CN111564707B - Explosion-proof type static grounding clamp capable of safely releasing human body static electricity - Google Patents
Explosion-proof type static grounding clamp capable of safely releasing human body static electricity Download PDFInfo
- Publication number
- CN111564707B CN111564707B CN202010334835.6A CN202010334835A CN111564707B CN 111564707 B CN111564707 B CN 111564707B CN 202010334835 A CN202010334835 A CN 202010334835A CN 111564707 B CN111564707 B CN 111564707B
- Authority
- CN
- China
- Prior art keywords
- reed switch
- normally open
- permanent magnet
- clamp
- grounding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
- H01H36/0006—Permanent magnet actuating reed switches
- H01H36/0013—Permanent magnet actuating reed switches characterised by the co-operation between reed switch and permanent magnet; Magnetic circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
- H01R13/7031—Shorting, shunting or bussing of different terminals interrupted or effected on engagement of coupling part, e.g. for ESD protection, line continuity
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
- H01R13/7036—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part the switch being in series with coupling part, e.g. dead coupling, explosion proof coupling
-
- 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
Landscapes
- Surgical Instruments (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
The invention relates to the technical field of static electricity discharge elimination, in particular to an explosion-proof type static electricity grounding clamp for safely discharging human static electricity. The method is characterized in that: the normally closed reed switch is characterized in that grounding teeth are arranged in the jaw, the grounding teeth are connected with a normally closed reed switch, the normally closed reed switch is composed of a normally closed reed switch, a permanent magnet and an elastic piece, the normally closed reed switch and the permanent magnet are close to each other under the elastic force of the elastic piece and are in an open circuit state in the opening state of the jaw, the normally closed reed switch is bridged between the grounding teeth and the ground wire, when the jaw is meshed with a conductor, the normally closed reed switch and the grounding teeth are closed along with the fact that the normally closed reed switch is far away from the permanent magnet, and the conductor is conducted with the ground wire. The beneficial effects are that: when the electrostatic grounding clamp is used, electrostatic electric sparks are not generated, human static electricity is further safely released, and electric shock feeling is not generated to people in the human static electricity releasing process.
Description
Technical Field
The invention relates to the technical field of static electricity discharge elimination, in particular to an explosion-proof type static electricity grounding clamp for safely discharging human static electricity.
Background
At present, the static grounding tongs comprise a grounding tooth mouth, a tong body spring, a tong arm and the like, when a fully loaded oil tank car unloads oil, static carried by the oil tank car (the oil tank car generally has a ground capacitance of about 1500PF, and the static generated by the friction between wheels and the ground has about 2-3 KV) is contacted with the conventional grounding tongs, and an electric arc generated at the moment of meshing of the grounding tooth mouth can cause harm in an explosion area. CN200810123358.8 discloses an explosion-proof electrostatic grounding clamp applying a vacuum reed pipe: including the pincers body, pincers body large spring installs on the pincers body, and the characteristic is: the insulating sheath is sleeved on the plier body, the small springs are arranged in the plier opening shell, the permanent magnet steel is arranged between the small springs, the vacuum reed pipe is arranged in the insulating part, the insulating part is arranged in the plier body and is fastened with the plier body by the fixing bolt, the insulating gasket between the fixing bolt and the plier body is arranged in the plier body, and the plier opening toothed plate is arranged on the plier opening shell. The device of the patent (CN 200810123358.8) with a vacuum reed switch on a jaw is defined as an explosion-proof jaw clamp, the explosion-proof jaw clamp is composed of a normally open reed switch, a small spring and a permanent magnet, and when the jaw is occluded with a conductor, the small spring is compressed by the elasticity of a clamp body spring to enable the permanent magnet to approach the normally open reed switch to be closed and conducted.
Although the CN200810123358.8 patent solves the problem of electric arc that may be generated when the electrostatic grounding clamp is grounded, the safety of the explosion-proof electrostatic grounding clamp can be ensured only by safely releasing the human body static electricity in real time during operation, considering that the human body is also charged with static electricity.
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.
Although the CN200810123358.8 patent solves the electric arc that may be generated when the electrostatic grounding clamp is grounded, considering that human body still carries static electricity during operation, even though the grounding clamp is intrinsically safe, people still may generate electric spark to generate unsafe hidden trouble during operation in an explosion-proof environment, so the real-time safe release of human body static electricity during operation can ensure the intrinsic safety of the explosion-proof electrostatic grounding clamp.
Because two electric contacts of the reed switch are positioned in the closed space and belong to an explosion-proof device, electric sparks generated by the electric contacts of the reed switch cannot be transmitted to the outside, so that the reed switch is an intrinsic safety explosion-proof device, and further, the outer wall of the reed switch can be made of nonmagnetic materials, such as an aluminum pipe, so that the explosion-proof effect is better.
The technical scheme of the invention is as follows:
the utility model provides an explosion-proof type static ground connection pincers of human static of safe release, includes tong arm, pincers body spring, keeps silent, has ground connection tooth, characterized by in keeping silent: the jaw is also provided with a normally open reed switch, a small spring and a permanent magnet, the normally open reed switch is bridged between the grounding tooth and the ground wire, the normally open reed switch and the permanent magnet are supported by the small spring and are far away from each other to enable the normally open reed switch to be in an open circuit state when the jaw is in an open state, when the jaw is meshed with the conductor, the permanent magnet and the grounding tooth are close to the normally open reed switch in a follow-up manner to enable the normally open reed switch to be closed, and at the moment, the conductor is conducted with the ground wire;
and when the forceps arms of the electrostatic grounding forceps are held by hands until the jaws are opened, the hand-touch electrode and the grounding electrode are certainly contacted and conducted by overcoming the elastic force, so that the hand-touch electrode is grounded to release human body static electricity.
