US1657739A - Valve - Google Patents

Description

J. O. CARREY VALVE Filed Julyll. 1924 3 Sheets-Sheet 2 4 I a 3 m/dwmg g .Ziweizw" daiziz 017a)? mun; W

Jan. 31, 1928.

J. o. CARREY VALVE Filed July 11. 1924 3 Sheets-Sheet 5 fiaeiziar da/m/ 0. Gal??? Patented Jan. 31, 1928.

UNITED STATES PATENT OFFICE. 1 1

JOHN D. CARREY, OF ST. LOUI$, MISSOURI, ASSIGNOB TO CARREY-MORSE ENGINEER- ING COMPANY; OF ST. LOUIS, MIEJSQURI, A. CORPORATION" OF MISSOURI.

VALVE.

Application filed July 11, 1924. Serial No. 725,413.

This invention relates generally to valves and more particularly to multiple control valves wherein a plurality. of fluid circuits are simultaneously controlled by the operation of the valve.

The objects of the invention are to provide a valve which can be automatically operated to open and close the ports of the respective pipe circuits so that certain of said circuits when closed are maintained at the operative pressure while certain other circuit or circuits are exhausted or by-passed so as to relieve such circuit or circuits of the operating pressure.

Further objects of the invention are to provide a valve for controlling the fluid circuits of, a refrigerating apparatus whereby when said apparatus is inactive certain of said fluid circuits and mechanism associated therewith are held under operating pressure while certain other circuit or circuits are bypassed in orderto relieve the pressure on the compressing or other mechanism.

Still further objects of the invention are to provide simple and eflicient means for operating said valve and to provide suitable means, preferably electrically operated, for controlling said valve actuating means.

, With these and other objects in view my invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in whicha Figure 1 is a diagrammatic view of the refrigerating apparatus and its connections and showing the arrangement of the valve in relation to said connections.

Figure 2 is a vertical cross section through the valve and showing the housing oftlie operating mechanism partly broken away.

Figure 3 is a horizontal cross section taken on line 33 of Figure 2.

Figure 4 is a vertical section taken on line 4L-4t of Figure 3.

Figure 5 is a vertical cross section taken on line 5-5 of Figure 3.

Figure 6 is a view similar to Figure Land showing the valve moved to open position.

Figure 7 is a perspective detail view'of the valve shown in Figures 4 and 6.

Figure 8 is a perspective detail view of the valve shown in Figure 5.

Figure 9 is a view looking toward the upper end of the casing containing the, 210- tuat-ing mechanism.

Figure 10 is a detail view showing the operative connectionbetwcen the rock arm and one of the armatures.

Figure 11 is a vertical cross section taken on line 11-11 of Figure 9. V Figure 12 is a horizontal cross section through the lower part of one of the valve stems and showing the by-pass passage formed therein. Figured?) is a similar cross section through the lower part of the other valve stem, which is formed without the by-pass connect-ion.

Referring by numerals to the accompanying drawings, 10 indicates a compressing element of a refrigerating apparatus, said element being of any desired design and having high pressure outlet pipes 11. 12designates a condensing element or coil of "the refrigerating apparatus and 1 1 is a cooling element or expansion coil. 15 is a valve casmg and 16 isthe casing of the valveactuating mechanism.

The high pressure pipes ll are connected by a pipe 17 to a high pressure inlet port- 18 of casing 15 which port communicates with an outlet port 19 to which is connected, by a pipe connection 20, one end of condensing element 12. The refrigerant .in passing through this condenseris condensed and is conveyed in a liquid state by apipe 21 to an inlet'port 22 of casing 15 from which it is then conducted by means of an outlet port 24 and a pipe connection 25 to the cooling coil or element 14 where said refrigerant is allowed to expand and thereby cool the compartment in which it is located. The

opposite end of this cooling element is conn-ected by a pipe 26 to an inlet port 27in valve casing 15 from which it is then led through an outlet port 28 and a pipe connection 29 to branch pipes 30 which communicate with the intake ports of the compressing element- 10. Thus the refrigerant is circulated and recirculated through the different elements of the refrigerating apparatus and the intercommunication between said elements is controlled by valve 15.

In the operation of refrigerating systems, i

it is desirable that certain circuits, when the apparatus isinactive, be maintained under the operating pressure, thereby eliminating waste of energy necessary to build up the pressure a ainin the circuits where they are left open and the pressure built up therein is allowed to be dissipated. At the same time, the controlof the circuits independently of each other and of the compressing element increases the efficiency and responsiveness of the refrigerating apparatus to the demands made upon it. It is also desirable to drain or by-pass certain circuit or circuits so as to relieve the compressing unit or element from pressure when starting said element, thereby facilitating the operation thereof, eliminating noises, and effecting saving in pov vei' consumed in driving said compressing llqlllflu To this purpose, valve casing 1s provided with suitable valves operable to open and close the communication between the respective ports at the appropriate time, said valves being operable by a mechanism controlled in any suitable manner.

