CN220018858U - Pressure sensor helium detection tool - Google Patents
Pressure sensor helium detection tool Download PDFInfo
- Publication number
- CN220018858U CN220018858U CN202321633135.2U CN202321633135U CN220018858U CN 220018858 U CN220018858 U CN 220018858U CN 202321633135 U CN202321633135 U CN 202321633135U CN 220018858 U CN220018858 U CN 220018858U
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- Prior art keywords
- detection
- pressure sensor
- jig
- fixture
- tool
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- 238000001514 detection method Methods 0.000 title claims abstract description 61
- 239000001307 helium Substances 0.000 title claims abstract description 36
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 36
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 47
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052802 copper Inorganic materials 0.000 claims abstract description 19
- 239000010949 copper Substances 0.000 claims abstract description 19
- 238000001819 mass spectrum Methods 0.000 claims abstract description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model discloses a helium detection tool for a pressure sensor, which comprises an upper jig and a lower jig matched with the upper jig, wherein a sealing gasket is arranged on the lower jig corresponding to the upper jig, and the upper jig is connected with a lifting sealing mechanism; the lower jig upper end is equipped with places the piece, and it is equipped with a plurality of standing grooves to place to correspond pressure sensor on the piece, go up still to correspond pressure sensor on the jig and inlay and be equipped with a plurality of detection pieces, all correspond pressure sensor's copper pipe in the detection piece and be equipped with the detection chamber, go up the jig lower extreme and still correspond the detection piece and seted up and hold the chamber, it has the exhaust tube to link up to hold the chamber to correspond down on the jig, is equipped with mass spectrum leak detector on the exhaust tube and is connected to the exhaust end of vacuum pump. The utility model has reasonable design and novel structure, can detect the atmospheric pressure of the pressure sensor, greatly improves the reliability of welding detection results, can detect a plurality of pressure sensors at the same time, and greatly improves the detection efficiency of the pressure sensor.
Description
Technical Field
The utility model relates to the technical field of detection equipment, in particular to a helium detection tool for a pressure sensor.
Background
The pressure sensor is a device or a device which can sense pressure signals and convert the pressure signals into usable output electric signals according to a certain rule, and in order to ensure the quality of the pressure sensor, the welding of the pressure sensor is required to be subjected to sealing test.
In the sealing test process of the pressure sensor, the helium mass spectrometer leak detector is often used for carrying out the air tightness test on the welding position, and an O-shaped ring is generally adopted for carrying out the radial sealing, but the sealing mode cannot bear too high inflation pressure (can bear the inflation pressure of 10 kilograms generally), the workpiece and the sealing ring are easy to slide and fall off due to the too high inflation pressure, the detection accuracy is affected, excessive manual participation is needed, and the detection efficiency is lower.
Disclosure of Invention
The utility model aims to solve the defects that in the prior art, a sealing mode cannot bear too high inflation pressure, the workpiece and a sealing ring slide and fall off easily due to the too high inflation pressure, the detection effect and the accuracy of a detection result are affected, and the detection efficiency is low.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the helium detection tool for the pressure sensor comprises an upper tool and a lower tool matched with the upper tool, wherein a sealing gasket is arranged on the lower tool corresponding to the upper tool, and the upper tool is connected with a lifting sealing mechanism;
the upper end of the lower jig is provided with a placing block, a plurality of placing grooves are formed in the placing block corresponding to the pressure sensor, a plurality of detecting blocks are embedded in the upper jig corresponding to the pressure sensor, detecting cavities are formed in copper pipes corresponding to the pressure sensor in the detecting blocks, accommodating cavities are formed in the lower end of the upper jig corresponding to the detecting blocks, an exhaust pipe is communicated with the accommodating cavities in the lower jig, and a mass spectrum leak detector is arranged on the exhaust pipe and connected to the exhaust end of the vacuum pump;
the lower side of the lower jig is provided with a push rod corresponding to the sliding column in a vertical sliding manner, and a jacking component is arranged below the push rod;
vent holes connected with the detection cavity are formed in the sliding column and the ejector rod, and a connecting port is formed in the side wall of the ejector rod and penetrates through the vent holes on the inner side of the ejector rod.
Preferably, corresponding compression rings are further arranged among the elastic sealing rings.
Preferably, the jacking assembly comprises a jacking air cylinder which is vertically and fixedly arranged below the lower jig and corresponds to the ejector rod, and the ejector rod is fixedly connected with the telescopic end of the jacking air cylinder.
Preferably, the upper end of the ejector rod is also provided with a buffer sealing gasket corresponding to the sliding column.
Preferably, the upper end of the lower jig is also provided with a plurality of positioning pins, and the lower end of the upper jig is provided with positioning grooves corresponding to the positioning pins.
Preferably, the lifting sealing mechanism comprises an upper jig and a plurality of upright posts vertically arranged outside the lower jig, a top plate and a bottom plate are respectively and horizontally fixed at the upper end and the lower end of the upright posts, the lower jig is fixedly arranged on the bottom plate, a servo electric cylinder is vertically and fixedly arranged at the upper end of the top plate, a telescopic end of the servo electric cylinder penetrates through the top plate and is horizontally and fixedly connected with a lifting plate, and the upper jig is fixedly arranged at the lower end of the lifting plate.
More preferably, a plurality of sliding sleeves are further vertically embedded in the top plate, guide posts are arranged in the sliding sleeves in a sliding mode, and the lower ends of the guide posts are fixedly connected to the top wall of the lifting plate.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the utility model, the sliding column is used for extruding the plurality of elastic sealing rings to enable the elastic sealing rings to expand inwards longitudinally to tightly hold and seal the copper pipe, so that the friction force between the elastic sealing rings and the copper pipe is improved, the copper pipe can bear larger atmospheric pressure and cannot loosen, and the accuracy of the detection result of the pressure sensor is ensured.
2. The helium detection tool can detect the welding effect of a plurality of pressure sensors at the same time, so that the detection efficiency of the pressure sensors is improved to a great extent, and the helium detection tool is matched with automatic sealing and vacuumizing between the upper tool and the lower tool, so that the detection of the pressure sensors is further facilitated.
The utility model has reasonable design and novel structure, can detect the atmospheric pressure of the pressure sensor, greatly improves the reliability of welding detection results, can detect a plurality of pressure sensors at the same time, and greatly improves the detection efficiency of the pressure sensor.
Drawings
FIG. 1 is a schematic diagram of the combination of the upper jig and the lower jig.
Fig. 2 is a schematic diagram of the structure of the upper fixture in the lifting process.
Fig. 3 is a schematic bottom view of the combination of the upper jig and the lower jig of the present utility model.
Fig. 4 is a bottom view of the upper fixture of the present utility model when lifted.
FIG. 5 is a schematic diagram of a jacking assembly and a pressure sensor according to the present utility model.
FIG. 6 is a schematic cross-sectional view of an exhaust tube of the present utility model.
FIG. 7 is a schematic diagram of a detection block according to the present utility model.
Fig. 8 is an enlarged view of the structure of the portion a of the present utility model.
In the figure: the upper jig 1, the accommodating chamber 11, the lower jig 2, the positioning pin 21, the sealing gasket 22, the detecting block 23, the detecting chamber 231, the slide column 24, the vent hole 241, the placing block 25, the placing groove 251, the exhaust pipe 26, the lifting sealing mechanism 3, the upright column 31, the bottom plate 32, the top plate 33, the sliding sleeve 331, the lifting plate 34, the guide column 341, the servo cylinder 35, the elastic sealing ring 4, the compression ring 41, the ejector rod 5, the buffer sealing gasket 51, the connecting port 52, the lifting cylinder 53, the pressure sensor 6 and the copper pipe 61.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Referring to fig. 1-8, a helium detection fixture for a pressure sensor comprises an upper fixture 1 and a lower fixture 2 matched with the upper fixture 1, wherein a sealing gasket 22 is arranged on the lower fixture 2 corresponding to the upper fixture 1, so that the sealing effect between the upper fixture 1 and the lower fixture 2 is ensured, and the upper fixture 1 is connected with a lifting sealing mechanism 3, so that the lifting of the upper fixture 1 is conveniently controlled, and the sealing and the separation of the upper fixture 1 and the lower fixture 2 are controlled.
