CN205749685U - Earth resistance tester device - Google Patents
Earth resistance tester device Download PDFInfo
- Publication number
- CN205749685U CN205749685U CN201620438113.4U CN201620438113U CN205749685U CN 205749685 U CN205749685 U CN 205749685U CN 201620438113 U CN201620438113 U CN 201620438113U CN 205749685 U CN205749685 U CN 205749685U
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- Prior art keywords
- rotating shaft
- earth resistance
- resistance tester
- upper cartridge
- cartridge body
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- 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.)
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- 238000005192 partition Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004804 winding Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 244000309464 bull Species 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
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Abstract
This utility model relates to the technical field of instrument detection, especially relates to a kind of earth resistance tester device, including: lower box body, upper cartridge body and earth resistance tester；Earth resistance tester is positioned in lower box body；Upper cartridge body is positioned at above lower box body；There is in upper cartridge body cavity, in cavity, be provided with rotating shaft, for the winding of the wire of earth resistance tester；Being provided with speed setting unit in rotating shaft, speed setting unit includes that drivewheel and driven pulley, driven pulley and rotating shaft are fixedly and coaxially connected, and drivewheel drives driven pulley to rotate by gear drive；Owing to being provided with speed setting unit in rotating shaft, owing to drivewheel is identical with the linear velocity of driven pulley, radius is different, so the angle that drivewheel turns over driven pulley within the identical time is different, regulate the rotating speed of driven pulley by drivewheel thus regulate the rotating speed of rotating shaft, solve the technical problem that rotating shaft rotating speed cannot favorably regulate, bring technique effect easy to use.
Description
Technical field
This utility model relates to the technical field of instrument detection, especially relates to a kind of earth resistance tester device.
Background technology
Along with the development of society, the demand for electric power is more and more higher, sets up electric device on earth's surface and has become as electric power
An indispensable ring of system development.The laying of electric device includes the erection of electricity tower, and at present, different earth's surface shapes all needs
Carry out the laying of electricity tower, to meet people's demand for power supply.
Before electricity tower is laid, owing to electricity tower needs to be implanted to below earth's surface, therefore need to measure earth resistance, use ground connection
Resistance meter, needs to use wire during earth resistance tester is measured, owing to landform situation is different, it usually needs
The length of the wire used is the longest, often arbitrarily places due to wire and causes the winding of wire, knotting, passes through in prior art
Rotating shaft is set, wire is wrapped in rotating shaft, but, get more and more the rotating speed of rotating shaft due to wire during wire is wound around
Can be increasingly slower, fewer and feweri due to wire when unwrapping wire, the rotating speed of rotating shaft can be increasingly faster, wire can be brought to release and regain
Speed cannot control effectively, inconvenient problem with use.
Utility model content
The purpose of this utility model is to provide a kind of earth resistance tester device, to solve present in prior art
Rotating shaft rotating speed when wire is wound around more controls the technical problem of difficulty.
A kind of earth resistance tester device that this utility model provides, including: lower box body, upper cartridge body and earth resistance are surveyed
Examination instrument；
Earth resistance tester is positioned in described lower box body；
Upper cartridge body is positioned at above described lower box body；
There is in upper cartridge body cavity, in cavity, be provided with rotating shaft, for the winding of the wire of earth resistance tester；
Being provided with speed setting unit in rotating shaft, speed setting unit includes drivewheel and driven pulley, driven pulley and rotating shaft
Being fixedly and coaxially connected, drivewheel drives driven pulley to rotate by gear drive.
Further, being provided with dividing plate in cavity, rotating shaft passes described dividing plate, two ends respectively with the inner side of described upper cartridge body
Wall connects.
Further, one end of rotating shaft passes the sidewall of described upper cartridge body and outer turn be positioned on described upper cartridge body lateral wall
Hands connects.
Further, the lateral wall of upper cartridge body is provided with groove, changes hands outward and be positioned at described groove, change hands outward and there is folding
Folded button, it is possible to be fitted in described bottom portion of groove by changing hands outward folding.
Further, being provided with dividing plate in cavity, one end of rotating shaft is connected with described dividing plate, and the other end is interior with upper cartridge body
Sidewall connects.
Further, one end of rotating shaft through described dividing plate be positioned at dividing plate opposite side and change hands and be connected.
Further, rotating shaft is additionally provided with internal partition, for described rotating shaft being divided into two regions.
Further, being provided with demarcation strip between lower box body and described upper cartridge body, described demarcation strip covers at described ground connection electricity
On resistance tester, it is used for protecting described earth resistance tester not to be damaged.
