CN-121856040-B - Pipeline compression resistance testing device and testing method thereof

CN121856040BCN 121856040 BCN121856040 BCN 121856040BCN-121856040-B

Abstract

The invention relates to the technical field of pipeline compression testing devices, and discloses a pipeline compression testing device and a testing method thereof, wherein the device comprises a supporting mechanism, a measuring mechanism and an adjusting component, the measuring mechanism is positioned in the supporting mechanism, the adjusting component is positioned at one side of the measuring mechanism, the support mechanism comprises a gantry bracket, the bottom of the gantry bracket is provided with a bearing platform, and the middle part of the gantry bracket is slidably provided with a measuring support rod. The electromagnet drives the sliding plate to control the limiting spring I, so that the inner diameter measuring cross rod is automatically attached to the inner wall of the pipeline, and the automatic centering is realized by combining the feedback of the displacement sensor. The design ensures the reliability of fixation, avoids the interference of rigid constraint on deformation measurement, and remarkably improves the test precision and the operation convenience.

Inventors

YANG YIGANG
JING XIN
YIN LEI
WU HAITAO
Si Chunhong
WANG RUIBIN
CHU JIAXIN
YU XUEQIN
LU LINLIN

Assignees

烟台市建工检测服务中心有限公司

Dates

Publication Date: 20260512
Application Date: 20260316

Claims (7)

