US3858860A

US3858860A - Pipe quench head

Info

Publication number: US3858860A
Application number: US414159A
Authority: US
Inventors: George W Randall
Original assignee: Armco Inc
Current assignee: National Oilwell Varco LP
Priority date: 1972-03-02
Filing date: 1973-11-08
Publication date: 1975-01-07
Anticipated expiration: 1992-01-07

Abstract

The pipe quench head comprises an outer shell mounted on a frame and an inner shell mounted in the outer shell and the two are removably fastened together by suitable fastening means. There will be a plurality of inner shells to suit a particular material size or range of sizes. Each such inner shell is a spool-like element having front and back end plates to seal with mating areas on the outer shell to form a closed end annulus between the outer shell, the inner shell and its end plates. Each inner shell has drilled holes radially around the circumference and laterally in its length to accept spray nozzles mounted radially on the inside surface. A pipe connection on the outer shell connects to a suitable pumping system, the space between the inner and outer shells thereby comprising a supply plenum to receive a continuous supply of water or other coolant.

Description

[ 1 .lan.7,1975

[ PIPE QUENCH HEAD [75] Inventor: George W. Randall, Coraopolis, Pa.

[73] Assignee: Armco Steel Corporation, Butler County, Ohio [22] Filed: Nov. 8, 1973 [21] Appl. No.: 414,159

Related U.S. Application Data [63] Continuation of Ser. No. 231,155, March 2, 1972.

Bard et al. 148/156 Hollyer 266/6 5 Primary Examiner-Gerald A. Dost Attorney, Agent, or Firm-Melville, Strasser, Foster & Hoffman [57] ABSTRACT The pipe quench head comprises an outer shell mounted on a frame and an inner shell mounted in the outer shell and the two are removably fastened together by suitable fastening means. There will be a plurality of inner shells to suit a particular material size or range of sizes. Each such inner shell is a spoollike element having from and back end plates to seal with mating areas on the outer shell to form a closed end annulus between the outer shell, the inner shell and its end plates. Each inner shell has drilled holes radially around the circumference and laterally in its length to accept spray nozzles mounted radially on the inside surface. A pipe connection on the outer shell connects to a suitable pumping system, the space between the inner and outer shells thereby comprising a supply plenum to receive a continuous supply of water or other coolant.

11 Claims, 6 Drawing; Figures PATENTEU JAN 7 SHEET 1 BF 2 1 PIPE QUENCH HEAD CROSS REFERENCE TO RELATED APPLICATION This application is a continuation application of application Ser. No. 231,155 in the name of the same inventor filed Mar. 2, 1972, and now abandoned and entitled PIPE QUENCH HEAD.

BACKGROUND OF THE INVENTION 1. Field of the Invention The quench head and system of this invention is particularly well suited for quenching pipe, bars or other like material requiring heat treating. Specifically, for example, the quench head may be used to quench seamless pipe rapidly as it comes out of heat treating apparatus. Such quenching must be fast so as to bring the pipe from its austenitic condition (stable at high temperatures) to its martensitic condition without substantial transformation to upper transformation products such as pearlite. It must also be uniform around the pipe circumference to avoid distortion.

2. Description of the Prior Art Although no search of the prior United States patent art has been made, some of the heretofore common quench head systems are known. These have been comprised, for example, of spray nozzles mounted on a series of parallel pipe headers arranged circumferentially around the material to be quenched, or they have been comprised-of pipe spray nozzles mounted radially around a series of circular pipe headers stacked in line laterally along the line of material to be quenched. Conventionally the spray nozzles have been threaded into a threaded header. These prior installations have been relatively inflexible.

An object achieved by this invention is the ability to maintain close proximity between the spray nozzle and the material, for better quenching. Another object achieved by this invention is the ability to clean and maintain the quench head, a factor which is not possible on conventional means of prior quench heads. A quench head of this invention provides equal distribution of the quenching solution to all spray nozzles. It provides access from both sides of the spray nozzle for easy cleaning. The invention provides complete access to the inside of the spray quench system for cleaning and other maintenance by providing a multitude of interchangeable inner shells, and close proximity of the spray nozzles to the material being quenched is permitted with a minimum number of major quench head parts.

