CN113500461B - Thickness on-line measuring instrument for copper pipe production line - Google Patents
Thickness on-line measuring instrument for copper pipe production line Download PDFInfo
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- CN113500461B CN113500461B CN202111043114.0A CN202111043114A CN113500461B CN 113500461 B CN113500461 B CN 113500461B CN 202111043114 A CN202111043114 A CN 202111043114A CN 113500461 B CN113500461 B CN 113500461B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/20—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring workpiece characteristics, e.g. contour, dimension, hardness
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Abstract
The invention relates to the technical field of copper pipe thickness measurement, in particular to an online thickness measuring instrument for a copper pipe production line. Through the inside circular conductor rail that is provided with of supporting disk, and the inside swing joint of supporting disk has rotary fixture, can supply power operation for the inside fixed subassembly of rotary fixture, there is rotary fixture through the inside swing joint of supporting disk, make the steel pipe can be fixed inside rotary fixture, and remove the measurement, then rotate, measure the other end, can will press from both sides tightly and carry out the rotary motion through the inside fixed subassembly of rotary fixture, make the data that comes out of test more accurate, reduce bad production.
Description
Technical Field
The invention relates to the technical field of copper pipe thickness measurement, in particular to an online thickness measuring instrument for a copper pipe production line.
Background
In the production line of copper pipe, need carry out on-line measuring to the back degree of copper pipe, traditional ultrasonic detection can only carry out the fixed point monitoring, but when carrying out the multiple spot and examining, seem very troublesome, in the copper pipe use, need carry out accurate measurement to thickness at the kneck, if there is the difficult condition of thickness in kneck, probably can't dock, so need carry out the multiple spot to the kneck and detect, but produce the ultrasonic detection machine and be not very convenient when carrying out the multiple spot and examine.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the online thickness measuring instrument for the copper pipe production line, which solves the problem of the complexity of multi-point detection by an ultrasonic detecting instrument during the traditional copper pipe detection, and increases the detection precision, so that the online thickness measuring instrument can perform high-precision poor detection.
(II) technical scheme
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides an online measuring instrument of thickness that copper pipe production line was used, includes the bottom plate, fixed surface is connected with a plurality of support columns, every on the bottom plate support column upper end fixedly connected with supporting disk, the inside circular conductor rail that is provided with of supporting disk, the inside swing joint of supporting disk has rotary fixture, the inside clamp connection of rotary fixture has the copper pipe, fixed surface installs measuring component on the bottom plate, measuring component one side swing joint copper pipe, fixed surface installs the second electric putter on the bottom plate.
Preferably, the rotary clamp comprises a first motor, the first motor is fixedly mounted on the upper surface of the bottom plate, and an output shaft of the first motor penetrates through the support plate and is fixedly connected with the rotary plate.
Preferably, sliding grooves are formed in two ends of the rotating plate, the inside of each sliding groove is movably connected with a circular conductive rail, a conductive ejector rod is fixedly installed inside each sliding groove, and the top end of each conductive ejector rod is movably connected with the circular conductive rail.
Preferably, the two ends of the rotating plate are respectively and movably provided with a round-head clamping rod through a spring, the round-head clamping rods are movably connected with the inner wall of the supporting plate, and the upper surface of the rotating plate is fixedly provided with a plurality of fixing components.
Preferably, the fixing component comprises a fixing claw, the fixing claw is fixedly arranged on the upper surface of the bottom plate, one side of the fixing claw is respectively and fixedly provided with a second motor and two third motors, an output shaft of the second motor penetrates through the fixing claw and is fixedly connected with a plurality of turntables, and the turntables are movably connected with the copper pipes.
Preferably, the insides of two sides of the fixed claw are respectively and movably connected with a first solenoid, two sides of the fixed claw are respectively and fixedly connected with a fixed disc, the fixed disc is movably installed with the first solenoids through a plurality of springs, and a first steel ball is movably installed in one end, far away from the fixed disc, of the first solenoid.
