CN115753087A - Technology for detecting sealing performance of coupler with metal corrugated pipe - Google Patents
Technology for detecting sealing performance of coupler with metal corrugated pipe Download PDFInfo
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- CN115753087A CN115753087A CN202211553045.2A CN202211553045A CN115753087A CN 115753087 A CN115753087 A CN 115753087A CN 202211553045 A CN202211553045 A CN 202211553045A CN 115753087 A CN115753087 A CN 115753087A
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Abstract
A technology for detecting the sealing performance of a coupler with a metal corrugated pipe is used for carrying out dynamic sealing performance detection on the coupler by simulating the actual working condition of the coupler for track traffic with the metal corrugated pipe. The method comprises the following steps: (1-1) installing a coupling for rail transit between a driving main shaft and an input shaft of a gear box; (1-2) injecting sufficient lubricating oil into the coupler; (2-1) driving the driving main shaft to rotate and driving the input shaft of the gear box to rotate through the coupler; (2-2) applying a radial load Fr to the input shaft of the gearbox; (2-3) changing the direction and magnitude of the radial load Fr applied to the input shaft of the gearbox; (2-4) applying an axial load Fa to the input shaft of the gearbox; (2-5) changing the direction and the magnitude of the axial load Fa applied to the input shaft of the gearbox; and (3-1) braking the driving main shaft, and observing whether leakage occurs. The invention dynamically detects the sealing performance by simulating the working condition of the coupler, and has real detection and high precision.
Description
Technical Field
The invention relates to the technical field of shaft coupling tightness detection, in particular to a shaft coupling tightness detection process with a metal corrugated pipe.
Background
The coupling is also called coupling, and is used for firmly connecting a driving shaft and a driven shaft in different mechanisms to rotate together and transmitting mechanical components of movement and torque. The junction of external tooth and corrugated metal pipe sets up O type sealing washer in the shaft coupling, and the operating mode of shaft coupling working process is comparatively complicated for the track traffic, because the track is in the irregularity of direction of height assembly, changeable of track shape, the shaft coupling changes frequently in axial and radial displacement in the working process. Gaps can be generated at the joint of the inner and outer teeth of the coupler and the metal corrugated pipe, and then the sealing ring is deformed, so that lubricating oil is leaked. When the tightness of the coupler is detected, the adopted detection mode is a gas negative pressure detection mode. However, the gas negative pressure detection method has the following problems: the tightness defect can not be detected in the negative pressure detection process, and the leakage of lubricating oil can occur after the coupler is loaded. The reasons why the above problems occur are: when the sealing performance of the coupler is detected in a gas negative pressure detection mode, the coupler is in a non-working state (namely a static state), and the detection is static; the practical working condition of the coupler is high-speed dynamic swing, and the O-shaped sealing ring is in an extrusion deformation state at all times under the action of liquid oil and high-speed rotating centrifugal force, so that the sealing defect of the coupler in a static detection mode is not exposed, the sealing detection is not real, and the real condition of the coupler cannot be reflected.
Disclosure of Invention
The invention aims to provide a technology for detecting the sealing performance of a coupler with a metal corrugated pipe.
The technical scheme adopted by the invention for solving the technical problems is as follows: a technology for detecting the sealing performance of a coupling with a metal corrugated pipe comprises the following steps:
1. coupling assembly
1-1, installing a coupling for rail transit between a driving main shaft and an input shaft of a gear box.
And 1-2, injecting sufficient lubricating oil into the coupler, and sealing the oil injection hole after oil injection is completed.
2. Coupling rotary drive
2-1, driving the driving main shaft to rotate and driving the input shaft of the gear box to rotate through the coupler; during this process, the rotational speed of the drive spindle is adjusted, which lasts for 2-4 minutes.
And 2-2, applying a radial load Fr to the input shaft of the gearbox, and changing the magnitude of the radial load Fr to adjust the radial displacement of the input shaft of the gearbox, wherein the step lasts for 1-2 minutes.
2-3, changing the direction and magnitude of the radial load Fr applied to the input shaft of the gearbox, which lasts for 1-2 minutes.
And 2-4, applying an axial load Fa to the input shaft of the gearbox, changing the magnitude of the axial load Fa, and adjusting the axial displacement of the input shaft of the gearbox, wherein the step lasts for 1-2 minutes.