Casing 15 is preferably of a cylindrical shape and is provided at its lower end with an external thread 31 for receiving the threaded annular flange 32of a cover 34. An inwardly disposed annular shoulder 34 forms a stop for casing 15 and limits the extent thereof into the cover 34, whereby a chamber 35 is formed in the cover for the reception of a disk 36. Cover 34 has a threaded boss or extension 34 which is screw-seated in one of the end walls of the casing 16 in which the actuating mechanism hereinafter more fully described is located.

' A rock shaft 37 is journaled in the threaded extension 34 and extends upwardly into chamber 34 and its upper end has fixed thereto a screw 38 which operates in a threaded recess 39 axially ar angcd in casing 15. Disk 36 is loosely mounted on shaft-37 and is held in position thereon by the lower end of screw 38 and a collar 40 which latter is pinned to. shaft 37, as shown in Figure 2. The rocking motion of shaft 37 causes screw 38, by virtue of its engagement with the threaded recess 39, to move in an axial direction, thereby moving disk 36 toward or away from the lower end of casing 15 depending on the direction in which the shaft 37 is rocked. v

Casing 15 is provided with three longitudinally disposed bores 41, 42 and 44, respectively. These bores are preferably equally spaced about the alvis of casing and bores 41 and 42 are substantially of the same diameter while bore 44 is of smaller diameter than the before-mentioned bores. Bore 41 has its upper end terminating in theoutlet port 19 while inlet port 18 which is formed in the side wall of casing 15 exteiids transversclv thereinto and connnunicate's with the central or intern'iediate portion of bore 41. This intermediate portionis reduced in dianieter as indicated at 41 and the upper end of said intermediate p01 tion terniinates in a valve seat 45 adapted to receive a valve head 46 of a valve 47. The lower end of portion 41 terminates in a valve seat 48 which is adapted to receive a valve head 49 carried by the lower end of valve 47. The lower end of valve head 49 extends beyond the lower end of casing 15 and is provided with an annular groove adapted to receive the slotted portion 36 of disk36 whereby the movement of disk 36 actuates valve 47. The stem 47" of valve 47 is of slightly smaller diameter than the diameter of intern'iediate portion 41 in order when the valve head 46 is unseated, to alllow the refrigerant to pass from port 18 through said portion 41 to port 19.

A valve 50 is arranged in bore 42 and controls the communication between ports 27 and 28. The construction and operation of valve 50 is identical with the construction and operation of valve 47 and therefore will not be described in detail.

Bore 44 establishes communication between the inlet port 22 and the outlet port 24 and is provided in its upper end with a valve seat 51 adapted to receive valve head 52 of a valve 54, the stem of which extends through the intermediate portion 4 and is provided at its lower end, which extends beyond the lower end of casing 15, with a grooved collar 54 adapted to he engaged by the slotted portion 36" of disk 36.

The lower end of bore 44 is provided with a suitable packing 55 and said end is closed by a gland 56 which is sci'mv-seatcd therein. The stem of valve 54 operates through said gland and packing 55. Thus it will be seen that when shaft 37 is rocked in the proper direction the screw 38 through its intercugagen'lent with the threaded recess 39 causes said shaft and disk 36 to move upwardly, thereby unseating valve heads on 47, 50 and 54 in bores 41, 42 and 44 respectively and establishing comnlunication between the respcctive ports so that the refrigerant can circulate through the refrigcratin; system. When shaft 31' rotated in opposite direction this disk 36 is caused to move away from casing 15 thereby seating all of the last mentioned valves and closing communications between the respective ports. lVhcn valve 46 which controls the communication between ports 18 and 19 seated, valve 49 is unseated, thereby permitting the refrigerant fluid contained in pipe 17 and branch pipes 11 to drain or by-pass through a groove 49 longitudinally disposed in the periphery of valve 49 into chan'lber 35. From chamber 35 the refrigerant can be returned to the compressor either directly by a pipe connection or it can be allowed to pass through the bearing in extension 34 into casing 16 then pass therefrom info the compressor 10. liijhis manner while the refrigerant contained, in coils l2 and 14 is trapped therein and held under pressure, the refrigerant contained in pipes 17 and branch pipes 11 and in the pressure chambers of compressor is by-passed to the low pressure side of said compressor so that upon starting said compressor the high pres sure side thereof is relieved of high pressure, thereby facilitating the starting operation of the compressing mechanism. i