1. The pipeline compression testing device comprises a supporting mechanism (1), a measuring mechanism (2) and an adjusting component (3), wherein the measuring mechanism (2) is positioned in the supporting mechanism (1), and the adjusting component (3) is positioned on one side of the measuring mechanism (2), and the pipeline compression testing device is characterized in that the supporting mechanism (1) comprises a gantry bracket (101), a bearing platform (102) is arranged at the bottom of the gantry bracket (101), a measuring supporting rod (104) is slidably arranged in the middle of the gantry bracket (101), and the left side and the right side of the measuring supporting rod (104) are slidably connected with the left side and the right side of the inner wall of the gantry bracket (101); The measuring support rod (104) is internally provided with a hydraulic push rod (105), the output end of the hydraulic push rod (105) is provided with a hydraulic plate (106), and the hydraulic plate (106) is vertically arranged in the gantry bracket (101); The measuring mechanism (2) comprises a first longitudinal connecting rod (201), the top of the first longitudinal connecting rod (201) is movably arranged at the bottom of a measuring supporting rod (104), the first longitudinal connecting rod (201) is mutually perpendicular to the measuring supporting rod (104), one end, far away from the measuring supporting rod (104), of the first longitudinal connecting rod (201) is provided with a first limiting ring (203), the first limiting ring (203) is fixedly arranged on the outer side of the bottom end of the first longitudinal connecting rod (201), a first limiting spring (204) is arranged above the first limiting ring (203), the first limiting spring (204) penetrates through the first longitudinal connecting rod (201) and is positioned at the top of the first limiting ring (203), an inner diameter measuring unit is clamped on the outer side surface of the first longitudinal connecting rod (201), and the measuring mechanism (2) further comprises a measuring pipeline (205); The adjusting assembly (3) comprises a sliding groove, the sliding groove is positioned on the surface of the bearing platform (102), a linear driving device (108) is arranged in the sliding groove, a sliding block is arranged at the output end of the linear driving device (108), the outer side surface of the sliding block is in sliding connection with the inside of the sliding groove, and the upper part of the sliding block is connected with the sliding clamp (301); The device comprises linear driving equipment (108), sliding blocks and sliding clamps (301), wherein the number of the linear driving equipment (108), the sliding blocks and the sliding clamps (301) is at least two, the linear driving equipment (108), the sliding blocks and the sliding clamps (301) are symmetrically arranged on the surface of a bearing platform (102), the two symmetrically arranged linear driving equipment (108) can drive the two sliding blocks to be close to or far away from each other along the inner part of a sliding groove, the linear driving equipment (108) can clamp and position the surface of a measuring pipeline (205) through the sliding clamps (301), the inner part of the sliding clamps (301) comprises a flexible clamping plate (302) and a piston mechanism, the piston mechanism consists of a micro push rod (303) and a piston plate (305), the flexible clamping plate (302) is located in the inner part of the sliding clamps (301), one side of the flexible clamping plate (302) is hinged with one side of the inner wall of the sliding clamps (301), the other side of the flexible clamping plate (302) is movably connected with the sliding plate (308) through a contraction band (306), the contraction band (306) sequentially covers the flexible clamping plate (302) and the sliding clamps (301), and the flexible clamping plate (301) and the flexible clamping plate (302) is provided with a plurality of through holes (302) formed in the inner part of the sliding clamping plate (301).
2. The device for testing the pressure resistance of a pipeline according to claim 1, wherein the inner diameter measuring unit comprises two inner diameter measuring cross bars (202) and a displacement sensor, wherein a pretensioned steel wire is arranged in the displacement sensor, and the pretensioned steel wire is positioned between the two inner diameter measuring cross bars (202); the end part of one inner diameter measuring cross rod (202) is movably connected with the outer side surface of the first longitudinal connecting rod (201), the end part of the inner diameter measuring cross rod (202) close to the first longitudinal connecting rod (201) is in contact with the end part of the first limiting spring (204), and the first limiting spring (204) can be matched with the first limiting ring (203) to limit the end part of the inner diameter measuring cross rod (202).
3. The device for testing the pressure resistance of the pipeline according to claim 2, wherein the measuring mechanism (2) further comprises a second longitudinal connecting rod (208), the second longitudinal connecting rod (208) is located at the top of the bearing platform (102), a second limiting ring (206) is arranged at one end, far away from the bearing platform (102), of the second longitudinal connecting rod (208), a second limiting spring (207) is arranged at the top of the second limiting ring (206), the second limiting spring (207) is sleeved on the outer side surface of the second longitudinal connecting rod (208), and the outer side surface of the second longitudinal connecting rod (208) is movably connected with another inner diameter measuring cross rod (202).
4. The device for testing the pressure resistance of the pipeline according to claim 3, wherein two ends of the limiting spring II (207) are respectively contacted with the limiting ring II (206) and the end part of the inner diameter measuring cross rod (202), the limiting spring II (207) limits the end part of the inner diameter measuring cross rod (202) through the limiting ring II (206), the outer side surfaces of the two inner diameter measuring cross rods (202) are respectively positioned at the top and the bottom of the inner wall of the measuring pipeline (205), and the outer side surfaces of the two inner diameter measuring cross rods (202) are tightly attached to the inner diameter surface of the measuring pipeline (205).
5. The pipeline compression testing device according to claim 1, wherein the piston mechanism is located inside the sliding clamp (301), the micro push rod (303) is fixedly arranged on one side, away from the flexible clamp plate (302), of the inner wall of the sliding clamp (301), one end, close to the flexible clamp plate (302), of the micro push rod (303) is fixedly connected with one side of the piston plate (305), the periphery of the piston plate (305) is tightly contacted with the periphery of the inner wall of the sliding clamp (301), the micro push rod (303) can control the piston plate (305) to slide inside the sliding clamp (301), the piston plate (305) is matched with the flexible clamp plate (302) and the connecting belt to form a sealing space inside the sliding clamp (301), and an air inlet hole is formed in one side, close to the micro push rod (303), of the inner wall of the sliding clamp (301).
6. The device of claim 5, wherein when the micro-push rod (303) is in an extended state, the piston plate (305) moves along the inner wall of the sliding clamp (301) towards the direction of the flexible clamp plate (302), and external air enters the area between the piston plate (305) and the micro-push rod (303), the area between the piston plate (305) and the micro-push rod (303) is always in a positive pressure balance state, the flexible clamp plate (302) deflects along one side of the sliding clamp (301) towards a direction away from the piston plate (305), and the air pressure between the piston plate (305) and the flexible clamp plate (302) gradually increases; When the micro push rod (303) is in a fully extended state, the piston plate (305) moves along the inner wall of the sliding clamp (301) towards the direction of the flexible clamp plate (302), the area between the piston plate (305) and the micro push rod (303) sucks external air into the interior, the area between the piston plate (305) and the micro push rod (303) is always in a positive pressure balance state, the flexible clamp plate (302) deflects to a maximum angle along one side of the sliding clamp (301) towards a direction away from the piston plate (305), the air pressure between the piston plate (305) and the flexible clamp plate (302) gradually rises, and a plurality of films (304) on the flexible clamp plate (302) are in an expanded state; The adjusting assembly (3) further comprises electromagnets (307) and sliding plates (308), the number of the electromagnets (307) and the number of the sliding plates (308) are multiple, each electromagnet (307) is located on one side of a first limiting ring (203) and one side of a second limiting ring (206), each sliding plate (308) is sleeved on the outer side surfaces of a first longitudinal connecting rod (201) and a second longitudinal connecting rod (208), one side of each sliding plate (308) is connected with one end of a first limiting spring (204) and one end of a second limiting spring (207) mutually, and the electromagnets (307) can drive the sliding plates (308) to longitudinally move.
7. A method of testing a pipeline compression testing apparatus, using a pipeline compression testing apparatus as claimed in claim 1, comprising the steps of: S1, controlling the measuring support rod (104) to longitudinally slide and descend in the gantry bracket (101) to drive the first longitudinal connecting rod (201) and the inner diameter measuring unit arranged on the first longitudinal connecting rod to enter the measuring pipeline (205) until the inner diameter measuring unit keeps contact with the inner wall of the measuring pipeline (205) under the pretightening force of the first limiting spring (204), so as to initially position the measuring pipeline (205); S2, detecting whether the measuring pipeline (205) is in an inclined state or not in real time by using the measuring mechanism (2), and finely fine-tuning and centering the measuring pipeline (205) by using the adjusting component (3) until the data of the measuring mechanism (2) are in a normal threshold value; S3, driving the hydraulic plate (106) to move downwards through the hydraulic push rod (105), applying pressure to the outer wall of the pipeline, meanwhile, monitoring and acquiring deformation data of the pipeline in a pressed state by the inner diameter measuring unit, and controlling the pressure application and release of the hydraulic push rod (105) according to the deformation data monitored by the inner diameter measuring unit so as to complete a test cycle.

