CN107144406B - Air tightness detection device - Google Patents
Air tightness detection device Download PDFInfo
- Publication number
- CN107144406B CN107144406B CN201710523357.1A CN201710523357A CN107144406B CN 107144406 B CN107144406 B CN 107144406B CN 201710523357 A CN201710523357 A CN 201710523357A CN 107144406 B CN107144406 B CN 107144406B
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- frame body
- plate
- workpiece
- square frame
- water tank
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses airtight detection equipment, which comprises a water tank with an opening at the top, wherein a clamp assembly for positioning a workpiece is arranged at the opening of the water tank in a sliding manner, two sides of the water tank are symmetrically provided with a movable mechanism for moving the clamp assembly to immerse the workpiece into the water tank and driven by a first air cylinder, the clamp assembly comprises a square frame body, a clamp is arranged between an upper frame body surface and a lower frame body surface of the square frame body, and the clamp comprises an upper clamping plate arranged on the upper frame body surface of the square frame body and driven by a driving device and a lower clamping plate fixedly arranged on the lower frame body surface of the square frame body; the device also comprises a detection mechanism for detecting the air tightness of the workpiece, wherein the detection mechanism is provided with a control switch, a pressure gauge and a pressure adjusting knob, and the control switch is used for simultaneously controlling the running states of the driving device and the first cylinder; compared with the prior art, the method can accurately detect the air tightness of the workpiece, and has the advantages of simple operation and high detection efficiency.
Description
Technical Field
The invention relates to the field of detection equipment, in particular to airtight detection equipment.
Background
The quality of the automobile parts is critical to the technical performance and the safety performance of the whole automobile. At present, important accessories such as a cylinder body, a gearbox body, an air inlet pipe, an air outlet pipe and the like are generally manufactured by adopting a die casting production process, and die castings are generally easy to have quality defects such as air holes, sand holes, looseness, cracks and the like, and are easy to cause serious quality problems such as leakage and the like. In this regard, after the die casting is completed, the air tightness of the die-cast workpiece is required to be detected. The detection method adopted at present is a ventilation water test method, namely, a workpiece is immersed in water, air is connected to an air connection hole of the workpiece to see whether water bubbling occurs, and accordingly whether leakage phenomena such as air leakage and water leakage and die casting defects exist in the die casting box body or not is judged. However, the method has a lot of defects, the workpiece is placed in water, the workpiece is required to be pressed into the water by a worker for detection, and the process is complex; and only by manual judgment when the detection result is observed, the detection method is not accurate enough and has low detection efficiency.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the airtight detection equipment so as to solve the problems that in the prior art, a test workpiece is placed in water, a worker is required to press the test workpiece into the water for detection, the process is complex, and the detection result is observed only by manual judgment, so that the airtight detection equipment is inaccurate and has low detection efficiency.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the airtight detection equipment comprises a water tank with an opening at the top, wherein a clamp assembly for positioning a workpiece is slidably arranged at the opening of the water tank, two sides of the water tank are symmetrically provided with a movable mechanism for moving the clamp assembly to immerse the workpiece into the water tank and driven by a first cylinder, the clamp assembly comprises a square frame body, a clamp is arranged between an upper frame surface and a lower frame surface of the square frame body, and comprises an upper clamping plate and a lower clamping plate, the upper clamping plate is arranged on the upper frame surface of the square frame body and driven by a driving device, and the lower clamping plate is fixedly arranged on the lower frame surface of the square frame body; the device further comprises a detection mechanism for detecting the air tightness of the workpiece, wherein a control switch, a pressure gauge and a pressure adjusting knob are arranged on the detection mechanism, and the control switch is used for simultaneously controlling the running states of the driving device and the first cylinder.
Placing the workpiece on a lower clamping plate, communicating the detection mechanism with a gas receiving hole of the workpiece, enabling an upper clamping plate of the clamp to move to the lower clamping plate by starting a control switch on the detection mechanism, and clamping and fixing the workpiece through the upper clamping plate and the lower clamping plate; meanwhile, the movable mechanism driven by the first air cylinder drives the clamp assembly to move into the water tank, so that the workpiece is immersed into water in the water tank; the detection mechanism is connected with air, the air enters the workpiece after passing through the detection mechanism, if the water in the water tank overflows bubbles or the pointer of the pressure gauge swings, the phenomenon that the workpiece leaks is indicated, otherwise, the phenomenon that the workpiece does not leak is indicated; the pressure of air is regulated through the pressure regulating knob, so that the speed of air entering the workpiece can be increased, and the detection efficiency of the workpiece is improved.
