FR2504640A1 - STEAM PURGEUR - Google Patents

Abstract

THE FLOAT TRAP INCLUDES A VERTICAL BASE PLATE 2 ON WHICH IS REMOVABLE FIXED A SHELL 1. THE BASE PLATE SHOWS UP A STEAM PASSAGE 7 WHICH COMMUNICATES THROUGH A PORT 23 WITH CHAMBER 3. AT THE BOTTOM, THE PLATE PRESENTS A CONDENSATE ORIFICE 8 WHICH COMMUNICATES THROUGH TWO PASSAGES 14, 17 WITH THE CHAMBER THROUGH A SHUTTER SEAT 9 AND A SHUTTER 11 WITH THE CHAMBER, AND WITH A THERMOSTATIC VALVE 19. THE SHUTTER IS ATTACHED TO ONE END OF ONE LEVER 12 CARRYING A FLOAT 4 AT ITS OTHER END. THE LEVER SWIVELS AROUND THE PIVOT 13. THE CONDENSATE ENTERS THROUGH PORT 7 AND PASSAGE 23 IN CHAMBER 3. WHEN THE QUANTITY OF CONDENSATE INCREASES THE FLOAT 4 RAISES AND RIVES THE LEVER 12 AROUND PIVOT 13. SHUTTER 11 RELEASES THE SEAT ELEMENT 9. THE CONDENSATE IS DRAINED FROM THE BEDROOM THROUGH PASSAGES 10 AND 14.

Description

The invention relates to a steam trap.

  The apparatus is particularly useful for the installation of

  vertically in line and practically works

without loss of steam.

  Steam traps have been used for

  years by the chemical industry and the petroleum industry.

  Many of the existing traps operate with some

  For years, the industry has not considered a disadvantage of the loss of G, 9 to 2.3 kg per hour and per purger. However, as the cost of energy has increased, has become important

  to save in any way we can

  steam traps that are easy to install

  cheap and that work with little or no

loss of steam.

  The invention relates to a steam trap of reduced weight particularly suitable for vertical installations in line The trap comprises a two-piece envelope formed of a vertical base and a shell

  thin walls that together define a room, the

  presenting an upper steam orifice and a lower condensate orifice which communicate respectively with steam and condensate pipes, a passage from

  the upper steam orifice, passing through the base and

  in the rooms, the passageway being initially

  cal and becoming almost horizontal before

  expensive in the chamber, a valve seat member provided within the chamber and attached to an opening of the base which leads to a second passage communicating with

  the lower condensate orifice, a float placed in the

  of the chamber and attached to one end of a lever arm at the other end of which is fixed a shutter which, when applied to the seat element, closes

  the opening between the chamber and the passage, the arm of the-

  being mounted pivotally in the chamber such that when the float ascends vertically due to the condensate, the shutter disengages from the seat member and the passage opens, the passage of the base also ensuring the communication between the lower condensate orifice and terminating vertically at an opening provided in the chamber At a level higher than the normal condensate level, opening on which is fixed a

thermostatic valve.

  The steam trap of the invention has many

many advantages.

  In its normal operation, practically no live steam is lost. This can provide a significant saving in energy compared to many of the traps currently in use, which waste 0.9 to 2.3 kg / h.

  The trap has a characteristic empa-

  If for any reason the float valve does not work, that is to say if it is obstructed by impurities, the condensate rises and activates the thermostatic valve so that it releases itself from the valve. room This fun can continue until

  what you open the trap and clean it.

  The trap is especially designed for vertical in-line installations Most older steam traps have side connections

  In the installation of these pur-

  more elbows and pipes are needed.

  ros. Known steam traps, float and

  thermostats are typically housed in chambers

  These cast iron assemblies are heavy and

  combrants and we do not run them in small

  on the other hand, for reasons

  6 security sounds, some companies do not allow

  the use of cast iron for superheated steam pressures

  less than 0.86 A Pa However, in the case of the trap

  of the invention, it is not necessary that the whole

  loppe is constructed of cast iron, that is to say that

  Thin-walled keel can be made of stainless steel

  This means that the trap will weigh significantly

  less and will be much easier to manufacture.

  The trap can be easily removed for

  repair, that is to say, it is sufficient to remove the co-

  keel and that the entire interior of the trap is then

  for repair and cleaning, the base and the

  yauterie remaining in their service position.

  Other advantages of the trap will appear in

the description below.

  The figure is a sectional side view of a

  mode of execution of the steam trap according to the invention.

  We will now describe the invention about

the figure.

  The envelope of the trap is composed of a shell

  the thin-walled cylindrical 1 and a vertical base plate 2 The inside of the envelope forms the chamber

  This structure allows access to the chan-

  to install the various interior elements as well

  only for cleaning and maintenance.

  The envelope may be made of various metals, for example the thin-walled shell may be steel

  or stainless steel This feature allows to

  to build a part of the envelope by means of

  "Thin-walled" means that the thickness

  wall only needs to be sufficient to support the

  the vapor pressures that will be encountered in service

  vice For example, for operation at pressures

  from 071 to 1 M Pa, the wall can have a thick

  1.5 mm at relative pressures up to 1.7 M Pa, the wall thickness can be 1.8 mm The base 2 can be formed by forging and drilling It could

also 8 be formed by molding -

  The two parts of the envelope are fixed in

  they are removable, which ensures easy assembly and disassembly and thus safety, the shell 1 can be fixed to the base 2 by a locking ring 5 which is bolted in place (not shown) A seal 6 seals to prevent the vapor from

run out of the room.

