CN105720390A - Grounding module and preparation method therefor - Google Patents
Grounding module and preparation method therefor Download PDFInfo
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- CN105720390A CN105720390A CN201410729394.4A CN201410729394A CN105720390A CN 105720390 A CN105720390 A CN 105720390A CN 201410729394 A CN201410729394 A CN 201410729394A CN 105720390 A CN105720390 A CN 105720390A
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- earthing module
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- graphite powder
- metal pole
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Abstract
The invention discloses a grounding module and a preparation method therefor, and belongs to the technical field of power and communication equipment. The grounding module comprises a metal pole core and a nonmetal conductive material wrapping the metal pole core. The nonmetal conductive material contains the following components by mass percentage: 10%-15% of artificial graphite powder, 45%-60% of natural scale graphite and 30%-40% of high-quality cement. The impact on the grounding module from weather is small, and the grounding module is convenient to install, is resistant to corrosion, and is reliable in performance. The invention also provides a preparation method for the grounding module, and the method comprises the steps: dosing, mixing and kneading, extruding, pressure maintaining, and maintaining. The method is easy to operate, and is low in cost.
Description
Technical field
The present invention relates to electric power and technical field of communication equipment, particularly relate to a kind of earthing module and preparation method thereof.
Background technology
System is to ensure that the critical facility of power equipment safety reliability service power ground.Grounding device is the general name of grounding body and earth lead, and its effect is that conducting lightning currents imports underground, and the protection of lightning-protection system is relevant with this to a great extent.Grounding body, also known as earthing pole, is the metallic conductor directly contacted with soil or conductor group, is divided into artificial earth electrode and natural grounding substance.Grounding body is as the earth soil close contact and provides the conductor of electrical connection between the earth, and safe diffusing thunder energy makes it leak into the earth.
Traditional grounding body mostly is metallic conductor, and modal have round steel, angle steel, steel pipe, copper rod, copper mesh etc., is constituted grounded screen with cancellated form.Metallic ground body affinity in acidity or basic soil is poor and easily occurs metal body surface corrosion to make earth resistance change, when in soil, organic substance is too much, easily form the phenomenon that metal body surface is wrapped up by ink, in addition it is many that traditional metallic ground body there is also materials, cost is high, life-span is short, the problem of poor stability, and should not use in high soil resistivity, big by seasonal effect.
Summary of the invention
Mostly being metallic conductor, cost height for tradition grounding body, floor space is big, perishable, the shortcoming that resistance is unstable, the present invention is with non-metallic conducting material and metal pole piece for raw material, it is provided that a kind of surface area is big, lightweight, corrosion-resistant, simple in construction, dependable performance is durable in use, resistance is stable, cheap earthing module and preparation method thereof.
To achieve the above object of the invention, technical scheme is as follows:
A kind of earthing module, including metal pole piece and the non-metallic conducting material wrapping up described metal pole piece, calculating by weight/mass percentage composition, described non-metallic conducting material is made up of the graphous graphite powder of 10-15%, the natural scale graphite of 45-60% and the high-mark cement of 30-40%.
Preferably, calculating by weight/mass percentage composition, described non-metallic conducting material is made up of the graphous graphite powder of 14-15%, the natural scale graphite of 45-50% and the high-mark cement of 35-40%；Calculating it is highly preferred that press weight/mass percentage composition, described non-metallic conducting material is made up of the high-mark cement of the graphous graphite powder of 15%, the natural scale graphite of 50% and 35%.
Preferably, the granularity of described graphous graphite powder is less than 0.5, and the specification of described natural scale graphite is 50 order siftage.
Preferably, the label of described high-mark cement is 525#.
Preferably, described metal pole piece is zinc-plated screw-thread steel.
