阅读说明：本技术 一种静电接地装置及其控制方法 (Electrostatic grounding device and control method thereof ) 是由 陆腾蛟 吴凡 施慧 其他发明人请求不公开姓名 于 2020-06-01 设计创作，主要内容包括：本发明涉及静电释放消除领域,特别是一种静电接地装置及其控制方法。其特征是：至少包括继电器、控制模块1、电阻检测模块1、两个相互绝缘的接地电极,其中一个接地电极串联所述继电器接地线构成接地回路,所述两个相互绝缘的接地电极和其接触的导体构成接触回路,电阻检测模块1对所述接触回路的电阻进行检测获得检测值r1,如果检测值r1小于等于设定电阻值R1则由控制模块1驱动继电器使其导通,实现其中一个接地电极接通地线,确保该接地电极和地线之间的接地回路的电阻小于等于设定电阻值R1。有益效果是：在静电物体和接地装置稳定接触后才由防爆继电器导通接地,实现接地全过程的本质安全操作,用于防爆区域的电气接地装置。(The invention relates to the field of static discharge elimination, in particular to a static grounding device and a control method thereof. The method is characterized in that: the resistance detection module 1 detects the resistance of the contact loop to obtain a detection value R1, if the detection value R1 is smaller than or equal to a set resistance value R1, the control module 1 drives the relay to be conducted, one of the grounding electrodes is connected with the ground wire, and the resistance of the grounding loop between the grounding electrode and the ground wire is ensured to be smaller than or equal to a set resistance value R1. The beneficial effects are that: the explosion-proof relay is conducted to ground after the static object is stably contacted with the grounding device, so that the intrinsic safety operation of the whole grounding process is realized, and the grounding device is used for an electric grounding device in an explosion-proof area.)

1. An electrostatic grounding device, characterized by: the resistance detection module 1 detects the resistance of the contact loop to obtain a detection value R1, if the detection value R1 is smaller than or equal to a set resistance value R1, the control module 1 drives the relay to be conducted, one of the grounding electrodes is connected with the ground wire, and the resistance of the grounding loop between the grounding electrode and the ground wire is ensured to be smaller than or equal to a set resistance value R1.

2. An electrostatic grounding device, characterized by: the device at least comprises a double-path relay, a control module 1, a resistance detection module 2, two grounding electrodes 1 and 2 which are insulated from each other, wherein the grounding electrode 1 is connected in series with one path of grounding wire a pile of the relay to form a grounding loop, the grounding electrode 2 is connected in series with the other path of grounding wire b pile of the relay through the resistance detection module 2, the grounding electrode 1, the resistance detection module 1 and the grounding electrode 2 form a contact loop, the grounding electrode 1, one path of the double-path relay, the grounding wire a pile, the grounding wire b pile, the other path of the double-path relay, the resistance detection module 2 and the grounding electrode 2 form a grounding detection loop, the resistance detection module 1 detects the resistance of the contact loop to obtain a detection value R1, and if the detection value R1 is less than or equal to a set, the grounding electrode 1 is connected with the ground wire, and the resistance detection module 2 detects the resistance of the grounding loop to obtain a detection value and provides the detection value to the control module 1 for monitoring the grounding resistance of the grounding loop and providing an alarm function.

3. An electrostatic grounding device as claimed in claim 1 or 2, wherein: the electrostatic grounding device is an electrostatic grounding clamp, and the grounding electrode is a grounding tooth of the electrostatic grounding clamp.

4. An electrostatic grounding device as claimed in claim 1 or 2, wherein: the electrostatic grounding device is a fixed electrostatic grounding box, and two mutually insulated grounding teeth of the electrostatic clamp 1 are used as grounding electrodes to be connected to an internal circuit of the electrostatic grounding box.

5. An electrostatic grounding device, characterized by: the electrostatic grounding device is a movable electrostatic grounding box, two mutually insulated grounding teeth 1 and 2 of an electrostatic clamp 1 are used as grounding electrodes and connected to an internal circuit of the electrostatic grounding box, two mutually insulated grounding teeth 3 and 4 of the electrostatic clamp 2 are used as grounding electrodes and connected to the internal circuit of the electrostatic grounding box, the electrostatic grounding box at least comprises a double-path relay, a control module 1, a resistance detection module 2, a control module 2, a resistance detection module 3 and an AND gate module, the grounding teeth 1, the resistance detection module 1 and the grounding teeth 2 form a contact loop 1 of the electrostatic clamp 1, the resistance detection module 1 detects the resistance of the contact loop 1 to obtain a detection value R1, if the detection value R1 is smaller than or equal to a set resistance value R1, the control module 1 sends a switch-on driving signal to the input end of the AND gate module 1, the grounding tooth 3, the resistance detection module 3 and the grounding tooth 4 form a contact loop 2 of the electrostatic clamp 2, the resistance detection module 3 detects the resistance of the contact loop 2 to obtain a detection value r2, if the detected value R2 is less than or equal to the set resistance value R1, the control module 2 sends an on driving signal to the input end 2 of the AND gate module, when the two input ends of the AND gate obtain the connection driving signal, the output end of the AND gate module drives the two-way relay to be connected, when the contact resistance of the contact loop 1 and the contact resistance of the contact loop 2 are both smaller than or equal to the set resistance value R1, the two-way relay is conducted to conduct the grounding teeth of the electrostatic clamp 1 and the grounding teeth of the electrostatic clamp 2 to realize the grounding loop, and the resistance detection module 2 detects the resistance of the grounding loop to obtain a detection value and provides the detection value to the control module 1 for monitoring the grounding resistance of the grounding loop and providing an alarm function.

