CN219871548U - Contact network electric connecting wire clamp contact resistance measuring device and system - Google Patents
Contact network electric connecting wire clamp contact resistance measuring device and system Download PDFInfo
- Publication number
- CN219871548U CN219871548U CN202320151002.5U CN202320151002U CN219871548U CN 219871548 U CN219871548 U CN 219871548U CN 202320151002 U CN202320151002 U CN 202320151002U CN 219871548 U CN219871548 U CN 219871548U
- Authority
- CN
- China
- Prior art keywords
- contact
- contact resistance
- constant current
- connecting wire
- wire clamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005259 measurement Methods 0.000 claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000012360 testing method Methods 0.000 abstract description 27
- 238000000034 method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000003137 locomotive effect Effects 0.000 description 5
- 230000001939 inductive effect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model provides a contact resistance measuring device and system of an electric connecting wire clamp of a contact net, relates to the field of resistance measurement, and is applied to the measurement of contact resistance by adopting the contact net connecting wire clamp to be arranged on the contact net. The method specifically comprises the following steps: the device comprises a main control circuit, a protection circuit, a constant current output unit, a measurement circuit and a digital display screen; the main control circuit and the protection circuit are used for controlling the constant current output unit to provide a constant current power supply for the device and outputting constant current voltage to the contact resistor according to the constant current power supply; the measuring circuit is used for collecting voltage signals at the contact resistor end, collecting output current signals at the constant current output end, and transmitting the voltage signals and the output current signals to the main control circuit for voltage/current conversion and digital processing to obtain a measuring result; the digital display screen is used for displaying the measurement result. The utility model achieves the effects of saving test cost and improving test efficiency by simplifying test steps.
Description
Technical Field
The utility model relates to the field of resistance measurement, and is applied to a device and a system for measuring contact resistance of an electric connecting wire clamp of a contact network by adopting the connecting wire clamp of the contact network to be arranged on the contact network.
Background
The main function of the catenary is to transfer electrical energy from the traction substation to the electric locomotives running along the electrified railway. However, due to the fact that the contact net electric connecting wire clamps run for a long time, weather changes, current passes and other factors cause electric or chemical corrosion, the impedance of electric connection is increased, the situation that the diversion of a main electric conduction loop is not smooth is caused, and therefore normal operation of an electric locomotive is affected, and even accidents are caused. Therefore, the testing of the contact network electrical connection clamps is particularly important.
At present, a direct current resistance tester of a transformer or other inductive devices is mainly adopted for testing the electric connecting wire clamps of the overhead contact system, and the output power of the direct current resistance tester is larger, so that the volume and the weight are relatively larger. And the contact net electric connecting wire clamp is arranged on the contact net, and meanwhile, the contact resistance test belongs to overhead operation, so that alternating current power supply and inconvenience are adopted, moreover, the common direct current resistance tester is large in volume and weight, and is inconvenient to operate, and the timeliness of the test is greatly reduced.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a contact resistance measuring device and a contact resistance measuring system for an electric connecting wire clamp of a contact network aiming at the defects in the prior art.
The technical scheme adopted for solving the technical problems is as follows:
according to an aspect of an embodiment of the present utility model, there is provided a contact electrical connection clip contact resistance measurement device for a contact network, including:
the device comprises a main control circuit, a protection circuit, a constant current output unit, a measurement circuit and a digital display screen;
the main control circuit and the protection circuit are used for controlling the constant current output unit to provide a constant current power supply for the contact resistance measuring device of the contact net electric connecting wire clamp, and outputting constant current voltage to the contact resistance according to the constant current power supply;
the measuring circuit is used for collecting voltage signals at the contact resistor end, collecting output current signals at the constant current output end, and transmitting the voltage signals and the output current signals to the main control circuit for voltage/current conversion and digital processing to obtain a measuring result;
and the digital display screen is used for displaying the measurement result.
According to another aspect of an embodiment of the present utility model, the main control circuit further includes:
the main control circuit is used for controlling the measurement to start, stop, forward and reverse operation, and fast and slow operation.
According to another aspect of the embodiment of the present utility model, the protection circuit further includes:
the protection circuit is used for ensuring that power supply in the electric connection clamp contact resistance tester can safely and reliably run, and comprises overcurrent protection, overvoltage protection and overheat protection.
