CN208921816U - A kind of earth-return circuit continuity test system - Google Patents

Abstract

The utility model discloses a kind of earth-return circuit continuity test systems, are applied to earth mat testing field.The system includes continuity test instrument and controlling terminal, the continuity test instrument includes the first controller, test device and the first wireless communication module, first wireless communication module, test device are connect with the first controller, the test device is connect with the first down conductor, the second down conductor respectively, and controlling terminal includes second controller and the second wireless communication module for connecting with the second controller；Second wireless communication module is used to send test indication signal to the first wireless communication module.By the earth-return circuit continuity test system in the utility model, without being linked up by mobile phone or intercom between test job personnel, clamp personnel directly long-range control test process after clamp is improved work efficiency.

Description

A kind of earth-return circuit continuity test system

Technical field

The utility model relates to earth mat testing fields, in particular to a kind of earth-return circuit continuity test system.

Background technique

The electrical integrity of earthing or grounding means, which refers in earthing or grounding means, should be grounded between various electrical equipments, earthing or grounding means Each section and the electrical connectivity between each equipment, i.e. DC resistance, also referred to as electrically conducting.The ground connection of power equipment Reliable, the effective connection of downlead and earth mat is the basic guarantee of equipment safety operation.Down conductor is power equipment and ground The coupling part of net, during the long-play of power equipment, junction is possible to influence because of factors such as dampness, saves Phenomena such as point is corroded, is even broken causes down conductor and grounded screen tie point resistance to increase, to not be able to satisfy electric power rule The requirement of journey, makes equipment there is hidden danger in operation, will cause the operation of equipment lost territory, also, earthing or grounding means when serious Underground earthing pole and its coupling part corrosion, even phenomenon of rupture may also occur.Therefore, electricity periodically is carried out to earthing or grounding means Gas integrity test is necessary.

To earthing or grounding means carry out electrical integrity test namely test earth mat conducting resistance, be it is a kind of scene repeat, Cumbersome test needs two staff to draw the p-wire on both sides respectively, and clip at this stage when detecting, by tester Device operates test by third staff, for the substation that 220KV and 500KV take up a large area, live clamp personnel with It is inconvenient that instrument operator is linked up, and generally requires mobile phone or intercom is linked up, working efficiency is low.

Utility model content

The purpose of this utility model is to provide a kind of earth-return circuit continuity test systems, can be improved testing efficiency.

The utility model provides a kind of earth-return circuit continuity test system, including continuity test instrument and controlling terminal, institute State continuity test instrument include the first controller, test device and the first wireless communication module, first wireless communication module, The test device is connect with first controller, and the test device is grounded with the first down conductor, second respectively Downlead connection, the controlling terminal include second controller and the second radio communication mold for connecting with the second controller Block；Second wireless communication module is used to send test indication signal to first wireless communication module.

Optionally, the test device includes constant-current source and voltage acquisition apparatus, and the constant-current source, the voltage obtain Device is connect with first controller respectively, the voltage acquisition apparatus for obtain first down conductor with it is described Voltage value between second down conductor.

Optionally, the continuity test instrument further includes the first current terminal, the second current terminal, first voltage wiring The first end of end and second voltage terminals, the constant-current source passes through first current terminal and first grounding lead The second end of offline connection, the constant-current source is connect by second current terminal with second down conductor, institute The first end for stating voltage acquisition apparatus is connect by the first voltage terminals with first down conductor, the voltage The second end of acquisition device is connect by the second voltage terminals with second down conductor.

Optionally, the continuity test instrument is also used to send conduction resistance value, the controlling terminal to the controlling terminal Including storage unit and display screen, the storage unit, the display screen are connect with the second controller, the display Shield the conduction resistance value transmitted for showing the second controller.

Optionally, the controlling terminal further includes the USB interface connecting with the storage unit, so that the controlling terminal The conduction resistance value saved in the storage unit is exported in the external equipment connecting with the USB interface.