Compared with the prior art, the invention has the following beneficial effects: 1. the upper clamping plate and the lower clamping plate of the clamp the workpiece and fix the workpiece only by starting the control switch on the detection mechanism, and the workpiece is immersed into the water tank through the driving of the first cylinder, so that the operation is simple, and the workpiece is not required to be immersed into water for detection manually by a worker; 2. the air tightness detection is carried out on the workpiece through the detection mechanism, the detection result is judged by using the pressure gauge, the detection result is accurate, and the detection efficiency is high.
Drawings
FIG. 1 is a schematic diagram of the structure of the airtight detecting apparatus of the present invention;
FIG. 2 is a front view of FIG. 1;
fig. 3 is a schematic structural diagram of the detection mechanism in fig. 1.
Detailed Description
The invention is described in further detail below by way of specific embodiments:
reference numerals in the drawings of the specification include: the water tank 1, the square frame body 2, the clamp 3, the upper clamping block 301, the lower clamping block 302, the support bar 4, the driving device 5, the telescopic mechanism 501, the adjusting mechanism 502, the first mounting plate 5011, the second cylinder 5012, the first sleeve 5013, the first sliding rod 5014, the adjusting plate 5021, the connecting plate 5022, the fixed column 5023, the fixed plate 5024, the connecting column 5025, the attaching plate 5026, the first support plate 5027, the bar hole 5028, the first cylinder 6, the moving mechanism 7, the second mounting plate 701, the second sleeve 702, the second sliding rod 703, the second support plate 704, the detecting mechanism 8, the control switch 801, the pressure gauge 802, the pressure adjusting knob 803, the power switch 804, the power indicator 805, the failure warning lamp 806, the pressure maintaining time delay knob 807, the start button 8011, the stop button 8012, and the workpiece 9.
Examples
Referring to fig. 1 to 3, it is shown that: the airtight detection equipment comprises a water tank 1 with an opening at the top, and a clamp assembly for positioning a workpiece 9 is slidably arranged at the opening of the water tank 1; the fixture assembly comprises a square frame body 2, a fixture 3 is arranged between an upper frame body surface and a lower frame body surface of the square frame body 2, support bars 4 which are arranged in a staggered mode are arranged on the lower frame body surface of the square frame body 2, and the support bars 4 are arranged to install the support fixture 3, so that when the fixture 3 clamps and fixes a workpiece 9, the pressure transmitted by the fixture 3 can be uniformly dispersed on the square frame body 2; the fixture 3 comprises an upper clamping plate and a lower clamping plate, wherein the upper clamping plate is arranged on the upper frame surface of the square frame body 2 and driven by the driving device 5, the lower clamping plate is fixedly arranged on the lower frame surface of the square frame body 2, the upper clamping plate comprises two upper clamping blocks 301 which are arranged in parallel and have the same structure, the lower surface of the upper clamping block 301 is arc-shaped, the lower clamping plate comprises two lower clamping blocks 302 which are arranged on the support bar 4 in parallel and have the same structure, and the upper surface of the lower clamping plate is arc-shaped;
the driving device 5 comprises a telescopic mechanism 501 and an adjusting mechanism 502, wherein the telescopic mechanism 501 comprises a first mounting plate 5011 fixedly arranged in the middle of the upper frame surface of the square frame 2, a second air cylinder 5012 for enabling an upper clamping plate to be close to or far away from the lower clamping block 302 is arranged in the middle of the first mounting plate 5011, two first sleeves 5013 symmetrically arranged by taking the second air cylinder 5012 as a symmetrical axis are arranged in the vertical direction of the first mounting plate 5011, and a first sliding rod 5014 is arranged in each first sleeve 5013 in a sliding manner; the adjusting mechanism 502 comprises two adjusting plates 5021 which are arranged in parallel, a groove-shaped connecting plate 5022 is connected between the two adjusting plates 5021, fixing columns 5023 are connected to two sides of the lower surface of each adjusting plate 5021, fixing plates 5024 are connected to the upper surface of each adjusting plate 5021, gaps are formed in opposite sides