CN112147464A - Device for testing earth surface potential gradient distribution of transformer substation grounding grid - Google Patents
Device for testing earth surface potential gradient distribution of transformer substation grounding grid Download PDFInfo
- Publication number
- CN112147464A CN112147464A CN202011036376.XA CN202011036376A CN112147464A CN 112147464 A CN112147464 A CN 112147464A CN 202011036376 A CN202011036376 A CN 202011036376A CN 112147464 A CN112147464 A CN 112147464A
- Authority
- CN
- China
- Prior art keywords
- potential pole
- potential
- driving
- iron
- personal computer
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
Abstract
The invention relates to a device for testing the earth surface potential gradient distribution of a transformer substation grounding grid, which comprises a horizontal plate, 4 wheels for movement, a driving device, a moving motor, a power supply, an industrial personal computer, a metal disc potential pole, a metal rod, an iron rod potential pole, a ground pattern collector, a driving iron rod potential pole motor, a driving metal disc potential pole motor and a remote controller, wherein the 4 wheels for movement are arranged on the horizontal plate; the industrial personal computer is connected with the remote controller, the ground pattern collector is connected with the industrial personal computer, the industrial personal computer is respectively connected with the driving iron rod potential pole motor and the driving metal disc potential pole motor, the driving iron rod potential pole motor and the driving metal disc potential pole motor are respectively connected with the upper end of the iron rod potential pole and the upper end of the metal rod through bevel gear sets, the lower end of the metal rod is connected with the metal disc potential pole, and the metal disc potential pole and the iron rod potential pole are connected with the test instrument. The invention can ensure that the testing path is a straight line, avoids errors caused by human factors during manual wiring, and reduces the physical labor of testing personnel.
Description
Technical Field
The invention relates to a device for testing the gradient distribution of the earth surface potential of a transformer substation grounding grid, and belongs to the technical field of power equipment.
Background
When the short-circuit fault current flows through the grounding device, a potential gradient distribution is formed on the surface of the field area where the grounding device is located. At present, the earth surface potential gradient distribution test of the grounding grid adopts manual point distribution test, errors can be generated in the arrangement position and the arrangement direction of measuring points, the depth of the potential pole iron drill inserted into the ground or the contact force between a metal disc and the ground is not consistent due to the manual point distribution, standardization is difficult to realize, larger errors are caused to the earth surface potential gradient distribution test, meanwhile, a large amount of repeated labor is needed by testers on site, and the workload is heavy.
At present, a transformer substation grounding grid surface potential gradient distribution test is carried out in a manual wiring mode, measuring point intervals are measured by using a measuring tape, the grounding grid surface potential gradient distribution test requires that all measuring points are on the same straight line as much as possible, but certain errors exist due to manual wiring, meanwhile, the number of the measuring points needing to be tested in the transformer substation is large, and by taking a 200m × 200m transformer substation as an example, data of more than 4000 measuring points are required to be tested, and a large amount of manpower is required.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides a device for testing the ground surface potential gradient distribution of a transformer substation grounding grid, which is used for solving the error caused by human factors in the process of testing the ground surface potential gradient distribution of the transformer substation grounding grid, is convenient for field testers to test and reduces the field workload of the testers.
The technical scheme of the invention is as follows: a transformer substation grounding grid earth surface potential gradient distribution testing device comprises horizontal plates 1, 4 moving wheels 2, a driving device moving motor 3, a power supply 5, an industrial personal computer 7, a metal disc potential pole 8, a metal rod 9, an iron rod potential pole 10, a ground pattern collector 11, a driving iron rod potential pole motor 13, a driving metal disc potential pole motor 14 and a remote controller 15;
4 moving wheels 2 are arranged below the horizontal plate 1, the 4 moving wheels 2 are connected with a driving device moving motor 3, a power supply 5 is used for supplying power, and an industrial personal computer 7, a metal disc potential pole 8, an iron brazing potential pole 10 and a ground pattern collector 11 are arranged on the horizontal plate 1;
the industrial personal computer 7 is connected with a remote controller 15, the ground pattern collector 11 is connected with the industrial personal computer 7, the industrial personal computer 7 is respectively connected with a driving iron-brazing potential pole motor 13 and a driving metal disc potential pole motor 14, the driving iron-brazing potential pole motor 13 and the driving metal disc potential pole motor 14 are respectively connected with the upper end of an iron-brazing potential pole 10 and the upper end of a metal rod 9 through bevel gear sets 4, the lower end of the metal rod 9 is connected with a metal disc potential pole 8, and the metal disc potential pole 8 and the iron-brazing potential pole 10 are connected with a testing instrument.
