US534514A - Safety-valve - Google Patents
Safety-valve Download PDFInfo
- Publication number
- US534514A US534514A US534514DA US534514A US 534514 A US534514 A US 534514A US 534514D A US534514D A US 534514DA US 534514 A US534514 A US 534514A
- Authority
- US
- United States
- Prior art keywords
- valve
- pressure
- piston
- diaphragm
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000012530 fluid Substances 0.000 description 18
- 238000010276 construction Methods 0.000 description 6
- 208000001187 Dyskinesias Diseases 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000266 injurious Effects 0.000 description 2
- 230000000414 obstructive Effects 0.000 description 2
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
- F16K17/105—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve using choking or throttling means to control the fluid operation of the main valve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/6851—With casing, support, protector or static constructional installations
- Y10T137/7043—Guards and shields
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7758—Pilot or servo controlled
- Y10T137/7762—Fluid pressure type
- Y10T137/7764—Choked or throttled pressure type
- Y10T137/7765—Pilot valve within main valve head
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7758—Pilot or servo controlled
- Y10T137/7762—Fluid pressure type
- Y10T137/7769—Single acting fluid servo
Definitions
- My invention consists of improved contrivances whereby the valve is slightly overbalanced and kept closed by the fluid to be controlled, and improved auxiliary valve devices for automatically relieving the overbalancing pressure by Increase of pressure of the confined fluid, and also improved lock-up and testing devices for both the auxiliary and main valves, all as hereinafter described, reference being made tothe accompanying drawings, in which- Figure 1, is a sectional elevation of my improved valve in a construction in which the valve opens against the confined fluid.
- Fig. 2 is a similar View of the said valve in a construction by which the valve opens with the outflow of the confined fluid.
- Fig. 3 is partly a sectional elevation and partly a side View of a duplex valve constructed same as in Fig. 2, and also having the lock-up and testing 1ever device.
- Fig. 4 is an elevation of'the valve of Fig. 3, as seen from a direction at right angles to the view of Fig. 3.
- the valve proper is represented at a. It is overbalanced and kept closed by the pressure of the fluid to be controlled by it.
- Figs. 1 and 3 there is a diaphragm Z9, whereon the fluid acts with pressure slightly overbalancing the pressure tending to open the valve and thus keeps it closed on the seat 0, without much pressure thereon avoiding the injurious efliects of excessive pressure of the valve on the seat.
- the construction of Fig. 1, is that'of a silent safety valve discharging into a condenser.
- Fig. 2 it is a piston cZ,.instead of the diaphragm by which the valve is overbalanced.
- the overbalancing fluid is admitted to the diaphragm or piston by the passage 1', extended by a pipe into the locality of quiet and uniform pressure'of the steam in Figs.,2 and 3.
- a valve thus overbalanced enables a large automatically opening valve to be controlled by an auxiliary valve m, and a small light spring Z, such as is within practicable sizeiand will be sensitive to act and easy to adj ust,whereas the common spring safety valve in which the springres'ists the whole opening power of the confined fluid is I very difficult to gage within narrow limits, and is variable in action and unreliable.
- Fig. 1 normal pressure on the upper side of valve a, and also inside of thediaphragm, to which it enters through passages 15, u, and port 2;, keeps valve a, closed but when the pressure rises it raises valve m, against the spring byits effect under shoulder Z, so as to cut 06 port o, and open the diaphragm to the low pressure side through exhaust passage q, so as to exhaust the high pressure fromthe diaphragm and allow the valve to open by the pressure under the diaphragm and when the pressure falls, above the valve a, to such extent that valve m, falls :by the eifect of the spring, the high pressure then enters the diaphragm and the valve a, closes.
- the pipes i in Figs. 2 and 3 are extended downward a suitable, distance to receive the confined fluid from a position where it is more quiet and less liable to be of less pressure than nearer'the valve where its rapid movement and broken condition may be such as to render it less effective for actuating the controlling devices.
- Thetension of the spring Z is adjusted by the screw plug y in the tubular stem a, containing valve m, and attached to valve a, and extending up through the stufling box I).
- the valve m also has a stem c, onwhich the spring Z, is arranged and extending up through the plugy so that it can beused readily for lifting valve m, by hand from time to time to test the Working of it and the main valve.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Description
' 2 Sheets-Sheet 1'. G. J. MELLIN.
SAFETY VALVE.
Patented Feb. 19, 1895.
(No Model.) 2 Sheets-Sheet 2.
C. J. MELLIN.
' SAFETY VALVE.
Patented Feb. 19, 1895.
CARL .I..1vInLLIN, OF RICHMOND, VIRGINIA.
