A kind of oil-filled transformer Buchholz relay protective cover
Oil-filled transformer field is the utility model is related to, especially a kind of oil-filled transformer Buchholz relay protection
Buchholz relay (i.e. gas relay), it is a kind of protection device of oil-filled transformer, installed in transformer
Between conservator and fuel tank, required according to mounting process, the transformer for installing Buchholz relay has 1%-1.5%'s when mounted
The gradient, in power transformer interior fault oil decomposition produce and gas or cause oil flow surge, act the contact of gas relay, connect
The logical control loop specified, and signal alarm (light gas) is sent in time or starting protection element cuts off transformer (weight watt automatically
Out of doors, its Buchholz relay needs to take rain-proof measure the installation of most of oil-filled transformers, at present, gas after
Using sealing ring is added between electrical equipment body and rain-proof shell, using bolt connection, sealing ring easily splits through wind and weather
Line, its rainproof effect are bad, it is necessary to regularly replace.Cause Buchholz relay internal water accumulation after sealing ring failure, Buchholz relay touches
Point malfunction, sends alarm signal, when serious, grave gas action, cause to cut off transformer station high-voltage side bus, influences power supply reliability.
In order to solve the unshielded cover of Buchholz relay, some transformers are bundled on pipeline using U-shaped metal cap, strong wind day
Gas, which there may be, to be stirred, and is discharged between charging equipment, and its colligation is insecure, dismounting is inconvenient, potential safety hazard be present.
Utility model content
The purpose of this utility model is to provide a kind of oil-filled transformer Buchholz relay protective cover, mainly solved existing
Unshielded cover person rainproof effect present in technology is bad, using the installation of metal cap is not firm, dismounting is inconvenient, it is hidden safety to be present
The problems such as suffering from.
To achieve these goals, the technical solution adopted in the utility model is as follows：
A kind of oil-filled transformer Buchholz relay protective cover, includes the back box of built-in Buchholz relay, and is fastened on
Protective cover in back box, wherein, back box two side edge, which is respectively provided with, is fixed on the end hoop that Buchholz relay enters outlet line, the end
Hoop is bound round including the lower end being connected with back box, and the end hoop lid of connection is bound round by hinge and lower end, before and after protective cover and back box
The observation panel of U-shaped is set；The back box sidepiece is provided with the cable threading hole for being used for gathering Buchholz relay signal；The back box bottom
Portion is provided for discharging the osculum of ponding.
Further, protective cover both sides lower edge and back box both sides top edge are respectively provided with for running through Buchholz relay oil pipe
The semicircle orifice on road.
Compared with prior art, the utility model has the advantages that：
Buchholz relay is placed in protective cover back box by the utility model, and the end by being distributed in back box both sides, which is bound round, to be fixed on
On oil pipe line, protective cover is fastened in back box, is fixed using bolt, in repair and maintenance, only need to remove bolt,
The back box and protective cover of the protective cover are respectively provided with Buchholz relay viewing glass mouth, facilitate gas in walkaround inspection Buchholz relay
Situation, wherein, osculum is set in back box bottom, the ponding in back box can be drained, avoid ponding from causing false positive signal.The reality
Have the advantages that simple in construction, easy for installation, connection is reliable, rainproof effect is good with new, tool is utilized in oil-filled transformer
There are very high practical value and promotional value.
Brief description of the drawings
Fig. 1 is protective cover top view.
Fig. 2 is the structural representation of back box.
Fig. 3 is the structural representation of protective cover.
In above-mentioned accompanying drawing, component names are as follows corresponding to reference：
1- back box, 2- protective covers, 3- ends hoop, 4- lower ends hoop, 5- ends hoop lid, 6- observation panels, 7- cable threading holes, 8- drainings
Hole, 9- semicircle orifices.
The utility model is described in further detail with reference to the accompanying drawings and examples, and embodiment of the present utility model includes
But it is not limited to the following example.
As shown in Figure 1 to Figure 3, a kind of oil-filled transformer Buchholz relay protective cover includes the bottom of built-in Buchholz relay
Box 1, and the protective cover 2 being fastened in back box 1, the two side edge of back box 1 be respectively provided be fixed on Buchholz relay enter it is fuel-displaced
The end hoop 3 of pipeline, wherein, end hoop 3 includes the lower end hoop 4 being connected with back box 1, and the end being connected by hinge with lower end hoop 4
Lid 5 is bound round, in order to ensure the weather seal of end hoop 3, sealing ring is equipped with the semicircle of lower end hoop 4 and end hoop lid 5, may also function as
Protective cover damping.In order to facilitate walkaround inspection, the observation panel 6 of U-shaped is respectively provided with before and after protective cover 2 and back box 1.
The sidepiece of back box 1 of the protective cover is provided with the cable threading hole 7 for being used for gathering Buchholz relay signal, and bottom, which is set, to be used
In the osculum 8 of discharge ponding, according to oil-filled transformer mounting process, transformer installs the gradient that 1%-1.5% be present, should
The back box of the protective cover is arranged close to transformer side close to the side of osculum 8.
The both sides lower edge of protective cover 2 and the both sides top edge of back box 1 of the protective cover are respectively provided with for running through Buchholz relay
The semicircle orifice 9 of oil pipe line.
Above-described embodiment is only preferred embodiment of the present utility model, not to the limitation of scope of protection of the utility model,
In every case design principle of the present utility model, and the change for carrying out non-creativeness work on this basis and making are used, all should
Belong within the scope of protection of the utility model.