CN109374232B - Leakage detection device and method for detecting leakage performance of flange plate assembly by using same - Google Patents
Leakage detection device and method for detecting leakage performance of flange plate assembly by using same Download PDFInfo
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- CN109374232B CN109374232B CN201811434324.0A CN201811434324A CN109374232B CN 109374232 B CN109374232 B CN 109374232B CN 201811434324 A CN201811434324 A CN 201811434324A CN 109374232 B CN109374232 B CN 109374232B
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The device comprises a feeding device, a pressing device and a detection device, wherein the pressing device is used for pressing a workpiece to be detected, a pressing cylinder is connected with a pressing head I and a pressing head II which are corresponding to the shape of a flange plate, the feeding device is used for conveying the workpiece to a detection station, the shape of a flange plate positioning module corresponds to the shape of the flange plate of a flange plate assembly, the detection device is used for detecting leakage, a driving cylinder of the device is respectively connected with an external control system, and the leakage detection device is respectively provided with a proximity switch, a pressing sensor, a blocking sensor and a leakage sensor; the detection device has the advantages of compact structure, wide application range, quick workpiece replacement, easy automation realization, simple and accurate detection method, safety and reliability, and the whole detection can simultaneously complete the detection of two workpieces by only one worker operation and one clamping, thereby greatly improving the production efficiency and reducing the labor intensity.
Description
Technical Field
The invention relates to a device and a method for detecting oil gas leakage performance of automobile parts, in particular to a device and a method for detecting leakage performance of a flange plate assembly of an electric fuel pump assembly for an oil supply system of an automobile engine.
Background
The flange plate component of the fuel pump assembly of the automobile electric fuel pump assembly refers to the flange plate component of the fuel pump assembly of the automobile engine fuel supply system, and after the assembly is completed, the oil gas leakage is detected and does not exceed the specified technical index value, and the traditional detection flow is as follows: 1) placing the flange plate in a clamp manually, 2) manually operating the clamp to press the flange plate assembly at a fixed position and plug a sealing and conveying oil return nozzle (an oil conveying and returning pipe joint), 3) filling pressure gas into a sealing inner cavity of the flange plate and the clamp plate and maintaining pressure, and 4) judging the display value of the pressure gauge.
The defects of the traditional detection method are mainly that:
1. the labor intensity is high, and the work efficiency is low;
2. the inner cavity of the flange plate and the clamp plate is sealed, pressurized gas is filled, pressure maintaining is difficult, and detection accuracy is affected.
Disclosure of Invention
The invention aims at: a leakage performance detecting device and a method for detecting the leakage performance of a flange plate assembly by using the leakage performance detecting device are provided, so that the defects existing in the existing detection are overcome.
The technical scheme adopted by the invention is as follows:
a leak detection apparatus for detecting leak performance of a flange assembly, comprising: the device comprises a frame, a pressing device, a detection device and a feeding device, wherein the pressing device, the detection device and the feeding device are arranged on the frame;
the frame is of a door-shaped structure and comprises a bottom plate, a cross beam, a support column I and a support column II, wherein the support column I and the support column II are vertically arranged on the left side and the right side of the bottom plate, and the cross beam is transversely connected to the top ends of the support column I and the support column II;
the pressing device for pressing the flange plate assembly to be tested is hung on the lower portion of the cross beam and comprises a pressing cylinder, a mounting plate I, a mounting plate II, a pressing head I and a pressing head II;
the upper end of the compaction cylinder is fixedly connected to the bottom of the cross beam, the upper end of the cylinder piston is sleeved in a guide hole reserved in the cross beam, the lower end of the cylinder piston is connected with a pressure head I and a pressure head II through a mounting plate I and a mounting plate II, the central axes of the mounted compaction cylinder, the mounting plate I and the mounting plate II are on the same vertical central line, and the pressure head I and the pressure head II are symmetrically mounted on the left side and the right side of the central axis of the mounting plate II;
the pressure head I and the pressure head II are identical in structure, the shape of the pressure head I corresponds to the shape of a flange plate of the flange plate assembly, the top of the pressure head I and the pressure head II upwards concave to form a cylinder structure with a downward opening, the inner cavity of the cylinder is a space for accommodating a transmission and return pipe joint of the flange plate assembly, and a reserved U-shaped groove for extending an oil inlet pipe plug is formed in the rear side of the cylinder:
the compression cylinder is connected with an external control system and provides power for the up-and-down movement of the pressure head I and the pressure head II to compress the flange plate assembly to be tested;
the feeding device for conveying the flange plate assembly to be tested to the detection station is arranged on the plane of the bottom plate and comprises a mounting plate IV, a driving cylinder and a flange plate positioning module, wherein the mounting plate IV is arranged in a sliding fit with the bottom plate, a guide rail I, a guide rail II and a guide rail III which are arranged in parallel are arranged on the plane of the bottom plate, the guide rail II is positioned on the central line of the plane of the bottom plate, the guide rail I and the guide rail III are symmetrically positioned on the left side and the right side of the guide rail II, and a sliding groove I, a sliding groove II and a sliding groove III which are in sliding fit with the guide rail I, the guide rail II and the guide rail III are arranged on the bottom surface of the mounting plate IV;
the driving cylinder is arranged on one side of the bottom plate and connected with the mounting plate IV through the L-shaped mounting plate, and the driving cylinder is connected with an external control system and pushes the mounting plate IV to feed into or withdraw from the detection station under the control of the external control system;
the front surface of the mounting plate IV is provided with a flange positioning module for placing a flange assembly to be tested, the positioning module comprises two positioning cavities with the same structure, the shape of the positioning cavities corresponds to that of the flange assembly, the bottom of the positioning cavities is recessed downwards to form a cylinder structure with an upward opening, the circumference of the opening of the cylinder is provided with an intracavity step for supporting the flange, and the positioning cavities are internally provided with a detection medium input port and a positioning sleeve for inserting a support rod of the flange assembly to be tested;
the bottom end of the medium input port is simultaneously connected with an external detection medium input device and a leakage sensor, and the leakage sensor is connected with an external leakage detector and outputs a leakage detection signal for the external leakage detector;
when the driving cylinder sends the mounting plate IV to the detection station, the centers of the two positioning cavities are respectively positioned on the same vertical central line with the centers of the pressure head I and the pressure head II;
the detection device is arranged at the rear part of the feeding device and comprises a double-shaft cylinder I, a double-shaft cylinder II, an oil pipe plug I and an oil pipe plug II, wherein the double-shaft cylinder I and the double-shaft cylinder II are respectively arranged on a boss I and a boss II of a mounting plate IV;
the rear side of the mounting plate IV is provided with a proximity switch, the proximity switch is mounted on the bottom plate through a mounting plate III, the proximity switch is in circuit connection with an external control system, and when the mounting plate IV reaches a detection station, the rear end of the mounting plate IV contacts with the proximity switch to provide a signal reaching the detection station;
the lower end of the compression cylinder is provided with a compression sensor and the upper end of the compression cylinder is provided with a return sensor, and the compression sensor and the return sensor are respectively connected with an external control system to provide signals for whether the pressure head I and the pressure head II compress and detect the return of the pressure head after the completion;
the front ends of the oil pipe plugs I and II are provided with plugging sensors, and the plugging sensors are connected with an external control system circuit to provide signals whether the oil pipe plugs I and II plug the oil transmission and return pipe joints.
The further technical scheme is as follows:
the front end and the rear end of the guide rail II are respectively provided with a limiting device I and a limiting device II, the limiting device I and the limiting device II are identical in structure and comprise a magnet and an oil buffer which are arranged on a limiting block, when the mounting plate IV reaches a detection station, the front end of the mounting plate IV contacts the limiting device I at the front end of the guide rail II, and when the mounting plate IV exits the station, the rear end of the mounting plate IV contacts the limiting device II at the rear end of the guide rail II.
Further:
and 1-2 push rods used for ejecting the flange plate assembly to be tested out of the positioning cavities are respectively arranged in each positioning cavity, and a driving mechanism of each push rod is connected with an external control system.
The mounting plate I and the mounting plate II are in sliding connection through a sliding groove.
