CN113948935B - Intelligent hydraulic machine for wire connection based on contact resistance - Google Patents
Intelligent hydraulic machine for wire connection based on contact resistance Download PDFInfo
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- CN113948935B CN113948935B CN202111199517.4A CN202111199517A CN113948935B CN 113948935 B CN113948935 B CN 113948935B CN 202111199517 A CN202111199517 A CN 202111199517A CN 113948935 B CN113948935 B CN 113948935B
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- crimping
- wire
- measuring
- splicing sleeve
- module
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
- H01R43/048—Crimping apparatus or processes
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Electrical Connectors (AREA)
Abstract
The intelligent wire connection hydraulic press based on the contact resistance comprises a control device, a power device, a crimping device and a measuring device; the control device is connected with the power device, the power device is connected with the crimping device, and the measuring device is connected with the control device; the power device is used for providing power for wire crimping; the crimping device is used for conducting wire crimping operation; and the measuring device is used for measuring the resistance of the wire crimping part and the opposite side distance of the wire section in the crimping process in real time and transmitting data to the control device. After the splicing sleeve is crimped by the hydraulic press, the splicing sleeve meets the opposite side requirement in the specification and has uniform resistance distribution, so that the crimping quality and the precision of the splicing sleeve are improved, and the crimping error caused by nonstandard manual operation is reduced.
Description
Technical Field
The invention relates to a transmission wire crimping hydraulic press, in particular to a wire connection intelligent hydraulic press based on contact resistance.
Background
The overhead transmission line leads, the ground wires and the jumper wires are generally connected by adopting splicing tubes and the like. In the running process of the overhead transmission line, the splicing sleeve not only bears all the tension of the wire, but also plays an overcurrent role. Analysis of line accidents has found that most accidents are caused by the fact that the crimping operation of the splicing sleeve does not meet relevant regulations. The quality level of the splicing sleeve after crimping becomes an important factor for measuring the safe operation of the power grid.
The common crimping method is hydraulic pressure, and a trained operator carries out crimping according to the steps in the specification (SDJ 226-87, hydraulic construction procedure for overhead transmission line conductors and lightning conductors). Because the level of the operators is uneven, and the influence of artificial factors such as construction experience, construction habit, responsibility and the like is added, the uniform crimping quality is difficult to ensure in actual operation. Therefore, to improve the crimping quality of the splicing sleeve, it is necessary to provide a more intelligent wire splicing device.
Common problems of manual crimping are: ① During crimping, workers hold the splicing sleeve, manual instability often causes that the bending degree of the splicing sleeve body after crimping does not reach the standard, and the bending degree is not more than 2% according to the rule of acceptance regulations; ② The contact resistance of the splicing sleeve is uneven, and the main reason is that manual crimping cannot control the crimping accuracy and cannot ensure that the crimping effect of each time is the same, and the manual method is to continue for a period of time under a certain pressure, so that most of experience judgment is adopted. If the contact resistance is overlarge at a certain place, when the circuit is in a high-load operation condition, local heating and overhigh temperature can be caused to damage the wires, so that the connection strength is reduced. In view of this, it is necessary to provide an intelligent hydraulic press for wire connection based on contact resistance.
Disclosure of Invention
The invention provides an intelligent wire connection hydraulic machine based on contact resistance, which controls the pressure and the speed of the hydraulic machine by monitoring the opposite side distance of the wire section and the resistance of a connection tube in real time, and after the connection tube is connected by the hydraulic machine, the connection tube meets the opposite side requirement in the specification and has uniform resistance distribution, thereby improving the connection tube connection quality and accuracy and reducing the connection error caused by nonstandard manual operation.
The technical scheme adopted by the invention is as follows:
wire connection intelligent hydraulic press based on contact resistance includes:
the device comprises a control device, a power device, a crimping device and a measuring device;
the control device is connected with the power device, the power device is connected with the crimping device, and the measuring device is connected with the control device;
the power device is used for providing power for wire crimping;
the crimping device is used for conducting wire crimping operation;
and the measuring device is used for measuring the resistance of the wire crimping part and the opposite side distance of the wire section in the crimping process in real time and transmitting data to the control device.