Preferably, the measuring assembly comprises a fixed seat, the fixed seat is movably arranged on the upper surface of the bottom plate, one side of the fixed seat is fixedly connected with the output end of the second electric push rod, a first electric push rod is fixedly arranged on the upper side of the fixed seat, the output end of the first electric push rod is fixedly connected with a spring plate group, and the upper surface of the spring plate group is fixedly connected with the measuring clamp.
Preferably, one side of the measuring clamp is movably connected with the copper pipe, the end part of the measuring clamp is respectively and movably provided with two second screw pipes, the inner sides of the two second screw pipes are respectively and movably provided with second steel balls, and an oil injection pipe is arranged on one side of the second screw pipes on the lower side.
Preferably, one of the shift levers at the tail of the measuring clamp is fixedly provided with an arc-shaped grating ruler, the other shift lever of the measuring clamp is fixedly connected with a connecting plate, one end of the connecting plate, far away from the shift lever, is fixedly connected with a sliding block of the arc-shaped grating ruler, the arc-shaped grating ruler is connected with a digital display box through a signal line, and the digital display box is fixedly arranged on the upper surface of the bottom plate.
Compared with the prior art, the invention has the following beneficial effects:
the invention can drive the rotating plate to rotate through the first motor, the round head clamping rods are respectively and movably arranged at the two ends of the rotating plate through the springs, when the round head clamping rods are contacted with the slotted holes in the supporting plate, the switch in the slotted holes stops the motor from rotating, then the polarity measurement operation is carried out on the copper pipe interface, after a period of time, the motor continues to rotate, the interface at the other end is measured in the same way, one side of the fixed claw is respectively and fixedly provided with the second motor and the two third motors, so that the second motor can drive the rotating disc to rotate, the rotating disc is arranged obliquely, the copper pipe can rotate and move transversely, the measurement is carried out by matching with the measurement assembly, and because the sizes of the copper pipes are different, the shorter copper pipe cannot complete the transverse movement through the rotating disc, the measurement clamp in the measurement assembly can be moved through the second electric push rod, then, measurement is carried out, a first solenoid is movably mounted through a fixed disc through a plurality of springs, a first steel ball is movably mounted in one end, far away from the fixed disc, of the first solenoid, the copper pipe is supported in an auxiliary mode, oil can be added to the first ball through an oil adding hole of the first solenoid to lubricate the first ball, the ball is prevented from rusting, and a claw of a fixed claw can be controlled to do clamping action through a third motor to clamp the copper pipe;
the invention can adjust the height of the measuring clamp to perform parallel operation with the copper pipe through the first electric push rod, two second screw pipes are respectively and movably arranged at the end parts of the measuring clamp, and second steel balls are respectively and movably arranged at the inner sides of the second screw pipes, so that the measuring clamp can be contacted with the copper pipe, the friction force of the rotation time of the copper pipe can be reduced through the second steel balls, a certain amount of lubricating oil can be stored through an oil filling pipe and an oil filling hole in the second screw pipe at the upper side, so that the second steel balls can rotate and perform continuous lubricating operation at the same time, when the measuring clamp clamps the rotating copper pipe, the measuring clamp moves on the arc grating ruler through the stress of the sliding block, the moving analog quantity data is transmitted to the digital display box through a data line to be displayed, and when the measuring clamp clamps the rotating copper pipe, if the thickness of the interface of the copper pipe exceeds or is less than a preset threshold value, and the PLC controls the loudspeaker at the upper side to give an alarm.
Drawings
FIG. 1 is a schematic view of the overall structure of an on-line thickness measuring instrument for a copper pipe production line according to the present invention;
FIG. 2 is a schematic structural view of a rotary clamp of an on-line thickness measuring instrument for a copper pipe production line according to the present invention;
FIG. 3 is a schematic structural diagram of a support plate of the online thickness measuring instrument for the copper pipe production line according to the present invention;
FIG. 4 is a schematic structural diagram of a fixing assembly of an online thickness measuring instrument for a copper pipe production line according to the present invention;
FIG. 5 is a schematic view of a first solenoid structure of an on-line thickness measuring instrument for a copper pipe production line according to the present invention;
FIG. 6 is a schematic view of a measuring assembly of the online thickness measuring instrument for the copper pipe production line according to the present invention;
FIG. 7 is an enlarged schematic structural view of the portion A in FIG. 2 of the online thickness measuring instrument for the copper pipe production line according to the present invention;
FIG. 8 is an enlarged schematic structural view of a portion B in FIG. 6 of the online thickness measuring instrument for the copper pipe production line according to the present invention;
FIG. 9 is an enlarged schematic structural view of the thickness on-line measuring instrument for copper pipe production line at C in FIG. 6.
