CN111330152A - Intrinsic safety explosion-proof human body static electricity releasing ball - Google Patents
Intrinsic safety explosion-proof human body static electricity releasing ball Download PDFInfo
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- CN111330152A CN111330152A CN202010093913.8A CN202010093913A CN111330152A CN 111330152 A CN111330152 A CN 111330152A CN 202010093913 A CN202010093913 A CN 202010093913A CN 111330152 A CN111330152 A CN 111330152A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/14—Leading-off electric charges, e.g. by earthing
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Abstract
The invention relates to the technical field of human body static electricity discharge elimination, in particular to an intrinsic safety explosion-proof human body static electricity discharge ball. The method is characterized in that: the touch ball is driven to perform stroke motion when the touch ball is pressed by a hand, the normally open magnetic control switch is closed when the permanent magnet is close to the normally open magnetic control switch, the static electricity of a human body is conducted to the ground wire through the touch ball touched by the hand, and the touch ball is reset under the action of the elastic resetting device and is enabled to lose the magnetic field of the permanent magnet to open a circuit after the hand is loosened.
Description
Technical Field
The invention relates to the technical field of human body static electricity discharge elimination, in particular to an intrinsic safety explosion-proof human body static electricity discharge ball.
Background
The human body static electricity releasing ball is also called as a human body static electricity eliminating ball, and is a human body static electricity releasing product suitable for inflammable, explosive and static electricity preventing places.
However, the existing human body static electricity releasing ball is made of stainless steel, the ball body (the touch ball) is connected with the ground, and the human body static electricity is quickly introduced into the ground after a hand contacts the ball body.
The static electricity of the human body needs a certain time (relaxation time), and for the traditional fixed static electricity releasing ball, an operator can hardly subjectively judge whether the time needed for eliminating the static electricity is reached.
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 human body electrostatic discharge requires no spark, no electric shock, and no long discharge time, and the human body capacitance is usually a constant value according to Q (electric quantity) = U (voltage) × C (capacitance), I (current) = U (voltage)/R (resistance), and in order to avoid instantaneous discharge, a discharge resistance is provided, i.e. the discharge power P = U is limited2In the case of a constant resistance, the voltage decreases with the decrease in the quantity of electricity, the discharge current decreases, the discharge time increases, and the discharge power decreases rapidly with the square of the voltage (P = U) (/ R)2/R), if a discharge power is defined, the resistance decreases rapidly for a rapid discharge.
According to the time constant T = RC of the discharge, under the condition that C is constant, the larger the resistance, the longer the required discharge time is, and the smaller the resistance, the larger the discharge power is, and the sparks are easy to generate, so the variable resistance discharge is also solved.
The invention aims to avoid electric sparks (or isolate electric sparks) in the process of releasing the static electricity of the human body, further avoid electric shock feeling to the human body and realize quick static electricity release.
The technical scheme of the invention is as follows:
an intrinsic safety explosion-proof human body static electricity release ball is characterized in that: at least including touch ball, elastic resetting means, permanent magnet, normally open magnetic control switch, ground wire, normally open magnetic control switch one end is connected on the touch ball, the normally open magnetic control switch other end is connected on the ground wire, normally open magnetic control switch with proximity switch is constituteed to the permanent magnet, the touch ball can be followed an axis and is made the stroke motion, and the hand is pressed the touch ball and is carried out the stroke motion and make proximity switch is closed, and human static electricity passes through the touch ball conduction of hand touch to the ground wire, is in behind the pine hand make the touch ball reset and make normally open magnetic control switch lose the magnetic field of permanent magnet and open a way under elastic resetting means's the effect.
An intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the touch ball is driven to perform stroke motion when the touch ball is pressed by a hand, the normally open magnetic control switch is closed when the permanent magnet is close to the normally open magnetic control switch, the static electricity of a human body is conducted to the ground wire through the touch ball touched by the hand, and the touch ball is reset under the action of the elastic resetting device after the hand is loosened, and the normally open magnetic control switch loses the magnetic field of the permanent magnet to be opened;
or: the touch ball is driven to move along a stroke when the touch ball is pressed by a hand, the normally open magnetic control switch is closed when the normally open magnetic control switch is close to the permanent magnet, human static electricity is conducted to the ground wire through the touch ball touched by the hand, and the touch ball is reset under the action of the elastic resetting device and is enabled to lose the magnetic field of the permanent magnet to open a circuit after the hand is loosened.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: a resistor is arranged in parallel with the normally open magnetic control switch, and the resistance value is as follows: 10 megohm-1000 megohm.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the touch ball is connected with the touch ball through the first normally-open magnetic control switch, the touch ball is connected with the touch ball through the second normally-open magnetic control switch, one end of the second normally-open magnetic control switch is connected to the touch ball, the other end of the second normally-open magnetic control switch is connected to the ground after being connected with the resistor in series, the second normally-open magnetic control switch is located in the stroke of the permanent magnet, when the touch ball is pressed by a hand, the permanent magnet is driven to perform stroke movement, the action of the second normally-open magnetic control switch is prior to that of the first normally-.
And the device further comprises an nth normally-open magnetic control switch and a resistor, and pre-discharge is carried out for n times, wherein n is the number of pre-discharge times.
Further, the resistance is 4 kilo-ohms to 600 mega-ohms.
And optimizing, wherein the resistance is 1-200 megohms.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: and the indicating lamp string is connected in the loop of the normally open magnetic control switch and is used for indicating the working state of the normally open magnetic control switch.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the normally open magnetic control switch is an explosion-proof normally open magnetic control switch.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the normally open magnetic control switch is a normally open reed switch.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the elastic reset device consists of a spring.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the elastic reset device is made of rubber or conductive rubber.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the device also comprises an electrostatic detection device which is used for detecting the electrostatic discharge effect and prompting by sound or light.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: mechanical ringing is also included, and the ringing prompts after the static electricity of the human body is released.
The intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the installation positions of the normally open magnetic control switch and the permanent magnet can be interchanged.
The invention has the beneficial effects that: the electric spark is not generated (or isolated) in the process of releasing the static electricity of the human body, so that the human body is further not shocked, and meanwhile, the time required by releasing the static electricity is ensured (unexpected effect) due to the existence of the pressing stroke.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention.
FIG. 2 is a schematic diagram of the device for increasing the pre-discharge by 1 time according to the present invention.
FIG. 3 is a circuit diagram of a serial indicator light according to the present invention.
Fig. 4 is an embodiment of the present invention for adding mechanical ring alert.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic diagram of the device of the invention, wherein a reed switch is a normally open reed switch. The touch ball 101 is made of a conductive material, 202 is a stroke rod connected to the touch ball 101, a spring 201 is arranged on the stroke rod 202, the spring 201 is used for enabling the stroke rod 202 to reset after a hand releases the touch ball 101, permanent magnets 302 and 102 are transition sections made of insulating materials and used for enabling the touch ball 101 and a support 103 to be insulated, 104 is a base plate, the support 103 and the base plate 104 are made of conductive materials, one end of a reed switch 301 is connected to the touch ball 101, and the other end of the reed switch 301 is connected to the support so as to be connected to the ground. The working principle is as follows:
when a human body carries static electricity, the touch ball 101 is touched by a hand and the touch ball 101 is pressed (when the touch ball 101 is touched by the hand but before the touch ball 101 is pressed, the touch ball 101 is not grounded, so electric sparks are not generated when the touch ball 101 is touched by the hand), in the pressing process, the touch ball 101 drives the stroke rod 202 to perform stroke motion on an axis and simultaneously drives the permanent magnet 302 to perform stroke motion, when the permanent magnet reaches the position near the reed pipe 301, the reed pipe 301 is closed, at the moment, the human body static electricity is led into the chassis through the closed reed pipe 301 and merged into the ground, and after the touch ball 101 is released by the hand, the stroke rod 202 drives the touch ball 101 to reset together under the action of the spring 201.
Considering that the permanent magnet and the reed switch form the proximity switch, the installation or arrangement positions of the permanent magnet and the reed switch can be interchanged, and the connecting electric circuit is unchanged.
