CN101266018A - Self-closing fixed pivot lever bucket type high pressure steam drainage valve - Google Patents

Abstract

The invention relates to an automatically-closing fixed-support lever bucket-type high pressure steam trap valve, which is characterized in that a valve body (1) is fastened with a valve cover (20) through equaling stud bolts and nuts, flanges (10) are horizontally welded on the inlet end and the outlet end of the valve cover, respectively. The inner cavity of the valve body is provided with a bucket (3), and an L-shaped inlet tube (2), the upper end of the valve body is connected with the valve cover through threads, and communicates with a water inlet, and the lower end of the valve body extends into the lower cavity of the bucket. A valve seat (15) is connected on the lower end face of the valve cover through threads and communicates with a water outlet, a valve plug (24) is arranged inside a support (23), the bracket is fixedly connected on a fixed-support lever (8) through cotter pins, the fixed-support lever is connected on a bracket (13) through cotter pins, the bracket is connected on the lower end face of the valve cover through hexagon head bolts, and the bucket is fixed through a davit (4) and a locking nut (5), and connected on the fixed-support lever through a pin roll (6) and a cotter pin (7). The automatically-closing fixed-support lever bucket-type high pressure steam trap valve has the advantages of small steam leakage loss, rate of load steam loss at less than 2%, large working pressure range, no influence on drainage after the pressure is changed, and high rate of back pressure, and can drain condensed water in time, and be favorable for recycling the condensed water.

Description

A kind of self-closing fixed pivot lever bucket type high pressure steam drainage valve

Technical field

The present invention relates to a kind of hanging bucket type drain valve, can satisfy high pressure steam drainage valve eliminating water of condensation and non-condensable gas more specifically to a kind of, stop the usage requirement of steam leakage, and help a kind of self-closing fixed pivot lever bucket type high pressure steam drainage valve that water of condensation is recycled.

Background technique

At present, known fixed pivot lever bucket type Automatic steam trap Trap has two kinds, and a kind of is fixed pivot lever bucket type, and another kind is that fixed pivot lever and piston set are box-like.Existing fixed pivot lever bucket type Automatic steam trap Trap just can not regular event greater than 4.5MPaG at Maximum operating pressure, and existing fixed pivot lever differential piston hanging bucket type Automatic steam trap Trap just can not regular event less than 0.05MPaG at operating pressure differential.

Summary of the invention

The technical problem to be solved in the present invention is: overcoming existing fixed pivot lever bucket type Automatic steam trap Trap just can not regular event greater than 4.5MPaG at Maximum operating pressure, existing fixed pivot lever differential piston hanging bucket type Automatic steam trap Trap operating pressure differential less than 0.05MPaG just can not regular event defective, provide that a kind of range of working pressure is big, the fixed pivot lever bucket type high pressure steam drainage valve of the single valve seat cut-off type of stability and good reliability, self-alignment, automatic closing.

For solving the problems of the technologies described above, the present invention includes valve body, valve gap, its characteristics are: the wrap style sealing gasket is housed between valve body and the valve gap, adopts isometric stud bolt B level and nut tight.Flange is the slotting valve gap inlet/outlet end that is welded in of level respectively.Body cavity is equipped with well-bucket, and its top is provided with exhaust port, and the counterweight ring is housed in the well-bucket.Body cavity also is equipped with

The shape intake pipe, its upper end is threaded with valve gap and communicates with the water inlet on the valve gap left side, and its lower end is stretched in the counterweight ring inner chamber.One end of valve seat is equipped with seal ring and is threaded with valve gap, and communicates with the osculum on valve gap the right, and the other end of valve seat is contained on the carriage in the associated hole, is fixed by circlip for shaft.The other end of carriage is loaded onto spider by hexagon head bolt by carriage and is threaded with valve gap.Spool is contained in the bracket holes, and support is connected by cotter pin to be decided on the pivot point lever together, and fixed pivot lever is connected on the carriage by straight pin.One end of the other end of fixed pivot lever and davit is connected by bearing pin, and cotter pin is fixed, and the other end of davit is fixed by locking nut by well-bucket.Valve seat is a step through-hole, and its small bore end is 90 ° of taper holes, and the spool external diameter is step-like, and its little head end is 90 ° of conical surfaces.

The present invention can provide a kind of type mechanical steam valve that is applicable to range of working pressure 0.01MPaG～7.0MPaG that high pressure steam transfer line and steam indirect heated component are selected for use to the user, at operating pressure differential less than functional reliability height under the 0.05MPa, simultaneously can in time get rid of water of condensation, the steam leakage loss is little, Rate of load steam loss＜2%, the operating pressure scope is big, does not influence the discharge capacity action after the variation in pressure, the Rate of back pressure height helps water of condensation and reclaims. Shape intake pipe and body cavity are full of water of condensation all the time, and carbonated drink is separated reliable.The well-bucket top design is led to the vapour aperture, can eliminate the stifled and steam vapour lock of air gas.Be active in one's movements, reliably, noise is little, long service life (greater than 16000 hours).Level is easy for installation, and all parts all are installed on the valve gap in the chamber, on pipeline, keep in repair easily, and beautiful shape, weight is lighter, low price.