The control device comprises a PLC control system, a communication module and a measurement host;
the PLC control system is used for controlling the operation of the hydraulic machine;
The communication module is used for connecting external electronic equipment and controlling the hydraulic press after connection;
The measuring host is used for collecting and processing the data of the contact resistance of the crimping position of the splicing sleeve and the distance L0 between the opposite sides of the section of the wire of the crimping position of the splicing sleeve, which are measured by the measuring device.
The power device comprises a hydraulic oil tank and a hydraulic motor, and the hydraulic oil tank is connected with the hydraulic motor.
The crimping device comprises a supporting mechanism and a crimping module; the supporting mechanisms are used for fixing the splicing sleeve in the crimping process, are installed on the frame in pairs and are symmetrically located on two sides of the base respectively.
The supporting mechanism comprises a limiting frame, a bottom plate, a longitudinal rod and a transverse rod; the crimping module comprises an upper pressing die and a lower pressing die;
The limiting frames are movably arranged on the bottom plate, and the distance between the limiting frames can be adjusted to the diameter of the wire, so that the longitudinal center line of the crimping module is aligned with the center line of the wire; the longitudinal rods and the transverse rods are telescopic rods, so that the bottom plate and the lower pressing die keep the same height. The measuring device comprises a direct current resistance measuring module, wherein the direct current resistance measuring module adopts a Kelvin bridge method to measure the contact resistance at the crimping part of the splicing sleeve, and the direct current resistance measuring device comprises a current electrode and a voltage electrode; the current electrodes and the voltage electrodes are arranged on the side edges of the frame in pairs and are symmetrically positioned on two sides of the crimping module respectively.
The measuring device comprises an electromagnetic ranging module, wherein the electromagnetic ranging module is used for measuring the opposite side distance of a crimping part of the splicing sleeve, the electromagnetic ranging module is installed on the side edge of the frame in pairs, and in the crimping process, the electromagnetic ranging module measures the change of the opposite side distance L0 of the section of the lead and transmits data to a measuring host.
The invention relates to a wire connection intelligent hydraulic machine based on contact resistance, which has the following technical effects:
The pressure and the speed of the hydraulic press are controlled by monitoring the opposite side distance L0 of the section of the wire and the resistance of the splicing sleeve in real time, so that on one hand, the pressure effect of the splicing sleeve is improved, and the problem of uneven resistance of the splicing sleeve caused by low pressure accuracy in manual pressure welding is well solved. On the other hand, the problem that the manual holding connecting tube is easy to cause overlarge bending is solved, the bending of the connecting tube is ensured to be in an allowable range, and errors caused by human factors in the crimping process are reduced.
Drawings
FIG. 1 is a functional block diagram of an intelligent hydraulic machine according to the present invention.
Fig. 2 is a schematic structural diagram of the intelligent hydraulic machine of the present invention.
Fig. 3 is a schematic diagram of the crimping device of the intelligent hydraulic machine.
Fig. 4 is a schematic structural diagram of a direct current resistance measurement module of the intelligent hydraulic machine.
FIG. 5 is a schematic diagram of an electromagnetic ranging module of the intelligent hydraulic machine of the present invention;
wherein: l0-the distance between opposite sides of the section of the wire, M-the section of the wire and the section of the splicing sleeve.
Detailed Description
As shown in fig. 1 to 5, the intelligent hydraulic machine for wire connection based on contact resistance comprises a control device 1, a power device 2, a crimping device 3 and a measuring device 4.
The control device 1 is connected with the power device 2, the power device 2 is connected with the crimping device 3, and the measuring device 4 is connected with the control device 1;
the power device 2 is used for providing power for wire crimping;
A crimping device 3 for wire crimping operation;
And the measuring device 4 is used for measuring the resistance of the wire crimping part and the opposite side distance L0 of the wire cross section in the crimping process in real time and transmitting data to the control device 1.
The control device 1 comprises a PLC control system 11, a communication module 12 and a measurement host 13;
the PLC control system 11 is used for controlling the operation of the hydraulic machine;
the communication module 12, including bluetooth, wiFi, etc. functions, is used for connecting external electronic equipment, and can control the hydraulic press after the connection.
