CN201202960Y

CN201202960Y - Y-shaped anti-return bellow-type steam drain valve

Info

Publication number: CN201202960Y
Application number: CNU2008200747594U
Authority: CN
Inventors: 李生辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-05-15
Filing date: 2008-05-15
Publication date: 2009-03-04
Anticipated expiration: 2018-05-15

Abstract

Disclosed is a steam heating device, in particular to a Y-shaped anti-circumfluence sylphon steam water drain valve for automatically blocking steam and draining water of the steam pipe network and the condensate water recycling system. The valve body is provided with a filter which has large area and is inclined downwards by 45 degrees, and high-density filtering net is arranged in the filter and can replace the filter which is arranged at the front end of the water drain valve in the pipe network; next, a raised check valve is arranged on the valve pedestal in the valve, so as to prevent the medium to be drained from generating circumfluence, the valve pedestal can replace the check valve at the rear end of the water drain valve in the pipe network; the utility model can solve the problems that the water drain valve has poor capability of anti-impurity in the process of usage and has not anti-circumfluence function, and can directly improve the service life and the economic benefit of the water drain valve.

Description

Y type anti-backflow bellows-type Automatic steam trap Trap

Technical field

The utility model is a kind of industrial department steam-heating apparatus that is used for, the Automatic steam trap Trap product of steam pipe system and the automatic block steam and drain water of condensate return system.

Background technique

The drain valve kind of Shi Yonging is a lot of in the market, wherein, using in steam pipe system is the heat static force type drain valve more widely, this form drain valve requires than higher the turbidity test of working environment, so applying unit need be installed a filter in pipeline the place ahead when drain valve is installed, its role is to stop in the pipeline because the impurity of mixed vapour or scum that welding process is left over produce the opening/closing system of drain valve disturbs.Therefore, applying unit owing to the operating mode demand, just must increase the cost of a filter in the valve arrangement investment cost of steam pipe system.

In addition, heat static force type drain valve does not in the market possess the condensate return of preventing function, the installation requirement of drain valve and service behaviour are just produced very big restriction: if first, the drain valve rear end carries out water of condensation and reclaim, then the pipeline of different pressures grade must separately reclaim, otherwise irretrievable problem will appear in the water of condensation of the low pipeline of pressure rating; When the second, the Rate of back pressure of drain valve is higher than upstream pressure, drain valve can't carry out normal drainage works; Three, the water outlet pipeline of drain valve can not have the climbing highway section, otherwise when pipeline stopped steam supply, the water of condensation in climbing highway section relied on gravity to produce and refluxes, and will cause drain valve and pipeline ponding.Such as these frequent generations and masty problem in reality is installed, all, drain valve do not produce owing to not possessing the anti-backflow function.

Summary of the invention

The existing anti-impurity interference performance of Automatic steam trap Trap is poor in order to solve, investment joint expense height, do not possess problem such as anti-backflow function, the utility model is to existing heat static force type drain valve, particularly the structure of bellows-type Automatic steam trap Trap and opening/closing system reasonably improve, a kind of Y type anti-backflow bellows-type Automatic steam trap Trap is provided, this drain valve not only possesses the anti-backflow function, and the function of filter safety check and the function of drain valve united two into one, realize potent filtering function.

Y type anti-backflow bellows-type Automatic steam trap Trap provided by the utility model, mainly form by valve gap, valve body, valve seat, bellows, spring, convex non-return valve block, bolt, filter screen, filter screen plug, the valve body external form contains the pipeline of downward-sloping miter angle, the high density filter net is installed in the pipeline, processes by corrosion resistant plate by the laser drilling machine manufacturing; The most important thing is, the utility model has been done very big improvement at the valve seat of this drain valve, be provided with convex non-return valve block in valve seat inside, fully reached the function that prevents that water of condensation from refluxing, effectively avoid drain valve a large amount of seeping phenomenons in use to occur, especially externally it is freezing that the state that temperature is lower produces ponding down, causes the phenomenon that the whole piece pipeline is freeze-up.

In sum, the utility model has been avoided the deficiency in the existing Automatic steam trap Trap technology fully, and the energy conservation of applying unit has been had direct practical function by improving, and has improved the working life and the economic benefit of Automatic steam trap Trap significantly.

Description of drawings

The utility model concrete structure is provided in detail by following embodiment and accompanying drawing thereof.

Fig. 1 is the longitudinal sectional drawing of Y type anti-backflow bellows-type Automatic steam trap Trap.

Fig. 2 is the sectional drawing of bellow element among Fig. 1 (4) and valve seat (5).

Among Fig. 1, (1) valve body, (2) valve gap, (3) spring, (4) bellow element, (5) valve seat, (6) convex non-return valve block, (7) bolt, (8) filter screen, (9) filter screen plug.

Among Fig. 2, (1) bellows, (2) valve seat, (3) convex non-return valve block.

Embodiment

As shown in Figure 1, when the mixed vapour in pipe network enters Y type anti-backflow bellows-type Automatic steam trap Trap, at first by corrosion resistant plate high density filter net (8) by the laser beam drilling manufacturing, the turbidity test of the vapor mixing gas after purifying are significantly improved, mixed gas enters the valve pocket of drain valve subsequently, arrive the sequencing of valve pocket according to mixed gas ingredient in the pipeline, drain valve begins following work: what at first enter valve pocket is air and condensed water, at this moment bellow element (4) is in opening state with the surface of contact of valve seat (5), under the operating pressure differential effect, air and condensed water are discharged rapidly by valve seat (5); After these two kinds of circulation mediums rack up, and then the medium that enters valve pocket is the elevated temperature heat water of condensation, because the temperature of thermal coagulation water is near saturated vapour, temperature is higher, enter the heat exchange effect takes place rapidly behind the valve pocket, impel whole valve pocket constant speed to heat up, when the temperature in the valve pocket during still less than the temperature sensor of bellow element (4), bellow element (4) still is in open mode with the surface of contact of valve seat (5), and the elevated temperature heat water of condensation is also discharged rapidly by valve seat (5); The medium that enters valve pocket at last is a high-temperature steam, by the heat exchange effect, the room temperature of valve pocket reaches the temperature sensor of bellow element (4), make the heated liquid vaporized expanding in the bellow element (4), volume increases, and airtight that promotes bellow element (4) inside is withstood valve seat (5), after surface of contact is sealed, high-temperature steam is stored in valve pocket inside immediately, and drain valve quits work; When producing water of condensation once more in the pipe network, the room temperature of valve pocket is lower than the temperature sensor of bellow element (4) again, bellow element (4) reduces with temperature and changes, inner liquid changes liquefaction into by vaporization, volume shrinkage, drive diaphragm and break away from valve seat (5), thereby open drain valve, discharge water of condensation rapidly; Bellow element (4) changes to produce with vapor (steam) temperature vaporizes and condensation promotion valve block switch spool, finishes block steam and drain water again and again; When pipe network stop supplies steam, when the back pressure of drain valve outlet was higher than the working pressure of front end inlet, the anti-backflow system of this drain valve started working.

As shown in Figure 2, convex non-return valve block (3) can the easy on and off activity in valve seat (2) inside, and when the outside discharge medium of drain valve, convex non-return valve block (3) is pulled to the bottom of valve seat (2), and medium flows out from the aperture on convex non-return valve block (3) next door; Back pressure when the drain valve rear end is higher than upstream pressure, and medium produces when refluxing, and convex non-return valve block (3) is pushed up the top of valve seat (2), lives valve seat by the convex sealing structure of convex non-return valve block (3), plays the anti-backflow effect.

Claims

1, Y type anti-backflow bellows-type Automatic steam trap Trap, structure is valve body (1), valve gap (2), spring (3), bellow element (4), valve seat (5), convex non-return valve block (6), bolt (7), filter screen (8), filter screen plug (9), it is characterized in that valve body (1) is provided with the large size filter of downward-sloping 45, valve body (1) is inner to be fixed together bellow element (4) and the valve seat (5) that is provided with convex non-return valve block by spring, forms the open-shut device of drain valve, and valve gap (2) fits mutually by bolt (7) and valve body (1).

2,, it is characterized in that described valve body (1) external form contains the large size filter of downward-sloping 45, interior dress high density filter net (8) according to the Y type anti-backflow bellows-type Automatic steam trap Trap described in the claim 1.

3,, it is characterized in that described valve seat (5) inside is provided with convex non-return valve block (6) according to the Y type anti-backflow bellows-type Automatic steam trap Trap described in the claim 1.