CN204407702U - Electric welding machine Special-purpose air switch - Google Patents
Electric welding machine Special-purpose air switch Download PDFInfo
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- CN204407702U CN204407702U CN201520011541.4U CN201520011541U CN204407702U CN 204407702 U CN204407702 U CN 204407702U CN 201520011541 U CN201520011541 U CN 201520011541U CN 204407702 U CN204407702 U CN 204407702U
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Abstract
The utility model discloses a kind of electric welding machine Special-purpose air switch, comprise air switch housing and switch panel, in air switch housing, be provided with magnetic test coil LQ, air switch housing is provided with PE line terminals; PE line terminals is connected with and is arranged at electric leakage within air switch housing and PE line overcurrent protector PEB, within electric leakage and PE line overcurrent protector PEB, be provided with current detecting and thermal protective element.The invention also discloses another kind of electric welding machine Special-purpose air switch; comprise air switch and independently PE line overcurrent protector; PEB air switch and independently between PE line overcurrent protector PEB by linear quadratic control connection, combine electric welding machine Special-purpose air switch.Electric welding machine Special-purpose air switch of the present utility model, have can solve the shunting of electric welding machine secondary side earth mat burn protective earthing line problem, realize PE line overcurrent and report to the police and inverse time lag tripping operation, be applicable to the advantages such as various direct current-direct current (AC-DC) weldings.
Description
Technical field
The utility model relates to a kind of air switch, especially a kind of electric welding machine Special-purpose air switch stopping power transmission operation and safeguard protection for electric welding machine.
Background technology
According to national regulations (GB9448-1999 " welding and cutting safety "), shell of electric welding machine and second siding ring must connect protection ground wire (PE line), to protect the personal safety of operator.But due to the existence of electric welding machine secondary side earth mat shunting, easily cause shell of electric welding machine PE line to burn because of overcurrent, make PE line become accident source on the contrary.
Power supply connection layout when Figure 10 is the air switch of electric welding machine employing routine, b end (bonding end) of shell of electric welding machine, iron core, secondary side is connected with protective earthing line (PE line), forms the first earth point (f point); Weldment and factory building metal building structure UNICOM, form the second earth point (e point).Welding current I is decomposed into I at solder joint (c point)
hand I
ftwo-way electric current, I
hfor ground strap normal reflow (in figure c → d → b), I
ffor earth mat shunting (in figure c → e → f → g → h → b) formed through ground networks.
Generally, the metal frame of building and various machine foundation always communicate with electric power system ground network, and the resistance of ground network less (0 < R≤4 Ω, is generally metal direct connection, and resistance is in m Ω or μ Ω level).Due to the existence of weldment c, d point-to-point transmission contact resistance, earth mat shunting I during welding
fhave its certainty, just vary in size.The sectional area of electric welding machine earth connection is generally 4-16mm
2, allow that ampacity is at 30--100A, and electric welding machine low-pressure side operating current (I) is general at about 100--1000A, when there is trip point ground strap major loop centre (in such as figure d point open circuit), I
h→ 0, I
f→ I, welding current all flows back to electric welding machine secondary coil b point through ground network and shell of electric welding machine protective earthing line (PE line), and this huge electric current is enough to burn electric welding machine protective earthing line in a short period of time, and then burns whole piece feed cable.In the utility model, this welding current component being back to electric welding machine protective earthing line through ground network is defined as " shunting of electric welding machine secondary side earth mat ", is called for short " earth mat shunting ".
The harmfulness of earth mat shunting is: might not recognize the existence that earth mat is shunted when operator welds, because earth mat shunting can maintain normally carrying out of welding equally, to such an extent as to likely participates in welding overall process as main current channel.Its duration long (can reach the several seconds to several tens minutes), electric current large (the supreme kilo-ampere of tens peaces), current path cannot be expected.This huge electric current out of control is not only enough within the extremely short time, burn electric welding machine protection ground wire; and likely damage the hardware in building structure or the weakness of some in machinery equipment, precise part; such as bearing contact surfaces, reinforcing bar binding point, make it by scorification, scaling loss.For a long time large welding current also likely making metal parts on the way anneal because seriously generating heat, being out of shape, prestressing force loses and adhesion between concrete declines etc.; also likely scurry into automatically controlled secondary circuit; cause circuit to burn out, measure misalignment, instrument is damaged, control malfunctioning, protective relaying maloperation and do etc., its consequence caused is difficult to expect often.
