US1527731A - Injector - Google Patents

Description

Feb. 24, 1925.

J. M. GONZALEZ numero;

Fuga Jan. '17.; 1an

Patented Feb. 24, 1925.

UNITED STATES 1,527,731 PATENT oFFicE..

JOAQUIN MORET GONZALEZ, OF MARCANE TERMINO, CUBA.

INJECTOR.

Application led January 17, 1923. Serial No. 613,228.

' cessible and removable; to provide means for positively seating the main steam valve while' the teaser or lifting valve is being opened, and to provide novel mea-ns for cleaning the injector and preventing the deposit of mud or other residues and the formation of scale. Other objects will be apparent in the following description and accompanying drawings.

In the drawings:

Figure 1 is a longitudinal vertical section of an injector constructed in accordance with my invention;

Figure 2 is a section on the line 2-2 of Figure 1; and

Figure 3 is a section on the line 3-3 of Figure 1. Y

The body portion or casing of the injector, indicated at 10, is provided with the usual steam inlet 11, water inlet 12, overiow outlet 13, and delivery outlet 14. vThe various inlets and outlets are suitably threaded to facilitate the attachment of piping. The casing is provided with various transverse walls or partitions having aligned openings therein to receive the combined forcing nozzle and delivery tube 15, the lifting nozzle 16, steam valve seat 17, and bonnet 18 for supporting the valve actuating rod 19. The diameters of these openings, and of the members which fit therein, increase progressively from front to rear of the casing, in order that all of the above named parts may be accessible from the rear of the casing, and may be removed without disturbing` the piping or the connection of the casing to the boiler. It will be noted that the check valve 2O seats at ,21 on the end ofthe delivery tube 15, and is supported in a guideway 22 threaded on the end of the tube 15. Thus when the tube is removed the check valveI is removed with it. This greatly facilitates repair and adjustment of the check valve, which is a moving part, and is usually the most inaccessible member in an injector.

The main steam nozzle 23 isi formedintegral with the valve seat member 17, and

with the lifting nozzle- 16, extending through the latter and terminating j just within the rear end of the tube 15. A main valve seat 25 is formed onthe member'17 at the end of the steam nozzle 23, and an auxiliary valve seat 26 is formed somewhat to the rear thereof. The auxiliary valve 27 is rigidly securedv to the valve rod 19 and is made hollow to contain the main valve 28, which projects beyond the auxiliary valve so that both valves may in closed position at the same time.

The transverse walls or partitions divide the casing into a lifting or suction chamber 31, a water chamber 32, and an overflow chamber 33, the latter being provided with the usual overflow poppet valve 34, opening Y intothe overflow pipe 35. lAV stem 36 is provided for positively seating or locking the overflow valve when so 4desired for certain operating conditions, as is well known. The usual communication kbetween the forcing tube and the overliow chamber is provided in the present invent-ion by the radial chiots 15a in the tube 15.

The water chamber and the overflow chamber communicate with each other through the passageway 37, and have a common outlet 38 into the overflow pipe 35. This communication and this outlet are adapted to be closed by a unitary drainage valve 39 which seats at 40 and 41. The valve 39 is supported on and actuated by a valve rod 42 sliding in a sleeve passing through the suction chamber 31.

An operating handle 43 for the steam and drainage valves is pivoted to the lfulcrum 44 which is in turn pivoted to the casing 10. The valve rod 19 and the link 45 connected to the valve rod 42 are pivoted to the handle 43 on opposite sides of the fulcruni, so that The main valve has Y a limited sliding movement within the aux- V as the steam valve is opened, the drainage valve is closed, and vice versa. A segment 46 is rigidly secured to the rod 19 and provided with notches for engagement with a spring actuated paw-l 47. l/V hen the handle is manipulated the pawl slides over the segment and engages the notches, which act as stops to prevent the handle from being in` advertently moved too far. The contour ot the pawl and notches is such, however, that the handle can be pulled `past any notch by the application of a moderate force.

Tater may pass `from the water inlet l2 into the suction chamber through an open` ing 48 controlled by a valve 49. operated by a hand wheel 50.

The operation of my injector is as fol.- lows: When it is desired to start the injector, the valve 49 is opened to admit water to the suction chamber 3l, and the handle 43 is pulled back until the pawl engages the, notch 5l. This opens the auxiliary steam valve 27 andadmits steam to the passages 52, the main valve being held tightly closed by the spring. Jets of steam issuing from the passages 52 enter the suction or lifting nozzle 16, creating` suction as is well known, and lifting water into the suction chamber 31. lVhen water appears at the overflow, the handle 43 is pulled clear back, opening the main steam valve 28 and closing the drainage valve. Valve 28 admits steam to the nozzle 23, and the jet of steam issuingv from this nozzle causes the well known injector action, forcing water through fthe.

check valve against the boiler pressure. To stop the injector, the valve 49 is closed and the handle 43 moved forward until the pawl engages the notch 53. In this position the drainage valve opens the chambers 32 and 33 to each other and to the atmosphere, but the main steam valve is still open. The powerful jet of steam issuing from the nozzle 23 blows out the chambers 32 and 33, ejecting all mud and residues through the passage 33, and leaving no water standing in the chambers to form scale. W'hen the blow# ing out operation is completed .the handle 1s moved forward, closing the steam'valves.

It is to be understood that the invention is not limi-ted to the particular details of construction described for the salie of illustra` tion, but includes such changes as come within the scope of the appended claims.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

1. In an injector, in combination, a main steam nozzle, an auxiliary steam nozzle, a valve for admitting steam to each of said nozzles, means for successively opening said valves, and means interposed between the main valve a-nd the auxiliary valve for positively seating the main valve while the auxiliary valve is beingk opened.

2. In an injector, in combination, a mainsteam nozzle, an auxiliary steam nozzle, a valve for admitting steam to each of said nozzles, means for successively opening said valves, and a spring interposed between said -means and the main valve to hold the main valve positively seated while the auxiliary valve is being opened.

3. In an injector, in combination, a steam valve, a forcing tube, a casing surroundingthe vforcing tube, an outlet for said casing, means for closing the outlet when the injector is operating, and means for simultaneously Iopening the outlet and admitting steam to said casing to eject residues therefrom.

4. In an injector, in combination, a steam valve, a forcing tube, a water chamber and' an overflow chamber surrounding said .tube and communicating with each other, and means for automatically closing the communication when the steam valve is opened.

5.` In an injector, in combination, a steam valve, a forcing tube, a casing surrounding the tube and having a water chamber open to the atmosphere and an overflow chamber communica-ting therewith, and a single valve Yfor closing the communication 'between the chambers Aand the opening to the atmosphere when the steamvalve is opened.

In testimony whereof I'lhereunto affix my j signature.

JOAQUIN MORET GONZALEZ.

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