6. An electrostatic grounding device as claimed in claim 5, wherein: and at least one input end of the AND gate module is provided with a photoelectric coupler.

7. A control method of an electrostatic grounding device is characterized by comprising the following steps:

(1) detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

(2) judging the resistance value, if R1 is larger than the set resistance value R1, returning to the step (1) and emitting a poor contact red R display; if R1 is less than or equal to the set resistance R1, executing the step (3);

(3) delay time t;

(4) and the driving relay is conducted.

8. A control method of an electrostatic grounding device is characterized by comprising the following steps:

(1) detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

(2) judging the resistance value, if R1 is larger than the set resistance value R1, returning to the step (1) and emitting a poor contact red R display; if R1 is less than or equal to the set resistance R1, executing the step (3);

(3) delay time t;

(4) the driving relay is conducted;

(5) detecting the resistance of the grounding loop to obtain a resistance r 2;

(6) judging the resistance value, if R2 is larger than the set resistance value R2, returning to the step (5) and emitting poor contact red R display; if R2 is less than or equal to the set resistance R2, a safe grounding display G is performed.

9. A control method of an electrostatic grounding device is characterized by comprising the following steps:

(1) detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

(2) judging the resistance value, if R1 is larger than the set resistance value R1, returning to the step (1) and emitting a poor contact red R display; if R1 is less than or equal to the set resistance R1, executing the step (3);

(3) detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

(4) judging the resistance value, and if R1 is larger than the set resistance value R1, returning to the step (1); if R1 is less than or equal to the set resistance R1, executing the step (5);

(5) and the driving relay is conducted.

10. A control method of an electrostatic grounding device is characterized by comprising the following steps:

(1) detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

(2) judging the resistance value, if R1 is larger than the set resistance value R1, returning to the step (1) and emitting a poor contact red R display; if R1 is less than or equal to the set resistance R1, executing the step (3);

(3) detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

(4) judging the resistance value, and if R1 is larger than the set resistance value R1, returning to the step (1); if R1 is less than or equal to the set resistance R1, executing the step (5);

(5) the driving relay is conducted;

(6) detecting the resistance of the grounding loop to obtain a resistance r 2;

(7) judging the resistance value, if R2 is larger than the set resistance value R2, returning to the step (6) and emitting poor contact red R display; if R2 is less than or equal to the set resistance R2, the display of green G is safely grounded.

Technical Field

The invention relates to the technical field of static discharge elimination, in particular to a static grounding device and a control method thereof.

Background

At present, an electrostatic grounding device applied to explosion-proof places such as petroleum and petrochemical places is provided with electrostatic grounding clamps and an electrostatic grounding box (divided into a fixed type and a movable type), and the electrostatic grounding device transfers and releases static electricity so as to avoid the harm of the static electricity. The existence of static electricity is divided into two situations, one is that the original object carries static electricity (such as the static electricity generated by friction between wheels and the ground and a tank truck), the other is static electricity generated in real time (such as the static electricity generated by friction between oil and pipelines during oil loading and unloading), the situation that the original object carries the static electricity can generate meshing contact discharge sparks when an electrostatic grounding clamp is used, the situation that the static electricity generated in real time can also generate contact discharge sparks if the grounding is disconnected, and the situation is dangerous in an explosion-proof dangerous place 0 area.

Disclosure of Invention

The intrinsic safety is derived from the GB 3836.4-201 standard, explosion-proof electrical appliances are classified into explosion-proof type, safety-increasing type, intrinsic safety type and the like, and the intrinsic safety type electrical equipment is characterized in that all circuits are intrinsic safety circuits, namely, the circuits cannot ignite specified explosive mixtures due to electric sparks and thermal effects generated under normal work or specified fault states. That is, the electric appliance is not explosion-proof by the outer shell and the filler, but the energy of electric spark or heat effect generated by the circuit in normal use or failure is less than 0.28mJ, namely the gas concentration is 8.5% (the most explosive concentration) of the minimum ignition energy.

The device can be divided into an electrostatic grounding clamp, a fixed electrostatic grounding box and a movable electrostatic grounding box, and the circuit can be an analog circuit (a functional module circuit) or a singlechip circuit (a program control circuit).

The invention aims to conduct and ground by the explosion-proof relay after the static object is stably contacted with the grounding device (the contact resistance is smaller than a set value), so that static sparks cannot be generated when the static object is contacted with the grounding device, and the conduction of the explosion-proof relay is explosion-proof (explosion-proof or intrinsic safety type), so the invention can realize the intrinsic safety operation of the whole grounding process.