According to above analysis, the necessary and sufficient condition producing the shunting of welding current earth mat is: (1) shell of electric welding machine and secondary coil have protective earthing (zero) line---one point earth; (2) welded part and ground networks are connected---second point ground connection; (3) there is contact resistance or open circuit in the middle of ground strap loop (welding current return loop).Prevent the generation that earth mat is shunted, will be destroyed one or two in above-mentioned three conditions.
In fact, the discussion about this problem is long-standing.Such as, in " primary electrical welder' s technique " (the national Machinery Industry Commission state-compiled textbook) to publish for 1988, just clearly give the way addressed this problem: (1) electric welding machine secondary side and weldment can not while ground connection; (2) cannot avoid the two simultaneously ground connection time, electric welding machine secondary side joint ground wire should be removed temporarily, recover again after construction.
And the respective specified about ground connection in 11.3 of national standard " welding and cutting safety " (GB 9448-1999) comprises following two.(1) welding machine must with correct method ground connection (or connecting to neutral).Ground connection (or connecting to neutral) device must connect well, and permanent ground connection (or connecting to neutral) should be made regular check on.(2) on the weldment having ground connection (or connecting to neutral) device, carry out arc-welding operation, or when welding weldment (as: metallic support etc. in pipeline, house) that be closely connected with the earth, should be specifically noted that the dual grounds avoiding welding machine and workpiece.
Whether simultaneously this solution in force Problems existing is: (1), in face of working site complicated and changeable and busy task, operator is often difficult to judge in advance before welding, also cannot running check electric welding machine and weldment ground connection.Second point ground connection also likely occurs in welding process in addition; (2) even if both existence ground connection simultaneously, but if ground strap contacts well with weldment, or the position of pad is different, and the earth mat shunting of generation is also likely very little, so ground connection may not be bound to burn earth connection simultaneously; (3) interim earth connection of removing brings potential safety hazard, and protects the violator of ground wire to provide excuse for not connecing to electric welding machine, and its potential harm is huge.
Current actual conditions are: for the accident avoiding PE line to burn frequently occurs, and electrical welding operation person often simply removes PE line, make to break rules and regulations to become normality, and GB associated safety regulation performs practically no function.The accident of human electric shock caused thus emerges in an endless stream, and becomes a large construction safety difficult problem of electric welding industry.
The Chinese new patent that application number is 201220082692.5, application people is Baoji Petroleum Machinery Co., Ltd. discloses a kind of electric welding machine ground detection device, the ground wire of the ground connection input of electric welding machine is connected with current transformer by pincerlike iron core, current transformer is connected with range selector, be provided with live wire and holding wire in the fire wire output end of electric welding machine simultaneously, live wire is connected with soldering turret, and holding wire is connected with the display unit be fixed on soldering turret; The shortcoming of this utility model patent technical scheme is: (1) can only be detected in electric welding machine bond and reflux with or without electric welding, can not ensure do not have earth mat to shunt and enter electric welding machine protection ground wire; (2) device can only provide the signal of ground strap ground state, can not trip by driving power; (3) acousto-optic hint is with overall process during normal weld, and be not accordant to the old routine fault alarm pattern; (4) AC welding set is suitable only for, invalid to DC welder.
Utility model content
The utility model is for avoiding the weak point that exists in above-mentioned prior art, providing a kind of electric welding machine Special-purpose air switch, to solve the problem that protective earthing line is burnt in the earth mat shunting of electric welding machine secondary side.
The utility model be technical solution problem by the following technical solutions.