Because two electric contacts of the reed switch are positioned in the closed space and belong to an explosion-proof device, even if electric sparks are generated by the electric contacts of the reed switch, the electric sparks cannot be transmitted to the outside, so that the reed switch is an intrinsic safety explosion-proof device.
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 may be set in parallel with the reed switch 301, and pre-discharge is performed when touching, and the resistance value is: 10 megohm-1000 megohm. Meanwhile, due to the existence of the pressing stroke, the time required by electrostatic discharge is ensured (unexpected effect).
In view of the variant of embodiment, the essential features of the invention are: the touch ball is provided with a permanent magnet, a normally open magnetic control switch (normally open reed pipe) is arranged at a proper position corresponding to the permanent magnet, and the normally open magnetic control switch is bridged between the touch ball and the ground. And a resistor of 10 megohm-1000 megohm is connected in parallel with the normally open magnetic control switch. Variant embodiments are as follows: the touch ball is made of conductive rubber, the permanent magnet is arranged on the conductive rubber, the normally open magnetic control switch is bridged between the conductive rubber and the ground, the resistance value of the conductive rubber is 10-1000 mega ohm (equivalent to the resistance connected in parallel at two ends of the normally open magnetic control switch), and the permanent magnet is reset by the elasticity of the conductive rubber (equivalent to an elastic resetting device).
FIG. 2 is a schematic diagram of the device for increasing the pre-discharge by 1 time according to the present invention. In this embodiment, a second reed switch 303 and a resistor 401 are added on the basis of the embodiment of fig. 1, the second reed switch 303 and the resistor 401 are connected in series and then connected between the touch ball 101 and the ground, during the stroke of the stroke rod 202, 303 performs a current action, 301 performs a back action, and the process is as follows:
① touch the touch ball 101 by hand, the transition segment 102 keeps the touch ball 101 insulated from the ground, and no electrostatic spark is generated when touching;
② the touch ball 101 is pressed by hand to drive the stroke rod 202 to do stroke movement;
③ the permanent magnet 302 on the stroke rod 202 strokes to the vicinity of the second reed pipe 303 to close the second reed pipe 303, at this time, the static electricity of the human body is pre-discharged through the resistor 401, and the electric shock feeling of the human body can be eliminated by selecting the resistance value of the resistor 401;
at present, a touch ball body made of a sub-conductor material (the industry standard SY/T7354-2017, the resistance is 10-1000 megohms) is adopted, the instantaneous human body static electricity release energy is reduced, the electric shock feeling is reduced, the human body static electricity release time needs to be prolonged, and static electricity carried by a human body cannot be completely released due to the existence of the resistance.
The human body resistance is generally 2 kilo-ohm-20 mega-ohm, the human body static is generally thousands of volts-tens of thousands of volts, the air breakdown field intensity is about 30kV/cm, the electrostatic shock of the finger tip is just caused by air breakdown, if 3000 volts are needed for breakdown according to 1mm, 9000 volts of the human body electrostatic voltage is taken, according to the ohm law, the voltage distributed by the human body does not exceed 3000 volts, and the resistance is 4 kilo-ohm-600 mega-ohm. According to specific tests, most of the conditions (such as 100 megohms) can be satisfied by taking 50 megohms to 200 megohms. The resistor is the total resistance of electrostatic overcurrent.
④ the touch ball 101 is pressed continuously to drive the stroke rod 202 to move continuously, the permanent magnet 302 on the stroke rod 202 moves to the vicinity of the reed pipe 301 to close the reed pipe 301, at this time, the human body is grounded directly, and the static electricity of the human body is released completely.
⑤, when the hand is released, the travel rod 202 and the touch ball 101 are driven to reset under the action of the spring 201, and the next operation of eliminating the static electricity of the human body is waited.
Further, an nth reed switch and a resistor may be disposed before the reed switch 301 in the stroke of the permanent magnet, and pre-discharge may be performed n times, where n is the number of pre-discharges. The pre-discharge is performed to further reduce the shock to the human body when the static electricity is discharged, so the resistance should be set from large to small (according to the specific situation, it can be selected from large to small at 1 mega ohm-1000 mega ohm), for example, 3 times of pre-discharge is set, and the resistance can be set to 100 mega ohm, 50 mega ohm, 1 mega ohm.
