CN2154390Y

CN2154390Y - Efficient check valve

Info

Publication number: CN2154390Y
Application number: CN 93205069
Authority: CN
Inventors: 王英根; 张方柱; 李国权
Original assignee: SHASHI OPTICAL TECHNOLOGY INST HUBEI PROV
Current assignee: SHASHI OPTICAL TECHNOLOGY INST HUBEI PROV
Priority date: 1993-03-03
Filing date: 1993-03-03
Publication date: 1994-01-26
Anticipated expiration: 2003-03-03

Abstract

The utility model relates to an efficient check valve. A valve seat is designed between two same valve bodies; a 'T'-typed valve core can realize the opening or closing of the valve by the water pressure of the delivering water or boiler water, and gas pressure capable of doing fore-and-aft movement on the valve seat. The utility model has the advantages of reasonable and novel structure, easy maintenance, and low cost. The utility model can effectively prevent the boil water, and gas from leaking, improving the working environment of the boiler house, and effectively protecting the water delivery pump and the electrical machine. The utility model is an ideal upgrading and generation replacing production of the boiler check valve.

Description

Efficient check valve

The utility model relates to valve, specially refers to safety check.

Boiler water delivery safety check of the prior art generally all is connected on the valve seat with spring on its spool.During work, water enters the back by feed-water end and leans on the tension force promotion spool of spring to move forward, and makes opening of valves, and water enters in the boiler, carries when water to finish, and spring reset moves spool backward and resets, and valve cuts out.Its spring easy-to-rust damages, and causes water, gas leakage serious, and the valve maintenance is complicated, and working life is short.

The purpose of this utility model is to provide a kind of efficient safety check, and it is to utilize pressure that spool is closed and Open valve after moving on the valve seat, thereby reaches water delivery and block gas, water backflow, makes water, gas not have leakage.And valve is easy to maintenance, long service life.

The technical solution of the utility model realizes as follows:

The utility model is made up of valve body, valve seat, spool, and a valve seat is arranged between two identical valve bodies, and on the valve seat of spool in valve body, stop collar is the inside of a valve body therein.

Valve seat is "T"-shaped, and there is a through hole inside, and the end face of big end has two equidistant water delivery through holes at least.

Spool is "T"-shaped, matches with the through hole of valve seat inside in the outside of its small end.

The inside of stop collar is a through hole, and it is outside for to match with valve inner, and there is through hole the outside

Advantage of the present utility model is as follows:

The utility model novel structure owing to removed parts such as spring, improves the working life of valve on the valve seat greatly.Generally in 3-5, just change spool, a valve seat and realized that the boiler feed water end does not have leakage, improved on-the-spot working environment, effectively protected water transport pump, motor.Simultaneously, saved maintenance expenses, and easy to maintenance.Because design has stop collar in the structure of the present utility model, can prevent spool come off its spool of back and not water purification source, foreign matter enter boiler, effectively protected boiler safety production.

The utility model will be further described for embodiment in conjunction with the accompanying drawings:

Figure: efficient check valve structure schematic representation.

Valve body (1), (2), valve seat (3), spool (4), stop collar (5), two identical valve bodies (1), (2) are connected in the both sides of valve seat (3) respectively, the small end of valve seat (3) is in valve body (1), the big end of spool (4) is in valve body (2), small end is in the through hole of valve seat (3), and stop collar (5) is in valve seat (2).

Its working procedure is as follows:

When the feed-water end water transport pump does not start,, blocked the boiler steam and refluxed because the pressure effect of boiler makes the water hole on spool (4) closed valve seat (3).

When the feed-water end water transport pump started, the pressure of feed-water end was greater than the pressure of waterexit end, and spool (4) moves forward to stop collar (5).At this moment, spool (4) complete opening, water is entered in the valve body (2) by the water hole on the valve seat (1), again by the treatment hole on the stop collar (5), is injected in the boiler by the waterexit end.Water delivery finishes, and water transport pump quits work, and its spool (4) is owing to the pressure of boiler and the effect of gravity, and spool (4) moves to valve seat (3) backward, and the water hole on the valve seat (3) is sealed once more, has blocked the backflow of boiler steam.

Claims

1, a kind of efficient safety check, form by valve body (1), (2), valve seat (3), spool (4), it is characterized in that: a valve seat (3) is arranged between two identical valve bodies (1), (2), and spool (4) is in valve body (2) and on valve seat (3), and stop collar (5) is in valve body (2).

2, according to the efficient safety check of claim 1, it is characterized in that: valve seat (3) is for "T"-shaped, and inside is through hole, and the end face of big end has two equidistant through holes at least.

3, according to the efficient safety check of claim 1, it is characterized in that: spool (4) is for "T"-shaped, and the interior through hole of the outside of its small end and valve seat (3) matches.

4, according to the efficient safety check of claim 1, it is characterized in that: the inside of stop collar (5) is through hole, and match with the endoporus of valve body (2) in its outside, and there is through hole the outside.