The technical scheme of the invention is as follows:

an electrostatic grounding device, characterized by: the resistance detection module 1 detects the resistance of the contact loop to obtain a detection value R1, if the detection value R1 is smaller than or equal to a set resistance value R1, the control module 1 drives the relay to be conducted, one of the grounding electrodes is connected with the ground wire, and the resistance of the grounding loop between the grounding electrode and the ground wire is ensured to be smaller than or equal to a set resistance value R1.

An electrostatic grounding device, characterized by: the device at least comprises a double-path relay, a control module 1, a resistance detection module 2, two grounding electrodes 1 and 2 which are insulated from each other, wherein the grounding electrode 1 is connected in series with one path of grounding wire a pile of the relay to form a grounding loop, the grounding electrode 2 is connected in series with the other path of grounding wire b pile of the relay through the resistance detection module 2, the grounding electrode 1, the resistance detection module 1 and the grounding electrode 2 form a contact loop, the grounding electrode 1, one path of the double-path relay, the grounding wire a pile, the grounding wire b pile, the other path of the double-path relay, the resistance detection module 2 and the grounding electrode 2 form a grounding detection loop, the resistance detection module 1 detects the resistance of the contact loop to obtain a detection value R1, and if the detection value R1 is less than or equal to a set, the grounding electrode 1 is connected with the ground wire, and the resistance detection module 2 detects the resistance of the grounding loop to obtain a detection value and provides the detection value to the control module 1 for monitoring the grounding resistance of the grounding loop and providing an alarm function.

The electrostatic grounding device is characterized in that: the electrostatic grounding device is an electrostatic grounding clamp, and the grounding electrode is a grounding tooth of the electrostatic grounding clamp.

The electrostatic grounding device is characterized in that: the electrostatic grounding device is a fixed electrostatic grounding box, and two mutually insulated grounding teeth of the electrostatic clamp 1 are used as grounding electrodes to be connected to an internal circuit of the electrostatic grounding box.

An electrostatic grounding device, characterized by: the electrostatic grounding device is a movable electrostatic grounding box, two mutually insulated grounding teeth 1 and 2 of an electrostatic clamp 1 are used as grounding electrodes and connected to an internal circuit of the electrostatic grounding box, two mutually insulated grounding teeth 3 and 4 of the electrostatic clamp 2 are used as grounding electrodes and connected to the internal circuit of the electrostatic grounding box, the electrostatic grounding box at least comprises a double-path relay, a control module 1, a resistance detection module 2, a control module 2, a resistance detection module 3 and an AND gate module, the grounding teeth 1, the resistance detection module 1 and the grounding teeth 2 form a contact loop 1 of the electrostatic clamp 1, the resistance detection module 1 detects the resistance of the contact loop 1 to obtain a detection value R1, if the detection value R1 is smaller than or equal to a set resistance value R1, the control module 1 sends a switch-on driving signal to the input end of the AND gate module 1, the grounding tooth 3, the resistance detection module 3 and the grounding tooth 4 form a contact loop 2 of the electrostatic clamp 2, the resistance detection module 3 detects the resistance of the contact loop 2 to obtain a detection value r2, if the detected value R2 is less than or equal to the set resistance value R1, the control module 2 sends an on driving signal to the input end 2 of the AND gate module, when the two input ends of the AND gate obtain the connection driving signal, the output end of the AND gate module drives the two-way relay to be connected, when the contact resistance of the contact loop 1 and the contact resistance of the contact loop 2 are both smaller than or equal to the set resistance value R1, the two-way relay is conducted to conduct the grounding teeth of the electrostatic clamp 1 and the grounding teeth of the electrostatic clamp 2 to realize the grounding loop, and the resistance detection module 2 detects the resistance of the grounding loop to obtain a detection value and provides the detection value to the control module 1 for monitoring the grounding resistance of the grounding loop and providing an alarm function.

The electrostatic grounding device is characterized in that: and at least one input end of the AND gate module is provided with a photoelectric coupler.

The electrostatic grounding device is characterized in that: the relay is an explosion-proof relay.

The electrostatic grounding device is characterized in that: the relay is sealed by an explosion-proof cover.

The electrostatic grounding device is characterized in that: the relay is a solid state relay.

The electrostatic grounding device is characterized in that: the relay is a magnetic reed tube relay, and the magnetic reed tube is filled with withstand voltage insulating oil.

The electrostatic grounding device is characterized in that: the indicating lamp is arranged for contact loop resistance alarm or/and grounding loop resistance alarm.

The electrostatic grounding device is characterized in that: the buzzer is arranged for contact loop resistance alarm or/and grounding loop resistance alarm.

The electrostatic grounding device is characterized in that: the resistance value R1 was set to 50 Ω.

A control method of an electrostatic grounding device is characterized by comprising the following steps:

(1) detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

(2) judging the resistance value, if R1 is larger than the set resistance value R1, returning to the step (1) and emitting a poor contact red R display; if R1 is less than or equal to the set resistance R1, executing the step (3);

(3) delay time t;

(4) and the driving relay is conducted.

