Air tightness detection device

Abstract

The invention discloses an air tightness detection device, comprising a frame, a test seat is provided on the frame, a vent hole is provided on the test seat, a vent end of a workpiece to be tested is tightly fitted with the test seat, a blocking device for blocking the air outlet hole of the workpiece to be tested is also provided on the frame, and a clamping device is also provided on the frame for pressing the workpiece to be tested onto the test seat to ensure that the vent end and the test seat are tightly fitted; the clamping device presses the workpiece to be tested onto the test seat, and the blocking device blocks the air outlet hole of the workpiece to be tested, so that the inside of the workpiece to be tested is sealed with the outside, gas is introduced into the workpiece to be tested through the vent hole, and whether there is gas leakage is detected by a leak detection device to complete the detection.

Description

Technical Field

[0001] The invention relates to an airtightness detection device. Background Art

[0002] In the prior art, when performing air tightness testing, different air tightness testing equipment is required for different workpieces. The versatility of the air tightness testing equipment is poor. In addition, when clamping the workpiece to be tested, the fixture needs to be adjusted in order to achieve reliable clamping of the workpiece to be tested, which brings operational inconvenience to the air tightness test. Summary of the invention

[0003] In order to make up for the above deficiencies, the present invention provides an airtightness detection device which can effectively improve the airtightness detection efficiency and is convenient and reliable to operate.

[0004] The technical solution of the present invention is: an air tightness detection device, including a frame, a test seat is provided on the frame, a vent is provided on the test seat, the vent end of the workpiece to be tested is tightly fitted with the test seat, the frame is also provided with a blocking device for blocking the air outlet of the workpiece to be tested, and the frame is also provided with a clamping device for pressing the workpiece to be tested against the test seat to ensure that the vent end and the test seat are tightly fitted.

[0005] As a preferred technical solution, the clamping device includes a lifting plate, on which is mounted a clamping head that presses against the upper surface of the workpiece to be measured, and on the frame is mounted a lifting drive cylinder that drives the lifting plate to move up and down.

[0006] As a preferred technical solution, the air outlet plugging device comprises a plugging cylinder, and a plugging head for plugging the air outlet is fixedly mounted on the piston rod of the plugging cylinder.

[0007] As a preferred technical solution, a sealing gasket located between the test seat and the ventilation end of the workpiece to be tested is fixedly mounted on the test seat.

[0008] As a preferred technical solution, guide blocks are provided on two opposite sides of the lifting plate, and guide grooves located below the lifting plate are respectively opened on the guide blocks, and a clamping plate is movably installed between the two guide grooves, and a guide hole is provided on the clamping plate, and a tensioning pin is movably installed in the guide hole, and a limiting through hole cooperating with the tensioning pin is provided on the lifting plate, and a supporting spring is provided between the tensioning pin and the guide hole to enable the tensioning pin to be pushed into the limiting through hole, a pressing plate is provided on the lifting plate, and a downward driving mechanism is provided between the pressing plate and the lifting plate, and a clamping column cooperating with the limiting through hole is provided on the pressing plate, and the diameter of the clamping column is smaller than the diameter of the limiting through hole, and the clamping head is installed on the clamping plate.

[0009] As a preferred technical solution, the downward pressing driving mechanism includes a cylinder, a cylinder body of the cylinder is fixedly mounted on the lifting plate, a piston rod of the cylinder is fixedly mounted with a pull rod, and a lower end of the pull rod is fixedly mounted on the pressure plate.

[0010] As a preferred technical solution, the clamping head includes a guide cylinder installed on the clamping plate, a pressure rod is sleeved inside the guide cylinder and can move up and down along the guide cylinder, a pressure head is installed at the lower end of the pressure rod, and a buffer spring is sleeved outside the pressure rod, the upper end of which rests against the guide cylinder and the lower end of which rests against the pressure head.

