CN217084098U - Oxygen sensor leakage measurement tool - Google Patents
Oxygen sensor leakage measurement tool Download PDFInfo
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- CN217084098U CN217084098U CN202123396495.9U CN202123396495U CN217084098U CN 217084098 U CN217084098 U CN 217084098U CN 202123396495 U CN202123396495 U CN 202123396495U CN 217084098 U CN217084098 U CN 217084098U
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Abstract
An oxygen sensor leakage measurement tool comprises a low-pressure cavity and a high-pressure cavity. One end of an air passage of the low-pressure cavity is communicated with a low-pressure cavity workpiece positioning socket, and the other end of the air passage of the low-pressure cavity is communicated with an instrument measuring port. One end of an air passage of the high-pressure cavity is communicated with a high-pressure cavity workpiece positioning socket, and the other end of the air passage of the high-pressure cavity is communicated with a high-pressure air inlet. The opening parts of the low-pressure workpiece positioning socket and the high-pressure workpiece positioning socket are respectively provided with a sealing part, so that when the high-pressure air inlet and the instrument measuring port are plugged, a workpiece air passage in the workpiece, a low-pressure cavity air passage in the low-pressure cavity and a high-pressure cavity air passage in the high-pressure cavity, which are inserted into the low-pressure cavity workpiece positioning socket and the high-pressure cavity workpiece positioning socket respectively, at two ends can form a closed cavity. The utility model discloses can improve oxygen sensor's leakage measurement precision by a wide margin to improve automobile parts assembly process's yield and automatic level.
Description
Technical Field
The utility model relates to a measurement technology of automobile parts especially relates to oxygen sensor's leakage measurement frock.
Background
The leakage value of a 1-generation product of the existing oxygen sensor is 2ccm @340kp, a direct measurement method is adopted, and the measurement precision is 0.1ccm @340 kpa. The leakage value of the 2 generation product is 0.2ccm @340kpa, the required measurement precision is 0.01ccm @340kpa, and the existing measurement tool cannot meet the requirement of the measurement precision.
Therefore, a product is needed to solve the above problems, and a measuring tool capable of meeting the above requirement of measuring accuracy is designed, so as to overcome the above defects of the prior art, and improve the yield and the automation level of the assembly process of the automobile parts.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an oxygen sensor leaks and measures frock can improve oxygen sensor's leakage measurement precision by a wide margin to improve automobile parts assembly process's yield and automatic level.
In order to achieve the above object, the utility model provides an oxygen sensor leaks and measures frock includes low-pressure chamber and high-pressure chamber. One end of an air passage of the low-pressure cavity is communicated with a low-pressure cavity workpiece positioning socket, and the other end of the air passage of the low-pressure cavity is communicated with an instrument measuring port. One end of an air passage of the high-pressure cavity is communicated with a high-pressure cavity workpiece positioning socket, and the other end of the air passage of the high-pressure cavity is communicated with a high-pressure air inlet. The opening parts of the low-pressure cavity workpiece positioning socket and the high-pressure cavity workpiece positioning socket are respectively provided with a sealing piece, so that when the high-pressure air inlet and the instrument measuring port are plugged, a workpiece air passage in the workpiece in the low-pressure cavity workpiece positioning socket and the high-pressure cavity workpiece positioning socket, a low-pressure cavity air passage in the low-pressure cavity and a high-pressure cavity air passage in the high-pressure cavity can form a sealed cavity body, wherein the two ends of the workpiece air passage are respectively plugged in the low-pressure cavity workpiece positioning socket and the high-pressure cavity workpiece positioning socket.
Preferably, the oxygen sensor leakage measuring tool further comprises a clamping structure. When the first end of the workpiece is inserted into the positioning socket of the low-pressure cavity, the clamping structure presses the positioning socket of the high-pressure cavity to the workpiece, so that the second end of the workpiece is inserted into the positioning socket of the high-pressure cavity, the workpiece is clamped in the high-pressure cavity and the low-pressure cavity, and the high-pressure cavity air passage, the low-pressure cavity air passage and the workpiece air passage can form a closed cavity when the high-pressure air inlet and the instrument measuring port are blocked.