A control method of an electrostatic grounding device is characterized by comprising the following steps:

(1) detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

(2) judging the resistance value, if R1 is larger than the set resistance value R1, returning to the step (1) and emitting a poor contact red R display; if R1 is less than or equal to the set resistance R1, executing the step (3);

(3) delay time t;

(4) the driving relay is conducted;

(5) detecting the resistance of the grounding loop to obtain a resistance r 2;

(6) judging the resistance value, if R2 is larger than the set resistance value R2, returning to the step (5) and emitting poor contact red R display; if R2 is less than or equal to the set resistance R2, a safe grounding display G is performed.

The control method of the electrostatic grounding device is characterized by further comprising the following steps: (5) and (6) continuously repeating the steps to carry out dynamic grounding detection.

The control method of the electrostatic grounding device is characterized in that: t is more than 0 and less than or equal to 5 seconds.

A control method of an electrostatic grounding device is characterized by comprising the following steps:

(1) detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

(2) judging the resistance value, if R1 is larger than the set resistance value R1, returning to the step (1) and emitting a poor contact red R display; if R1 is less than or equal to the set resistance R1, executing the step (3);

(3) detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

(4) judging the resistance value, and if R1 is larger than the set resistance value R1, returning to the step (1); if R1 is less than or equal to the set resistance R1, executing the step (5);

(5) and the driving relay is conducted.

A control method of an electrostatic grounding device is characterized by comprising the following steps:

(1) detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

(2) judging the resistance value, if R1 is larger than the set resistance value R1, returning to the step (1) and emitting a poor contact red R display; if R1 is less than or equal to the set resistance R1, executing the step (3);

(3) detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

(4) judging the resistance value, and if R1 is larger than the set resistance value R1, returning to the step (1); if R1 is less than or equal to the set resistance R1, executing the step (5);

(5) the driving relay is conducted;

(6) detecting the resistance of the grounding loop to obtain a resistance r 2;

(7) judging the resistance value, if R2 is larger than the set resistance value R2, returning to the step (6) and emitting poor contact red R display; if R2 is less than or equal to the set resistance R2, the display of green G is safely grounded.

The control method of the electrostatic grounding device is characterized by further comprising the following steps: and (6) continuously repeating the step (6) to the step (7) to carry out dynamic grounding detection.

The control method of the electrostatic grounding device is characterized by further comprising the following steps: the steps (1) to (2) can be repeated for a plurality of times.

The invention has the beneficial effects that: the explosion-proof relay is conducted to the ground after the electrostatic object is stably contacted with the grounding device (the contact resistance is smaller than a set value), so that electrostatic sparks cannot be generated when the electrostatic object is contacted with the grounding device, and the explosion-proof relay is conducted to the explosion-proof relay (explosion-proof or intrinsic safety type), so that the invention can realize the intrinsic safety operation of the whole grounding process and further provide on-off indication and alarm. Of course, the electrostatic grounding device of the present invention can also be applied to an electrical grounding device of an explosion-proof area.

Drawings

Fig. 1 shows an embodiment of the electrostatic grounding clamp of the present invention (contact loop resistance detection).

Fig. 2 shows an embodiment of the stationary electrostatic grounding box (contact loop resistance detection) of the present invention.

FIG. 3 is a flow diagram of the FIG. 1, FIG. 2 embodiment of the present invention.

Fig. 4 shows another embodiment of the electrostatic grounding clamp (contact loop resistance detection, ground loop resistance detection) according to the present invention.

Fig. 5 shows another embodiment of the stationary electrostatic grounding box of the present invention (contact loop resistance detection, ground loop resistance detection).

Fig. 6 is a flow chart of the fig. 4, fig. 5 embodiment of the present invention (time delay scheme).

Figure 7 is a schematic view of a portable electrostatic grounding box embodiment of the present invention.

Fig. 8 is an embodiment of the mobile electrostatic grounding box of the present invention provided with a photocoupler.

FIG. 9 is a flow chart of a secondary detection scheme according to the embodiment of FIGS. 1 and 2 of the present invention.

FIG. 10 is a flow chart of a secondary detection scheme according to the embodiment of FIGS. 4 and 5.

In the figure: 101 tong arms, 102 tong clamping lips, 103 grounding teeth, 104 grounding teeth, 105 grounding teeth, 106 grounding teeth, 107 tong clamping lips, 108 resistance detection modules 1, 109 control modules 1, 110 single-path relays, 111 tong arms, 112 tong springs, 201 boxes, 202 grounding teeth, 203 grounding teeth, 204 traditional electrostatic grounding tongs, 401 double-path relays, 402 resistance detection modules 2, 701 resistance detection modules 3, 702 control modules 2, 704 grounding teeth, 705 grounding teeth, 706 traditional electrostatic grounding tongs, 801 photocouplers and 802 photocouplers.

