CN201392707Y

CN201392707Y - Check valve

Info

Publication number: CN201392707Y
Application number: CN200920003654U
Authority: CN
Inventors: 李习芹; 王士杰; 王维征; 吴文林; 李素雅; 周国顺
Original assignee: Baoding Tada Cooling Equipment Co Ltd; Baoding Tianwei Group Co Ltd
Current assignee: Baoding Tada Cooling Equipment Co Ltd; Baoding Tianwei Group Co Ltd
Priority date: 2009-01-19
Filing date: 2009-01-19
Publication date: 2010-01-27
Anticipated expiration: 2019-01-19

Abstract

The utility model discloses a check valve, which comprises a box body, a valve plate, a valve shaft and a valve shaft sleeve. The two ends of the box body are provided with a flange. Two opposite side walls at the upper end of the box body are fixedly provided with the limiting seat of the valve shaft. The valve shaft is arranged in the limiting seat horizontally and the valve plate is fixed on the valve shaft sleeve. The valve shaft sleeve is sleeved on the valve shaft. The other end of the box body at the lower end of the limiting seat of the valve shaft is provided with a limiting device which is horizontally fixed or horizontally and detachably fixed on the side wall of the box body. The utility model keeps the valve plate open under the action of the gravity and does not depend on any support, thereby the phenomenon of losing efficacy because of the damage of the support can not occurred and the circulation and the disconnection of the oil stream have high reliability. The utility model has the advantages of stable performance, simple structure, convenient maintenance and long service life.

Description

Non-return valve

One, technical field

The utility model belongs to the parts of transformer: oil stream non-return valve.

Two, background technology

For guaranteeing that transformer when a table oil pump is standby, the oil circuit short circuit does not take place, and increased non-return valve, this non-return valve is the open type non-return valve.Non-return valve is installed between transformer radiator collecting pipe and the transformer oil pump, make transformer oil only make folk prescription to flowing, the flow direction of stipulating when the flow direction and the non-return valve of transformer oil is opposite, and when reaching certain flow, valve plate is closed, and stops the transformer oil reverse flow.Existing non-return valve majority is a spring, valve plate rotatably is fixed on the cabinet wall, is supported by the spring that is fixed on the cabinet wall, because the poor reliability of spring, the long-time valve plate that supports, fatiguability, aging, even follow the string, in case spring damages, valve plate is closed, and the radiator of transformer can no longer dispel the heat because of lacking transformer oil, and transformer burns out because of temperature rise is too high.So the reliability of non-return valve must be got well, the non-return valve that has is electronic, and propping up of valve plate is supported by driven by motor, in case have a power failure, consequence is hardly imaginable, so feasibility is not high yet.

Three, summary of the invention

The utility model solves the above-mentioned problems in the prior art exactly, and a kind of reliability height is provided, stable performance, the non-return valve of long service life.

For addressing the above problem, technical solution of the present utility model is: a kind of non-return valve, and it comprises casing, valve plate, valve shaft and valve shaft cover; The two ends of casing are flange, on two opposite side walls of casing upper end one end, be fixed with the limit base of valve shaft, the valve shaft level places in the limit base, when the position of valve shaft should make valve plate open, naturally sagging, when valve plate is closed, just in time cover flange port, valve plate is fixed on valve shaft and puts, and the valve shaft cover is enclosed within on the valve shaft; The casing other end in valve shaft limit base lower end has stopping means, and stopping means is horizontally fixed on or level removably is fixed on the sidewall of casing.

A kind of preferred version wherein is equipped with rubber blanket and clamp at the end that described valve plate deviates from valve shaft.

A kind of preferred version wherein is equipped with oily flow path direction indication nameplate in described casing upper end.

Because the utility model has adopted such scheme, during use, be installed in pipeline between radiator and the oil pump with the center line of flange from the horizontal by 55 ° of angles on, at this moment, valve plate can rotate along valve shaft, sagging naturally by gravity, during the transformer oil forward flow, valve plate is sagging naturally, during the transformer oil reverse flow, valve plate can move under the effect of oil, covers flange port, makes the oil can not reverse flow.The utility model makes valve plate stay open state by gravity, does not rely on any support, and it no longer lost efficacy because of the infringement of supporter, and it makes the transformer oil circulation and blocks the reliability height, and stable performance is simple in structure, easy to maintenance, long service life.

Four, description of drawings

Below in conjunction with accompanying drawing the utility model is described further:

Fig. 1 looks cut-away view for master of the present utility model;

Fig. 2 looks cut-away view for a left side of the present utility model;

Fig. 3 is a vertical view of the present utility model;

Fig. 4 is the AA cutaway view of Fig. 1;

A kind of mounting structure schematic diagram when Fig. 5 uses for it;

Similar alternative arrangements schematic diagram when Fig. 6 uses for it.

Five, embodiment

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, present embodiment comprises casing 6, nameplate 5, valve plate 2, valve shaft 4 and valve shaft cover 3.The two ends of casing 6 are flange 1, and casing 6 upper ends are equipped with oily flow path direction indication nameplate 5.On two opposite side walls of casing 6 upper ends one end, be fixed with the limit base 12 of valve shaft 4, valve shaft 4 levels place in the limit base 12, when the position of valve shaft 4 should make valve plate 2 open, naturally sagging, when valve plate 2 is closed, just in time cover flange port 11, valve plate 2 is fixed on the valve shaft cover 3, and valve shaft cover 3 is enclosed within on the valve shaft 4.Casing 6 other ends in valve shaft limit base 12 lower ends have stopping means: limit shaft 8, limit shaft 8 levels place in the limit base of the limit shaft on the sidewall of casing 6.The end that valve plate 2 deviates from valve shaft 4 is equipped with rubber blanket 9 and clamp 10.During use, as shown in Figure 5 and Figure 6, be installed in pipeline between radiator and the oil pump with the center line of flange 1 from the horizontal by 55 ° of angles on, the direction of arrow on the nameplate 5 is to point to the oil pump side by radiator collecting pipe side.

Claims

1, a kind of non-return valve, it comprises casing (6) and valve plate (2), it is characterized in that: further comprising valve shaft (4) and valve shaft cover (3); The two ends of casing (6) are flange (1), on two opposite side walls of casing (6) upper end one end, be fixed with the limit base (12) of valve shaft (4), valve shaft (4) level places in the limit base (12), the position of valve shaft (4) should make valve plate (2) when opening, naturally sagging, valve plate (2) just in time covers flange port (11) when closing, valve plate (2) is fixed on the valve shaft cover (3), and valve shaft cover (3) is enclosed within on the valve shaft (4); The casing other end in valve shaft limit base (12) lower end has stopping means, and stopping means is horizontally fixed on or level removably is fixed on the sidewall of casing (6).

2, non-return valve according to claim 1 is characterized in that: the end that described valve plate (2) deviates from valve shaft (4) is equipped with rubber blanket (9) and clamp (10).

3, according to claim 1 or 2 described non-return valves, it is characterized in that: described casing (6) upper end is equipped with oily flow path direction indication nameplate (5).