Electric welding machine Special-purpose air switch, its design feature is, comprises air switch housing and switch panel, is provided with magnetic test coil LQ in described air switch housing, and described air switch housing is provided with PE end of incoming cables and PE leading-out terminal; Be provided with between described PE end of incoming cables and PE leading-out terminal and be positioned at electric leakage within described air switch housing and PE line overcurrent protector PEB, within described electric leakage and PE line overcurrent protector PEB, be provided with current detecting and thermal protective element; The top of described switch panel is provided with end of incoming cables, and the bottom of switch panel is provided with leading-out terminal; Described switch panel is also provided with PE line overcurrent audible-visual annunciator, handle from top to down, the board indicating device that pours off crossed by PE line, the board indicating device that leaks electricity, phase line cross the board indicating device that pours off, PE line over-current adjusting button, leak electricity button and the phase line over-current adjusting button adjusted;
Wherein, described PE line overcurrent audible-visual annunciator is positioned at the upper right side of described handle; The board indicating device that pours off crossed by described PE line, electric leakage is fallen board indicating device and phase line and crossed the board indicating device that pours off and be in line and be positioned at the below of described handle, and the board indicating device that pours off crossed by described PE line, board indicating device is fallen in electric leakage and phase line is crossed the board indicating device that pours off and set gradually from left to right;
Adjust button and phase line over-current adjusting button of described PE line over-current adjusting button, electric leakage is in line and is positioned at that the board indicating device that pours off crossed by described PE line, board indicating device is fallen in electric leakage and phase line crosses the below of the board indicating device that pours off, and adjust button and phase line over-current adjusting button of described PE line over-current adjusting button, electric leakage sets gradually from left to right.
Described magnetic test coil LQ is unipolar type, three facies patterns or three-phase and four-line type.
Described end of incoming cables comprises described PE end of incoming cables and multiple dry contact signal incoming end; Described leading-out terminal comprises described PE leading-out terminal and multiple signal output wiring box.
Electric welding machine Special-purpose air switch, also can adopt split-type structural.This split type electric welding machine Special-purpose air switch, comprises air switch and independently PE line overcurrent protector PEB; Described air switch and independently between PE line overcurrent protector PEB by linear quadratic control connection, combine electric welding machine Special-purpose air switch; Described PE line overcurrent protector PEB comprises PE line overcurrent protector shell, PE line crosses the pour off double reset button of board instruction, PE line overcurrent audible-visual annunciator, PE end of incoming cables, PE leading-out terminal, signal output wiring box.
PE line current is had to detect and thermal protective element in PE line overcurrent protector PEB.
Compared with the prior art, the utility model beneficial effect is embodied in:
Electric welding machine Special-purpose air switch of the present utility model, comprises air switch housing and switch panel.Configure A, B, C, N major loop feed Control and protection system in air switch housing routinely, comprise creepage protection function; PE line loop and binding post is set up in housing.Be configured with PE line overcurrent protector PEB in PE line loop, in PEB, have PE line current to detect and thermal protective element, sound and light alarm when can realize PE line overcurrent and the tripping operation of air switch inverse-time overcurrent.Described switch panel has
Fall board indicating device when alert device and electric leakage, PE line overcurrent, phase line overcurrent protection action, electric leakage, PE line overcurrent, phase line overcurrent protection value are adjusted knob.
Wherein unipolar type switch is used for the common AC welding set of 380V or 220V and small-sized metal rectifier welding set, and three facies patterns and three-phase and four-line type switch are used for DC generation type welding machine and large-scale metal rectifier welding set.Electric welding machine Special-purpose air switch of the present utility model has following feature:
(1) PEB is electric leakage and PE line overcurrent protector, be installed in air switch housing, coordinate with detection of electrical leakage coil LQ and realize earth leakage protective, and on PE line, configure overcurrent detection and Thermal protection trigger element, PE line overcurrent can be realized and report to the police and Thermal protection tripping operation; The function of PEB is sound and light alarm when realizing electric welding machine PE line overcurrent and inverse-time overcurrent tripping operation.Sound and light alarm can allow the shunting hidden danger of the earth mat in electrical welding operation person Timeliness coverage electric welding machine PE line take corresponding measure; Earth mat shunt current is comparatively large and the duration is longer time, PE line inverse-time overcurrent protection device drives air switch tripping operation, cuts off welder power, the safety of available protecting PE line and feed cable, and shows trip reason to operator.
(2) switch panel has PE line overcurrent audible-visual annunciator, fall board indicating device when electric leakage, PE line overcurrent, phase line overcurrent protection action, electric leakage, PE line overcurrent, phase line overcurrent protection value are adjusted knob.Air switch by trip positions manual reset to open position time, fall board indicating device and reset thereupon.The dry contact signal of the malfunctions such as configurable PE line overcurrent warning exports;
(3), after air switch configuration PEB function, electrical welding operation program also changes thereupon.Shunt hidden danger (two points ground fault) by welding front boundless and indistinct driftlessness ground Check System with or without earth mat, synchronously detect PE line current when changing welding into, after there is sound and light alarm, more targetedly emphasis is investigated.Thus saved the time, improve operating efficiency.
