CN204257928U - The fastening clamp of a kind of plug-in unit for photovoltaic plant inverter - Google Patents

Abstract

The utility model discloses the fastening clamp of a kind of plug-in unit for photovoltaic plant inverter, be symmetricly set on the upper and lower surface of socket support, the fastening clamp of each plug-in unit comprise compressing member, with perforation two fixtures, spring, long screws and clamp part, perforation is offered at the two ends of described compressing member, each described long screw correspondence runs through the perforation on the perforation of compressing member one end and a fixture, simultaneously described spring is connected between described compressing member and fixture, described in clamp part correspondence and be arranged on the another side of fixture and whole clamp is installed on socket support; The utility model " can divide ", in the vibrative situation of " conjunction " action by contactor in inverter; play the effect that plug-in unit is tightened up in damping; be unlikely to allow between the plug of plug-in unit and socket and occur loosening; it is made to combine closely all the time; the reduction of the plug-in unit looseness fault frequency of occurrences even disappears; making plug-in unit no longer produce metrical error, inverter in operation will being caused to shut down because receiving inaccurate parameter value.

Description

The fastening clamp of a kind of plug-in unit for photovoltaic plant inverter

Technical field

The utility model relates to photovoltaic art, is specifically related to a kind of inverter of photovoltaic plant.

Background technology

In various industrial application, often relate to cable (as cable, optical cable, wire), connection fastening problems between sheet metal and cable, generally be applied to inactive state, check that repairing or pull out the not high field of movement requirement often adopts winding or metal cartridge clip (i.e. copper lug binding post) mutually to carry out fastening, also has the fastening form adopting screw to add metal end sub-aperture.

Adopt the method be mutually wound around can adapt to the fastening requirement of common cable, its shortcoming is that manufacture craft is too simple, and in large load range, cable connection joint portion bears thermal stress and electromagnetic force effect is poor, easily loosens.And after adopting metal cartridge clip can only meet the disposable installation in cable junction, connect fastening requirement without the cable of maintenance item more herein.The fastening form that screw adds metal end sub-aperture is reliably fastening, but its cable has to pass through metal end sub-aperture, the facility space taken needed for must being equipped with separately, increases cost, complex structure.

Connector in current power equipment has special in fastening device---plug-in unit, it is (similar to socket used, plug principle in life that this fastener mainly comprises plug and socket two parts, property use difference is comparatively large, and what introduce is electric power tailored version herein).Plug body position is an insulation crust, and its inner one end access cable, exposes microscler copper sheet or the copper post (also having needle-like) of hard rigidity in outside one end; Socket main body position is also an insulation crust, and its inner one end access cable, shell has the jack exposed, and is to provide the combination of circular arc type copper sheet or the grooved copper metal (also having tubular) of the hard elastic of insertion in jack; Plug blades is identical with the number of share of stock of wire in cable with the quantity of socket aperture.The fastening effect of plug-in unit be depend on the contact of plug and socket copper sheet after elastic force, snap-in force, pressure, frictional force etc. each other, apply these physical mechanics principles, certain fastening effect can be reached, auxiliary fastening effect is then utilize inlaying meshing, reverse cut-off, withhold resilience between plug and socket in profile, and the adjustment primary screw etc. be equipped with between the two realizes strengthening.

But there is a common phenomenon at photovoltaic plant, when light is normal, inverter cannot start grid-connected when not there are quality problems, and electricity can not be carried to electrical network.Reason concrete analysis is as follows: when inverter startup or when shutting down; large-scale A.C. contactor adhesive, will produce larger power when being separated, these two power are respectively: the elastic force produced during contactor inner spring release deformation after the magnetic force produced during the magnetic field suction magnetic conduction armature that contactor coil energising excitation is formed and coil blackout loss of excitation.Because object is all very large, quality is also very large, so inertia is very large, these two kinds of power all can bring large impact, moreover spring also has the process that elastic potential energy and speed kinetic energy transforms mutually after first compression or release, reciprocal stretching motion back and forth, namely mechanical oscillation is produced, and die-away time is long, therefore whole inverter cabinet all can experience very large vibration, and its internal plug is often during this time quaked loose.The fault that inverter much cannot start in fact is because plug-in unit does not contact mostly, and contact resistance increases, and the metrical error of generation causes, and sometimes this error also directly causes inverter in operation to be shut down.

Current photovoltaic plant inverter internal needs the fastener that better reliability, higher fastening strength, structure are simple, cheap, be easier to realize the fastening standardization and seriation of plug-in unit; and the technological means of existing appointed condition and enforcement is difficult to meet these developing technical requirements above-mentioned completely; in order to make each inverter can be grid-connected smoothly; shut down less at ordinary times; steady generating; do not lose economic benefit, therefore addressing these problems is the task of top priority.

Utility model content

Utility model object: the purpose of this utility model is for the deficiencies in the prior art, provides the plug-in unit for photovoltaic plant inverter that a kind of structure is simple, reliability is high fastening clamp.