2-5, changing the direction and magnitude of the axial load Fa applied to the input shaft of the gearbox, which lasts for 1-2 minutes.
3. Observation of leaks
And 3-1, braking the driving spindle, and observing whether leakage occurs at the joint of the metal corrugated pipe of the coupler and the inner and outer teeth of the coupler after the driving spindle stops rotating.
3-2, if the lubricating oil leaks from the coupler, disassembling the coupler for further maintenance; and if the lubricating oil leakage does not occur in the coupler, emptying the lubricating oil in the coupler, and then disassembling the coupler and marking as a qualified product.
Further, in step 2-3, at least four radial loads are applied to the input shaft of the gearbox in different directions, and at least two radial loads Fr are applied to the input shaft of the gearbox in the same direction and have different magnitudes.
Further, the following operations are performed after steps 2-5:
2-6, simultaneously applying a radial load Fr and an axial load Fa to the input shaft of the gear box to enable the input shaft of the gear box to generate radial displacement and axial displacement relative to the driving main shaft; changing the radial load Fr and the axial load Fa, and adjusting the radial displacement and the axial displacement of the input shaft of the gear box; this step lasts 1-2 minutes.
Further, the following operations are performed after steps 2-6:
2-7, changing the direction and the magnitude of a radial load Fr applied to the input shaft of the gearbox and the direction and the magnitude of an axial load Fa applied to the input shaft of the gearbox, wherein the number of radial loads Fr applied to the input shaft of the gearbox in different directions is at least four, and the number of radial loads Fr applied to the input shaft of the gearbox in the same direction is at least two; changing the direction and the magnitude of the axial load Fa exerted on the input shaft of the gearbox when the direction and the magnitude of the radial load Fr exerted on the input shaft of the gearbox are changed; this step lasts 2-4 minutes.
Further, the following operations are performed after step 3-2:
4. reverse assembly
4-1, turning the coupler around, then fixedly connecting the outer teeth at one end of the coupler for rail transit with the input shaft of the gear box, and fixedly connecting the outer teeth at the other end of the coupler for rail transit with the driving main shaft.
And 4-2, injecting enough lubricating oil into the coupler again, and sealing the oil injection hole after oil injection is completed.
5. Reverse rotation drive
5-1, driving the driving main shaft to rotate, and further driving the input shaft of the gear box to rotate through the coupler; in the process, the rotating speed of the input shaft of the gear box is adjusted by adjusting the rotating speed of the driving main shaft; this step lasts 2-4 minutes.
5-2, applying a radial load Fr to the input shaft of the gear box, changing the size of the radial load Fr, and adjusting the radial displacement of the input shaft of the gear box; this step lasts 1-2 minutes.
5-3, changing the direction and magnitude of the radial load Fr applied to the input shaft of the gearbox, which step lasts for 1-2 minutes.
5-4, applying an axial load Fa to the input shaft of the gear box, and changing the magnitude of the axial load Fa to adjust the axial displacement of the input shaft of the gear box; this step lasts 1-2 minutes.
5-5, changing the direction and magnitude of the axial load Fa applied to the input shaft of the gearbox, which lasts for 1-2 minutes.
6. Reexamination of leakage
6-1, braking the driving spindle, and observing whether leakage occurs at the joint of the metal corrugated pipe of the coupler and the inner and outer teeth of the coupler after the driving spindle stops rotating.
6-2, if lubricating oil leakage occurs to the coupler, disassembling the coupler for further maintenance; if the lubricating oil leakage does not occur in the coupler, the lubricating oil in the coupler is emptied, and then the coupler is disassembled and marked as a qualified product.
Further, in step 5-3, at least four radial loads are applied to the input shaft of the gearbox in different directions, and at least two radial loads Fr are applied to the input shaft of the gearbox in the same direction and have different magnitudes.
Further, after step 5-5, the following operations are performed:
5-6, simultaneously applying a radial load Fr and an axial load Fa to the input shaft of the gear box, so that the input shaft of the gear box generates radial displacement and axial displacement relative to the driving main shaft 1; changing the radial load Fr and the axial load Fa, and adjusting the input shaft radial displacement and the input shaft axial displacement of the gear box; this step lasts 1-2 minutes.