In the figure: 1. a base plate; 2. rotating the clamp; 201. a first motor; 202. rotating the plate; 203. a round-head clamping rod; 204. a conductive ejector rod; 205. a chute; 206. a fixing assembly; 2061. a fixed jaw; 2062. a second motor; 2063. a turntable; 2064. a third motor; 2065. a first coil; 2066. a first steel ball; 2067. fixing the disc; 3. a support pillar; 4. a support disc; 5. a circular conductive rail; 6. a copper pipe; 7. a measurement assembly; 701. a digital display box; 702. a signal line; 703. a measuring clamp; 704. an arc grating ruler; 7041. a deflector rod; 7042. a slider; 7043. a connecting plate; 705. a fixed seat; 706. a first electric push rod; 707. a spring plate group; 708. a second coil; 709. a second steel ball; 710. an oil filling pipe; 8. a second electric push rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
As shown in fig. 1-9, an online thickness measuring instrument for a copper pipe production line comprises a bottom plate 1, wherein a plurality of support columns 3 are fixedly connected to the upper surface of the bottom plate 1, a support plate 4 is fixedly connected to the upper end of each support column 3, a circular conductive rail 5 is arranged inside each support plate 4, a rotating clamp 2 is movably connected inside each support plate 4, a copper pipe 6 is tightly clamped inside each rotating clamp 2, a measuring assembly 7 is fixedly mounted on the upper surface of the bottom plate 1, a copper pipe 6 is movably connected to one side of each measuring assembly 7, and a second electric push rod 8 is fixedly mounted on the upper surface of the bottom plate 1.
Through the technical scheme, be provided with circular conductor rail 5 through supporting disk 4 inside, and the inside swing joint of supporting disk 4 has rotary fixture 2, can supply power operation for the fixed subassembly 206 of rotary fixture 2 inside, there is rotary fixture 2 through the inside swing joint of supporting disk 4, make the steel pipe can be fixed in rotary fixture 2 inside, and remove the measurement, then rotate, measure the other end, can press from both sides tightly and carry out the rotational movement through the fixed subassembly 206 of rotary fixture 2 inside, cooperation measuring component 7, can let measuring component 7 and 6 interfaces of copper pipe measure along the helical path, make the data that comes out of test more accurate, reduce bad production.
In this embodiment, the rotary fixture 2 includes a first motor 201, the first motor 201 is fixedly installed on the upper surface of the bottom plate 1, the output shaft of the first motor 201 penetrates through the 4 fixedly connected rotating plates 202 of the supporting plate, the two ends of the rotating plates 202 are provided with the sliding grooves 205, the circular conductive rails 5 of the sliding grooves 205 are movably connected, the conductive ejector rods 204 are fixedly installed inside the sliding grooves 205, the circular conductive rails 5 of the top ends of the conductive ejector rods 204 are movably connected, the two ends of the rotating plates 202 are respectively provided with the round-head clamping rods 203 through springs in a movable mode, the round-head clamping rods 203 are movably connected with the inner wall of the supporting plate 4, and the upper surface of the rotating plates 202 is fixedly provided with the plurality of fixing assemblies 206. Can drive through first motor 201 and change board 202 and rotate, have button head kelly 203 through changeing board 202 both ends respectively through spring movable mounting for button head kelly 203 when contacting with the inside slotted hole of supporting disk 4, the inside switch of slotted hole stops the motor and rotates, then to 6 interface polarity measurement operations of copper pipe, after the one end time, the motor continues to rotate, measures the interface of the other end with the same reason.