According to another aspect of the embodiment of the present utility model, the contact resistance is equal to or smaller than the equal-length thread resistance, wherein when threads of different types are connected, the smallest thread resistance is used as a basis for judgment.
According to another aspect of the embodiment of the present utility model, the contact network electrical connection clip contact resistance measurement device further includes:
a contact resistance, a current input terminal and a voltage measurement terminal;
wherein CD is the contact resistance for resistance measurement;
the AB end is the current input end, the A end is the positive electrode, the B end is the negative electrode, and the AB end is used for measuring the output current signal of the output end;
the CD end is the voltage measuring end, the C port is the positive electrode, the D port is the negative electrode, and the voltage measuring circuit is used for collecting voltage signals at the contact resistance end.
According to an aspect of an embodiment of the present utility model, there is provided a contact electrical connection clamp contact resistance measurement system for a contact network, which is characterized by including any one of the contact electrical connection clamp contact resistance measurement device and a power transmission line;
one end of the power transmission line is connected with the contact resistance measuring device interface of the contact net electric connecting wire clamp, and the other end of the power transmission line is connected with a direct current power supply;
the direct current power supply is used for providing direct current power for the contact resistance measuring device of the contact net electric connecting wire clamp.
The utility model adopts the technical proposal and has at least the following beneficial effects:
when the traditional high-power direct-current resistance tester is applied to the test project, the conditions of heavy instrument and inconvenient power supply requirement can occur, and the electric connecting wire clamp contact resistance tester used in the utility model adopts a lithium battery to supply power, so that the test duration is ensured to be 8 hours, the normal detection requirement can be met, the instrument volume is smaller, and the weight is lighter; meanwhile, the tester ensures the testing precision and simplifies the functions on the basis of the direct current resistance tester of the inductive equipment, the testing is started by one key, the testing data is stably displayed in 3 seconds, the resolution reaches 1 mu omega, the testing requirement is met, and the contact resistance testing operation of the contact network electric connecting wire clamp is simpler.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a device for measuring contact resistance of an electrical connecting clamp of a contact network according to an embodiment of the present utility model;
fig. 2 is a working schematic diagram of a contact network electric connection clamp contact resistance measuring device according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a system for measuring contact resistance of an electrical contact clip of a contact network according to an embodiment of the present utility model;
fig. 4 is a schematic device diagram of a contact electrical connection clamp contact resistance measuring device of the contact network according to an embodiment of the present utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.
The terms "first," "second," "third," "fourth," and the like in this disclosure are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion, such as a series of steps or elements. The method, system, article, or apparatus is not necessarily limited to those explicitly listed but may include other steps or elements not explicitly listed or inherent to such process, method, article, or apparatus.
The main function of the catenary is to transfer electrical energy from the traction substation to the electric locomotives running along the electrified railway. In order to ensure the realization of the function of the contact net, a series of contact net structures are designed. The main conductive circuit of the contact net is an electric path consisting of a feeder line, a disconnecting switch, an opening Guan Yinxian, a contact line and an electric connecting clamp. The main conductive loop portions are connected by various clamps. So that the loop extends along the railway to meet the requirement of supplying power to the electric locomotive. The clamps and the connected parts thereof are electrical connections of the main conductive loop, which should also be provided with the requirements of the main conductive loop, i.e. allow the same current to pass through as the connected wires. Therefore, the electrical connections in the main conductive loop must be well connected to ensure the main conductive loop is clear.
Meanwhile, due to electric or chemical corrosion caused by long-time operation, climate change, current passing and the like, the impedance of the electric connection wire clamp is increased, so that the diversion of the main conductive loop is not smooth. Thereby affecting the normal operation of the electric locomotive and even causing accidents. Therefore, the testing of the contact network electrical connection clamps is particularly important.
However, at present, a direct current resistance tester of a transformer or other inductive devices is mainly adopted for testing the electric connecting wire clamp of the contact network, and because the output power of the direct current resistance tester is larger, the volume and the weight of the direct current resistance tester are relatively larger, and most of the direct current resistance tester is supplied with 220V alternating current power. The contact net electric connecting wire clamp is arranged on the contact net, and the test contact resistance belongs to high-altitude operation, so that alternating current power supply and inconvenience are adopted, moreover, the common direct current resistance tester is large in volume and weight, and is extremely inconvenient to operate, and the timeliness of the test is greatly reduced.