And the measuring host 13 is used for collecting and processing the contact resistance of the crimping part of the splicing sleeve and the size data of the opposite side distance L0 of the section of the wire of the crimping part of the splicing sleeve, which are measured by the measuring device 4.
The control device 1 comprises a liquid crystal display screen which is a friendly 4.3 inch industrial liquid crystal panel G043FTN01.0.
The communication module 12 employs an OBDII-180 bluetooth fitting connector WG-CR18116018.
The measurement host 13 includes a TSSOP-28ADC data acquisition analog-to-digital converter.
The power device 2 comprises a hydraulic oil tank 21 and a hydraulic motor 22, and the hydraulic oil tank 21 is connected with the hydraulic motor 22. The hydraulic oil tank 21 is connected with the crimping module 32 in the crimping device 3 through a high-pressure rubber tube to provide power for the crimping module 32.
As shown in fig. 3, the crimping device 3 comprises a supporting mechanism 31 and a crimping module 32; the supporting mechanism 31 is used for fixing the splicing sleeve in the crimping process, replaces a worker to hold the splicing sleeve, and reduces the problem that the bending degree of the splicing sleeve body caused by manual instability does not reach the standard. The supporting mechanisms 31 are installed on the frame 5 in pairs and are symmetrically located on two sides of the base 6 respectively.
The supporting mechanism 31 comprises a limiting frame 310, a bottom plate 311, a longitudinal rod 312 and a transverse rod 313; the crimping module 32 includes an upper die 321, a lower die 322. The lower pressing die 322 is embedded on the base 6; the upper pressing die 321 is embedded on the frame 5 and is positioned right above the lower pressing die 321;
Defining a shelf 310, a floor 311, a longitudinal bar 312, a transverse bar 313; one end of the transverse rod 313 is fixed on the frame 5 and is positioned below the base 6; one end of the longitudinal rod 312 is vertically and fixedly connected with the other end of the transverse rod 313; the other end of the longitudinal rod 312 is fixedly connected with the bottom plate 311; the longitudinal bars 312 and the transverse bars 313 are steel telescopic bars; the limiting frame 310 is movably mounted on the bottom plate 311; the limiting frame 310 and the bottom plate 311 are both made of steel; to facilitate the passage of the wire through the crimping module 32 and to better ensure the stability of the wire during crimping, the length of the longitudinal bars 312, the transverse bars 313 are adjusted so that the bottom plate 311 is the same height as the lower die 322, and the limiting frame 310 is adjusted to the wire diameter width.
The limiting brackets 310 are movably mounted on the bottom plate 311, and the distance between the limiting brackets 310 can be adjusted to the diameter of the wire so that the longitudinal center line of the crimping position of the crimping module 32 is aligned with the center line of the wire, and the limiting brackets are used for limiting the horizontal bending of the splicing sleeve in the crimping process.
The longitudinal bars 312 and the transverse bars 313 are telescopic bars, so that the bottom plate 311 and the lower pressing die 322 keep the same height, and the vertical bending of the splicing sleeve is limited in the crimping process.
The upper and lower modules are made of solid chrome steel, the shape of the die can be regular hexagon and the like, and the hydraulic oil tank 21 is connected with the compression joint module 32 in the compression joint device 3 through a high-pressure rubber tube to provide power for the compression joint module.
As shown in fig. 4, the measuring device 4 includes a dc resistance measuring module 41, the dc resistance measuring module 41 measures the contact resistance at the crimping position of the splicing sleeve by using kelvin bridge method, and the dc resistance measuring device 41 includes a current electrode 411 and a voltage electrode 412; the current electrodes 411 and the voltage electrodes 412 are arranged on the side edges of the frame 5 in pairs, and are symmetrically positioned on two sides of the crimping module 32 respectively. The direct current resistance measurement module 41 adopts a Shanghai Zhengyang QJ84A direct current low resistance tester.
As shown in fig. 5, the measuring device 4 includes an electromagnetic ranging module 42, where the electromagnetic ranging module 42 is used to measure the distance between opposite sides of the crimping portion of the splicing sleeve, and is installed on the side of the frame 5 in pairs, the crimping module 32 is in a regular hexagon shape, and the initial cross sections of the wire and the splicing sleeve are circular. During crimping, the electromagnetic ranging module 42 measures the change in the wire cross section to edge distance L0 and transmits the data to the measurement host 13. The electromagnetic ranging module 42 employs a ranging sensor ORA1L02.