(4) the inverse-time overcurrent protection function of PEB; both ensure that PE line can not because earth mat shunt current is comparatively large and the duration is longer and burn; taken into account again welding initial, during sparking dredging ground strap loop, air switch can not be excessive and trip because of instantaneous earth mat shunt current.Thus maintain the normal rhythm of welding job.
(5) after electric welding machine is configured with electric welding machine Special-purpose air switch of the present utility model, the person that eliminates electrical welding operation is difficult to the puzzlement taken into account about both personal safety and device security, thus eliminate reason of removing electric welding machine PE line violating the regulations, improve the fail safe of welding job.
(6) configuration of PEB function, do not affect the configuration of other protection and controlling functions in air switch, this switch also can be used as normal air switch and uses.
(7) defencive function of electric welding machine Special-purpose air switch configures and setting range:
1. PE line overcurrent is reported to the police: 10A, within 0 second, reports to the police;
2. PE line overcurrent tripping: 20A, the inverse time lag;
3. leakage tripping: 20-100mA, tripping operation in 0 second.Acquiescence 30mA;
4. phase line overcurrent tripping: by the configuration of normal air switch routine, has electromagnetism quick-break and overcurrent heat to thread off.
Electric welding machine Special-purpose air switch of the present utility model, have can solve the shunting of electric welding machine secondary side earth mat burn protective earthing line problem, realize PE line overcurrent and report to the police and inverse time lag tripping operation, be applicable to various direct current-direct current (AC-DC) welding, there is the advantages such as stronger versatility.
Electric welding machine Special-purpose air switch of the present utility model, have can solve the shunting of electric welding machine secondary side earth mat burn protective earthing line problem, realize PE line overcurrent and report to the police and inverse time lag tripping operation, be applicable to various direct current-direct current (AC-DC) welding, there is the advantages such as stronger versatility.
Accompanying drawing explanation
Fig. 1 is the front view of electric welding machine Special-purpose air switch of the present utility model.
Fig. 2 is the left view of electric welding machine Special-purpose air switch of the present utility model.
The primary circuit schematic diagram that Fig. 3 is electric welding machine Special-purpose air switch of the present utility model when being unipolar type.
The primary circuit schematic diagram that Fig. 4 is electric welding machine Special-purpose air switch of the present utility model when being three facies patterns.
The primary circuit schematic diagram that Fig. 5 is electric welding machine Special-purpose air switch of the present utility model when being three-phase and four-line type.
Schematic diagram when Fig. 6 is connection power supply and the electric welding machine of electric welding machine Special-purpose air switch of the present utility model.
Fig. 7 is the fundamental diagram of the PE line overcurrent protector PEB of electric welding machine Special-purpose air switch of the present utility model.
Primary circuit schematic diagram (three facies patterns) when Fig. 8 is the employing split-type structural of electric welding machine Special-purpose air switch of the present utility model.
The PEB protector outline drawing independently arranged when Fig. 9 is the employing split-type structural of Fig. 8.
Power supply connection layout when Figure 10 is air switch connection electric welding machine and the power supply of routine.
Label in accompanying drawing 1 ~ accompanying drawing 10: 1 air switch housing, 2 switch panels, 3 ends of incoming cables; 31 PE ends of incoming cables, 4 leading-out terminals, 41PE leading-out terminal; 42 signal output wiring boxes, 5 PE line overcurrent audible-visual annunciators, 6 handles; the board indicating device that pours off crossed by 7 PE lines, and board indicating device is fallen in 8 electric leakages, and 9 phase lines cross the board indicating device that pours off; 10 PE line over-current adjusting buttons, 11 electric leakages are adjusted button, 12 phase line over-current adjusting buttons; 14PE line overcurrent protector shell, the double reset button of board instruction of pouring off crossed by 13PE line.
Below by way of embodiment, and the utility model is described in further detail by reference to the accompanying drawings.