As a further scheme of the invention, the bevel gear set 4 comprises two first bevel gear sets and two second bevel gear sets, the first bevel gear sets and the second bevel gear sets are respectively connected with the upper end of the iron brazing potential pole 10 and the upper end of the metal rod 9, the first bevel gear sets and the second bevel gear sets are identical in structure and comprise a first gear and a second gear, the first gear of the first bevel gear set is connected with a driving iron brazing potential pole motor 13, the first gear of the second bevel gear sets is connected with a driving metal disc potential pole motor 14, the first gear is meshed with the second gear, threads are polished in the second gear, the second gear of the first bevel gear set is connected with the upper end of the iron brazing potential pole 10, and the second gear of the second bevel gear sets is connected with the upper end of the metal rod 9.
In a further aspect of the present invention, the horizontal plate 1 is a 1cm thick epoxy plate, and 4 wheels 2 for movement are fixed-direction wheels.
As a further scheme of the invention, a rubber pad 16 is adopted between the metal disc 8 and the metal rod 9 for insulation and isolation; the bottom of the iron chisel potential electrode 10 adopts a pointed end, so that the iron chisel potential electrode is conveniently inserted into the ground; the top end of the iron borer potential pole 10 is insulated and isolated from the driving gear set 4 by a rubber ring 17, and the metal disc potential pole 8 and the iron borer potential pole 10 are connected with a test instrument by a test wire 12.
As a further scheme of the invention, the industrial personal computer 7 and the remote controller 15 are both internally provided with wireless transmission chips and can carry out signal transmission in a long distance.
As a further scheme of the invention, the industrial personal computer 7 is internally provided with a GPS for positioning, carries out real-time positioning and calculation of moving distance in the moving process of the device, stops at equal intervals, and then places a test potential electrode.
The use method of the device for testing the ground potential gradient distribution of the transformer substation grounding grid comprises the following steps: the tester starts the device for testing the earth surface potential gradient distribution of the transformer substation grounding grid and the remote controller 15 thereof, after the industrial personal computer 7 and the remote controller 15 are wirelessly connected, the remote controller 15 is used for controlling the device for testing the earth surface potential gradient distribution of the grounding grid of the transformer substation to move at equal intervals, after the test point is reached and stays, the ground pattern collector 11 starts to take a picture and transmits the pattern to the industrial personal computer 7, after the industrial personal computer 7 identifies and analyzes the ground pattern, the corresponding motor is started to place the potential pole in place, the iron borer potential pole 10 is inserted into the non-cement hardened ground or the metal disc potential pole 8 to place the cement hardened ground, after the iron borer potential pole is placed in place, the industrial personal computer 7 sends a potential pole in-place signal to the remote controller 15, the tester then starts the test and sends a command to start the test at the next station via the remote control 15 after the test is completed.
The invention has the beneficial effects that: the invention can ensure that the testing path is a straight line, avoids errors caused by human factors during manual wiring, and greatly reduces the physical labor of testing personnel.
Drawings
FIG. 1 is a schematic structural diagram of a potential gradient distribution testing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a potentiometric electrode of the present invention;
FIG. 3 is a schematic diagram of a potential electrode portion of the present invention;
FIG. 4 is a wiring diagram of the present invention during field testing;
FIG. 5 is a flowchart of the operation of the potential gradient distribution testing apparatus according to the present invention.