The other technical scheme is as follows:
the method for detecting the leakage performance of the flange plate assembly of the automobile electric fuel pump assembly by using the leakage detection device comprises the following steps:
s1, switching on an external control system:
s11, connecting a compression cylinder, a double-shaft cylinder I, a double-shaft cylinder II and a driving cylinder in the leakage detection device with a gas circuit and a circuit of an external control system;
s12, connecting the proximity switch and the plugging sensor with a circuit of an external control system;
s13, connecting the compaction sensor and the return sensor with an external control system circuit;
s14, connecting a leakage sensor with an external leakage detector circuit;
s15, connecting a driving mechanism of the push rod with an external control system circuit;
s2, arranging a flange plate assembly to be tested:
placing the flange plate assembly to be tested in a positioning cavity of a positioning module, inserting a supporting rod of the flange plate assembly into a positioning sleeve, and sinking the outer circle of the flange plate into a step in the cavity;
s3, conveying the flange plate assembly to be tested into a detection station:
starting a driving cylinder, wherein a cylinder piston pushes the mounting plate IV and drives the positioning module and the flange plate assembly to move forwards to enter the detection station;
s4, compacting the flange plate assembly to be tested
The proximity switch transmits a signal of the feeding device entering the detection station to an external control system, and the external control system starts a compression cylinder on the compression device to push a pressure head I and a pressure head II to move downwards to compress two flange components to be detected;
s5, detection
S51, transmitting a signal of the pressed flange plate assembly to be tested to an external control system by the pressing sensor, and starting a double-shaft cylinder I and a double-shaft cylinder II by the external control system, wherein a cylinder piston I and a cylinder piston II move forwards to push an oil pipe plug I and an oil pipe plug II to simultaneously plug oil conveying and returning pipe joints of the two flange plate assemblies to be tested;
s52, transmitting a signal of in-place plugging to an external control system by the plugging sensor, and controlling the external control system to convey a detection medium with pressure into the positioning cavity through a detection medium input port and keeping constant pressure for detection;
s53, the leakage sensor transmits a detection signal to an external leakage detector, and the detector outputs a detection result;
s6, detection completion
S61, after the detector outputs a detection result, an external control system controls the double-shaft air cylinder I and the double-shaft air cylinder II to return the detection device to an initial state, and controls the compression air cylinder to return the compression device to the initial state;
s62, a return sensor transmits signals of returning the pressure heads I and II to an external control system, and the external control system controls a driving cylinder to return the feeding device to an initial state;
s63, the external control system controls and controls the push rod in the positioning cavity to push out the flange assembly to be tested, and an operator takes out the detected flange assembly and continues to detect the next workpiece.
By adopting the technical scheme, the leakage performance detection device and the method for detecting the leakage performance of the flange plate assembly by using the leakage performance detection device have the following beneficial effects:
1. the power device of the leakage performance detection device adopts the pneumatic pushing mechanism as power, and each power cylinder is connected with an external gas circuit control system, so that the detection automation is easy to realize, the detection method is simple and convenient, and two products can be detected by only one worker in the whole detection process, so that the production efficiency is improved, and the labor intensity of workers is greatly reduced;
2. a proximity switch is arranged at the rear side of a feeding device (a mounting plate IV) of the leakage performance detection device, so that whether a detected flange plate assembly is conveyed to the center of a pressing device or not can be monitored, and the safety of the detection process is ensured;
the lower end of the compaction cylinder is provided with a compaction sensor, the upper end of the compaction cylinder is provided with a return sensor, the front ends of the oil pipe plug I and the oil pipe plug II are provided with plugging sensors, whether the flange plate assembly to be tested is compacted or not can be monitored, whether the oil delivery mouth and the oil return mouth of the flange plate assembly are plugged or not is monitored, and whether the compaction cylinder returns or not is monitored, so that the detection precision is ensured;
3. the front end and the rear end of the guide rail II of the detection device are respectively provided with a limiting device I and a limiting device II, which not only have the limiting effect on the reciprocating movement of the feeding device, but also have the buffering effect on the impact generated by the reciprocating movement of the feeding device, thereby prolonging the service life of the device;
4. according to the detection device, a pressure head I and a pressure head II are connected with a cylinder piston through a mounting plate I and a mounting plate II, the mounting plate I and the mounting plate II are in sliding connection through a sliding chute, and the center position of the pressure head can be accurately adjusted by adjusting the relative positions of the mounting plate I and the mounting plate II;
5. and 1-2 push rods used for ejecting the flange plate assembly to be tested out of the positioning cavity are respectively arranged in each positioning cavity, so that the workpiece can be conveniently taken out.