Preparation work before crimping operation: after the hydraulic machine idle load experiment, wire drawing and printing, splicing sleeve cleaning and pipe passing are completed, the control device 1 sets the reference value (maximum allowable value) of the opposite side distance L0 of the splicing sleeve crimping part as S, and mainly sets the reference value according to SDJ 226-87 'overhead power transmission line wire and lightning conductor hydraulic construction technical regulations'; and the resistance reference value R is set, wherein the set resistance reference value R is smaller than the resistance of the lead. Crimp completion conditions:
1) The opposite side distance of the crimping part of the splicing sleeve is smaller than S;
2) The contact resistance of the crimping part of the splicing sleeve is equal to R or the error does not exceed a certain precision, and the splicing sleeve can be automatically set by the control device 1).
Both conditions must be met at the same time.
After the intelligent hydraulic press is used for completing crimping of the splicing sleeve, the splicing sleeve meets the opposite side requirement in the specification and has uniform resistance distribution, so that crimping quality and precision are improved, and crimping errors caused by nonstandard manual operation are reduced.
Taking the hydraulic operation of aluminum splicing sleeve in crimping steel-cored aluminum stranded wire (LGJ-240/40) and linear splicing sleeve (JYD-240/40) as an example:
When the preparation work (no-load experiment of the hydraulic press, wire drawing and printing, cleaning of the splicing sleeve and pipe penetrating) before the crimping operation is completed and the steel pipe splicing operation is completed, the control device 1 sets the reference value (maximum allowable value) of the opposite side distance of the crimping position of the aluminum splicing sleeve to be S=31.34 mm, and sets the reference value R=0.1Ω < 0.131 Ω of the wire resistance. After the aluminum splicing sleeve is fixed by the fixing device, the control device 1 controls the hydraulic machine to start to operate, and the pressure value of the hydraulic machine is set to be 70MPa. In the crimping process, the opposite side distance reaches the requirement within 3-5s, the continuous resistor does not reach the resistance reference value, the crimping is continued until the actual contact resistance value is equal to the resistance reference value, and the crimping is stopped. After the crimping of the whole splicing sleeve is finished, the splicing sleeve meets the opposite side requirement in the specification and has uniform resistance distribution.
Claims (6)
1. Wire connection intelligent hydraulic press based on contact resistance, characterized by including:
A control device (1), a power device (2), a crimping device (3) and a measuring device (4);
The control device (1) is connected with the power device (2), the power device (2) is connected with the crimping device (3), and the measuring device (4) is connected with the control device (1);
The power device (2) is used for providing power for wire crimping;
A crimping device (3) for wire crimping operation;
the measuring device (4) is used for measuring the resistance of the wire crimping part and the opposite side distance of the wire cross section in real time in the crimping process and transmitting data to the control device (1);
The measuring device (4) comprises an electromagnetic ranging module (42), wherein the electromagnetic ranging module (42) is used for measuring the opposite side distance of a crimping part of the splicing sleeve, the electromagnetic ranging module (42) is arranged on the side edge of the frame (5) in pairs, and in the crimping process, the electromagnetic ranging module (42) measures the change of the opposite side distance L0 of the section of the lead and transmits data to the measuring host (13);
Preparation work before crimping operation: the control device (1) sets the reference value of the opposite side distance L0 of the crimping part of the continuous pipe as S, and sets the resistance reference value R, wherein the set resistance reference value R is smaller than the resistance of the lead; crimp completion conditions:
1) The opposite side distance of the crimping part of the splicing sleeve is smaller than S;
2) The contact resistance of the crimping part of the splicing sleeve is equal to R or the error does not exceed a certain precision;
Both conditions must be met at the same time.
2. The intelligent hydraulic machine for wire connection based on contact resistance according to claim 1, characterized in that: the control device (1) comprises a PLC control system (11), a communication module (12) and a measurement host (13);
the PLC control system (11) is used for controlling the operation of the hydraulic machine;
the communication module (12) is used for connecting external electronic equipment and can control the hydraulic press after being connected;
And the measuring host (13) is used for collecting and processing the contact resistance of the crimping part of the splicing sleeve and the size data of the opposite side distance L0 of the section of the wire of the crimping part of the splicing sleeve, which are measured by the measuring device (4).