The lower tool 2 upper end is equipped with places the piece 25, places and is equipped with a plurality of standing grooves 251 corresponding to pressure sensor 6 on the piece 25, carries out the joint fixedly to pressure sensor 6 through standing groove 251, conveniently carries out welded seal detection to a plurality of pressure sensor 6 simultaneously, go up still to inlay corresponding to pressure sensor 6 on the tool 1 and be equipped with a plurality of detection pieces 23, all correspond the copper pipe 61 of pressure sensor 6 in the detection piece 23 and be equipped with detection chamber 231, it still corresponds detection piece 23 and has offered accommodation chamber 11 to go up the tool 1 lower extreme, it is equipped with exhaust tube 26 to hold chamber 11 link up on the tool 2 down, is equipped with mass spectrum leak detector on the exhaust tube 26 and is connected to the exhaust end of vacuum pump, and wherein mass spectrum leak detector is the helium mass spectrum leak detector, when need detect pressure sensor 6, cooperates the exhaust tube 26 to go on the evacuation to go up the cavity between tool 1 and the tool 2 through the vacuum pump, conveniently cooperates detection piece 23 to detect pressure sensor 6.
The detection cavity 231 is internally provided with a plurality of elastic sealing rings 4 corresponding to the outer side of the copper pipe 61, the lower part of the detection cavity 231 is provided with a sliding column 24 corresponding to the elastic sealing rings 4 in a sliding manner, the lower side of the lower jig 2 is provided with a push rod 5 corresponding to the sliding column 24 in a vertical sliding manner, a jacking component is arranged below the push rod 5, and when helium is detected, the push rod 5 is matched with the jacking component to drive the sliding column 24 to ascend, so that the elastic sealing rings 4 are extruded, the copper pipe 61 is tightly adhered by inward radial expansion of the elastic sealing rings 4, the outer side of the copper pipe 61 is sealed, and the accuracy of helium detection of the pressure sensor 6 is ensured.
Vent holes 241 connected with the detection cavity 231 are formed in the sliding column 24 and the ejector rod 5, a connecting port 52 is formed in the vent holes 241 penetrating through the inner side of the side wall of the ejector rod 5, the connecting port 52 is connected to a helium high-pressure gas bottle, helium is introduced into the detection cavity 231 by matching the connecting port 52 and the vent holes 241 after helium detection preparation, the helium enters the copper pipe 61, if the pressure sensor 6 is welded with defects, the helium leaks to the outer side of the pressure sensor 6, namely, a cavity between the upper jig 1 and the lower jig 2, the helium mass spectrometer leak detector can detect the helium and alarm, and one or more pressure sensors 6 are provided with unqualified products, otherwise, the pressure sensor 6 is qualified.
Based on the above technical scheme, when carrying out helium to pressure sensor 6 and examining, lay a plurality of pressure sensor 6 in standing groove 251, fix pressure sensor 6, and guarantee that copper pipe 61 is in detecting chamber 231, start the jacking subassembly and drive slide column 24 and go upward, extrude elastic sealing washer 4 make its longitudinal expansion tightly seal to copper pipe 61, guarantee frictional force and the sealed effect of elastic sealing washer 4 and copper pipe 61, can bear bigger pressure and can not drop the gas leakage when guaranteeing the helium and examine, guarantee the accuracy that pressure sensor 6 detected, guarantee the sealed effect of copper pipe 61 department, after the preparation is accomplished, start the vacuum pump and carry out the evacuation to the cavity between upper jig 1 and the lower jig 2.