Description of the drawings:
FIG. 1 is a schematic diagram of a flange assembly;
fig. 2 to 3 are schematic structural views of a detecting device for flange components of an electric fuel pump according to the present invention:
fig. 2 is a rear perspective view, and fig. 3 is a use state perspective view;
FIG. 4 is a schematic diagram of a frame structure;
FIG. 5 is a schematic view of a compressing apparatus;
FIG. 6 is a schematic diagram of a feeding device;
FIG. 7 is a schematic diagram of a detection device;
in the figure:
the device comprises an A-flange plate assembly, an A0-oil conveying and returning pipe joint, an A1-supporting rod and an A2-flange plate;
1-a frame, 11-a bottom plate, 12-a cross beam, 13-a support column I and 14-a support column II;
the device comprises a 2-pressing device, a 21-pressing cylinder, a 211-cylinder piston, a 22-mounting plate I, a 23-mounting plate II, a 24-pressing head I, a 25-pressing head II, a 26-pressing sensor and a 27-return sensor;
3-detecting device, 31-proximity switch, 32-mounting plate III, 33-double-shaft cylinder I, 331-piston I, 34-double-shaft cylinder II, 341-piston II, 35-oil pipe plug I, 36-oil pipe plug II;
4-feeding device, 41-mounting plate IV, 411-boss I, 412-boss II, 42-positioning module, 421-detection medium input port, 422-positioning cavity, 423-push rod, 424-positioning sleeve, 425-cavity step, 43-guide rail, 431-guide rail I, 432-guide rail II, 433-guide rail III, 44-limiting device I, 441-magnet, 442-oil buffer, 443-limiting block, 45-L-shaped mounting plate, 46-driving cylinder, 461-piston, 471-slide groove I, 472-slide groove II, 473-slide groove III, 48-limiting device II.
Detailed Description
Example 1
A leak detection apparatus for detecting leak performance of a flange assembly, comprising: the device comprises a frame 1, a pressing device 2, a detection device 3 and a feeding device 4, wherein the pressing device 2, the detection device 3 and the feeding device 4 are arranged on the frame;
the frame 1 is of a door-shaped structure and comprises a bottom plate 11, a cross beam 12, a support column I13 and a support column II 14, wherein the support column I and the support column II are vertically arranged on the left side and the right side of the bottom plate, and the cross beam is transversely connected to the top ends of the support column I and the support column II;
the pressing device 2 for pressing the flange plate assembly to be tested is hung on the lower part of the cross beam 12 and comprises a pressing cylinder 21, a mounting plate I22, a mounting plate II 23, a pressing head I24 and a pressing head II 25;
the upper end of the compression cylinder is fixedly connected to the bottom of the cross beam 12, the upper end of the cylinder piston is sleeved in a guide hole reserved in the cross beam, the lower end of the cylinder piston is connected with a pressure head I24 and a pressure head II 25 through a mounting plate I22 and a mounting plate II 23, the central axes of the three parts of the compression cylinder, the mounting plate I and the mounting plate II after the installation are arranged on the same vertical central line, and the pressure head I24 and the pressure head II 25 are symmetrically arranged on the left side and the right side of the central axis of the mounting plate II;
the structure of the pressure head I24 is the same as that of the pressure head II 25, the shape of the pressure head I is corresponding to that of a flange plate of the flange plate assembly, the top of the pressure head I is upwards recessed to form a cylinder structure with a downward opening, the inner cavity of the cylinder is a space for accommodating an oil conveying pipe joint and an oil returning pipe joint of the flange plate assembly, and a reserved U-shaped groove for extending an oil inlet pipe plug is formed in the rear side of the cylinder:
the compression cylinder is connected with an external control system and provides power for the up-and-down movement of the pressure head I24 and the pressure head II 25 to compress the flange plate assembly to be tested;
the feeding device 4 for conveying the flange assembly to be tested to the detection station is arranged on the plane of the bottom plate 11 and comprises a mounting plate IV 41, a driving cylinder 46 and a flange positioning module 42, wherein the mounting plate IV 41 is arranged in a sliding fit with the bottom plate 11, a guide rail I431, a guide rail II 432 and a guide rail III 431 which are arranged in parallel are arranged on the plane of the bottom plate 11, the guide rail II 432 is positioned on the central line of the plane of the bottom plate 11, the guide rail I431 and the guide rail III 433 are symmetrically positioned on the left side and the right side of the guide rail II 432, and a sliding groove I471, a sliding groove II 472 and a sliding groove III 473 which are in sliding fit with the guide rail I, the guide rail II and the guide rail III are arranged on the bottom surface of the mounting plate IV 41;
