Leakage testing mechanism
By designing a leak testing mechanism for removable pad plates and telescopic cylinders, the problems of unstable parts clamping and specification diversity detection in the prior art are solved, and efficient airtightness detection of parts of different specifications are achieved, and detection efficiency is improved. and convenience.
Patent Information
- Application Number
- CN202310692103.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-13
- Publication Date
- 2024-12-13
AI Technical Summary
The existing water-soaked bubble detection method has problems such as unstable parts clamping and inability to detect various specifications, which affects the accuracy and efficiency of airtightness detection.
A leakage testing mechanism is designed, using removable pads and telescopic cylinders. By adjusting the pads and cylinders, the stable limit and detection of parts of different specifications is achieved. Combined with the 90-degree angle cylinder and the intake passage, the blind holes and inlets are ensured. The sealed connection of the air passages facilitates visual inspection and parts pick-up and placement.
It realizes efficient inspection of parts of different specifications, avoids misjudgment of inspection results, improves inspection efficiency and convenience, and saves production costs.
Smart Images
Figure CN119124478A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of air tightness detection, and in particular to a leakage testing mechanism. Background Art
[0002] The methods of air tightness testing include ultrasonic testing, infrared testing, pressure testing, immersion air tightness testing and many other methods. Among them, the immersion bubble detection method is the most direct and effective method to detect air tightness. The parts to be tested for air tightness are clamped and placed in water, and then the bubbles are observed by naked eyes or with the combination of modern optics and image processing technology to identify the air tightness of the parts.
[0003] Currently, the most commonly used water immersion bubble detection method is to identify the air tightness of the parts through visual inspection after the parts are clamped. However, the instability of the parts clamping can easily affect the identification of visual inspection, and it cannot be used to detect parts of various specifications. Summary of the invention
[0004] The main purpose of the present invention is to provide a leakage testing mechanism, which can not only achieve stable positioning of the parts to be tested, but also detect parts to be tested of different specifications and sizes, and is also convenient for visual detection and judgment of air tightness and the placement of the parts to be tested, thereby improving the efficiency of detection and saving production costs.
[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a leakage testing mechanism, comprising: a substrate, a carrier plate for mounting a part to be tested, and a box body that can be injected with liquid, the carrier plate is mounted on the upper surface of the substrate, and has at least two specifications of parts to be tested, a plurality of blind holes are opened on the side surface of the part to be tested of each specification, a plurality of through holes corresponding to the blind holes are opened on the upper surface of the part to be tested, the through holes that pass through from top to bottom are arranged adjacent to the bottom of the corresponding blind holes, the lower surface of the part to be tested is overlapped and connected with the upper surface of the carrier plate, and the distances between the blind holes and the lower surface of the part to be tested are different for parts to be tested of different specifications, and a pad is detachably provided on the upper surface of the carrier plate, and the upper surface of the pad can be overlapped and connected with the lower surface of the part to be tested; The outer side of the carrier plate is provided with a plurality of telescopic cylinders corresponding to the blind holes, the piston rod of each telescopic cylinder is coaxially arranged with the corresponding blind hole, an air inlet head is sleeved on the piston rod of the telescopic cylinder, and an air inlet channel coaxially arranged with the blind hole is opened at one end of the air inlet head facing the carrier plate, when the piston rod of the telescopic cylinder is in an extended state, one end of the air inlet channel is sealed and connected with the blind hole, and the other end is connected with the air source through a pipeline; At least two 90-degree rotating cylinders are installed on the lower surface of the carrier plate, the piston rods of the 90-degree rotating cylinders pass upward through the carrier plate and are installed with a rotating block, one end of the rotating block is connected to the piston rod of the 90-degree rotating cylinder and can rotate with its piston rod, and a pressure head is installed on the other end of the rotating block. When the piston rod of the 90-degree rotating cylinder is in a retracted state, the lower surface of the pressure head is pressed and contacted with the upper surface of the part to be measured, and when the piston rod of the 90-degree rotating cylinder is in an extended state, the pressure head is arranged away from the part to be measured after rotating 90° with the piston rod of the 90-degree rotating cylinder.