The utility model provides an explosion-proof type static ground connection pincers of human static of safe release, includes tong arm, pincers body spring, keeps silent, has ground connection tooth, characterized by in keeping silent: the jaw is also provided with a normally open reed switch, a small spring and a permanent magnet, the normally open reed switch is bridged between the grounding tooth and the ground wire, the normally open reed switch and the permanent magnet are supported by the small spring and are far away from each other to enable the normally open reed switch to be in an open circuit state when the jaw is in an open state, when the jaw is meshed with the conductor, the permanent magnet and the grounding tooth are close to the normally open reed switch in a follow-up manner to enable the normally open reed switch to be closed, and at the moment, the conductor is conducted with the ground wire;
at least one of the forceps arms is provided with a hand touch electrode and a pressure switch, the pressure switch is bridged between the hand touch electrode and the ground wire, the hand touch electrode is attached to a pressure handle of the pressure switch, the touch pressure of the pressure switch is smaller than the elastic force of a forceps body spring, and when the forceps arms of the electrostatic grounding forceps are held by hands until the forceps jaws are opened, the holding force of the hands inevitably overcomes the touch pressure to close and conduct the pressure switch, so that the hand touch electrode is grounded to release the static electricity of a human body.
The utility model provides an explosion-proof type static ground connection pincers of human static of safe release, includes tong arm, pincers body spring, keeps silent, has ground connection tooth, characterized by in keeping silent: the jaw is also provided with a normally open reed switch, a small spring and a permanent magnet, the normally open reed switch is bridged between the grounding tooth and the ground wire, the normally open reed switch and the permanent magnet are supported by the small spring and are far away from each other to enable the normally open reed switch to be in an open circuit state when the jaw is in an open state, when the jaw is meshed with the conductor, the permanent magnet and the grounding tooth are close to the normally open reed switch in a follow-up manner to enable the normally open reed switch to be closed, and at the moment, the conductor is conducted with the ground wire;
at least one of the forceps arms is provided with a hand touch electrode and a pressure switch, the pressure switch is bridged between the hand touch electrode and the ground wire, the hand touch electrode and a pressure handle of the pressure switch are kept separated or in zero pressure contact by elasticity, the resultant force of the sum of the elasticity and the touch pressure of the pressure switch is smaller than the elasticity of a forceps body spring, when the forceps arms of the electrostatic grounding forceps are held by hands until the jaws are opened, the holding force of the hands overcomes the resultant force to close and conduct the pressure switch, and the hand touch electrode is grounded to release the static electricity of a human body.
The explosion-proof type static ground clamp for safely releasing the static electricity of the human body is characterized in that: the pressure switch is hermetically wrapped in the elastic cavity 1.
The utility model provides an explosion-proof type static ground connection pincers of human static of safe release, includes tong arm, pincers body spring, keeps silent, has ground connection tooth, characterized by in keeping silent: the jaw is also provided with a normally open reed switch, a small spring and a permanent magnet, the normally open reed switch is bridged between the grounding tooth and the ground wire, the normally open reed switch and the permanent magnet are supported by the small spring and are far away from each other to enable the normally open reed switch to be in an open circuit state when the jaw is in an open state, when the jaw is meshed with the conductor, the permanent magnet and the grounding tooth are close to the normally open reed switch in a follow-up manner to enable the normally open reed switch to be closed, and at the moment, the conductor is conducted with the ground wire;
the hand-touch electrode, the permanent magnet 1 and the normally open reed pipe 1 are arranged on at least one forceps arm, the hand-touch electrode and the permanent magnet 1 are mounted together and can follow up, the permanent magnet 1 and the normally open reed pipe 1 are kept separated by elasticity to be open, the elasticity is smaller than the elasticity of a forceps body spring, when the forceps arm of the electrostatic grounding forceps is held by a hand until a forceps jaw is opened, the permanent magnet 1 is inevitably close to the normally open reed pipe 1 to be conducted, and the hand-touch electrode is grounded to release human static electricity.
The utility model provides an explosion-proof type static ground connection pincers of human static of safe release, includes tong arm, pincers body spring, keeps silent, has ground connection tooth, characterized by in keeping silent: the jaw is also provided with a normally open reed switch, a small spring and a permanent magnet, the normally open reed switch is bridged between the grounding tooth and the ground wire, the normally open reed switch and the permanent magnet are supported by the small spring and are far away from each other to enable the normally open reed switch to be in an open circuit state when the jaw is in an open state, when the jaw is meshed with the conductor, the permanent magnet and the grounding tooth are close to the normally open reed switch in a follow-up manner to enable the normally open reed switch to be closed, and at the moment, the conductor is conducted with the ground wire;
at least one forceps arm is provided with a hand touch electrode, a permanent magnet 1 and a normally closed reed pipe, the hand touch electrode and the permanent magnet 1 are installed together and can follow up, the permanent magnet 1 and the normally closed reed pipe are kept close to each other by elasticity to be open, the elasticity is smaller than the elasticity of a forceps body spring, when the forceps arm of the electrostatic grounding forceps is held by a hand until a forceps jaw is opened, the permanent magnet 1 is necessarily away from the elasticity and the normally closed reed pipe to be conducted, and the grounding of the hand touch electrode is realized to release the static electricity of a human body.
The explosion-proof type static ground clamp for safely releasing the static electricity of the human body is characterized in that: the mounting positions of the reed switch and the permanent magnet can be interchanged.