After the vacuumizing is completed, helium is introduced into the detection cavity 231 through the vent hole 241 by the helium high-pressure gas bottle, and the helium mass spectrometer leak detector is matched for sealing detection, if the helium leakage is detected, the fact that part of products in the pressure sensors 6 are unqualified in welding is indicated, otherwise, the fact that the products are sealed and qualified in welding is indicated, the detection accuracy of the pressure sensors 6 is guaranteed, the detection efficiency of the pressure sensors 6 is guaranteed, and the detection of the pressure sensors 6 is facilitated.
In this technical scheme, as shown in fig. 7 and 8, a plurality of corresponding compression rings 41 are further arranged between the elastic sealing rings 4, so as to ensure the extrusion effect between the elastic sealing rings 4, ensure the tightly-holding sealing effect between the elastic sealing rings 4 and the copper pipe 61, and ensure the helium detection effect of the pressure sensor 6.
In this technical scheme, as shown in fig. 1-7, the jacking component includes a jacking cylinder 53 that corresponds the vertical fixed setting of ejector pin 5 below the lower tool 2, and the telescopic end fixed connection of ejector pin 5 and jacking cylinder 53, carries out the control respectively to ejector pin 5 through small-size jacking cylinder 53 to make things convenient for the installation in proper order of a plurality of pressure sensor 6, guarantee the sealed effect of copper pipe 61 when pressure sensor 6 detects.
In this technical scheme, as shown in fig. 5-8, the upper end of the ejector rod 5 is further provided with a buffer sealing washer 51 corresponding to the sliding column 24, so as to ensure the sealing connection between the ejector rod 5 and the vent hole 241 in the sliding column 24, ensure the pressure of helium during helium detection, so as to improve the reliability of the detection result of the pressure sensor 6, and ensure the detection effect of the pressure sensor 6.
In this technical scheme, as shown in fig. 2, the upper end of lower tool 2 still is equipped with a plurality of locating pins 21, and go up tool 1 lower extreme and correspond locating pin 21 and offer the constant head tank, when last tool 1 merges sealedly with lower tool 2, guarantee through locating pin 21 that the position of going up tool 1 when merging is stable, guarantee the sealed effect of going up tool 1 and lower tool 2.
In this technical scheme, as shown in fig. 1-7, lifting seal mechanism 3 includes a plurality of stands 31 of the vertical setting in tool 1 and lower tool 2 outside, and the fixed roof 33 and the bottom plate 32 that are equipped with of level respectively in both ends about stand 31, and lower tool 2 fixed mounting is on bottom plate 32, the vertical fixed mounting in roof 33 upper end has servo cylinder 35, and servo cylinder 35's flexible end runs through roof 33 and horizontal fixedly connected with lifter plate 34, and goes up tool 1 fixed mounting in lifter plate 34 lower extreme, through the lift of servo cylinder 35 control lifter plate 34, guarantees the tight dynamics of adherence between tool 1 and the lower tool 2 of going up, guarantees the sealed effect between tool 1 and the lower tool 2 of going up to guarantee the accuracy of helium examination result.