The preparation method of a kind of earthing module, it is characterised in that comprise the following steps:
1) dispensing: calculate by weight/mass percentage composition, weigh the graphous graphite powder of 10-15%, the natural scale graphite of 45-60% and the high-mark cement of 30-40%；
2) kneading: the graphous graphite powder in dispensing, natural scale graphite are put in kneading pot, adds a certain amount of water, stirs 15-30 minute, adds high-mark cement and stirs 10-20 minute so that it is fully kneading is uniform；
3) extruding: the raw material that kneading is good is poured in mould, and metal pole piece is compressing；
4) pressurize: shaped article is pressurize 8-15 minute under a certain pressure；
5) demoulding maintenance: product is placed on room temperature 28 ± 1 DEG C, the humidity environment more than 80%, maintains 2-5 days, the then demoulding, lucifuge is placed.
In above-mentioned extrusion process, by effect of vibration, the air in mould is fully got rid of, fill up after cavity body of mould until raw material, portion of water in raw material is extruded and discharges, being further continued for adding raw material in mould, vibrate air-out, moisture is discharged in extruding again, then repeat this process repeatedly, obtain compressing product.
When shaped article is carried out pressurize, it is preferable that carrying out pressurize under 8-10MPa pressure, the dwell time is preferably 10 minutes.
Maintain in step in the demoulding, it is preferable that product is placed in the environment that humidity is 90%, and service time is 3 days.
For earthing module of the present invention, inventor is through repetition test, finally determine the composition of its non-metallic conducting material, namely by the graphous graphite powder of 10-15%, the natural scale graphite of 45-60% and the high-mark cement composition of 30-40%, preferably, when being 14-15% according to graphous graphite powder, natural scale graphite is 45-50%, high-mark cement is that 35-40% is when carrying out proportioning, more preferably, when being 15% according to graphous graphite powder, natural scale graphite be 50% and high-mark cement be 35% when carrying out proportioning, the combination property of the earthing module prepared is more excellent, it is that there is very strong hygroscopicity and moisture retention due to this kind of nonmetallic materials, by tide effect, module can discharge electrolytic ion to Soil structure layer, play the effect reducing earth resistance, reduce seasonal effect, make resistance energy stable for extended periods of time；In addition graphite itself has very strong corrosion resistance and stable chemical nature, is wrapped up wherein by metal pole piece, makes the decay resistance of metal pole piece strengthen, extend service life simultaneously.
Earthing module of the present invention has the advantages that
1, corrosion-resistant, nonhazardous, long service life, easy for installation.
2, can moisture-absorbing moisture-keeping, earth resistance low.
3, the earth resistance of high resistance soil can effectively be reduced.
4, earth resistance is little by seasonal effect, can stable for extended periods of time.
5, resistance to heavy current impact, resistance value portion increases.
It addition, for the preparation method of earthing module of the present invention, metal pole piece is extruded together with nonmetallic materials so that product is durable, and preparation technology is simple, it is easy to operation, with low cost, is suitable to large-scale production.
Accompanying drawing explanation
Fig. 1 is the preparation technology flow chart of the earthing module of the present invention.
Detailed description of the invention
For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, it is described in detail below in conjunction with specific embodiment.
Embodiment 1
A kind of earthing module, connect pole piece by outside non-metallic conducting material parcel built-in metal to form, by weight percentage, outside non-metallic conducting material by 15% graphous graphite powder, the natural scale graphite of 50% and the high grade electroconductive cement composition of 35%, built-in metal grounding body is the zinc-plated screw-thread steel of φ 18.
This earthing module can adopt customary preparation methods to prepare, for instance comprises the steps:
(1) dispensing: weigh by weight ratio, the granularity graphous graphite powder less than 0.5: 15%, cross the natural scale graphite that grit number is 50: 50%, 525# high-mark cement: 35%；
(2) kneading: the graphous graphite powder in dispensing, natural flake graphite and high-mark cement are put in kneading pot, adds a certain amount of water, stirs 40 minutes so that it is fully kneading is uniform；
(3) molding: be placed in mould by compound compressing, obtains blank, briquetting pressure 8MPa, pressurize 5 minutes, dries and obtain product under stock normal temperature and pressure.