Further, after steps 5-6, the following operations are performed:
5-7, changing the direction and the magnitude of a radial load Fr applied to the input shaft of the gearbox and the direction and the magnitude of an axial load Fa applied to the input shaft of the gearbox, wherein the number of the radial loads Fr applied to the input shaft of the gearbox in different directions is at least four, and the number of the radial loads Fr applied to the input shaft of the gearbox in the same direction in different magnitudes is at least two; changing the direction and the magnitude of the axial load Fa exerted on the input shaft of the gearbox when the direction and the magnitude of the radial load Fr exerted on the input shaft of the gearbox are changed; this step lasts 2-4 minutes.
The beneficial effects of the invention are: the invention can avoid the detection blind area existing in the gas negative pressure static detection mode by simulating the actual working condition of the coupler and then observing the leakage of the lubricating oil. The coupler works under the simulated actual working condition, so that the problems of the coupler can be fully exposed, the real and accurate reaction and the leakage fault of lubricating oil can be found, and the dynamic detection is realized.
Drawings
FIG. 1 is a schematic view of a drive spindle coaxial with a gearbox input shaft;
FIG. 2 is one of the schematic views showing the radial displacement of the input shaft of the gearbox relative to the drive spindle;
FIG. 3 is a schematic view showing the axial displacement of the input shaft of the gear box relative to the driving spindle
FIG. 4 is a schematic view of the axial and radial displacement of the input shaft of the gearbox relative to the drive spindle;
FIG. 5 is a second schematic view showing the radial displacement of the input shaft of the gearbox relative to the drive spindle;
FIG. 6 is a schematic illustration of the application of radial loads to the input shaft of the gearbox;
FIG. 7 is a schematic view of the application of axial load to the input shaft of the gearbox;
FIG. 8 is a schematic representation of the application of axial and radial loads to the gearbox input shaft;
in the figure: 1 driving the main shaft and 2 driving the input shaft of the gear box.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a driving main shaft 1 is an output shaft of a traction motor of a bullet train, a gearbox input shaft 2 is an input end of a transmission gearbox, and a rail transit coupling is installed between the driving main shaft 1 and the gearbox input shaft 2. Under normal operating conditions, the driving main shaft 1 is coaxial with the input shaft 2 of the gear box. When the driving route of the motor train is changed or the track is not smooth, the axial and/or radial displacement between the input shaft 2 of the gear box and the driving main shaft 1 can occur. As shown in fig. 2 and 5, the gearbox input shaft 2 is radially displaced relative to the drive spindle 1. As shown in fig. 3, the gearbox input shaft 2 is axially displaced relative to the drive spindle 1. As shown in fig. 4, the gearbox input shaft 2 is displaced axially and radially relative to the drive spindle 1.
In order to simulate the actual working condition of the coupler and carry out the tightness detection on the coupler under the actual working condition, the invention adopts the following process steps to carry out the dynamic tightness detection on the coupler.
1. Coupling assembly
1. The coupling for rail transit is arranged between a driving main shaft 1 and a gearbox input shaft 2, wherein the driving main shaft 1 is regarded as an output shaft of a motor car traction motor, and the gearbox input shaft 2 is regarded as an input end of a transmission gearbox. During installation, the outer teeth at one end of the track traffic coupler are fixedly connected with the driving spindle 1, and the outer teeth at the other end of the track traffic coupler are fixedly connected with the gear box input shaft 2.
2. And sufficient lubricating oil is injected into the coupler, and the oil injection hole is closed after the oil injection is finished.
2. Coupling rotary drive
1. Driving the driving main shaft 1 to rotate, and further driving the gear box input shaft 2 to rotate through the coupler; in the process, the rotating speed of the input shaft 2 of the gear box is adjusted by adjusting the rotating speed of the driving main shaft 1; this step lasts 2-4 minutes.
2. As shown in fig. 6, a radial load Fr is applied to the gearbox input shaft 2, causing a radial displacement of the gearbox input shaft 2 relative to the drive spindle 1; changing the radial load Fr and adjusting the radial displacement of the input shaft 2 of the gear box; this step lasts for 1-2 minutes;
3. changing the direction and the magnitude of the radial load Fr applied to the gearbox input shaft 2, wherein the number of the radial loads Fr applied to the gearbox input shaft 2 in different directions is at least four, and the number of the radial loads Fr applied to the gearbox input shaft 2 in the same direction is at least two; this step lasts 1-2 minutes.