In this technical scheme, as shown in fig. 1-6, a plurality of sliding sleeves 331 are further vertically embedded in the top plate 33, guide columns 341 are slidably arranged in the sliding sleeves 331, the lower ends of the guide columns 341 are fixedly connected to the top wall of the lifting plate 34, the sliding stability of the lifting plate 34 is improved, and stable butt joint sealing of the upper jig 1 and the lower jig 2 is ensured.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (7)
1. The helium detection tool for the pressure sensor is characterized by comprising an upper tool (1) and a lower tool (2) matched with the upper tool, wherein a sealing gasket (22) is arranged on the lower tool (2) corresponding to the upper tool (1), and the upper tool (1) is connected with a lifting sealing mechanism (3);
the upper end of the lower jig (2) is provided with a placement block (25), a plurality of placement grooves (251) are formed in the placement block (25) corresponding to the pressure sensors (6), a plurality of detection blocks (23) are embedded in the upper jig (1) corresponding to the pressure sensors (6), detection cavities (231) are formed in copper tubes (61) corresponding to the pressure sensors (6) in the detection blocks (23), accommodating cavities (11) are formed in the lower end of the upper jig (1) corresponding to the detection blocks (23), exhaust pipes (26) are arranged on the lower jig (2) corresponding to the accommodating cavities (11) in a penetrating mode, and an air extraction end of the mass spectrum leak detector is arranged on the exhaust pipes (26) and connected to a vacuum pump;
a plurality of elastic sealing rings (4) are arranged in the detection cavity (231) corresponding to the outer side of the copper pipe (61), a sliding column (24) is slidably arranged at the lower part of the detection cavity (231) corresponding to the elastic sealing rings (4), a push rod (5) is vertically slidably arranged at the lower side of the lower jig (2) corresponding to the sliding column (24), and a jacking component is arranged below the push rod (5);
vent holes (241) connected with the detection cavity (231) are formed in the sliding column (24) and the ejector rod (5), and a connecting port (52) is formed in the side wall of the ejector rod (5) and penetrates through the vent holes (241) on the inner side of the ejector rod.
2. A pressure sensor helium testing fixture according to claim 1, characterized in that a plurality of said elastic sealing rings (4) are further provided with corresponding compression rings (41) therebetween.
3. The helium detection fixture of the pressure sensor according to claim 1, wherein the jacking component comprises a jacking cylinder (53) which is vertically and fixedly arranged below the lower fixture (2) and corresponds to the ejector rod (5), and the ejector rod (5) is fixedly connected with the telescopic end of the jacking cylinder (53).
4. The helium detection fixture of the pressure sensor according to claim 1, wherein the upper end of the ejector rod (5) is further provided with a buffer sealing gasket (51) corresponding to the sliding column (24).
5. The helium detection fixture of the pressure sensor of claim 1, wherein a plurality of positioning pins (21) are further arranged at the upper end of the lower fixture (2), and positioning grooves are formed in the lower end of the upper fixture (1) corresponding to the positioning pins (21).
6. The helium detection fixture of a pressure sensor according to claim 1, wherein the lifting sealing mechanism (3) comprises an upper fixture (1) and a plurality of upright posts (31) which are vertically arranged outside the lower fixture (2), a top plate (33) and a bottom plate (32) are respectively and horizontally fixed at the upper end and the lower end of the upright posts (31), the lower fixture (2) is fixedly arranged on the bottom plate (32), a servo electric cylinder (35) is vertically and fixedly arranged at the upper end of the top plate (33), a telescopic end of the servo electric cylinder (35) penetrates through the top plate (33) and is horizontally and fixedly connected with a lifting plate (34), and the upper fixture (1) is fixedly arranged at the lower end of the lifting plate (34).
7. The helium detection fixture of claim 6, wherein a plurality of sliding sleeves (331) are further vertically embedded in the top plate (33), guide posts (341) are slidably arranged in the sliding sleeves (331), and the lower ends of the guide posts (341) are fixedly connected to the top wall of the lifting plate (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321633135.2U CN220018858U (en) | 2023-06-26 | 2023-06-26 | Pressure sensor helium detection tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321633135.2U CN220018858U (en) | 2023-06-26 | 2023-06-26 | Pressure sensor helium detection tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220018858U true CN220018858U (en) | 2023-11-14 |
Family
ID=88677653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321633135.2U Active CN220018858U (en) | 2023-06-26 | 2023-06-26 | Pressure sensor helium detection tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220018858U (en) |
-
2023
- 2023-06-26 CN CN202321633135.2U patent/CN220018858U/en active Active
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