3. The intelligent hydraulic machine for wire connection based on contact resistance according to claim 1, characterized in that: the power device (2) comprises a hydraulic oil tank (21) and a hydraulic motor (22), and the hydraulic oil tank (21) is connected with the hydraulic motor (22).
4. The intelligent hydraulic machine for wire connection based on contact resistance according to claim 3, characterized in that: the crimping device (3) comprises a supporting mechanism (31) and a crimping module (32); the supporting mechanisms (31) are used for fixing the splicing sleeve in the crimping process, and the supporting mechanisms (31) are installed on the frame (5) in pairs and are symmetrically located on two sides of the base (6) respectively.
5. The intelligent hydraulic machine for wire connection based on contact resistance according to claim 4, wherein: the supporting mechanism (31) comprises a limiting frame (310), a bottom plate (311), a longitudinal rod (312) and a transverse rod (313); the crimping module (32) comprises an upper pressing die (321) and a lower pressing die (322);
the limiting frames (310) are movably arranged on the bottom plate (311), and the distance between the limiting frames (310) can be adjusted to the diameter of the wire, so that the longitudinal center line of the crimping module (32) is aligned with the center line of the wire;
The longitudinal rods (312) and the transverse rods (313) are telescopic rods, so that the bottom plate (311) and the lower pressing die (322) are kept at the same height.
6. The intelligent hydraulic machine for wire connection based on contact resistance according to claim 4, wherein: the measuring device (4) comprises a direct current resistance measuring module (41), the direct current resistance measuring module (41) adopts a Kelvin bridge method to measure contact resistance at the crimping part of the splicing sleeve, and the direct current resistance measuring module (41) comprises a current electrode (411) and a voltage electrode (412); the current electrodes (411) and the voltage electrodes (412) are arranged on the side edges of the frame (5) in pairs and are symmetrically arranged on the two sides of the base (6) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111199517.4A CN113948935B (en) | 2021-10-14 | 2021-10-14 | Intelligent hydraulic machine for wire connection based on contact resistance |
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| CN202111199517.4A CN113948935B (en) | 2021-10-14 | 2021-10-14 | Intelligent hydraulic machine for wire connection based on contact resistance |
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| CN113948935A CN113948935A (en) | 2022-01-18 |
| CN113948935B true CN113948935B (en) | 2024-08-06 |
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| JP3019749B2 (en) * | 1995-07-04 | 2000-03-13 | 住友電装株式会社 | Measurement method of contact resistance and evaluation method of caulking crimping structure |
| US8914961B2 (en) * | 2012-02-29 | 2014-12-23 | GM Global Technology Operations LLC | Methods and systems for measuring crimp quality |
| BR112016028987B1 (en) * | 2014-06-11 | 2022-06-21 | Pkc Wiring Systems Oy | Sensor arrangement for measuring a crimp connection, measuring equipment for a crimp connection and method for measuring a crimp connection |
| CN106099607B (en) * | 2016-08-02 | 2018-05-15 | 吉林省送变电工程公司 | A kind of intelligence crimping platform suitable for high voltage electricity transmission conductive wire |
| CN108923218A (en) * | 2018-06-21 | 2018-11-30 | 广东电网有限责任公司 | Compression bonding method |
| CN113258399B (en) * | 2021-07-14 | 2021-11-30 | 南方电网科学研究院有限责任公司 | Wire crimping device and method |
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2021
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086505A (en) * | 2017-04-28 | 2017-08-22 | 国网山东省电力公司电力科学研究院 | An intelligent crimping system and method for UHV transmission and transformation wires |
| CN108872707A (en) * | 2018-04-28 | 2018-11-23 | 国网山东省电力公司电力科学研究院 | A kind of electric wire and cable conductor D.C. resistance aided measurement device and measurement method |
| CN112421335A (en) * | 2020-10-21 | 2021-02-26 | 河南兰兴电力机械有限公司 | A kind of automatic crimping machine for transmission and transformation power line wires and using method thereof |
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