Further, the side of upper cartridge body and lower box body connects, and opposite side is connected by the snap close matched.
Further, the lateral wall of described lower box body is provided with handle.
The earth resistance tester device that this utility model provides, owing to being provided with speed setting unit in rotating shaft, works as line
Material is the longest, be wound into below be wound around resistance increasing time, transmit external force by drivewheel to driven pulley, driven pulley passes to again
Rotating shaft, at drivewheel and driven pulley in the transmittance process to power, owing to drivewheel is identical with the linear velocity of driven pulley, radius is not
With, so the angle that drivewheel turns over driven pulley within the identical time is different, regulate turning of driven pulley by drivewheel
Speed thus regulate the rotating speed of rotating shaft, solve the technical problem that rotating shaft rotating speed cannot favorably regulate, bring skill easy to use
Art effect.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model detailed description of the invention or technical scheme of the prior art, below by right
In detailed description of the invention or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be embodiments more of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The perspective view of the earth resistance tester device that Fig. 1 provides for this utility model embodiment；
The drivewheel of the earth resistance tester device that Fig. 2 provides for this utility model embodiment and the vertical view of driven pulley
Figure；
The another kind of drivewheel of the earth resistance tester device that Fig. 3 provides for this utility model embodiment and driven pulley
Right view；
Standing of the upper cartridge body with outer handle of the earth resistance tester device that Fig. 4 provides for this utility model embodiment
Body structural representation；
The earth resistance tester device that Fig. 5 provides for this utility model embodiment there is the vertical of inner handle upper cartridge body
Body structural representation；
Fig. 6 shows for the stereochemical structure of the earth resistance tester device with demarcation strip that this utility model embodiment provides
It is intended to；
The three-dimensional knot of the earth resistance tester device with snap close and handle that Fig. 7 provides for this utility model embodiment
Structure schematic diagram.
Reference:
1-lower box body；2-upper cartridge body；3-earth resistance tester；
4-rotating shaft；5-drivewheel；6-driven pulley；
7-dividing plate；8-changes hands outward；9-groove；
10-folding fastener；Change hands in 11-；12-internal partition；
13-demarcation strip 14-snap close 15-handle
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described, it is clear that described
Embodiment is a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, this
The every other embodiment that field those of ordinary skill is obtained under not making creative work premise, broadly falls into this practicality
Novel protected scope.
In description of the present utility model, " " center ", " on ", D score, "left", "right", " perpendicular it should be noted that term
Directly ", " level ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, be only
Must have specific for the ease of describing this utility model and simplification description rather than instruction or the device of hint indication or element
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", should be interpreted broadly " being connected ", " connection ", for example, it may be fix connection, it is also possible to be to removably connect, or integratedly
Connect；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Language concrete meaning in this utility model.
Embodiment one
As shown in Figure 1, Figure 2 and Figure 3: the earth resistance tester device that the present embodiment provides, including lower box body 1, upper box
Body 2 and earth resistance tester 3；Earth resistance tester 3 is positioned in lower box body 1；Upper cartridge body 2 is positioned at above lower box body 1；
There is in upper cartridge body 2 cavity, in cavity, be provided with rotating shaft 4, for the winding of the wire of earth resistance tester 3；Set in rotating shaft 4
Being equipped with speed setting unit, speed setting unit includes that drivewheel 5 and driven pulley 6, driven pulley 6 and rotating shaft 4 are fixedly and coaxially connected,
Drivewheel 5 drives driven pulley 6 to rotate by gear drive.
Wherein, a rib of lower box body 1 and a rib of upper cartridge body 2 are hinged, realize the upset of upper cartridge body 2.
Wherein, the articulated manner of upper cartridge body 2 and lower box body 1 can be gemel connection, it is also possible to is two and be arranged in parallel
Folding fastener connects.
Wherein, the inside bottom of lower box body 1 is provided with groove, the size of groove and the size phase of earth resistance tester 3
With, it is used for preventing earth resistance tester 3 in lower box body 1 and causes movement owing to jolting time long.