To this disclosed embodiment provides a contact net electric connection clamp contact resistance measuring device, can be more light easy operation contact net special electric connection clamp contact resistance measuring device, as shown in fig. 1, include:
the device comprises a main control circuit, a protection circuit, a constant current output unit, a measurement circuit and a digital display screen;
the main control circuit and the protection circuit are used for controlling the constant current output unit to provide a constant current power supply for the contact resistance measuring device of the contact net electric connecting wire clamp, and outputting constant current voltage to the contact resistance according to the constant current power supply;
the measuring circuit is used for collecting voltage signals at the contact resistor end, collecting output current signals at the constant current output end, and transmitting the voltage signals and the output current signals to the main control circuit for voltage/current conversion and digital processing to obtain a measuring result;
and the digital display screen is used for displaying the measurement result.
In summary, the contact resistance measurement system for the contact network electric connecting wire clamp provided by the embodiment of the disclosure achieves the purposes of lighter contact resistance test of the contact network electric connecting wire clamp and simpler contact resistance test operation of the contact network electric connecting wire clamp, and achieves the effects of simplifying test steps, saving test cost and improving test efficiency.
The schematic diagram of the electrical connection clamp contact resistance testing device in the contact network electrical connection clamp contact resistance measuring method is shown in fig. 2, and the electrical connection clamp contact resistance testing device comprises:
the direct current 12V power supply provides a direct current power supply for the contact resistance testing device of the special electric connecting wire clamp of the contact net, the constant current output unit provides a constant current power supply for the instrument under the control of the main control circuit and the protection circuit, the constant current power supply is output to the contact resistance, the measurement circuit collects voltage signals at the tested object end, meanwhile collects output current signals of the constant current output end, the data are sent to the main control circuit, and the data are displayed through the liquid crystal screen after alternating current/direct current conversion and digital processing.
In a possible embodiment, the main control circuit in the contact network electric connection clamp contact resistance measuring device further includes:
the main control circuit is used for controlling the measurement to start, stop, forward and reverse operation, and fast and slow operation.
In a possible embodiment, the protection circuit in the contact network electric connection clamp contact resistance measurement device further includes:
the protection circuit is used for ensuring that power supply in the electric connecting wire clamp contact resistance tester can safely and reliably run, and comprises overcurrent protection, overvoltage protection and overheat protection.
In a possible embodiment, the contact resistance includes:
the contact resistance is smaller than or equal to the equivalent thread resistance, wherein when threads of different types are connected, the minimum thread resistance is used as a judgment basis;
the initial resistance value of each part in the electric connection clamp contact resistance tester should not exceed 30% of the average value of parts of the same manufacturer.
In a possible embodiment, the contact network electric connection clamp contact resistance measuring device further includes:
wherein CD is contact resistance;
the AB end is a current input end, wherein an A port is a positive electrode, and a B port is a negative electrode, and is used for measuring an output current signal of the output end;
the CD end is a voltage measuring end, the C port is an anode, the D port is a cathode, and the voltage measuring end is used for collecting voltage signals at the contact resistance end by the measuring circuit.
According to an aspect of the embodiment of the present utility model, there is provided a contact electrical connection clamp contact resistance measurement system of a contact network, where a connection schematic diagram of the contact electrical connection clamp contact resistance measurement system of the contact network is shown in fig. 3, and the contact electrical connection clamp contact resistance measurement device of the contact network and a power transmission line include any one of the above-mentioned embodiments;
one end of the power transmission line is connected with the contact resistance measuring device interface of the contact net electric connecting wire clamp, and the other end of the power transmission line is connected with a direct current power supply;
the direct current power supply is used for providing direct current power for the contact resistance measuring device of the contact net electric connecting wire clamp.
The high-power direct current resistance tester at the present stage is applied to the test project, the instrument is heavy, and the power supply requirement is inconvenient at present.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present utility model may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution disclosed in the present utility model can be achieved, and the present utility model is not limited herein.
The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.
Claims (6)
1. The utility model provides a contact net electric connection fastener contact resistance measuring device which characterized in that includes:
the device comprises a main control circuit, a protection circuit, a constant current output unit, a measurement circuit and a digital display screen;
the main control circuit and the protection circuit are used for controlling the constant current output unit to provide a constant current power supply for the contact resistance measuring device of the contact net electric connecting wire clamp, and outputting constant current voltage to the contact resistance according to the constant current power supply;
the measuring circuit is used for collecting voltage signals at the contact resistor end, collecting output current signals at the constant current output end, and transmitting the voltage signals and the output current signals to the main control circuit for voltage/current conversion and digital processing to obtain a measuring result;
and the digital display screen is used for displaying the measurement result.