[0006] The further improved scheme in the above technical scheme is as follows: 1. In the above scheme, the carrier plate with the part to be tested mounted thereon is placed in the box along with the base plate, and the liquid level of the liquid is higher than the upper surface of the part to be tested.
[0007] 2. In the above solution, a water outlet is provided on the side wall of the box.
[0008] 3. In the above solution, at least two handles are installed on the upper surface of the substrate.
[0009] 4. In the above solution, the telescopic cylinder is mounted on the upper surface of the base plate through a mounting seat.
[0010] 5. In the above solution, blind holes are provided on the four side surfaces of the part to be tested.
[0011] 6. In the above solution, the area on the upper surface of the part to be tested where the pressure head can be pressed and contacted is arranged away from the through hole.
[0012] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The leakage testing mechanism of the present invention has at least two specifications of parts to be tested, a plurality of blind holes are opened on the side surface of each specification of the parts to be tested, a plurality of through holes corresponding to the blind holes are opened on the upper surface of the parts to be tested, the through holes that penetrate up and down are arranged adjacent to the bottom of the corresponding blind holes, the lower surface of the parts to be tested is overlapped and connected with the upper surface of the carrier plate, and the distances between the blind holes and the lower surface of the parts to be tested are different on the parts to be tested of different specifications, a pad is detachably arranged on the upper surface of the carrier plate, and the upper surface of the pad can be overlapped and connected with the lower surface of the parts to be tested, and a plurality of telescopic cylinders corresponding to the blind holes are arranged on the outer side of the carrier plate, the piston rod of each telescopic cylinder is coaxially arranged with the corresponding blind hole, and the piston of the telescopic cylinder An air inlet head is mounted on the rod, and an air inlet channel is provided at one end of the air inlet head facing the carrier plate and arranged coaxially with the blind hole. When the piston rod of the telescopic cylinder is in an extended state, one end of the air inlet channel is sealed and connected to the blind hole, and the other end is connected to the air source through a pipeline. Through the extension and retraction of the telescopic cylinder, the blind hole can be inflated in the test state so as to judge the air tightness of the blind hole by visually detecting whether bubbles are generated, and it can be retracted after completing a test so as to facilitate the placement of the parts to be tested. The height of the blind holes on the parts to be tested of different specifications can also be adjusted by adding, removing or replacing the pads. The parts to be tested of different specifications and sizes can be tested without replacing the telescopic cylinder, thereby improving the efficiency of the test and saving the production cost.
[0013] 2. The leakage testing mechanism of the present invention further installs at least two 90-degree rotating cylinders on the lower surface of the carrier plate, the piston rod of the 90-degree rotating cylinder passes through the carrier plate upward and is installed with a rotating block, one end of the rotating block is connected to the piston rod of the 90-degree rotating cylinder and can rotate with its piston rod, and a pressure head is installed on the other end of the rotating block. When the piston rod of the 90-degree rotating cylinder is in a retracted state, the lower surface of the pressure head is pressed and contacted with the upper surface of the part to be tested, and when the piston rod of the 90-degree rotating cylinder is in an extended state, the pressure head is arranged away from the part to be tested after rotating 90° with the piston rod of the 90-degree rotating cylinder. It can not only achieve stable limiting of the part to be tested during the detection process, avoid the situation that the part to be tested is offset by the thrust from the telescopic cylinder, resulting in the inlet head and the part to be tested not being able to fit tightly, the inlet channel and the blind hole not being able to be sealed and connected, resulting in incorrect judgment of the test result, but also facilitate the placement and installation of the part to be tested, thereby improving the convenience and efficiency of continuous detection. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the leakage testing mechanism of the present invention; Figure 2 The partial structure diagram of the leakage test mechanism of the present invention is shown in FIG. Figure 1 ; Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle; Figure 4 for Figure 2 Schematic diagram of the cross section along BB; Figure 5 It is a schematic diagram of the working state of the leakage test mechanism of the present invention with a gasket; Figure 6 It is a schematic diagram of the working state of the leakage test mechanism of the present invention without a gasket; Figure 7 The partial structure diagram of the leakage test mechanism of the present invention is shown in FIG. Figure 2 ; Figure 8 for Figure 7 Schematic diagram of the cross section along CC.