Embodiment
See Fig. 1 ~ Fig. 9, electric welding machine Special-purpose air switch of the present utility model, comprise air switch housing 1 and switch panel 2, in described air switch housing 1, be provided with magnetic test coil LQ, described air switch housing 1 is provided with PE end of incoming cables 31 and PE leading-out terminal 41; Be provided with between described PE end of incoming cables 31 and PE leading-out terminal 41 and be positioned at electric leakage within described air switch housing and PE line overcurrent protector PEB, within described electric leakage and PE line overcurrent protector PEB, be provided with current detecting and thermal protective element; The top of described switch panel 2 is provided with end of incoming cables 3, and the bottom of switch panel 2 is provided with leading-out terminal 4; Described switch panel 2 is also provided with PE line overcurrent audible-visual annunciator 5, handle 6 from top to down, the board indicating device 7 that pours off crossed by PE line, the board indicating device 8 that leaks electricity, phase line cross the board indicating device 9 that pours off, PE line over-current adjusting button 10, leak electricity button 11 and the phase line over-current adjusting button 12 adjusted;
Wherein, described PE line overcurrent audible-visual annunciator 5 is positioned at the upper right side of described handle 6; The board indicating device 7 that pours off crossed by described PE line, electric leakage is fallen board indicating device 8 and phase line and crossed the board indicating device 9 that pours off and be in line and the below being positioned at described handle 6, and the board indicating device 7 that pours off crossed by described PE line, board indicating device 8 is fallen in electric leakage and phase line is crossed the board indicating device 9 that pours off and set gradually from left to right;
Adjust button 11 and phase line over-current adjusting button 12 of described PE line over-current adjusting button 10, electric leakage is in line and is positioned at that the board indicating device 7 that pours off crossed by described PE line, board indicating device 8 is fallen in electric leakage and phase line crosses the below of the board indicating device 9 that pours off, and adjust button 11 and phase line over-current adjusting button 12 of described PE line over-current adjusting button 10, electric leakage sets gradually from left to right.
Described magnetic test coil LQ is unipolar type, three facies patterns or three-phase and four-line type.
Described end of incoming cables 3 comprises described PE end of incoming cables 31 and multiple dry contact signal incoming end; Described leading-out terminal 4 comprises described PE leading-out terminal 41 and multiple signal output wiring box 42.
Electric welding machine Special-purpose air switch of the present utility model, it comprises air switch housing and switch panel, is provided with detection of electrical leakage coil LQ in described air switch housing, and described air switch housing is provided with PE line terminals; Described PE line terminals is connected with and is arranged at electric leakage within described air switch housing and PE line overcurrent protector PEB, within described electric leakage and PE line overcurrent protector PEB, be provided with PE line current detection system, residual current detection system and trigger element.Described switch panel has PE line overcurrent audible-visual annunciator, and electric leakage, PE line overcurrent, phase line overcurrent protection action time fall board indicating device, electric leakage, PE line overcurrent, phase line overcurrent protection value are adjusted knob.During PE line current >=10A, audible-visual annunciator is driven to report to the police, inverse-time overcurrent tripping operation during PE line current >=20A; Earth leakage protective by 30mA, within 0 second, adjust.Fall board instruction and protection value when described switch panel being provided with PE line overcurrent audible-visual annunciator and electric leakage, the overcurrent protection action of PE line are adjusted knob, and configurable PE line overcurrent is reported to the police and to be exported with the dry contact signal of the malfunction such as tripping operation, leakage tripping, phase line overcurrent tripping.
Described switch panel is also configured with the dry contact signal output terminal of various malfunction, can fault-signal teletransmission to the place needed, such as electric welding job site.
Electric welding machine Special-purpose air switch of the present utility model; also can adopt the structure (as shown in FIG. 8 and 9) of separate assembling; comprise air switch and independently PE line overcurrent protector PEB, by linear quadratic control connection between the two, combine electric welding machine Special-purpose air switch.Independently PE line overcurrent protector PEB profile is shown in Fig. 9, comprise PE line overcurrent protector shell 14, PE line cross pour off board instruction hold concurrently reset button 13, PE line overcurrent audible-visual annunciator 5, PE end of incoming cables 31, PE leading-out terminal 41, signal output wiring box 42.Air switch requires to have creepage protection function, shunt opening trip coil or no-voltage trip coil.PEB seals in electric welding machine PE line loop; PE line current is had to detect and thermal protective element in PEB; sound and light alarm during PE line overcurrent can be realized; shunt opening trip coil to air switch sends inverse-time overcurrent trip signal and has reducible memory to show; also be configured with sound and light alarm dry contact signal output terminal during PE line overcurrent; can fault-signal teletransmission to the place needed, such as electric welding job site.