Optionally, the controlling terminal further includes test switch, and the test switch is connected with the second controller, with The second controller is set to pass through second wireless communication module when the test closes the switch to the continuity test instrument Send test indication signal.

Optionally, first wireless communication module is communicated by first antenna with the controlling terminal, and the conducting is surveyed Trying instrument further includes first antenna interface, and the first antenna can be inserted by the first antenna interface from the continuity test instrument Or it removes.

Optionally, second wireless communication module is communicated by the second antenna with the continuity test instrument, the control Terminal further includes the second antennal interface, second antenna by second antennal interface can from the controlling terminal be inserted into or It removes.

Optionally, the controlling terminal further includes power module and power interface, and the power module includes battery, For powering for the controlling terminal, the power module can be charged by the power interface from external power supply.

Optionally, the controlling terminal further includes battery capacity indication lamp, and the battery capacity indication lamp is connect with the power module, It is used to indicate the remaining capacity of the power module.

Compared with prior art, by earth-return circuit continuity test system provided by the utility model, staff can will be led Logical tester and one of down conductor connect with continuity test instrument immobilize, hold controlling terminal and with lead The connection clamp of logical tester connection, changes connection clamp and connects from different down conductors, is confirming connection clamp and is connecing When downlead contact in ground is good, test indication signal is remotely sent to conducting tester by controlling terminal, so that continuity test Instrument tests the conduction resistance value between two down conductors at this time, which wirelessly realizes continuity test instrument It solves live clamp personnel and instrument in the prior art for the substation taken up a large area with the connection of controlling terminal and grasps Make personnel and link up inconvenient problem, improves work efficiency.

To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, alternative embodiment is cited below particularly, and Cooperate appended attached drawing, is described in detail below.

Detailed description of the invention

It, below will be to required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment The attached drawing used is briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore not It should be considered as the restriction to range, for those of ordinary skill in the art, without creative efforts, It can also be obtained according to these attached drawings other relevant attached drawings.

Fig. 1 shows the schematic diagram of earth-return circuit test macro provided by the utility model；

Fig. 2 shows the schematic diagrames of continuity test instrument in earth-return circuit test macro；

Fig. 3 shows the schematic diagram of controlling terminal in earth-return circuit test macro.

Icon:

Continuity test instrument -10；Controlling terminal -11；First controller -101；Test device -102；First radio communication mold Block -103；Second controller -111；Second wireless communication module -112；Constant-current source -1021；Voltage acquisition apparatus -1022；Display Screen -113；Second antennal interface -114；Battery capacity indication lamp -115.

Specific embodiment

Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear Chu is fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole realities Apply example.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be come with a variety of different configurations Arrangement and design.Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit below The range of claimed invention, but it is merely representative of the selected embodiment of the utility model.Based on the utility model Embodiment, those skilled in the art's every other embodiment obtained without making creative work, all Belong to the range of the utility model protection.

It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.

In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through It is indirectly connected, can be the connection inside two elements.

It is in the description of the present invention, it should also be noted that, herein, such as first and second or the like pass It is that term is only used to distinguish one entity or operation from another entity or operation, and not necessarily requires or secretly Show that there are any actual relationship or orders between these entities or operation.The terms "include", "comprise" or its What his variant is intended to non-exclusive inclusion, so that including the process, methods of a series of elements, article or setting Standby includes not only those elements, but also including other elements that are not explicitly listed, or further includes for this process, side Method, article or the intrinsic element of equipment.In the absence of more restrictions, limited by sentence "including a ..." Element, it is not excluded that there is also other identical elements in the process, method, article or apparatus that includes the element.It is right For those skilled in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.

With reference to the accompanying drawing, it elaborates to some embodiments of the utility model.In the absence of conflict, under The feature in embodiment and embodiment stated can be combined with each other.

Grounded screen is made of vertically and horizontally earthing pole, for used in power plant, power transformation, having aerial drainage concurrently and pressing The horizontal mesh earthing or grounding means of effect, and being grounded is that metal between the position that power equipment should be grounded and underground earthing pole is led Body, also referred to as down conductor.Down conductor is the coupling part of power equipment and grounded screen, is transported for a long time in power equipment After row, junction, which is likely to occur corrosion, causes down conductor and grounded screen tie point resistance to increase, and present embodiments provides one Kind earth-return circuit continuity test system can pass through the conducting resistance between the first down conductor of test and the second down conductor Value judges the electrical integrity of power equipment earthing or grounding means.

Earth-return circuit continuity test system in the present embodiment, the down conductor and grounded screen that can be used for substation are led Logical test, can check the connection between power equipment down conductor and grounded screen, refering to fig. 1, which includes Continuity test instrument 10 and controlling terminal 11, continuity test instrument 10 include the first controller 101, test device 102 and first Wireless communication module 103, the first wireless communication module 103, test device 102 are connect with the first controller 101, test device 102 connect with the first down conductor, the second down conductor respectively, controlling terminal 11 include second controller 111 and with The second wireless communication module 112 that second controller 111 connects.

During actual test, a kind of optional embodiment be selected one be likely to connect with grounded screen it is good The down conductor of power equipment is reference point, around re-test the grounded part of electrical equipment and the down conductor of reference it Between conducting resistance be contemplated that replacement referred to connects if having that multiple equipment test result is bad when starting test Ground downlead；In the present embodiment, continuity test instrument 10 is connect with the first down conductor and second respectively by connection clamp The connection of ground downlead, the one of down conductor of connection clamp connection is constant, using the first down conductor as fixed reference Point, staff hold controlling terminal 11, change another connection clamp and connect from different down conductors, in confirmation wiring Clip connect with down conductor it is errorless after, by controlling terminal 11 to conducting tester 10 send test indication signal, conducting Tester 10 can test two connect at this time by connection clamp with continuity test instrument 10 after receiving the test indication signal Conduction resistance value between a down conductor.

The conduction resistance value that acquisition is tested in continuity test instrument 10 can directly save the storage core into continuity test instrument 10 In piece, continuity test instrument 10 can also be connect by Serial Port Line with computer, conducting resistance data are transmitted in computer, can be passed through Computer observes the D.C. resistance between the down conductor of the power equipment of test and another down conductor in real time, to sentence Break the electrical integrity of the power equipment.

In above scheme, by the controlling terminal that is wirelessly connected with continuity test instrument, it can be achieved that continuity test process Long-range control, the connection clamp that staff holds controlling terminal and connect with p-wire follow test point constantly to move, far The entire test process of process control at most only needs two staff then achievable, and does not need to use hand between two staff Machine or intercom, which are linked up, to be started to test again, and live clamp personnel can directly be led by controlling terminal control after the completion of clamp Logical tester starts to test, and another staff only need to observe conduction resistance value before the computer connecting with continuity test instrument and sentence The connection of disconnected down conductor, improves work efficiency.

After getting the conduction resistance value between two down conductors, compares, can sentence with continuity test testing regulations Conducting situation that is disconnected and knowing earth mat.Its conduction resistance value of equipment in order should be in 50m Ω hereinafter, conduction resistance value is The status of equipment of 50m Ω -200m Ω is fine, its variation can be paid close attention in test from now on, should be for important equipment Proper time inspection processing, conduction resistance value is that the status of equipment of 200m Ω -1 Ω is bad, important if equipment is located at the section Equipment should as early as possible inspection handle, other equipment can inspection at the appropriate time processing, and conducting resistance be 1 Ω or more equipment then It is not connected with grounded screen, it inspection should handle as early as possible, avoid power equipment lost territory from running, cause safety accident.Therefore, it is testing If find that the test value of conduction resistance value is more than 50m Ω in the process, verifying should be tested repeatedly.

