CN2116132U

CN2116132U - Non-return wash-out valve

Info

Publication number: CN2116132U
Application number: CN 91224582
Authority: CN
Inventors: 王荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-09-06
Filing date: 1991-09-06
Publication date: 1992-09-16

Abstract

The utility model discloses a non-return wash-out valve which belongs to a frost crack proof discharge valve device for feed piping. The non-return wash-out valve is composed of a valve body, a spring and a rubber pad. The non-return wash-out valve is characterized in that the inside of the valve body is provided with a boss-shaped spacer plate; the point of the center of the boss-shaped spacer plate is provided with a valve core with an axis rod; the valve core is provided with A, B two taper-shaped cutoff surfaces, which can control the flow of the bidirectional water; when the pump is stopped because of accidents, the end of a water inlet is closed, and the drainage end is opened. The utility model has the functions of automatic regulation of opening and closing, which effectively reaches the aim that the piping and the water pump are prevented from being frosted to damage.

Description

Non-return wash-out valve

The utility model belongs to the drain valve device of anti-bursting by freezing in the feed piping.At present, the feedwater piping that the selected scenes, mine is used is in open-air high mountain mostly, and exposes outside.Especially in cold season, because of stopping production, have a power failure or when having an accident termination of pumping, ducted water flow velocity reducing, and can occur flowing backwards, and makes to have water in the pipeline, causes frost crack pipe, not only changing pipeline needs fund, more causing the economic loss of bringing after the maintenance that stops production.

Disclosed safety check in known present technology is that purpose designs to prevent that water from flowing backwards all mostly.Though in use controlled the refluence of water, because of there being a large amount of water in the pipeline,, need maintain and replace in the winter time easily with frost crack pipe, cause manpower, waste on the material resources and loss.

The purpose of this utility model provides a kind of improved non-return drain valve, and when in the feed piping during pumping accident, this valve can drain the water that flows backwards in the pipeline, has realized closing of automatic regulating valve core, has protected water pump and pipeline.

Be provided with boss shape dividing plate (7) in the front valve shell (2) that the technical solution of the utility model is achieved in that a kind of non-return drain valve and rear valve body (16) joint, and the spool (3) of tape spool bar is installed in the center of dividing plate (7), has two taper type stop surface of A, B on the spool (3).

The utility model has compared to existing technology: reasonable in design, and can control bimodal current automatically, and ducted water can be drained in cold season, reduce the maintenance of pipeline, the working life of having improved pipeline.

The drawing explanation of accompanying drawing:

Fig. 1 is a structural drawing of the present utility model.

The utility model will be further described in conjunction with the embodiments:

See accompanying drawing 1.The front valve shell (2) and the rear valve body (16) that adopt cast iron materials to make, be respectively equipped with water intake (1) and water outlet (8) on the front valve shell (2), have spilled water hole (15) on the rear valve body (16), and in the joint of front valve shell (2) and rear valve body (16), rubber cushion (10) and boss shape dividing plate (7) are installed, by bolt (9) its front valve shell (2) and rear valve body (16) are fixed into one, make it boss shape dividing plate (7) and be fixed in the valve body.The boss place of boss shape dividing plate (7) has one by hole (6), central axis has an axle sleeve (12), have some water ports (11) are equipped with the tape spool bar in axle sleeve (12) spool (3) around the axle sleeve (12), spool has A respectively on (3), two taper type stop surface of B, the B end face upper shaft lever (4) of axle sleeve (12) one sides and spool (3) is provided with spring (5), spool (3) is automatically reset, for preventing that spool (3) from coming off, and on the other end of axostylus axostyle (4), be equipped with packing ring (13) and pin (14) is limited, when spool (3) was not worked shape, the A end face contacted with water intake (1) interior edge face; When normal operation, the high pressure water of water intake (1) end reaches the greatest limit position with the A end of spool (3), simultaneously, spring (5) is compressed, the B end of spool (3) is contacted with the hole (6) of ending on the boss shape dividing plate (7), the end that will sluice is closed, and current enter in the piping along water outlet (8); When pumping accident, the flow that flows into water intake (1) end reduces, and the suffered impact of water of spool (3) reduces, under the effect of spring (5) power, its spool (3) is resetted, the A end face is closed feed-water end, and simultaneously, the B end face is opened, make the water in the piping, (11) enter rear valve body (16) along the water port, drain by the sluice pipe that connects, thereby have reached the water releasing and freezing prevention purpose.

Claims

1, a kind of non-return drain valve is made up of front valve shell, rear valve body, spring, rubber cushion, it is characterized in that:

1) is provided with boss shape dividing plate (7) in front valve shell (2) and rear valve body (16) joint;

2) spool (3) of tape spool bar is installed in the center of dividing plate (7);

3) have two taper type stop surface of A, B on the spool (3).

2, by the described non-return drain valve of claim 1, it is characterized in that: have on the boss shape dividing plate (7) by hole face (6) and water port (11).

3, by the described non-return drain valve of claim 1, it is characterized in that: the A on the spool (3), B two sections can be the taper type or the asymmetric taper type of symmetry.