US2073785A - Acetylene generator feed valve vibrator - Google Patents

Description

March 16, 1937. M R DEMOTTE 2,073,785

ACETYLENE GENERATOR FEED VALVE VIBRATOR File-d Oct. 29, 1931 2 Sheets-Sheet l \J Q g n L n m N .gjm tv). Q ai p INVENTOR:

arch l6f1937 M. P. DE MoTTE ACETYLENE GENERATOR FEED VALVE VIBRATOR vFiled oct. 29, y1931 2 Sheets-Sheet 2 I'NVENTQR MAURICE F. DE MOTTE Patented Mar. 16, 1937 UNITED STATES ACETYLENE GENERATOR FEED VALVE VIBRATOR Maurice P. De Motte, Indianapolis, Ind., assgnor, by mesne assignments, to rUnion Carbidev and Carbon Corporation,

York l Application October 29,

9 Claims.

The invention is a Vibrator foragitating the feed valve in an acetylene generator of the carbide-to-water type.

`One object of the invention is to provide a vi- 5 brator that will operate Whenever gas is drawn from the generator. Another object is to provide a vibrator that will operate regardless of the amount of gas being drawn from the generator. Other objects are to provide a vibrator that is simple in construction, low in cost, reliable in operation, and free from trouble. Other aims, objects, and novel features will be apparent from the following specication and the accompanying illustrations in which:

Fig. lis a fragmentary vertical section of an acetylene generator showing my improved vibrator attached to the carbide feed valve thereof.

Fig. 2 is a'vertical section of one form of my improved vibrator showing the Vibrating element in rest position with one valve open.

Fig. 3 is a view similar to Fig. 2 showing the position of the vibrating element during operation with the other valve open.

Fig. 4 is a vertical section of another form of my vibrator. n

Fig. 5 is a sectional 'View taken along 5-5 of Fig. 3, and

1 Fig. 6 is a sectional View taken along line 6-6 of Fig. 4.

In a medium pressure generator of the type described, the carbide feed valve has two motions: a vertical motion` in response to the pressure within the generator to .start and stop the flow of carbide, and a rocking motion, in response to the movement of gas being drawn from the generator, to produce a uniform rate of flow when the valve is open. The means for opening and closing the carbide feed valve comprises a diaphragm responsive to gas pressure within the generator and the means for rocking the valve comprises a vibrator in the gas outlet of the generator.

One example of my vibrator is shown in Figs. 2 and 3. This vibrator comprises a casing I having an inlet II at one end thereof and an outlet I2 at the bottom thereof. For convenience in manufacture the casing I0 may be composed of two parts that are joined at VI3 by means of interfitting threads.

The interior of the casing I0 is provided with a horizontal cylindrical guideway I4; a beveled seat I5 in axial alinement with and slightly larger than the guideway; and a cylinder IB in axial alinement with the guideway and the beveled seat and somewhat larger than either. A gas passage extends through the guideway, the beva corporation of New 1931, serial No. 571,914f

eled seat,.and the cylinder, between the inlet II and theoutlet I2.

A vibrating mechanism within the casing I0 comprises a cylindrical guide I1 slidably mounted in the guideway I4 and provided with a segmental passage I8 therethrough smaller than either the inlet I I or the outlet I2. Y Integral with the guide I1 is a poppet valve I9 adapted to cooperate with the beveled seat I5 to close the gas passage through the casing I0. Guide I1 and poppet valve I9 are provided with an axial opening in which a shaft 20 is loosely fitted. Upon the inner end of shaft 20 a piston 2I is rigidly mounted. This piston 2l is provided with a stem 22 that normally rests against the poppet valve IS for the purpose of holding the valve and piston in a spaced relation. The outer end of shaft 20 is provided'with a nut or abutment 23 and between this nut and guide I1 a valve spring 24 is held in partially compressed condition. This spring 24 tends to normally hold poppet valve I9 in contact with the stem 22 o-f the piston 2 I.

An adjusting screw 25 is threaded in one wall of casing IIJ and the inner end of this screw is provided with an abutment 26. Between this abutment 2E and the piston 2 I, a recoil spring 21 is held. Attached to shaft 2U is another shaft or rod 28 that connects the vibrating mechanism with another part of the generator, such as the carbide feed valve or an arm carried thereby.