of the two fixing plates 5024, the fixing columns 5023 are detachably connected with the adjusting plates 5021 through second bolts, the fixing columns 5023 are connected with lower clamping plates, connecting columns 5025 are connected to two sides of the upper surface of each fixing plate 5024, laminating plates 5026 are connected to the upper end faces of the connecting columns 5025 on the same fixing plate 5024, first supporting plates 5027 are connected to the upper surfaces of the two laminating plates 5026, four strip-shaped holes 5028 which are arranged in a rectangular array are formed in the first supporting plates 5027, the strip-shaped holes 5028 can be detachably connected with the laminating plates 5026 through first bolts, the first bolts can slide in the length direction of the lower frame face of the square frame 2 in the strip-shaped holes 5028, the arrangement of the hole 5028 is that the adjusting mechanism can be matched with the clamping plates 502 in a proper position so that the clamping plates can be conveniently moved on the clamping plates 502; the first support plate 5027 is connected with a piston rod of the second air cylinder 5012 and the first sliding rod 5014; the whole driving device 5 is arranged in a symmetrical structure, so that the workpiece 9 is clamped and fixed more stably, and the force transmitted by the second air cylinder 5012 is distributed more uniformly in the process of clamping and fixing the workpiece 9.
The two sides of the water tank 1 are symmetrically provided with a movable mechanism 7 for moving the clamp assembly to immerse the workpiece 9 in the water tank 1 and driven by a first air cylinder 6, the movable mechanism 7 comprises a second mounting plate 701 fixedly connected to the outer side wall of the water tank 1, the first air cylinder 6 is arranged on the second mounting plate 701, two second sleeves 702 symmetrically arranged by taking the first air cylinder 6 as a symmetry axis are arranged on the second mounting plate 701 in the vertical direction, a second sliding rod 703 is arranged in each second sleeve 702 in a sliding manner, the second sliding rod 703 is connected with a second supporting plate 704, and the second supporting plate 704 is connected with the square frame 2; still include the detection mechanism 8 that is used for detecting work piece 9 gas tightness, be provided with into the air hole and go out the air hole on the detection mechanism 8, and be equipped with control switch 801, manometer 802, pressure adjust knob 803, switch 804, power indicator 805, trouble alarm 806 and pressurize delay knob 807 on the detection mechanism 8, control switch 801 is used for controlling the running state of drive arrangement 5 and first cylinder 6 simultaneously, control switch 801 includes start button 8011 and stop button 8012.
When in use, the workpiece 9 is placed on the two lower clamping blocks 302 of the lower clamping plate, and the air outlet hole of the detection mechanism 8 is communicated with the air receiving hole of the workpiece 9; pressing the start button 8011, extending a piston rod of the second cylinder 5012, sliding the first sliding rod 5014 in the first sleeve 5013 toward the workpiece 9, and pushing the adjusting mechanism 502 to slide toward the workpiece 9 by the second cylinder 5012, so that the upper clamping plate and the lower clamping plate cooperate to clamp and fix the workpiece 9; simultaneously, the piston rod of the first air cylinder 6 extends, the second sliding rod 703 slides in the second sleeve 702, and the clamp 3 assembly moves towards the inner direction of the water tank 1, so that the workpiece 9 is immersed in water; air is introduced into an air inlet hole of the detection mechanism 8, then the air enters the workpiece 9 through the detection mechanism 8, a power switch 804 is started, a power indicator 805 emits light, the pressure of the introduced air is regulated through a pressure regulating knob 803, the pressure maintaining time in the workpiece 9 is regulated through a pressure maintaining time delay knob 807, a pointer of a pressure gauge 802 displays the pressure value of the air, the pointer of the pressure gauge 802 swings or water in the water tank 1 is blown out of bubbles, the air tightness of the workpiece 9 is poor, quality defects such as air holes, sand holes, looseness or cracks exist on the workpiece 9, and the quality of the workpiece 9 is unqualified; otherwise, the quality of the workpiece 9 is qualified.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and it is intended to be covered by the scope of the claims of the present invention.
