CN111642048A - Electrostatic grounding system with interlocking control function - Google Patents
Electrostatic grounding system with interlocking control function Download PDFInfo
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- CN111642048A CN111642048A CN202010571265.2A CN202010571265A CN111642048A CN 111642048 A CN111642048 A CN 111642048A CN 202010571265 A CN202010571265 A CN 202010571265A CN 111642048 A CN111642048 A CN 111642048A
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- grounding
- clamp
- electrostatic
- grounding clamp
- control function
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- 238000000034 method Methods 0.000 claims abstract description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000003068 static effect Effects 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000006870 function Effects 0.000 description 13
- 230000005611 electricity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F3/00—Carrying-off electrostatic charges
- H05F3/02—Carrying-off electrostatic charges by means of earthing connections
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention relates to an electrostatic grounding system with an interlocking control function, which comprises: the device comprises a first grounding clamp, a second grounding clamp, a power supply, a controller, a junction box, an explosion-proof box, a current-limiting resistor and a lead; the first grounding clamp is firmly clamped on a device conductive part needing grounding, and the second grounding clamp is connected to the ground; the controller is connected with the process system; when the current value in the electrostatic grounding system exceeds a specified threshold value, the alarm lamp gives an alarm, and the controller controls the process system to stop running. The grounding system can quantitatively detect the grounding resistance value and the static current, and control and stop the process when the static current is greater than a specified threshold value, so that the grounding reliability can be guaranteed by applying the static grounding system to the production process with large static hazard, and the production safety level is obviously improved.
Description
Technical Field
The present invention relates to an electrostatic grounding system, and more particularly, to an electrostatic grounding system with interlock control function.
Background
Static electricity is generated frequently due to factors such as process operation, equipment, personnel and the like in the petrochemical production and oil storage and transportation processes, and if the static electricity cannot be effectively controlled, fire and explosion accidents are easily caused, which is disastrous to enterprises and individuals. Electrostatic grounding measures are widely used as a simple and effective method for eliminating static electricity.
However, in the prior art, (1) for an electrostatic grounding system without an interlocking control function, when the electrostatic grounding system fails, a control measure cannot be taken in time for a process, and electrostatic charges generated in the process cannot be dissipated in time, so that a large amount of electrostatic charges are accumulated to cause electrostatic discharge, and a fire explosion accident is caused. (2) To the electrostatic grounding system who has interlock control function, there are also more problems: firstly, the whole grounding system has an electrified part, but does not adopt necessary explosion-proof measures, and has larger potential safety hazard when being used in flammable and explosive places; secondly, although the grounding system has an interlocking control function, the online real-time detection of the grounding resistance value of the grounding system cannot be realized, and the regulations on the grounding resistance value of equipment in different standards are difficult to meet; thirdly, the electrostatic grounding system with the interlocking control function has a complex structure, a complex control system and a poor use effect.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention mainly aims to: an electrostatic grounding system with interlock control function is provided. The invention provides at least the following scheme based on the purpose:
an electrostatic grounding system with interlock control function, comprising: the device comprises a first grounding clamp (1), a second grounding clamp (2), a junction box (3), a controller (4), a power supply (5) and a current-limiting resistor (6); the first grounding clamp (1) is connected with the controller (4) and the power supply (5) through the junction box (3), the other end of the power supply (5) is connected with one end of the current-limiting resistor (6), and the other end of the current-limiting resistor (6) is connected with the second grounding clamp (2); the first grounding clamp (1) is also connected with the second grounding clamp (2); the first grounding clamp (1) is used for clamping on a conductive component of the equipment when the equipment needs to be grounded; the second grounding clamp (2) is used for connecting to the ground when the equipment needs to be grounded; the controller (4) is used for connecting with a process system when equipment needs to be grounded, collecting loop current formed by the first grounding clamp (1), the junction box (3), the power supply (5), the current-limiting resistor (6), the second grounding clamp (2) and the first grounding clamp (1), judging whether the loop current exceeds threshold current according to a preset program, and if so, giving an alarm and controlling the process system to stop running.