The explosion-proof type static ground clamp for safely releasing the static electricity of the human body is characterized in that: the normally open reed switch is connected with the resistor R1 in parallel, and pre-discharges the conductor in the process that the electrostatic grounding clamp bites the conductor.
Further, the range of resistance R1: 1 mega ohm to 1000 mega ohm.
The explosion-proof type static ground clamp for safely releasing the static electricity of the human body is characterized in that: the clamp arms are wrapped with elastic cavities, and the elastic force is provided by the elastic cavities.
The explosion-proof type static ground clamp for safely releasing the static electricity of the human body is characterized in that: the elastic cavity is made of sub-conductor material, and the resistance value R of the elastic cavity is larger than the resistance value R of the elastic cavity.
The explosion-proof type static ground clamp for safely releasing the static electricity of the human body is characterized in that: the elastic cavity is made of conductive rubber, and the resistance value R of the elastic cavity is larger than the resistance value R of the elastic cavity.
The explosion-proof type static ground clamp for safely releasing the static electricity of the human body is characterized in that: the hand touch electrode is coupled to the jawarms by a spring, the spring being provided by the spring.
The explosion-proof type static ground clamp for safely releasing the static electricity of the human body is characterized in that: and a resistor R is arranged to be bridged between the hand contact electrode and the ground wire, and when the hand contacts the clamp arm of the electrostatic grounding clamp, the resistor R is used for pre-discharging the static electricity of the human body, and the resistance value is R.
The explosion-proof type static ground clamp for safely releasing the static electricity of the human body is characterized in that: the resistance value R is: 10 megohm-1000 megohm.
The invention has the beneficial effects that: when the electrostatic grounding clamp is used, electrostatic electric sparks are not generated, further, the static electricity of a human body can be safely released in the operation process, and the human body does not have electric shock feeling in the static electricity releasing process.
Drawings
Fig. 1 is an embodiment of the clamp arm provided with electrode contacts for safely discharging human static electricity.
Fig. 2 is an embodiment of the clamp arm provided with a pressure switch for safely releasing human static electricity.
Fig. 3 is an embodiment of the forceps arm provided with a normally open reed switch for safely releasing human static electricity.
Fig. 4 is an embodiment of arranging a normally closed reed switch for the forceps arm to safely discharge human static electricity.
Fig. 5 shows the design of the hand electrode coupled to the jawarms via the resilient members.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 shows an embodiment of a clamp arm with electrode contacts for safely releasing human static electricity, the electrostatic grounding clamp includes a clamp arm 101, a clamp arm 105, a clamp lip 103, a clamp body spring 102, and an explosion-proof clamp jaw 104, the explosion-proof clamp jaw 104 is a design structure of CN200810123358.8 patent (the present case defines that the clamp jaw of the patent (CN 200810123358.8) is provided with an explosion-proof clamp jaw, which is composed of a normally open dry reed pipe, a small spring, and a permanent magnet, the small spring is compressed by the elastic force of the clamp body spring when the clamp jaw bites a conductor to make the permanent magnet approach the normally open dry reed pipe to make it close and conduct, the explosion-proof clamp jaw 104 is provided with a permanent magnet 202, a small spring 203, and a normally open dry reed pipe 204, because the elastic force of the clamp body spring 102 is greater than that of the small spring 203, the small spring 203 is compressed by the elastic force of the clamp body spring 102 when the clamp jaw bites the conductor to make the permanent magnet 202 approach the normally open dry reed pipe 204 to make it close and conduct, the explosion-proof clamp jaw 104 is provided with grounding teeth 201, the normally open reed pipe 204 is bridged between the grounding teeth 201 and the ground wire, in the opening state of the jaw, the normally open reed pipe 204 and the permanent magnet 202 are far away from each other to be in an open circuit state under the elastic force of the small spring 203, when the jaw bites the conductor, the permanent magnet 202 and the grounding teeth 201 follow up to be close to the normally open reed pipe 204 to be closed, at the moment, the conductor is conducted with the ground wire, and the installation positions of the permanent magnet 202 and the normally open reed pipe 204 can be interchanged. The elastic cavity 1051 is arranged or wrapped on at least one tong arm of the electrostatic grounding tong, the hand touch electrode 301 is arranged on the elastic cavity 1051, the grounding electrode 302 is arranged in the elastic cavity 1051, the hand touch electrode 301 and the grounding electrode 302 are kept separated by the elastic force F of the elastic cavity 1051, the elastic force F is smaller than the elastic force F of a tong body spring, when the tong arm of the electrostatic grounding tong is held by a hand until a tong mouth is opened, the hand touch electrode 301 is certainly contacted and conducted with the grounding electrode 302 by overcoming the elastic force F, the grounding of the hand touch electrode 301 is realized, the static electricity of a human body is released, and the elastic cavity 1051 has a sealing function, so the hand touch electrode 301 and the grounding electrode 302 are sealed in the elastic cavity 1051 even if sparks are generated, and the explosion-proof clamp is provided. Considering the electrostatic grounding concept, the leakage resistance is 10 megohm-1000 megohm, and actually, the resistance of several megohms is equivalent to direct grounding (zero resistance grounding easily generates electrostatic spark), a resistor R can be set to bridge between the hand touch electrode 301 and the ground wire, and the resistance value is: 10 megohm-1000 megohm. When a hand holds the clamp arm of the electrostatic grounding clamp, the electrostatic pre-release is carried out through the hand touch electrode 301 and the resistor R, 70% of human body voltage can be pre-released in about 3 seconds according to an RC discharge curve, the human body capacitance is generally 200pF, the human body resistance is 10 kilo ohm, the resistance value of the resistor R is 330 mega ohm, the electrostatic pre-release is basically completed after 3 seconds according to the RC curve, meanwhile, no touch inductance is generated on the human body, the residual voltage is less than 100 volts, when the clamp arm of the electrostatic grounding clamp is held by the hand until a clamp jaw is opened, the hand touch electrode 301 and the grounding electrode 302 are inevitably contacted and conducted by overcoming the elastic force f, the human body is directly grounded to release the residual voltage, the residual voltage is very low, the touch inductance cannot be generated on the human body, meanwhile, the low residual voltage release is intrinsically safe (the energy is less than 0.28 mJ), namely, even if the elastic cavity 1051 is not sealed, the electrostatic pre-release is intrinsically safe.
