Патент USA US2112410код для вставки
March 29, 1938. \ F. R. RICHARD 2,112,410 AUTOMATIC SAFETY FIRING VALVE GOVERN IH IPEiGtW-‘M$T5017Y By?étmggiigw A llomeys‘ March 29, 1938. 2,112,410 F. R. RICHARD AUTOMATIC SAFETY FIRING VALVE 5 Sheets-Sheet 2 Filed Jan. 8, 1956 4 § l P A? N \ Inventor IJZJZZZ’? ardv By a? L g Attorney! March 29,1933. , FRRICHARD- 2,112,410 AUTOMATIC SAFETY FIRING VALVE Filed Jan. 8, 1936 s Sheets-Sheet z :24 7g. [nvenlor Bygémomm } m 5m A llorncy; v Patented Mar. 29, 1938 2,112,410‘ PATENT ()FFICE‘ ~ UNITED STATES _ 2,112,410 . AUTOMATIGSAFETY FIRING VALVE Francis R. Richard, Marshall, T'ex. Application January 8, 1936, Serial No. 58,214 2 Claims. (Cl. 236——26) This invention relates to safety valves and more particularly the invention resides in the ’ provision of an automatic safety ?ring valve designed to supplement the present arrangement 5 for ?ring boilers with oil, gas or any combustible material that may be conducted by piping. An object of the present invention is to pro vide means for controlling the boiler pressure bye-controlling the ?re and thus avoid any un necessary release ofsteam through the usual safety valve. * - ‘Still a further object of the invention is to provide a self contained unitary apparatus, which may be used without interfering with present .manually operated ?ring arrangement for boilers. Figure 3 is a side elevational view of the ap paratus with certain parts shown in section and Figures 4 and 5 are detail sectional views taken substantially on the lines 4—4 and 5--5 respec tively of Figure 2. . ' Referring to the drawings by reference nu merals it will be seen that the apparatus com prises a valve casing I which embodies a pair 10 of integral cylinders including a cylinder 2 of relatively small diameter and a cylinder 3 of relatively larger diameter. Further the inven tion comprehends the provision of a piston mounted for reciprocation within the casing I 15 Still another object ofthe inventlon'is to pro and including a pair of integral sections con vide a safety device 'that will act as an auxiliary sisting of a piston 4 operating within cylinder 2 and a larger piston 5 operating within cylinder to the safety valve on boilers, the safety valve functioning only when the device fails to func tion. . ' Still a further'objeot of the invention is to provide a self contained apparatus that will re duce the intensity of the ?re at a pressure slight ly less than the adjustment of the usual safety 25 valve, but which apparatus may be cut out at any time desired to permit the safety valve to function in the normal manner. A further object of the invention is to pro vide means for maintaining a predetermined 30 . boiler pressure without danger of the usual safety valve functioning with a consequent loss‘ of steam. Among the objects of the invention also is the provision of means for shutting off the ?re with out disturbing the adjustment of the manually 35 operated valve, as may be‘ desired, when for 3. Each of the pistons as shown are provided with suitable packing rings and are also pro 20 vided with reduced portions 6 and 1 respectively. For the casing I there is threaded into the casing at one end of the cylinder 3 a cap 5 into which is tapped one end of a T 9. For the relatively opposite end of the casing 25 I there is threaded into the end of the cylinder 2 a plug I 0 equipped with a gland structure I I for accommodating an adjustment rod I2 which has a portion threaded in the bore of the plug It as at I3. By axially adjustingthe rod I2 30 the stroke of the pistons 4 and 5 is regulated at will. At one side thereof the cylinder 2 has tapped into the wall thereof one end of a pipe I4 which leads, in the present instance, from the mani example, blowing out the burner, or in the case‘ of an emergency when fire is beyond control. Further, among the objects of the invention is fold of a conventional high pressure atomizer controlled by the ?reman in the usual manner. Also tapped into the same side of the cylinder the saving of fuel by a saving of steam that might otherwise escape through the usual safety valve, and by relieving the ?reman so that he 2 is a pipe I5 of smaller diameter and this pipe I5 leads from the steam manifold of the low can givev closer attention to maintaining an cili cient and safe water level in the boiler. Numbered‘ among the objects of the invention 45 is also the provision of a device embodying a construction, combination and arrangement here inafter more fully referred to, that may be in stalled with a minimum of alteration to present equipment. 50 Figure 2 is a view mostly in horizontal cross section through the apparatus. Still further, it is an object of the invention to provide a device of the character above men tioned which is sufficiently simple in operation as to require no specialized or highly skilled labor to operate the same, other‘ than now employed pressure atomizer. Steam entering the cylinder 2 from the pipes I4 and I5 pass‘ from the cylinder when the piston valve 4 is in open position through ports 16 provided in the wall of the cylinder 2 as clearly shown in Figures 2 and 4, and is con ducted through the medium of a pipe I1 to the burner atomizer of the boiler. Oil from a manually operable ?ring valve (not shown) enters the cylinder 3 through a port I 3, being conducted from the manually operat ing ?ring valve through the medium of a suit~ able pipe l9. With the piston valve 5 at the open position, which is the position shown in Figure 2 the oil The invention together with its objects and thus entering the cylinder 3 passes about or advantages will be best understood from a study around the reduced portion 1 of the piston and of the following description taken in connection , exhaust from the cylinder 3 through an exhaust in ?ring with present equipment. with the accompanying drawings wherein: Figure 1 is a-top‘plan view of the apparatus. port I9 to be carried off through‘the medium of a pipe 20 to the oil section of the burner 60 2 2,112,410 where the supply of oil to the burner is con trolled by the ?reman in the usual manner. For venting the casing l and to prevent the ac cumulation of steam within the casing I between the adjacent ends of the pistons 4 and 5, said casing l is provided with a suitable vent port 2|. For releasing pressure in chamber 22 provided larly intended for usein connection with boilers ?red with