FIG. 3 is a circuit diagram of a serial indicator light according to the present invention. The power supply E, the reed switch and the LED loop are used for indicating the successful action of the reed switch through the LED, and the LED is an intrinsic safety explosion-proof indicator lamp.
In the embodiment, the reed switch (in the case of the normally open reed switch) can be popularized to be a normally open magnetic control switch, for example, an explosion-proof normally open magnetic control switch is determined by one step by adopting a solid switch of a Hall device.
In the embodiment, the spring 201 plays a role in resetting and is popularized as an elastic resetting device.
In an embodiment, the conductive material may be a metallic material, such as stainless steel.
Fig. 4 is an embodiment of the present invention for adding mechanical ring alert. The implementation scheme is a passive prompting solution, has the function of prompting by ringing after the completion of the static electricity release of the human body, and has the working principle that: the armature 503 is made of ferromagnetic material or permanent magnet (the magnetic pole arrangement and 302 attract each other), the other end of the armature 503 is a knocking hammer 502, when the stroke rod 202 strokes to the extreme position, 302 and 503 attract each other, the knocking bell 501 is driven 502 to sound, thereby prompting the completion of the electrostatic discharge of the human body.
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).
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 system 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 (10)
1. An intrinsic safety explosion-proof human body static electricity release ball is characterized in that: the touch ball is driven to perform stroke motion when the touch ball is pressed by a hand, the normally open magnetic control switch is closed when the permanent magnet is close to the normally open magnetic control switch, the static electricity of a human body is conducted to the ground wire through the touch ball touched by the hand, and the touch ball is reset under the action of the elastic resetting device and is enabled to lose the magnetic field of the permanent magnet to open a circuit after the hand is loosened.
2. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 1, wherein: a resistor is arranged in parallel with the normally open magnetic control switch, and the resistance value is as follows: 10 megohm-1000 megohm.
3. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 1, wherein: the touch ball is connected with the touch ball through the first normally-open magnetic control switch, the touch ball is connected with the touch ball through the second normally-open magnetic control switch, one end of the second normally-open magnetic control switch is connected to the touch ball, the other end of the second normally-open magnetic control switch is connected to the ground after being connected with the resistor in series, the second normally-open magnetic control switch is located in the stroke of the permanent magnet, when the touch ball is pressed by a hand, the permanent magnet is driven to perform stroke movement, the action of the second normally-open magnetic control switch is prior to that of the first normally-.
4. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 3, wherein: the device also comprises an nth normally-open magnetic control switch and a resistor, wherein n times of pre-discharge are carried out, and n is the number of times of pre-discharge.
5. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 3 or 4, wherein: the resistance is 4 kilo-ohms to 600 mega-ohms.
6. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 5, wherein: the resistance is 1 megohm-200 megohm.
7. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 1, 2, 3 or 4, wherein: the normally open magnetic control switch is an explosion-proof normally open magnetic control switch.
8. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 1, 2, 3 or 4, wherein: the normally open magnetic control switch is a normally open reed switch.
9. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 1, 2, 3 or 4, wherein: the elastic reset device consists of a spring.
10. The intrinsically safe explosion-proof human body static electricity releasing ball as claimed in claim 1, 2, 3 or 4, wherein: the elastic reset device is made of rubber or conductive rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010093913.8A CN111330152A (en) | 2020-02-14 | 2020-02-14 | Intrinsic safety explosion-proof human body static electricity releasing ball |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010093913.8A CN111330152A (en) | 2020-02-14 | 2020-02-14 | Intrinsic safety explosion-proof human body static electricity releasing ball |
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| Publication Number | Publication Date |
|---|---|
| CN111330152A true CN111330152A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010093913.8A Pending CN111330152A (en) | 2020-02-14 | 2020-02-14 | Intrinsic safety explosion-proof human body static electricity releasing ball |
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| CN (1) | CN111330152A (en) |
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2020
- 2020-02-14 CN CN202010093913.8A patent/CN111330152A/en active Pending
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