In addition, as an implementation scheme, the elastic cavity 1051 is made of a sub-conductor material, such as conductive rubber or plastic, and the ground resistance of the sub-conductor material is 10 mega ohm to 1000 mega ohm.
In addition, since the breakdown voltage of air is about 3kv/mm, it is desirable to design the distance between the hand touch electrode 301 and the ground electrode 302 to be greater than 3mm in most cases.
Fig. 2 shows an embodiment of the electrostatic grounding clamp with a pressure switch arranged on the clamp arm for safely releasing human static electricity, the electrostatic grounding clamp comprises a clamp arm 101, a clamp arm 105, a clamp lip 103, a clamp body spring 102, an explosion-proof clamp jaw 104, the explosion-proof clamp jaw 104 is the design structure of the CN200810123358.8 patent, a permanent magnet 202, a small spring 203 and a normally open reed pipe 204 are arranged in the explosion-proof clamp jaw 104, because the elastic force of the clamp body spring 102 is greater than that of the small spring 203, when the clamp jaws bite the conductor, the small spring 203 is compressed by the elastic force of the clamp body spring 102 to make the permanent magnet 202 approach the normally open reed pipe 204 to make it close and conduct, the explosion-proof clamp jaw 104 is provided with a grounding tooth 201, the normally open reed pipe 204 bridges between the grounding tooth 201 and the ground wire, in an open state, the normally open reed pipe 204 and the permanent magnet 202 are kept away from each other under the elastic force of the small spring 203 to be in an open state, when the clamp jaws bite the conductor, the permanent magnet 202 and the grounding tooth 201 follow to approach the normally open reed pipe 204 to make it close, at this time, the conductor is conducted with the ground, and the installation positions of the permanent magnet 202 and the normally open reed pipe 204 can be interchanged. An elastic cavity 1051 is arranged or wrapped on at least one forceps arm of the electrostatic grounding forceps, a hand touch electrode 301 is arranged on the elastic cavity 1051, a pressure switch K is arranged in the elastic cavity 1051, the pressure switch is triggered and conducted by pressure exerted on a pressure handle, the trigger pressure is set to be F1, the pressure switch K is bridged between the hand touch electrode 301 and a ground wire, the hand touch electrode 301 and the pressure handle of the pressure switch are kept away or in zero pressure contact by the elastic force F of the elastic cavity 1051, the resultant force of the sum of the elastic force F + the trigger pressure F1 is smaller than the elastic force F of a forceps body spring, when the forceps arms of the electrostatic grounding forceps are manually operated until the jaws are opened, the resultant force of the sum of the elastic force F + the trigger pressure F1 is overcome by the hand touch electrode 301, the pressure switch K is closed and conducted, and the hand touch electrode 301 is grounded to release static electricity of a human body. Further, pressure switch K is wrapped up by sealed elasticity cavity 3000, constitutes flame-proof type pressure switch like this. Considering the electrostatic grounding concept, the leakage resistance is 10 megohm-1000 megohm, and actually, the resistance of several megohms is equivalent to direct grounding (zero resistance grounding easily generates electrostatic spark), a resistor R can be set to bridge between the hand touch electrode 301 and the ground wire, and the resistance value is: 10 megohm-1000 megohm. When a hand holds the clamp arm of the electrostatic grounding clamp, the electrostatic pre-release is carried out through the hand touch electrode 301 and the resistor R, 70% of human body voltage can be pre-released in about 3 seconds according to an RC discharge curve, the human body capacitance is generally 200pF, the human body resistance is 10 kilo ohm, the resistance value of the resistor R is 330 mega ohm, the electrostatic pre-release is basically completed after 3 seconds according to the RC curve, meanwhile, no touch inductance is generated on the human body, the residual voltage is less than 100 volts, when the clamp arm of the electrostatic grounding clamp is held by the hand until a clamp jaw is opened, the pressure switch is necessarily closed and conducted, the human body is directly grounded to release the residual voltage, the residual voltage is very low, no touch inductance is generated on the human body, meanwhile, the low residual voltage release is intrinsically safe (the energy is less than 0.28 mJ), namely, even if the elastic cavity 1051 is not sealed, and the elastic cavity 3000 is not provided.
Alternatively, as an embodiment, the reset can be achieved by directly using the touch pressure f1 of the pressure spring, i.e. the hand touch electrode 301 is directly attached to the pressure handle of the pressure switch, and then the sexual cavity 1051 can be removed.
In addition, as an implementation scheme, the elastic cavity 1051 is made of a sub-conductor material, such as conductive rubber or plastic, and the ground resistance of the sub-conductor material is 10 mega ohm to 1000 mega ohm.