In this embodiment, the fixing assembly 206 includes a fixing claw 2061, the fixing claw 2061 is fixedly installed on the upper surface of the bottom plate 1, one side of the fixing claw 2061 is respectively and fixedly installed with a second motor 2062 and two third motors 2064, an output shaft of the second motor 2062 passes through the fixing claw 2061 and is fixedly connected with a plurality of rotating discs 2063, the rotating discs 2063 are movably connected with the copper pipe 6, the insides of two sides of the fixing claw 2061 are respectively and movably connected with a first solenoid 2065, two sides of the fixing claw 2061 are respectively and fixedly connected with a fixing disc 2067, the fixing disc 2067 is movably installed with the first solenoid 2065 through a plurality of springs, and the inside of one end of the first solenoid 2065 far away from the fixing disc 2067 is movably installed with a first steel ball 2066. A second motor 2062 and two third motors 2064 are respectively and fixedly installed on one side of the fixed claw 2061, so that the second motor 2062 can drive the rotating disc 2063 to rotate, the rotating disc 2063 is obliquely arranged, the copper pipe 6 can rotate and move transversely and is matched with the measuring component 7 to measure, the copper pipe 6 with different sizes cannot move transversely through the rotating disc 2063, the measuring clamp 703 in the measuring component 7 can be moved through the second electric push rod 8 and then measured, the first solenoid 2065 is movably installed through the fixed disc 2067 through a plurality of springs, the first steel ball 2066 is movably installed in one end, far away from the fixed disc 2067, of the first solenoid 2065, the copper pipe 6 is supported in an auxiliary way, oil can be added to the first ball through an oil adding hole capable of being provided by the first solenoid 2065 to lubricate the first ball, the ball is prevented from rusting, and the claw of the fixed claw 2061 can be controlled to clamp through the third motor 2064, the copper tube 6 is clamped.
In this embodiment, the measuring assembly 7 includes a fixed base 705, the fixed base 705 is movably disposed on the upper surface of the bottom plate 1, one side of the fixed base 705 is fixedly connected to an output end of a second electric push rod 8, a first electric push rod 706 is fixedly mounted on the upper side of the fixed base 705, an output end of the first electric push rod 706 is fixedly connected to a spring plate group 707, a measuring clamp 703 is fixedly connected to the upper surface of the spring plate group 707, one side of the measuring clamp 703 is movably connected to a copper pipe 6, two second spiral pipes 708 are respectively and movably mounted at ends of the measuring clamp 703, second steel balls 709 are respectively and movably mounted at inner sides of the two second spiral pipes 708, an oil injection pipe 710 is disposed at one side of the lower second spiral pipe 708, one of the shift levers 7041 at the tail of the measuring clamp 703 is fixedly mounted to an arc grating ruler 704, another shift lever 7041 of the measuring clamp 703 is fixedly connected to a connecting plate 7043, one end of the connecting plate 7043, which is far away from the shift lever 7042, is fixedly connected to a slider 7042 of the arc grating ruler 704, the arc-shaped grating ruler 704 is connected with a digital display box 701 through a signal wire 702, and the digital display box 701 is fixedly arranged on the upper surface of the bottom plate 1. The height of the measuring clamp 703 can be adjusted by the first electric push rod 706 to operate in parallel with the copper pipe 6, the spring plate group 707 is composed of two metal plates through springs, two second spiral pipes 708 are movably installed at the end parts of the measuring clamp 703 respectively, and second steel balls 709 are movably installed at the inner sides of the second spiral pipes 708 respectively, so that the measuring clamp 703 can contact with the copper pipe 6, the friction force of the copper pipe 6 in rotation time can be reduced by the second steel balls 709, similarly, a certain amount of lubricating oil can be stored through the oil filling pipe and the oil filling hole inside the second spiral pipe 708 at the upper side, so that the second steel balls 709 can rotate and perform continuous lubrication operation at the same time, an arc grating ruler 704 is fixedly installed through one of the shift levers 7041 at the tail part of the measuring clamp 703, so that the slide block 7042 is forced to move on the arc grating ruler 704 when the measuring clamp 703 clamps the rotating copper pipe 6, and the moving analog quantity data is transmitted to the digital display box 701 through a data line to be displayed, the PLC in the digital display box 701 is set, so that when the rotating copper pipe 6 is clamped by the measuring clamp 703, if the thickness of the interface of the copper pipe 6 exceeds or is less than a preset threshold value, the PLC controls the loudspeaker on the upper side to give an alarm, and the connection of the PLC is the prior art, is not the creative characteristic of the invention, and is not described in detail.
