CN2347002Y

CN2347002Y - Check valve for bidirectional passing pipe cleaner

Info

Publication number: CN2347002Y
Application number: CN 97202959
Authority: CN
Inventors: 蒲家宁; 李旭东
Original assignee: Logistical Engineering University of PLA
Current assignee: Logistical Engineering University of PLA
Priority date: 1997-04-04
Filing date: 1997-04-04
Publication date: 1999-11-03
Anticipated expiration: 2007-04-04

Abstract

The two-way passing pipe cleaner check valve is used for liquid conveying pipeline and can make the liquid passing pipe cleaner pass in two directions and flow in one direction. The gate valve is simple in structure, easy to manufacture, convenient to use and similar to a common gate valve in appearance. The two-way check valve comprises a valve shell, a valve rod, a hand wheel, a flashboard, a check board and the like. The wedge-shaped flashboard is provided with a check plate for controlling the flow direction of the fluid. When the gate is operated by hand wheel to lower to lowest position, the valve can be used as ordinary check valve to control fluid flow in one direction only, and when the gate is operated by hand wheel to be lifted into the upper cavity of the valve, the lower part of the valve body can pass through cleaning pipe in two directions.

Description

Opposing traffic wiper safety check

The utility model relates to the valve of the permission wiper opposing traffic liquid one-way flow on the long transfusion fluid pipeline.On long transfusion fluid pipeline, in order to prevent liquid return or to cut off purpose such as hydraulic pressure of pipe line safety check need be installed, for clean, operations such as emptying, sequential delivery isolation, need in pipeline, pass through wiper.Need to carry out reverse emptying operation in some cases,, also may need oppositely to carry according to the variation of actual conditions.Therefore, needing can two-way safety check by wiper.

At present, domestic and international existing safety check can not or can only the one-way trip wiper.Some pipework is adopted safety check is installed in the problem that way on the bypass line solves the opposing traffic wiper, will establish Valves and Fittings so more, increases act of operation.

The purpose of this utility model provides a kind of non-return effect that plays when normal oil transportation, clean, can two-way safety check during operation such as emptying, sequential delivery isolation by wiper, be directly installed on the person in charge.

The utility model purpose is achieved in that by valve body, valve gap and Gland etc. and constitutes valve chest, forms opposing traffic wiper safety check by valve chest, valve rod, handwheel, flashboard and check plate.Handwheel is equipped with on the top of valve rod, and the bottom links to each other with flashboard by binding block, and flashboard is a wedge shape, and a Boilor check valve seat is arranged in the plate, and check plate covers on Boilor check valve seat owing to action of gravity.Can handle whole valve plate by handwheel and move up and down, when normal the conveying, handle flashboard by the handwheel rotation valve rod and descend fully and put in place, this valve plays the effect of general check valve, and liquid stream can forward flow, and liquid stream reverse flow then is prevented from.When needs to either direction when the wiper, when handling in the upper cavity that flashboard rises to valve fully by the handwheel rotation valve rod, valve body lower portion promptly can be passed through wiper.

Owing to adopt such scheme, only need to handle the flashboard lifting by handwheel, just can determine it is by wiper, still make safety check and use, adopted the flashboard of band safety check on the structure, easy to operate, simple in structure.

Below in conjunction with accompanying drawing the utility model is further specified.

Accompanying drawing is a structure principle chart of the present utility model.

1. Boilor check valve seats, 2. bearing pins, 3. valve bodies, 4. valve gaps, 5. Glands, 6. handwheels, 7. valve rods, 8. binding blocks, 9. connecting rods, 10. check plates, 11. valve seats, 12. flashboards among the figure

In the accompanying drawings, in the valve body similar to common gate valve (3), valve rod (7) lower end links to each other with flashboard (12) by binding block (8), and flashboard (12) is a wedge shape, valve seat last time (1) is arranged, as the passage of safety check in the plate.The check plate (10) that links to each other with binding block (8) by connecting rod (9) and bearing pin (2) covers on Boilor check valve seat (1) owing to action of gravity.Flashboard (12) constitutes one group of sealing pair with valve seat (11), and the Boilor check valve seat (1) on check plate (10) and the flashboard (12) constitutes another group sealing pair.Can handle whole flashboard (12) by handwheel (6) and move up and down, and can remain on upper and lower two limit positions.

Claims

1, a kind of opposing traffic wiper safety check is made up of valve chest, valve rod (7), handwheel (6), flashboard (12) and check plate (10) etc., valve chest is by valve body (3), valve gap (4), Gland formations such as (5), handwheel (6) is equipped with on the top of valve rod (7), the bottom links to each other with flashboard (12) by binding block (8), it is characterized in that flashboard (12) is wedge shape, one Boilor check valve seat (1) is arranged in the plate, and check plate (10) covers on Boilor check valve seat (1) owing to action of gravity.

2, opposing traffic wiper safety check according to claim 1 is characterised in that check plate (10) links to each other with junction piece (8) by connecting rod (9) and bearing pin (2).

3, according to claim 1,2 described opposing traffic wiper safety check, be characterised in that two groups of sealing pairs are arranged in the valve: one group is valve seat (11) formation on flashboard (12) and the valve body, and another group is the formation of the Boilor check valve seat (1) on check plate (10) and the flashboard (12).