Fig. 3 shows an embodiment of a forceps arm provided with a normally open reed switch for safely releasing human static electricity, an electrostatic grounding forceps comprises a forceps arm 101, a forceps arm 105, a jaw clamping lip 103, a forceps body spring 102, an explosion-proof jaw clamp 104, the explosion-proof jaw clamp 104 is the design structure of the CN200810123358.8 patent, a permanent magnet 202, a small spring 203, and a normally open reed switch 204 are arranged in the explosion-proof jaw clamp 104, since the elastic force of the forceps body spring 102 is greater than that of the small spring 203, when the jaws bite a conductor, the small spring 203 is compressed by the elastic force of the forceps body spring 102 to make the permanent magnet 202 approach the normally open reed switch 204 to make it close and conduct, a grounding jumper 201 is arranged on the explosion-proof jaw clamp 104, the normally open reed switch 204 is between the grounding tooth 201 and the ground wire, in the open state of the jaws, the normally open reed switch 204 and the permanent magnet 202 are kept away from each other to be in the open state under the elastic force of the small spring 203, when the jaws bite a conductor, the permanent magnet 202 and the grounding tooth, at this time, the conductor is conducted with the ground, and the installation positions of the permanent magnet 202 and the normally open reed pipe 204 can be interchanged. An elastic cavity 1051 is arranged or wrapped on at least one forceps arm of the electrostatic grounding forceps, a hand touch electrode 301 is arranged on the elastic cavity 1051, a permanent magnet 401 is arranged on the elastic cavity 1051, a normally open reed pipe 402 is arranged in the elastic cavity 1051, the hand touch electrode 301 and the permanent magnet 401 are mounted together and can follow up, the permanent magnet 401 and the normally open reed pipe 402 are kept separated by the elastic force F of the elastic cavity 1051 to be open, the elastic force F is smaller than the elastic force F of a forceps body spring, when the forceps arm of the electrostatic grounding forceps is held by hand until a forceps jaw is opened, the permanent magnet 401 is necessarily close to the normally open reed pipe 402 to be conducted, and the hand touch electrode 301 is grounded to release human static electricity. Here, the caliper arm 101 is covered with an insulating material to prevent the human body from being directly grounded. Considering the electrostatic grounding concept, the leakage resistance is 10 megohm-1000 megohm, and actually, the resistance of several megohms is equivalent to direct grounding (zero resistance grounding easily generates electrostatic spark), a resistor R can be set to bridge between the hand touch electrode 301 and the ground wire, and the resistance value is: 10 megohm-1000 megohm. When a clamp arm of the electrostatic grounding clamp is held by a hand, electrostatic pre-release is carried out through a hand touch electrode 301 and a resistor R, 70% of human body voltage can be pre-released in about 3 seconds according to an RC discharge curve, the human body capacitance is generally 200pF, the human body resistance is 10 kilo-ohm, the resistance value of the resistor R is 330 mega-ohm, electrostatic pre-release is basically completed after 3 seconds according to the RC curve, meanwhile, no touch inductance is generated on a human body, the residual voltage is less than 100 volts, when the clamp arm of the electrostatic grounding clamp is held by the hand until a clamp jaw is opened, a permanent magnet 401 is inevitably close to a normally open reed 402 to close and conduct the normally open reed 402, the human body is directly grounded to release the residual voltage, the residual voltage is very low, and no touch inductance is generated on the human body.
Considering that the permanent magnet 401 and the normally open reed pipe 402 constitute a proximity switch, the installation positions of the permanent magnet 401 and the normally open reed pipe 402 can be interchanged.
In addition, as an implementation scheme, the elastic cavity 1051 is made of a sub-conductor material, such as conductive rubber or plastic, and the ground resistance of the sub-conductor material is 10 mega ohm to 1000 mega ohm.
Fig. 4 is an embodiment of providing a normally closed dry reed pipe for a forceps arm to safely discharge human static electricity, considering that a proximity switch may also be implemented by the normally closed dry reed pipe, an elastic cavity 1051 is provided or wrapped on at least one forceps arm of an electrostatic grounding forceps, a hand touch electrode 301 is provided on the elastic cavity 1051, a permanent magnet 401 is fixedly provided in the elastic cavity 1051 through a connecting part 4022, a normally closed dry reed pipe 4021 is further provided in the elastic cavity 1051, the hand touch electrode 301 and the permanent magnet 401 are connected together through the connecting part 4022 and can follow up, the permanent magnet 401 and the normally closed dry reed pipe 4021 are kept close to each other by an elastic force F of 1051 and are open, the elastic force F is smaller than an elastic force F of a forceps body spring, when the forceps arm of the electrostatic grounding forceps is held by a hand until a forceps jaw is opened, the permanent magnet 401 is necessarily far away from the normally closed dry reed pipe to conduct, and the hand touch electrode 301 is grounded to discharge human static electricity. Here, the caliper arm 101 is covered with an insulating material to prevent the human body from being directly grounded. Considering the electrostatic grounding concept, the leakage resistance is 10 megohm-1000 megohm, and actually, the resistance of several megohms is equivalent to direct grounding (zero resistance grounding easily generates electrostatic spark), a resistor R can be set to bridge between the hand touch electrode 301 and the ground wire, and the resistance value is: 10 megohm-1000 megohm. When a clamp arm of the electrostatic grounding clamp is held by a hand, electrostatic pre-release is carried out through a hand touch electrode 301 and a resistor R, 70% of human body voltage can be pre-released in about 3 seconds according to an RC discharge curve, a human body capacitor is generally 200pF, a human body resistor is 10 kilo-ohm, a resistor R is taken as 330 mega-ohm, electrostatic pre-release is basically completed after 3 seconds according to the RC curve, meanwhile, no touch inductance is generated on a human body, the residual voltage is less than 100 volts, when the clamp arm of the electrostatic grounding clamp is held by the hand until a clamp jaw is opened, a permanent magnet 401 is inevitably far away from a normally closed reed 4021 to close and conduct the normally closed reed 4021, the human body is directly grounded to release the residual voltage, the residual voltage is very low, and no touch inductance is generated on the human body.