The earthing module that specification is ￠ 150*800 obtained by this method, weight is 12kg after testing, and surface area is 0.4m2, the resistivity under room temperature is 0.26 Ω .m；Earthing module sample being applied 10A power current 5 times, continues 10s, every 2 minor tick 30min every time, before and after test, earthing module sample resistance change rate value is 12%；Earthing module sample applying 8/20 μ s, 1KA dash current 20 times, every minor tick 1min, before and after test, earthing module sample resistance change rate value is 9%；Earthing module sample is carried out all unbroken during mechanical strength test and disrepair phenomenon；Corrosion-resistant test result is corrosion-resistant rate is 0.006mm/.
Embodiment 2
A kind of earthing module, it is made up of outside non-metallic conducting material parcel built-in metal pole piece, by weight percentage, outside non-metallic conducting material by 10% graphous graphite powder, the natural scale graphite of 60% and the high grade electroconductive cement composition of 40%, built-in metal grounding body is the zinc-plated screw-thread steel of φ 18.
This earthing module can adopt customary preparation methods to prepare, for instance comprises the steps:
(1) dispensing: weigh by weight ratio, the granularity graphous graphite powder less than 0.5: 10%, cross the natural scale graphite that grit number is 50: 60%, 525# high-mark cement: 40%；
(2) kneading: the graphous graphite powder in dispensing, natural flake graphite and high-mark cement are put in kneading pot, adds a certain amount of water, stirs 40 minutes so that it is fully kneading is uniform；
(3) molding: be placed in mould by compound compressing, obtains blank, briquetting pressure 10MPa, pressurize 8 minutes, dries and obtain product under stock normal temperature and pressure.
The earthing module that specification is ￠ 180*800 obtained by this method, weight is 20kg after testing, and surface area is 0.5m2, the resistivity under room temperature is 0.25 Ω .m；Earthing module sample being applied 10A power current 5 times, continues 10s, every 2 minor tick 30min every time, before and after test, earthing module sample resistance change rate value is 13%；Earthing module sample applying 8/20 μ s, 1KA dash current 20 times, every minor tick 1min, before and after test, earthing module sample resistance change rate value is 8.5%；Earthing module sample is carried out all unbroken during mechanical strength test and disrepair phenomenon；Corrosion-resistant test result is corrosion-resistant rate is 0.005mm/.
Embodiment 3
The earthing module that the present embodiment provides a kind of specification to be ￠ 150*800 similarly to Example 1, is different in that this earthing module is prepared according to preparation method of the present invention, and concrete preparation method comprises the steps:
(1) dispensing: weigh by weight ratio, the granularity graphous graphite powder less than 0.5: 15%, cross the natural scale graphite that grit number is 50: 50%, 525# high-mark cement: 35%.
(2) kneading: the graphous graphite powder and natural flake graphite that prepare material are put in kneading pot, adds a certain amount of water, stirs 25 minutes；Add the high-mark cement in dispensing to stir 20 minutes so that it is fully kneading is uniform.
(3) extruding: make metal pole piece with the plating of φ 18 zinc-plated screw-thread steel, the raw material of kneading is put into mould, vibrate 5 minutes under frequency of vibration 200HZ, amplitude 1.35 condition, allows the air in mould fully discharge；Fill up after cavity body of mould until raw material, the portion of water in raw material is squeezed out.Being further continued for, to adding raw material in bucket, vibrating air-out, then extruding dewaters again, repeatedly repeats filler extruding, obtains shaped article.
(4) pressurize: by extruded product pressurize 8 minutes under 8MPa pressure.
(5) demoulding maintenance: the product after pressurize is placed on the environment of room temperature 28 ± 1 DEG C, humidity 90%, maintains 3 days, mould of then dismantling, with covered rearing with plastic film, put into storehouse, avoid the place of high temperature, direct sunlight.
