CN2157363Y

CN2157363Y - Lift-type check stop valve

Info

Publication number: CN2157363Y
Application number: CN 93211219
Authority: CN
Inventors: 靳卫新
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-06
Filing date: 1993-05-06
Publication date: 1994-02-23
Anticipated expiration: 2003-05-06

Abstract

The utility model relates to a lift-type check stop valve, which is characterized in that a sliding rod is arranged on the upper part of a valve core, and the sliding rod forms a sliding fit with a sliding cavity on the lower end of a valve rod. The utility model has both functions of stop valves and check valves so as to realize liquid flow control and the cutoff of unidirectional flow of liquid and fluid. The utility model has the characteristics of simple structure, convenient maintenance, easy operation, etc.

Description

Lift-type check stop valve

The utility model relates to a kind of rise-fall type non-return stop valve of controlling fluid flow and one-way flow.

The spool and the valve rod of traditional rise-fall type stop valve are structure as a whole, and by rotation hand wheel valve rod drive spool are moved and control fluid flow; The spool of safety check moves up at the gland sliding cavity by the pressure of fluid, realizes that pipeline is defeated logical, and when backpressure strengthened, spool descended, thereby had prevented the reverse flow of fluid.Traditional using method is that above-mentioned two kinds of valves are connected on the pipeline, and a stop valve is used for controlling fluid flow, and a safety check is used for controlling one-way flow, this using method not only uses valve many, the active position that has occupied pipeline, and amount of maintenance is big, and expense is also high.

Order of the present utility model has the shortcoming and deficiency that is to overcome above-mentioned prior art, a kind of rise-fall type non-return stop valve that the simple function of stop valve and safety check is combined as a whole is provided, thereby has replaced traditional using method of bivalve control fluid flow and one-way flow.

The purpose of this utility model realizes by following technical proposal: rise-fall type non-return stop valve, comprise handwheel, valve body, spool, valve rod, little gland, big gland, it is characterized in that with valve rod and spool be the structure of one, be modified into valve rod and spool divides body structure, on spool top sliding bar is arranged, the sliding cavity that has the spool slide bar to slide in the valve rod lower end.

Owing to taked technique scheme to make to the utlity model has opening and closing flexible, blocking-up is closed tight, under the prerequisite that does not influence flow, reduced the local losses of pipeline, help reducing expenses, this valve arrangement is simple, and is novel, easy to maintenance, simple to operate.

Description of drawings:

Fig. 1 is the utility model structural representation.

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

Rise-fall type non-return stop valve, comprise handwheel (1), valve body (5), spool (6), valve rod (2), tegillum is pressed (3), big lid is pressed (4), valve rod and spool separated into two parts, sliding bar (7) is arranged on spool top, the sliding cavity (8) that has the spool slide bar to slide in the valve rod lower end, by the slip of spool sliding bar in sliding cavity, control the one-way flow of fluid, played the action function of safety check, change the spatial altitude of valve rod again, just limited the distance that spool slides up and down, thereby reached the control fluid flow to the purpose of blocking fluid fully, promptly played the action function of stop valve, so this valve replaced the using method of bivalve, replaced by two kinds of functions of a valve.

According to aufbauprinciple of the present utility model, can improve stop valve, as long as valve rod and spool split are made, on spool, process slide bar, the valve rod lower end processes the sliding cavity that a spool slide bar slides, do not change other parts virtually any size, just can produce rise-fall type non-return stop valve, for Lift check valve, make the sliding cavity gland into belt spool valve rod that slides and the gland of being with the valve rod rotary chamber, promptly become rise-fall type non-return stop valve, be applicable to the horizontal pipe installation, and can normally use.

Using method: when fluid enters valve, spool and sliding bar are moved in sliding cavity, this moment, pipeline was defeated logical, if when backpressure strengthens, forced spool and slide bar to move down again, had prevented the fluid reverse flow, promptly guaranteed one-directional fluid flow; By handwheel, adjust the upper and lower position of valve rod, promptly adjusted the height of sliding cavity, just spool and slide bar sliding distance change, thereby have realized the flow of control fluid or blocked fluid, control the one-way flow of fluid again.

Claims

1, a kind of rise-fall type non-return stop valve comprises handwheel, valve body, spool, valve rod, little gland, big gland, it is characterized in that sliding bar is arranged at spool top, the sliding cavity that the valve rod lower end has the spool slide bar to slide.