Considering that the permanent magnet 401 and the normally closed reed switch 4021 constitute an off switch, the installation positions of the permanent magnet 401 and the normally closed reed switch 4021 can be interchanged.
In addition, as an implementation scheme, the elastic cavity 1051 is made of a sub-conductor material, such as conductive rubber or plastic, and the ground resistance of the sub-conductor material is 10 mega ohm to 1000 mega ohm, and the sub-conductor elastic cavity can replace the resistor R, and certainly, the resistor R can be still arranged
Fig. 5 shows a design scheme of coupling the hand touch electrode with the clamp arm through an elastic member, in this case, the elastic force of the elastic cavity 1051 provides the restoring force of the grounding switch, so that an elastic member may be used instead, the hand touch electrode 301 is coupled with the clamp arm through an elastic member 3011, the elastic force f is provided by an elastic member, such as a spring, a spring sheet, etc., in this design, it should be considered that the hand touch electrode 301 should be insulated from the ground, which is a routine process for those skilled in the art, and fig. 5 shows the embodiment of fig. 1 as an example, and this design scheme is also applicable to the schemes described in fig. 2, fig. 3, and fig. 4.
In addition, a glow discharge tube can be arranged in the electrostatic discharge loop to display the discharge process of the static electricity (in the case of meeting the explosion-proof requirement, such as explosion-proof neon bubbles).
In addition, in consideration of the withstand voltage of the reed switch, a vacuum reed switch can be adopted, the gap between electrodes is enlarged, and alternatively, the reed switch can be filled with insulating withstand voltage oil to form 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 epsilon of the transformer oil is between 2.2 and 2.4. The oil-immersed reed switch has the advantages that opening or closing is delayed, and for the scheme, the delayed closing of the normally-open reed switch is beneficial to prolonging the time of electrostatic pre-release of a human body, and meanwhile, the delayed closing of the normally-open reed switch is beneficial to the stable occlusion state of the electrostatic grounding clamp (namely, the normally-open reed switch is closed and conducted after the grounding tooth and the conductor are stably connected).
The resistance value of the resistor provided by the invention can be understood as a recommended value, the protection range of the resistor is not necessarily limited, and the reference implementation is specifically carried out according to the standard of the related industry, such as GB4385-1995 (the recommended value is 100k omega-1000M omega), GB/T11210 2014 (the recommended value is not more than 300M omega), GJB 2605 1996, GB 12014 1989, and the industry standard SY/T7354-2017 (the recommended value is 10 Megaohm-1000 MegaOhm).
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.
Claims (17)
1. The utility model provides an explosion-proof type static ground connection pincers of human static of safe release, includes tong arm, pincers body spring, keeps silent, has ground connection tooth, characterized by in keeping silent: the jaw is also provided with a normally open reed switch, a small spring and a permanent magnet, the normally open reed switch is bridged between the grounding tooth and the ground wire, the normally open reed switch and the permanent magnet are supported by the small spring and are far away from each other to enable the normally open reed switch to be in an open circuit state when the jaw is in an open state, when the jaw is meshed with the conductor, the permanent magnet and the grounding tooth are close to the normally open reed switch in a follow-up manner to enable the normally open reed switch to be closed, and at the moment, the conductor is conducted with the ground wire;
and when the forceps arms of the electrostatic grounding forceps are held by hands until the jaws are opened, the hand-touch electrode and the grounding electrode are certainly contacted and conducted by overcoming the elastic force, so that the hand-touch electrode is grounded to release human body static electricity.
2. The utility model provides an explosion-proof type static ground connection pincers of human static of safe release, includes tong arm, pincers body spring, keeps silent, has ground connection tooth, characterized by in keeping silent: the jaw is also provided with a normally open reed switch, a small spring and a permanent magnet, the normally open reed switch is bridged between the grounding tooth and the ground wire, the normally open reed switch and the permanent magnet are supported by the small spring and are far away from each other to enable the normally open reed switch to be in an open circuit state when the jaw is in an open state, when the jaw is meshed with the conductor, the permanent magnet and the grounding tooth are close to the normally open reed switch in a follow-up manner to enable the normally open reed switch to be closed, and at the moment, the conductor is conducted with the ground wire;
at least one of the forceps arms is provided with a hand touch electrode and a pressure switch, the pressure switch is bridged between the hand touch electrode and the ground wire, the hand touch electrode is attached to a pressure handle of the pressure switch, the touch pressure of the pressure switch is smaller than the elastic force of a forceps body spring, and when the forceps arms of the electrostatic grounding forceps are held by hands until the forceps jaws are opened, the holding force of the hands inevitably overcomes the touch pressure to close and conduct the pressure switch, so that the hand touch electrode is grounded to release the static electricity of a human body.