Preferably, the electrostatic grounding system with interlock control function further includes: an explosion-proof box (7); the junction box (3), the controller (4), the power supply (5) and the current limiting resistor (6) are all placed inside the explosion-proof box (7).
Preferably, the first grounding clamp (1) and the second grounding clamp (2) are the same, the upper clamp body of the first grounding clamp (1) is provided with a thimble, the lower clamp body is provided with two thimbles, and the thimble of the upper clamp body is positioned between the two thimbles of the lower clamp body when the clamp is closed.
Preferably, the first grounding clamp (1) is made of stainless steel, the thimble of the first grounding clamp (1) is a cone, and the tip of the cone can ensure good contact with an object to be grounded. .
Preferably, an insulating assembly is arranged between two thimbles of the lower clamp body in the first grounding clamp (1), and when the first grounding clamp (1) does not clamp a conductor or clamp an insulating material, the whole loop is open.
Preferably, the first grounding clamp (1) is connected with the junction box (3) and the second grounding clamp (2) through a lead (8).
Preferably, a clamping groove is formed in the joint of the first grounding clamp (1) and the lead (8), and the lead (8) is inserted into the clamping groove.
Preferably, the controller (4) comprises an alarm driving module and an alarm lamp which are connected; and the alarm driving module is used for driving the alarm lamp to respond when the controller (4) judges that the loop current exceeds the threshold current.
Preferably, the resistance value of the grounding system is not more than 100 Ω.
Preferably, the wire (8) is a copper wire coated with an insulating layer.
Compared with the prior art, the invention has at least the following beneficial effects:
(1) the invention provides an electrostatic grounding system with an interlocking control function, which is simple and convenient to operate, and can accurately judge whether equipment is grounded through the response condition of an alarm lamp by only firmly clamping a first grounding clamp on an equipment conductive part to be grounded during testing. Meanwhile, the grounding system can quantitatively detect the grounding resistance value and the loop current (static current) and control the stopping of the process when the loop current is greater than a specified threshold value, and for a production process with high electrostatic hazard, the grounding system can ensure the reliability of grounding and remarkably improve the production safety level.
(2) The arrangement mode (upper and lower) of the ejector pins in the grounding clamp is beneficial to realizing the firm combination of the grounding clamp and the grounding equipment, and meanwhile, the arrangement of the insulating component between the two ejector pins on the lower clamp body ensures that the grounding clamp can realize the successful dissipation of static charges only after being connected to the grounding equipment.
(3) The alarm driving module in the controller is connected with the alarm lamp, and the response of the alarm lamp is controlled by the program setting in the controller. Whether the conductive parts of the equipment are successfully grounded can be quickly and accurately judged by observing the response condition of the alarm lamp.
(4) The application of the explosion-proof box enables the electrostatic grounding system with the interlocking control function to be wider in application range, and the electrostatic grounding system is safe and reliable to use in flammable and explosive dangerous places.
Drawings
Fig. 1 is a schematic structural diagram of an electrostatic grounding system with an interlock control function according to the present invention.
Reference numerals: 1. the device comprises a first grounding clamp, a second grounding clamp, a junction box, a controller, a constant voltage power supply, a current-limiting resistor, a controller, a constant voltage power supply, a current-limiting resistor, a flameproof box, a wire and a circuit breaker.
Detailed Description
The present invention will be described in further detail below.
As shown in fig. 1, an electrostatic grounding system with interlock control function according to the present invention includes:
the device comprises a first grounding clamp 1, a second grounding clamp 2, a junction box 3, a controller 4, a constant voltage power supply 5, a current limiting resistor 6, an explosion-proof box 7 and a lead 8. The first grounding clamp 1 is firmly clamped on a conductive part needing grounding, the second grounding clamp 2 is connected to the ground, the junction box 3 is connected with the first grounding clamp 1 and the controller 4 through leads 8, the controller 4 is connected with a control part of a process system, the controller 4 is used for being connected with the process system when equipment needs to be grounded, collecting loop current formed by the first grounding clamp 1, the junction box 3, the power supply 5, the current limiting resistor 6, the second grounding clamp 2 and the first grounding clamp 1, judging whether the loop current exceeds threshold current according to a preset program, if yes, giving an alarm and controlling the process system to stop running to ensure safe production, and the constant voltage power supply 5 provides constant voltage for the grounding system.