2. The apparatus of claim 1, wherein the main control circuit further comprises:
the main control circuit is used for controlling the measurement to start, stop, forward and reverse operation, and fast and slow operation.
3. The apparatus of claim 1, wherein the protection circuit further comprises:
the protection circuit is used for ensuring that power supply in the electric connection clamp contact resistance tester can safely and reliably run, and comprises overcurrent protection, overvoltage protection and overheat protection.
4. The apparatus of claim 1, wherein the contact resistance is equal to or less than the equivalent thread resistance, wherein the minimum thread resistance is based upon the determination when threads of different types are connected.
5. The device according to claim 1, wherein the contact network electrical connection clip contact resistance measuring device further comprises:
a contact resistance, a current input terminal and a voltage measurement terminal;
wherein CD is the contact resistance for resistance measurement;
the AB end is the current input end, the A end is the positive electrode, the B end is the negative electrode, and the AB end is used for measuring the output current signal of the output end;
the CD end is the voltage measuring end, the C port is the positive electrode, the D port is the negative electrode, and the voltage measuring circuit is used for collecting voltage signals at the contact resistance end.
6. A contact network electric connecting wire clamp contact resistance measuring system, which is characterized by comprising the contact network electric connecting wire clamp contact resistance measuring device and a power transmission line according to any one of claims 1-5;
one end of the power transmission line is connected with the contact resistance measuring device interface of the contact net electric connecting wire clamp, and the other end of the power transmission line is connected with a direct current power supply;
the direct current power supply is used for providing direct current power for the contact resistance measuring device of the contact net electric connecting wire clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320151002.5U CN219871548U (en) | 2023-02-06 | 2023-02-06 | Contact network electric connecting wire clamp contact resistance measuring device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320151002.5U CN219871548U (en) | 2023-02-06 | 2023-02-06 | Contact network electric connecting wire clamp contact resistance measuring device and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219871548U true CN219871548U (en) | 2023-10-20 |
Family
ID=88324521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320151002.5U Active CN219871548U (en) | 2023-02-06 | 2023-02-06 | Contact network electric connecting wire clamp contact resistance measuring device and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219871548U (en) |
-
2023
- 2023-02-06 CN CN202320151002.5U patent/CN219871548U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201589815U (en) | Resistance test device | |
| CN212646868U (en) | Electrified detection device of cable metal sheath electrical connection defect | |
| CN219871548U (en) | Contact network electric connecting wire clamp contact resistance measuring device and system | |
| CN205210232U (en) | Low pressure intelligence fault detector | |
| CN204479671U (en) | A kind of DC converter station direct current arrester electrification detection system | |
| CN217587553U (en) | Power supply bus detection protection circuit | |
| CN203433077U (en) | Fault indicator of distribution network | |
| CN216900870U (en) | Fault indicator based on zero sequence voltage starting | |
| CN109633426A (en) | Switch detection method | |
| CN212433275U (en) | Live detection system for single-ended grounding loop resistor of cable | |
| CN200976496Y (en) | AC power switch apparatus | |
| CN211263720U (en) | Double-clamp-meter type direct current grounding searching instrument | |
| CN115963372A (en) | IGBT double-pulse testing device and method for power circuit | |
| CN209264903U (en) | A kind of insulation detecting circuit module and a kind of automatic alarm circuit | |
| CN207516486U (en) | A kind of device for reducing the secondary cable core verification time | |
| CN207181660U (en) | A kind of battery charge monitor testboard | |
| CN112162163A (en) | Novel high-voltage direct-current capacitor large-current testing device | |
| CN201601464U (en) | Combined switch controller | |
| CN203405515U (en) | Chopping test system for converter power unit | |
| CN203587755U (en) | IGBT online detection circuit for alternating-current chopper bridge | |
| CN220553662U (en) | Intelligent socket with fault early warning function | |
| CN103472359A (en) | Distribution system fault indicator | |
| CN219496518U (en) | Zero-crossing detection circuit and device | |
| CN209105048U (en) | A kind of Rectification Power Factor system for rail traffic progress traction power supply | |
| CN217717948U (en) | High-power rectifier bridge arm signal detection box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |