CN-122016513-A - Welding strength detection device for internal thread copper pipe

CN122016513ACN 122016513 ACN122016513 ACN 122016513ACN-122016513-A

Abstract

The invention relates to the technical field of copper pipe detection, in particular to an internal thread copper pipe welding strength detection device which comprises an annular guide rail, two sliding seats and a driving unit, wherein the two sliding seats are arranged on the annular guide rail in a sliding mode, a clamping unit and a detection unit are arranged on the sliding seats, and the clamping unit is used for fixing a copper pipe. The invention effectively solves the problems of low speed and low efficiency of the traditional detection mode, replaces the traditional axial stretching detection by using bending detection, and ensures that the moment required by bending the copper pipe is far smaller than the pulling force required by breaking the copper pipe along the axial direction, so the detection mode is more convenient, the structure is simple, the equipment cost is greatly reduced, meanwhile, the copper pipe can realize rapid bending, the detection speed is faster, the efficiency is higher, and the offset angles of base materials at two sides of a welding position are detected, thereby the welding strength can be rapidly judged to be qualified, and the judgment mode is simpler and more efficient.

Inventors

JIANG LIPING
Liu Hongkou
WANG HUI
ZHOU JIE

Assignees

常州润来科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260408

Claims (8)

1. The welding strength detection device for the internal thread copper pipe is characterized by comprising an annular guide rail, two sliding seats and a driving unit, wherein the two sliding seats are arranged on the annular guide rail in a sliding manner, a clamping unit and a detection unit are arranged on the sliding seats, the clamping unit is used for fixing the copper pipe, the clamping unit can rotate on the sliding seats through a supporting column, and the detection unit is used for detecting the rotation angle of the supporting column on the sliding seats; The driving unit is used for driving the two clamping units to mutually approach and bend the copper pipe along the track of the annular guide rail; The clamping unit comprises a cylinder body and a plurality of extrusion blocks which are arranged on the inner side of the cylinder body and distributed along the circumferential direction of the cylinder body, and the extrusion blocks are close to or far away from the axis of the cylinder body; the cylinder body consists of two coaxially arranged single cylinders, the plurality of extrusion blocks are divided into two groups corresponding to the two single cylinders, and the extrusion blocks in the two single cylinders are staggered in the circumferential direction of the single cylinders; the single cylinder inner wall is provided with a guide seat corresponding to each extrusion block, the extrusion blocks slide on the guide seat in an inclined manner, the movement directions of the extrusion blocks in the two single cylinders are opposite, one single cylinder is rotationally connected with the extrusion blocks in the other single cylinder through a plurality of push-pull rods, and the two single cylinders are connected through an oil cylinder.
2. The welding strength detection device for the internal thread copper pipe according to claim 1, wherein the clamping unit further comprises a bottom frame connected with the supporting column, two supporting rings arranged on the bottom frame and an auxiliary ring arranged on one supporting ring, the fixed end of the oil cylinder is arranged on the auxiliary ring, two single cylinders are respectively arranged in the two supporting rings, one single cylinder is rotatably arranged in the corresponding supporting ring, and the other single cylinder is rotatably and slidably arranged in the corresponding supporting ring; The auxiliary ring is provided with a side plate, the side plate is provided with a clamping groove, and the single cylinder is provided with a clamping edge matched with the clamping groove.
3. The device for detecting the welding strength of the copper tube with internal threads according to claim 2, wherein a plurality of clamping grooves are arranged in the axial direction of the single tube.
4. The welding strength detection device for the internal thread copper pipe according to claim 2, wherein a push plate is arranged on one single cylinder, the push plate is connected with the auxiliary ring through an elastic body, and a jacking column for limiting the push plate is arranged on the auxiliary ring; The movable end of the oil cylinder is provided with a long table, the long table is provided with a chute, a sliding column is arranged in the chute in a sliding manner, and the sliding column is connected with the corresponding single cylinder.
5. The welding strength detection device for the internal thread copper pipe according to claim 2, wherein the auxiliary ring is rotatably arranged on the supporting ring, and after the copper pipe is bent once and reset, the auxiliary ring is driven by the power motor to rotate by 90 degrees and bend the copper pipe again.
6. The device for detecting the welding strength of the copper tube with internal threads according to claim 1, wherein the detecting unit comprises a fan-shaped resistor piece which is arranged on the sliding seat and is coaxial with the supporting column, and a first conductive plate which is arranged on the supporting column and is in sliding contact with the fan-shaped resistor piece, one end of the fan-shaped resistor piece and the first conductive plate are connected into an external circuit, and the fan-shaped resistor piece and the first conductive plate are electrically connected with each other.
7. The welding strength detection device for the internal thread copper pipe according to claim 1, wherein a lath coaxial with the supporting column is arranged on the sliding seat, a plurality of electromagnets are arranged on the lath along the lath track, a second conductive plate and a permanent magnet are arranged on the outer wall of the supporting column in a staggered mode, and in the rotating process of the supporting column, the second conductive plate is electrically connected with at least one electromagnet, and the permanent magnet is matched with the electromagnets.
8. The welding strength detection device for the internal thread copper pipe according to claim 1, wherein a round seat is arranged at the bottom of the annular guide rail, a transmission column is rotatably arranged on the round seat, connecting rods are arranged on two sliding seats, the two connecting rods are connected through a transmission belt, the transmission belt bypasses the transmission column and is transmitted, and a plurality of auxiliary rollers for supporting the transmission belt are arranged on the round seat; The round seat is provided with a transmission rack in a sliding manner, the transmission rack is connected with one connecting rod, and the transmission rack provides power through a driving motor and a transmission gear; the two sliding seats are connected through a spring.