[0011] Due to the adoption of the above technical scheme, an air tightness detection device includes a frame, a test seat is provided on the frame, a vent is provided on the test seat, a vent end of a workpiece to be tested is tightly fitted with the test seat, a sealing device for sealing the vent of the workpiece to be tested is also provided on the frame, and a clamping device for pressing the workpiece to be tested against the test seat to ensure that the vent end and the test seat are tightly fitted; the clamping device presses the workpiece to be tested against the test seat, and the sealing device seals the vent of the workpiece to be tested, so that the inside of the workpiece to be tested is sealed from the outside, gas is introduced into the workpiece to be tested through the vent, and whether there is gas leakage is detected by a leak detection device to complete the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0014] Figure 2 yes Figure 1 A partial enlarged view of point I in the middle;

[0015] Figure 3 yes Figure 2 A partial enlarged view of point II in the middle. DETAILED DESCRIPTION

[0016] like Figures 1 to 3As shown, an air tightness detection device includes a frame 1, a test seat 2 is provided on the frame 1, a vent hole is provided on the test seat 2, the vent end of the workpiece to be tested 3 is tightly fitted with the test seat 2, and a blocking device for blocking the air outlet 4 of the workpiece to be tested is also provided on the frame 1. The frame 1 is also provided with a clamping device for pressing the workpiece to be tested against the test seat 2 to ensure that the vent end and the test seat are tightly fitted. The clamping device presses the workpiece to be tested against the test seat 2, and the sealing device blocks the air outlet of the workpiece to be tested, so that the inside of the workpiece to be tested is sealed with the outside, gas is introduced into the workpiece to be tested through the vent hole, and the leak detection device is used to detect whether there is gas leakage, and the detection is completed.

[0017] like Figure 1 and Figure 2 As shown, the clamping device includes a lifting plate 5, on which a clamping head is mounted to clamp the upper surface of the workpiece 3 to be measured, and a lifting drive cylinder 25 is mounted on the frame to drive the lifting plate to move up and down. The lifting drive cylinder drives the lifting plate to move downward so that the clamping head is pressed against the upper surface of the workpiece to be measured.

[0018] like Figure 1 As shown, the outlet plugging device includes a plugging cylinder 6, and a plugging head 7 plugging the outlet is fixedly mounted on the piston rod of the plugging cylinder 6. The plugging cylinder drives the plugging head to plug the outlet to achieve sealing of the outlet.

[0019] like Figure 1 As shown, a sealing gasket 8 is fixedly mounted on the test seat 2 and is located between the test seat 2 and the ventilation end of the workpiece 3 to be tested. In order to ensure a sealed connection between the test seat and the workpiece to be tested, the sealing gasket is provided, and the sealing gasket is an elastic sealing gasket.

[0020] like Figure 1 , Figure 2 and Figure 3As shown, guide blocks 9 are provided on the two opposite sides of the lifting plate 5, and guide grooves 10 arranged opposite to each other and located below the lifting plate are respectively opened on the guide blocks 9, and a clamping plate 12 is movably installed between the two guide grooves 10, and a guide hole 13 is provided on the clamping plate 12, and a tensioning pin 14 is movably installed in the guide hole 13, and a limiting through hole 15 cooperating with the tensioning pin 14 is provided on the lifting plate 5, and a supporting spring 16 is provided between the tensioning pin 14 and the guide hole 13 to enable the tensioning pin 14 to push into the limiting through hole 15, and a pressing plate 17 is provided on the lifting plate 5, and a downward driving mechanism is provided between the pressing plate 17 and the lifting plate 5, and a clamping column 18 cooperating with the limiting through hole 15 is provided on the pressing plate 17, and the diameter of the clamping column 18 is smaller than the diameter of the limiting through hole 15, and the clamping head is installed on the clamping plate 12. In this embodiment, the inner wall of the guide hole is provided with an annular guide groove 26, the push pin is provided with a retaining ring 27 that cooperates with the annular guide groove, the support spring 16 is arranged in the annular guide groove 26, and the upper end of the support spring abuts against the lower surface of the retaining ring. The setting of the guide groove allows the clamping plate to move relative to the guide groove, so that the clamping plate can be replaced, and the push pin is inserted into the limiting through hole, so that the movement of the clamping plate relative to the guide groove can be blocked, so that the position of the clamping plate relative to the lifting plate is fixed.