When in electrical welding operation during welding circuit generation two points ground fault, earth mat shunting (I in figure
f) flow into electric welding machine PE line through ground networks, then the b point of electric welding machine secondary coil is back to through PEB.Work as I
fcurrent value is comparatively large, (such as I when likely threatening PE line safe
f>=10A), the audible-visual annunciator of PEB is reported to the police, and points out the existence of two points ground fault and earth mat shunting to operator.Work as I
f(such as I during the safe carrying capacity of electric current for a long time more than PE line
f>=20A), PE line faces the danger of burning, now the inverse-time overcurrent protection action of PEB, drives air switch tripping operation, and welding operation is forced to stop.
Electric welding machine Special-purpose air switch of the present utility model, the basis of regular air switch is set up PE line terminals, and internal configurations overcurrent detects and thermal protective element, realizes PE line overcurrent and reports to the police and inverse time lag tripping operation, can be used for various direct current-direct current (AC-DC) welding; Wherein unipolar type switch is used for the common AC welding set of 380V or 220V and small-sized metal rectifier welding set, and three facies patterns and three-phase and four-line type switch are used for DC generation type welding machine and large-scale metal rectifier welding set.Electric welding machine Special-purpose air switch of the present utility model has following feature:
(1) PEB is PE line overcurrent protector, can be installed in air switch housing and form integral type; Also can with air switch split separate configurations, be connected by linear quadratic control line between the two.In PEB, configuration PE line overcurrent detects and thermal protective element, can realize PE line overcurrent and report to the police and inverse-time overcurrent tripping operation;
(2) switch panel has PE line overcurrent audible-visual annunciator, and during the protection act such as electric leakage, PE line overcurrent, phase line overcurrent 3 fall board indicating device.Air switch by power down position manual reset to open position time, fall board indicating device and reset thereupon.The dry contact signal of the malfunctions such as configurable PE line overcurrent warning and tripping operation, leakage tripping, phase line overcurrent tripping exports;
(3) do not affect the configuration of other protection and controlling functions in switch, this switch also can be used as normal air switch and uses.
(4) be not only applicable to various A.C. welder, also can be used for DC welding machine, highly versatile.
(5) the electrical welding operation process after this electric welding machine Special-purpose air switch is used to comprise following step:
1. can start welding after electric welding machine Special-purpose air switch power transmission, not need whether have two points ground fault in special check system;
2. occur two points ground fault in system, and in PE line during earth mat shunting >=10A, switch sends PE line overcurrent sound and light alarm, has two points ground fault problem in prompt system;
If 3. PE line overcurrent duration shorter (sparking examination logical) when such as starting, inverse-time overcurrent protection can not trip immediately, makes sparking try logically to wait work normally to carry out;
4. as electric current >=20A in PE line and the duration is longer time, switch inverse-time overcurrent trips, and ensures that PE line and feed cable are not burnt." PE line overcurrent " falls board, prompt switch trip reason simultaneously;
5., when " PE line overcurrent " is reported to the police for a long time or PE line overcurrent tripping is occurred, operator should check two points ground fault problem and manage to get rid of.When cannot get rid of, can remove the PE line of electric welding machine, operation terminates rear timely recovery temporarily;
6. after removing the PE line of electric welding machine, the prevention of electric shock of operator relies on temporarily: another actual earth point of (I) electric welding machine secondary system, the creepage protection function (backup protection, 30mA tripping operation in 0 second) of (II) electric welding machine Special-purpose air switch;
7., after earth leakage protective tripping operation, " earth leakage protective " falls board, prompt switch trip reason;
8., after trip protection, switching manipulation handle mediates trip positions, and lower handle, when being reset to open position, falling board indicating device and reset thereupon, ready for closing a floodgate next time.
Electric welding machine Special-purpose air switch of the present utility model, can solve the earth mat shunting of electric welding machine secondary side and burn this worldwide construction safety difficult problem of protective earthing line, can produce larger economic benefit and social benefit.