Preferably, the clamping structure comprises a compression bar, and the high-pressure chamber is arranged above the low-pressure chamber. When the compression rod is compressed, the high-pressure cavity is pushed to be pressed towards the low-pressure cavity, so that the workpiece is clamped in the high-pressure cavity and the low-pressure cavity, and when the high-pressure air inlet and the instrument measuring port are blocked, the high-pressure cavity air passage, the low-pressure cavity air passage and the workpiece air passage can form a closed cavity.
Preferably, the clamping structure further comprises a press handle. The pressing handle is a lever with an L-shaped structure. The upper end of the pressure lever is rotatably connected with an L-shaped foot at the lower end of the L-shaped structure lever, and the lower end of the pressure lever is positioned above the high-pressure cavity. The top of the lever is provided with a handle. The pressure bar lifts the high pressure chamber when the handle is lifted. When the handle is pressed down, the pressing rod presses the high-pressure cavity to move towards the low-pressure cavity so as to clamp the high-pressure cavity and the low-pressure cavity, so that when the high-pressure air inlet and the instrument measuring port are blocked, the high-pressure cavity air passage, the low-pressure cavity air passage and the workpiece air passage can form a closed cavity.
Preferably, the clamping structure further comprises a spring; the compression bar penetrates into the spring. The upper end of the spring is fixed on the pressure rod, and the lower end of the spring is supported on the high-pressure cavity or the supporting plate above the high-pressure cavity. When the pressure handle is lifted, the spring extends to enable the high-pressure cavity to be stressed and lifted, and the high-pressure cavity and the low-pressure cavity are separated, so that the workpiece is separated from the high-pressure cavity and the low-pressure cavity. When the pressing handle is pressed down, the spring is compressed to reset and clamp the high-pressure cavity and the low-pressure cavity, so that when the high-pressure air inlet and the instrument measuring port are plugged, the high-pressure cavity air passage, the low-pressure cavity air passage and the workpiece air passage can form a closed cavity.
Preferably, the clamping structure further comprises a positioning bracket. The positioning support comprises a positioning rod, and a top plate, a supporting plate and a bottom plate which are sequentially arranged from top to bottom. And the top plate, the supporting plate and the bottom plate are provided with positioning jacks and pressure rod holes. The locating rod passes through the locating jacks of the top plate, the supporting plate and the bottom plate in sequence. The pressure bar passes through the pressure bar holes of the top plate, the supporting plate and the bottom plate respectively in sequence. The supporting plate is fixed above the high-pressure cavity. The top plate is fixed below the pressing handle. A low-pressure cavity is arranged in the bottom plate, and a vent pipeline of the low-pressure cavity extends out of the bottom plate; the opening of the ventilation pipeline is an instrument measuring port. When the pressing handle is pressed downwards, the pressing rod and the positioning rod are both pressed downwards, so that the pressing rod extrudes the supporting plate, the supporting plate extrudes the high-pressure cavity downwards to move towards the low-pressure cavity, and the bottom of the positioning rod is pressed into the positioning insertion hole of the bottom plate to realize positioning.
Preferably, the low-pressure cavity is an L-shaped structure air channel. The low-pressure cavity workpiece positioning socket at the top of the L-shaped structure air passage is communicated with an air port at the bottom of the workpiece. The air port at the top of the workpiece is communicated with the workpiece positioning socket of the high-pressure cavity.
Preferably, the lower end of the L-shaped structure lever is provided with two pairs of L-shaped feet. One pair of L-shaped legs is rotatably connected with the rod head at the upper end of the compression rod, and the other pair of L-shaped legs is rotatably connected with the convex positioning supporting block at the upper end of the compression rod. The compression bar passes through a through hole in the center of the convex positioning support block. The positioning insertion holes of the top plate are matched with the peripheries of the raised positioning supporting blocks, and the bottoms of the supporting blocks are embedded into the positioning insertion holes of the top plate.