Detailed Description

Fig. 1 shows an embodiment of the electrostatic grounding clamp (contact loop resistance detection) of the present invention, which includes a clamp arm 101, a clamp lip 102, a grounding tooth 103, a grounding tooth 104, a grounding tooth 105, a grounding tooth 106, a clamp lip 107, a resistance detection module 108, a control module 109, a one-way relay 110, a clamp arm 111, and a clamp body spring 112, wherein any two of the grounding tooth 103, the grounding tooth 104, the grounding tooth 105, and the grounding tooth 106 are selected as conductive loops, and in the figure, the grounding tooth 105 and the grounding tooth 106 are selected as conductive contact loops (i.e. forming a contact loop with a meshing conductor), the grounding tooth 105 and the grounding tooth 106 are insulated from each other, the grounding tooth 105, the resistance detection module 108, and the grounding tooth 106 form a contact loop, the resistance detection module 108 detects the resistance of the contact loop to obtain a detection value r1, the grounding tooth 106, the one-way relay 110, and a pile of a grounding wire form a grounding loop, and when the electrostatic grounding clamp meshes with, if R1 is not more than the set resistance value R1, the control module 109 drives the one-way relay 110 to conduct (the ends of the first and the second are conducted) to realize that the grounding tooth 106 is connected with the ground wire, and if the grounding path is credible, the resistance of the grounding loop between the grounding tooth and the ground wire of the electrostatic grounding clamp can be ensured to be less than the set resistance value R1. In the process, the grounding teeth of the electrostatic grounding clamp firstly engage with the conductor, and the relay 110 is switched on under the condition of ensuring good contact, so that electric sparks are prevented from being generated by the electrostatic grounding clamp at the moment of engaging with the conductor, and the relay can be an explosion-proof relay, or a sealed explosion-proof relay with a grounding clamp arm, or a solid relay. An alarm buzzer H, a red light emitting tube D1 and a green light emitting tube D2 are arranged, and the control module 109 outputs an alarm signal according to a large detection result of the resistance detection module 108: if R1 is less than or equal to the set resistance R1, D2 is bright green, if R1 is more than the set resistance R1, D1 is bright red and an alarm buzzer H emits an alarm sound spectrum. In order to ensure that the electrostatic grounding clamp can act after stably engaging the conductor, the relay can adopt a time delay relay or a program control circuit.

Fig. 2 is an embodiment (contact loop resistance detection) of the fixed electrostatic grounding box of the present invention, which is a variation of the embodiment of fig. 1, the resistance detection module 108, the control module 109, and the one-way relay 110 are disposed in the box 201, the box 201 can be made into a sealed explosion-proof type, 204 is a conventional electrostatic grounding clamp (i.e., an electrostatic clamp), 202, 203 are two grounding teeth insulated from each other, the grounding tooth 202, the resistance detection module 108, and the grounding tooth 203 constitute a contact loop, the resistance detection module 108 detects the resistance of the contact loop to obtain a detection value R1, the grounding tooth 202, the one-way relay 110, and a ground wire pile constitute a ground loop, when the electrostatic grounding clamp bites a conductor, the bitted conductor is located between the grounding tooth 202 and the grounding tooth 203, i.e., the bitted conductor is located in a conductive loop of the contact loop, if R1 is not more than a set resistance value R1, the control module 109 drives the one-way relay 110 to be conducted (first end and second end are conducted), the grounding teeth 202 are connected to the ground wire, and if the grounding path is authentic, the resistance of the grounding circuit between the grounding teeth of the electrostatic grounding clamp and the ground wire is ensured to be smaller than the set resistance value R1. In the process, the grounding teeth of the electrostatic grounding clamp firstly engage with the conductor, and the relay 110 is switched on under the condition of ensuring good contact, so that electric sparks are prevented from being generated by the electrostatic grounding clamp in the moment of engaging with the conductor, the relay can be an explosion-proof relay, or a sealed explosion-proof relay, or a grounding clamp arm sealed explosion-proof relay, or a solid relay, and the relay can adopt a time delay relay in consideration of stable engagement of the electrostatic grounding clamp, and certainly, the time delay function can also be realized through a circuit or a program. An alarm buzzer H, a red light emitting tube D1 and a green light emitting tube D2 are arranged, and the control module 109 outputs an alarm signal according to a large detection result of the resistance detection module 108: if R1 is less than or equal to the set resistance R1, D2 is bright green, if R1 is more than the set resistance R1, D1 is bright red and an alarm buzzer H emits an alarm sound spectrum.

FIG. 3 is a flow chart of the embodiment of FIG. 1 and FIG. 2 of the present invention, comprising the steps of:

301. detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

302. judging the resistance value, if R1 is larger than the set resistance value R1, returning to the step 301 and emitting poor contact red R display; if R1 is less than or equal to the set resistance R1, executing step 303;

303. the time t is delayed, and the time t is selected to be more than 0 and less than or equal to 5 seconds in consideration of the stable occlusion of the electrostatic grounding clamp;

304. the relay is driven to be conducted.