SAFETYy-VALVE.
ePnoIFIoATmN forming part of Letters Patent No. 534,514, dated February 1e, 1895. Application filed January 23, 1890; Serial No. 337,888. (No model.)
To aZZ whom it may concern:
ments in Stop, Safety, and other Valves, of
which the following is a specification.
My invention consists of improved contrivances whereby the valve is slightly overbalanced and kept closed by the fluid to be controlled, and improved auxiliary valve devices for automatically relieving the overbalancing pressure by Increase of pressure of the confined fluid, and also improved lock-up and testing devices for both the auxiliary and main valves, all as hereinafter described, reference being made tothe accompanying drawings, in which- Figure 1, is a sectional elevation of my improved valve in a construction in which the valve opens against the confined fluid. Fig. 2, is a similar View of the said valve in a construction by which the valve opens with the outflow of the confined fluid. Fig. 3, is partly a sectional elevation and partly a side View of a duplex valve constructed same as in Fig. 2, and also having the lock-up and testing 1ever device. Fig. 4, is an elevation of'the valve of Fig. 3, as seen from a direction at right angles to the view of Fig. 3.
The valve proper is represented at a. It is overbalanced and kept closed by the pressure of the fluid to be controlled by it.
In Figs. 1 and 3 there is a diaphragm Z9, whereon the fluid acts with pressure slightly overbalancing the pressure tending to open the valve and thus keeps it closed on the seat 0, without much pressure thereon avoiding the injurious efliects of excessive pressure of the valve on the seat. The construction of Fig. 1, is that'of a silent safety valve discharging into a condenser. In Fig. 2, it is a piston cZ,.instead of the diaphragm by which the valve is overbalanced. The overbalancing fluid is admitted to the diaphragm or piston by the passage 1', extended by a pipe into the locality of quiet and uniform pressure'of the steam in Figs.,2 and 3. In Fig. 1 it enters'by the shorter passage 2'. A valve thus overbalanced enables a large automatically opening valve to be controlled by an auxiliary valve m, and a small light spring Z, such as is within practicable sizeiand will be sensitive to act and easy to adj ust,whereas the common spring safety valve in which the springres'ists the whole opening power of the confined fluid is I very difficult to gage within narrow limits, and is variable in action and unreliable.
In Fig. 1 normal pressure on the upper side of valve a, and also inside of thediaphragm, to which it enters through passages 15, u, and port 2;, keeps valve a, closed but when the pressure rises it raises valve m, against the spring byits effect under shoulder Z, so as to cut 06 port o, and open the diaphragm to the low pressure side through exhaust passage q, so as to exhaust the high pressure fromthe diaphragm and allow the valve to open by the pressure under the diaphragm and when the pressure falls, above the valve a, to such extent that valve m, falls :by the eifect of the spring, the high pressure then enters the diaphragm and the valve a, closes.
In Fig. 2 normal high pressure below the valve a, keeps itclosed by entering through passages i and 10, above piston d, which is larger than valve a, but increase of the same above the normal raises valve m, so as to shut off the high'pressure from below by head m and open the space above piston d, to the ex haust through passage ac, when valve a, opensand reduces the pressure to the normal condition again. Then the spring Z, forces valve m, down again and again opens the space above'piston'cZ, to the pressure from below for nearly balancing valve a.
In Fig. 3, the arrangement and operation are substantially the same as in Fig. 2, the only difference being in the use of the ,diaphragm 2), instead of the piston d.
The pipes i in Figs. 2 and 3 are extended downward a suitable, distance to receive the confined fluid from a position where it is more quiet and less liable to be of less pressure than nearer'the valve where its rapid movement and broken condition may be such as to render it less effective for actuating the controlling devices. .Thetension of the spring Z, is adjusted by the screw plug y in the tubular stem a, containing valve m, and attached to valve a, and extending up through the stufling box I). The valve m, also has a stem c, onwhich the spring Z, is arranged and extending up through the plugy so that it can beused readily for lifting valve m, by hand from time to time to test the Working of it and the main valve.
For a lock-up device to prevent tampering with the adjusting plug y, I place the cap 61, over it and couple the rod 0, with the neck of the cap by the key 9', extending through the slot f, of the rod extended far enough below the key to leave the piston free to rise freely in the performance of its function in connection with the main valve, and to facilitate lifting said valve m, for testing purposes I apply the lifting handle g, to the top of the neck of the cap as shown. I employ the usual testing lever h, for testing the main valve 0,, and so that it may be used to try the auxiliary valve independently of the main valve. I make the cap to extend at the lower end alittle lower than the check nut 11' used to fasten the adjusting plug g, which nut is made to project outward to a greater extent than stem at, so that lever 72/ working under both of these devices will first raise auxiliary valve m, sufficiently to test it properly and then being still further raised will lift main valve to, also.