Preferably, the sealing member is a gasket. The low-pressure cavity workpiece positioning socket is matched with the first end of the workpiece in shape. The high-pressure cavity workpiece positioning socket is matched with the second end of the workpiece in shape.
Preferably, the meter measuring port is communicated with a meter connecting valve for connecting the measuring meter with the low-pressure gas input device. The high-pressure air inlet is communicated with an air pipe connecting valve used for connecting high-pressure air input equipment.
Compared with the prior art, the utility model discloses can improve oxygen sensor's leakage measurement precision by a wide margin to improve automobile parts assembly process's yield and automatic level.
The utility model discloses oxygen sensor leakage measurement accuracy has been improved. The utility model discloses a support one set of frock structure that adopts indirect measurement method, this structure can improve oxygen sensor's leakage measurement precision to 0.01ccm from 0.1ccm, and then improves the measurement accuracy that oxygen sensor leaked by a wide margin to satisfy the quality testing demand of new generation product.
Drawings
Fig. 1 is a schematic sectional structure diagram of the high-pressure chamber and the low-pressure chamber of the present invention.
Fig. 2 is the utility model discloses a spatial structure sketch map of oxygen sensor leak testing frock.
Fig. 3 is a schematic perspective view of the clamping structure of the present invention.
Fig. 4 is a perspective view of the clamping structure of the present invention.
Detailed Description
Hereinafter, embodiments of the oxygen sensor leak measurement tool of the present invention will be described with reference to the accompanying drawings.
The embodiments described herein are specific embodiments of the present invention, and are intended to be illustrative of the concepts of the present invention, which are intended to be illustrative and exemplary, and should not be construed as limiting the scope of the embodiments and the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which employ any obvious replacement or modification of the embodiments described herein.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of the respective portions and the mutual relationships thereof. It should be noted that the drawings are not necessarily drawn to the same scale in order to clearly illustrate the structures of the various components of the embodiments of the present invention. The same reference numerals are used to designate the same or similar parts. Further, when the description is made with reference to the drawings, directional words such as "upper", "lower", etc. are employed for convenience of description, and they do not constitute specific limitations on the structure of the features.
Example one
As shown in fig. 1, in this embodiment, the oxygen sensor leak measurement tool includes a low pressure chamber 5 and a high pressure chamber 2. One end of an air passage of the low-pressure cavity 5 is communicated with a low-pressure cavity workpiece positioning socket, and the other end of the air passage is communicated with an instrument measuring port 4. One end of an air passage of the high-pressure cavity 2 is communicated with a high-pressure cavity workpiece positioning socket, and the other end of the air passage is communicated with a high-pressure air inlet 3. The opening parts of the low-pressure cavity workpiece positioning socket and the high-pressure cavity workpiece positioning socket are respectively provided with a sealing piece, so that when the high-pressure air inlet 3 and the instrument measuring port 4 are plugged, a workpiece air passage in a workpiece in the low-pressure cavity workpiece positioning socket and the high-pressure cavity workpiece positioning socket, a low-pressure cavity 5 air passage in the low-pressure cavity 5 and a high-pressure cavity 2 air passage in the high-pressure cavity 2 can form a closed cavity body.
The present embodiment further preferably has the low pressure chamber 5 with an L-shaped structure air passage. The low-pressure cavity workpiece positioning socket at the top of the L-shaped structure air passage is communicated with an air port at the bottom of the workpiece. The air port at the top of the workpiece is communicated with the workpiece positioning socket of the high-pressure cavity.
The present embodiment further preferably provides that the sealing means are sealing rings (6, 7). The sealing rings (6, 7) comprise a low-pressure cavity sealing ring 6 and a high-pressure cavity sealing ring 7. The low-pressure cavity workpiece positioning socket is matched with the first end of the workpiece in shape. The high-pressure cavity workpiece positioning socket is matched with the second end of the workpiece in shape.