The means for actuating the shaft 37 consists preferably of a pair of electro-magnets 57 arranged in casing 16. Cooperating with these electro-magnets are armatures 58, the outer ends of which are connected by U- shaped pieces 59 to the ends of a rock arm 60. The openends of U-shaped pieces 59 after being passed through the apertured ends of arinatures 58 and the ends of arm 60 are closed by clamps 61 which prevent the accidental vdisplacement of .said U-shaped pieces. Electro-magnets 57 are connectedby suitable connect-ions 57 to a switch (not shown) which may be operated in any suitable manner to alternately energize said electro-magnets whereby the armatures 58 are alternately attracted by the respective electromagnets, thereby causing quick rocking movement of arm 60' which is operatively connected to shaft 37 and causes the latter to turn in the properdirection to operate, through disk 36, the valve mechanism controlling the various pipe circuits.

Since shaft 37 has to move in an axial direction, when actuated, and since arm 60 occupies a fixed position relative to the axis of the electro-magnets 57, I provide a sleeve 62 which receives the lower end of shaft 37 and carries arm 60. The lower end of sleeve 62 is provided with a plug 64 which is loose ly mounted in said sleeve and has an upwardly projecting fin or blade 65 which slides freely in the downwardly presented slot 37 diametrically disposed in the extreme lower end of shaft 37.

A collar 66 is carried by the lower end of sleeve 62 and said collar is provided with a set screw 67 which engages sleeve 62 and when tightened distorts said sleeve and thereby secures plug 64 to sleeve 62, thereby establishing a fixed operative connection between arm 60 and plug 64. This plug has non-rotative engagement with shaft 37, whereby the rocking movement of arm 60 is transmitted to said shaft. The slot 37 in the lower end of shaft 37 is of sufficient depth to permit axial movement of said shaft without affecting the non-rotative engagement between plug 64 and the shaft.

As shown in the drawings, the electromagnets 57 are preferably mounted on a bracket 68 which is then fixed to the upper wall of casing 60. The lower end wall 16' is detachable from casing 16 having a threaded engagement with the peripheral wall of said casing, there being a gasket 69 projecting outwardly therefrom, a movable member connected to. all of said valve stems for simultaneously operating all of said valves, a revoluble member screw-seated in said valve chamber member and disposed parallel with said valve stems for actuating said movable member and a cover secured to said valve chamber member for enclosing said movable member and the projecting ends of said valve stems.

2. A valve mechanism comprising a onepiece member having a plurality of valve chambers and inlet and outlet ports communicating with the respective valve chambers, a valve movably mounted in each chamber for opening and closing the communication between the respective ports, valve stems slidably mounted in said member and carrying said valves at one of their ends, the opposite ends projecting beyond said valve chamber member, a movable member disposed below said valve chamber member and engaging the projecting ends of said valve stems for simultaneously operating all of said valves, a revoluble member screw-seated in said valve chamber member for actuating said movable member, and electro-responsive means for actuating said revoluble member.

3. A valve mechanism comprising a cylindrical member having a plurality of valve chambers and inlet and outlet ports communicating with the respective valve chambers, valve stems slidably mounted in said member parallel with the axis thereof, a valve mounted on each stem and disposed in each chamber for opening and closing the 001m munication between the respective ports, a. movable member arranged parallel with said cylindrical member and connected to said valve stems, simultaneously operating all of said valves, a revoluble member for actuating said movable member, and electrically controlled means for operating said revoluble member.

4. A valve mechanism for controlling a plurality of fluid circuits comprising a casing having a plurality of valve chambers each provided with inlet and outlet ports, a valve member longitudinally movable in said casing and extending into said valve chamber for controlling the communication between the respective ports, a revoluble member screw-seated in said casing parallel with saidvalve member, a disk fixed to said revoluble member and having slot connection with said valve member for causing longitudinal movement of said valve member when said disk is moved in axial direction by said screw member, and a mechanism for actuating said revoluble member.

tively connected to said member, and means for in'iparting rocking action to said arm.

, 6. A valve mechanism for controlling a plurality of pipe connections comprising a casing having a plurality of ports, a valve member movably arranged in said casin and controlling communication between suit ports, a valve stem slidably arranged in said casing and carrying said valve member at one end, the opposite end of said valve stem projecting beyond said casing, a revoluble member screw-seated in said casing parallel with said stem an operating member extending radially from said revoluble member and having an operative connection with said valve stem for actuating said valve stem longitudinally when said ECIGW member is actuated, and electro-responsive means for actuating said screw member.

In testimony whereof I hereunto ufiix my signature this 3rd day of July, 1924.

JOHN O. CARREY.

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