CN114355131A - EWIS electric arc test device suitable for low atmospheric pressure environment - Google Patents
EWIS electric arc test device suitable for low atmospheric pressure environment Download PDFInfo
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- CN114355131A CN114355131A CN202210274556.4A CN202210274556A CN114355131A CN 114355131 A CN114355131 A CN 114355131A CN 202210274556 A CN202210274556 A CN 202210274556A CN 114355131 A CN114355131 A CN 114355131A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to an EWIS arc test device suitable for a low-pressure environment. The EWIS electric arc test device suitable for the low-pressure environment comprises a sealed cavity, a plurality of transparent observation windows symmetrically arranged on the side wall of the sealed cavity, a movable electrode mechanism and a fixed electrode mechanism symmetrically connected to the side wall of the sealed cavity, an air inlet valve, a vacuum pumping port, a pressure sensor and a manual valve connected to the side wall of the sealed cavity, a tested article limiting mechanism connected to the middle position of the top end of the sealed cavity, and a tested article replacing mechanism and a pressure release valve respectively arranged on two sides of the tested article limiting mechanism; this EWIS electric arc test device suitable for under the low atmospheric pressure environment can effectual solution atmospheric pressure environmental factor to the experimental influence of trouble electric arc, installation that can automize and dismantlement by the article, the security improves greatly when can be convenient the regulation by article, fixed electrode and remove the distance between the electrode, experimental precision is higher.
Description
Technical Field
The invention belongs to the technical field of fault arc application, and particularly relates to an EWIS arc test device suitable for a low-pressure environment.
Background
The arc generally refers to a phenomenon in which a sustained discharge occurs due to breakdown of an insulating medium, which is formed between two electrodes. Safety of aircraft Electrical Wiring Interconnection Systems (EWIS) and other critical systems creates a potential hazard due to the generation of fault arcs.
The arcs are mainly classified into series arcs and parallel arcs. The series arc can be verified through an arc generator testing device besides a carbonization path test and a terminal loosening vibration test, and is mainly based on the UL1699 standard and the GB/T31143-2014 standard, the basic principle is that a movable electrode is slowly adjusted from the contact of two electrodes, when the movable electrode is separated from a fixed electrode to a certain gap, series fault arc is formed due to the breakdown of the gap, and the situation that the fault arc is generated due to poor contact of two conductors, breakage of a contact part and the like of an aviation cable is simulated.
However, such EWIS arc test apparatus clearly suffers from the following disadvantages:
one is to consider the effect of the environmental factor of pressure. Many related arc test device designs and applications only aim at standard atmospheric pressure, and do not consider test environments in other atmospheric pressure environments, such as the flying height of an aviation aircraft such as an airplane is relatively high, the atmospheric pressure environment in which a fault arc occurs is no longer standard atmospheric pressure, and pressure is one of important influencing factors influencing the fault arc, so the EWIS arc test device needs to take the atmospheric pressure into account;
secondly, the research range or the field is single, the prior EWIS arc test device mainly researches fault arc waveform identification and detection technology, and related research is not carried out in the fields of damage heat effect and the like of a tested product caused by fault arc.
Disclosure of Invention
The invention aims to solve the problems and provide an EWIS arc testing device which is simple in structure and reasonable in design and is suitable for being used in a low-pressure environment.
The invention realizes the purpose through the following technical scheme:
an EWIS electric arc test device suitable for a low-pressure environment comprises a sealed cavity, a plurality of transparent observation windows symmetrically arranged on the side wall of the sealed cavity, a movable electrode mechanism and a fixed electrode mechanism symmetrically connected to the side wall of the sealed cavity, an air inlet valve, a vacuum suction opening, a pressure sensor and a manual valve connected to the side wall of the sealed cavity, a tested article limiting mechanism connected to the middle position of the top end of the sealed cavity, and a tested article replacing mechanism and a pressure relief valve respectively arranged on two sides of the tested article limiting mechanism, wherein a square groove matched with the tested article replacing mechanism is arranged at the top end of the sealed cavity;
the vacuum pumping port is used for connecting a vacuum pump set and pumping out gas in the sealed cavity;
the pressure sensor is used for monitoring the air pressure in the sealed cavity in real time;
the air inlet valve and the pressure release valve are used for adjusting air pressure in the sealed cavity;
the movable electrode mechanism and the fixed electrode mechanism are used for generating fault electric arcs in the sealed cavity;
the one end of quilt sample stop gear extends to in the sealed cavity, the one end that the mechanism was changed to the quilt sample is connected with the adjustment mechanism that a plurality of symmetry set up, be equipped with liftout mechanism in one of them adjustment mechanism, be equipped with the quilt sample in the adjustment mechanism that is equipped with liftout mechanism, the one end of quilt sample stop gear is removed to the sealed cavity in from the square trough and is installed the quilt sample to the one end of quilt sample stop gear, when changing the quilt sample, the mechanism is changed to the quilt sample and is pulled down the spacing quilt sample on the quilt sample stop gear, save in adjustment mechanism, then install new quilt sample to the one end of quilt sample stop gear through the adjustment mechanism that is equipped with liftout mechanism, the quilt sample that will pull down when the one end of quilt sample change mechanism shifts out from the square trough takes out and seals the square trough.
As a further optimization scheme of the invention, the movable electrode mechanism comprises a first interface flange connected to the side wall of the sealed cavity, a first support connected to the first interface flange, a first motor connected to one end of the first support, a first lead screw connected to an output shaft of the first motor, a first slider slidably connected to the first support, a first movable flange connected to the first slider, a movable electrode fixedly connected to the middle position of the first movable flange, and a first corrugated pipe connected between the first movable flange and the first interface flange, the first slider is provided with a screw hole matched with the first lead screw, one end of the movable electrode penetrates through the first interface flange and extends into the sealed cavity, the first corrugated pipe is sleeved outside the movable electrode, and the fixed electrode mechanism and the movable electrode mechanism are coaxially and symmetrically arranged.
As a further optimization scheme of the invention, the fixed electrode mechanism comprises a fixed interface flange connected to the side wall of the sealed cavity and a fixed electrode connected to the middle position of the fixed interface flange, and one end of the fixed electrode extends into the sealed cavity and is coaxial with the movable electrode.
As a further optimization scheme of the invention, the limiting mechanism of the tested object comprises a second interface flange connected at the middle position of the top end of the sealed cavity, a third bracket connected on the second interface flange, a seventh motor connected at one end of the third bracket, a fourth screw rod connected at the output shaft end of the seventh motor, a third slide block connected on the third bracket in a sliding way, and a second moving flange connected on the third slide block, fixed connection is at the spliced pole of second removal flange middle part position, connect the second bellows between second removal flange and second interface flange, connect the connecting block in spliced pole one end, detachable connection is at the spacing support on the connecting block, connect the insulating part and the a plurality of stop screw of symmetric connection on spacing support of spacing support bottom, be equipped with on the third slider with fourth lead screw matched with screw, a plurality of stop screw is used for spacing the tested article in spacing support.
As a further optimization scheme of the invention, the tested object replacing mechanism comprises a fixed plate arranged above the square groove, a second support connected to the fixed plate, a second motor connected to one end of the second support, a second lead screw connected to the output shaft end of the second motor, a second slide block connected to the second support in a sliding manner, a moving plate connected to the second slide block, a connecting rod fixedly connected to the middle position of the moving plate, a plurality of support rods connected between the fixed plate and the top end wall of the sealed cavity, and a square plate movably connected to one end of the connecting rod, wherein the square plate and the square groove are arranged in a matched manner, one end of the connecting rod penetrates through the fixed plate, a screw hole matched with the second lead screw is formed in the second slide block, a plurality of adjusting mechanisms are symmetrically connected to the square plate, and a material ejecting mechanism is positioned in one of the adjusting mechanisms.
As a further optimization scheme of the invention, the adjusting mechanism comprises a storage barrel connected to the square plate, a storage groove arranged in the storage barrel, a plurality of support plates symmetrically connected to the upper end of the storage barrel, an L-shaped frame body connected to the positions, close to the upper end, of the side walls of the support plates, a third motor connected to the L-shaped frame body, a third lead screw connected to the output shaft end of the third motor, a movable support connected to the third lead screw, a fourth motor connected to the movable support, a transmission shaft connected to the output shaft end of the fourth motor, and a plurality of driven shafts movably connected to the movable support, wherein chain wheels are connected to the transmission shaft and the driven shafts, a wrench matched with the limit screw is connected to one end of each of the transmission shaft and the driven shafts, and the chain wheels are connected with one another through a chain.
As a further optimization scheme of the invention, the material ejecting mechanism comprises a transmission screw rod and a limiting rod which are movably connected to the bottom end of the material storage tank, a top plate sleeved outside the transmission screw rod and the limiting rod, a platform connected to the upper end of the top plate, a driven gear connected to the outer wall of the transmission screw rod, a truss connected to the side wall of the material storage tank, a fifth motor connected to the truss and a first transmission gear connected to an output shaft of the fifth motor, wherein the first transmission gear is meshed with the driven gear, a moving chamber matched with the transmission screw rod and a limiting hole matched with the limiting rod are arranged in the top plate, and threads matched with the transmission screw rod are arranged on the inner wall of the moving chamber.
As a further optimized scheme of the invention, a fixed gear is connected to a position, close to the square plate, on the outer wall of the connecting rod, a sixth motor is connected to the outer wall of the material storage barrel, a second transmission gear meshed with the fixed gear is connected to an output shaft of the sixth motor, and the sixth motor drives the second transmission gear to rotate circumferentially around the fixed gear and drives the material storage barrel and the square plate to rotate in the same direction and at the same angle.
The invention has the beneficial effects that: the invention can effectively solve the influence of atmospheric pressure environmental factors on the fault arc test, can automatically install and disassemble the tested object, greatly improves the safety, can conveniently adjust the distance among the tested object, the fixed electrode and the movable electrode, and has higher test precision.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a bottom view of FIG. 1 of the present invention;
FIG. 3 is a schematic view of a partial structure of the sample exchange mechanism according to the present invention;
FIG. 4 is a mating view of the adjustment mechanism and the ejector mechanism of the present invention;
FIG. 5 is a schematic view of the adjustment mechanism of the present invention;
FIG. 6 is a schematic structural view of the ejector mechanism of the present invention;
FIG. 7 is a schematic structural diagram of a limiting mechanism for a sample according to the present invention;
FIG. 8 is a schematic structural diagram of the moving electrode mechanism of the present invention.
In the figure: 1. sealing the cavity; 101. a square groove; 102. a transparent viewing window; 2. an intake valve; 3. a movable electrode mechanism; 301. a first interface flange; 302. a first bracket; 303. a first motor; 304. a first lead screw; 305. a first slider; 306. a first moving flange; 307. a first bellows; 308. a movable electrode; 4. a fixed electrode mechanism; 5. vacuum pumping; 6. a pressure sensor; 7. a test article replacement mechanism; 701. a fixing plate; 702. a second bracket; 703. a second motor; 704. moving the plate; 705. a support bar; 706. a connecting rod; 707. a square plate; 708. an adjustment mechanism; 7080. a storage barrel; 7081. a material storage groove; 7082. a support plate; 7083. an L-shaped frame body; 7084. a third motor; 7085. a third screw rod; 7086. moving the support; 7087. a fourth motor; 7088. a drive shaft; 7089. a wrench; 70810. a driven shaft; 70811. a chain; 709. a material ejecting mechanism; 7090. a drive screw; 7091. a driven gear; 7092. a truss; 7093. a fifth motor; 7094. a first drive gear; 7095. a top plate; 7096. a limiting rod; 7097. moving the chamber; 7098. a limiting hole; 7099. a platform; 710. a sixth motor; 711. a second transmission gear; 712. fixing a gear; 8. a tested object limiting mechanism; 801. a second interface flange; 802. a third support; 803. a seventh motor; 804. a fourth screw rod; 805. a third slider; 806. a second moving flange; 807. a second bellows; 808. connecting columns; 809. connecting blocks; 810. a limiting bracket; 811. a limit screw; 812. an insulating member; 9. a pressure relief valve; 10. and (4) a manual valve.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
As shown in fig. 1 and 2, an EWIS arc test device suitable for a low-pressure environment comprises a sealed cavity 1, a plurality of transparent observation windows 102 symmetrically arranged on the side wall of the sealed cavity 1, a movable electrode mechanism 3 and a fixed electrode mechanism 4 symmetrically connected to the side wall of the sealed cavity 1, an air inlet valve 2 connected to the side wall of the sealed cavity 1, a vacuum pumping port 5, a pressure sensor 6 and a manual valve 10, a tested article limiting mechanism 8 connected to the middle position of the top end of the sealed cavity 1, and a tested article replacing mechanism 7 and a pressure release valve 9 respectively arranged on two sides of the tested article limiting mechanism 8, wherein a square groove 101 matched with the tested article replacing mechanism 7 is arranged at the top end of the sealed cavity 1;
the vacuum pumping port 5 is used for connecting a vacuum pump set and pumping out gas in the sealed cavity 1;
the pressure sensor 6 is used for monitoring the air pressure in the sealed cavity 1 in real time;
the air inlet valve 2 and the pressure release valve 9 are used for adjusting the air pressure in the sealed cavity 1;
the movable electrode mechanism 3 and the fixed electrode mechanism 4 are used for generating fault electric arcs in the sealed cavity 1;
one end of the tested article limiting mechanism 8 extends into the sealed cavity 1, one end of the tested article replacing mechanism 7 is connected with a plurality of symmetrically-arranged adjusting mechanisms 708, an ejection mechanism 709 is arranged in one of the adjusting mechanisms 708, a tested article is arranged in the adjusting mechanism 708 provided with the ejection mechanism 709, one end of the tested article limiting mechanism 8 moves into the sealed cavity 1 from the square groove 101 and installs the tested article to one end of the tested article limiting mechanism 8, when the tested article is replaced, the tested article limiting mechanism 8 detaches the tested article limited on the tested article limiting mechanism 8 and stores the detached tested article in the adjusting mechanism 708, then a new tested article is installed to one end of the tested article limiting mechanism 8 through the adjusting mechanism 708 provided with the ejection mechanism 709, and when one end of the tested article replacing mechanism 7 moves out from the square groove 101, the detached tested article is taken out from the square groove 101 and seals the square groove 101.
