US1865333A

US1865333A - Automatic control mechanism

Info

Publication number: US1865333A
Application number: US454055A
Authority: US
Inventors: William R Pendry
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-05-20
Filing date: 1930-05-20
Publication date: 1932-06-28
Anticipated expiration: 1949-06-28

Description

June 28, 1932. w. R. PENDRY AUTOMATIC CONTROL MECHANISM Filed May 20, 1930 2 Sheets-Sheet 1 June 2 1932. w. R. PENDRY AUTOMATIC CONTROL MECHANISM Filed May 20, 1930 2 Sheets-Sheet 2 671/50?! fl aL/mv E. PEA/DEV) Eatented dune 2, l9"

WTLLTAEE R. TENDBT, Q1 CLEVELAND, OHIO AUTQMTIC CNTRL ELL'ECEIAIQTISM Application filed. ma ac, read serial in. 454,055.

This invention relates to an automatic control apparatus and, while not limited thereto, relates more particularly to an automatic control for the turbine of a turbine driven gas 5 booster system, including a gas holder from which the gas is pumped.

The object of this invention is to provide a novel control operable by the fall and rise of the gas holder, whereby said holder will be maintained at or near its uppermost position at all times in order to maintain a constant pressure on the gas.

The invention is primarily intended for use with the gas holder used to store gas from 15 Toy-product coke ovens, and since such holders supply the gas for heating said ovens, it is necessary to maintain a substantially constant pressure on the gas. The excess gas is withdrawn from the holder and used for other 20 purposes, and it is the purpose of this invention to regulate the amount of gas with drawn from the holder for other uses than heating the ovens so as to provide a substantially constant pressure of gas for the ovens.

lln the drawings:

Figure 1 is an elevation of a gas holder having the control mechanism of this invention connected therewith.

Figure 2 is an enlarged detail view of the walking pipe showing its various elements.

Figure 3 is a fragmentary detail of the upper end of the vertical section of the walking pipe.

Figure 4 is an enlarged fragmentary view of the diaphragm operated control valve for controlling the flow of fluid to the turbine or booster, the diaphragm portion of the valve being partly in section.

Referring more particularly to the drawings, the letter A designates the gas holder which is of standard design and the letter B designates the building housing, gas booster 2 and control mechanism. r The booster 2 may be of any standard type,

the one shown being of the turbine driven centrifugal type. The turbine of the booster 2 is adapted to receive steam from a line 3 through a diaphragm operated valve 4:. The diaphragm 5 of the valve 4 is normally urged toward extended. position so as to normally urge the valve 4 toward open position by a spring 6.

The diaphragm 5 is adapted to be operated by hydrostatic pressure and a pipe line 7 is connected to the diaphragm chamber and to a vertically movable or walking pipe C. The walking pipe C comprises a swinging section 8 which has a pivotal connection 9 to the pipe line 7, and a vertical leg 10 which is provided with a pivotal connection 12 to the swinging section 8. The vertical leg 10 is provided with an eye 13 at its upper end to which a cable or other flexible member 14 is connected. The cable 14 is trained over suitable sheaves 15 and connected to the upper end of the gas holder A, as at 16.

The cable 14 is looped downwardly, as at 16, between two of the sheaves 15, and a sheave 17 is mounted in the loop and has a counter-weight 18 suspended therefrom.

In operation, the walking pipe Q will be caused to rise and fall in accordance to the rise and fall of the gas holder A, due to the connecting cable 14. The rise of the pipe U is limited by the floor beams 20 and the fall by the support 21. However, the gas holder A may over-run the limited travel of the pipe C, due to the counter-weighted loop 16.

llt is apparent that when the control system is once filled with water or other fluid to the level of overflow 26 of the walking pipe C there will be no need for additional water or other liquid except to make up for such losses as may occur from leaks or evaporation, but as these losses are inevitable convenient means is provided for supplying, either constantly or intermittently, water or other fluid to the system to maintain a constant head in the walking pipe C by a supply pipe 23 which is connected to the pipe line 7 and extends vertically to a point equal to or above the highest point to which the vertical leg 10 of the walking pipe C is lifted. The pipe 23 is adapted to have water or other fluid supplied thereto by a feed line 2%.

It is apparent that when the walking pipe C raises and lowers, the level of the water or other liquid in small supply pipe 23 and small vent pipe 29 Will rise and fallwithin the limits of vertical travel of head25 in its lower and upper positions.

To provide a reservoir for the water or other liquid required to fill

pipes

23 and 29 when the vertical leg 10 of the walking pipe C raises to its uppermost position without materially lowering the head of the liquid, the upper end of the vertical leg 10 of the walking pipe C is enlarged, as at 25, to provide a reservoir for the water or other liquid so that when the gas holder drops and the walking pipe C is raised the total head will not be materially lessened. The enlarged portion 25 of the vertical leg 10 is provided with an overflow outlet 26 adapted to discharge into a funnel-shaped end 27 of a drain pipe 28.

During the operation of the apparatus air may become locked in the diaphragm chamber of the Valve 4, and in order to prevent this, a small vent pipe 29 is connected with the diaphragm chamber of the valve and extended upwardly to a point above the maximum water level in the vertical leg 10 of the pipe C when said pipe is in its uppermost position.

In operation, when gas is being withdrawn from the gas holder A at a greater rate than it is being delivered to said holder, the holder will drop, thus raising the walking pipe C and increasing the hydrostatic pressure on the diaphragm 5 of the valve 4. When the hydrostatic pressure on the diaphragm 5 of the valve 4. is increased the valve 4 will be closed an amount in proportion to the increase in hydrostatic pressure, thereby decreasing. the speed of the pump or booster 2 and reducing the amount of gas being withdrawn from the gas holder A. As the volume of gas in the gas holder A increases the holder will rise and the pipe C will fall an amount proportionate to the rise of said holder, so as to lower or reduce the hydrostatic pressure on the diaphragm 5 of the valve 4 and permit said valve to open and increase the speed of the booster 2.

While I have shown and described one specific embodiment of my invention it will be understood that I do not wish to be limited thereto, since various modifications may be made without departing from the scope of my invention, as defined in the appended claims.

I claim 1. In a turbine driven gas booster system including a gas holder, an automatic control mechanism comprising a diaphragm control valve for controlling the steam supply to the turbine, means including a walking pipe for supplying hydrostatic pressure to said diaphragm valve, means connecting said walking pipe with said gas holder for causing said walking pipe to change its vertical position in accordance with the fall and lift of said 05 holder so as to vary the hydrostatic pressure including a gas holder, an automatic control mechanism comprising a diaphragm control valve for controlling the steam supply to the turbine, means including a walking pipe for supplying hydrostatic pressure to said diaphragm valve, a cable connected to said walking pipe and to said gas holder for causing said pipe to change its vertical position in accordance with the lift and fall of said holder, said cable being trained over suitable sheaves and provided with a counter-weighted loop whereby overrun of said holder is permitted.

3. In a turbine driven gas booster system including a gas holder, an automatic control mechanism comprising a diaphragm control valve for controlling the steam supply to the turbine, means including a walking pipe for supplying hydrostatic pressure to said diaphragm valve, a cable connected to said walking pipe and to said gas holder for causing said pipe to change its vertical position in accordance with the lift and fall of said holder, said cable being trained over suitable sheaves and provided with a counter-weighted loop whereby overrun of said holder is permitted means for receiving the overflow from said pipe, and means for supplying fluid to said pipe to maintain a constant head in said pipe.

In testimony whereof, I have hereunto set my hand.

WILLIAM R. PENDRY.