Fig. 9 is a flow chart of a secondary detection scheme of the embodiment of fig. 1 and 2, in view of stable engagement of the electrostatic grounding clamp, the flow chart of fig. 3 adopts a scheme of relay time delay conduction, and fig. 9 adopts a secondary detection scheme, and certainly, multiple times, namely at least secondary detection can be performed. The method comprises the following steps:

901. detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

902. judging the resistance value, if R1 is larger than the set resistance value R1, returning to the step 301 and emitting poor contact red R display; if R1 is less than or equal to the set resistance R1, then 903 is executed;

903. detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

904. judging the resistance value, and if R1 is greater than the set resistance value R1, returning to the step 901; if R1 is less than or equal to the set resistance R1, then step 905 is executed;

905. the relay is driven to be conducted.

Of course, the steps of 901, 902 may be repeated multiple times.

Fig. 4 shows another embodiment of the electrostatic grounding clamp (contact loop resistance detection, ground loop resistance detection) of the present invention, which adds ground loop resistance detection and alarm on the basis of the embodiment of fig. 1, and includes a clamp arm 101, a clamp lip 102, a ground tooth 103, a ground tooth 104, a ground tooth 105, a ground tooth 106, a clamp lip 107, a resistance detection module 108, a control module 109, a two-way relay 401, a resistance detection module 402, a clamp arm 111, and a clamp body spring 112, where the a-pile and the b-pile are two different position points of the same ground wire pile, any two of the ground tooth 103, the ground tooth 104, the ground tooth 105, and the ground tooth 106 are selected as conductive contact loops, and in the figure, the ground tooth 105 and the ground tooth 106 are selected as conductive contact loops (i.e., contact loops are formed with the snap conductor), and the ground tooth 105 and the ground tooth 106 are insulated from each other, and the ground tooth 105 and the ground tooth 106, The resistance detection module 108 and the grounding tooth 106 form a contact loop, the resistance detection module 108 detects the resistance of the contact loop to obtain a detection value R1, the grounding loop is formed by the grounding tooth 106, the second end and the first end of the two-way relay 401 and the grounding wire a pile, the grounding loop is formed by the grounding tooth 106, the second end and the first end of the two-way relay 401, the grounding wire a pile, the grounding wire b pile, the third end and the fourth end of the two-way relay 401, the resistance detection module 402 and the grounding tooth 105, the resistance detection module 402 detects the resistance of the grounding loop to obtain a detection value R2, when the electrostatic grounding clamp bites the conductor, the bitted conductor is positioned between the grounding tooth 105 and the grounding tooth 106, namely the bitted conductor is positioned in a conductive loop of the contact loop, if R1 is not more than a set resistance value R1, the control module 109 drives the two-way relay 401 to be conducted (the first end and the second end are conducted, the third end and the fourth end are conducted, the first end and the second end are conducted to realize that the grounding tooth 106 is connected with the ground wire, firstly, the resistance between the grounding tooth and the meshed conductor of the electrostatic grounding clamp is ensured to be smaller than a set resistance value R1, in the process, the grounding tooth of the electrostatic grounding clamp firstly meshes with the conductor, and the relay 401 is conducted under the condition of ensuring good contact, so that electric sparks generated by the electrostatic grounding clamp at the moment of meshing the conductor are avoided, the relay can be an explosion-proof relay or a sealed explosion-proof relay or a grounding clamp arm sealed explosion-proof relay or a solid relay, the relay can be a time delay relay in consideration of stable meshing of the electrostatic grounding clamp, and the time delay function can be realized through a circuit or a program. An alarm buzzer H, a red light emitting tube D1 and a green light emitting tube D2 are arranged, and the control module 109 outputs an alarm signal according to the detection result of the resistance detection module 108: if R1 is less than or equal to the set resistance R1, D2 is bright green, if R1 is more than the set resistance R1, D1 is bright red and an alarm buzzer H emits an alarm sound spectrum. After the third end and the fourth end of the two-way relay 401 are conducted, the resistance detection module 402 detects the resistance of the grounding loop to obtain a detection value R2, if R2 is not more than a set resistance value R2, the control module 109 drives the green light emitting tube D4 to display safe grounding, and if R2 is more than a set resistance value R2, the control module 109 drives the red light emitting tube D3 to display poor grounding and the alarm buzzer H sends an alarm sound spectrum.