[0021] like Figure 1 As shown, the downward pressing driving mechanism includes a cylinder 19, the cylinder body of the cylinder 19 is fixedly mounted on the lifting plate 5, the piston rod of the cylinder is fixedly mounted with a pull rod 20, and the lower end of the pull rod 20 is fixedly mounted on the pressing plate 17. The cylinder drives the pressing plate to move downward, thereby driving the pressing column to press the push pin downward, so that the push pin is no longer inserted into the limit through hole, so that the push pin no longer blocks the movement of the pressing plate relative to the guide groove, so that the pressing plate can be pulled out of the guide groove, so that the pressing plate can be replaced, so that for different workpieces to be measured, the position and number of the pressing head can be more matched with the workpiece to be measured by replacing the pressing plate.

[0022] like Figure 2As shown, the clamping head includes a guide cylinder 21 installed on the clamping plate, the guide cylinder 21 is internally provided with a pressure rod 22 which can move up and down along the guide cylinder, the lower end of the pressure rod 22 is provided with a pressure head 23, and the pressure rod 22 is externally provided with a buffer spring 24 whose upper end abuts against the guide cylinder 21 and whose lower end abuts against the pressure head 23. In this embodiment, the outer diameters of the pressure head and the guide cylinder are both larger than the outer diameter of the pressure rod, so that after the buffer spring is sleeved on the pressure rod, the lower end of the buffer spring acts on the upper surface of the pressure head, and the upper end of the buffer spring acts on the lower surface of the guide cylinder. Since the height positions of the contact points between the clamping head and the workpiece to be measured are different, such a structure is adopted to ensure that each clamping head can generate effective pressure on the workpiece to be measured, the pressure rod can move up and down relative to the guide cylinder, and the elastic force of the compressed buffer spring can press the pressure rod downward, so that the pressure head is pressed against the workpiece to be measured.

[0023] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An airtightness detection device, characterized in that: The machine comprises a frame, a test seat is provided on the frame, a vent hole is provided on the test seat, a vent end of the workpiece to be tested is closely fitted with the test seat, a blocking device for blocking the vent hole of the workpiece to be tested is also provided on the frame, and a pressing device for pressing the workpiece to be tested against the test seat to ensure that the vent end and the test seat are closely fitted; The clamping device comprises a lifting plate, a clamping head is mounted on the lifting plate and is pressed against the upper surface of the workpiece to be measured, and a lifting driving cylinder is mounted on the frame to drive the lifting plate to move up and down; The cam is provided with a plurality of guide rails, each of which is provided with a plurality of guide rails, and the guide rails are provided with a plurality of guide rails respectively disposed on the plurality of guide rails and a plurality of guide rails are provided on the plurality of guide rails.

2. The airtightness detection device according to claim 1, characterized in that: A sealing gasket located between the test seat and the ventilation end of the workpiece to be tested is fixedly mounted on the test seat.

3. The airtightness detection device according to claim 1, characterized in that: The downward pressing driving mechanism comprises a cylinder, a cylinder body of the cylinder is fixedly mounted on the lifting plate, a piston rod of the cylinder is fixedly mounted with a pull rod, and a lower end of the pull rod is fixedly mounted on the pressing plate.

4. The airtightness detection device according to claim 1, characterized in that: The clamping head includes a guide cylinder installed on the clamping plate, a pressure rod which can move up and down along the guide cylinder is sleeved in the guide cylinder, a pressure head is installed at the lower end of the pressure rod, and a buffer spring is sleeved outside the pressure rod, the upper end of which abuts against the guide cylinder and the lower end of which abuts against the pressure head.

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