Before the EWIS arc test device is used for carrying out a test, a vacuum pump set carries out vacuum pumping on a sealed cavity 1 through a vacuum pumping port 5, and reaches an air pressure environment required by the test, a movable electrode 308 is controlled to be slowly close to a fixed electrode until the two electrodes are mutually contacted, an external access end of the movable electrode 308 and an external access end of the fixed electrode are respectively electrically connected, a tested product is placed at a proper position in the sealed cavity 1 through a tested product limiting mechanism 8, the movable electrode 308 is slowly controlled to be far away from the fixed electrode, so that a fault arc is generated, the fault arc is extinguished as the movable electrode 308 is gradually far away from the fixed electrode, a pressure sensor 6 on the sealed cavity 1 detects the pressure in the sealed cavity 1 in the test process and feeds back the pressure to a control system of the vacuum pump set, the stability of the low air pressure environment in the cavity is ensured, and a high-speed camera is arranged in front of a transparent observation window 102, the high-speed camera both can shoot the change of the whole form of trouble electric arc, can also shoot the heat damage effect process of trouble electric arc to the tested object, after the trouble electric arc extinguishes, remove the outside electrical connection of two electrodes, and ground connection, open admission valve 2, when the inside and outside atmospheric pressure of seal chamber 1 is identical completely, the tested object in tested object stop gear 8 is taken off through tested object change mechanism 7, and install a new tested object in tested object stop gear 8, then take out the tested object that will take off from seal chamber 1, realize the automatic change tested object, the security is higher, and test efficiency has been improved greatly.
Wherein, as shown in fig. 1, fig. 2 and fig. 8, the movable electrode mechanism 3 comprises a first interface flange 301 connected to the side wall of the sealed cavity 1, a first bracket 302 connected to the first interface flange 301, a first motor 303 connected to one end of the first bracket 302, the first lead screw 304 connected to the output shaft of the first motor 303, the first slider 305 slidably connected to the first bracket 302, the first moving flange 306 connected to the first slider 305, the moving electrode 308 fixedly connected to the middle position of the first moving flange 306, and the first bellows 307 connected between the first moving flange 306 and the first interface flange 301, the first slider 305 is provided with a screw hole matched with the first lead screw 304, one end of the moving electrode 308 penetrates through the first interface flange 301 and extends into the sealed cavity 1, the first bellows 307 is sleeved outside the moving electrode 308, and the fixed electrode mechanism 4 and the moving electrode mechanism 3 are coaxially and symmetrically arranged.
The fixed electrode mechanism 4 comprises a fixed interface flange connected to the side wall of the sealed cavity 1 and a fixed electrode connected to the middle position of the fixed interface flange, and one end of the fixed electrode extends into the sealed cavity 1 and is coaxial with the movable electrode 308.
It should be noted that, when the fault arc is generated as described above, the first motor 303 drives the first lead screw 304 to rotate, the first lead screw 304 rotates to drive the first slider 305 to move along the axial direction of the first lead screw 304, and simultaneously drives the first moving flange 306 and the moving electrode 308 connected to the middle portion of the first moving flange to move in the same direction and at the same distance, so that the distance between the moving electrode 308 and the fixed electrode can be adjusted.
The first bellows 307 can seal the rod body of the movable electrode 308 between the first interface flange 301 and the first movable flange 306, so as to prevent accidental contact during power-on, improve safety, prevent the movement of the movable electrode 308 from being affected, and greatly improve the movement distance and the movement speed precision of the movable electrode 308.