Claims (6)
1. The airtight detection equipment is characterized by comprising a water tank (1) with an opening at the top, wherein a clamp assembly for positioning a workpiece (9) is slidably arranged at the opening of the water tank (1), two sides of the water tank (1) are symmetrically provided with a movable mechanism (7) for moving the clamp assembly to immerse the workpiece (9) into the water tank (1) and driven by a first air cylinder (6), the clamp assembly comprises a square frame body (2), a clamp (3) is arranged between an upper frame body surface and a lower frame body surface of the square frame body (2), and the clamp (3) comprises an upper clamping plate which is arranged on the upper frame body surface of the square frame body (2) and is driven by a driving device (5) and a lower clamping plate which is fixedly arranged on the lower frame body surface of the square frame body (2); the device further comprises a detection mechanism (8) for detecting the air tightness of the workpiece (9), wherein the detection mechanism (8) is provided with a control switch (801), a pressure gauge (802) and a pressure adjusting knob (803), and the control switch (801) is used for simultaneously controlling the running states of the driving device (5) and the first air cylinder (6);
the driving device (5) comprises a telescopic mechanism (501) and an adjusting mechanism (502); the telescopic mechanism (501) comprises a first mounting plate (5011) fixedly arranged in the middle of the upper frame surface of the square frame body (2), a second air cylinder (5012) for enabling an upper clamping plate to be close to or far away from a lower clamping block (302) is arranged in the middle of the first mounting plate (5011), two first sleeves (5013) symmetrically arranged by taking the second air cylinder (5012) as a symmetry axis are arranged in the vertical direction of the first mounting plate (5011), and a first sliding rod (5014) is arranged in each first sleeve (5013) in a sliding mode; the adjusting mechanism (502) comprises two adjusting plates (5021) which are arranged in parallel, a connecting plate (5022) is connected between the two adjusting plates (5021), fixing columns (5023) are connected to two sides of the lower surface of each adjusting plate (5021), fixing plates (5024) are detachably connected to the upper surface of each adjusting plate (5021), the fixing columns (5023) are connected with a lower clamping plate, connecting columns (5025) are connected to two sides of the upper surface of each fixing plate (5024), laminating plates (5026) are connected to the upper end faces of the connecting columns (5025) on the same fixing plate (5024), first supporting plates (5027) are detachably and slidably connected to the upper surfaces of the two laminating plates (5026), and piston rods of the first supporting plates (5027) and the second cylinders (5012) are connected to the first sliding rods (5014);
the lower frame surface of the square frame body (2) is provided with support bars (4) which are arranged in a staggered way.
2. The air tightness detection device according to claim 1, wherein: four strip-shaped holes (5028) which are arranged in a rectangular array are formed in the first supporting plate (5027), the strip-shaped holes (5028) are detachably connected with the attaching plate (5026) through first bolts, and the first bolts can slide in the strip-shaped holes (5028) along the length direction of the lower frame surface of the square frame body (2).
3. The air tightness detection device according to claim 1, wherein: the opposite sides of the two fixing plates (5024) are respectively provided with a notch, and the notches are detachably connected with the adjusting plate (5021) through second bolts.
4. The air tightness detection device according to claim 1, wherein: the upper clamping plate comprises two upper clamping blocks (301) which are arranged in parallel.
5. The air tightness detection device according to claim 1, wherein: the lower clamping plate comprises two lower clamping blocks (302) which are arranged on the supporting bar (4) in parallel.
