CN2891417Y

CN2891417Y - Reverse V-type box ventilation device in transformer substation

Info

Publication number: CN2891417Y
Application number: CN 200620039883
Authority: CN
Inventors: 胡玉龙; 俞叶青
Original assignee: SHANGHAI DAHUA ELECTRONIC EQUIPMENT CO Ltd
Current assignee: SHANGHAI DAHUA ELECTRONIC EQUIPMENT CO Ltd
Priority date: 2006-03-02
Filing date: 2006-03-02
Publication date: 2007-04-18
Anticipated expiration: 2016-03-02

Abstract

The utility model relates to a ventilator for box type transformer substations. An inverted V-type ventilator for the box type transformer substation comprises a wind outlet positioned on the upper part of the box transformer substation body and a wind inlet positioned on the lower part of the box transformer substation body. The utility model is characterized in that the wind inlet is an inverted V-type wind inlet grid and is positioned on the lower part of the box transformer substation door, and the wind outlet is positioned on the top side of the four sides on the upper part of the box body. The utility model has big buoyancy force and small resistance, and can achieve high defense grade. The utility model also has the advantages of high and effective ventilation efficiency and simple structure. In addition, the utility model can guarantee the safe and reliable working of the box transformer substation and extend the service life of the transformer.

Description

Box-type substation inverted V-shape ventilation unit

(1) technical field

The utility model relates to the box-type substation ventilation unit.

(2) background technology

Loss major part in the box-type substation (becoming hereinafter to be referred as case) during transformer work is distributed with form of heat, causes transformer station in temperature too high, seriously jeopardizes the security of operation of case change, and transformer shortening in useful life, therefore, ventilation unit generally is equipped with in the case change, in order to reduce the temperature inside the box.Ventilation unit can be divided into forced ventilation and natural draft, and forced ventilation is inharmonious because of its turnover wind, the inner air collision of circling round, the contradiction of air outlet and degree of protection is difficult to be in harmonious proportion, add that forced ventilation device itself is exactly a thermal source, therefore, the ventilation unit that case becomes mostly is natural draft.

The flexible wind apparatus of case generally is to open an air outlet above case becomes casing, and an air inlet is left in the casing below, and hot-air is discharged by air outlet, and cold air is entered by air inlet.Say for concrete case change, should consider that ventilating system should have bigger air buoyancy lift, also to consider rainproof and degree of protection, simultaneously, under the prerequisite that guarantees ventilation quantity, make the cold air of air inlet enter into case as far as possible and become inner, avoid the low and inboard temperature of temperature that occurs near inlet and outlet casing limit higher.At present, the flexible wind system of case adopts venetian blind type more, and its air inlet as shown in Figure 1.Its shortcoming might be direct splashing on the transformer for the rainwater that is splashed into from air inlet, degree of protection is difficult to reach higher level, the flow direction from cold air, because the inertia of wind speed, cold air can not arrive bottom half, the air buoyancy lift is little, and it is inhomogeneous that case becomes the inner air flow, and drafting efficiency is low.The labyrinth type of employing aeration structure is also arranged, and its air inlet as shown in Figure 2.The labyrinth type air intake lancet has had improvement to the venetian blind type air inlet, but air inlet has the collision of air, circuitous, Yo-yo phenomenon existence, and air drag is bigger, and from the flow direction of cold air, because last leeward hole connects, cold air is difficult to arrive bottom half, buoyancy lift a little less than.

(3) summary of the invention

The purpose of this utility model is to provide a kind of box-type substation inverted V-shape ventilation unit, and this ventilation unit drafting efficiency height can be prevented rainwater, degree of protection height, and is simple in structure.

The utility model is achieved in that a kind of box-type substation inverted V-shape ventilation unit, comprises that being positioned at case becomes the air outlet of casing top and be positioned at the air inlet that case becomes the casing below, is characterized in that air inlet is an inverted V-shape air intake grid.

Above-mentioned box-type substation inverted V-shape ventilation unit, described air inlet place the box type substation door below, and air outlet is opened the edge, four edges portion top on casing top.

The utility model is to adopt inverted V-shape air intake grid lattice structure at air inlet, its air inlet air drag is less, wind speed and range that cold air enters are bigger, cold air is under the effect of inertia of wind speed, the inferoanterior that becomes to case flows, cold air can effectively enter into case and become bottom and inboard, and air outlet places case to become the top, therefore, the buoyancy lift of air is bigger, enters into case and becomes inboard cold air, has guaranteed the uniformity of the flexible wind of case, avoid case to become the too high phenomenon of common ventilating system local temperature, had high effectively drafting efficiency.

The beneficial effects of the utility model are: have bigger buoyancy lift and less resistance, can reach the degree of protection of higher level, have high effectively drafting efficiency, it is safe and reliable that guard box becomes, and prolongs the useful life of transformer, and simple in structure.

(4) description of drawings

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Fig. 1 is a venetian blind type for air inlet.

Fig. 2 is a labyrinth type for air inlet.

Fig. 3 is an inverted V-shape for air inlet of the present utility model;

Fig. 4 is the air-inlet window structural representation of box-type substation inverted V-shape ventilation unit;

Fig. 5 is the end view of Fig. 4

(5) embodiment

Referring to Fig. 4, Fig. 5, a kind of box-type substation inverted V-shape ventilation unit comprises that being positioned at case becomes the air outlet of casing top and be positioned at the air inlet that case becomes the casing below, and air outlet is opened the edge, four edges portion top on casing top, and air inlet places the box type substation door below.Become inverted V-shape air intake grid 1 behind metal foil bending 90 degree, stiffener 2 is equipped with at air intake grid 1 middle part, and air intake grid 1 is installed in the window frame 3 and is fixed on self-clinching stud on the air inlet of box type substation door below.Adopt the metal box of inverted V-shape ventilation unit to become, the specification that case becomes is 500kVA 10kV/0.4kV, and its shell rank is 10 grades, and temperature rise is less than 10 degree; And adopt venetian blind type ventilation unit, its temperature rise is 10～30 degree.

The utility model box-type substation inverted V-shape ventilation unit has bigger buoyancy lift and less resistance, can reach the degree of protection of higher level, have high effectively drafting efficiency, it is safe and reliable that guard box becomes, prolong the useful life of transformer, and simple in structure.

Claims

1. a box-type substation inverted V-shape ventilation unit comprises that being positioned at case becomes the air outlet of casing top and be positioned at the air inlet that case becomes the casing below, is characterized in that air inlet is an inverted V-shape air intake grid.

2. box-type substation inverted V-shape ventilation unit according to claim 1 is characterized in that air inlet places the box type substation door below, and air outlet is opened the edge, four edges portion top on casing top.