As shown in fig. 1, fig. 2 and fig. 7, the limiting mechanism 8 for the tested object includes a second interface flange 801 connected to the middle position of the top end of the sealed cavity 1, a third bracket 802 connected to the second interface flange 801, a seventh motor 803 connected to one end of the third bracket 802, a fourth lead screw 804 connected to the output shaft end of the seventh motor 803, a third slider 805 slidably connected to the third bracket 802, a second moving flange 806 connected to the third slider 805, a connecting post 808 fixedly connected to the middle position of the second moving flange 806, a second corrugated tube 807 connected between the second moving flange 806 and the second interface flange 801, a connecting block 809 connected to one end of the connecting post 808, a limiting bracket 810 detachably connected to the connecting block 809, an insulating member 812 connected to the bottom end of the limiting bracket 810, and a plurality of limiting screws 811 symmetrically connected to the limiting bracket 810, the third slider 805 is provided with a screw hole matched with the fourth screw rod 804, and a plurality of limiting screws 811 are used for limiting the tested object in the limiting bracket 810.
It should be noted that the insulating member 812 can withstand the high-temperature and high-voltage environment when the fault arc is generated, and mainly prevents the electric contact and the electric breakdown between the electrode and the limiting mechanism 8 of the tested object.
It should be noted that, when the tested article limiting mechanism 8 limits the tested article, the adjusting mechanism 708 provided with the material ejecting mechanism 709 moves to a position right below the limiting bracket 810, the tested article is inserted into the limiting bracket 810 from the middle position of the insulating member 812 by the material ejecting mechanism 709, and then the tested article is clamped by rotating the limiting screw 811, so that the tested article is limited in the limiting bracket 810, and the length of the limiting screw 811 screwed into the limiting bracket 810 is adjustable, so that the tested articles with different structures and different specifications can be limited and fixed.
As shown in fig. 1, 2, 3 and 4, the sample exchange mechanism 7 includes a fixing plate 701 disposed above the square groove 101, a second bracket 702 connected to the fixing plate 701, a second motor 703 connected to one end of the second bracket 702, the second lead screw of connection at second motor 703 output shaft end, sliding connection is at the second slider on second support 702, connect the movable plate 704 on the second slider, fixed connection is at the connecting rod 706 of movable plate 704 middle part position, connect a plurality of bracing piece 705 and swing joint at the square slab 707 of connecting rod 706 one end between fixed plate 701 and seal chamber 1 top end wall, square slab 707 and square groove 101 cooperate the setting, fixed plate 701 is run through to the one end of connecting rod 706, be equipped with the screw with second lead screw matched with on the second slider, a plurality of adjustment mechanism 708 symmetric connection is on square slab 707, liftout mechanism 709 is located one of them adjustment mechanism 708.
It should be noted that, when a tested product is mounted, the second motor 703 drives the second lead screw to rotate, the second lead screw drives the second slider to drive the moving plate 704 and the connecting rod 706 to move towards the inside of the sealed cavity 1 by the same distance, the connecting rod 706 drives the square plate 707 to separate from the square groove 101 and move towards the inside of the sealed cavity 1 when moving, at this time, the limiting mechanism 8 of the tested product moves upwards and moves towards the square plate 707, so that the mounting process can be performed at a position away from the moving electrode 308 and the fixed electrode, and the mounting process is prevented from being affected, when the square plate 707 moves to a specific position, the adjusting mechanism 708 connected thereto and provided with the ejector mechanism 709 rotates to a position right below the limiting bracket 810, then the ejector mechanism 709 ejects the tested product into the limiting bracket 810, and in the ejecting process, the adjusting mechanism 708 moves upwards together until the adjusting mechanism is sleeved outside the limiting bracket 810, and then the limiting screw 811 on the limiting bracket 810 is adjusted through the adjusting mechanism 708, so that the limiting screw 811 fixes and limits the tested object.
When a tested article is replaced, the second motor 703 drives the second screw rod to rotate, the second screw rod drives the second slider to drive the moving plate 704 and the connecting rod 706 to move towards the inside of the sealed cavity 1 by the same distance, the connecting rod 706 drives the square plate 707 to separate from the square groove 101 and move towards the inside of the sealed cavity 1 when moving, when the square plate 707 moves to a specified position, the adjusting mechanism 708 connected to the square plate rotates to the position right below the limiting bracket 810 and moves upwards until the square plate is sleeved outside the limiting bracket 810, the limiting screw 811 on the limiting bracket 810 is adjusted to separate the limiting screw 811 from the tested article, at this time, the tested article is no longer limited and falls into the adjusting mechanism 708, then the square plate 707 moves downwards to rotate after the adjusting mechanism 708 and the limiting bracket 810 separate, the adjusting mechanism provided with the material ejecting mechanism 709 rotates to the position right below the limiting bracket 810, and the process of installing the tested article is repeated, after installation, the square plate 707 is separated from the limit bracket 810, the square plate 707 is controlled to move back when rotating to a position adaptive to the square groove 101, tested articles are taken out together when moving back to the square groove 101, and meanwhile, the square plate 707 seals the square groove 101.