Wherein, the operation display interface of earth resistance tester 3 is towards upper cartridge body 2, and including main body machine, main body machine surface sets
It is equipped with switch, voltage display screen, electric current display screen, is provided with voltage stabilizing control switch on the left of voltage display screen and Current limited Control is opened
Close, display screen away from the side being connected with upper cartridge body 2 be provided with overvoltage adjusting knob, voltage-regulation knob, current adjusting knob,
The extreme mouth of positive potential, the extreme mouth of nagative potential, positive potential regulation switch and nagative potential regulation switch, the letter of earth resistance tester structure
Single, volume is little, and display screen is LED photovoltaic display, is adapted under varying environment observe numeral, and overvoltage adjusting knob, voltage are adjusted
Joint knob, current adjusting knob, the extreme mouth of positive potential, the extreme mouth of nagative potential, positive potential regulation switch and nagative potential regulation switch
Point-blank, it is simple to operation.
Wherein, rotating shaft existing way in upper cartridge body can be the upper cover being perpendicular to upper cartridge body, it is also possible to be perpendicular to
The medial wall of box body, there are two kinds of situations the medial wall being wherein perpendicular to upper cartridge body, and one is that rotating shaft is perpendicular to upper cartridge body and lower box
The connecting edge of body, another kind is the connecting edge that rotating shaft is perpendicular to upper cartridge body and lower box body.
Wherein, rotating shaft realizes rotating by the rotary shaft being fixed on upper cartridge body.
Wherein, the drivewheel of speed setting unit is steamboat, and driven pulley is bull wheel, and such design can drive rotating shaft
During rotation more laborsaving；Another way be drivewheel be bull wheel, driven pulley is steamboat, and such design axis of rotation is more
Hurry up, time-consuming, increase work efficiency.
As improvement, speed setting unit device can be three runners, bull wheel, middle takes turns and steamboat, and bull wheel and steamboat divide
Not being positioned at the middle both sides taken turns, bull wheel and steamboat are drivewheel, middle take turns as driven pulley, when bull wheel drives driven as drivewheel
During wheel, the rotating speed of driven pulley is very fast, and when steamboat drives driven pulley as drivewheel, ratio is relatively labor-saving, and driven pulley is with rotating shaft even
Connect.
Wherein, the environment used due to earth resistance tester device is general out of doors, needs direct for lower box body and ground
Table contacts, and orographic condition is sometimes the most severe, the bottom of lower box body can be caused abrasion, in order to avoid such phenomenon occurs,
Four angles of lower box body are provided with leg, it is therefore an objective to reserve certain space to lower box body and earth's surface.
The earth resistance tester device that this utility model provides, owing to being provided with speed setting unit in rotating shaft, works as line
Material is the longest, be wound into below be wound around resistance increasing time, transmit external force by drivewheel to driven pulley, driven pulley passes to again
Rotating shaft, at drivewheel and driven pulley in the transmittance process to power, owing to drivewheel is identical with the linear velocity of driven pulley, radius is not
With, so the angle that drivewheel turns over driven pulley within the identical time is different, regulate turning of driven pulley by drivewheel
Speed thus regulate the rotating speed of rotating shaft, solve the technical problem that rotating shaft rotating speed cannot favorably regulate, bring skill easy to use
Art effect.
Embodiment two
As it is shown in figure 1, the present embodiment is on the basis of embodiment one, being provided with dividing plate 7 in cavity, rotating shaft 4 is through dividing plate
7, two ends are connected with the medial wall of upper cartridge body respectively.
Wherein, dividing plate 7 can be connected with the medial wall of upper cartridge body 2 on three limits, and such effect is so that dividing plate 7 is solid
Fixed.The another kind of fixed form of dividing plate 7 is exactly the fixing of dividing plate 7 and rotating shaft 4, and rotating shaft 4 is provided with groove, dividing plate 7 block and
In groove.Another kind of fixed form can be to have the friction pad of projection in rotating shaft 4, and the top of friction pad has friction grain, energy
Enough increase friction pad and the frictional force of dividing plate 7, so that dividing plate is fixed.
Wherein, the placement location of dividing plate 7 is positioned at the centre of rotating shaft.
In the present embodiment, the effect of dividing plate is that rotating shaft is divided into two regions, and a region is wound around electrode line, another
Region is wound around negative line so that electrode line and negative line are in different regions, it is to avoid be wound around.
Embodiment three
As shown in Figure 4, the present embodiment is on the basis of embodiment two, and one end of rotating shaft 4 passes sidewall and the position of upper cartridge body 2
Outer on upper cartridge body lateral wall changes hands 8 connections.
Wherein, the outside changing hands outward 8 is provided with protruding fritter, changes hands the frictional force with hands outside increasing, and prevents from skidding.
Wherein, the material changing hands outward 8 is wooden or plastic material.