SUMMARY OF THE INVENTION Each quench head constructed according to this invention is comprised of an outer shell which, although of a given diameter, is preferably adjustable so that it may be centered about the material passing therethrough, and any one of a plurality of inner shells which, while constructed alike, have various inside diameters to accommodate different sized materials. The spray nozzles are located about the periphery of the inner shell which in itself is a spool-like element comprised of a centrally located conduit having a pair of flanges affixed thereto, one at either end. Although the diameter of the conduit in which the nozzles are located may vary in accordance with the material to be treated, the end flanges for all of these inner shells will be of the same outer diameter and configuration so that they will cooperate with corresponding parts of the outer shell. Suitable sealing means are provided between these cooperating inner and outer shell parts so that the space between the outside of the inner shell conduit and the interior of the outer wall of the outer shell constitutes a supply plenum into which the coolant will be pumped. The inner and outer shells are releasably fastened together so that one inner shell may quickly be replaced by another when a change in the size of the material being treated occurs. By adjusting the'outer shell with respect to the center line of the material being treated as it moves in a given direction, and by selecting the appropriate inner shell for that particular material, complete flexibility is imparted to the quench head with a minimum number of major quench head parts. Means such as porter bar are also provided by which the inner shell may readily be removed from which the outer shell when the releasable means are properly actuated. When an inner shell is so removed the entire exterior of the inner shell conduit is exposed whereby the nozzles may readily be cleaned or otherwise attended to. The nozzles have means extending interiorly of the shell conduit to properly direct the flow of coolant. Preferably guard means are affixed to the interior wall of the shell conduit to protect the nozzle means against possible damage should the material move out of its normal path of travel through the quench heads.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is atop plan view ofa quench head system according to this invention in which two quench heads embodying the teachings of this invention are employed.

FIG. 2 is a front elevation of the apparatus shown in FIG. 1.

FIG. 3 is an end view of the apparatus shown in FIGS. 1 and 2 but with certain parts removed. FIG. 4 is a frag mentary sectional view, broken along its length, taken along the line 4-4 of' FIG. 3.

FIG. 5 is a sectional view of the: outer shell constituting a part of the quench head of this invention.

FIG. 6 is a sectional view of the inner shell constituting a part of the quench head of this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 illustrate a quench head system comprised ofa pair of the individual quench heads to be described in greater particularity in the consideration of FIGS. 4 through 6. Each quench head is generally indicated at 10. Each quench head 10 is comprised of an outer shell lll located between a pair of flanges l2. Portions of the flanges 12 extend beyond the exterior of the outer shell II as indicated at 12a and are engaged within a pair of angle members 13 by which the quench head is supported. These frame members 113 are mounted on suitable jacks generally indicated at M and it will be understood by those skilled in that art that, by these jacks 14, the frame members 13 and quench head parts carried thereby may be moved vertically upwards Or downwards as desired. In these FIGS. 1 and 2 means are generally indicated at 15 in dotted lines for moving the material to be quenched through the apparatus in the direction of the arrows seen in those FIGS. A carrying member 16 having loops 17 :may also engage the flange portions 12a to aid in adjusting the vertical position of the quench head or for changing its location in moving it from place to place. An additional quench

head support flange

18, 18a may also be employed. In some instances it may also be desirable to employ a front plate 19 and hood 20 at the entrance end of the quench head 10.

Coolant may be pumped into the quench head by means of a suitable pump (not shown) through a conduit 21 into a manifold 22 from which it may enter the quench head or heads via the conduit 23. The conduit 23 extends through the wall of the outer shell 11, see also FIG. 5.

Referring now to FIGS. 4 and 6 the inner shell or spool-like element generally indicated at 24 will be described. An inner shell 24 is comprised of a tubular conduit 25 having

flanges

26 and 27 fastened to its respective ends. In the preferred form of the invention the outer dimensions of the

flanges

26 and 27 will be the same regardless of the diameter of the particular tubular conduit 25 engaged between them. The diameter of the flange 27 will be of such a size that it may pass through the opening 28 in the flange 12 at the right hand end, or entrance end, of the outer shell 11 as viewed in FIG. 5. This flange 27, however, will engage the flange 12 located at the exit end of the outer shell 11. The flange 26, however, is of such a size that it may engage the front portions of the

flange

12, 12a located at the right hand side of the head as viewed in FIG. 5.