oil, and particularly locomotive boilers, a relatively simple arrangement may be pro at the outer end of the cylinder 3 the T-?tting 9 claimed as new is: is provided with a vent port 23. i The invention is also used in connection with a conventional diaphragm pressure regulating gov ernor 24 which is connected as at 25 with the ?t ting 9 and is also connected at 26‘with the boiler (not shown). Also the T 9 at the end thereof opposite to the 15 vided for ?ring boilers with gas or other com bustiblematerial that may be conducted by pip mg. Having thus described the invention, what is - 1. A device of the character described com prising a two-diameter casing presenting a pair 10 of alined cylinders one of which is of relatively small diameter and the other of which is rela tively large diameter, one of said cylinders being provided at one side thereof with a pair of steam inlet ports, and at an opposite side thereof with diaphragm pressure regulating governor 24 has circumferentially spaced outlet ports, and the connected therewith a ball check valve assembly 2‘! of any suitable known construction. largest cylinder being provided at one‘ side there of with an oil inlet port, and at the opposite side The operationof the invention may be brie?y described as follows: Steam under pressure’ is conducted through the medium of the pipes l4 and I5 into the cyl inder 2 from the high and low pressure atomizers respectively. As a result pistons 4 and 5 move as a unit to the position shown in Figure 2 un covering ports l6 permitting the steam from the pipes l4 and 15 to pass through the cylinder 2 and the pipe I’! to the burner atomizer. Also with pistons 4 and 5 in this position oil from the usual ?ring valve passes into the cylinder 3 about the reduced portion 1 of the piston 5 and from the cylinder 3 passes through the pipe 20 to the oil section of'the burner. When steam in the boiler reaches a predeter mined pressure the diaphragm pressure regulat ing governor 24 acts in response thereto to per mit the steam from the boiler to pass through the T 9 into the chamber 22. As the pressure in chamber 22 builds up pistons 4 and 5 in response 40 to this pressure move to the left in Figure 2 thus moving the reduced portion 1 of the piston 5 out of alinement with the ports l8 and I9 resulting in a cutting off of the ?ow of oil through the cylinder 3 and pipe 29 to the burner. As the pressure in the boiler falls diaphragm 45 pressure regulating governor 24 acts to cut off communication between the apparatus of the invention and the boiler and accumulated pres Q11 7 thereof with an oil outlet port, a pair of inte gral pistons mounted for reciprocation within said casing and including a smaller piston oper ating within. the ?rst named cylinder, and a larger piston operating in the second named cyl inder, each of said pistons having a reduced in termediate portion, the reduced intermediate portion of the smallest piston adapted to aline with one of said steam intake ports, and said steam outlet ports when said pistons are at the terminus of one stroke thereof, and the smallest diameter of the largest piston adapted to aline 30 with the oil inlet and outletports of the second cylinder when said pistons are at the terminus of their return strokes, a cap closing one end of said casing and the second named cylinder, a T ?tting tapped into said cap, and a diaphragm pressure regulating governor and a check valve respectively connected by said T ?tting in aline ment one with the other. 2. A device of the character described com prising a two-diameter casing presenting a pair 40 of alined cylinders one of which is'of relatively small diameter and the other of which is rela tively large diameter, one of said cylinders be ing provided at one side thereof with a pair of steam inlet ports, and at an opposite side there 45, of with circumferentially spaced outlet ports, and the largest cylinder being provided at one side thereof with an oil inlet port, and. at the opposite side thereof with an oil outlet port, a sure in the chamber 22 escapes to the atmosphere through vent port 23 so that the pressure of steam in chamber 28 will now act against the pair of integral pistons mounted for reciproca piston 4 to move the piston to the position shown in Figure 2 to permit a resumption of ?ow of piston operating within the ?rst named cylinder, and a larger piston operating in the second tion within said casing and including a smaller named cylinder, each of said pistons having a oil to the burner. When it is desired to cut out the automatic» reduced intermediate portion, the reduced inter mediate portion of the smallest piston adapted feature of the invention and allow the conven tional safety valve to function, communication to aline'with one of said steam intake ports, and said steam outlet ports when said pistons are at from the boiler to the diaphragm regulating gov ‘ernor 24 is cut off by a valve (not shown) placed the terminus of one stroke thereof, and the smallest diameter of the largest piston‘ adapted in the line 26 within easy reach of the ?reman. This will permit the apparatus to remain in open position. When it is desired to blow out the burner with out disturbing the adjustment of the manually operated ?ring valve and atomizer, a valve (not shown) arranged in a pipe (not shown) con necting the steam manifold of the burner with the check valve 21', is opened, allowing steam to raise the fall check valve and pass into cham 70 ber 22 for moving the pistons 5 and 4 to closed position. Under such condition steam is con veyed to the oil section of the burner by suitable branch conduit means (not shown). 75 It is to be understood that, while the inven tion as herein shown and illustrated is particu to aline with the oil inlet and outlet port of ' the second cylinder when said pistons are at the ter minus of their return strokes, a cap closing one end of said casing and the second named cyl inder, a T ?tting tapped into said cap, a dia 65 phragm pressure regulating governor and a check valve respectively connected by said T ?t ting in alinement one with the other, a‘ plug threaded into said casing at the end thereof re mote from said cap, said plug being provided with a gland structure, and an adjusting spindle threadedly connected with said plug and axially adjustable relative to said plug for controlling the stroke of said piston. ‘ . FRANCIS R. RICHARD.