Description

Welding strength detection device for internal thread copper pipe Technical Field The invention relates to the technical field of copper pipe detection, in particular to a welding strength detection device for an internal thread copper pipe. Background In the fields of refrigeration, heating ventilation, energy chemical industry and the like, an internal thread copper pipe has become a core component of a key heat exchanger (such as an evaporator and a condenser) by virtue of excellent heat conduction efficiency, compact heat exchange area and good compression resistance, and in practical application, a plurality of copper pipes are often connected in a welding (mainly brazing) mode to form a loop, so that the quality of a welded joint directly determines the sealing reliability, long-term operation safety and energy efficiency level of the whole heat exchange system. At present, destructive detection of the strength of a copper pipe welded joint in the industry generally adopts an axial tensile test method, wherein two ends of a to-be-detected welded joint sample are fixed on a tensile test machine, tensile force with opposite directions is applied along the axial direction of a pipe fitting, whether the sample is broken or obviously deformed at a welding position finally is observed, and whether the welding strength reaches the strength standard is judged. Disclosure of Invention The invention provides a welding strength detection device for an internal thread copper pipe, which can effectively solve the problems in the background technology. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The welding strength detection device for the internal thread copper pipe comprises an annular guide rail, two sliding seats and a driving unit, wherein the two sliding seats are arranged on the annular guide rail in a sliding manner, a clamping unit and a detection unit are arranged on the sliding seats, the clamping unit is used for fixing the copper pipe, the clamping unit can rotate on the sliding seats through a supporting column, and the detection unit is used for detecting the rotation angle of the supporting column on the sliding seats; The driving unit is used for driving the two clamping units to mutually approach and bend the copper pipe along the track of the annular guide rail. Further, the clamping unit comprises a cylinder body and a plurality of extrusion blocks which are arranged on the inner side of the cylinder body and distributed along the circumferential direction of the cylinder body, and the extrusion blocks are close to or far away from the axis of the cylinder body. Further, the cylinder body is composed of two coaxially arranged single cylinders, the plurality of extrusion blocks are divided into two groups corresponding to the two single cylinders, and the plurality of extrusion blocks in the two single cylinders are staggered in the circumferential direction of the single cylinders; the single cylinder inner wall is provided with a guide seat corresponding to each extrusion block, the extrusion blocks slide on the guide seat in an inclined manner, the movement directions of the extrusion blocks in the two single cylinders are opposite, one single cylinder is rotationally connected with the extrusion blocks in the other single cylinder through a plurality of push-pull rods, and the two single cylinders are connected through an oil cylinder. Further, the clamping unit further comprises a bottom frame connected with the supporting columns, two supporting rings arranged on the bottom frame and an auxiliary ring arranged on one supporting ring, the fixed end of the oil cylinder is arranged on the auxiliary ring, two single cylinders are respectively arranged in the two supporting rings, one single cylinder is rotatably arranged in the corresponding supporting ring, and the other single cylinder is rotatably and slidably arranged in the corresponding supporting ring; The auxiliary ring is provided with a side plate, the side plate is provided with a clamping groove, and the single cylinder is provided with a clamping edge matched with the clamping groove. Further, a plurality of clamping grooves are arranged along the axis direction of the single cylinder. Further, a push plate is arranged on one single cylinder, the push plate is connected with the auxiliary ring through an elastomer, and a jacking column for limiting the push plate is arranged on the auxiliary ring; The movable end of the oil cylinder is provided with a long table, the long table is provided with a chute, a sliding column is arranged in the chute in a sliding manner, and the sliding column is connected with the corresponding single cylinder. Furthermore, the auxiliary ring is rotatably arranged on the supporting ring, and after the copper pipe is bent once and reset, the auxiliary ring is driven by the power motor to rotate by 90 degrees and bend the copper pipe again. Further,