As best seen in FIGS. 3, 4 and 6 the inner shell conduit 25 has a plurality of drilled holes 28 spaced radially around its circumference and laterally throughout its length to accept spray nozzles 29 mounted radially on the inside surface. These nozzle members 29 may be bolted in place by members 30 having orifices therethrough by means of which coolant inpinges on the nozzle members 29. These members 29 are flat-like so as to spread the coolant as it passes through the members 30 and holes 28 towards the material being quenched. A plurality of protective devices 31 protrude from the interior of the conduit 25 and are spaced among the nozzle members 29 as to protect them from damage should the material passing through the interior of the conduit 25 for some reason get out of line.

It will be understood that all connections between the outer shell 11 and its flanges 12, and between the inner shell conduit 25 and its

flanges

26 and 27, will be water tight as indicated by the weld marks and the like shown in these FIGS. This is also true of the member 32 fastened within the left hand side of the outer shell member 11 as viewed in FIG. 5.

It is also imperative that there be water tight relationships established between the

flanges

12 and 27 and between the

flanges

12 and 26 when the inner shell 24 is located within the outer shell 11. As noted in FIGS. 4, and 6, one way of achieving this is to provide a groove 33 in the flange 27 to carry a suitable gasket 34. Similarly the right hand flange 12 (as seen in FIG. 5) is provided with a groove 35 to receive a suitable gasket 36. These gaskets, for example, as will be understood by those skilled in the art, may comprise O-rings or rings which have a U-shape in a cross section. In any event they are so sized as to be compressed when the inner shell is locked within the outer shell.

The locking arrangement may be accomplished in any suitable fashion, that illustrated in these FIGS. being a series of toggle bolts 37 (see FIG. 4) pivotally mounted on rods 38 fixed between plates 39 secured between the

flanges

18a and 12a,

slots

40 and 41 being provided in the flanges l2 and 26 respectively. As shown in FIG. 4, when the nut 42 is tightened with the toggle bolt 37and inner shell 24 and outer shell ll being in the position illustrated, the gasket 34 is pulled against the flange 12 while the flange 26 is pulled against the gasket 36. In order to remove the inner shell from the outer shell it is necessary only to loosen the nut 42 so that the bolt 37 may be rotated counterclockwise as viewed in FIG. 4 until such time as the flange 26 may be pulled free.

When in the tightened position illustrated in FIG. 4 it will be apparent that there is a plenum chamber defined by the interior surface 11a of the outer shell 11 and the exterior surface 25a of the inner shell conduit 25 and the cooperating flanges 26 l2 and 27 12. This plenum chamber is generally indicated at 43.

As best seen in FIGS. 3, 4 and 6 the inner shell 24 is provided with means by which it may readily be inserted and withdrawn into and out of the outer shell 11. Such means comprises a tube-like member 44 extending between the

flanges

26 and 27. This member 44 will receive a porter bar of the type shown in phantom as indicated at 45. The member 44 extends within the plenum chamber 43. Preferably, however, there is only one of these members 44 and it does not unduly interrupt the capacity of the plenum chamber 43. In some instances, particularly wherein the diameter of the

inner shell conduit

24, 25 is relatively small, as a result of which there will be more of the

flange portions

26 and 27 extending beyond the outside of the

shell member

24, 25, it may be desirable to provide reinforcing spacers 46 between

such flanges

26 and 27 and this is shown in FIG. 6. It will be understood that a plurality of these members 46 may be located radially around the exterior of the

shell

24, 25.

SUMMARY The quench head comprises an outer shell 11 which will be used for all of the material to be quenched, regardless of its size. This quench head outer shell, however, is supported on frame work which is adjustable vertically to enable it to be centered about the particular material moving through the quench head by means of the roller means and the like 15 which are fixed in position. The inner, spool-like shell 24 will vary in size according to the size of the material being quenched. Thus, when small diameter material is being quenched, a spool having a conduit 25 of small size will be utilized and when material of larger diameter is being quenched a conduit 25 of larger diameter will be utilized in the spool-like, inner shell 24. The diameters of the

flanges

26 and 27, however, of the inner shell 24 will remain constant so that they will mate properly with the

flanges

12, 12a of the outer shell 11. In those instances, however, wherein a relatively small conduit 25 is em ployed, brace members 46 may be located between the

flanges

26 and 27 so as to make the spool-like, inner shell 24 rigid.