[0015] In the above figures: 100, part to be tested; 101, blind hole; 102, through hole; 104, through hole area; 105, avoidance through hole; 1, substrate; 2, carrier plate; 21, mounting groove; 3, 90-degree angle cylinder; 4, rotating block; 5, pressure head; 61, positioning pin; 62, positioning hole; 7, telescopic cylinder; 8, air inlet head; 9, air inlet channel; 10, mounting seat; 11, pad; 12, supporting foot; 13, box; 14, water outlet; 15, handle. Implementation
[0016] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.
[0017] Embodiment 1: A leakage testing mechanism, comprising: a substrate 1, a carrier plate 2 for mounting a part to be tested 100, and a box body 13 into which liquid can be injected, wherein the carrier plate 2 is mounted on the upper surface of the substrate 1, and has at least two specifications of parts to be tested 100, and a plurality of blind holes 101 are provided on the side surface of each specification of the part to be tested 100, and a plurality of through holes 102 corresponding to the blind holes 101 are provided on the upper surface of the part to be tested 100, and the through holes 102 which penetrate from top to bottom are arranged adjacent to the bottom of the corresponding blind holes 101, and the lower surface of the part to be tested 100 is overlapped and connected with the upper surface of the carrier plate 2, and the distances between the blind holes 101 and the lower surface of the part to be tested 100 are different for parts to be tested 100 of different specifications, and a pad 11 is detachably provided on the upper surface of the carrier plate 2, and the upper surface of the pad 11 can be overlapped and connected with the lower surface of the part to be tested 100; When the distance between the blind hole on the part to be tested and the lower surface of the part to be tested is short, resulting in the blind hole being lower than the air intake passage, a detachable pad is installed on the carrier plate, and then the part to be tested is placed on the pad to increase the height of the blind hole, ensuring that the blind holes of the parts to be tested of different specifications can be sealed and connected with the air intake passage, thereby realizing the detection of parts to be tested of different specifications without replacing other components; The outer side of the carrier plate 2 is provided with a plurality of telescopic cylinders 7 corresponding to the blind holes 101, and the piston rod of each telescopic cylinder 7 is coaxially arranged with the corresponding blind hole 101. An air inlet head 8 is mounted on the piston rod of the telescopic cylinder 7, and an air inlet channel 9 coaxially arranged with the blind hole 101 is opened at one end of the air inlet head 8 facing the carrier plate 2. When the piston rod of the telescopic cylinder 7 is in an extended state, one end of the air inlet channel 9 is sealed and connected with the blind hole 101, and the other end is connected with the air source through a pipeline. The end of the air inlet head 8 used for contacting with the blind hole 101 is made of elastic material, which can be rubber or silicone, and the end connected with the piston rod of the telescopic cylinder 7 is made of metal. The end of the air inlet head 8 facing the part to be tested 100 also has a protrusion that can be embedded in the blind hole 101, and the protrusion is set to a conical surface near the end of the blind hole 101, which plays a certain guiding role. The piston rod of the telescopic cylinder is extended, and drives the air inlet head on it to fit with the side surface of the part to be tested, so that the air inlet channel on the air inlet head is sealed and connected with the blind hole on the side surface of the part to be tested; At least two 90-degree rotation cylinders 3 are installed on the lower surface of the carrier plate 2. The piston rods of the 90-degree rotation cylinders 3 pass through the carrier plate 2 upward and are installed with a rotating block 4. One end of the rotating block 4 is connected to the piston rod of the 90-degree rotation cylinder 3 and can rotate with the piston rod. A pressing head 5 is installed on the other end of the rotating block 4. When the piston rod of the 90-degree rotation cylinder 3 is in a retracted state, the lower surface of the pressing head 5 is pressed and contacted with the upper surface of the part to be measured 100. When the piston rod of the 90-degree rotation cylinder 3 is in an extended state, the pressing head 5 is arranged away from the part to be measured 100 after rotating 90° with the piston rod of the 90-degree rotation cylinder 3. The piston rod of the 90-degree rotating cylinder is driven to retract downward and drive one end of the rotating block to rotate above the part to be tested, and the pressure head installed on the rotating block applies a downward pressing force to the part to be tested, thereby achieving stable pressing and positioning of the part to be tested.