The earthing module that specification is ￠ 150*800 obtained by this method, weight is 12kg after testing, and surface area is 0.4m2, the resistivity under room temperature is 0.23 Ω .m；Earthing module sample being applied 10A power current 5 times, continues 10s, every 2 minor tick 30min every time, before and after test, earthing module sample resistance change rate value is 10%；Earthing module sample applying 8/20 μ s, 1KA dash current 20 times, every minor tick 1min, before and after test, earthing module sample resistance change rate value is 8%；Earthing module sample is carried out all unbroken during mechanical strength test and disrepair phenomenon；Corrosion-resistant test result is corrosion-resistant rate is 0.005mm/.
Embodiment 4
The earthing module that the present embodiment provides a kind of specification to be ￠ 180*800 similarly to Example 2, is different in that this earthing module is prepared according to preparation method of the present invention, and concrete preparation method comprises the steps:
(1) dispensing: weigh by weight ratio, the granularity graphous graphite powder less than 0.5: 10%, cross the natural scale graphite that grit number is 50: 60%, 525# high-mark cement: 40%.
(2) kneading: the graphous graphite powder and natural flake graphite that prepare material are put in kneading pot, adds a certain amount of water, stirs 20 minutes；Add the high-mark cement in dispensing to stir 15 minutes so that it is fully kneading is uniform.
(3) extruding: make metal pole piece with the plating of φ 18 zinc-plated screw-thread steel, the raw material of kneading is put into mould, vibrate 5 minutes under frequency of vibration 200HZ, amplitude 1.35 condition, allows the air in mould fully discharge；Fill up after cavity body of mould until raw material, the portion of water in raw material is squeezed out.Being further continued for, to adding raw material in bucket, vibrating air-out, then extruding dewaters again, repeatedly repeats filler extruding, obtains shaped article.
(4) pressurize: by extruded product pressurize 10 minutes under 10MPa pressure.
(5) demoulding maintenance: the product after pressurize is placed on the environment of room temperature 28 ± 1 DEG C, humidity 90%, maintains 3 days, mould of then dismantling, with covered rearing with plastic film, put into storehouse, avoid the place of high temperature, direct sunlight.
The earthing module that specification is ￠ 180*800 obtained by this method, weight is 20kg after testing, and surface area is 0.5m2, the resistivity under room temperature is 0.24 Ω .m；Earthing module sample being applied 10A power current 5 times, continues 10s, every 2 minor tick 30min every time, before and after test, earthing module sample resistance change rate value is 11%；Earthing module sample applying 8/20 μ s, 1KA dash current 20 times, every minor tick 1min, before and after test, earthing module sample resistance change rate value is 8%；Earthing module sample is carried out all unbroken during mechanical strength test and disrepair phenomenon；Corrosion-resistant test result is corrosion-resistant rate is 0.005mm/.
The equal reference standard of performance test methods " GB/T21698-2008 bonded earth electrode technical conditions " to embodiment 1～4 earthing module, and testing result also complies with this standard.
Above example shows, the earthing module good conductivity, the corrosion resistance that prepare by proportioning raw materials of the present invention are strong, long service life；And raw material is cheap, produces simple, easy to use, can be widely used in the equipment ground of industry field, AC and DC place of working, the safety protection earths such as communications industry, power system, building system, and social economic effect is notable.
The above is the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from principle of the present invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. an earthing module, including metal pole piece and the non-metallic conducting material wrapping up described metal pole piece, it is characterized in that, calculating by weight/mass percentage composition, described non-metallic conducting material is made up of the graphous graphite powder of 10-15%, the natural scale graphite of 45-60% and the high-mark cement of 30-40%.
2. earthing module according to claim 1, it is characterised in that calculating by weight/mass percentage composition, described non-metallic conducting material is made up of the graphous graphite powder of 14-15%, the natural scale graphite of 45-50% and the high-mark cement of 35-40%.