Although the invention has been described primarily in connection with the quenching of pipe, it will be understood that the apparatus may be used in connection with other materials; it does have particular utility, however, for treating cylindrical materials of more or less constant diameter. Each of the spool-like, inner shells 24 will handle a range of different diameter materials. When a change of range of diameters in the material being quenched is effected, it is necessary only to pull out the spool-like, inner shell 24 used for a given range and replace it with another member 24 to accommodate the new range being sent through the apparatus. When this is done the outer shell 11 is adjusted vertically so that it and the new inner shell will be located around the center line of the material to be treated. It will be readily apparent that this arrangement also makes it easy to clean the nozzle arrangement 28 30 since, when the inner shell 24 is pulled out from the outer shell 11 (in the arrangement shown this is accomplished by the porter bar 45 being inserted within the tubular member 44 and then withdrawn with the shell 24 thus supported thereon, the toggle bolts or other connecting means having first been loosened), such nozzle means are completely exposed for cleaning from either without or within the conduit of the spoollike, inner shell 24. This ease of cleanability is an important part of this invention.

In pipe quenching operations like those previously referred to it is not uncommon to supply water to the manifold 22, and from there into the plenum chamber 43 via the conduits 23, at the rate of 3,000 gal. per minute. This water may be recirculated and cooled and the temperature can also be varied to adjust the rate of quench. In these operations pipe may be passed through a quench head at the rate of 12 to 150 feet per minute and usually this rate of travel will be the primary means by which the overall quench rate is adjusted. When a smaller size inner shell 24 is utilized it will have a fewer number of nozzles so that somewhat less water is actually used although the water pressure may remain the same. This feature of being able easily to switch from one size shell 24 to another is a distinct improvement over prior apparatus which required a complete replacement of the quench head when the size of material passing through the apparatus was changed.

Again with reference to the quenching of pipe it will be noted that the diameter of the inner shell conduit 25 is designed to provide a fixed distance between the spray nozzles 28 30 and the work to be quenched. The shells 24 will be designed for a pipe size range as, for example, one shell would accommodate pipe sizes 5 A inches OD. through 7 inches OD. The maximum size would provide a minimum distance between the spray nozzles 28 30 and the pipe and the minimum pipe size would be regulated by the maximum distance practical'between the spray nozzles 28 30 and the pipe diameter.

FIGS. 4 through 6 show the basic construction of an individual quench head. FIGS. 1 and 2 illustrate a system in which a pair of these heads may be employed. It is to be understood that the number of heads utilized depends on the quenching job to be performed. In some instances a single head may be sufficient. At other times it may be desirable to employ two, three or even more.

It will be apparent to those skilled in the art that modifications may be made in the structure shown and described without departing from the scope and spirit of the invention. Thus, for example, although the gasket arrangement utilized for effecting a fluid tight engagement between a selected inner shell 24 with the outer shell 111 has been illustrated as locating one gasket means 34 on the flange 27 and another gasket means 36 on the flange 12, it would be possible to reverse this arrangement or even to adopt some other. The toggle bolts 37 could be replaced by some other kind of clamping arrangement. All that is needed is some kind of quick release means by which the

shells

24 and 11 may be pulled into fluid tight contact with one another via the gasket system selected. Thus, while the invention has been described in terms of particular structures and arrangements, these structures and arrangements are not to be considered a limitation on the invention except insofar as they are specifically set forth in the subjoined claims.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

I. A quench head comprising: an outer shell (10) having a cylindrical housing (If) and a pair of flanges (I2) extending at least inwardly of the periphery of said housing, a first of said flanges being located at one end of said housing and a second of said flanges being located at the other end of said housing, that portion of said first flange which extends inwardly of said housing forming a first abutment means and having a centrally located first opening therein, that portion of said second flange which extends inwardly of said housing forming at least a part of a second] abutment means and having a centrally located second opening therein, said second opening being larger than said first opening; and a plurality of interchangeable inner shells (24), each of said inner shells having a cylindrical housing conduit (25) and a pair of flanges (26, 27) extending outwardly from the periphery of said conduit, a first (27) of said conduit flanges being located at one end of said conduit and being of such size as to be able to pass through said second opening and abut said first abutment means, the second (26) of said conduit flanges being located at the other end of said conduit and being of such size as to abut said second abutment means when said first conduit flange abuts said first abutment means, said conduit having a plurality of nozzle means (28 30) extending therethrough and projecting inwardly thereof, said cylindrical housing conduits different from each other only in diameter and the outer diameters of said first and second conduit flanges of all of said cylindrical housing conduits being the same; first gasket means (34) between said first conduit flange and said first abutment means, and second gas-- ket means (36) between said second conduit flange and said second abutment means, there being a plenum chamber (43) defined by the outer wall of said conduit, the inner wall of said outer shell, and said conduit flanges and said abutment means; clamp means (37, 42) for releasably clamping said inner, spool-like shell to said outer shell; and entrance means (23) for admitting a supply of coolant to said plenum chamber; said conduit extending between said first and said second openings; whereby an inner shell may be selected from said plurality of interchangeable inner shells in accordance with the diameter size of the cylindrical housing conduit desired.

