RU2203743C2 - Device for liquid injection into active gas pipeline - Google Patents

Abstract

FIELD: operation of equipment for compressed gases; applicable in gas, oil and other industries. SUBSTANCE: device has shutoff valve installed on gas pipeline branch and carrying sluice consisting of body with seal and pressure bushing, and hollow rod installed on sluice for axial motion and provided with injector on its lower end and pipe union for liquid supply on its lower end, and hollow rod drive located on sluice. Upper end of sluice body has captive nut with outer circular recess for receiving drive base and possible its removal. Pressure bushing has bearing area installed on upper end of sluice body and provided with cylindrical branch pipe passed through captive nut central hole and installed on its bearing area. Upper end of cylindrical branch pipe has vertical groove through which pipe union for liquid supply is passed. Made on hollow rod upper end, above pipe union for liquid supply is radial hole which, together with through radial hole made on upper end of cylindrical branch pipe, receives pin for locking hollow rod in its working position. Drive is made in the form of removable winch whose base is located in outer circular recess sluice body captive nut, and crown block installed on hollow rod upper end. Rope fixed end secured to winch base is roved through crown block pulley. Device makes it possible to replace bulky metal intensive design of hollow rod drive with removable winch with crown flow and rope, more single and convenient in operation, and to provide for use of one drive on various points of liquid injection into gas pipeline, with simultaneous keeping of hollow rod in its working position after drive dismantling, or in changing over of drive to standby state that results in considerable saving on resources. EFFECT: improved design of device and higher efficiency. 2 cl, 2 dwg

Description

 The invention relates to the field of operation of equipment for compressed gases and may find application in gas, oil and other industries.

 A device for injecting liquid into a compressed gas medium is known — a compressor pipeline including a tap from its shell with a hatch covered by a cover (Khodyrev A, I., Krasnov VK. Pilot-industrial study of evaporative air cooling in a compressor 305VP16 / 70. Express information VNIIOENG Ser .: Machines and oil equipment 1986, 5, p.5-8).

 A disadvantage of the known device is the need to stop the compressor and relieve pressure in the gas pipeline, to discharge gas from the gas pipeline, followed by purging with air or inert gas during the installation operation of the device.

 Of the known devices, the closest to the proposed one is a device for introducing an aerosol into a gas stream containing a shut-off valve mounted on the gas outlet, on which a lock with a pressure sleeve is located, where a hollow rod with a fluid inlet and nozzle is mounted with the possibility of axial movement. The device is equipped with a rod axial displacement drive, comprising three racks, a chain gear with sprockets, a worm gear with a handle used to manually move the hollow rod with the nozzle at the lower end to the working position (N. Obolentsev. Technological aspects of inhibitor protection of large diameter pipelines transporting crude hydrogen sulfide-containing gas. - Thesis for the degree of candidate of technical sciences, M., 1980).

 The disadvantages of the known device include the large metal consumption, the cumbersome drive of the axial movement of the rod, as well as the need to use the drive to hold the rod in its working position during the injection of liquid into the existing gas pipeline.

 The basis of the present invention is the creation of a device for injecting liquid into an existing gas pipeline, the design features of which would allow for the dismantling of the axial movement of the hollow rod and keeping the latter in its working position without interrupting the liquid injection process, as well as to reduce the metal consumption of the structure.

 The problem is solved in that in a device for injecting liquid into an existing gas pipeline containing a shut-off valve installed on the gas outlet with a lock located on it, consisting of a housing with a seal and a push sleeve, and a hollow rod with an nozzle mounted on it with axial movement the lower end and the fluid inlet fitting at the upper end and the hollow rod displacement actuator located on the lock, according to the invention, the upper end of the lock housing is provided with a union nut with an external annular a point for placement in the latter with the possibility of removing the base of the drive, and the pressure sleeve is made with a support platform mounted on the upper end of the gateway housing, and is equipped with a cylindrical pipe passed through a central hole made in the union nut and installed on its supporting platform, while on the upper a vertical groove is made at the end of the cylindrical nozzle, through which a fluid supply fitting is passed, and at the upper end of the hollow stem, a radial hole is made above the fluid supply fitting for azmescheniya therein, and the radial through-hole formed at the upper end of the cylindrical pipe, a pin for fixing the hollow shaft in its working position.