The working principle of the online thickness measuring instrument for the copper pipe production line is as follows:
when the device is used, firstly, the rotating plate 202 can be driven to rotate by the first motor 201, the round-head clamping rods 203 are movably arranged at the two ends of the rotating plate 202 through the springs respectively, so that when the round-head clamping rods 203 are contacted with the slotted holes in the supporting plate 4, the switches in the slotted holes stop the motor to rotate, then the polarity measurement operation is carried out on the interfaces of the copper pipes 6, after one end time, the motor continues to rotate, the interfaces at the other end are measured in the same way, one side of the fixed claw 2061 is fixedly provided with the second motor 2062 and the two third motors 2064 respectively, so that the second motor 2062 can drive the rotating disc 2063 to rotate, the rotating disc 2063 is obliquely arranged, the copper pipes 6 can rotate and move transversely, the measurement assembly 7 is matched for measurement, and because the sizes of the copper pipes 6 are different, the shorter copper pipes 6 cannot move transversely through the rotating disc 2063, and the measuring clamp 703 in the measuring assembly 7 can be moved by the second electric push rod 8, then, measurement is carried out, a first solenoid 2065 is movably installed through a fixed disk 2067 and a plurality of springs, a first steel ball 2066 is movably installed inside one end of the first solenoid 2065, which is far away from the fixed disk 2067, so as to support the copper pipe 6 in an auxiliary way, oil can be added to the first ball through an oil filling hole of the first solenoid 2065 for lubrication, so as to prevent the ball from rusting, a claw of a fixed claw 2061 can be controlled by a third motor 2064 to clamp the copper pipe 6, the height of a measuring clamp 703 can be adjusted by a first electric push rod 706 to be operated in parallel with the copper pipe 6, an arc-shaped grating ruler 704 is fixedly installed through one shifting lever 7041 at the tail of the measuring clamp 703, so that when the measuring clamp 703 clamps the rotating copper pipe 6, a sliding block 7042 is stressed on the arc-shaped grating ruler 704 to move, and the moving analog quantity data is transmitted to a number display box 701 through a data line for display, through setting up the inside PLC controller of logarithmic display case 701 for when measuring the clamp 703 and pressing from both sides rotatory copper pipe 6, if when copper pipe 6 kneck thickness exceeded or was less than preset threshold value, send out the police dispatch newspaper through the speaker of PLC controller control upside.
The specific specifications of the first motor 201, the second motor 2062, and the third motor 2064 are HF-SP102K, and the specific specifications of the first electric push rod 706 and the second electric push rod 8 are F10-300 BC.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a thickness on-line measuring instrument that copper pipe production line was used, includes bottom plate (1), its characterized in that: the upper surface of the bottom plate (1) is fixedly connected with a plurality of supporting columns (3), the upper end of each supporting column (3) is fixedly connected with a supporting plate (4), a circular conductive rail (5) is arranged in each supporting plate (4), a rotary clamp (2) is movably connected in each supporting plate (4), a copper pipe (6) is tightly clamped and connected in each rotary clamp (2), a measuring assembly (7) is fixedly arranged on the upper surface of the bottom plate (1), the copper pipe (6) is movably connected at one side of the measuring assembly (7), a second electric push rod (8) is fixedly arranged on the upper surface of the bottom plate (1), each rotary clamp (2) comprises a first motor (201), an output shaft of each first motor (201) penetrates through each supporting plate (4) to be fixedly connected with a rotating plate (202), and a plurality of fixing assemblies (206) are fixedly arranged on the upper surface of each rotating plate (202), the fixing assembly (206) comprises a fixing claw (2061), the fixing claw (2061) is fixedly installed on the upper surface of the bottom plate (1), one side of the fixing claw (2061) is respectively and fixedly provided with a second motor (2062) and two third motors (2064), and an output shaft of the second motor (2062) penetrates through the fixing claw (2061) and is fixedly connected with a plurality of rotary discs (2063).