The respective reference numerals in FIGS. 1 to 5: 1-horizontal plate, 2-wheel, 3-driving device moving motor, 4-driving gear set, 5-power supply, 6-power line, 7-industrial computer, 8-metal disc potential pole, 9-metal bar, 10-iron brazing potential pole, 11-ground pattern collector, 12-test line, 13-driving iron brazing potential pole motor, 14-driving metal disc potential pole motor, 15-remote controller, 16-rubber pad, 17-rubber ring.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Example 1: as shown in fig. 1-5, a device for testing the earth surface potential gradient distribution of a transformer substation grounding grid comprises horizontal plates 1, 4 wheels 2 for movement, a driving device moving motor 3, a power supply 5, an industrial personal computer 7, a metal disc potential electrode 8, a metal rod 9, an iron brazing potential electrode 10, a ground pattern collector 11, a driving iron brazing potential electrode motor 13, a driving metal disc potential electrode motor 14 and a remote controller 15;
4 moving wheels 2 are arranged below the horizontal plate 1, the 4 moving wheels 2 are connected with a driving device moving motor 3, a power supply 5 is used for supplying power, and an industrial personal computer 7, a metal disc potential pole 8, an iron brazing potential pole 10 and a ground pattern collector 11 are arranged on the horizontal plate 1;
the industrial personal computer 7 is connected with a remote controller 15, the ground pattern collector 11 is connected with the industrial personal computer 7, the industrial personal computer 7 is respectively connected with a driving iron-brazing potential pole motor 13 and a driving metal disc potential pole motor 14, the driving iron-brazing potential pole motor 13 and the driving metal disc potential pole motor 14 are respectively connected with the upper end of an iron-brazing potential pole 10 and the upper end of a metal rod 9 through bevel gear sets 4, the lower end of the metal rod 9 is connected with a metal disc potential pole 8, and the metal disc potential pole 8 and the iron-brazing potential pole 10 are connected with a testing instrument.
As a further scheme of the invention, the bevel gear set 4 comprises two first bevel gear sets and two second bevel gear sets, the first bevel gear sets and the second bevel gear sets are respectively connected with the upper end of the iron brazing potential pole 10 and the upper end of the metal rod 9, the first bevel gear sets and the second bevel gear sets are identical in structure and comprise a first gear and a second gear, the first gear of the first bevel gear set is connected with a driving iron brazing potential pole motor 13, the first gear of the second bevel gear sets is connected with a driving metal disc potential pole motor 14, the first gear is meshed with the second gear, threads are polished in the second gear, the second gear of the first bevel gear set is connected with the upper end of the iron brazing potential pole 10, and the second gear of the second bevel gear sets is connected with the upper end of the metal rod 9.
In a further aspect of the present invention, the horizontal plate 1 is a 1cm thick epoxy plate, and 4 wheels 2 for movement are fixed-direction wheels.
As a further scheme of the invention, a rubber pad 16 is adopted between the metal disc 8 and the metal rod 9 for insulation and isolation; the bottom of the iron chisel potential electrode 10 adopts a pointed end, so that the iron chisel potential electrode is conveniently inserted into the ground; the top end of the iron borer potential pole 10 is insulated and isolated from the driving gear set 4 by a rubber ring 17, and the metal disc potential pole 8 and the iron borer potential pole 10 are connected with a test instrument by a test wire 12.
As a further scheme of the invention, the industrial personal computer 7 and the remote controller 15 are both internally provided with wireless transmission chips and can carry out signal transmission in a long distance.
As a further scheme of the invention, the industrial personal computer 7 is internally provided with a GPS for positioning, carries out real-time positioning and calculation of moving distance in the moving process of the device, stops at equal intervals, and then places a test potential electrode.
The use method of the device for testing the ground potential gradient distribution of the transformer substation grounding grid comprises the following steps: the tester starts the device for testing the earth surface potential gradient distribution of the transformer substation grounding grid and the remote controller 15 thereof, after the industrial personal computer 7 and the remote controller 15 are wirelessly connected, the remote controller 15 is used for controlling the device for testing the earth surface potential gradient distribution of the grounding grid of the transformer substation to move at equal intervals, after the test point is reached and stays, the ground pattern collector 11 starts to take a picture and transmits the pattern to the industrial personal computer 7, after the industrial personal computer 7 identifies and analyzes the ground pattern, the corresponding motor is started to place the potential pole in place, the iron borer potential pole 10 is inserted into the non-cement hardened ground or the metal disc potential pole 8 to place the cement hardened ground, after the iron borer potential pole is placed in place, the industrial personal computer 7 sends a potential pole in-place signal to the remote controller 15, the tester then starts the test and sends a command to start the test at the next station via the remote control 15 after the test is completed.