  The top of the base has a larger hole

  The orifice is a vapor inlet 7 which will be connected to a steam pipe (not shown). This orifice constitutes a steam and condensate inlet in the bleed chamber 5 through the passage L 3. The passage is initially vertical and passes horizontally for end with an opening

  leading to the chamber so that the steam changes

  The effect of entering the Uela chamber is to divert steam and condensate into the chamber and prevent the steam and condensate from striking.

  directly the internal organs.

  N bottom of the vertical base 2 is an original

  condensate 8 This is a model

  yen of condensate evacuation contained in the trap,

  condensate pipe (not shown) to a collection

  condensate or to the atmosphere and communicate with

the room by the passage 14.

  To easily ensure the vertical installation

  the in-line, the upper steam orifice and the orifice

  Bottom condensate are aligned vertically.

  The passage 14 communicates with an opening in the bottom of the chamber and in this opening is fixed a seat member 9 In the figure, the element 9 is screwed into the opening of the base The seat member 9 presents

  a passage 10 which communicates with the passage 14.

  A shutter 11 applies to the eleventh

  The shutter is mounted on one end of a lever arm 1 G This lever arm is pivotally mounted within the housing.

  the chamber by a pivot 13 and a support 15

  of execution, the Divot support 15 is mounted on the seat member 9 for assembly convenience.

  the other end of the lever arm 12 is:

4.

  In operation, the condensate enters the chamber

  3 through the upper port 7 and the passage 23 and collects

  at the bottom of the chamber As the amount of

  condensate increased it raises the float 4 A me-

  As the float rises, it pivots the lever arm 12 about the pivot 13. As a result, the shutter 11 is disengaged from the seat element 9. The condensate then flows from the chamber through the passages 10 and 14. condensate level goes down, the float goes down and

  brings the shutter 11 & apply to the element

  The rotation of the float is chosen such that the valve opens and closes while the passage 10 of the seat member 9 remains below the condensate level. , virtually no steam is lost

  in the atmosphere through passages 10 and 14 and it is

  gives a nearly continuous flow of condensate.

  Since the shutter 11 and the seat 9

  are located above the bottom of the chamber, the valve

  less than being obstructed by impurities etc. All

  impurities from the condensate collect at the bottom of the cha-

  and can be removed when disassembling the trap

by removing the shell 1.

  Inside the base, passage 14 is

  also rears upwardly through the base 2, from the lower condensate orifice 8 to an opening leading to the

  rooms at a height above the normal level of

  density in the chamber when the trap is working properly

  This passage communicates with a passage 17 of a thermostatic valve seat 22 provided in a plug 18

mounted in the opening of the base.

  If desired, the passage 14 may have a constriction 16 near the opening leading to the valve

  This can be useful in case of failure

  thrust of the thermostatic valve, the tightening, by

  2.8 mm in diameter, would reduce the loss of

  fear of chamber 3 while keeping a sufficient diameter to allow non-condensable raz to escape from

  the chamber Or again, the passage 17 of the plug 18 to-

  should have the diameter to play this r 8 le.

  On the plug 18 is mounted, by any appropriate means, a thermostatic valve 19 Oelle-ci is

  conventional and uses a bellows 20 to move an object

  turner 21 and put it in contact with the seat 22 and

to remove it.

  Under normal operating conditions, the bellows remain dilated and the valve closed. When air or other non-condensable gases enter the chamber 3, they remain above the condensate and if they are not removed they the condensate to get to the room and get out of it as these gases are colder than steam, they cause a contraction of the

  bellows 20, further away from the shutter 21 of the seat 22.

  The gas then passes through the passages 17 and 14 and evades

  drain through the condensate port 8 Dana the function

  Usually, this flow is free of oondensate.

  The thermostatic valve is also a mechanism

  If for some reason,

  the float mechanism does not open the valve

  In passage 10, the condensate continues to rise when

  he touches the bellows, he causes a contraction of that

  and the condensate is discharged through the passae.

Z'LV YDIGLTIONS

  1 Steam trap for reduced weight

  vertical structure, characterized by the fact that

  takes a vertical base plate (L) to which is

  releasably removing a thin-walled shell (1), the

  plate and the shell defining a chamber (3), the

  than basic having in the top a steam port A

  (7) which communicates with a pipe & steam and (as

  a passage (23) leading to an opening at the top of the chamber and changing direction so that it is

  practically horizontal when it ends at the opening

  re, the base plate having in the bottom an orifice

  and condensate (8) vertically aligned with the vacuum orifice

  fear and who communicates with a condensate pipe, the

  that being pierced by a second passage leading to a second

  opening (14) at the bottom of the chain and at a third

  like opening (17) leading to the chamber near the top and above the normal condensate level, a seat member (9) being attached to the second opening inside the chamber, a float (4) being attached inside the chamber (1) & one end of a lever arm (12)

  which at its other end has a shutter (11)

  pleating a passage of the seat member (9), the lever arm being pivotally mounted within the

  the chamber so that when the float rises vertically

  due to the condensate, the shutter disengages from the passage of the seat element, a thermostatic valve

  (19) being ad Joined at the third opening (17) which leads to

do not to the room.

  c 2 steam trap according to claim 1, characterized in that the lever arm is connected

  pivotally to the seat member.