3. The utility model provides an explosion-proof type static ground connection pincers of human static of safe release, includes tong arm, pincers body spring, keeps silent, has ground connection tooth, characterized by in keeping silent: the jaw is also provided with a normally open reed switch, a small spring and a permanent magnet, the normally open reed switch is bridged between the grounding tooth and the ground wire, the normally open reed switch and the permanent magnet are supported by the small spring and are far away from each other to enable the normally open reed switch to be in an open circuit state when the jaw is in an open state, when the jaw is meshed with the conductor, the permanent magnet and the grounding tooth are close to the normally open reed switch in a follow-up manner to enable the normally open reed switch to be closed, and at the moment, the conductor is conducted with the ground wire;
at least one of the forceps arms is provided with a hand touch electrode and a pressure switch, the pressure switch is bridged between the hand touch electrode and the ground wire, the hand touch electrode and a pressure handle of the pressure switch are kept separated or in zero pressure contact by elasticity, the resultant force of the sum of the elasticity and the touch pressure of the pressure switch is smaller than the elasticity of a forceps body spring, when the forceps arms of the electrostatic grounding forceps are held by hands until the jaws are opened, the holding force of the hands overcomes the resultant force to close and conduct the pressure switch, and the hand touch electrode is grounded to release the static electricity of a human body.
4. The explosion-proof type electrostatic grounding clamp for safely discharging human body static electricity according to claim 3, which is characterized in that: the pressure switch is hermetically wrapped in the first elastic cavity.
5. The utility model provides an explosion-proof type static ground connection pincers of human static of safe release, includes tong arm, pincers body spring, keeps silent, has ground connection tooth, characterized by in keeping silent: the jaw is also provided with a normally open reed switch, a small spring and a permanent magnet, the normally open reed switch is bridged between the grounding tooth and the ground wire, the normally open reed switch and the permanent magnet are supported by the small spring and are far away from each other to enable the normally open reed switch to be in an open circuit state when the jaw is in an open state, when the jaw is meshed with the conductor, the permanent magnet and the grounding tooth are close to the normally open reed switch in a follow-up manner to enable the normally open reed switch to be closed, and at the moment, the conductor is conducted with the ground wire;
the permanent magnet I and the normally open reed pipe I are kept separated by elasticity and are opened, the elasticity is smaller than that of a spring of the clamp body, when the clamp arms of the electrostatic grounding clamp are held by hands until a clamp jaw is opened, the permanent magnet I is inevitably close to the normally open reed pipe to be conducted, and the grounding of the hand contact electrode is realized to release the static electricity of a human body.
6. The explosion-proof type electrostatic grounding clamp for safely discharging human body static electricity according to claim 5, which is characterized in that: the mounting positions of a normally open reed pipe I and a permanent magnet I arranged on the forceps arm can be interchanged.
7. The utility model provides an explosion-proof type static ground connection pincers of human static of safe release, includes tong arm, pincers body spring, keeps silent, has ground connection tooth, characterized by in keeping silent: the jaw is also provided with a normally open reed switch, a small spring and a permanent magnet, the normally open reed switch is bridged between the grounding tooth and the ground wire, the normally open reed switch and the permanent magnet are supported by the small spring and are far away from each other to enable the normally open reed switch to be in an open circuit state when the jaw is in an open state, when the jaw is meshed with the conductor, the permanent magnet and the grounding tooth are close to the normally open reed switch in a follow-up manner to enable the normally open reed switch to be closed, and at the moment, the conductor is conducted with the ground wire;
the permanent magnet I and the normally closed reed pipe are kept close to each other by elasticity and are opened, the elasticity is smaller than that of a spring of the clamp body, when the clamp arms of the electrostatic grounding clamp are held by hands until the clamp jaws are opened, the permanent magnet I is inevitably separated from the elasticity and the normally closed reed pipe to be conducted, and the grounding of the hand contact electrode is realized to release the static electricity of a human body.
8. The explosion-proof type electrostatic grounding clamp for safely discharging human body static electricity according to claim 7, which is characterized in that: the normally closed reed switch and the first permanent magnet arranged on the forceps arm can be interchanged in installation position.
9. The explosion-proof electrostatic grounding clamp for safely releasing human body static electricity according to any one of claims 1 to 8, characterized in that: the installation positions of the normally open reed pipe and the permanent magnet arranged in the jaw can be interchanged.
10. The explosion-proof electrostatic grounding clamp for safely releasing human body static electricity according to any one of claims 1 to 8, characterized in that: the normally open reed switch is connected with the resistor R1 in parallel, and pre-discharges the conductor in the process that the electrostatic grounding clamp bites the conductor.
11. The explosion-proof type electrostatic grounding clamp for safely discharging human body static electricity according to claim 10, which is characterized in that: range of resistance R1: 1 mega ohm to 1000 mega ohm.
12. The explosion-proof type electrostatic grounding clamp for safely discharging human body static electricity according to claim 1, 3, 4, 5, 6, 7 or 8, characterized in that: the clamp arms are wrapped with elastic cavities, and the elastic force is provided by the elastic cavities.
13. The explosion-proof type electrostatic grounding clamp for safely discharging human body static electricity according to claim 12, wherein: the elastic cavity is made of a sub-conductor material.
14. The explosion-proof type electrostatic grounding clamp for safely discharging human body static electricity according to claim 12, wherein: the elastic cavity is made of conductive rubber.
15. The explosion-proof type electrostatic grounding clamp for safely discharging human body static electricity according to claim 1, 3, 4, 5, 6, 7 or 8, characterized in that: the hand touch electrode is coupled to the jawarms by a spring, the spring being provided by the spring.
16. The explosion-proof electrostatic grounding clamp for safely releasing human body static electricity according to any one of claims 1 to 8, characterized in that: and a resistor is arranged to be bridged between the hand contact electrode and the ground wire, and when the hand contacts the clamp arm of the electrostatic grounding clamp, the resistor pre-discharges the static electricity of the human body.