Specifically, referring to Fig. 2, test device 102 includes that constant-current source 1021 and voltage obtain in continuity test instrument 10 Device 1022, constant-current source 1021, voltage acquisition apparatus 1022 are connect with the first controller 101 of continuity test instrument 10 respectively, the One controller 101 opens constant-current source 1021 in the test indication signal for receiving the transmission of controlling terminal 11, according to the indication signal, Electric current in constant-current source 1021 flows through the first down conductor and the second down conductor connecting with continuity test instrument 10, the Current loop, voltage acquisition apparatus are formed between one down conductor, grounded screen, the second down conductor and constant-current source 1021 1022 connect with two down conductors, obtain the voltage when 1021 electric current of constant-current source flows through between two down conductors Value.

Further, connecting terminal, respectively the first current terminal C1, second there are four being set on continuity test instrument 10 Current terminal C2, first voltage terminals P1 and second voltage terminals P2, the survey that the first current terminal C1 is connected The p-wire that examination line and first voltage terminals P1 are connected is one group of p-wire, can be connect by same connection clamp with first The connection of ground downlead, the p-wire that the p-wire and second voltage terminals P2 that the second current terminal C2 is connected are connected For one group of p-wire, can be connect by another connection clamp with the second down conductor；Constant-current source 1021 in test device 102 First end is connect by the first current terminal C1 with the first down conductor, and the second end of constant-current source 1021 passes through the second electric current Terminals C2 is connect with the second down conductor, and the first end of voltage acquisition apparatus 1022 passes through first voltage terminals P1 and the The second end of the connection of one down conductor, voltage acquisition apparatus 1022 passes through second voltage terminals P2 and the second down conductor Connection.

Constant-current source 1021 can accordingly adjust the output voltage of oneself in the case where loading variation, so that it exports electric current It remains unchanged, which is based on Ohm's law, when between two down conductors connecting with continuity test instrument When conducting resistance passes through a certain size electric current, continuity test instrument 10 can measure to obtain a voltage value, the ratio of voltage and voltage Value is exactly conduction resistance value at this time.

The circuit between down conductor and grounded screen that the earth-return circuit continuity test system passes through measurement power equipment Resistance value carrys out the grounding connection situation of detection device, can also be determined by measured data compared with all previous data by analysis Whether carry out excavating inspection；It should be noted that the earth-return circuit continuity test system, can be used for the ground connection in the present embodiment The test of device electrical integrity, can be used for the measurement of low resistance resistance value.

Optionally, the conduction resistance value that continuity test instrument 10 obtains can be sent to control by the first wireless communication module 103 Terminal 11 processed, controlling terminal 11 receive the conduction resistance value that continuity test instrument 10 is sent by the second wireless communication module 112, and It is sent to after being parsed to the wireless signal sent in the second controller 111 of controlling terminal 11；It is control refering to Fig. 3, Fig. 3 The outside schematic diagram of terminal 11, the controlling terminal 11 include display screen 113 and storage unit, the display screen 113 and storage Unit is connect with second controller, and received conduction resistance value can directly save depositing to controlling terminal in second controller In storage unit, on the other hand, it can be shown on interface by display screen 113, so that staff checks test result.

By the display screen 113 being arranged in controlling terminal 11, staff passes through in the position far from continuity test instrument Wireless mode control continuity test instrument tests the conducting resistance of down conductor, and test result data is transferred to control In terminal processed, conduction resistance value can be directly displayed on the display screen of controlling terminal, it, can under the premise of guaranteeing to test safety Realization only needs a staff to complete entire test process, it is only necessary to which continuity test instrument is placed on fixed point, a work people Connection clamp member hand-held controlling terminal 11 and connect with p-wire, constantly variation wiring position, contact good in connection clamp When good, mode controls continuity test instrument and is tested by wireless communication, and test result is by being wirelessly transmitted to controlling terminal 11 Display screen 113, staff need to only hold the controlling terminal 11 can realize test grounding net of transformer substation earth-continuity feelings Condition, convenient test is easy to operate, and the earthing test for 220kV and the 500kV substation taken up a large area reduces work The quantity of personnel and the labor intensity of staff, improve work efficiency.

