CN2413143Y - Draw-off valve - Google Patents

Abstract

The utility model relates to a drain valve, particularly a drain valve utilizing the liquid level variation of condensed water to drive the opening and closing of the valve. A valve body is provided with an inlet and an outlet, and the inner part of the valve body is provided with a float which is sheathed on a guide rod arranged on the valve body; the bottom of the valve body, the inner part of the guide rod and the space between the float and the guide rod are respectively provided with a passage; the inlet and the outlet of the valve body are communicated with the passages by utilizing an inner cavity of the valve body; the upper end of the float, which corresponds to the passage of the float, is connected with a valve plate which can be matched with the upper end of the passage in the guide rod; the upper part of the valve body is a valve pipe, and the position on the valve pipe, which corresponds to the inlet, is provided with a filter screen. After the utility model is used, application efficiency and service life can be enhanced.

Description

Drain valve

The utility model relates to drain valve, and specifically a kind of liquid level change of utilizing water of condensation is come the drain valve of actuating valve gate switch.

Existing mechanical type drain valve all has shortcomings such as certain leak rate and counterpressure are low, the load water displacement is little, the life-span lacks, need time-based maintenance because of its unreasonable structure.As introduce the loose float trap that day present technique is produced, its sealing is to realize with contacting of valve port by sphere, surface finishment to ball float requires quite high, because of its working procedure is finished in ball float and the continuous knockout process of valve port, the surface of ball float is very easily hit crudely, influences its sealing effect; In addition, the position of its outlet is positioned at the bottom of valve, though this structure is beneficial to draining, when the valve emptying, outlet just is exposed in the steam, thereby can not solve the problem of gas leakage with water seal; Moreover its drainage procedure relies on buoyancy of water to float steel ball to realize that so steel ball just can not be done too heavyly, this just means that steel ball can not improve intensity by increasing its wall thickness; In addition, enter in the drain valve for fear of pipeline rubbish, filter screen is installed in the valve of being everlasting, but the time one is long, filter screen also can stop up, and this just requires the user to need continuous cleaning maintenance, and is cumbersome.

The purpose of this utility model is that design is a kind of does not have leakage, high back pressure, durable, an inexpensive drain valve.

Its main technical schemes is that inlet/outlet is arranged on valve body, there is buoyancy aid its inside, this buoyancy aid is enclosed within on the guide rod that is installed on the valve body, in the bottom of valve body, guide rod and between buoyancy aid and guide rod, passage is set respectively, the inlet/outlet of valve body utilizes the inner chamber of valve body and above-mentioned passage to be interconnected, and the upper end corresponding to its passage connects a valve plate on buoyancy aid, this valve plate can cooperate with the upper end of guide rod internal channel, on the top of valve body is the valve pipe, be used for and being connected of external pipe, filter screen is installed at position corresponding to import on the valve pipe, so that filter out the rubbish in the pipeline; In addition, the shock absorber that can connect an inner band through hole in the upper end of guide rod, form a jetburner in the upper end of shock absorber, valve plate cooperates with the jetburner of shock absorber, play the effect of closing and opening valve, after utilizing high-abrasive material to make this shock absorber, can avoid the wearing and tearing of valve plate and shock absorber, improve working life, between valve plate and shock absorber, spring is set, is used to offset the deadweight of buoyancy aid, in the uniform projection that play the guiding role of the outer wall of guide rod, circulate so that neither influence in the passage of liquid between buoyancy aid and guide rod, can guarantee that again buoyancy aid do not shake when moving up and down.

The utility model has the advantages that: 1, in the valve pipe on drain valve top, filter screen is installed, change the other end of this valve pipe into bypass duct, enter if any rubbish, only can stockpile in the valve pipe, during cleaning, open bypass duct, rubbish will be excluded with the impact of steam, thereby need not the user remove the time-based maintenance drain valve; 2, in the valve pocket of drain valve, the closed stainless steel cylindrical float that one hollow is arranged, and stay a passage at this buoyancy aid center, there is a taper valve plate its upper end, in the bottom center of valve body one vertical hollow guide rod is installed, guide rod has projection outward, after buoyancy aid is enclosed within on this guide rod, can not influence under the situation that current circulate in passage, guarantee that buoyancy aid is in the process of moving up and down, its taper valve plate drops on the jetburner all the time, can both close this mouth at every turn; 3, after being provided with spring between guide rod and valve plate,, can guaranteeing still that also buoyancy aid has enough buoyancy, thereby can improve its working life even suitably increase the wall thickness of valve body in order to improve intensity.

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

As shown in the figure: on the top of valve body 14 is valve pipe 4, there is the passage 15 that is interconnected on bottom and right side at valve body 14, the outlet 9 that is communicated with passage 15 in the right upper portion setting of valve body, in the inner chamber 8 of valve body 14, place columniform buoyancy aid 11, the inner chamber 10 of this buoyancy aid 11 is an airtight cavity, central authorities at buoyancy aid have a bottom to be communicated with the outside, the passage 13 of top seal, and the valve plate 5 of an inverted cone is set on the buoyancy aid of these passage 13 upper ends, bottom center at valve body 14 is installed the guide rod 12 that an inside has passage 16, the lower end of this passage 16 is communicated with passage 15, its upper end is fastenedly connected the shock absorber 7 that there is passage an inside, the passage of this shock absorber 7 is communicated with passage 16 and 13, and form a jetburner in the top, the projection 17 that play the guiding role in the outer wall setting of guide rod 12, buoyancy aid 14 utilizes its passage 13 to be enclosed within the outside of guide rod 12, its valve plate 5 cooperatively interacts with jetburner, work to close and open valve, at shock absorber 7 and 5 of valve plates a stage clip 6 is set, so that offset the deadweight of buoyancy aid 14.At valve body 14 and 4 of valve pipes an import 3 is arranged, and on the valve pipe 4 at this import position filter screen 1 is set, the right side of valve pipe 4 is a bypass duct 2.

Claims (4)

1, drain valve, on valve body (14), have into, outlet (3), (9), there is buoyancy aid (11) its inside, it is characterized in that buoyancy aid (11) is enclosed within on the guide rod (12) that is installed on the valve body (14), bottom in valve body (14), in the guide rod (12) and between buoyancy aid (11) and guide rod (12) passage (15) is arranged respectively, (16), (13), advancing of valve body (14), outlet (3), (9) utilize the inner chamber (8) of valve body (14), passage (13), (16), and (15) are interconnected, and the upper end corresponding to its passage (13) connects a valve plate (5) on buoyancy aid (11), and this valve plate (5) can cooperate with the upper end of passage (16).

2, valve according to claim 1 is characterized in that on the top of valve body (14) being valve pipe (4), goes up corresponding to the position of import (3) at valve pipe (4) filter screen (1) is installed.

3, valve according to claim 1, it is characterized in that connecting the shock absorber (7) of an inner band through hole in the upper end of guide rod (12), form a jetburner in the upper end of shock absorber, valve plate (5) cooperates with the jetburner of shock absorber (7), and between valve plate (5) and shock absorber (7) spring (6) is set.

4, valve according to claim 1 is characterized in that in the uniform projection that play the guiding role of the outer wall of guide rod (12) (17).

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