Fig. 5 is another embodiment (contact loop resistance detection, ground loop resistance detection) of the fixed electrostatic grounding box of the present invention, which adds ground loop resistance detection and alarm on the basis of the embodiment of fig. 2, the resistance detection module 108, the control module 109, and the two-way relay 401 are disposed in the box 201, the box 201 can be made as a sealed explosion-proof type, 204 is a conventional electrostatic grounding clamp (i.e., an electrostatic clamp), 202, 203 are two mutually insulated grounding teeth thereof, the grounding tooth 202, the resistance detection module 108, and the grounding tooth 203 form a contact loop (i.e., a contact loop with the meshing conductor), the resistance detection module 108 detects the resistance of the contact loop to obtain a detection value r1, the grounding tooth 202, the second end and the first end of the two-way relay 401, and the pile of the grounding wire a form a grounding loop, when the grounding clamp meshes the conductor, the meshed conductor is positioned at the grounding tooth 202, Between the grounding teeth 203, namely the engaged conductor is in a conductive loop of a contact loop, if R1 is not more than a set resistance value R1, the control module 109 drives the two-way relay 401 to be conducted (the ends are conducted ), the ends are conducted to realize that the grounding teeth 202 are communicated with the ground wire, firstly, the resistance between the grounding teeth of the electrostatic grounding clamp and the engaged conductor is ensured to be less than the set resistance value R1, in this process, the grounding teeth of the electrostatic grounding clamp first engage the conductor, the relay 401 is only turned on in circumstances where good contact is ensured, thus avoiding the electric spark generated by the electrostatic grounding clamp at the moment of occluding the conductor, the relay can be an explosion-proof relay, or sealed explosion suppression, or sealed explosion suppression by the grounding clamp arm, or a solid relay, and considering the stable occlusion of the electrostatic grounding clamp, the relay can adopt a delay relay, and certainly, the delay function can also be realized by a circuit or a program. An alarm buzzer H, a red light emitting tube D1 and a green light emitting tube D2 are arranged, and the control module 109 outputs an alarm signal according to a large detection result of the resistance detection module 108: if R1 is less than or equal to the set resistance R1, D2 is bright green, if R1 is more than the set resistance R1, D1 is bright red and an alarm buzzer H emits an alarm sound spectrum. The grounding detection loop is formed by the grounding tooth 202, the ends II and III of the two-way relay 401, the grounding wire a pile, the grounding wire b pile, the ends III and IV of the two-way relay 401, the resistance detection module 402 and the grounding tooth 203, the resistance detection module 402 detects the resistance of the grounding loop after the ends III and IV of the two-way relay 401 are conducted to obtain a detection value R2, if R2 is not more than a set resistance value R2, the control module 109 drives the green light emitting tube D4 to display safe grounding, and if R2 is more than the set resistance value R2, the control module 109 drives the red light emitting tube D3 to display poor grounding and the alarm buzzer H to send an alarm sound spectrum.

Fig. 6 is a flow chart of the embodiment of fig. 4 and 5 of the present invention (time delay scheme), including the steps of:

601. detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

602. judging the resistance value, if R1 is larger than the set resistance value R1, returning to the step 601 and sending out a poor contact red R display; if R1 is less than or equal to the set resistance R1, then step 603 is executed;

603. the time t is delayed, and the time t is selected to be more than 0 and less than or equal to 5 seconds in consideration of the stable occlusion of the electrostatic grounding clamp;

604. driving the relay to be conducted;

605. detecting the resistance of the ground loop to obtain a resistance r 2;

606. judging the resistance value, if R2 is larger than the set resistance value R2, returning to the step 605 and emitting poor contact red R display; if R2 is less than or equal to the set resistance R2, the display of green G is safely grounded.

605-606 are repeated continuously to perform dynamic ground detection.

Fig. 10 is a flow chart of a secondary detection scheme of the embodiment of fig. 4 and 5, in view of stable engagement of the electrostatic grounding clamp, the flow chart of fig. 6 adopts a scheme of relay time delay conduction, and fig. 10 adopts a secondary detection scheme, and certainly, multiple times, namely at least secondary detection can be performed. The method comprises the following steps:

1001. detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

1002. judging the resistance value, if R1 is larger than the set resistance value R1, returning to the step 1001 and emitting a poor contact red R display; if R1 is less than or equal to the set resistance R1, then go to step 1003;

1003. detecting the resistance of the grounding tooth contact loop to obtain a resistance value r 1;

1004. judging the resistance value, if R1 is larger than the set resistance value R1, returning to the step 1001; if R1 is less than or equal to the set resistance R1, 1005 is executed;

1005. driving the relay to be conducted;

1006. detecting the resistance of the ground loop to obtain a resistance r 2;

1007. judging the resistance value, if R2 is larger than the set resistance value R2, returning to the step 1006 and emitting poor contact red R display; if R2 is less than or equal to the set resistance R2, the display of green G is safely grounded.

Of course, the steps of 1001, 1002 may be repeated multiple times.

1006-1007 steps are repeated continuously to perform dynamic ground detection.