I claim as my invention- 1. The combination with the valve having the tubular stem extending through the cover of the valve of the overbalancing piston or diaphragm, the auxiliary piston valve and spring locatedin said valve, said piston valve having a stem extending upward through the plug in the end of the tubular stem of the main valve so as to permit the piston valve to be lifted by said stem, the inlet passage normally admitting overbalancing pressure to said piston or diaphragm through said piston valve, and the exhaust passage from said overbalanciug piston or diaphragm through said piston valve, and normally closed thereby, said inlet and exhaust passages and piston valve adapted for closing the former and opening the latter by the abnormal movement of the valve substantially as described.
2. The combination with the overbalanced main valve, and the auxiliary valve and spring controlling the difference of pressure, effecting the opening and closing of the main valve, and with the adjusting nut of said spring, of the lock-up cup attached to the stem of the auxiliary valve, and covering said nut, the connection being such that the valve is free to rise without obstruction by the cap, While the raising of the cap raises the valve substantially as described.
3. The testing lever, main valve stem, check
Publications (1)
Publication Number | Publication Date |
---|---|
US534514A true US534514A (en) | 1895-02-19 |
Family
ID=2603277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US534514D Expired - Lifetime US534514A (en) | Safety-valve |
Country Status (1)
Country | Link |
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US (1) | US534514A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2436242A (en) * | 1944-01-11 | 1948-02-17 | Romce Pump Company | Valve |
US2460908A (en) * | 1943-11-24 | 1949-02-08 | Ite Circuit Breaker Ltd | Valve mechanism |
US2498542A (en) * | 1944-03-20 | 1950-02-21 | Vickers Inc | Relief valve for power transmissions |
US2571154A (en) * | 1944-10-30 | 1951-10-16 | Mercier Jean | Servo pressure regulator valve |
US2584523A (en) * | 1949-03-28 | 1952-02-05 | Beaton & Cadwell Mfg Co Inc | Pressure relief valve |
US2601870A (en) * | 1947-11-21 | 1952-07-01 | Niles Bement Pond Co | Valve mechanism |
US2619112A (en) * | 1946-06-12 | 1952-11-25 | Denison Eng Co | Pressure relief valve |
US2788191A (en) * | 1953-06-26 | 1957-04-09 | Westinghouse Electric Corp | Circuit breaker blast valve mechanism |
US2827075A (en) * | 1944-10-30 | 1958-03-18 | Mercier Jean | Servo pressure regulator valve |
US2968464A (en) * | 1955-12-20 | 1961-01-17 | Marotta Valve Corp | Pressure operated valve with magnetically actuated pilot |
US3608580A (en) * | 1969-12-18 | 1971-09-28 | Kelsey Hayes Co | Pilot-operated relief valve |
US20090285790A1 (en) * | 2000-08-14 | 2009-11-19 | Fallon Joan M | Methods of treating and diagnosing parkinsons disease and related dysautonomic disorders |
-
0
- US US534514D patent/US534514A/en not_active Expired - Lifetime
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2460908A (en) * | 1943-11-24 | 1949-02-08 | Ite Circuit Breaker Ltd | Valve mechanism |
US2436242A (en) * | 1944-01-11 | 1948-02-17 | Romce Pump Company | Valve |
US2498542A (en) * | 1944-03-20 | 1950-02-21 | Vickers Inc | Relief valve for power transmissions |
US2571154A (en) * | 1944-10-30 | 1951-10-16 | Mercier Jean | Servo pressure regulator valve |
US2827075A (en) * | 1944-10-30 | 1958-03-18 | Mercier Jean | Servo pressure regulator valve |
US2619112A (en) * | 1946-06-12 | 1952-11-25 | Denison Eng Co | Pressure relief valve |
US2601870A (en) * | 1947-11-21 | 1952-07-01 | Niles Bement Pond Co | Valve mechanism |
US2584523A (en) * | 1949-03-28 | 1952-02-05 | Beaton & Cadwell Mfg Co Inc | Pressure relief valve |
US2788191A (en) * | 1953-06-26 | 1957-04-09 | Westinghouse Electric Corp | Circuit breaker blast valve mechanism |
US2968464A (en) * | 1955-12-20 | 1961-01-17 | Marotta Valve Corp | Pressure operated valve with magnetically actuated pilot |
US3608580A (en) * | 1969-12-18 | 1971-09-28 | Kelsey Hayes Co | Pilot-operated relief valve |
US20090285790A1 (en) * | 2000-08-14 | 2009-11-19 | Fallon Joan M | Methods of treating and diagnosing parkinsons disease and related dysautonomic disorders |
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