Technical scheme: the fastening clamp of a kind of plug-in unit for photovoltaic plant inverter described in the utility model, be symmetricly set on the upper and lower surface of socket support, the fastening clamp of each plug-in unit comprises compressing member, with two fixtures of perforation, spring, long screw and clamp part, arch upward in the middle part of described compressing member, perforation is offered at two ends, each described long screw correspondence runs through the perforation on the perforation of compressing member one end and a fixture, described spring is connected between described compressing member and fixture simultaneously, the described part correspondence that clamps is arranged on the another side of fixture and is installed on socket support by whole clamp.The utility model utilizes compressing member to apply pressure and makes elastic fastener and connector form firm contact each other to reach fastening effect, solve the fastening problems between the plug of inverter internal plug-in unit and receptacle connector.

Further, arch upward in the middle part of described compressing member, therefore the front of compressing member and plug-in unit and two side close contacts, three intimate surface are namely had to fit together, compressing member is also included the inside at it while plug-in unit is compressed, and makes fixation more abundant, sound construction.

Further, the thickness of described compressing member is 2mm, ensures mechanical strength and elasticity dynamics.

Further, described spring is the spiral silicomanganese wire spring of long cylinder, has the features such as good springiness, dynamics be strong, anti-oxidant, corrosion-resistant, the reaction force damping of spring can be utilized to continue the effect of tightening up occurring playing under Vibration Condition.

Further, the thickness being shorter in length than claimed plug-in unit of described spring; Reason is to make spring be in the length normally slightly stretched at ordinary times, make plug-in unit contact Contact fastening, when there is vibration or heating, spring is forced to, in the process continuing to stretch, produce larger elastic pulling force and strictly controlled by plug-in unit to be back to tightening state.

Further, described long screw is the medium carbon steel screw of oval column type, have that mechanical strength is high, hard good rigidly, sturdy and durable, maintenance time the features such as screw rod can not rupture, silk mouth is not fragile.

Further, described long screw 2cm longer than the thickness of claimed plug-in unit, being convenient to nut can screw; after long screw connection fastens compressing member and fixture; can also the tensile elongation of regulating spring, change its fastening dynamics, fastening effect required under allowing spring reach various condition.

Beneficial effect: 1, the utility model " can divide " by contactor in inverter, in the vibrative situation of " conjunction " action, play the effect that plug-in unit is tightened up in damping, be unlikely to allow between the plug of plug-in unit and socket and occur loosening, it is made to combine closely all the time, the reduction of the plug-in unit looseness fault frequency of occurrences even disappears, this favourable result can make to play " protecting control, measure and monitor, operation adjustment, communication transfer " plug-in unit of function no longer produces metrical error, collection can not be made because of these errors, departing from appears in the parameter value of feedback, mistake, inverter in operation will be caused to shut down because receiving inaccurate parameter value, therefore, reach and normal continuous can be kept to generate electricity under normal lighting conditions, effectively make use of generating dutation, the phenomenon not having plug-in unit loosening causes inverter to shut down, waste generating dutation or impairment energy output, 2, whole folder there is strong compression, tighten up, fix, damping, the effect such as stable, and the characteristic such as rigidity, elasticity, toughness of part material that folder is selected, all can make the contact between contact be improved than originally not using during folder, 3, the plug in plug-in unit and between socket the raising of the contact of contact directly can ensure that the contact area between contact increases too, metal material is due to the cause of its hard rigidity, two metal objects contacted with each other fully will contact and must rely on external pressure, so pressure large contact surface is long-pending just large, due to heat conducting condition, contact area is large, and area of dissipation is also large, and namely radiating effect is better, 4, according to the defined formula of resistance: R=ρ L/S, the resistivity that namely resistance equals material is multiplied by length of material and amasss divided by material section, is inversely proportional to its resistance according to the known material section of formula is long-pending, due to the increase of contact area, so contact resistance reduces, 5, spring expand with heat and contract with cold feature can when temperature raises length, contraction in length when temperature reduces, again according to the Hooke's law describing spring force size: F=kL, namely spring produce the size of elastic force equal generation deformation length when the elastic coefficient is multiplied by it because of drawing high or compressing number, so when temperature raises or reduce, spring changes due to length, different when elastic force does not also become than original temperature, 6, whole folder employs various metal material respectively, the shape of part is respectively rectangle, carefully cylindrical, spirality, rectangle combination, because the thermal conductivity of metal, its surface area of various shape are large, all be beneficial to heat radiation, so the stable of whole device can be ensured, and all there is good mechanical property, meet the mechanics of materials, the design of engineering mechanics and requirement, no matter be aluminium or steel, rectangle or circle has sufficient mechanical strength, can resistance to compression tension antidetonation, 7, the requirement of fastening effect while independent one or the single multiple plug-in unit of inverter in photovoltaic plant can be met, adapt to the plug-in unit fastening requirements that caloric value is large, temperature is high, be applicable to various types of plug-in unit, there is same fastening effect, but also conveniently can realize the fastener standardization and seriation of connection device, 8, can simplify the complexity of major project (inverter cabinet) structure, fastener structural body is easy to dismounting, facilitates the working service of fastened object to repair.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the structural representation of compressing member;

Fig. 3 is the structural representation clamping part.