4. As shown in fig. 7, an axial load Fa is applied to the gearbox input shaft 2, causing an axial displacement of the gearbox input shaft 2 relative to the drive spindle 1; changing the magnitude of the axial load Fa to adjust the axial displacement of the input shaft 2 of the gearbox; this step lasts for 1-2 minutes;
5. changing the direction and magnitude of the axial load Fa applied to the gearbox input shaft 2, namely applying the opposite axial load Fa to the gearbox input shaft 2 and changing the magnitude of the axial load Fa applied to the gearbox input shaft 2; this step lasts 1-2 minutes.
6. As shown in fig. 8, the radial load Fr and the axial load Fa are simultaneously applied to the gearbox input shaft 2, so that the gearbox input shaft 2 generates radial displacement and axial displacement relative to the drive spindle 1; changing the radial load Fr and the axial load Fa, and adjusting the radial displacement and the axial displacement of the input shaft 2 of the gearbox; this step lasts 1-2 minutes.
7. Changing the direction and the magnitude of a radial load Fr exerted on the gearbox input shaft 2 and the direction and the magnitude of an axial load Fa exerted on the gearbox input shaft 2, wherein the number of radial loads Fr exerted on the gearbox input shaft 2 in different directions is at least four, and the number of radial loads Fr exerted on the gearbox input shaft 2 in the same direction in different magnitudes is at least two; changing the direction and magnitude of the axial load Fa exerted on the gearbox input shaft 2 as each pair of radial loads Fr exerted on the gearbox input shaft 2 changes direction and magnitude; this step lasts 2-4 minutes.
3. Observation of leaks
1. And (3) braking the driving main shaft, and observing whether leakage occurs at the joint of the metal corrugated pipe of the coupler and the inner and outer teeth of the coupler after the driving main shaft stops rotating.
2. If the lubricating oil leaks from the coupler, the coupler is disassembled and then overhauled; if the lubricating oil leakage does not occur in the coupler, the lubricating oil in the coupler is emptied, and then the coupler is disassembled.
4. Reverse assembly
1. Turning around the coupler, then fixedly connecting the external teeth at one end of the coupler for rail transit with the input shaft 2 of the gear box, and fixedly connecting the external teeth at the other end of the coupler for rail transit with the driving spindle 1.
2. And injecting sufficient lubricating oil into the coupler again, and sealing the oil injection hole after oil injection is finished.
5. Reverse rotation drive
1. The driving main shaft 1 is driven to rotate, and then the gear box input shaft 2 is driven to rotate through the coupler; in the process, the rotating speed of the input shaft 2 of the gear box is adjusted by adjusting the rotating speed of the driving main shaft 1; this step lasts 2-4 minutes.
2. As shown in fig. 6, a radial load Fr is applied to the gearbox input shaft 2, causing a radial displacement of the gearbox input shaft 2 relative to the drive spindle 1; changing the radial load Fr and adjusting the radial displacement of the input shaft 2 of the gear box; this step lasts for 1-2 minutes;
3. changing the direction and the magnitude of the radial load Fr applied to the gearbox input shaft 2, wherein the number of the radial loads Fr applied to the gearbox input shaft 2 in different directions is at least four, and the number of the radial loads Fr applied to the gearbox input shaft 2 in the same direction is at least two; this step lasts 1-2 minutes.
4. Applying an axial load Fa to the gearbox input shaft 2 to enable the gearbox input shaft 2 to generate axial displacement relative to the drive spindle 1; changing the magnitude of the axial load Fa to adjust the axial displacement of the input shaft 2 of the gearbox; this step lasts for 1-2 minutes;
5. changing the direction and magnitude of the axial load Fa applied to the gearbox input shaft 2, namely applying a reverse axial load Fa to the gearbox input shaft 2 and changing the magnitude of the axial load Fa applied to the gearbox input shaft 2; this step lasts 1-2 minutes.
6. Simultaneously applying a radial load Fr and an axial load Fa to the gearbox input shaft 2 to enable the gearbox input shaft 2 to generate radial displacement and axial displacement relative to the driving main shaft 1; changing the radial load Fr and the axial load Fa, and adjusting the radial displacement and the axial displacement of the input shaft 2 of the gearbox; this step lasts 1-2 minutes.