17. The explosion-proof type electrostatic grounding clamp for safely discharging human body static electricity according to claim 16, which is characterized in that: the resistance value of the resistor is as follows: 10 megohm-1000 megohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010334835.6A CN111564707B (en) | 2020-04-24 | 2020-04-24 | Explosion-proof type static grounding clamp capable of safely releasing human body static electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010334835.6A CN111564707B (en) | 2020-04-24 | 2020-04-24 | Explosion-proof type static grounding clamp capable of safely releasing human body static electricity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111564707A CN111564707A (en) | 2020-08-21 |
| CN111564707B true CN111564707B (en) | 2021-09-10 |
Family
ID=72071591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010334835.6A Active CN111564707B (en) | 2020-04-24 | 2020-04-24 | Explosion-proof type static grounding clamp capable of safely releasing human body static electricity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111564707B (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19832454A1 (en) * | 1998-07-18 | 2000-01-20 | Andreas Franken | A method for discharging static electricity from personal clothing by a pad with a signal means |
| CN101121062A (en) * | 2006-08-10 | 2008-02-13 | 辅祥实业股份有限公司 | Running machine electrostatic guiding structure for human body |
| CN101308963B (en) * | 2008-05-21 | 2011-04-13 | 无锡市格林电工装备有限公司 | Explosion preventing electrostatic grounding grip |
| CA2921801C (en) * | 2013-09-09 | 2020-07-14 | Schunk Bahn- Und Industrietechnik Gmbh | Discharge device |
| CN204031567U (en) * | 2014-08-22 | 2014-12-17 | 信众 | Static grounding clamp |
| CN206077808U (en) * | 2016-09-05 | 2017-04-05 | 中国石油天然气股份有限公司 | A kind of tank car Electro-static Driven Comb folder |
| CN107864542A (en) * | 2017-12-19 | 2018-03-30 | 宁波沈南知识产权运营有限公司 | A kind of static grounding clamp |
| CN208128615U (en) * | 2018-05-04 | 2018-11-20 | 青岛澳波泰克安全设备有限责任公司 | A kind of sensing type static grounding clamp |
| CN209561650U (en) * | 2019-03-13 | 2019-10-29 | 沈阳华兴防爆器材有限公司 | A kind of Intelligent electrostatic earthing folder |
| CN209882187U (en) * | 2019-04-24 | 2019-12-31 | 上海颀普静电科技有限公司 | Grounding structure of electrostatic eliminator |
-
2020
- 2020-04-24 CN CN202010334835.6A patent/CN111564707B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111564707A (en) | 2020-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101454859B (en) | Short switch device | |
| CA2802983A1 (en) | Arcing fault and arc flash protection system having a high-speed switch | |
| EP3550581B1 (en) | Methods and apparatus for dc arc detection/suppression | |
| WO2001026185A1 (en) | An improved battery clamp | |
| US4663692A (en) | Electrical surge arrester and disconnector | |
| CN107258041B (en) | Resist the electrical equipment of arc fault | |
| CN111564707B (en) | Explosion-proof type static grounding clamp capable of safely releasing human body static electricity | |
| SE9404455L (en) | Electrical switchgear | |
| CN111632269A (en) | Electrostatic grounding clamp capable of safely releasing human static electricity | |
| CN111628360B (en) | Explosion-proof static grounding clamp | |
| CN101836340B (en) | Damage-limiting switching device for surge arresters | |
| CN107370140B (en) | Protective device for protection against temporary overvoltages | |
| CN111632268A (en) | Explosion-proof static ground connection pincers | |
| CN111541057A (en) | Intrinsic safety explosion-proof type electrostatic grounding clamp | |
| CN203932706U (en) | A kind of arc-extinguishing harmonic-eliminating cabinet | |
| CN212101977U (en) | Intrinsic safety explosion-proof type oil gun | |
| CN111606296A (en) | Intrinsic safety explosion-proof type oiling device | |
| RU2714927C2 (en) | Improved disconnector and surge arrester including such disconnector | |
| CN111564330A (en) | Explosion-proof electrode and application thereof | |
| CN101308963B (en) | Explosion preventing electrostatic grounding grip | |
| US3656057A (en) | Safety terminator with testing and pulling means | |
| CA3096553C (en) | Grid influencing system | |
| CN111285321A (en) | Intrinsic safety explosion-proof type oil gun | |
| CN113035475A (en) | Explosion-proof lightning arrester | |
| CN111370250A (en) | Intrinsic safety explosion-proof human body electrostatic discharge keyboard and keys |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221205 Address after: No. 309, Floor 3, East Building, Electronics Industrial Park, Ganquan Road, Xinting Street, Shen County, Liaocheng City, Shandong Province, 252000 Patentee after: Shenxian Lukai Comprehensive Service Co.,Ltd. Address before: 226019 1-107, Science Park, No. 58, Chongchuan Road, Chongchuan District, Nantong City, Jiangsu Province Patentee before: Wu Fan |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230802 Address after: 252000 North Road, 288 meters east of the intersection of Ganquan Road and Gengxin Street, Xinting Office, Shen County, Liaocheng City, Shandong Province Patentee after: Shenxian Ruixinda New Material Technology Co.,Ltd. Address before: No. 309, Floor 3, East Building, Electronics Industrial Park, Ganquan Road, Xinting Street, Shen County, Liaocheng City, Shandong Province, 252000 Patentee before: Shenxian Lukai Comprehensive Service Co.,Ltd. |