the driving cylinder 46 is arranged on one side of the bottom plate 11 and is connected with the mounting plate IV 41 through an L-shaped mounting plate 45, and the driving cylinder is connected with an external control system and pushes the mounting plate IV 41 to be sent into or withdrawn from the detection station under the control of the external control system;
the flange positioning module 42 for placing the flange assembly to be tested is arranged on the front surface of the mounting plate IV 41, the positioning module 42 comprises two positioning cavities 422 with the same structure, the shape of the positioning cavities corresponds to that of the flange assembly, the bottoms of the positioning cavities are recessed downwards to form a cylinder structure with an upward opening, the circumference of the opening of the cylinder is provided with a cavity step 425 for supporting the flange A2, and the positioning cavities are internally provided with a detection medium input port 421 and a positioning sleeve 424 for inserting the support rod of the flange assembly to be tested;
the bottom end of the medium input port is simultaneously connected with an external detection medium input device and a leakage sensor, the external detection medium input device is connected to form a detection medium input channel, and the leakage sensor is connected with an external leakage detector and outputs a leakage detection signal for the external leakage detector;
when the driving cylinder 46 sends the mounting plate IV 41 to the detection station, the centers of the two positioning cavities 422 are respectively positioned on the same vertical central line with the centers of the pressure head I24 and the pressure head II 25;
the detection device 3 is arranged at the rear part of the feeding device and comprises a double-shaft cylinder I33, a double-shaft cylinder II 34, an oil pipe plug I35 and an oil pipe plug II 36, wherein the double-shaft cylinder I33 and the double-shaft cylinder II 34 are respectively arranged on a boss I411 and a boss II 412 of the mounting plate IV 41, the oil pipe plug I35 and the oil pipe plug II 36 are respectively arranged at the front ends of the double-shaft cylinder I33 and the double-shaft cylinder II 34 and are respectively connected with pistons of the double-shaft cylinder I33 and the double-shaft cylinder II 34, and the double-shaft cylinder I33 and the double-shaft cylinder II 34 are respectively connected with an external control system and push the oil pipe plug I35 and the oil pipe plug II 3) to advance or retreat under the control of the external control system;
the rear side of the mounting plate IV 41 is provided with a proximity switch 31, the proximity switch is mounted on the bottom plate through a mounting plate III 32, the proximity switch 31 is in circuit connection with an external control system, and the rear end of the mounting plate IV contacts with the proximity switch when reaching a detection station to provide a signal reaching the detection station;
the lower end of the compaction cylinder is provided with a compaction sensor 26 and the upper end of the compaction cylinder is provided with a return sensor 27, and the compaction sensor and the return sensor are respectively connected with an external control system to provide signals for whether the pressure head I24 and the pressure head II 25 are compacted and detecting the return of the pressure head after completion;
the front ends of the oil pipe plugs I and II are provided with plugging sensors, and the plugging sensors are connected with an external control system circuit to provide signals whether the oil pipe plugs I and II plug the oil transmission and return pipe joints.
The front end and the rear end of the guide rail II 432 are respectively provided with a limiting device I44 and a limiting device II 48, the limiting device I44 and the limiting device II 48 have the same structure and comprise a magnet 441 and an oil buffer 442 which are arranged on a limiting block 443, when the mounting plate IV 41 reaches a detection station, the front end of the mounting plate IV contacts with the limiting device I44 at the front end of the guide rail II 432, and when the mounting plate IV exits from the station, the rear end of the mounting plate IV contacts with the limiting device II 48 at the rear end of the guide rail II 432.
Each positioning cavity 422 is internally provided with 1-2 push rods 423 for ejecting the flange assembly to be tested out of the positioning cavity, and the driving mechanism of the push rods is connected with an external control system.
The mounting plate I22 is in sliding connection with the mounting plate II 23 through a sliding groove.