Description of drawings

The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.

Fig. 1 is the structure cross-sectional schematic of a kind of self-closing fixed pivot lever bucket type high pressure steam drainage valve of the present invention.

Fig. 2 is the plan view of Fig. 1.

Fig. 3 is the enlarged view at A place among Fig. 1.

Fig. 4 is the schematic representation for the air in a kind of lever piston bucket type high pressure steam drainage valve cavity of the present invention, low-temperature condensate, steam, condensed water in high temperature.

Fig. 5 is the initial schematic representation of working principle of the present invention.

Fig. 6 is in the original state schematic representation for spool 24 in the working principle of the present invention.

Fig. 7 is in the closed condition schematic representation for spool 24 in the working principle of the present invention.

Fig. 8 opens for spool in the working principle of the present invention 24, enters new recurrent state schematic representation.

Embodiment

In Fig. 1,2,3: between valve body 1 and the valve gap 20 wrap style sealing gasket 11 is housed, adopts isometric stud bolt B level 19 and nut 18 fastening.Valve body 1, valve gap 20 adopt the 15CrMo forging to be welded by high pressure P N100 design, and flange 10 adopts standard flange to design.Valve body 1 wall thickness and pressure rating meet the regulation of GB/T12224-2005 " steel valve fitness for purpose ".Flange 10 is the slotting valve gap 20 inlet/outlet ends that are welded in of level respectively.Valve body 1 inner chamber is equipped with well-bucket 3, and well-bucket 3 tops are provided with exhaust port 26, and effect is: eliminate the stifled and steam vapour lock of air gas.Counterweight ring 27 is housed in the well-bucket 3, and its effect is: the weight according to different pressures utilization increase and decrease counterweight ring 27 comes the weight of balance well-bucket 3 to make it to reach equalising torque, and valve body 1 inner chamber also is equipped with

Shape intake pipe 2, its upper end is threaded with valve gap 20 and communicates with the water inlet on valve gap 20 left sides, and its lower end is stretched in counterweight ring 27 inner chambers.Valve seat 15 is a step through-hole, its small bore end is 90 ° of taper holes, and valve seat 15 1 ends are equipped with seal ring 14 and are threaded with valve gap 20, and communicates with the osculum on valve gap 20 the right, the other end of valve seat 15 is contained on the carriage 13 in the associated hole, and is fixing by circlip for shaft 21.The other end of carriage 13 is loaded onto spider 12 by hexagon head bolt 9 by carriage 13 and is threaded with valve gap 20.The thickness of spider 12 should be identical with valve seat 15 major diameter thickness, and its effect is: make carriage 13 at horizontal position.Spool 24 external diameters are step-like, and its little head end is 90 ° of conical surfaces, match with 90 ° of taper holes of small bore end of valve seat 15.Spool 24 is contained in support 23 holes, and support 23 is a step through-hole, is connected on fixed pivot lever 8 by cotter pin 25.Fixed pivot lever 8 is connected on the carriage 13 by straight pin 22.The other end of fixed pivot lever 8 is connected by bearing pin 6 with an end of davit 4, and is fixing by cotter pin 7, and the other end of davit 4 is by well-bucket 3, and is fixing by locking nut 5.One end of davit 4 is a screw thread, and its other end is an optical axis, and optical axis end diameter is greater than associated aperture on the well-bucket 3.Label 17 is fixed on the valve gap 20 by two rivets 16.Label 17 is fixed on the valve gap 20 by two rivets 16.

Working principle of the present invention is such: after self-closing fixed pivot lever bucket type high pressure steam drainage valve is installed on the pipeline, start working automatically as Fig. 5,6,7,8 signal.When beginning to lead to vapour, well-bucket 3 and counterweight ring 27 are in valve body 1 intracavity bottom, make valve seat 15 be opening state, and low-temperature condensate discharges rapidly, meanwhile discharged air (seeing accompanying drawing 5).Temperature raises gradually in the valve, and well-bucket 3 tops begin to pour small amount of steam, but well-bucket 3 do not float yet, and spool 24 still is in original state, and condensed water in high temperature continues discharging (seeing accompanying drawing 6).When condensed water in high temperature drained soon, steam was full of well-bucket 3 tops, and buoyancy rises well-bucket 3 and counterweight ring 27, drives spool 24 simultaneously and closes (seeing accompanying drawing 7).Along with well-bucket 3 inner chamber steam reduce, buoyancy descends, and well-bucket 3 is sunk, and drives spool 24 opening water discharges simultaneously, enters new circulation work automatically (seeing accompanying drawing 8).

