RU2176033C2 - Device for pumping high-viscosity liquids - Google Patents

Abstract

FIELD: pumping liquids; transfer of viscous petroleum products at negative temperatures, in particular, high-viscosity and high-density liquids, contaminated liquids, liquids containing large inclusions, pasty complex media, excrements with organic residue; cleaning of reservoir bottoms. SUBSTANCE: device has working member made in the form of spring located in housing made in the form of casing. Inner cavity of working member is provided with flexible shafts, intake and drain parts of casting are flexible. Mounted in supporting bearing unit is bush having in its end section which corresponds to configuration of curvature radius of helical line of spring. Locking bolt screwed into bush keeps spring pressed to bush and has concave surface corresponding to curvature radius of spring helical line. Gasket made from soft material is laid between locking bolt and outer surface of spring. Intake portion of casing is provided with loosening unit made in the form of pins with brushes; drain portion of casing is provided with bladed wheel which are set in rotation by means of flexible shafts secured to bush of supporting bearing unit. EFFECT: increased productivity of transfer of high-viscosity fluids at negative temperatures. 4 cl, 2 dwg

Description

 The invention relates to pumping devices for pumping liquids and can be used for pumping viscous petroleum products, in particular, in conditions of negative temperatures, liquids of high viscosity and density, contaminated liquids, liquids with large foreign inclusions, liquid porridge-like media of non-Newtonian nature, feces with residues of organic origin from wells and tanks, as well as for cleaning tank bottoms from oil residues and collecting spills from the ground.

 Known pumping devices such as fecal, sand, screw, screw, having rotating screws, screws, blades (1) or horizontally located spring-screw devices for distributing liquids through calibration holes to spray the latter into small droplets (2) )

 In known pumping devices, the working bodies, for example augers, have a rigid structure, which does not allow changing the points of intake and draining of the liquid or making spatial movements of the intake section necessary from cleaning the tank bottoms. Screw and vane pumping devices are not able to provide the necessary self-priming of highly viscous liquids, especially at low temperatures, are not structurally designed for pumping liquids of high viscosity and density, moving porridge-like non-Newtonian fluids with large foreign inclusions.

 Horizontal screw-type devices of horizontal design serve only to distribute liquids through the inlet openings of the perforated pipe-casings at a dead end version (the ends of the pipe-casings are muffled) and cannot work at low temperatures.

 The present invention solves the problem of increasing the productivity of pumping highly viscous liquids, in particular, at low temperatures.

 This problem is solved due to the fact that the device is equipped with an additional flexible shaft, the spring has a helix pitch equal to the diameter of the spring, flexible shafts are installed in the middle of the working body, mounted on the sleeve of the bearing-bearing device located outside the casing, while the intake and drain parts casing made flexible. The ripping device is installed in the intake part of the casing and is made in the form of fingers with brushes. An impeller is installed in the drain part of the casing. A sleeve is mounted in the bearing-bearing device, having a hole in the end part corresponding to the configuration of the radius of curvature of the spring helix, and a locking bolt that presses the spring to the sleeve, having a concave surface in the end part, and a soft gasket is installed between the locking bolt and the outer surface of the spring metal.

These signs are essential for solving the task, as:
1. The device is equipped with an additional flexible shaft. This achieves the possibility of installing a ripping device.

 2. The spring has a helix pitch equal to the diameter of the spring. This makes it possible to pump liquids with large foreign matter.

 3. In the middle of the working body installed flexible shafts, mounted on the sleeve of the bearing-bearing device. This reduces the load on the spring.

 4. The bearing-bearing device is located outside the casing. This achieves an increase in the bore of the casing.

 5. The intake and drain parts of the casing are flexible. This achieves the possibility of spatial movement of the points of intake and discharge of liquid.

 6. The ripping device is installed in the intake part of the casing and is made in the form of fingers with brushes. This achieves the loosening of highly viscous liquids, especially at low temperatures.

 7. A sleeve is mounted in the bearing-bearing device, having a hole in the end part corresponding to the configuration of the radius of curvature of the spring helix. This achieves the alignment of the working body inside the casing.

 8. The locking bolt, pressing the spring to the sleeve, has a concave surface in the end part. This ensures the reliability of fastening the spring to the sleeve.