The working principle of the invention is as follows:
as shown in figure 5, after the power supply of the device is started, the device starts to test, the controller adopts a remote controller 15, the remote controller 15 sends a control signal to an industrial personal computer 7, wireless transmission chips are arranged in the industrial personal computer 7 and the remote controller 15, the signal transmission can be carried out at a long distance, and a tester can remotely control the driving device to move the motor 3 through the remote controller 15 at a fixed test position so as to enable the device to move forwards or backwards and receive a signal for starting the test after a potential pole is placed in place.
The ground pattern collector 11 is adopted, the ground pattern can be collected and sent to the industrial personal computer 7, the industrial personal computer 7 identifies the ground pattern, and then sends commands to the corresponding driving iron rod potential pole motor 13 and the driving metal disc potential pole motor 14, so that the iron rod potential pole 10 or the metal disc potential pole 8 is placed in place, and the test can be carried out on both a cement hardened pavement and a dirt pavement when the ground surface potential gradient distribution is tested in a transformer substation. The second gear is internally polished with threads, meanwhile, the metal rod 9 and the iron rod potential pole 10 are in a threaded metal rod structure, the driving iron rod potential pole motor 13 and the driving metal disc potential pole motor 14 are vertically placed, when the driving iron rod potential pole motor 13 and the driving metal disc potential pole motor 14 are started, the first gear is driven, and then the second gear with a threaded structure is driven, when the driving iron rod potential pole motor 13 and the driving metal disc potential pole motor 14 rotate in the forward direction, the metal rod 9 or the iron rod potential pole 10 is driven to move downwards, and when the driving iron rod potential pole motor 13 and the driving metal disc potential pole motor 14 rotate in the reverse direction, the metal rod 9 or the iron rod potential pole 10 is driven to move upwards.
The specification of the distribution test of the surface potential gradient of the field area in DL/T475-: and selecting an equipment grounding down lead which is well connected with the main network as a reference point in the middle of the path of the test line, and testing the potential between the ground surface and the reference point at equal intervals (the interval is generally 1m or 2 m) from the starting point of the test line to the end point. After the industrial personal computer 7 receives the test command, the driving device moves the motor 3 to a specified position (for example, moves by 1 m), and after the device reaches the position, the iron brazing potential pole 10 or the metal disc potential pole 8 is placed in place, and the iron brazing potential pole 10 is inserted into the position 15cm below the ground or the metal disc potential pole 8 is placed on the ground for compaction. This process is controlled by its corresponding drive motor stop to whether it is in place or not.
The industrial personal computer 7 is internally provided with a GPS for positioning, can perform real-time positioning and calculate the moving distance in the moving process of the device, stays at equal intervals (1 m or 2 m), and then places a test potential pole.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes and modifications can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (7)
1. The utility model provides a transformer substation's earth's surface potential gradient distributes and tests device which characterized in that: the device comprises a horizontal plate (1), 4 movable wheels (2), a driving device movable motor (3), a power supply (5), an industrial personal computer (7), a metal disc potential pole (8), a metal rod (9), an iron rod potential pole (10), a ground pattern collector (11), a driving iron rod potential pole motor (13), a driving metal disc potential pole motor (14) and a remote controller (15);
4 moving wheels (2) are arranged below the horizontal plate (1), the 4 moving wheels (2) are connected with a driving device moving motor (3), a power supply (5) is used for supplying power, and an industrial personal computer (7), a metal disc potential pole (8), an iron rod potential pole (10) and a ground pattern collector (11) are arranged on the horizontal plate (1);
the industrial personal computer (7) is connected with a remote controller (15), the ground pattern collector (11) is connected with the industrial personal computer (7), the industrial personal computer (7) is respectively connected with a driving iron rod potential pole motor (13) and a driving metal disc potential pole motor (14), the driving iron rod potential pole motor (13) and the driving metal disc potential pole motor (14) are respectively connected with the upper end of an iron rod potential pole (10) and the upper end of a metal rod (9) through bevel gear sets (4), the lower end of the metal rod (9) is connected with a metal disc potential pole (8), and the metal disc potential pole (8) and the iron rod potential pole (10) are connected with a testing instrument.