Example two
A method for detecting leakage performance of a flange assembly by using a leakage detecting apparatus according to claim 4, comprising the steps of:
s1, switching on an external control system:
s11, connecting a compression cylinder, a double-shaft cylinder I, a double-shaft cylinder II and a driving cylinder in the leakage detection device with a gas circuit and a circuit of an external control system;
s12, connecting the proximity switch and the plugging sensor with a circuit of an external control system;
s13, connecting the compaction sensor and the return sensor with an external control system circuit;
s14, connecting a leakage sensor with an external leakage detector circuit;
s15, connecting a driving mechanism of the push rod with an external control system circuit;
s2, arranging a flange plate assembly to be tested:
placing the flange assembly A to be tested in the positioning cavity 422 of the positioning module 42, inserting the support rod A1 of the flange assembly into the positioning sleeve 424, and sinking the outer circle of the flange A2 into the step 425 in the cavity;
s3, conveying the flange plate assembly to be tested into a detection station:
starting a driving cylinder 46, and driving a positioning module 42 and a flange plate assembly to move forwards to enter a detection station by a cylinder piston 461 to push a mounting plate IV 41;
s4, compacting the flange plate assembly to be tested
The proximity switch 31 transmits a signal of the feeding device 4 entering the detection station to an external control system, and the external control system starts a compressing cylinder 21 on the compressing device to push a pressure head I24 and a pressure head II 25 to move downwards to compress two flange plate assemblies A to be detected;
s5, detection
S51, a signal of the compression sensor for compressing the flange plate assembly A to be tested is transmitted to an external control system, the external control system starts a double-shaft cylinder I33 and a double-shaft cylinder II 34, a cylinder piston I331 and a cylinder piston II 341 move forwards to push an oil pipe plug I35 and an oil pipe plug II 36 to simultaneously plug an oil conveying pipe joint A0 of the two flange plate assemblies A to be tested;
s52, transmitting a signal of blocking in-place to an external control system by the blocking sensor, and controlling the external control system to convey a detection medium with pressure into the positioning cavity 422 through the detection medium input port 421 and keeping constant pressure for detection;
s53, the leakage sensor transmits a detection signal to an external leakage detector, and the detector outputs a detection result;
s6, detection completion
S61, after the detection result is output by the detector, the external control system controls the double-shaft air cylinder I33 and the double-shaft air cylinder II 34 to return the oil pipe plug I35 and the oil pipe plug II 36 of the detection device 3 to the initial state, controls the compression air cylinder 21 to return the pressure head I24 and the pressure head II 25 of the compression device 2 to the initial state,
s62, a return sensor transmits signals of returning the pressure head I24 and the pressure head II 25 to an external control system, and the external control system controls
The driving cylinder 46 is controlled to return the mounting plate IV 41 and the positioning module 42 of the feeding device 4 and the flange plate assembly to be tested to an initial state;
s63, the external control system controls the push rod 423 in the positioning cavity to push out the flange assembly to be detected, and an operator takes out the detected flange assembly and continues the detection of the next workpiece.
Note that:
the outer circle product of the flange is provided with a sealing ring, the positioning cavity 422 is sealed when the pressure head compresses the flange assembly, and the detection gas is input into the positioning cavity from the mass input port;
the oil pipe plug is provided with a sealing ring during design, and the oil conveying and returning pipe joint can be sealed during sealing.
Claims (5)
1. A leak detection apparatus, characterized in that: the device is a leak detection device for detecting the leak performance of a flange plate assembly, comprising: the device comprises a frame (1), a pressing device (2), a detection device (3) and a feeding device (4), wherein the pressing device (2), the detection device (3) and the feeding device (4) are arranged on the frame;
the frame (1) is of a door-shaped structure and comprises a bottom plate (11), a cross beam (12), a support column I (13) and a support column II (14), wherein the support column I and the support column II are vertically arranged on the left side and the right side of the bottom plate, and the cross beam is transversely connected to the top ends of the support column I and the support column II;
the pressing device (2) for pressing the flange plate assembly to be tested is hung at the lower part of the cross beam (12) and comprises a pressing cylinder (21), a mounting plate I (22), a mounting plate II (23), a pressing head I (24) and a pressing head II (25);
the upper end of the compression cylinder is fixedly connected to the bottom of the cross beam (12), the upper end of the cylinder piston is sleeved in a guide hole reserved in the cross beam, the lower end of the cylinder piston is connected with a pressure head I (24) and a pressure head II (25) through a mounting plate I (22) and a mounting plate II (23), the central axes of the three components of the compression cylinder, the mounting plate I and the mounting plate II after being mounted are on the same vertical central line, and the pressure head I (24) and the pressure head II (25) are symmetrically mounted on the left side and the right side of the central axis of the mounting plate II;
the structure of the pressure head I (24) is the same as that of the pressure head II (25), the shape of the pressure head I is corresponding to that of a flange plate of the flange plate assembly, the top of the pressure head I is upwards recessed to form a cylinder structure with a downward opening, the inner cavity of the cylinder is a space for accommodating a joint of an oil conveying pipe and an oil return pipe of the flange plate assembly, and a reserved U-shaped groove for extending into the oil pipe plug is arranged at the rear side of the cylinder:
the compression cylinder is connected with an external control system and provides power for the up-and-down movement of the pressure head I (24) and the pressure head II (25) and for compressing the flange plate assembly to be tested;
the feeding device (4) for conveying the flange assembly to be tested to the detection station is arranged on the plane of the bottom plate (11) and comprises a mounting plate IV (41), a driving cylinder (46) and a flange positioning module (42), wherein the mounting plate IV (41) is arranged in a sliding fit with the bottom plate (11), a guide rail I (431), a guide rail II (432) and a guide rail III (431) which are arranged in parallel are arranged on the plane of the bottom plate (11), the guide rail II (432) is positioned on the central line of the plane of the bottom plate (11), the guide rail I (431) and the guide rail III (433) are symmetrically positioned on the left side and the right side of the guide rail II (432), and a chute I (471), a chute II (472) and a chute III (473) which are in sliding fit with the guide rail I, the guide rail II and the guide rail III are arranged on the bottom surface of the mounting plate IV (41);
the driving cylinder (46) is arranged on one side of the bottom plate (11) and is connected with the mounting plate IV (41) through an L-shaped mounting plate (45), and the driving cylinder is connected with an external control system and pushes the mounting plate IV (41) to be sent into or withdrawn from the detection station under the control of the external control system;
the front surface of the mounting plate IV (41) is provided with a flange positioning module (42) for placing a flange assembly to be tested, the positioning module (42) comprises two positioning cavities (422) with the same structure, the shape of the positioning cavities corresponds to that of the flange assembly, the bottom of the positioning cavities is recessed downwards to form a cylinder structure with an upward opening, the circumference of the opening of the cylinder is provided with a cavity step (425) for supporting the flange (A2), and the positioning cavities are internally provided with a detection medium input port (421) and a positioning sleeve (424) for inserting a support rod of the flange assembly to be tested;
the bottom end of the medium input port is simultaneously connected with an external detection medium input device and a leakage sensor, and the leakage sensor is connected with an external leakage detector and outputs a leakage detection signal for the external leakage detector;
when the driving cylinder (46) sends the mounting plate IV (41) to the detection station, the centers of the two positioning cavities (422) are respectively positioned on the same vertical central line with the centers of the pressure head I (24) and the pressure head II (25);
the detection device (3) is arranged at the rear part of the feeding device and comprises a double-shaft cylinder I (33), a double-shaft cylinder II (34), an oil pipe plug I (35) and an oil pipe plug II (36), wherein the double-shaft cylinder I (33) and the double-shaft cylinder II (34) are respectively arranged on a boss I (411) and a boss II (412) of the mounting plate IV (41), the oil pipe plug I (35) and the oil pipe plug II (36) are arranged at the front ends of the double-shaft cylinder I (33) and the double-shaft cylinder II (34) and are respectively connected with the piston of the double-shaft cylinder I (33) and the piston of the double-shaft cylinder II (34), and the double-shaft cylinder I (33) and the double-shaft cylinder II (34) are respectively connected with an external control system and push the oil pipe plug I (35) and the oil pipe plug II (36) to move forwards or backwards under the control of the external control system;
the rear side of the mounting plate IV (41) is provided with a proximity switch (31), the proximity switch is mounted on the bottom plate through a mounting plate III (32), the proximity switch (31) is in circuit connection with an external control system, and the rear end of the mounting plate IV contacts with the proximity switch when reaching a detection station to provide a signal reaching the detection station;
the lower end of the compaction cylinder is provided with a compaction sensor (26), the upper end of the compaction cylinder is provided with a return sensor (27), the compaction sensor (26) and the return sensor (27) are respectively connected with an external control system to provide signals for whether the pressure head I (24) and the pressure head II (25) are compacted and detecting the return of the pressure head after completion;
the front ends of the oil pipe plugs I and II are provided with plugging sensors, and the plugging sensors are connected with an external control system circuit to provide signals whether the oil pipe plugs I and II plug the oil transmission and return pipe joints.
2. A leak detection apparatus as defined in claim 1, wherein: the front end and the rear end of the guide rail II (432) are respectively provided with a limiting device I (44) and a limiting device II (48), the limiting device I (44) and the limiting device II (48) are identical in structure and comprise a magnet (441) and an oil buffer (442) which are arranged on a limiting block (443), when the front end of the mounting plate IV (41) reaches a detection station, the mounting plate IV contacts the limiting device I (44) at the front end of the guide rail II (432), and when the mounting plate IV exits the station, the rear end of the mounting plate IV contacts the limiting device II (48) at the rear end of the guide rail II (432).
3. A leak detection apparatus as defined in claim 2, wherein: and 1-2 push rods (423) used for ejecting the flange plate assembly to be tested out of the positioning cavities are respectively arranged in each positioning cavity (422), and a driving mechanism of each push rod is connected with an external control system.