Embodiment recited above is only be described preferred implementation of the present utility model, not limits design of the present utility model and scope.Under the prerequisite not departing from the utility model design concept; the various modification that this area ordinary person makes the technical solution of the utility model and improvement; protection range of the present utility model all should be dropped into; the technology contents of the utility model request protection, all records in detail in the claims.
Claims (1)
1. electric welding machine Special-purpose air switch, it is characterized in that, comprise air switch housing (1) and switch panel (2), in described air switch housing (1), be provided with magnetic test coil LQ, described air switch housing (1) is provided with PE end of incoming cables (31) and PE leading-out terminal (41); Be provided with between described PE end of incoming cables (31) and PE leading-out terminal (41) and be positioned at electric leakage within described air switch housing and PE line overcurrent protector PEB, within described electric leakage and PE line overcurrent protector PEB, be provided with current detecting and thermal protective element; The top of described switch panel (2) is provided with end of incoming cables (3), and the bottom of switch panel (2) is provided with leading-out terminal (4); Described switch panel (2) is also provided with PE line overcurrent audible-visual annunciator (5), handle (6) from top to down, the board indicating device (7) that pours off crossed by PE line, the board indicating device (8) that leaks electricity, phase line cross the board indicating device (9) that pours off, PE line over-current adjusting button (10), leak electricity button (11) and the phase line over-current adjusting button (12) adjusted;
Wherein, described PE line overcurrent audible-visual annunciator (5) is positioned at the upper right side of described handle (6); The board indicating device (7) that pours off crossed by described PE line, electric leakage is fallen board indicating device (8) and phase line and crossed the board indicating device (9) that pours off and be in line and be positioned at the below of described handle (6), and described PE line crosses the board indicating device (7) that pours off, leak electricity board indicating device (8) and phase line are crossed the board indicating device (9) that pours off and set gradually from left to right;
Adjust button (11) and phase line over-current adjusting button (12) of described PE line over-current adjusting button (10), electric leakage is in line and is positioned at that the board indicating device (7) that pours off crossed by described PE line, board indicating device (8) is fallen in electric leakage and phase line crosses the below of board indicating device (9) of pouring off, and described PE line over-current adjusting button (10), adjust button (11) and the phase line over-current adjusting button (12) of leaking electricity set gradually from left to right.
2, electric welding machine Special-purpose air switch according to claim 1, is characterized in that, described magnetic test coil LQ is unipolar type, three facies patterns or three-phase and four-line type.
3, electric welding machine Special-purpose air switch according to claim 1, is characterized in that, described end of incoming cables (3) comprise described PE end of incoming cables (31) and multiple dry contact signal incoming end; Described leading-out terminal (4) comprises described PE leading-out terminal (41) and multiple signal output wiring box (42).
4, electric welding machine Special-purpose air switch, is characterized in that, comprises air switch and independently PE line overcurrent protector PEB; Described air switch and independently between PE line overcurrent protector PEB by linear quadratic control connection, combine electric welding machine Special-purpose air switch; Described PE line overcurrent protector PEB comprises PE line overcurrent protector shell (14), PE line crosses the pour off double reset button (13) of board instruction, PE line overcurrent audible-visual annunciator (5), PE end of incoming cables (31), PE leading-out terminal (41), signal output wiring box (42).
5, electric welding machine Special-purpose air switch according to claim 4, is characterized in that, has PE line current to detect and thermal protective element in PE line overcurrent protector PEB.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520011541.4U CN204407702U (en) | 2015-01-08 | 2015-01-08 | Electric welding machine Special-purpose air switch |
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|---|---|---|---|
| CN201520011541.4U CN204407702U (en) | 2015-01-08 | 2015-01-08 | Electric welding machine Special-purpose air switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600573A (en) * | 2015-01-08 | 2015-05-06 | 淮北申正电力电控设备有限公司 | Welding machine dedicated air switch |
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2015
- 2015-01-08 CN CN201520011541.4U patent/CN204407702U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600573A (en) * | 2015-01-08 | 2015-05-06 | 淮北申正电力电控设备有限公司 | Welding machine dedicated air switch |
| CN104600573B (en) * | 2015-01-08 | 2017-10-10 | 淮北申正电力电控设备有限公司 | Electric welding machine Special-purpose air switch |
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