2. The device for testing the ground surface potential gradient distribution of the transformer substation grounding grid according to claim 1, characterized in that: the two bevel gear sets (4) are respectively connected with the upper end of an iron brazing potential pole (10) and the upper end of a metal rod (9), the first bevel gear set and the second bevel gear set are identical in structure and comprise a first gear and a second gear, the first gear of the first bevel gear set is connected with a driving iron brazing potential pole motor (13), the first gear of the second bevel gear set is connected with a driving metal disc potential pole motor (14), the first gear is meshed with the second gear, threads are polished in the second gear, the second gear of the first bevel gear set is connected with the upper end of the iron brazing potential pole (10), and the second gear of the second bevel gear set is connected with the upper end of the metal rod (9).
3. The device for testing the ground surface potential gradient distribution of the transformer substation grounding grid according to claim 1, characterized in that: the horizontal plate (1) adopts an epoxy resin plate with the thickness of 1cm, and 4 wheels (2) for movement adopt wheels with fixed directions.
4. The device for testing the ground surface potential gradient distribution of the transformer substation grounding grid according to claim 1, characterized in that: the metal disc (8) and the metal rod (9) are insulated and isolated by a rubber pad (16); the bottom of the iron chisel potential electrode (10) adopts a pointed end, so that the iron chisel potential electrode is conveniently inserted into the ground; the top end of the iron borer potential pole (10) is insulated and isolated from the driving gear set (4) by a rubber ring (17), and the metal disc potential pole (8) and the iron borer potential pole (10) are connected with a test instrument by a test wire (12).
5. The device for testing the ground surface potential gradient distribution of the transformer substation grounding grid according to claim 1, characterized in that: the industrial personal computer (7) and the remote controller (15) are internally provided with wireless transmission chips, and can remotely transmit signals.
6. The device for testing the ground surface potential gradient distribution of the transformer substation grounding grid according to claim 1, characterized in that: the industrial personal computer (7) is internally provided with a GPS for positioning, and in the moving process of the device, the real-time positioning is carried out, the moving distance is calculated, the stop is carried out at equal intervals, and then a test potential electrode is placed.
7. The use method of the device for testing the ground potential gradient distribution of the transformer substation grounding grid, which is disclosed by the claims 1 to 6, is characterized by comprising the following steps: the tester starts the device for testing the earth surface potential gradient distribution of the transformer substation grounding grid and the remote controller (15) thereof, after the industrial personal computer (7) and the remote controller (15) are wirelessly connected, the remote controller (15) is used for controlling the device for testing the earth surface potential gradient distribution of the grounding grid of the transformer substation to move at equal intervals, after the ground pattern collector (11) stops at the test point, the ground pattern collector starts to take a picture and transmits the pattern to the industrial personal computer (7), the industrial personal computer (7) identifies and analyzes the ground pattern, then the corresponding motor is started to place the potential pole in place, the iron brazing potential pole (10) is inserted into the non-cement hardened ground or the metal disc potential pole (8) to place the cement hardened ground, after the iron brazing potential pole is placed in place, the industrial personal computer (7) sends a potential pole in-place signal to the remote controller (15), then the tester starts to test, and after the test is finished, the remote controller (15) sends a command to start the test of the next test point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011036376.XA CN112147464A (en) | 2020-09-27 | 2020-09-27 | Device for testing earth surface potential gradient distribution of transformer substation grounding grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011036376.XA CN112147464A (en) | 2020-09-27 | 2020-09-27 | Device for testing earth surface potential gradient distribution of transformer substation grounding grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112147464A true CN112147464A (en) | 2020-12-29 |
Family
ID=73895550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011036376.XA Pending CN112147464A (en) | 2020-09-27 | 2020-09-27 | Device for testing earth surface potential gradient distribution of transformer substation grounding grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112147464A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866038A (en) * | 2005-07-07 | 2006-11-22 | 高政 | Large-scale grounding network detection technology and detection system for power plant and transformer substation |