[0018] The carrier plate 2 with the part to be tested 100 mounted thereon is placed in the box 13 along with the base plate 1 , and the liquid level of the liquid is higher than the upper surface of the part to be tested 100 .
[0019] A water outlet 14 is disposed on the side wall of the box body 13 .
[0020] At least two handles 15 are installed on the upper surface of the substrate 1 .
[0021] The telescopic cylinder 7 is mounted on the upper surface of the base plate 1 through a mounting seat 10 .
[0022] Blind holes 101 are formed on the four side surfaces of the component 100 to be tested.
[0023] The area on the upper surface of the tested part 100 that can be pressed and contacted by the pressing head 5 is arranged away from the through hole 102 .
[0024] Embodiment 2: A leakage test mechanism, comprising: a substrate 1, a carrier plate 2 for mounting a part to be tested 100, and a box body 13 into which liquid can be injected, wherein the carrier plate 2 is mounted on the upper surface of the substrate 1, and has at least two specifications of parts to be tested 100, and a plurality of blind holes 101 are provided on the side surface of each specification of the part to be tested 100, and a plurality of through holes 102 corresponding to the blind holes 101 are provided on the upper surface of the part to be tested 100, and the through holes 102 which penetrate from top to bottom are arranged adjacent to the bottom of the corresponding blind holes 101, and the lower surface of the part to be tested 100 is overlapped and connected with the upper surface of the carrier plate 2, and the distances between the blind holes 101 and the lower surface of the part to be tested 100 are different for parts to be tested 100 of different specifications, and a pad 11 is detachably provided on the upper surface of the carrier plate 2, and the upper surface of the pad 11 can be overlapped and connected with the lower surface of the part to be tested 100; Put the clamped parts to be tested together with the substrate into the box; Inject liquid (such as water) into the box until the liquid level is higher than the upper surface of the part to be tested, inflate the blind hole through the air inlet channel, and observe whether there are bubbles near the blind hole area. If there are bubbles, it means that the air tightness of the blind hole is unqualified, otherwise, it is qualified; The outer side of the carrier plate 2 is provided with a plurality of telescopic cylinders 7 corresponding to the blind holes 101, the piston rod of each telescopic cylinder 7 is coaxially arranged with the corresponding blind hole 101, an air inlet head 8 is sleeved on the piston rod of the telescopic cylinder 7, and an air inlet channel 9 coaxially arranged with the blind hole 101 is opened at one end of the air inlet head 8 facing the carrier plate 2, when the piston rod of the telescopic cylinder 7 is in an extended state, one end of the air inlet channel 9 is sealed and connected with the blind hole 101, and the other end is connected with the air source through a pipeline; In the initial state, the piston rod of the 90-degree rotation cylinder is placed in an extended state, and the piston rod of the telescopic cylinder is placed in a retracted state; At least two 90-degree rotation cylinders 3 are installed on the lower surface of the carrier plate 2. The piston rods of the 90-degree rotation cylinders 3 pass upward through the carrier plate 2 and are installed with a rotating block 4. One end of the rotating block 4 is connected to the piston rod of the 90-degree rotation cylinder 3 and can rotate with the piston rod. A pressing head 5 is installed on the other end of the rotating block 4. When the piston rod of the 90-degree rotation cylinder 3 is in a retracted state, the lower surface of the pressing head 5 is pressed and contacted with the upper surface of the part to be measured 100. When the piston rod of the 90-degree rotation cylinder 3 is in an extended state, the pressing head 5 is arranged away from the part to be measured 100 after rotating 90° with the piston rod of the 90-degree rotation cylinder 3.