Description

Pipeline compression resistance testing device and testing method thereof Technical Field The invention relates to the technical field of pipeline compression testing devices, in particular to a pipeline compression testing device and a pipeline compression testing method. Background The pipeline is used as an important industrial conveying element, the compression resistance is a key index for evaluating the structural safety and the service life, and in the fields of petrochemical industry, municipal engineering and the like, the pipeline is required to bear complex stresses such as internal fluid pressure, external soil load and the like, so that the compression resistance test becomes a core link of product quality control. The patent of China of bulletin number CN217277479U of authorizing discloses a pipeline resistance to compression testing arrangement, relates to bellows resistance to compression technical field, including unable adjustment base, unable adjustment base's upper surface fixed mounting has U type frame, the central fixed mounting of U type frame has the pneumatic cylinder, the output fixed mounting of pneumatic cylinder has the stripper plate, unable adjustment base's central internally mounted has rebound mechanism, rebound mechanism includes the convex spout, the convex spout is seted up inside unable adjustment base's center. According to the prior art, when the hydraulic plate presses downwards in the process of performing the compression test on the pipeline, the pipeline may roll, slide or slightly lift up on the platform due to the reaction force, so that the boundary condition of the test is destroyed, the measurement result cannot truly reflect the pure compression deformation of the pipeline, and when the pipeline is manually sleeved into the two inner diameter measurement cross bars, the pipeline axis is difficult to ensure that the pipeline axis is completely vertically aligned with the center line of the gantry bracket and the force application center of the hydraulic plate, and the pipeline is slightly deflected or not aligned, so that the problem of unexpected bending or torsion is caused when the pipeline is pressed subsequently. Disclosure of Invention The invention aims to provide a pipeline compression resistance testing device and a testing method thereof, which are used for solving the problems in the background technology. The pipeline compression testing device comprises a supporting mechanism, a measuring mechanism and an adjusting component, wherein the measuring mechanism is positioned in the supporting mechanism, the adjusting component is positioned on one side of the measuring mechanism, the supporting mechanism comprises a gantry bracket, a bearing platform is arranged at the bottom of the gantry bracket, a measuring supporting rod is slidably arranged in the middle of the gantry bracket, and the left side and the right side of the measuring supporting rod are slidably connected with the left side and the right side of the inner wall of the gantry bracket; The hydraulic push rod is arranged in the measuring support rod, a hydraulic plate is arranged at the output end of the hydraulic push rod, the hydraulic plate is vertically arranged in the gantry bracket, and the hydraulic push rod can control the hydraulic plate to longitudinally move in the gantry bracket; The measuring mechanism comprises a first longitudinal connecting rod, the top of the first longitudinal connecting rod is movably arranged at the bottom of a measuring supporting rod, the first longitudinal connecting rod is perpendicular to the measuring supporting rod, one end of the first longitudinal connecting rod, which is far away from the measuring supporting rod, is provided with a first limiting ring, the first limiting ring is fixedly arranged on the outer side of the bottom end of the first longitudinal connecting rod, a first limiting spring is arranged above the first limiting ring, and penetrates through the first longitudinal connecting rod and is positioned at the top of the first limiting ring, an inner diameter measuring unit is clamped on the outer side surface of the first longitudinal connecting rod, and the measuring mechanism further comprises a measuring pipeline. Preferably, the inner diameter measuring unit comprises two inner diameter measuring crossbars and a displacement sensor, wherein a pretensioned steel wire is arranged in the displacement sensor, and the pretensioned steel wire is positioned between the two inner diameter measuring crossbars; The end part of one inner diameter measuring cross rod is movably connected with the outer side surface of the first longitudinal connecting rod, the end part of the inner diameter measuring cross rod, which is close to the first longitudinal connecting rod, is in contact with the end part of the first limiting spring, and the first limiting spring can be matched with the limiting rings to limit the end parts of the pair of i