Embodiment

Below technical solutions of the utility model are described in detail, but protection range of the present utility model is not limited to described embodiment.

embodiment: the fastening clamp of a kind of plug-in unit for photovoltaic plant inverter, as shown in Figure 1, be symmetricly set on the upper and lower surface of socket support, the fastening clamp of each plug-in unit comprises compressing member 1, with two fixtures 4 of perforation, four springs 2, two long screws 3 and two clamp part 5, compressing member 1 as shown in Figure 2, arch upward in middle part, in " several " font, middle arcuate part is the rectangle of a section longer, two foot section at two ends are divided into the rectangle of two pieces shorter, the vertical component that arch is connected with leg is the medium rectangle of two panels, the length, width and height of the plug-in unit that the concrete size of compressing member 1 is protected according to it and quantity determine, its thickness is 2mm.Meanwhile, compressing member 1 is made up of light and thin aluminium, and compressing member 1 covers the outer surface being laminated on plug-in unit plug, and compressing member 1 metal aluminium contacts with the plastic cement material of plug-in unit, from the mechanics of materials, has stronger frictional force and elastic force between them.Two leg parts of compressing member 1 offer three perforation separately, middle bore dia is larger, there is provided run through install long screw 3 used, the bore dia on both sides is less, spring 2 hook is provided to connect bolt tightly used, each long screw 3 correspondence runs through the perforation on the perforation of compressing member 1 one end and a fixture 4, and meanwhile, one end of compressing member 1 has two spring 2 correspondences to be connected between itself and fixture 4.Concrete, spring 2 is the spiral silicomanganese wire spring 2 of long cylinder, and length is slightly shorter than the thickness of the plug-in unit that it is protected; Long screw 3 is the medium carbon steel screw of oval column type, and its length is than long 2 centimetres of the thickness of claimed plug-in unit, and the leeway stayed is convenient to nut and can be screwed; Fixture 4 is the cuboid of stainless steel, and the hole on fixture 4 runs through spring 2 and long screw 3 successively, is supported on socket support, both sides each, be spring 2 and long screw 3 other end lay point, fixing point.The another side correspondence of each fixture 4 install one as shown in Figure 3 clamp part 5, be screwed, clamp part 5 and be installed on socket support by whole clamp, fastening folder is attached on the inner backboard of inverter cabinet strong impetus.Concrete, clamp part 5 for alloy-steel sheet, shape is " several " font, be similar to the shape of channel-section steel, its arcuate part offers the screw hole corresponding with fixture and compressing member, and clamping part 5 and be attached to fixture 4 behind nut and be with tightly, is the plane that fixture 4 depends on, clamp part 5 to be connected with fixture 4 with support respectively, fixture really can be played be fixed and clamped the effect of part 1 and even whole fastening folder.

Compressing member 1 is withheld up and down in jack housing, plug and socket Contact pressure is kept to make it to combine closely, fixture 4 makes fastener be attached on the inner backboard of inverter cabinet strong impetus, spring 2 hook is connected between compressing member 1 end and fixture 4, occurring that Vibration Condition utilizes the reaction force damping of spring 2 to continue to tighten up, it is fastening with the connection of fixture 4 that compressing member 1 strengthened by long screw 3, and can regulating spring 2, clamp part 5 and be connected with fixture 4 with support respectively, be whole device stability fundamental.

As mentioned above, although represented with reference to specific preferred embodiment and described the utility model, it shall not be construed as the restriction to the utility model self.Under the spirit and scope prerequisite of the present utility model not departing from claims definition, various change can be made in the form and details to it.

Claims (7)

1. the fastening clamp of the plug-in unit for photovoltaic plant inverter, be symmetricly set on the upper and lower surface of socket support, it is characterized in that: the fastening clamp of each plug-in unit comprise compressing member, with perforation two fixtures, spring, long screws and clamp part, perforation is offered at the two ends of described compressing member, each described long screw correspondence runs through the perforation on the perforation of compressing member one end and a fixture, simultaneously described spring is connected between described compressing member and fixture, described in clamp part correspondence and be arranged on the another side of fixture and whole clamp is installed on socket support.

2. the fastening clamp of the plug-in unit for photovoltaic plant inverter according to claim 1, is characterized in that: arch upward in the middle part of described compressing member.

3. the fastening clamp of the plug-in unit for photovoltaic plant inverter according to claim 1 and 2, is characterized in that: the thickness of described compressing member is 2mm.

4. the fastening clamp of the plug-in unit for photovoltaic plant inverter according to claim 1, is characterized in that: described spring is the spiral silicomanganese wire spring of long cylinder.

5. the fastening clamp of the plug-in unit for photovoltaic plant inverter according to claim 1 or 4, is characterized in that: the thickness being shorter in length than claimed plug-in unit of described spring.

6. the fastening clamp of the plug-in unit for photovoltaic plant inverter according to claim 1, is characterized in that: described long screw is the medium carbon steel screw of oval column type.

7. the fastening clamp of the plug-in unit for photovoltaic plant inverter according to claim 1 or 6, is characterized in that: described long screw 2cm longer than the thickness of claimed plug-in unit.