Fig. 7 is an embodiment of the mobile electrostatic grounding box of the present invention, which is substantially the fixed grounding end of the fixed electrostatic grounding box shown in fig. 2 is changed to be connected by an electrostatic clamp 706, that is, the fixed grounding end is composed of an electrostatic clamp 204 contact loop, an electrostatic clamp 706 contact loop, and a grounding loop after the electrostatic clamps 204 and 706 are conducted, a control module 702, a resistance detection module 701 and an electrostatic clamp 706 are further arranged on the basis of the embodiment of fig. 2, the electrostatic clamp 706 is provided with grounding teeth 704 and 705 which are insulated from each other, a meshing contact loop of the electrostatic clamp 706 is composed of the grounding teeth 704, the resistance detection module 701 and the grounding teeth 705, the resistance detection module 701 detects the resistance of the contact loop to obtain a detected value r3, when the electrostatic clamp 706 meshes a conductor, the meshed conductor is located between the grounding teeth 704 and the grounding teeth 705, that is located in a conductive loop of the meshing contact loop of the electrostatic clamp 706, if R3 is less than or equal to the set resistance value R1, the control module 702 outputs a switch-on signal, in this embodiment, an and gate 703 is provided, two input terminals of the and gate 703 are respectively connected to signal output terminals of the control module 109 and the control module 702, an output terminal of the and gate 703 is connected to the two-way relay 401, and only the control module 109 and the control module 702 output switch-on signals and the output terminal of the and gate drive the two-way relay 401 to operate and conduct, so that it is ensured that the ground circuit is conducted only after the electrostatic clamp 204 and the electrostatic clamp 706 are respectively and stably and safely connected to the conductor, and the possibility of electrostatic spark generation when any one end of the electrostatic clamp 204 and the electrostatic clamp 706. The control module 702 controls the red light tube D5, the green light tube D6 and the honey device H1 to realize the state alarm of the electrostatic clamp 706: the D6 emits green light G to indicate that the contact loop resistance of the electrostatic clamp 706 meshed with the conductor meets the set requirement, the D5 emits red light R to indicate that the contact loop resistance of the electrostatic clamp 706 meshed with the conductor is larger than the set value, and meanwhile, the buzzer H1 emits an alarm sound spectrum 1.

The ground loop of the embodiment of fig. 7 is a loop formed by the conductive connection of the two-way relay 401 between the electrostatic clamp 204 and the electrostatic clamp 706, that is, after the two-way relay 401 is conducted, the ground loop is formed by the ground tooth 202, the end of the two-way relay 401 and the ground tooth 705, the ground detection loop is formed by the ground tooth 203, the resistance detection module 402, the end of the two-way relay 401 and the ground tooth 704, and the control module 109 performs the ground loop detection through the resistance detection module 402.

Fig. 8 shows an embodiment of the mobile electrostatic grounding box of the present invention with a photocoupler, in which, considering that the electrostatic clamp 204 and the electrostatic clamp 706 respectively engage with the ground wire and the discharged electrostatic conductor, the electrostatic voltage of the discharged electrostatic conductor to the ground may be very high (several kilovolts to several tens of thousands volts), and the breakdown voltage of a common circuit is generally lower than 1000 volts, the photocouplers 801 and 802 are provided, only one photocoupler may be provided, or two photocouplers may be provided, that is, at least one photocoupler is provided at the input end of the and gate 703, and the photocoupler performs photoelectric isolation on the circuit related to the electrostatic clamp 204 and the circuit related to the electrostatic clamp 706, thereby avoiding the electrostatic high voltage breakdown detection and control circuit.

Because the static voltage is usually thousands to tens of thousands of volts, the relay of the invention should choose the relay with higher withstand voltage, here provide a kind of oil-immersed reed switch relay, because two electric contacts of the reed switch are located in the enclosed space, belong to the explosion-proof device, even the electric contact of the reed switch produces the electric spark and will not transmit to the external world, so it is the explosion-proof device of this safety. In addition, considering the pressure resistance of the reed switch, a vacuum reed switch can be adopted and the gap between the electrodes is enlarged, and alternatively, the reed switch can be filled with insulating pressure-resistant oil to form an oil-immersed reed switch (see specifically patent application 2020103348286, namely an oil-immersed reed switch), for example, transformer oil is adopted, the electric strength of the transformer oil can reach more than 4000kV/cm, the components of the transformer oil mainly comprise naphthene, alkane and aromatic hydrocarbon, and the relative dielectric constant of the transformer oil is between 2.2 and 2.4. The oil-immersed reed switch has the characteristic of delaying opening or closing, and for the scheme, even if a delay circuit or a program is not arranged, the delay closing of the normally-open reed switch is beneficial to realizing the delay effect of the scheme (namely, the reed switch is conducted after the grounding tooth and the conductor are stably connected).

According to the electrostatic grounding specification, the grounding resistance is required to be less than 100 Ω, and in the embodiments of fig. 1 and 2 of the present invention, it is assumed that the grounding teeth are all reliably connected except the grounding teeth, and the grounding teeth contact resistance is required to be less than 100 Ω; in the embodiments of fig. 4 and 5 of the present invention, the resistance of the ground path is considered, and the ground path and the ground tooth path are connected in series, so that the resistance of the ground path is required to be less than 50 Ω, and the resistance of the ground tooth path is required to be less than 50 Ω. Therefore, the set values of R1 and R2 can be set to be 50 omega. Of course, the resistance values of the resistors in the present invention can be understood as recommended values, and the protection scope of the present application is not necessarily limited, and is specifically executed according to the standard reference of the related industry.

The circuit of the invention can be powered by a battery to meet the requirement of intrinsic safety.

The above application modes and rules do not limit the basic features of the method and application of the present invention, and do not limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.