| CN101246199A (en) * | 2007-02-14 | 2008-08-20 | 高政 | Method and device for wirelessly detecting grounded screen fault |
| CN102944771A (en) * | 2012-10-24 | 2013-02-27 | 中国电力科学研究院 | Simulation experiment device and method of alternating current, direct current and impact performance of large earth screen |
| CN104897995A (en) * | 2015-06-10 | 2015-09-09 | 国网上海市电力公司 | Transformer station grounding network corrosion detecting system based on earth surface potential, and method thereof |
| CN107271760A (en) * | 2017-05-28 | 2017-10-20 | 西南交通大学 | Power-frequency voltage bipolar plates assessment device and method in ground |
| CN207114614U (en) * | 2017-04-19 | 2018-03-16 | 国网辽宁省电力有限公司丹东供电公司 | Grounded screen place surface potential gradiometry servicing unit |
| CN110609176A (en) * | 2019-10-24 | 2019-12-24 | 国网山东省电力公司青州市供电公司 | Ground resistance test car, remote controller and ground resistance test system |
-
2020
- 2020-09-27 CN CN202011036376.XA patent/CN112147464A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866038A (en) * | 2005-07-07 | 2006-11-22 | 高政 | Large-scale grounding network detection technology and detection system for power plant and transformer substation |
| CN101246199A (en) * | 2007-02-14 | 2008-08-20 | 高政 | Method and device for wirelessly detecting grounded screen fault |
| CN102944771A (en) * | 2012-10-24 | 2013-02-27 | 中国电力科学研究院 | Simulation experiment device and method of alternating current, direct current and impact performance of large earth screen |
| CN104897995A (en) * | 2015-06-10 | 2015-09-09 | 国网上海市电力公司 | Transformer station grounding network corrosion detecting system based on earth surface potential, and method thereof |
| CN207114614U (en) * | 2017-04-19 | 2018-03-16 | 国网辽宁省电力有限公司丹东供电公司 | Grounded screen place surface potential gradiometry servicing unit |
| CN107271760A (en) * | 2017-05-28 | 2017-10-20 | 西南交通大学 | Power-frequency voltage bipolar plates assessment device and method in ground |
| CN110609176A (en) * | 2019-10-24 | 2019-12-24 | 国网山东省电力公司青州市供电公司 | Ground resistance test car, remote controller and ground resistance test system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021217765A1 (en) | Crts iii-type track slab rapid smart precision adjustment system and precision adjustment method | |
| WO2019200905A1 (en) | Three-dimensional high-density resistivity measurement method based on electrode random distribution and exploration system | |
| CN102080348B (en) | Fine tuning system and method of nonballast track slab | |
| CN109269392B (en) | It is in electrical contact the insulating materials apparent height measuring device and method of feedback | |
| CN202323586U (en) | Automatic control system for ballastless track plate accurate adjustment equipment | |
| CN110904748A (en) | Numerical control intelligent high-speed rail track slab fine adjuster and track slab position adjusting method | |
| CN109738525A (en) | The high-speed railway bearing layer concrete velocity of wave detection device and estimation method of gridding | |
| CN112147464A (en) | Device for testing earth surface potential gradient distribution of transformer substation grounding grid | |
| CN209513400U (en) | A kind of survey area arrangement apparatus for concrete test | |
| CN111562283B (en) | Instrument for automatically measuring frost heaving deformation of full section of channel and measuring and mounting method | |
| CN202090250U (en) | Precise regulating system of ballastless track plate | |
| CN206716916U (en) | A kind of resistance detection cutter device | |
| CN106248723B (en) | The method of bitumen mixture specimen volume change when measuring induction heating | |
| CN214330523U (en) | Simple drilling device for geological mineral exploration | |
| CN207335890U (en) | It is a kind of automatically to descend temperature measurement system | |
| CN208398862U (en) | A kind of Portable dip auxiliary device | |
| CN208902053U (en) | A kind of coal mine roadway deformation monitoring device | |
| CN112924945A (en) | Underground diaphragm wall model test system based on cross-hole radar imaging | |
| CN208105020U (en) | Bridge construction stage Temporary Piers support reaction monitoring device | |
| CN207742261U (en) | reactor test device | |
| CN112428386A (en) | Intelligent vibrating trolley | |
| CN112550370A (en) | Portable multimachine multiple spot pulls switch synchronism detecting system | |
| CN108729635A (en) | A kind of electromechanical common joists detect levelling device and its application method automatically | |
| CN212031201U (en) | Device for accurately measuring resilience modulus of geotechnical material | |
| CN211104857U (en) | Automatic positioning and punching vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201229 |
|
| RJ01 | Rejection of invention patent application after publication |