CN101783232B

CN101783232B - Check valve

Info

Publication number: CN101783232B
Application number: CN 200910000844
Authority: CN
Inventors: 郑泉; 李习芹; 王士杰; 王维征; 吴文林; 李素雅
Original assignee: Baoding Tianwei Group Co Ltd
Current assignee: Baoding Tianwei Group Co Ltd
Priority date: 2009-01-19
Filing date: 2009-01-19
Publication date: 2013-01-16
Anticipated expiration: 2029-01-19
Also published as: CN101783232A

Abstract

The invention discloses a check valve, which comprises a box body, a valve plate, a valve shaft and a valve shaft sleeve. Both ends of the box body are provided with flanges; two opposite side walls at one end of the upper end of the box body are fixed with limit seats of the valve shaft; the valve shaft is horizontally arranged in the limit seats; 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 ends of the limit seats of the valve shaft is provided with a limit device; and the limit device is horizontally fixed or horizontally detachably fixed on the side wall of the valve body. The check valve makes the valve plate maintain an open state by means of the gravity, is independent of any support, does not lose effectiveness due to damage of the support and has the advantages of high reliability of circulation and truncation of oil flow, stable performance, simple structure, convenient maintenance and long service life.

Description

Non-return valve

One, technical field

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

Two, background technology

For guaranteeing that transformer when an oil pump is for subsequent use, the oil circuit short circuit does not occur, 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 do one way flow, when the flow direction of the flow direction of transformer oil and non-return valve regulation opposite, and when reaching certain flow, valve plate is closed, and stops the transformer oil reverse flow.Existing non-return valve majority is spring, valve plate rotatably is fixed on the cabinet wall, by the spring supporting 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 lacking transformer oil, and transformer burns out because temperature rise is too high.So the reliability of non-return valve must be got well, some non-return valves are 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 present invention solves the above-mentioned problems in the prior art exactly, provides a kind of reliability high, stable performance, the non-return valve of long service life.

For addressing the above problem, technical solution of the present invention 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, be fixed with the limit base of valve shaft at two opposite side walls of casing upper end one end, the valve shaft level places in the limit base, when the position of valve shaft should make valve plate open, naturally droop, 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; At the casing other end limited location device of valve shaft limit base lower end, stopping means is horizontally fixed on or level removably is fixed on the sidewall of casing; During use, on being installed in pipeline between radiator and the oil pump with the center line of flange from the horizontal by 55 ° of angles, valve plate can rotate along valve shaft, naturally droop by gravity, during the transformer oil forward flow, valve plate naturally droops, 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.

A kind of preferred version is characterized in that: an end that deviates from valve shaft at described valve plate is equipped with rubber blanket and clamp.

A kind of preferred version is characterized in that: oily flow path direction indication nameplate is installed in described casing upper end.

The present invention 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 transformer oil circulation and block reliability high, and stable performance is simple in structure, easy to maintenance, long service life.

Four, description of drawings

Below in conjunction with accompanying drawing the present invention is described further:

Fig. 1 is that master of the present invention looks cut-away view;

Fig. 2 is that cut-away view is looked on a left side of the present invention;

Fig. 3 is vertical view of the present invention;

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

Mounting structure schematic diagram when Fig. 5 uses for it.

Five, embodiment

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the 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.Be fixed with the limit base 12 of valve shaft 4 at two opposite side walls of casing 6 upper ends one end, valve shaft 4 levels place in the limit base 12, when the position of valve shaft 4 should make valve plate 2 open, naturally droop, 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 end limited location devices in valve shaft limit base 12 lower ends: 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, 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. 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), be fixed with the limit base (12) of valve shaft (4) at two opposite side walls of casing (6) upper end one end, valve shaft (4) level places in the limit base (12), the position of valve shaft (4) should make valve plate (2) when opening, naturally droop, valve plate (2) is when closing, 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); At the casing other end limited location device of valve shaft limit base (12) lower end, stopping means is horizontally fixed on or level removably is fixed on the sidewall of casing (6); During use, on being installed in pipeline between radiator and the oil pump with the center line of flange from the horizontal by 55 ° of angles, valve plate can rotate along valve shaft, naturally droop by gravity, during the transformer oil forward flow, valve plate naturally droops, 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.

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