As shown in fig. 5, the adjusting mechanism 708 includes a material storage barrel 7080 connected to the square plate 707, a material storage groove 7081 disposed in the material storage barrel 7080, a plurality of support plates 7082 symmetrically connected to an upper end of the material storage barrel 7080, an L-shaped frame 7083 connected to a side wall of the support plate 7082 near an upper end, a third motor 7084 connected to the L-shaped frame 7083, a third lead screw 7085 connected to an output shaft end of the third motor 7084, a moving support 7086 connected to the third lead screw 7085, a fourth motor 7087 connected to the moving support 7086, a transmission shaft 7088 connected to an output shaft end of the fourth motor 7087, and a plurality of driven shafts 70810 movably connected to the moving support 7086, wherein the transmission shaft 7088 and the plurality of driven shafts 70810 are connected to chain wheels, one end of the support plate 7082 is connected to a wrench 7089 matched with the limit screw 811, and the plurality of chain wheels are connected to each other by a chain 70811.
It should be noted that, when the above installation or replacement of the tested object is performed, the adjusting mechanism 708 moves to a position right below the limit bracket 810 along with the square plate 707, and then moves upward along with the square plate 707 until each support plate 7082 moves to a peripheral position corresponding to the limit bracket 810, at this time, each wrench 7089 corresponds to each limit screw 811 on the limit bracket 810, and then the third lead screw 7085 is driven to rotate by the third motor 7084, the movable bracket 7086 is driven to move in the direction of the limit bracket 810 after the third lead screw 7085 rotates, the fourth motor 7087, the transmission shaft 7088, the driven shaft 70810 and each wrench 7089 connected to the limit bracket 810 move in the same direction until the wrench 7089 is combined with each limit screw 811, at this time, the transmission shaft 7088 is driven to rotate by the fourth motor 7087, the transmission shaft 7088 drives each driven shaft 70810 to rotate in the same direction by the chain 70811 when rotating, and enables each wrench 7089 to rotate in the same direction, a position as that of the wrench, With the rotation of angle, can remove to spacing support 810 middle part when rotating because of spacing screw 811, need control third motor 7084 drive this moment and remove support 7086 and carry out syntropy, with the removal of distance to this cooperates spacing screw 811's removal, prevents that spanner 7089 and spacing screw 811 break away from, and after removing, remove through third motor 7084 drive removal support 7086 reverse movement, make spanner 7089 and spacing screw 811 break away from can.
It should be noted that, in the process of engaging and disengaging the limit screw 811 with the wrench 7089, the wrench 7089 and the limit screw 811 do not rotate, so that the engagement between the limit screw 811 and the wrench 7089 is not affected, and if the positions of the wrench 7089 are different due to a change in the specification of a test article during replacement, the rotation angle of each wrench 7089 can be adjusted according to the fourth motor 7087, so that the wrench 7089 and the limit screw 811 are engaged with each other.
As shown in fig. 4 and 6, the material ejecting mechanism 709 includes a driving screw 7090 and a limiting rod 7096 movably connected to the bottom end of the material storage tank 7081, a top plate 7095 sleeved outside the driving screw 7090 and the limiting rod 7096, a platform 7099 connected to the upper end of the top plate 7095, a driven gear 7091 connected to the outer wall of the driving screw 7090, a truss 7092 connected to the side wall of the material storage tank 7081, a fifth motor 7093 connected to the truss 7092, and a first driving gear 7094 connected to an output shaft of the fifth motor 7093, the first driving gear 7094 and the driven gear 7091 are engaged with each other, a moving chamber 7097 matched with the driving screw 7090 and a limiting hole 7098 matched with the limiting rod 7096 are provided in the top plate 7095, and a thread matched with the driving screw 7090 is provided on the inner wall of the moving chamber 7097.
It should be noted that, when a tested article is replaced, a new tested article is placed on the platform 7099 of the material pushing mechanism 709, then the tested article can be limited by each wrench 7089 in the adjusting mechanism 708, so as to prevent the tested article from angular deviation on the platform 7099, when the tested article is pushed into the limiting bracket 810, one end of the tested article passes through the center of the insulating part 812, the wrench 7089 can be retracted, even if the tested article topples over during the upward movement, the tested article cannot be separated from the platform 7099, when each wrench 7089 moves to a position corresponding to the limiting screw 811, the tested article still does not completely enter the limiting bracket 810, the first motor 7093 can drive the first transmission gear 7094 to rotate, the first transmission gear 7094 drives the driven gear 7091 and the transmission screw 7090 to rotate, when the transmission screw 7090 rotates, the top plate 7095 is driven to move into the limiting bracket 810, and the tested article is completely pushed into the limiting bracket 810, then the limit screw 811 is adjusted by the adjusting mechanism 708 to limit and fix the tested object, and then the tested object is separated from the limit bracket 810 and reset.