7. Changing the direction and the magnitude of the radial load Fr exerted on the gearbox input shaft 2 and the direction and the magnitude of the axial load Fa exerted on the gearbox input shaft 2, wherein the number of the radial loads Fr exerted on the gearbox input shaft 2 in different directions is at least four, and the number of the radial loads Fr exerted on the gearbox input shaft 2 in the same direction in different magnitudes is at least two; changing the direction and magnitude of the axial load Fa exerted on the gearbox input shaft 2 as each pair of radial loads Fr exerted on the gearbox input shaft 2 changes direction and magnitude; this step lasts 2-4 minutes.
6. Reexamination of leakage
1. And (3) braking the driving main shaft, and observing whether leakage occurs at the joint of the metal corrugated pipe of the coupler and the inner and outer teeth of the coupler after the driving main shaft stops rotating.
2. If the lubricating oil leaks from the coupler, the coupler is disassembled and then maintained; if the lubricating oil leakage does not occur in the coupler, the lubricating oil in the coupler is emptied, and then the coupler is disassembled and marked as a qualified product.
According to the invention, the actual working condition of the coupling is simulated, and then the leakage of lubricating oil is observed, so that a detection blind zone existing in a gas negative pressure detection mode can be avoided. The coupler works under the simulated actual working condition, so that the problems of the coupler can be fully exposed, the real and accurate reaction and the leakage fault of lubricating oil can be found, and the dynamic sealing performance detection can be realized.
Claims (8)
1. The technology for detecting the sealing performance of the coupling with the metal corrugated pipe is characterized by comprising the following steps of:
1. coupling assembly
(1-1) installing a coupling for rail transit between a driving main shaft and an input shaft of a gear box;
(1-2) injecting sufficient lubricating oil into the coupler, and sealing the oil injection hole after the oil injection is completed;
2. coupling rotary drive
(2-1) driving the driving main shaft to rotate and driving the input shaft of the gear box to rotate through the coupler; in the process, the rotating speed of the driving spindle is adjusted, and the step lasts for 2-4 minutes;
(2-2) applying a radial load Fr to the input shaft of the gearbox, and changing the magnitude of the radial load Fr to adjust the radial displacement of the input shaft of the gearbox, wherein the step lasts for 1-2 minutes;
(2-3) changing the direction and magnitude of the radial load Fr applied to the input shaft of the gearbox, which lasts for 1-2 minutes;
(2-4) applying an axial load Fa to the input shaft of the gear box, changing the size of the axial load Fa, and adjusting the axial displacement of the input shaft of the gear box, wherein the step lasts for 1-2 minutes;
(2-5) changing the direction and magnitude of the axial load Fa exerted on the input shaft of the gearbox, which step lasts for 1-2 minutes;
3. observation of leakage
(3-1) braking the driving spindle, and observing whether leakage occurs at the joint of the metal corrugated pipe of the coupler and the inner and outer teeth of the coupler after the driving spindle stops rotating;
(3-2) if lubricating oil leaks from the coupler, disassembling the coupler and then overhauling the coupler; and if the lubricating oil leakage does not occur in the coupler, emptying the lubricating oil in the coupler, and then disassembling the coupler and marking as a qualified product.
2. The tightness detection process for the coupling with the metal bellows according to claim 1, wherein in the step (2-3), at least four radial loads in different directions are applied to the input shaft of the gearbox, and at least two radial loads Fr in different directions are applied to the input shaft of the gearbox.
3. The tightness detection process for the coupling with metal bellows according to claim 2, characterized in that the following operations are performed after the steps (2-5):
(2-6) simultaneously applying a radial load Fr and an axial load Fa to the input shaft of the gear box, so that the input shaft of the gear box generates radial displacement and axial displacement relative to the driving main shaft; changing the radial load Fr and the axial load Fa, and adjusting the radial displacement and the axial displacement of the input shaft of the gear box; this step lasts 1-2 minutes.
4. The tightness detection process for the coupling with the metal bellows according to claim 3, characterized in that the following operations are performed after the steps (2-6):
(2-7) changing the direction and magnitude of the radial load Fr exerted on the input shaft of the gearbox and the direction and magnitude of the axial load Fa exerted on the input shaft of the gearbox, wherein the radial loads in different directions exerted on the input shaft of the gearbox are at least four, and the radial loads Fr in different magnitudes exerted on the input shaft of the gearbox in the same direction are at least two; changing the direction and the magnitude of the axial load Fa exerted on the input shaft of the gearbox when the direction and the magnitude of the radial load Fr exerted on the input shaft of the gearbox are changed; this step lasts 2-4 minutes.