In sum: it is 1mm that the present invention has adopted spool 24 shutoff strokes, and the gap is the new self-alignment of 0.5mm, automatic closing system (being anti abrasive new SCCV shutdown system).After top of chamber in the well-bucket 3 fills the vapour height and surpasses that equalising torque is required and fill the vapour height, well-bucket 3 quickens to rise, when davit 4 upper-end surfaces that connect well-bucket 3 and fixed pivot lever 8 contact the following Transverse plane of valve gap 20, spool 24 is equipped with the 1mm stroke from close stance, glade plane space 0.5mm, spool 24 under the effect of pressure medium, utilizes the hole of 90 ° of conical surface self-alignments, self acting stop valve seat 15 in adsorption force that water of condensation flows out at a high speed and valve body 1 chamber under the effect of inertia that moves upward.New automatic closing system is the error of compensating lever mechanism generation automatically, produce rigid collision when avoiding closing, make spool 24 in closing closed procedure, have buffer function, the wearing and tearing of spool 24 valve seats 15 have been reduced, increase the service life, close all very reliably after drain valve uses initial stage and wearing and tearing, and switch motion is very sensitive, at pressure reduction less than also can regular event under the 0.01MPaG.

The present invention has selected reasonably uncovered downward float (well-bucket 3) of weight and size, it is the dynamical element of this Automatic steam trap Trap, utilize the torque equilibrium equation formula to calculate weight and the size of selecting well-bucket 3, it should satisfy and fills the vapour height in the moment equilibrium state well-bucket be not less than 40mm under Maximum differential pressure, fills vapour height allowance and be not less than 45mm in Minimum differntial pressure 0.01MPaG equalising torque attitude well-bucket.Well-bucket weight of the present invention is 890 ± 60 grams, size Φ 100X180X1 (wall thickness) * 3 (top thickness), and unit is mm.Adapted valve seat orifice Φ 8mm, lever ratio 57mm/7.2mm, filling the vapour height in the equalising torque attitude well-bucket when Maximum differential pressure 7.0MPaG is 62mm, filling the vapour height in the equalising torque attitude well-bucket when Minimum differntial pressure 0.01MPaG is 123mm, filling vapour height allowance is 180-123=57mm, all satisfy reasonable weight and size requirement, can guarantee drain valve switch motion normal reliable in 0.01MPaG～7.0MPaG operating pressure differential scope well-bucket.Or well-bucket weight be 1560 ± 100 the gram, be of a size of Φ 132 * 180 * 1 (wall thickness) * 3 (top thickness), unit is mm.Adapted valve seat orifice Φ 4mm, lever ratio 57mm/7.2mm, be that to fill the vapour height be 45mm to equalising torque attitude well-bucket when Maximum differential pressure 7.0MPaG, be that to fill the vapour height be 123mm to equalising torque attitude well-bucket when Minimum differntial pressure 0.01MPaG, filling vapour height allowance is 180-123=57mm, all satisfy reasonable weight and size requirement, can guarantee drain valve switch motion normal reliable in 0.01MPaG～7.0MPaG operating pressure differential scope well-bucket.The present invention is the single valve seat conical surface cut-off type, self-alignment of a kind of pressure height, stability and good reliability, closes the truck dead lever bucket type high pressure steam drainage valve automatically.

Claims (3)

1, a kind of self-closing fixed pivot lever bucket type high pressure steam drainage valve comprises valve body (1), valve gap (20), it is characterized in that:

Between a, valve body (1) and the valve gap (20) wrap style sealing gasket (11) is housed, adopts isometric stud bolt B level (19) and nut (18) fastening; Flange (10) is slotting valve gap (20) the inlet/outlet end that is welded in of level respectively;

B, valve body (1) inner chamber are equipped with well-bucket (3), and its top is provided with exhaust port (26), and counterweight ring (27) is housed in the well-bucket (3); Also be equipped with

Shape intake pipe (2), its upper end is threaded with valve gap (20) and communicates with the water inlet on valve gap (20) left side, and its lower end is stretched in counterweight ring (27) inner chamber;

One end of c, valve seat (15) is equipped with seal ring (14) and is threaded with valve gap (20), and communicates with the osculum on valve gap (20) the right, and its other end is contained in carriage (13) and goes up in the associated hole, and is fixing by circlip for shaft (21); The other end of carriage (13) is loaded onto spider (12) by hexagon head bolt (9) by carriage (13) and is threaded with valve gap (20);

D, spool (24) are contained in support (23) hole, and support (23) is connected on fixed pivot lever (8) by cotter pin (25); Fixed pivot lever (8) is connected on the carriage (13) by straight pin (22);

One end of the other end of e, fixed pivot lever (8) and davit (4) is connected by bearing pin (6), and cotter pin (7) is fixing, and the other end of davit (4) is by well-bucket (3), and is fixing by locking nut (5);

2, a kind of self-closing fixed pivot lever bucket type high pressure steam drainage valve according to claim 1 is characterized in that: valve seat (15) is a step through-hole, and its small bore end is 90 ° of taper holes.

3, a kind of self-closing fixed pivot lever bucket type high pressure steam drainage valve according to claim 1 is characterized in that: spool (24) external diameter is step-like, and its little head end is 90 ° of conical surfaces.

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