4. A leak detection apparatus as defined in claim 3, wherein: the mounting plate I (22) is in sliding connection with the mounting plate II (23) through a sliding groove.
5. A method for detecting leakage performance of a flange plate assembly is characterized by comprising the following steps: the method for detecting the leakage performance of the flange plate component of the electric fuel pump assembly of the automobile by using the leakage detection device as claimed in claim 4 comprises the following steps:
s1, switching on an external control system:
s11, connecting a compression cylinder, a double-shaft cylinder I, a double-shaft cylinder II and a driving cylinder in the leakage detection device with a gas circuit and a circuit of an external control system;
s12, connecting the proximity switch and the plugging sensor with a circuit of an external control system;
s13, connecting the compaction sensor and the return sensor with an external control system circuit;
s14, connecting a leakage sensor with an external leakage detector circuit;
s15, connecting a driving mechanism of the push rod with an external control system circuit;
s2, arranging a flange plate assembly to be tested:
placing a flange plate assembly (A) to be tested in a positioning cavity (422) of a positioning module (42), inserting a supporting rod (A1) of the flange plate assembly into a positioning sleeve (424), and sinking the outer circle of a flange plate (A2) into a step (425) in a cavity;
s3, conveying the flange plate assembly to be tested into a detection station:
starting a driving air cylinder (46), and driving a mounting plate IV (41) and a positioning module (42) and a flange plate assembly to move forwards by an air cylinder piston (461) to enter a detection station;
s4, compacting the flange plate assembly to be tested
The proximity switch (31) transmits a signal of the feeding device (4) entering the detection station to an external control system, and the external control system starts a compressing cylinder (21) on the compressing device to push a pressure head I (24) and a pressure head II (25) to move downwards to compress two flange plate assemblies (A) to be detected;
s5, detection
S51, transmitting a signal of the pressed flange plate assembly (A) to an external control system by the pressing sensor, and starting a double-shaft cylinder I (33) and a double-shaft cylinder II (34) by the external control system, wherein a cylinder piston I (331) and a cylinder piston II (341) move forwards to push an oil pipe plug I (35) and an oil pipe plug II (36) to simultaneously plug an oil conveying pipe joint (A0) of the two flange plate assemblies (A);
s52, transmitting a signal of blocking in-place to an external control system by the blocking sensor, and controlling the external control system to convey a detection medium with pressure into a positioning cavity (422) through a detection medium input port (421) and keeping constant pressure for detection;
s53, the leakage sensor transmits a detection signal to an external leakage detector, and the detector outputs a detection result;
s6, detection completion
S61, after the detector outputs a detection result, an external control system controls a double-shaft air cylinder I (33) and a double-shaft air cylinder II (34) to return the detection device (3) to an initial state, and controls a compression air cylinder (21) to return the compression device (2) to the initial state;
s62, a return sensor transmits signals of returning the pressure head I (24) and the pressure head II (25) to an external control system, and the external control system controls a driving cylinder (46) to return the feeding device (4) to an initial state;
s63, an external control system controls and controls a push rod (423) in the positioning cavity to push out the flange assembly to be tested, and an operator takes out the detected flange assembly and continues the detection of the next workpiece.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811434324.0A CN109374232B (en) | 2018-11-28 | 2018-11-28 | Leakage detection device and method for detecting leakage performance of flange plate assembly by using same |
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| CN201811434324.0A CN109374232B (en) | 2018-11-28 | 2018-11-28 | Leakage detection device and method for detecting leakage performance of flange plate assembly by using same |
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| CN109374232B true CN109374232B (en) | 2023-09-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900440B (en) * | 2019-03-26 | 2023-12-05 | 广西淞森车用部件有限公司 | Device and method for detecting leakage of flange plate and rollover valve assembly |
| CN110132506A (en) * | 2019-06-12 | 2019-08-16 | 南京英尼格玛工业自动化技术有限公司 | A kind of versatility is good and the adjustable cabinet air-tightness detection device of pressure point |
| CN110370524A (en) * | 2019-08-26 | 2019-10-25 | 江苏良腾机械有限公司 | A kind of fully automatic loop assembly line producing claying board |
| CN110595696A (en) * | 2019-10-29 | 2019-12-20 | 格力电器（武汉）有限公司 | Water pipe air tightness detection device |
| CN113772399B (en) * | 2021-09-02 | 2023-06-06 | 江苏集萃精凯高端装备技术有限公司 | Compact and efficient material supply device and supply method thereof |
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