 9. A soft metal gasket is installed between the locking bolt and the outer surface of the spring. This ensures the tightness of the connection.

 In FIG. 1 shows a section through a device for pumping highly viscous liquids.

 The proposed device consists of a frame 1, four posts 2 attached to the frame with the possibility of removal, two pipes 19, rigidly fixed to the posts 2 and mounted so as to form a gap between the ends of the pipes. On the outer surface of the pipes, a support-bearing device is mounted, consisting of a cylindrical housing 20, two bearings 13 sealed with glands 14 and closed by covers 8. A spacer sleeve 21 is installed between the bearings, simultaneously holding the glands and the device 10 for fixing the spring 7, consisting of a rotating bushings 23 with an opening extending into the gap formed by the pipes, and a locking bolt 9.

 Pulleys 12 are installed in the grooves of the housing, allowing through a belt drive 11 to transmit rotational motion to the housing of the bearing-bearing device from any drive device (electrical, mechanical, hydraulic).

 The spring is secured by pre-assembly in the spring wire of the sleeve 23 (Fig. 2) with a hole made taking into account the curvature of the helical surface of the spring, which is previously screwed into the housing 20 of the bearing-bearing device, taking into account the gap between the outer diameter of the spring and the inner surface of the casing . A spring 7 is passed through the hole of the sleeve 23. A locking bolt 9 having a concave, taking into account the curvature of the helix of the spring, end face screwed into the sleeve 23 ensures rigidity of the spring coil. To create tightness and increase the reliability of the connection between the locking bolt and the surface of the coil of the spring, a gasket 22 of soft metal is installed. Flexible shafts 6, 15 of the drive of the impeller 5 and the ripper 16 through the couplings 17 and 18 with an arm 24 are attached to the spring drive sleeve. Changing the points of intake and discharge of the liquid is ensured by attaching to the pipes 19 flexible intake 26 and drain 4 casings, with windows 25 made in them and fixed with clamps 3.

 A device for pumping highly viscous liquids works as follows.

 The rotational movement from the drive through the pulleys 12 of the belt drive 11, the bearing-bearing device, the sleeve 23 is transmitted to the spring 7 and the flexible shafts 6, 15, which drive the ripping device 16 and the impeller 5.

 The intake part of the casing 26 is lowered into the pumped liquid, which through the end of the pipe and the window 25 enters it. When the spring 7 rotates, the liquid rises or is transported (with the device horizontal) to the drain part of the casing 4 and, depending on the technological need, is drained through it or through the windows 27. To increase the pressure of the liquid at the end of the drain part of the casing, the impeller 5 is mounted on the flexible shaft 6 In the case of high viscosity of the liquid, especially at low temperatures, a rotating ripping device, loosening the thickened liquid, contributes to its entry into the intake pipe.

 The use of the invention allows to increase the productivity of pumping highly viscous liquids, liquids with foreign large inclusions, as well as to pump in conditions of negative temperatures.

LITERATURE
1. Chebaevsky V.F., Vishnevsky K.P., Nakladov N.N., Kondratiev V.V. Pumps and pumping stations: Textbook-M.: Agropromizdat, 1989. -416 p.

 2. USSR copyright certificate N 1561870, cl. A 01 C 23/00, 1990 - prototype.

Claims (4)

 1. A device for pumping highly viscous liquids, including a working body in the form of a spring mounted inside the housing, made in the form of a casing having an intake and drain parts with windows, a drive of the working body, a flexible shaft connected to it with the possibility of rotational movement and a ripping device, characterized the fact that the device is equipped with an additional flexible shaft, the spring has a helix pitch equal to the diameter of the spring, flexible shafts are installed in the middle of the working body, mounted on a bearing-bearing sleeve device located outside the casing, while the intake and drain parts of the casing are flexible.  2. The device according to claim 1, characterized in that the ripping device is installed in the intake part of the casing and is made in the form of fingers with brushes.  3. The device according to claim 1, characterized in that the impeller is installed in the drain part of the casing.  4. The device according to claim 1, characterized in that a sleeve is installed in the bearing-bearing device, having a hole in the end part corresponding to the configuration of the radius of curvature of the spring helix, and a locking bolt pressing the spring to the sleeve, having a concave surface in the end part, and between the locking bolt and the outer surface of the coil of the spring is a gasket made of soft metal.

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