve. The air pressure inside the valve can be monitored by air pressure sensor 18. The air tightness of the valve can be determined by observing the drop in air pressure inside the valve after a certain period of time. If the valve is leaking, multiple longitudinal screws 3 are driven to rotate by servo motor 6, multiple double-groove synchronous pulleys 7 and multiple synchronous belts. The rotation of multiple longitudinal screws 3 drives the lifting plate 4 and housing 5 to move downward. The housing 5 indirectly drives the valve to move downward, thereby extending the valve into the water in transparent water tank 1. After the valve enters the water in transparent water tank 1, small bubbles will form outside the leak point, making it easier for the staff to determine the leak point of the valve.

[0031] Compared with related technologies, the airtightness testing device provided by this utility model has the following advantages:

[0032] This invention provides an airtightness testing device. A drive motor rotates multiple longitudinal screws 3, which in turn move a lifting plate 4 and a housing 5 downwards. The housing 5 indirectly moves a valve downwards, immersing the valve in a transparent water tank 1. Once the valve is in the water, small air bubbles form around the leak point, making it easy for operators to pinpoint the leak. The airtightness of the valve can be tested using the airtightness testing mechanism. A positioning mechanism secures the valve to the bottom of the housing 5. A servo motor 6, multiple double-groove synchronous pulleys 7, and multiple synchronous belts drive the longitudinal screws 3 to rotate. A limiting rod 8 guides and limits the sliding plate 12. A dual-axis motor 10 drives two transverse screws 11 to rotate, causing the two sliding plates 12, two clamping plates 14, and two annular sealing rings 15 to move closer together. The valve is clamped and fixed, and two annular sealing rings 15 can seal both ends of the valve. Multiple pressure sensors 13 can monitor the pressure applied to the valve by the two clamping plates 14. The controller 24 controls the start and stop of the dual-axis motor 10 based on the pressure monitoring data. Air pump 16 and pressurization pipe 17 can inject gas into the valve to increase the air pressure inside the valve. The air pressure sensor 18 can monitor the air pressure inside the valve. The airtightness of the valve is determined by observing the drop in air pressure inside the valve after a certain period of time. The electric cylinder 20 drives the valve to move up and down. The valve can be clamped and fixed by the arc-shaped positioning seat 21, arc-shaped fastener 22 and butterfly bolt 23. The rectangular opening allows the valve to be inserted into the transparent water tank 1. The controller 24 can operate and control the device. The water in the transparent water tank 1 can be discharged through the drain pipe and drain valve.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An airtightness testing device, characterized in that, include: A transparent water tank with a frame fixed to the top; A longitudinal screw rotatably mounted on the transparent water tank and rotatably connected to the frame; A lifting plate threaded onto the longitudinal screw; A housing fixedly installed at the bottom of the lifting plate; A drive mechanism mounted on top of the frame for driving the longitudinal screw to rotate; An airtightness testing mechanism installed on the housing for testing the airtightness of the valve; A positioning mechanism installed at the bottom of the housing for fixing the valve.

2. The airtightness testing device according to claim 1, characterized in that, The drive mechanism includes: A servo motor is fixedly mounted on the top of the frame; Double-groove synchronous pulleys are respectively fixedly sleeved on the output shaft of the servo motor and on the longitudinal screw; A timing belt fitted onto the double-groove timing pulley.

3. The airtightness testing device according to claim 1, characterized in that, A limit rod is fixedly installed on the inner wall of the housing, and a strip-shaped opening is provided at the bottom of the housing.

4. The airtightness testing device according to claim 3, characterized in that, The airtightness testing mechanism includes: A dual-axis motor fixedly installed on the inner wall of the housing; A transverse screw is mounted on the output shaft of the dual-shaft motor via a coupling and is rotatably connected to the inner wall of the housing. A sliding plate threaded onto the transverse screw and slidably connected to the limiting rod; A pressure sensor is mounted on the sliding plate; A clamping plate mounted on the pressure sensor; An annular sealing ring is provided on the clamping plate; An air pump mounted on the housing; A pressurization pipe installed on the air pump and connected to the clamping plate; A pressure sensor and a one-way valve are installed on the pressurization pipe.

5. The airtightness testing device according to claim 1, characterized in that, The positioning mechanism includes: An electric cylinder fixedly installed at the bottom of the housing; An arc-shaped positioning seat is fixedly installed on the output rod of the electric cylinder; Arc-shaped fasteners are installed on the arc-shaped positioning seat; A wing bolt is disposed on the arc-shaped fastener and threadedly connected to the arc-shaped positioning seat.

6. The airtightness testing device according to claim 1, characterized in that, The transparent water tank has a rectangular opening at the top, and a controller is provided on one side of the frame.

7. The airtightness testing device according to claim 1, characterized in that, The transparent water tank is equipped with a drain pipe, and the drain pipe is equipped with a drain valve.

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