As shown in fig. 4, a fixed gear 712 is connected to a position on the outer wall of the connecting rod 706 close to the square plate 707, a sixth motor 710 is connected to the outer wall of the material storage barrel 7080, a second transmission gear 711 meshed with the fixed gear 712 is connected to an output shaft of the sixth motor 710, and the sixth motor 710 drives the second transmission gear 711 to rotate circumferentially around the fixed gear 712 and drives the material storage barrel 7080 and the square plate 707 to rotate in the same direction and at the same angle.
It should be noted that, when the adjusting square plate 707 rotates, the sixth motor 710 drives the second transmission gear 711 to rotate, and when the second transmission gear 711 rotates, the second transmission gear 711 rotates along the fixed gear 712 to perform a circumferential rotation, at this time, the sixth motor 710 moves circumferentially along with the second transmission gear 711, and because the sixth motor 710 is fixedly connected to the adjusting mechanism 708, the adjusting mechanism 708 and the square plate 707 rotate circumferentially around the connecting rod 706, the rotation angle is adjustable, and the central axis of the adjusting mechanism 708 passes through the position right below the central axis of the limiting bracket 810 during the circumferential rotation, so as to adjust the positions of the adjusting mechanisms 708 during different working processes, so as to adapt to the processes of installing a tested article and replacing the tested article.
To sum up, this EWIS electric arc test device suitable for under the low pressure environment can effectual solution atmospheric pressure environmental factor to the experimental influence of trouble electric arc, installation that can automize and dismantlement by the article to be tested, the adjustment that can be convenient when the security improves greatly is by the distance between article to be tested, fixed electrode and the movable electrode 308, and experimental precision is higher.
Moreover, if the electric devices such as the motor and the like are arranged outside the sealed cavity 1, the electric devices can be effectively prevented from being damaged by high temperature generated in the test process.
In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (8)
1. The utility model provides an EWIS electric arc test device suitable for under the low pressure environment which characterized in that: the device comprises a sealed cavity, a plurality of transparent observation windows symmetrically arranged on the side wall of the sealed cavity, a movable electrode mechanism and a fixed electrode mechanism symmetrically connected on the side wall of the sealed cavity, an air inlet valve, a vacuum pumping port, a pressure sensor and a manual valve which are connected on the side wall of the sealed cavity, a tested article limiting mechanism connected at the middle position of the top end of the sealed cavity, and a tested article replacing mechanism and a pressure release valve which are respectively arranged at two sides of the tested article limiting mechanism, wherein the top end of the sealed cavity is provided with a square groove matched with the tested article replacing mechanism;
the vacuum pumping port is used for connecting a vacuum pump set and pumping out gas in the sealed cavity;
the pressure sensor is used for monitoring the air pressure in the sealed cavity in real time;
the air inlet valve and the pressure release valve are used for adjusting air pressure in the sealed cavity;
the movable electrode mechanism and the fixed electrode mechanism are used for generating fault electric arcs in the sealed cavity;
the one end of quilt sample stop gear extends to in the sealed cavity, the one end that the mechanism was changed to the quilt sample is connected with the adjustment mechanism that a plurality of symmetry set up, be equipped with liftout mechanism in one of them adjustment mechanism, be equipped with the quilt sample in the adjustment mechanism that is equipped with liftout mechanism, the one end of quilt sample stop gear is removed to the sealed cavity in from the square trough and is installed the quilt sample to the one end of quilt sample stop gear, when changing the quilt sample, the mechanism is changed to the quilt sample and is pulled down the spacing quilt sample on the quilt sample stop gear, save in adjustment mechanism, then install new quilt sample to the one end of quilt sample stop gear through the adjustment mechanism that is equipped with liftout mechanism, the quilt sample that will pull down when the one end of quilt sample change mechanism shifts out from the square trough takes out and seals the square trough.
2. The EWIS arc test apparatus adapted for use in a low pressure environment of claim 1, wherein: the movable electrode mechanism comprises a first interface flange connected to the side wall of the sealed cavity, a first support connected to the first interface flange, a first motor connected to one end of the first support, a first lead screw connected to an output shaft of the first motor, a first sliding block connected to the first support in a sliding manner, a first movable flange connected to the first sliding block, a movable electrode fixedly connected to the middle position of the first movable flange, and a first corrugated pipe connected between the first movable flange and the first interface flange, wherein a screw hole matched with the first lead screw is formed in the first sliding block, one end of the movable electrode penetrates through the first interface flange and extends into the sealed cavity, the first corrugated pipe is sleeved outside the movable electrode, and the fixed electrode mechanism and the movable electrode mechanism are coaxially and symmetrically arranged.