[0025] The carrier plate 2 with the part to be tested 100 mounted thereon is placed in the box 13 along with the base plate 1 , and the liquid level of the liquid is higher than the upper surface of the part to be tested 100 .
[0026] At least two handles 15 are installed on the upper surface of the substrate 1 .
[0027] The area on the upper surface of the tested part 100 that can be pressed and contacted by the pressing head 5 is arranged away from the through hole 102 .
[0028] The frame-shaped part to be tested 100 has a through hole area 104 in the center, and the two 90-degree rotation cylinders 3 are both arranged directly below the through hole area 104 .
[0029] The lower surface of the component to be tested 100 is overlapped and connected with the upper surface of the carrier plate 2 at the edges thereof.
[0030] The above-mentioned part to be tested 100 is connected to the carrier plate 2 through at least two groups of positioning pins 61 and positioning holes 62. When in use, the part to be tested is first placed on the carrier plate, and the part to be tested is initially positioned through the positioning pins and positioning holes.
[0031] A mounting groove 21 is formed on the lower surface of the carrier plate 2 , and the 90-degree rotation cylinder 3 is mounted in the mounting groove 21 .
[0032] The base plate 1 is provided with a through hole 105 for the 90-degree rotation cylinder 3 to pass through.
[0033] At least three supporting legs 12 are installed on the lower surface of the base plate 1 , and the lower surface of the supporting legs 12 is lower than the lower surface of the 90-degree rotation cylinder 3 .
[0034] The working principle of the present invention is as follows: In the initial state, the piston rod of the 90-degree rotation cylinder is placed in an extended state, and the piston rod of the telescopic cylinder is placed in a retracted state; When using, first place the part to be tested on the carrier plate, and use the positioning pins and positioning holes to achieve preliminary positioning of the part to be tested; When the distance between the blind hole on the part to be tested and the lower surface of the part to be tested is short, resulting in the blind hole being lower than the air intake passage, a detachable pad is installed on the carrier plate, and then the part to be tested is placed on the pad to increase the height of the blind hole, ensuring that the blind holes of the parts to be tested of different specifications can be sealed and connected with the air intake passage, thereby realizing the detection of parts to be tested of different specifications without replacing other components; Then drive the piston rod of the 90-degree rotating cylinder downward to retract and drive one end of the rotating block to rotate above the part to be tested, and make the pressure head installed on the rotating block apply a downward pressing force to the part to be tested, so as to achieve stable pressing and positioning of the part to be tested; Put the clamped parts to be tested together with the substrate into the box; The piston rod of the telescopic cylinder is extended, and the air inlet head on the cylinder is driven to fit with the side surface of the part to be tested, so that the air inlet channel on the air inlet head is sealed and connected with the blind hole on the side surface of the part to be tested; Inject liquid (such as water) into the box until the liquid level is higher than the upper surface of the part to be tested, inflate the blind hole through the air inlet channel, and observe whether there are bubbles in the area near the blind hole. If so, it means that the air tightness of the blind hole is unqualified, otherwise, it is qualified.