During the operation of this vibrator gas `at a pressure of about 15 pounds per square inch enters inlet Il and passes through passage I8 and poppet valve I9, which is normally open and relatively remote from its cooperating seat as shown in Fig. 2, and exerts a pressure against the piston 2I that moves it in the direction of gas flow. During 'this movement shaft 20 and valve spring 24 carry poppet valve I9 substantially the length of chamber I9a until it closes. After it closes, the inertia of piston 2| and the shaft 20, and the gas pressure in the chamber 29 between the valve I9 and the `piston -2I cause the piston 2l to move out of the chamber 29 and beyond the end of the cylinder I6 as shown in Fig. 3. This allows the gas in the chamber 29 to escape. As soon as the pressure of the gas in chamber 29 has been re- Vlieved the recoil spring 21 and valve spring 24 move piston 2l in the opposite direction and close Vthe cylinder I6. VAfter the piston 2l has closed the cylinder stem 22 of the piston 2| strikes valve I9 and then the whole vibrating mechanism is moved by spring 21 and the impact `of the piston 2| until poppet valve I9 opens. This openingallows gas to again `pass through the -poppet valve and bear against the piston and repeat the cycle after the inertia of the vibrating mechanism has been overcome. Therefore, as long as gas is being drawn from the generator through casing i uof the vibrator, the vibrating mechanism therein will continue to reciprocate and transmit its movement to the carbide feed valve of the generator.

Another example of my vibrator is shown in Fig. 4. This vibrator comprises a casing 30 having a gas inlet 3l at one end thereof and a gas outlet 32 at the under side thereof. The casing 39 may be formed in two parts, for convenience in manufacture, and joined by intertting threads. The interior of casing 30 is provided with a cylindrical horizontal guideway 33; a beveled seat 34 in axial alinement with and somewhat larger than the guideway; and acylinder 35 in axial alinement with guideway 33 and beveled seat 34 and somewhat larger than either. A vibrating mechanism within the casing 39 comprises a guide v36 in guideway 33 having a passage 37 therethrough of smaller area than the inlet 3l. A poppet valve 38 is integral with guide 36 and is adapted to cooperate with beveled seat 34. A piston 39 is likewise integral with guide 38 and is adapted to move in and out of cylinder 35. Valve 38 and piston 39 are spaced thereby forming chamber 29 therebetween.

A gas passage is provided in the casing 30 through guideway 33, beveled seat 34, chamber 29, and cylinder 35. A recoil spring 40 between slide valve 39 and an abutment 4l carried by screw 42 threaded in one wall of casing 30 is adapted to move the vibrating mechanism against the pressure of gas flow to close valve 38 and move piston 39 into cylinder 35 thereby closing the gas passage through the vibrator.

During operation the valve 38 is normally closed, the piston 39 is in the cylinder 35, and gas entering inlet 3| presses against the under side of poppet valve 38. When this pressure reaches a point where the force of spring 40 is overcome, poppet valve 38 is opened, and this opening allows the gas to press against the under side of piston 39. As the piston is larger than the poppet valve 38, the gas pressure exerts greater force and tends to quickly move it to open position. This opens the passage through casing 39 and allows gas to pass through the vibrator and reduce the pressure at the inlet. This pressure is reduced quickly and then spring 49 moves the vibrating mechanism against the flow of gas to closed position, from which the cycle of movement is repeated. Therefore, during the time that gas is being drawn from the generator through the vibrator the vibrating mechanism continues to reciprocate and this movement is transmitted to the carbide feed valve of the generator.

The vibrators shown in Figs. 2, 3 and 4 may be provided with other conventional features, such as packing 43, packing nut 44, and lock nut 45.

The means of attaching my improved vibrator to an acetylene generator is illustrated in Fig. 1, which shows a generator casing 48 having a carbide hopper 41, and a carbide feed valve 48 at the outlet thereof, carried by or joined to a supporting lever 49 by means of a pivot 59. Lever 49 is adapted to be operated by diaphragm 5l in response to variations in gas pressure within the generator to open and close valve 48 in a manner well known in the art.

The inlet of my improved vibrator 52 is connected by suitable pipe ttings 53 to and forms part of the main gas delivery outlet 54 of casing 46. A rod or shaft 28 attached to the vibrating element of my vibrator extends through ttings 53, outlet 54, and casing 46, and is joined by pivot 55 to arm 5G forming a part of valve 48. Therefore, when gas is being drawn from the generator, the movement of the vibrating mechanism is transmitted through rod 28 to arm 56, thereby causing valve 43 to rock or vibrate on its pivot 59, and this movement causes carbide to feed past the valve 48 at a more uniform rate.