Optionally, controlling terminal 11 further includes the USB interface connecting with storage unit, second controller in controlling terminal 11 After the conduction resistance value sent in getting continuity test instrument, on the one hand it can be displayed on display screen 113, it on the other hand, can It saves in the memory unit, it can be complete by test data using USB flash disk or external equipment by the USB interface that is connected with storage unit Portion directly exports or the export of optional part；Another optional embodiment is to be equipped with data preservation in controlling terminal 11 to press Key, the key are connect with second controller, and what the second controller of controlling terminal 11 was sent in receiving continuity test instrument leads After energization resistance value, directly it will be shown on display screen 113, after measured value is stablized, tied if staff confirms that this is tested Fruit can press data and save health care, triggering second controller saves the data in the memory unit without obvious exception.

Optionally, controlling terminal 11 further includes test switch, which connect with second controller, tests switch Pressing part extends to the shell of controlling terminal 11 as test key, when staff presses test key, test switch Closure triggers second controller by the second wireless communication module at this time and sends test indication signal to conducting tester 10, because This, during the test, the connection clamp that staff can hold the controlling terminal 11 and connect with p-wire, transformation connects The down conductor for connecing distinct device, presses the test key of controlling terminal 11, and controlling terminal 11 then can be to conducting tester 10 Test indication signal is sent, the conduction resistance value between two down conductors of 10 pairs of continuity test instrument connections is surveyed Amount, also, test result returns to controlling terminal 11 in real time, and staff can be from the display screen 113 of controlling terminal 11 To the conduction resistance value measured at this time, after quantity to be measured is stablized, after numerical value does not have significant change, the electric conduction measured at this time is recorded Resistance value, or the data saving button in controlling terminal 11 is pressed, save second controller data into storage unit.

Optionally, in continuity test instrument 10, the first wireless communication module 103 is logical by first antenna and controlling terminal 11 Letter.Compared with wire transmission, wireless transmission is more flexible, and wireless signal can be from the transmitting in the first wireless communication module 103 Device is issued to multiple receivers without cable, and the wireless signal of sending is transmitted with electromagnetic wave by air, and antenna is made For the indispensable important component of wireless communication system, it is wirelessly transferred by radiating and receiving electromagnetic wave, first Wireless signal in wireless communication module 103 reaches first antenna from transmitter, and then first antenna is using signal as a series of Electromagnetic radiation is into air, and signal is by air borne, by the receiver of the second wireless communication module 112 in controlling terminal 11 It receives.

First antenna interface is additionally provided on continuity test instrument 10, first antenna can be surveyed by first antenna interface from conducting The insertion of examination instrument 10 is removed, and after completing test process, first antenna can be removed from continuity test instrument 10 and properly saved, It avoids in the handling process antenna being caused to wear.

Optionally, the first wireless communication module of the second wireless communication module in controlling terminal 11 and continuity test instrument 10 Identical, the second wireless communication module is communicated by the second antenna with continuity test instrument, also, controlling terminal 11 is equipped with second day Line interface 114, the second antenna can be inserted into or be removed from controlling terminal 11 by the second antennal interface 114.

It should be noted that controlling terminal 11 carries out sending and receiving for wireless signal with continuity test instrument 10, use Antenna, and information is exchanged, the transmitter and receiver being connected on each antenna must be adjusted to identical frequency.

Optionally, continuity test instrument 10 further includes the first power module and the first power interface, and the first power module can Think battery, is electrically connected with modules in tester, for powering for modules in continuity test instrument 10, first Power module is connected with the first power switch, staff by the first power switch can control battery voltage output or It disconnects, battery can be charged by the first power interface from external power supply, in the same manner, also be provided with second source in controlling terminal 11 Module and second source interface, second power supply module are that controlling terminal 11 is powered, and can be by second source interface from outside Power source charges.