5. The tightness detection process for the coupling with the metal bellows according to claim 4, characterized in that the following operations are performed after the step (3-2):
4. reverse assembly
(4-1) turning the coupler around, then fixedly connecting outer teeth at one end of the coupler for rail transit with an input shaft of a gear box, and fixedly connecting outer teeth at the other end of the coupler for rail transit with a driving main shaft;
(4-2) injecting sufficient lubricating oil into the coupler again, and sealing the oil injection hole after oil injection is completed;
5. reverse rotation drive
(5-1) driving the driving main shaft to rotate, and further driving the input shaft of the gear box to rotate through the coupler; in the process, the rotating speed of the input shaft of the gear box is adjusted by adjusting the rotating speed of the driving main shaft; this step lasts 2-4 minutes;
(5-2) applying a radial load Fr to the input shaft of the gear box, changing the size of the radial load Fr, and adjusting the radial displacement of the input shaft of the gear box; this step lasts for 1-2 minutes;
(5-3) changing the direction and magnitude of the radial load Fr applied to the input shaft of the gearbox, which lasts for 1-2 minutes;
(5-4) applying an axial load Fa to the input shaft of the gear box, and changing the magnitude of the axial load Fa to adjust the axial displacement of the input shaft of the gear box; this step lasts for 1-2 minutes;
(5-5) changing the direction and magnitude of the axial load Fa applied to the input shaft of the gearbox, which lasts for 1-2 minutes;
6. reexamination of leakage
(6-1) braking the driving spindle, and observing whether leakage occurs at the joint of the metal corrugated pipe of the coupler and the inner and outer teeth of the coupler after the driving spindle stops rotating;
(6-2) if lubricating oil leaks from the coupler, disassembling the coupler and then overhauling; if the lubricating oil leakage does not occur in the coupler, the lubricating oil in the coupler is emptied, and then the coupler is disassembled and marked as a qualified product.
6. The tightness detection process for the coupling with the metal bellows according to claim 5, wherein in the step (5-3), at least four radial loads are applied to the input shaft of the gearbox in different directions, and at least two radial loads Fr are applied to the input shaft of the gearbox in the same direction and have different magnitudes.
7. The tightness detection process for the coupling with the metal bellows according to claim 6, characterized in that after the step (5-5), the following operations are performed:
(5-6) simultaneously applying a radial load Fr and an axial load Fa to the input shaft of the gear box, so that the input shaft of the gear box generates radial displacement and axial displacement relative to the driving main shaft; changing the radial load Fr and the axial load Fa, and adjusting the radial displacement and the axial displacement of the input shaft of the gear box; this step lasts 1-2 minutes.
8. The tightness detection process for the coupling with the metal bellows according to claim 7, characterized in that after the steps (5-6), the following operations are performed:
(5-7) changing the direction and the magnitude of the radial load Fr applied to the input shaft of the gearbox and the direction and the magnitude of the axial load Fa applied to the input shaft of the gearbox, wherein the number of the radial loads Fr applied to the input shaft of the gearbox in different directions is at least four, and the number of the radial loads Fr applied to the input shaft of the gearbox in the same direction is at least two; changing the direction and the magnitude of the axial load Fa exerted on the input shaft of the gearbox when the direction and the magnitude of the radial load Fr exerted on the input shaft of the gearbox are changed; this step lasts 2-4 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211553045.2A CN115753087A (en) | 2022-12-06 | 2022-12-06 | Technology for detecting sealing performance of coupler with metal corrugated pipe |
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| CN202211553045.2A CN115753087A (en) | 2022-12-06 | 2022-12-06 | Technology for detecting sealing performance of coupler with metal corrugated pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116698293A (en) * | 2023-06-25 | 2023-09-05 | 无锡鸿海龙船机有限公司 | Coupler tightness detection equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116698293A (en) * | 2023-06-25 | 2023-09-05 | 无锡鸿海龙船机有限公司 | Coupler tightness detection equipment |
| CN116698293B (en) * | 2023-06-25 | 2024-04-26 | 无锡鸿海龙船机有限公司 | Coupler tightness detection equipment |
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