2. The on-line thickness measuring instrument for the copper pipe production line according to claim 1, wherein: the first motor (201) is fixedly arranged on the upper surface of the bottom plate (1).
3. The on-line thickness measuring instrument for the copper pipe production line as recited in claim 2, wherein: the improved electric conduction switch is characterized in that sliding grooves (205) are formed in two ends of the rotating plate (202), the inside of each sliding groove (205) is movably connected with a circular conductive rail (5), a conductive ejector rod (204) is fixedly installed inside each sliding groove (205), and the top end of each conductive ejector rod (204) is movably connected with the circular conductive rail (5).
4. An on-line thickness measuring instrument for a copper pipe production line according to claim 3, characterized in that: the two ends of the rotating plate (202) are respectively and movably provided with a round-head clamping rod (203) through a spring, and the round-head clamping rod (203) is movably connected with the inner wall of the supporting plate (4).
5. The on-line thickness measuring instrument for the copper pipe production line as recited in claim 4, wherein: the rotary disc (2063) is movably connected with the copper pipe (6).
6. An on-line thickness measuring instrument for a copper pipe production line according to claim 5, wherein: the utility model discloses a fixing clamp for fixing steel ball (206) and steel ball (2066), including stationary dog (2061) both sides, stationary dog (2061) both sides are inside respectively swing joint have first solenoid (2065), stationary dog (2061) both sides are fixedly connected with fixed disk (2067) respectively, fixed disk (2067) are through the first solenoid (2065) of a plurality of spring movable mounting, the inside movable mounting of one end that fixed disk (2067) were kept away from in first solenoid (2065) has first steel ball (2066).
7. The on-line thickness measuring instrument for the copper pipe production line according to claim 1, wherein: the measuring component (7) comprises a fixed seat (705), the fixed seat (705) is movably arranged on the upper surface of the bottom plate (1), one side of the fixed seat (705) is fixedly connected with the output end of a second electric push rod (8), a first electric push rod (706) is fixedly arranged on the upper side of the fixed seat (705), the output end of the first electric push rod (706) is fixedly connected with a spring plate group (707), and the upper surface of the spring plate group (707) is fixedly connected with a measuring clamp (703).
8. The on-line thickness measuring instrument for copper pipe production lines as claimed in claim 7, wherein: the measuring clamp is characterized in that one side of the measuring clamp (703) is movably connected with a copper pipe (6), the end part of the measuring clamp (703) is respectively and movably provided with two second screw pipes (708), the inner sides of the two second screw pipes (708) are respectively and movably provided with second steel balls (709), and the lower side of the measuring clamp is provided with an oil injection pipe (710) on one side of the second screw pipes (708).
9. The on-line thickness measuring instrument for copper pipe production lines as claimed in claim 8, wherein: one of them driving lever (7041) fixed mounting of measurement clamp (703) afterbody has arc grating chi (704), another driving lever (7041) fixedly connected with connecting plate (7043) of measurement clamp (703), slider (7042) of one end fixedly connected with arc grating chi (704) of driving lever (7041) are kept away from in connecting plate (7043), arc grating chi (704) are connected with digital display case (701) through signal line (702), digital display case (701) fixed mounting is in bottom plate (1) upper surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111043114.0A CN113500461B (en) | 2021-09-07 | 2021-09-07 | Thickness on-line measuring instrument for copper pipe production line |
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| CN202111043114.0A CN113500461B (en) | 2021-09-07 | 2021-09-07 | Thickness on-line measuring instrument for copper pipe production line |
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| CN113500461B true CN113500461B (en) | 2021-11-12 |
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