Wherein, the shape changing hands outward 8 can be Z-shaped.
Wherein, the lateral wall of upper cartridge body is arranged porose, rotating shaft 4 through hole with change hands outward 8 and fix and be connected.
In the present embodiment, the setting of 8 is changed hands outward, it is possible in the outside of upper cartridge body 2 by the rotation drive turn changing hands outward 8
Axle 4 rotates, it is achieved the folding and unfolding of electrode wires, simple and convenient, saves work efficiency.
Embodiment four
As shown in Figure 4, the present embodiment is on the basis of embodiment three, it is provided that resistance test instrument apparatus, outside upper cartridge body 2
It is provided with groove 9 on sidewall, changes hands outward 8 and be positioned at groove 9, change hands outward 8 and there is folding fastener 10, it is possible to 8 folding patches will be changed hands outward
It is combined in the bottom of groove 9.
Wherein, groove 9 is positioned on the lateral wall of upper cartridge body 2, and the area of groove 9 is more than the area changing hands outward 8, groove 9
The degree of depth is more than the thickness changing hands outward 8.
Wherein, being shaped as of groove 9 is trapezoidal, and the direction close to the lateral wall of upper cartridge body 2 is the trapezoidal upper end, and trapezoidal is upper
The area at the end is less than the area gone to the bottom.During rotating, big space is needed, so trapezoidal being gone to the bottom owing to changing hands outward 8
Be arranged on outside, the effect of such design be for change hands outward 8 rotate provide do enough spaces.
Wherein, changing hands outward the folding fastener 10 on 8 and be positioned at and outer change hands 8 close to the side of upper cartridge body 2, the form of folding fastener 10 can
Think and be arranged on the outer jump ring changed hands, i.e. outer change hands 8 and be divided into two parts, two-part contact is provided with jump ring, realize
Change hands outward bending and the ejection of 8.
In the present embodiment, by arranging groove 9 and folding fastener 10 so that when changing hands 8 outside not using, can be by folding
Folded button 10 is fitted in changing hands outward 8 foldings in groove 9, prevents from changing hands 8 when taking grounding resistor test device outside scratching,
Bring the inconvenience of use process.
Embodiment five
The present embodiment, on the basis of embodiment one, is provided with dividing plate 7 in cavity, one end of rotating shaft 4 is connected with dividing plate 7,
The other end is connected with the medial wall of upper cartridge body 2.
Wherein, the position of dividing plate 7 is fixed, and dividing plate 7 is connected by groove is fixing with the medial wall of upper cartridge body 2.
In the present embodiment, rotating shaft 4 is for being wound around electrode wires, and dividing plate 7 has cavity, cavity away from the side of rotating shaft 4
The article used, such as Wiping article etc. are needed during inside may be used for being placed on measurement.
The present embodiment provide earth resistance tester device, by by the two ends of rotating shaft respectively with 7 upper cartridge bodies 2 of dividing plate
Medial wall connect, add the cavity of the opposite side of dividing plate 7, add the receiving space in upper cartridge body 2, convenient.
Embodiment six
As it is shown in figure 5, the present embodiment is on the basis of embodiment five, one end of rotating shaft 4 passes dividing plate 7 and is positioned at dividing plate 7
11 connections are changed hands in opposite side.
Wherein, dividing plate 7 having hole, one end of rotating shaft 4 is changed hands 11 through the hole of dividing plate 7 be connected with interior.
Inside change hands the setting of 11, it is possible to by changing hands 11 rotations realizing rotating shaft in rotating in upper cartridge body 2, it is achieved electricity
The folding and unfolding of polar curve.Inside change hands 11 in upper cartridge body 2, solve and change hands the mobile grounding resistance meter prevented outside upper cartridge body
Device constant, and 11 can be changed hands in protecting avoid being worn when not in use.
Wherein, inside change hands 11 be shaped as Z-shaped.
Embodiment seven
As it is shown in figure 5, the present embodiment is on the basis of embodiment six, rotating shaft 4 is additionally provided with internal partition 12, for turning
Axle 4 is divided into two regions.
In the present embodiment, the design of internal partition 12, rotating shaft 4 be divide into two regions, electrode line and negative line are divided
Open, prevent the winding between positive and negative polar curve.
Wherein, internal partition 12 and the fixing connection of rotating shaft 4.
Embodiment eight
As shown in Figure 6, the present embodiment, on the basis of embodiment seven, is provided with demarcation strip between lower box body 1 and upper cartridge body 2
13, demarcation strip 13 covers on described earth resistance tester, is not damaged for protective grounding resistance meter 3.