In the embodiment, the first grounding clamp 1 is firmly clamped on the equipment conductive component needing grounding, and the first grounding clamp 1 is connected with the junction box 3 and the second grounding clamp 2 through the lead 8. The controller 4 is connected to the junction box 3 and can be programmed to control the operation of the process system in addition to the alarm response. The second grounding clamp 2 and the current limiting resistor 6 are connected to a grounding system, and the constant voltage power supply 5 provides constant voltage for the grounding system. The junction box 3, the controller 4, the constant voltage power supply 5 and the current limiting resistor 6 are all arranged in the explosion-proof box 7.
In the embodiment, the first grounding clamp 1, the junction box 3, the constant voltage power supply 5, the current limiting resistor 6, the second grounding clamp 2 and the first grounding clamp 1 form a closed loop, the second grounding clamp 2 is grounded, so that the conductive part of the equipment is grounded, meanwhile, the controller 4 collects the current of the closed loop, the controller 4 rapidly judges whether the current value exceeds the threshold current according to a preset program, and the processing result is displayed as the response condition of the alarm lamp. If the warning light responds, the controller will in time terminate operation of the process system. Otherwise, the process system continues to operate. It should be noted that the preset program is conventional and well known to those skilled in the art.
During testing, the first grounding clamp 1 is firmly clamped on a device conductive part needing grounding, and the safe connection between a process control part and an electrostatic grounding system is ensured. Wherein the constant voltage power supply 5 provides a constant voltage U for the grounding system, and the resistance in the grounding system is RgAssuming that the ground resistance is R0From the formula:
I0＝U/R0while R isg≤100Ω
I.e. a predetermined threshold value of the current in U/(R) can be calculatedg+R0)≤I0≤U/R0In the meantime. Before the experiment begins, the current threshold is converted into a program language and is set in the controller in advance, and if the current value of the grounding system exceeds the range in the experiment, the alarm lamp gives an alarm, and meanwhile, the controller controls the process system to stop running.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. An electrostatic grounding system with interlock control function, comprising: the device comprises a first grounding clamp (1), a second grounding clamp (2), a junction box (3), a controller (4), a power supply (5) and a current-limiting resistor (6);
the first grounding clamp (1) is connected with the controller (4) and the power supply (5) through the junction box (3), the other end of the power supply (5) is connected with one end of the current-limiting resistor (6), and the other end of the current-limiting resistor (6) is connected with the second grounding clamp (2); the first grounding clamp (1) is also connected with the second grounding clamp (2);
the first grounding clamp (1) is used for clamping on an electrostatic grounding terminal or a conductive component of the equipment when the equipment needs to be grounded;
the second grounding clamp (2) is used for connecting with a grounding system when equipment needs to be grounded;
and the controller (4) is used for collecting loop current of a loop formed by the first grounding clamp (1), the junction box (3), the power supply (5), the current limiting resistor (6) and the second grounding clamp (2) when equipment needs to be grounded, judging whether the loop current exceeds threshold current according to a preset program, and if so, giving an alarm and controlling the process system to stop running.
The power supply (5) is a constant voltage source and provides constant voltage in the using process.
2. The electrostatic grounding system with interlock control function according to claim 1, further comprising: an explosion-proof box (7); the junction box (3), the controller (4), the power supply (5) and the current limiting resistor (6) are all placed inside the explosion-proof box (7).