 In addition, the drive is made in the form of a removable winch, the base of which is located in the outer annular groove of the cap nut of the gateway housing, and mounted on the upper end of the hollow rod of the crown block, through which a fixed end of the cable is thrown fixed to the base of the winch.

 The invention is illustrated in the drawing, where figure 1 shows a General view of the device; figure 2 shows the device in operating position.

 A device for injecting liquid into an existing gas pipeline contains a shut-off valve (3) installed on the branch (1) of the gas pipeline (2), on which a lock (4) with a seal (5), a pressure sleeve (6) and a union nut (7) are placed, the upper part of which an external annular groove is made (8). In the gateway (4) with the possibility of axial movement, a hollow rod (9) is installed with a nozzle (10) at its lower end. In the upper part of the hollow rod (9), a fitting (11) is installed on the lateral surface for supplying fluid to the nozzle (10). The pressure sleeve (6) is made with a support platform (12) and is equipped with a cylindrical pipe (13) with a vertical groove (14) to accommodate the fitting (11). The cylindrical pipe (13) is passed through the central hole (15) made in the union nut (7). In the upper part of the hollow rod (9) above the fixing line of the fitting (11), a radial hole (16) is made for placement in it and in the through radial hole (17) made at the upper end of the cylindrical pipe (13), a pin (18) for fixing the position of the hollow rod (9) in its working position.

 The drive, providing reciprocating movement of the hollow rod (9) from the lock (4), includes a removable winch (19) with a base (20) located in the annular groove (8) of the union nut (7), and mounted on the upper end of the hollow rod (9) crown block (21) with pulley (22). Through the pulley (22) the fixed end (23) of the cable (24) is thrown and fixed on the base (20).

 A device for injecting liquid into an existing gas pipeline works as follows.

 The hollow rod (9) with the nozzle (10) is moved into the cavity of the gas pipeline (2) using a winch (19). When the fitting (11) enters the groove (14) and the hole (16) is aligned with the hole (17), a pin (18) is simultaneously inserted into both of these holes, which will fix the hollow rod (9) in its working position. After that, it is possible to dismantle the axial displacement of the hollow rod (9) without interrupting the process of injecting liquid into the gas pipeline in order to use it at other points of aerosol injection into the gas stream or for storage. In this case, the base (20) of the winch (19) is removed from the union nut (7), and the crown block (21) with the pulley (22) is removed from the upper end of the hollow rod (9).

 When the nozzle (10) is withdrawn from the gas pipeline (2), the gas pressure force on the hollow rod (9) is used. In this case, a winch (19) is mounted on the gateway housing (4), and a crown block (21) is installed on the upper end of the hollow rod (9). Then, braking the winch drum (19), they provide the necessary speed for lifting the nozzle (10) and place it in the gateway (4), after which the shut-off valve (3) is closed.

 The technical result obtained by carrying out the invention is the replacement of bulky, metal-intensive structures of the hollow rod drive with a removable winch with crown block and cable, which is simpler and more convenient to use; the possibility of using one drive at different points of injection of liquid into the gas pipeline while maintaining the hollow rod in its working position after dismantling the drive or putting it in a reserve state, which leads to significant cost savings.

Claims (2)

 1. A device for injecting liquid into an existing gas pipeline, comprising a shut-off valve mounted on the gas outlet with a gateway located on it, consisting of a housing with a seal and a push sleeve, and a hollow rod with an nozzle at the lower end and an inlet fitting installed therein with the possibility of axial movement fluid at the upper end and a hollow rod displacement drive located on the gateway, characterized in that the upper end of the gateway housing is provided with a union nut with an external annular groove for placement in it with by removing the base of the drive, and the pressure sleeve is made with a support platform mounted on the upper end of the gateway housing and is equipped with a cylindrical pipe passed through a central hole made in the union nut and installed on its supporting platform, with a vertical groove made on the upper end of the cylindrical pipe through which the fluid inlet fitting is passed, and at the upper end of the hollow rod, a radial hole is made above the liquid inlet fitting for placement in it and in the through radial hole rstii, made at the upper end of the cylindrical pipe, a pin for fixing the hollow rod in its working position.  2. The device according to p. 1, characterized in that the drive is made in the form of a removable winch, the base of which is located in the outer annular groove of the cap nut of the gateway housing, and mounted on the upper end of the hollow rod of the crown block, through the pulley of which the fixed end of the cable is thrown fixed to winch base.

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