My improved vibrator may be positioned otherwise than here indicated and it may be connected in a different manner with a carbide feed valve of a different type from that shown, and clearly it need not vibrate the feed valve in the manner shown by way of illustration. Also equivalent elements may be substituted for those shown and they may be arranged in a different manner without departing from the spirit of the invention or the scope of the claims.

I claim:-

1. A gas-operated vibrator comprising a casing having an inlet and an outlet for gas, a cylinder formed in said casing, a piston in said cylinder constructed and arranged to move out of said cylinder, and a recoil spring normally holding said piston in said cylinder, in combination with a poppet valve for closing the inlet to said cylinder, said poppet valve being movable with said piston, a guideway formed in said casing, and a guide in said guideway connected to said poppet valve.

2. A gas-operated vibrator comprising a casing having an inlet and an outlet for gas, a cylinder formed in said casing, a piston in said cylinder constructed and arranged to move out of said cylinder, and a recoil spring normally holding said piston in said cylinder, in combination with a poppet valve for closing the inlet to said cylinder, said poppet valve being movable with said piston, a guideway formed in the inlet end of said casing, and a guide in said guideway connected to said poppet valve, said guide having a segmental gas passage therethrough.

3. A gas-operated vibrator comprising a casing having an inlet and an outlet for gas, a cylinder formed in said casing, a piston, and a recoil spring normally holding said piston in said cylinder, in combination with a poppet valve for closing the inlet to said cylinder, said poppet valve being movable with said piston, a guideway adjacent and in continuation of the gas inlet in said casing, and a guide in said guideway connected to said poppet valve, said guide having a segmental gas passage therethrough smaller than the gas inlet in said casing.

4. A gas-operated vibrator comprising a casing having an inlet and an outlet for gas, a cylvinder formed in said casing, a piston, and a recoil spring normally holding said piston in said cylinder, in combination with a poppet valve for closing the inlet to said cylinder, said poppet valve being movable with said piston, a guideway formed in said casing, a guide in said guideway connected to said poppet valve, and a vibrating rod supported by said guide and movable with said piston, said rod being connected with the mechanism to be vibrated.

5. A gas-operated vibrator comprising a casing having an inlet and an outlet for gas, cylinder formed in said casing, a piston in said cylinder constructed and arranged to move out of said cylinder, and a recoil spring normally holding said piston in said cylinder, in combination with a. poppet valve for closing the inlet to said cylinder, said lpoppet valve being movable With said piston and said piston being movable independently of said poppet valve, a guideway formed in said oasing and a guide in said guideway connected to said poppet valve.

6. A gas-operated vibrator comprising a casing having an inlet and an outlet for gas, a cylinder formed in said casing, a piston in said cyling constructed and arranged to move out ci said cylinder, and a recoil spring normally holding said piston in said cylinder, in combination with a poppet valve for closing the inlet to said cylinder, said poppet valve being movable with said piston and said piston being movable independently of said poppet valve, a guideway formed in the inlet end of said casing, and a guide in said guideway connected to said poppet valve, said guide having a segmental gas passage therethrough.

7. A gas-operated vibrator comprising a casing having an inlet and an outlet for gas, a cylinder formed in said casing, a piston, and a recoil spring normally holding said piston in said cylinder, in combination with a poppet valve for closing the inlet to said cylinder, said poppet valve being movable with said piston and said piston being movable independently of said poppet valve, a guideway adjacent and in continuation of the gas inlet in said casing, and a guide in said guideway unitary with said poppet valve,

said guide having a segmental gas passage therethrough smaller than the gas inlet in said casing.

8. A gas-operated vibrator comprising a casing having an inlet and an outlet for gas, a cylinder formed in said casing, a piston, and a recoil spring normally holding said piston in said cylinder, in combination with a poppet valve for closing the inlet to said cylinder, said poppet valve being movable with said piston and said piston being movable independently of said poppet valve, a guideway formed in said casing, a guide in said guideway unitary with said poppet valve, and a vibrating rod supported by said guide and movable with said piston, said rod being connected with the mechanism to be vibrated.

9. A gas-operated vibrator comprising a casing having an inlet and an outlet for gas, a cylinder formed in said casing, a piston, and a recoil spring normally holding said piston in said cylinder, in combination wth a poppet valve for closing the inlet to said cylinder, said poppet valve being movable with said piston and said piston being movable independently of said poppet valve, a guideway formed in said casing, a guide in said guideway unitary with said poppet valve, and a vibrating rod supported by said guide extending loosely tted through said guide and said poppet valve and tightly connected to said piston, said rod being connected with the mechanism to be vibrated.

MAURICE P. DE MofrrE.

Images