[0035] The leakage testing mechanism of the present invention can inflate the blind hole in the test state through the extension and retraction of the telescopic cylinder so as to judge the air tightness of the blind hole by visually detecting whether bubbles are generated, and can also shrink after completing a test so as to facilitate the taking and placing of the parts to be tested. The height of the blind holes on the parts to be tested of different specifications can be adjusted by adding, removing or replacing the pads, and the parts to be tested of different specifications and sizes can be tested without replacing the telescopic cylinder, thereby improving the efficiency of testing and saving production costs. Furthermore, it can not only realize the stable limiting of the parts to be tested during the testing process, avoiding the displacement of the parts to be tested due to the thrust from the telescopic cylinder, resulting in the inlet head and the parts to be tested not being able to fit tightly, and the inlet channel and the blind hole not being able to be sealed and connected, resulting in incorrect judgment of the test results, but also facilitate the taking, placing and installation of the parts to be tested, thereby improving the convenience and efficiency of continuous testing.
[0036] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.
Claims
1. A leakage testing mechanism, comprising: A substrate (1), a carrier plate (2) for mounting a part to be tested (100), and a box (13) into which liquid can be injected, wherein the carrier plate (2) is mounted on the upper surface of the substrate (1), and is characterized in that: there are at least two specifications of parts to be tested (100), each specification of the part to be tested (100) is provided with a plurality of blind holes (101) on the side surface, and the upper surface of the part to be tested (100) is provided with a plurality of through holes (102) corresponding to the blind holes (101), The through hole (102) extending downward is arranged adjacent to the bottom of the corresponding blind hole (101); the lower surface of the part to be tested (100) is overlapped and connected with the upper surface of the carrier plate (2); the distance between the blind hole (101) and the lower surface of the part to be tested (100) is different for parts to be tested (100) of different specifications; a pad (11) is detachably provided on the upper surface of the carrier plate (2); the upper surface of the pad (11) can be overlapped and connected with the lower surface of the part to be tested (100); A plurality of telescopic cylinders (7) corresponding to the blind holes (101) are arranged on the outer side of the carrier plate (2); the piston rod of each telescopic cylinder (7) is coaxially arranged with the corresponding blind hole (101); an air inlet head (8) is sleeved on the piston rod of the telescopic cylinder (7); an air inlet channel (9) coaxially arranged with the blind hole (101) is opened at one end of the air inlet head (8) facing the carrier plate (2); when the piston rod of the telescopic cylinder (7) is in an extended state, one end of the air inlet channel (9) is sealed and connected to the blind hole (101), and the other end is connected to the air source through a pipeline; At least two 90-degree rotation cylinders (3) are mounted on the lower surface of the carrier plate (2); the piston rods of the 90-degree rotation cylinders (3) pass through the carrier plate (2) upward and are mounted with a rotating block (4); one end of the rotating block (4) is connected to the piston rod of the 90-degree rotation cylinder (3) and can rotate with the piston rod; the other end of the rotating block (4) is mounted with a pressing head (5); when the piston rod of the 90-degree rotation cylinder (3) is in a retracted state, the lower surface of the pressing head (5) is in pressure-holding contact with the upper surface of the part to be measured (100); when the piston rod of the 90-degree rotation cylinder (3) is in an extended state, the pressing head (5) is arranged away from the part to be measured (100) after rotating 90° with the piston rod of the 90-degree rotation cylinder (3).
2. The leakage testing mechanism according to claim 1, characterized in that: The carrier plate (2) on which the part to be tested (100) is mounted is placed in the box (13) along with the base plate (1), and the liquid level is higher than the upper surface of the part to be tested (100).
3. The leakage testing mechanism according to claim 2, characterized in that: A water outlet (14) is provided on the side wall of the box body (13).
4. The leakage testing mechanism according to claim 1, characterized in that: At least two handles (15) are mounted on the upper surface of the base plate (1).
5. The leakage testing mechanism according to claim 1, characterized in that: The telescopic cylinder (7) is mounted on the upper surface of the base plate (1) via a mounting seat (10).
6. The leakage testing mechanism according to claim 1, characterized in that: Blind holes (101) are provided on the four side surfaces of the part to be tested (100).
7. The leakage testing mechanism according to claim 1, characterized in that: The area on the upper surface of the part to be tested (100) that can be pressed and contacted with the pressure head (5) is arranged away from the through hole (102).