Wherein, a rib of demarcation strip 13 and a rib of lower box body fold and connect.
As the another kind of existing way of demarcation strip 13, demarcation strip 13 is independently arranged, and is taken off by demarcation strip 13 in use,
When not using, demarcation strip 13 is placed on earth resistance tester.
Embodiment nine
As it is shown in fig. 7, the present embodiment is on the basis of embodiment one, the side of upper cartridge body 2 and lower box body 1 connects, another
Side is connected by the snap close 14 matched.
Embodiment ten
As it is shown in fig. 7, the present embodiment is on the basis of embodiment nine, the lateral wall of lower box body 1 is provided with handle 15.
Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, rather than it is limited
System；Although being described in detail this utility model with reference to foregoing embodiments, those of ordinary skill in the art should
Understand: the technical scheme described in foregoing embodiments still can be modified by it, or to the most some or all of
Technical characteristic carries out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from this practicality new
The scope of type each embodiment technical scheme.
Claims (10)
1. an earth resistance tester device, it is characterised in that including: lower box body, upper cartridge body and earth resistance tester；
Described earth resistance tester is positioned in described lower box body；
Described upper cartridge body is positioned at above described lower box body；
There is in described upper cartridge body cavity, in described cavity, it is provided with rotating shaft, for the wire of described earth resistance tester
It is wound around；
Being provided with speed setting unit in described rotating shaft, described speed setting unit includes drivewheel and driven pulley, described driven
Wheel and described rotating shaft are fixedly and coaxially connected, and described drivewheel drives described driven pulley to rotate by gear drive.
Earth resistance tester device the most according to claim 1, it is characterised in that be provided with dividing plate in described cavity,
Described rotating shaft passes described dividing plate, and medial wall with described upper cartridge body respectively, two ends is connected.
Earth resistance tester device the most according to claim 2, it is characterised in that one end of described rotating shaft is through described
The sidewall of upper cartridge body is connected with outer the changing hands being positioned on described upper cartridge body lateral wall.
Earth resistance tester device the most according to claim 3, it is characterised in that set on the lateral wall of described upper cartridge body
Being equipped with groove, described outer changing hands is positioned at described groove, and described outer changing hands has folding fastener, it is possible to described outer changing hands is folded patch
It is combined in described bottom portion of groove.
Earth resistance tester device the most according to claim 1, it is characterised in that be provided with dividing plate in described cavity,
One end of described rotating shaft is connected with described dividing plate, and the other end is connected with the medial wall of described upper cartridge body.
Earth resistance tester device the most according to claim 5, it is characterised in that one end of described rotating shaft is through described
Dividing plate be positioned at described dividing plate opposite side and change hands and be connected.
7. according to the earth resistance tester device described in claim 5 or 6, it is characterised in that be additionally provided with in described rotating shaft
Internal partition, for being divided into two regions by described rotating shaft.
Earth resistance tester device the most according to claim 7, it is characterised in that described lower box body and described upper cartridge body
Between be provided with demarcation strip, described demarcation strip covers on described earth resistance tester, is used for protecting described earth resistance
Instrument is not damaged.
Earth resistance tester device the most according to claim 1, it is characterised in that described upper cartridge body and described lower box body
Side connect, opposite side is connected by the snap close that matches.
Earth resistance tester device the most according to claim 9, it is characterised in that on the lateral wall of described lower box body
It is provided with handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620438113.4U CN205749685U (en) | 2016-05-13 | 2016-05-13 | Earth resistance tester device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620438113.4U CN205749685U (en) | 2016-05-13 | 2016-05-13 | Earth resistance tester device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205749685U true CN205749685U (en) | 2016-11-30 |
Family
ID=57365770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620438113.4U Expired - Fee Related CN205749685U (en) | 2016-05-13 | 2016-05-13 | Earth resistance tester device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205749685U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110058085A (en) * | 2019-05-09 | 2019-07-26 | 南京理工中爆安全科技有限公司 | A kind of earth resistance tester |
-
2016
- 2016-05-13 CN CN201620438113.4U patent/CN205749685U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110058085A (en) * | 2019-05-09 | 2019-07-26 | 南京理工中爆安全科技有限公司 | A kind of earth resistance tester |
| CN110058085B (en) * | 2019-05-09 | 2021-02-02 | 南京理工中爆安全科技有限公司 | Ground resistance tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 |