3. earthing module according to claim 2, it is characterised in that calculating by weight/mass percentage composition, described non-metallic conducting material is made up of the high-mark cement of the graphous graphite powder of 15%, the natural scale graphite of 50% and 35%.
4. according to the arbitrary described earthing module of claim 1-3, it is characterised in that the granularity of described graphous graphite powder is less than 0.5, and described natural scale graphite is 50 order siftage.
5. according to the arbitrary described earthing module of claim 1-3, it is characterised in that the label of described high-mark cement is 525#.
6. according to the arbitrary described earthing module of claim 1-3, it is characterised in that described metal pole piece is zinc-plated screw-thread steel.
7. the preparation method of the earthing module described in claim 1, it is characterised in that comprise the following steps:
1) dispensing: described non-metallic conducting material is carried out dispensing by the composition described in claim 1；
2) kneading: the graphous graphite powder in dispensing, natural scale graphite are put in kneading pot, adds a certain amount of water, stirs 15-30 minute, adds high-mark cement and stirs 10-20 minute so that it is fully kneading is uniform；
3) extruding: the raw material that kneading is good is poured in mould, and metal pole piece is compressing；
4) pressurize: shaped article is pressurize 8-15 minute under a certain pressure；
5) demoulding maintenance: product is placed on temperature 28 ± 1 DEG C, the humidity environment more than 80%, maintains 2-5 days, the then demoulding, lucifuge is placed.
8. the preparation method of earthing module according to claim 7, it is characterized in that, in pressing steps, by effect of vibration, the air in mould is fully got rid of, fill up after cavity body of mould until raw material, portion of water in raw material is extruded and discharges, being further continued for adding raw material in mould, vibrate air-out, moisture is discharged in extruding again, then repeat this process repeatedly, finally give compressing product.
9. the preparation method of earthing module according to claim 7, it is characterised in that shaped article carries out pressurize under the pressure of 8-10MPa.
10. the preparation method of earthing module according to claim 7, it is characterised in that when product is maintained, product is place in 90% environment in humidity, and service time is 3 days.
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| CN201410729394.4A CN105720390B (en) | 2014-12-03 | 2014-12-03 | Earthing module and preparation method thereof |
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| CN201410729394.4A CN105720390B (en) | 2014-12-03 | 2014-12-03 | Earthing module and preparation method thereof |
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| CN105720390A true CN105720390A (en) | 2016-06-29 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106186871A (en) * | 2016-07-14 | 2016-12-07 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of preparation method of selfreparing earthing module |
| CN107681288A (en) * | 2017-10-10 | 2018-02-09 | 武汉昱仝科技有限公司 | A kind of moisturizing earthing module and preparation method thereof that catchments suitable for arid area |
| CN110137704A (en) * | 2019-05-30 | 2019-08-16 | 武汉明心电力科技有限公司 | A kind of novel power transmission overhead line structures earthing pole material |
| CN112079637A (en) * | 2020-09-10 | 2020-12-15 | 大连法伏安电器有限公司 | Composite grounding module and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106186871A (en) * | 2016-07-14 | 2016-12-07 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of preparation method of selfreparing earthing module |
| CN107681288A (en) * | 2017-10-10 | 2018-02-09 | 武汉昱仝科技有限公司 | A kind of moisturizing earthing module and preparation method thereof that catchments suitable for arid area |
| CN110137704A (en) * | 2019-05-30 | 2019-08-16 | 武汉明心电力科技有限公司 | A kind of novel power transmission overhead line structures earthing pole material |
| CN112079637A (en) * | 2020-09-10 | 2020-12-15 | 大连法伏安电器有限公司 | Composite grounding module and preparation method thereof |
| CN112079637B (en) * | 2020-09-10 | 2022-06-07 | 大连法伏安电器有限公司 | Composite grounding module and preparation method thereof |
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