3. The electrostatic grounding system with interlocking control function according to claim 1, wherein the first grounding clamp (1) and the second grounding clamp (2) are the same, the upper clamp of the first grounding clamp (1) has one thimble, the lower clamp has two thimbles, and the thimble of the upper clamp is located between the two thimbles of the lower clamp when the first grounding clamp (1) is closed.
4. The electrostatic grounding system with interlocking control function according to claim 1, wherein the first grounding clamp (1) is made of stainless steel, the thimble of the first grounding clamp (1) is a cone, and the tip of the cone can ensure good contact with the grounded object.
5. The electrostatic grounding system with interlocking control function according to claim 1, characterized in that an insulating component is disposed between two pins of the lower clamp body in the first grounding clamp (1), and when the first grounding clamp (1) does not clamp a conductor or clamps an insulating material, the whole circuit is open.
6. The electrostatic grounding system with interlocking control function according to claim 1, wherein the first grounding clamp (1) is connected with the junction box (3) and the second grounding clamp (2) through wires (8).
7. The electrostatic grounding system with interlock control function according to claim 1, wherein a clamping groove is arranged at the connection position of the first grounding clamp (1) and the conducting wire (8), and the conducting wire (8) is inserted into the clamping groove.
8. The electrostatic grounding system with interlock control function according to claim 1, wherein the controller (4) comprises an alarm driving module and an alarm lamp connected together;
and the alarm driving module is used for driving the alarm lamp to respond when the controller (4) judges that the loop current exceeds the threshold current.
9. The electrostatic grounding system with interlocking control function according to claim 1, wherein the resistance value of the grounding system is not more than 100 Ω.
10. Electrostatic grounding system with interlock control according to claim 4, characterized in that said wire (8) is a copper wire coated with an insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010571265.2A CN111642048A (en) | 2020-06-22 | 2020-06-22 | Electrostatic grounding system with interlocking control function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010571265.2A CN111642048A (en) | 2020-06-22 | 2020-06-22 | Electrostatic grounding system with interlocking control function |
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| Publication Number | Publication Date |
|---|---|
| CN111642048A true CN111642048A (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010571265.2A Pending CN111642048A (en) | 2020-06-22 | 2020-06-22 | Electrostatic grounding system with interlocking control function |
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| CN (1) | CN111642048A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303498A (en) * | 2020-10-19 | 2021-02-02 | 中石化上海工程有限公司 | Active static prevention and control system for non-metal pipeline and container |
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| US20030164770A1 (en) * | 2000-07-29 | 2003-09-04 | Edge Ian James | Electrical resistance monitoring device |
| JP2007147903A (en) * | 2005-11-25 | 2007-06-14 | Sharp Corp | Static electricity warning device for display panel and manufacturing method for display panel using the same |
| JP6134412B1 (en) * | 2016-03-18 | 2017-05-24 | 日本システム開発株式会社 | Grounding device with detection device and clip device |
| CN208352535U (en) * | 2018-04-20 | 2019-01-08 | 四川高能电气有限公司 | A kind of safety relief high-voltage discharging rod |
-
2020
- 2020-06-22 CN CN202010571265.2A patent/CN111642048A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030164770A1 (en) * | 2000-07-29 | 2003-09-04 | Edge Ian James | Electrical resistance monitoring device |
| JP2007147903A (en) * | 2005-11-25 | 2007-06-14 | Sharp Corp | Static electricity warning device for display panel and manufacturing method for display panel using the same |
| JP6134412B1 (en) * | 2016-03-18 | 2017-05-24 | 日本システム開発株式会社 | Grounding device with detection device and clip device |
| CN208352535U (en) * | 2018-04-20 | 2019-01-08 | 四川高能电气有限公司 | A kind of safety relief high-voltage discharging rod |
Non-Patent Citations (1)
| Title |
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| 王良旺等: "储罐充装柴油与白油过程的静电实验", 《化工进展》 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112303498A (en) * | 2020-10-19 | 2021-02-02 | 中石化上海工程有限公司 | Active static prevention and control system for non-metal pipeline and container |
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Application publication date: 20200908 |