Optionally, battery capacity indication lamp 115 is additionally provided in controlling terminal 11, battery capacity indication lamp 115 and second power supply module connect It connects, monitors the remaining capacity of second power supply module, by the different colours of indicator light, staff is known that battery is current Remaining electricity, when the power is insufficient, battery capacity indication lamp can remind staff to charge in time by constantly flashing.

The utility model has the beneficial effects that staff can survey conducting by the earth-return circuit continuity test system Examination instrument and the one of down conductor connecting with continuity test instrument immobilize, and hold controlling terminal and survey with conducting The connection clamp of instrument connection is tried, changes connection clamp and is connected from different down conductors, in confirmation connection clamp and grounding lead It is offline contact it is good when, by controlling terminal remotely to conducting tester send test indication signal so that continuity test instrument survey The conduction resistance value between two down conductors at this time is tried, which wirelessly realizes continuity test instrument and control The connection of terminal processed solves live clamp personnel and instrumentation people in the prior art for the substation taken up a large area Member links up inconvenient problem, reduces the working strength of staff, improves work efficiency.

The foregoing is merely the alternative embodiments of the utility model, are not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of earth-return circuit continuity test system, which is characterized in that including continuity test instrument and controlling terminal, the conducting Tester includes the first controller, test device and the first wireless communication module, first wireless communication module, the survey Trial assembly set it is equal connect with first controller, the test device respectively with the first down conductor, the second down conductor Connection, the controlling terminal include second controller and the second wireless communication module for connecting with the second controller；Institute The second wireless communication module is stated for sending test indication signal to first wireless communication module.

2. system according to claim 1, which is characterized in that the test device includes that constant-current source and voltage obtain dress It sets, the constant-current source, the voltage acquisition apparatus are connect with first controller respectively, and the voltage acquisition apparatus is for obtaining Take the voltage value between first down conductor and second down conductor.

3. system according to claim 2, which is characterized in that the continuity test instrument further include the first current terminal, Second current terminal, first voltage terminals and second voltage terminals, the first end of the constant-current source pass through described the One current terminal is connect with first down conductor, and the second end of the constant-current source passes through second current terminal Connect with second down conductor, the first end of the voltage acquisition apparatus by the first voltage terminals with it is described The connection of first down conductor, the second end of the voltage acquisition apparatus are connect by the second voltage terminals with described second The connection of ground downlead.

4. system according to claim 1, which is characterized in that the continuity test instrument is also used to send out to the controlling terminal Send conduction resistance value, the controlling terminal includes storage unit and display screen, and the storage unit, the display screen are and institute Second controller connection is stated, the display screen is for showing the conduction resistance value that the second controller transmits.

5. system according to claim 4, which is characterized in that the controlling terminal further includes connecting with the storage unit USB interface so that the controlling terminal exports to the conduction resistance value saved in the storage unit and the USB In the external equipment of interface connection.

6. system according to claim 4, which is characterized in that the controlling terminal further includes test switch, the test Switch is connected with the second controller, so that the second controller is when the test is closed the switch through second nothing Line communication module sends test indication signal to the continuity test instrument.

7. system according to claim 4, which is characterized in that first wireless communication module passes through first antenna and institute Controlling terminal communication is stated, the continuity test instrument further includes first antenna interface, and the first antenna passes through the first antenna Interface can be inserted into or remove from the continuity test instrument.

8. system according to claim 4, which is characterized in that second wireless communication module passes through the second antenna and institute The communication of continuity test instrument is stated, the controlling terminal further includes the second antennal interface, and second antenna passes through second antenna Interface can be inserted into or remove from the controlling terminal.

9. system according to claim 8, which is characterized in that the controlling terminal further includes that power module and power supply connect Mouthful, the power module includes battery, and for powering for the controlling terminal, the power module passes through the power interface It can charge from external power supply.

10. system according to claim 9, which is characterized in that the controlling terminal further includes battery capacity indication lamp, the electricity Amount indicator light is connect with the power module, is used to indicate the remaining capacity of the power module.