The present embodiment further preferably has the meter measuring port 4 communicated with a meter connecting valve for connecting the measuring meter with the low-pressure gas input device. The high-pressure air inlet 3 is communicated with a vent pipeline connecting valve used for connecting high-pressure gas input equipment.
The prior art adopts a direct measurement method: do not possess among the prior art the utility model discloses an instrument measurement mouth 4. Therefore, in the prior art, the measuring port 4 of the instrument is equivalently sealed, the pipeline of the leakage detector is connected with the high-pressure air inlet 3, 340Kpa gas passes through the high-pressure air inlet 3 and enters the oxygen sensor 1 after coming out of the leakage detector, and if the oxygen sensor 1 leaks, the high-pressure gas enters the air channel of the oxygen sensor 1 through the air channel port at the top of the oxygen sensor 1 and then enters the measuring unit communicated with the air channel port at the bottom of the oxygen sensor 1 through the air channel port at the bottom of the oxygen sensor 1. Due to the leakage, the pressure of 340Kpa gradually decreases, and the value of the decrease is proportional to the product leakage value, so that the product leakage value is obtained according to the pressure decrease value measured by the measuring unit.
The utility model discloses an indirect measurement method: the utility model discloses possess instrument measurement mouth 4. The pipeline of the measuring instrument is connected with the measuring port 4 of the instrument, 40kpa of gas sequentially enters the measuring unit through the measuring port 4 of the instrument, and the air passage of the low-pressure cavity 5 enters the lower air passage of the oxygen sensor 1 through the air port at the bottom of the oxygen sensor 1. The gas of 340kpa passes through the high-pressure inlet 3 and enters the upper airway of the oxygen sensor 1 through the airway opening of the oxygen sensor 1. If the oxygen sensor 1 has leakage, the upper airway and the lower airway of the oxygen sensor 1 are communicated through the leakage port, so that high-pressure gas sequentially passes through the upper airway and the lower airway of the oxygen sensor 1 and is discharged through the airway of the low-pressure cavity 5 to enter a measuring unit of a measuring port of a sealed connecting instrument at the end of the airway. The pressure of the measuring cell gradually rises from 40kpa, and the rising value is proportional to the leakage value of the oxygen sensor 1, so that the product leakage value is obtained according to the pressure rising value of the measuring port 4 of the meter.
Compared with the prior art, the utility model discloses can improve oxygen sensor 1's leakage measurement precision by a wide margin to improve automobile parts assembly process's yield and automatic level.
The utility model discloses oxygen sensor 1 leakage measurement accuracy has been improved. The utility model discloses a support one set of frock structure that adopts indirect measurement method, this structure can improve the leakage measurement precision of oxygen sensor 1 to 0.01ccm from 0.1ccm, and then improves the measurement precision that oxygen sensor 1 leaked by a wide margin to satisfy the quality testing demand of new generation product. The resolution of the measuring instrument is related to the measuring range, the larger the measuring range is, the worse the resolution is, the smaller the measuring range is, and the better the resolution is. The prior art tooling structure must employ a direct measurement method with a pressure reference of 340kpa, a leak gauge range of 500kpa, and a gauge resolution of 0.1. The utility model discloses a frock structure supports indirect measurement method, and the pressure benchmark of this measurement method is 40kpa, and the instrument range of leakage appearance is 50kpa, and is littleer than prior art range, and its measurement resolution is 0.01. Therefore, the utility model discloses an improve frock structure and make it support indirect measurement method, realized 0.01 measurement resolution.
The utility model discloses an installation and leakage measurement step of oxygen sensor 1 are as follows: the operator manually places the oxygen sensor 1 into the high-pressure chamber 2, and locks the work sealing unit of the high-pressure chamber 2. The workpiece sealing unit is composed of a socket and a sealing element. Seals 6 and 7 separate the high pressure chamber 2 from the low pressure chamber 5. The sealing elements are sealing rings (6, 7). High-pressure gas of 340Kpa is fed from a high-pressure inlet 3, and low-pressure gas of 4Kpa is fed from an instrument measuring port 4. Referring to the indirect measurement principle above, if the product leaks, the high pressure gas passes from the high pressure chamber 2 through the product into the low pressure chamber 5 and then into the measuring instrument, where the pressure of the measuring instrument rises. The leakage of the high pressure cavity 2 at the high pressure end is indirectly measured by measuring the pressure change of the low pressure cavity 5 at the low pressure end, and the range of the meter is reduced from 500 to 50, which is 10 percent of the original range, so the resolution is reduced from 0.1 to 0.01. The utility model discloses the frock can adopt indirect measurement method and small-scale range instrument to measure the leakage, has effectively improved leakage measurement resolution, can satisfy high accuracy measurement's requirement.
Compared with the prior art, the utility model discloses can improve oxygen sensor 1's leakage measurement precision by a wide margin to improve automobile parts assembly process's yield and automatic level.
The utility model discloses oxygen sensor 1 leakage measurement precision has been improved. The utility model discloses a support one set of frock structure that adopts indirect measurement method, this structure can improve the leakage measurement precision of oxygen sensor 1 to 0.01ccm from 0.1ccm, and then improves the measurement precision that oxygen sensor 1 leaked by a wide margin to satisfy the quality testing demand of new generation product.
Example two
The difference of the second embodiment compared to the first embodiment is that the oxygen sensor leak measurement tool further comprises a clamping structure as shown in fig. 4. When the first end of the workpiece is inserted into the positioning socket of the low-pressure cavity 5, the clamping structure presses the positioning socket of the high-pressure cavity 2 to the workpiece, so that the second end of the workpiece is inserted into the positioning socket of the high-pressure cavity 2, the workpiece is clamped in the high-pressure cavity 5, and the air passage of the high-pressure cavity 2, the air passage of the low-pressure cavity 5 and the air passage of the workpiece can form a closed cavity when the high-pressure air inlet 3 and the instrument measuring port 4 are blocked.
It is further preferred that the clamping structure comprises a pressure bar 12, as shown in fig. 3, the high pressure chamber 2 being arranged above the low pressure chamber 5. When the compression rod 12 is compressed, the high-pressure cavity 2 is pushed to press the low-pressure cavity 5, so that a workpiece is clamped in the high-pressure cavity 5 and the low-pressure cavity 5, and the air passage of the high-pressure cavity 2, the air passage of the low-pressure cavity 5 and the air passage of the workpiece can form a closed cavity when the high-pressure air inlet 3 and the instrument measuring port 4 are blocked.
It is further preferred in this embodiment that the clamping structure further comprises a press handle 8, as shown in fig. 2. The pressing handle 8 is an L-shaped structure lever. The upper end of the pressure lever 12 is rotatably connected with L-shaped legs (81, 82) at the lower end of the L-shaped structure lever, and the lower end is positioned above the high-pressure cavity 2. The top of the lever is provided with a handle. The plunger 12 lifts the high pressure chamber 2 when the handle is lifted. When the handle is pressed down, the pressure rod 12 presses down the pressure high-pressure cavity 2 to move towards the low-pressure cavity 5 so as to clamp the high-pressure cavity 5 and the low-pressure cavity 5, so that when the high-pressure air inlet 3 and the instrument measuring port 4 are blocked, the air passage of the high-pressure cavity 2, the air passage of the low-pressure cavity 5 and the air passage of the workpiece can form a closed cavity.
This embodiment is further preferred, as shown in fig. 2, that the clamping structure further comprises a spring 13. The plunger 12 penetrates the spring 13. The upper end of the spring 13 is fixed to the pressure bar 12 and the lower end is supported on the high-pressure chamber 2 or on the support plate 10 above the high-pressure chamber 2. When the pressure handle 8 is lifted, the spring 13 extends to enable the high-pressure cavity 2 to be lifted under stress, and the high-pressure cavity 5 and the low-pressure cavity 5 are separated, so that the workpiece is separated from the high-pressure cavity 5 and the low-pressure cavity 5. When the pressure handle 8 is pressed down, the spring 13 is compressed to reset to clamp the high-pressure cavity and the low-pressure cavity 5, so that when the high-pressure air inlet 3 and the instrument measuring port 4 are plugged, the air passage of the high-pressure cavity 2, the air passage of the low-pressure cavity 5 and the air passage of the workpiece can form a closed cavity.
This embodiment is further preferred, as shown in fig. 2, that the clamping structure further comprises a positioning bracket. The positioning support comprises a positioning rod 14, and a top plate 9, a supporting plate 10 and a bottom plate 11 which are sequentially arranged from top to bottom. The top plate 9, the supporting plate 10 and the bottom plate 11 are provided with positioning insertion holes and pressure rod holes. The positioning rod 14 passes through the positioning insertion holes of the top plate 9, the supporting plate 10 and the bottom plate 11 in sequence. The compression bar 12 passes through the compression bar holes of the top plate 9, the support plate 10 and the bottom plate 11 in sequence. The support plate 10 is fixed above the high pressure chamber 2. The top plate 9 is fixed below the pressing handle 8. A low-pressure cavity 5 is arranged in the bottom plate 11, and an air duct of the low-pressure cavity 5 extends out of the bottom plate 11; the opening of the ventilation pipeline is an instrument measuring port 4. When the pressing handle 8 is pressed downwards, the pressing rod 12 and the positioning rod 14 are both pressed downwards, so that the pressing rod 12 extrudes the support plate 10, the support plate 10 extrudes the high-pressure cavity 2 downwards and moves towards the low-pressure cavity 5, and meanwhile, the bottom of the positioning rod 14 is pressed into the positioning insertion hole of the bottom plate 11 to realize positioning.
The present embodiment further preferably has two pairs of L-shaped legs (81, 82) at the lower end of the L-shaped structure lever, as shown in fig. 2. One pair of L-shaped legs (81, 82) rotatably connects the heads of the upper ends of the pressing rods 12, and the other pair of L-shaped legs rotatably connects the protruding positioning support blocks 15 of the upper ends of the pressing rods 12. The press rod 12 passes through a through hole in the center of the boss positioning support block 15. The positioning insertion hole of the top plate 9 is matched with the periphery of the raised positioning support block 15, and the bottom of the support block is embedded into the positioning insertion hole of the top plate 9.
The utility model discloses a high pressure chamber 2 and low pressure chamber 5 press from both sides tight step as follows: the clamping structure is provided with a handle, the handle is lifted upwards, the high-pressure cavity 2 runs upwards and is separated from the oxygen sensor 1 and the low-pressure cavity 5, and the oxygen sensor 1 can be taken and placed. After putting into low pressure chamber 5 with oxygen sensor 1, oxygen sensor 1 contacts with the sealing member 6 in low pressure chamber 5, and the handle pushes down, and high pressure chamber 2 moves down, and the sealing member 7 and the oxygen sensor 1 contact of high pressure chamber 2, the tight back of frock clamp, sealing washer (6, 7) keep apart high pressure chamber 2 and low pressure chamber 5, and high-pressure gas can only enter into low pressure chamber 5 through the leak path of oxygen sensor 1.
Compared with the prior art, the utility model discloses can improve oxygen sensor 1's leakage measurement precision by a wide margin to improve automobile parts assembly process's yield and automatic level.
The utility model discloses oxygen sensor 1 leakage measurement precision has been improved. The utility model discloses a support one set of frock structure that adopts indirect measurement method, this structure can improve the leakage measurement precision of oxygen sensor 1 to 0.01ccm from 0.1ccm, and then improves the measurement precision that oxygen sensor 1 leaked by a wide margin to satisfy the quality testing demand of new generation product.
The above is to explain the embodiment of the oxygen sensor leakage measurement tool of the present invention, and the purpose thereof is to explain the spirit of the present invention. Note that those skilled in the art can modify and combine the features of the above-described embodiments without departing from the spirit of the present invention, and therefore, the present invention is not limited to the above-described embodiments. The specific features of the oxygen sensor leak measurement tool of the present invention, such as shape, size and position, can be specifically designed by the action of the features disclosed above, and such designs can be achieved by those skilled in the art. Moreover, the technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the invention to achieve the aim of the invention.
Claims (10)
1. The oxygen sensor leakage measuring tool is characterized by comprising a low-pressure cavity and a high-pressure cavity; wherein the content of the first and second substances,
one end of an air passage of the low-pressure cavity is communicated with a low-pressure cavity workpiece positioning socket, and the other end of the air passage of the low-pressure cavity is communicated with an instrument measuring port;
one end of an air passage of the high-pressure cavity is communicated with a high-pressure cavity workpiece positioning socket, and the other end of the air passage of the high-pressure cavity is communicated with a high-pressure air inlet;
the opening parts of the low-pressure cavity workpiece positioning socket and the high-pressure cavity workpiece positioning socket are respectively provided with a sealing part, so that when the high-pressure air inlet and the instrument measuring port are plugged, the two ends of the workpiece air passage in the workpiece in the low-pressure cavity workpiece positioning socket and the workpiece in the high-pressure cavity workpiece positioning socket are respectively plugged, and the low-pressure cavity air passage in the low-pressure cavity and the high-pressure cavity air passage in the high-pressure cavity can form a closed cavity.
2. The oxygen sensor leakage measurement tool of claim 1, further comprising a clamping structure; wherein the content of the first and second substances,
when the first end of the workpiece is inserted into the positioning socket of the low-pressure cavity, the clamping structure presses the positioning socket of the high-pressure cavity to the workpiece, so that the second end of the workpiece is inserted into the positioning socket of the high-pressure cavity, the workpiece is clamped in the high-pressure cavity and the low-pressure cavity, and the high-pressure cavity air passage, the low-pressure cavity air passage and the workpiece air passage can form a closed cavity when the high-pressure air inlet and the instrument measuring port are blocked.
3. The oxygen sensor leakage measurement tool of claim 2,
the clamping structure comprises a pressure lever, and the high-pressure cavity is arranged above the low-pressure cavity; wherein the content of the first and second substances,
when the compression rod is compressed, the high-pressure cavity is pushed to be pressed towards the low-pressure cavity, so that a workpiece is clamped in the high-pressure cavity and the low-pressure cavity, and when the high-pressure air inlet and the instrument measuring port are blocked, the high-pressure cavity air passage, the low-pressure cavity air passage and the workpiece air passage can form a closed cavity.
4. The oxygen sensor leakage measuring tool of claim 3, wherein the clamping structure further comprises a press handle; wherein the pressing handle is an L-shaped structure lever;
the upper end of the pressure lever is rotatably connected with an L-shaped foot at the lower end of the L-shaped structure lever, and the lower end of the pressure lever is positioned above the high-pressure cavity;
the top of the lever is provided with a handle; and the number of the first and second electrodes,
the pressure lever lifts the high pressure chamber when the handle is lifted;
when the handle is pressed down, the pressing rod presses down to extrude the high-pressure cavity to move towards the low-pressure cavity so as to clamp the high-pressure cavity and the low-pressure cavity, so that when the high-pressure air inlet and the instrument measuring port are blocked, the high-pressure cavity air passage, the low-pressure cavity air passage and the workpiece air passage can form a closed cavity.
5. The oxygen sensor leakage measurement tool of claim 4,
the clamping structure further comprises a spring; the compression bar penetrates into the spring; and the number of the first and second electrodes,
the upper end of the spring is fixed on the pressure rod, and the lower end of the spring is supported on the high-pressure cavity or the supporting plate above the high-pressure cavity;
when the pressure handle is lifted, the spring extends, the high-pressure cavity is lifted by force, and the high-pressure cavity and the low-pressure cavity are separated, so that the workpiece is separated from the high-pressure cavity and the low-pressure cavity;
when the pressing handle is pressed down, the spring is compressed, reset and clamped to the high-pressure cavity and the low-pressure cavity, so that when the high-pressure air inlet and the instrument measuring port are plugged, the high-pressure cavity air passage, the low-pressure cavity air passage and the workpiece air passage can form a closed cavity.
6. The oxygen sensor leakage measuring tool according to claim 5, wherein the clamping structure further comprises a positioning bracket; wherein the content of the first and second substances,
the positioning bracket comprises a positioning rod, and a top plate, a supporting plate and a bottom plate which are sequentially arranged from top to bottom;
the top plate, the supporting plate and the bottom plate are provided with positioning jacks and pressure rod holes;
the positioning rod sequentially penetrates through the positioning jacks of the top plate, the supporting plate and the bottom plate; the pressure rods respectively penetrate through the pressure rod holes of the top plate, the supporting plate and the bottom plate in sequence;
the supporting plate is fixed above the high-pressure cavity;
the top plate is fixed below the pressing handle;
the low-pressure cavity is arranged in the bottom plate, and an air duct of the low-pressure cavity extends out of the bottom plate; the opening of the ventilation pipeline is the measuring port of the instrument;
when the pressing handle is pressed downwards, the pressing rod and the positioning rod are both pressed downwards, so that the pressing rod extrudes the supporting plate, the supporting plate extrudes the high-pressure cavity downwards to move towards the low-pressure cavity, and the bottom of the positioning rod is pressed into the positioning insertion hole of the bottom plate to realize positioning.
7. The oxygen sensor leakage measurement tool of claim 1,
the low-pressure cavity is an L-shaped structure air passage; wherein the content of the first and second substances,
the low-pressure cavity workpiece positioning socket at the top of the L-shaped structure air passage is communicated with a workpiece bottom air port; and the workpiece top air port is communicated with the high-pressure cavity workpiece positioning socket.
8. The oxygen sensor leakage measurement tool of claim 6,
the lower end of the L-shaped structure lever is provided with two pairs of L-shaped feet;
one pair of L-shaped legs is rotatably connected with the rod head at the upper end of the pressure rod, and the other pair of L-shaped legs is rotatably connected with the convex positioning supporting block at the upper end of the pressure rod;
the compression bar penetrates through a through hole in the center of the convex positioning support block;
the positioning insertion holes of the top plate are matched with the peripheries of the protruding positioning supporting blocks, and the bottoms of the supporting blocks are embedded into the positioning insertion holes of the top plate.
9. The oxygen sensor leakage measurement tool of claim 1,
the sealing element is a sealing ring;
the low-pressure cavity workpiece positioning socket is matched with the first end of the workpiece in shape;
the high-pressure cavity workpiece positioning socket is matched with the second end of the workpiece in shape.
10. The oxygen sensor leakage measurement tool of claim 1,
the instrument measuring port is communicated with a measuring instrument connecting valve used for connecting a measuring instrument and low-pressure gas input equipment;
the high-pressure air inlet is communicated with an air pipe connecting valve used for connecting high-pressure air input equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123396495.9U CN217084098U (en) | 2021-12-30 | 2021-12-30 | Oxygen sensor leakage measurement tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123396495.9U CN217084098U (en) | 2021-12-30 | 2021-12-30 | Oxygen sensor leakage measurement tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217084098U true CN217084098U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123396495.9U Active CN217084098U (en) | 2021-12-30 | 2021-12-30 | Oxygen sensor leakage measurement tool |
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|---|---|
| CN (1) | CN217084098U (en) |
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2021
- 2021-12-30 CN CN202123396495.9U patent/CN217084098U/en active Active
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