6. The air tightness detection device according to claim 1, wherein: the movable mechanism (7) comprises a second mounting plate (701) fixedly connected to the outer side wall of the water tank (1), the first air cylinder (6) is arranged on the second mounting plate (701), two second sleeves (702) which are symmetrically arranged by taking the first air cylinder (6) as a symmetrical axis are arranged on the vertical direction of the second mounting plate (701), a second sliding rod (703) is arranged in each second sleeve (702) in a sliding mode, the second sliding rod (703) is connected with a second supporting plate (704), and the second supporting plate (704) is connected with the square frame body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710523357.1A CN107144406B (en) | 2017-06-30 | 2017-06-30 | Air tightness detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710523357.1A CN107144406B (en) | 2017-06-30 | 2017-06-30 | Air tightness detection device |
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| Publication Number | Publication Date |
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| CN107144406A CN107144406A (en) | 2017-09-08 |
| CN107144406B true CN107144406B (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710523357.1A Active CN107144406B (en) | 2017-06-30 | 2017-06-30 | Air tightness detection device |
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| CN (1) | CN107144406B (en) |
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|---|---|---|---|---|
| CN107560794A (en) * | 2017-09-11 | 2018-01-09 | 郑州斯倍思机电有限公司 | A kind of air tightness test platform for cylinder body |
| CN108168791A (en) * | 2017-12-30 | 2018-06-15 | 东莞市天美新自动化设备有限公司 | A kind of air-tightness detection device of automotive oil tank |
| CN108971024B (en) * | 2018-08-31 | 2020-01-07 | 东莞理工学院 | Equipment for air tightness detection |
| CN109580123A (en) * | 2018-12-17 | 2019-04-05 | 保定市屹马汽车配件制造有限公司 | It is a kind of to reduce the mixed error prevention device for putting problem of catalyst converter products air tightness detection |
| CN110132504B (en) * | 2019-05-13 | 2020-12-25 | 大族激光科技产业集团股份有限公司 | Air tightness testing device and air tightness testing method |
| CN111174983B (en) * | 2020-01-14 | 2022-01-21 | 大同新成新材料股份有限公司 | A gas tightness check out test set that is used for intelligent carbon slide to detect usefulness in batches |
| CN113820083B (en) * | 2021-11-23 | 2022-03-08 | 临沂华庚新材料科技有限公司 | Blank casting cavity pressure detection device |
| CN117054000B (en) * | 2023-10-12 | 2023-12-19 | 南通市兴铭匠精密五金有限公司 | Aluminum alloy shell air tightness detection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07198525A (en) * | 1993-12-28 | 1995-08-01 | Toyota Motor Corp | Air tightness inspection device for vessel |
| CN204027785U (en) * | 2014-06-30 | 2014-12-17 | 江阴市万事兴汽车部件制造有限公司 | Trunk for expansion impermeability water inspection equipment |
| CN105115670A (en) * | 2015-09-22 | 2015-12-02 | 浙江众立不锈钢管股份有限公司 | Steel pipe hydraulic pressure test system |
| CN106370357A (en) * | 2016-08-31 | 2017-02-01 | 重庆科杰实业有限责任公司 | Multifunctional water leakage detection device |
| CN206146606U (en) * | 2016-11-03 | 2017-05-03 | 山东统亚模塑科技实业有限公司 | Drainage connecting piece gas tightness detection device |
| CN206960060U (en) * | 2017-06-30 | 2018-02-02 | 重庆华达汽车配件制造有限公司 | Airtight detecting apparatus |
-
2017
- 2017-06-30 CN CN201710523357.1A patent/CN107144406B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07198525A (en) * | 1993-12-28 | 1995-08-01 | Toyota Motor Corp | Air tightness inspection device for vessel |
| CN204027785U (en) * | 2014-06-30 | 2014-12-17 | 江阴市万事兴汽车部件制造有限公司 | Trunk for expansion impermeability water inspection equipment |
| CN105115670A (en) * | 2015-09-22 | 2015-12-02 | 浙江众立不锈钢管股份有限公司 | Steel pipe hydraulic pressure test system |
| CN106370357A (en) * | 2016-08-31 | 2017-02-01 | 重庆科杰实业有限责任公司 | Multifunctional water leakage detection device |
| CN206146606U (en) * | 2016-11-03 | 2017-05-03 | 山东统亚模塑科技实业有限公司 | Drainage connecting piece gas tightness detection device |
| CN206960060U (en) * | 2017-06-30 | 2018-02-02 | 重庆华达汽车配件制造有限公司 | Airtight detecting apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 范伟 ; 余麟 ; 李桦 ; 刘琼 ; 彭光正 ; .通用型变速器壳体气密性泄漏检测装置.机床与液压.2007,(03),145-148+151. * |
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