2. The quench head of claim 1 in which said nozzle means are located both circumferentially about said conduit and laterally thereof.

3. The quench head of claim 1 in which said nozzle means includes a member (29) which is relatively blade-like in configuration whereby to spread the coolant as it passes interiorly of the conduit from the plenum chamber.

4. The quench head of claim 1 including brace means extending between said first and said second conduit flanges.

5. The quench head of claim 1 in which said inner, spool-like shell includes means (44) to receive a porter bar and the like for moving said inner, spool-like shell to and from said outer shall.

6. The quench head of claim 1 which said clamp means are located about the periphery of said second outer shell flange so as to clamp said second conduit flange to said second abutment means when said first conduit flange abuts said first abutment means.

7. The quench head of claim 1 including guard means (31) extending inwardly from the inner wall of said conduit.

8. A quench head system including at least one said quench head according to claim 1 and means for moving material to be quenched along a path of travel centrally of said conduit, and including coolant moving means (21) for introducing coolant into said entrance means.

9. The system of claim 8 including means (14) for centering said outer shell about said path of travel.

10. The system of claim 8 including a plurality of the said quench heads according to claim 1, means for moving material to be quenched along a path of travel, said path of travel passing through all of the said conduits of the said quench heads, and means for centering all of the said outer shells of the said quench heads about said path of travel.

11. The system of claim 10 including a manifold (22) between said coolant moving means and each of the said entrance means which admits coolant to its respective said plenum chamber of each of the said quench heads.

Claims

1. A quench head comprising: an outer shell (10) having a cylindrical housing (11) and a pair of flanges (12) extending at least inwardly of the periphery of said housing, a first of said flanges being located at one end of said housing and a second of said flanges being located at the other end of said housing, that portion of said first flange which extends inwardly of said housing forming a first abutment means and having a centrally located first opening therein, that portion of said second flange which extends inwardly of said housing forming at least a part of a second abutment meAns and having a centrally located second opening therein, said second opening being larger than said first opening; and a plurality of interchangeable inner shells (24), each of said inner shells having a cylindrical housing conduit (25) and a pair of flanges (26, 27) extending outwardly from the periphery of said conduit, a first (27) of said conduit flanges being located at one end of said conduit and being of such size as to be able to pass through said second opening and abut said first abutment means, the second (26) of said conduit flanges being located at the other end of said conduit and being of such size as to abut said second abutment means when said first conduit flange abuts said first abutment means, said conduit having a plurality of nozzle means (28 - 30) extending therethrough and projecting inwardly thereof, said cylindrical housing conduits different from each other only in diameter and the outer diameters of said first and second conduit flanges of all of said cylindrical housing conduits being the same; first gasket means (34) between said first conduit flange and said first abutment means, and second gasket means (36) between said second conduit flange and said second abutment means, there being a plenum chamber (43) defined by the outer wall of said conduit, the inner wall of said outer shell, and said conduit flanges and said abutment means; clamp means (37, 42) for releasably clamping said inner, spool-like shell to said outer shell; and entrance means (23) for admitting a supply of coolant to said plenum chamber; said conduit extending between said first and said second openings; whereby an inner shell may be selected from said plurality of interchangeable inner shells in accordance with the diameter size of the cylindrical housing conduit desired.

8. A quench head system including at least one said quench head according to claim 1 and means (15) for moving material to be quenched along a path of travel centrally of said conduit, and including coolant moving means (21) for introducing coolant into said entrance means.