RU35661U1 - Vessel-tank for circulating fluid supply circuit in mechanical seals - Google Patents

Description

2003116419

iiijiliiiiiiijillliiit Vessel-tank for circulating fluid supply to mechanical seals

The utility model relates to mechanical engineering and can be used in the design and operation of pumping units for high pressure circulating liquids.

When operating mechanical seals, an installation is necessary to create the pressure of the locking (release) fluid, which simultaneously provides cooling and lubrication of the seal parts. The supply of locking (separation) fluid to the mechanical seal is carried out according to the schemes with natural and forced circulation.

A known scheme for supplying a separation fluid to mechanical seals with natural circulation of the locking fluid, including a pneumatic accumulator (tank), heat exchanger, storage tank and valves (catalog "Mechanical seals of rotating shafts of apparatuses, TSINTIHIMESHFTEMASH, Moscow, 1979, p. 24).

The closest technical solution to the proposed one is the scheme for supplying locking fluid to the mechanical seals with forced circulation of locking fluid, which from the storage tank through the refrigerator enters the pump, from where it is supplied through the check valve to the receiver (tank), and then to the end chamber

MnK: F04D13 / 06.29 / 10

seals and into the storage tank through the filter (catalog "Mechanical seals of rotating shafts of apparatuses, TSINTIHIMNEFTEMASH, Moscow, 1979, p. 25), see Appendix.

The composition of such circuits for supplying locking fluid to mechanical seals includes a vessel-tank designed to smooth out pressure fluctuations caused by a pulsating flow and intermittent flow of locking (dividing) fluid, as well as to cool it (a coil is located inside the tank in which coolant circulates) . The design of such a tank and its elements must withstand high internal pressure.

The disadvantage of such vessel-tanks for the above circuits for supplying circulating (separation or locking) fluid to the mechanical seals is the low-tech design, which is made in the form of a single integral assembly, which is inconvenient if it is necessary to repair, clean the interior of the tank body through narrow inlets and outlets the fittings cannot be penetrated, so you have to cut the body by welding, and then brew it again.

The technical task of the utility model is to simplify the dismantling of the vessel-tank, increasing its reliability and maintainability.

The specified technical result is achieved by the fact that in the vessel-tank for the circuit supplying circulating fluid to the mechanical seal.

containing a shell with upper and lower elliptical bottoms, the lower bottom is fixed to the shell with detachable joints.

In an embodiment of the device for providing a detachable connection at the contact point of the shell with the lower bottom, the shell and lower bottom are provided with flanges connected by circumferential fastening elements, for example, studs with a nut.

In FIG. 1 shows a general view of a tank vessel; in FIG. 2 - its longitudinal section.

The body of the vessel-tank for the circuit for supplying circulating fluid to the mechanical seals contains a shell 1 with upper 2 and lower 3 elliptical bottoms. The lower bottom 3 is fixed to the shell 1 by detachable joints. For this, the shell 1 and the lower bottom 3 at the point of contact are equipped with flanges 4 and 5, respectively. The flanges are made in accordance with GOST 12821-80, are mounted respectively on the end of the shell 1 and the lower bottom 3 by welding and are connected to each other by circumferentially mounted studs with nut 6. Sealing the connection of flanges 4 and 5 is carried out according to the method of "thorn groove and with the help of rubber: gaskets.

A tubular heat exchanger 7 (Fig. 2) with inlet and outlet fittings 8 and 9 is installed inside the vessel-tank body.

The tank works as follows.

Under the influence of a pressure drop created by an external source, or under the action of natural circulation, oil (separation or

the locking fluid) enters through the inlet pipe 10 into the hollow vessel-tank (Fig. 2), passes along the coil of the tubular heat exchanger 7, being cooled by the steps of the coil in which coolant (water) circulates, then exits through the outlet pipe 11 and returns into the fluid circuit of the mechanical seal.

The proposed design of the vessel-tank for the circulating fluid supply circuit in the mechanical seals allows you to quickly dismantle it if you need to clean it or replace it, elements (coil, etc.), thereby improving working conditions, increasing its reliability and reducing labor costs for its operation .

The utility model can be used in the operation of mechanical seals of pumps, especially pumping high-temperature media.

Claims (2)

1. The vessel-tank for the circuit circulating fluid into the mechanical seal, containing a shell with upper and lower elliptical bottoms, characterized in that the lower bottom is fixed to the shell by detachable joints. 2. The vessel-tank according to claim 1, characterized in that in the place of contact of the shell with the bottom of the bottom of the shell and bottom are equipped with flanges connected by circumferential fasteners, for example, studs with a nut.