3. The EWIS arc test apparatus adapted for use in a low pressure environment of claim 2, wherein: the fixed electrode mechanism comprises a fixed interface flange connected to the side wall of the sealed cavity and a fixed electrode connected to the middle position of the fixed interface flange, and one end of the fixed electrode extends into the sealed cavity and is coaxial with the movable electrode.
4. The EWIS arc test apparatus adapted for use in a low pressure environment of claim 1, wherein: the spacing mechanism of the tested object comprises a second interface flange connected at the middle position of the top end of the sealed cavity, a third bracket connected on the second interface flange, a seventh motor connected at one end of the third bracket, a fourth screw rod connected at the output shaft end of the seventh motor, a third slide block connected on the third bracket in a sliding way, a second moving flange connected on the third slide block, a connecting column fixedly connected at the middle position of the second moving flange, a second corrugated pipe connected between the second moving flange and the second interface flange, a connecting block connected at one end of the connecting column, a spacing bracket detachably connected on the connecting block, an insulating part connected at the bottom end of the spacing bracket and a plurality of spacing screw rods symmetrically connected on the spacing bracket, the third slide block is provided with a screw hole matched with the fourth screw rod, and the plurality of limiting screw rods are used for limiting the tested object in the limiting bracket.
5. The EWIS arc test apparatus of claim 4, wherein the apparatus is adapted for use in a low pressure environment, and wherein: the tested object replacing mechanism comprises a fixed plate, a second support, a second motor, a second lead screw, a second sliding block, a movable plate, a connecting rod, a plurality of supporting rods and a square plate, wherein the fixed plate is arranged above the square groove, the second support is connected to the fixed plate, the second motor is connected to one end of the second support, the second lead screw is connected to the output shaft end of the second motor, the second sliding block is connected to the second support in a sliding mode, the movable plate is connected to the second sliding block, the connecting rod is fixedly connected to the middle position of the movable plate, the supporting rods are connected between the fixed plate and the top end wall of the sealing cavity, the square plate and the square groove are matched, the fixed plate is penetrated by one end of the connecting rod, a screw hole matched with the second lead screw is formed in the second sliding block, the adjusting mechanism is symmetrically connected to the square plate, and the ejection mechanism is located in one of the adjusting mechanisms.
6. The EWIS arc test apparatus adapted for use in a low pressure environment of claim 5, wherein: adjustment mechanism is including connecting the storage bucket on the square plate, locate the storage silo in the storage bucket, a plurality of extension board of symmetric connection on the storage bucket, connect the L shape support body that the extension board lateral wall is close to upper end position department, connect the third motor on L shape support body, connect the third lead screw at third motor output shaft end, connect the removal support on the third lead screw, connect the fourth motor on removing the support, connect transmission shaft and the swing joint of fourth motor output shaft end on removing the support a plurality of driven shaft, all be connected with the sprocket on transmission shaft and a plurality of driven shaft and run through the one end of extension board and all be connected with the spanner with stop screw matched with, connect through the chain between a plurality of sprocket.
7. The EWIS arc test apparatus adapted for use in a low pressure environment of claim 6, wherein: the liftout mechanism includes that swing joint establishes at the drive screw and the gag lever post of storage tank bottom, the outside roof of drive screw and gag lever post, connects at the platform of roof upper end, connects driven gear on the drive screw outer wall, connects truss on the storage tank lateral wall, connects the fifth motor on the truss and connects the first drive gear of output shaft at the fifth motor, first drive gear and driven gear mesh mutually, be equipped with in the roof with drive screw matched with remove the cavity and with gag lever post matched with spacing hole, be equipped with on the removal cavity inner wall with drive screw matched with screw thread.
8. The EWIS arc test apparatus adapted for use in a low pressure environment of claim 6, wherein: the outer wall of the connecting rod is connected with a fixed gear at a position close to the square plate, the outer wall of the material storage barrel is connected with a sixth motor, an output shaft of the sixth motor is connected with a second transmission gear meshed with the fixed gear, and the sixth motor drives the second transmission gear to rotate circumferentially around the fixed gear and drives the material storage barrel and the square plate to rotate in the same direction and at the same angle.
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| CN202210274556.4A CN114355131B (en) | 2022-03-21 | 2022-03-21 | EWIS electric arc test device suitable for low atmospheric pressure environment |
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| CN202210274556.4A CN114355131B (en) | 2022-03-21 | 2022-03-21 | EWIS electric arc test device suitable for low atmospheric pressure environment |
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| CN114355131B CN114355131B (en) | 2022-05-17 |
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