RU186145U1 - Vibrating frame vibrating screen - Google Patents

Abstract

The vibrating frame frame of the vibrating screen, consisting of a frame with stops and wedges, has transverse supports made with a bend. The bend of the transverse supports is made in radius and has a height in the center of the support from 2 mm to 10 mm from the horizontal surface, and the transverse supports are located along the length of the frame with equal intervals equal to the width of the frame sieve panels.

Description

The inventive vibration frame for vibrating screens refers to the means of removing fluid from the mixture, when separating the solid phase into fractions, and can be used in systems for cleaning drilling mud from cuttings.

According to the USSR author's certificate for invention No. 686783 (class MPK V07V 1/48, priority date 07/28/1977) [1], for a more uniform tension of the screening surface, the screen for the vibratory separator is equipped with a sleeve installed under the screening surface and made from a corner, vertical the shelf of which forms the lateral surface of the sleeve, and the horizontal shelf is made with perforation, the walls of the housing being formed by the vertical walls of the corners, and the sleeve is connected to the housing by means of bolted connections.

The disadvantage of this vibrosieve design is that these devices do not allow you to stretch the vibrosieve grid over the entire surface so that it does not bend during operation and gaps do not form, given that during operation of the vibrosieve, heavy drilling fluid exerts pressure on it. In addition, the technology of removing the mesh when replacing it is quite laborious.

Various types of devices are used to tension the mesh, for example, a device for mesh tension according to the USSR copyright certificate for invention No. 845879 (class IPK V07V 1/48, priority date 10/16/1979) [2].

According to this invention, the device for tensioning the mesh comprises spring-loaded curtains mounted on the frame having sides and interacting with the shoulders of the mesh with traverses mounted on the curtains, cam shafts installed between the traverses and the sides of the frame.

A vibrating screen is known, according to the USSR author's certificate for invention No. 1694243 (class IPK V07V 1/48, priority date 05/05/1988) [3], in the housing of which there are supports in the form of plates installed along the vibrating screen. On the plates, relying on elastic pads located on the supports, a grid is placed with tension. In this case, the elastic pads are made of different heights.

The disadvantage of these designs vibrosieve is that they are not easy to manufacture and require complex highly qualified tinctures to provide the necessary degree of tension of the grids and the design performance during operation.

The closest technical solution, and therefore taken as a prototype, is a device for attaching sieves according to the USSR copyright certificate for invention No. 1319926 (class IPK V07V 1/48, priority date 01/21/1986) [4], including cross-beams, on which are longitudinal supports with shock-absorbing elements, installed with shock-absorbing elements, installed with the possibility of interaction with the sieve, a device for tensioning and fixing the sieve. The longitudinal supports are made in the form of lower and upper two-arm self-aligning levers, the lower of which are mounted by means of a hinge on a transverse link-beam, and the upper ones on each shoulder of the lower lever, with shock-absorbing elements located at the ends of the upper levers.

The disadvantage of the design of the device for attaching the sieve described above is that in actual use the drilling fluid abundantly fills the movable multi-element structure, enters the articulation elements and fills them, thereby contributing to the formation of corrosion on them and, ultimately, in the absence of complex preventive events, to the conclusion of the entire device from working condition.

The objective of the claimed design of the frame of the vibrating frame of the vibrating sieve is to achieve uniform tension on the screening surface of the frame sieve panels, simplifying their installation, improving reliability and life, and ultimately increasing the performance of the entire vibrating screen.

The task is carried out due to the fact that the movable vibrating frame of the vibrosieve has a frame with stops and wedges on which, according to this technical solution, several transverse supports are installed with a bend, and the bending of the transverse supports is made in radius and has a height in the center of the support from 2 mm to 10 mm from the horizontal surface, and the transverse supports are located along the length of the frame with equal intervals equal to the width of the frame sieve panels.

It was established by calculation and experimental means that when the value of the transverse supports made according to the bending radius (N) is less than 2 mm, the frame sieve panels installed on them, when drilling mud passes through them, bend under the weight of the solution and, as a result, troughs form on them. This leads to a decrease in cleaning efficiency and productivity when filtering the drilling fluid, especially at low costs, since not all the surface of the frame screen panels is involved in the filtering.

If the value of the transverse supports made along the bending radius (H) is more than 10 mm, the resource of the frame panels installed on them during operation is significantly reduced, since in this case the strength of the frame screen panels, which are made of plastic materials, decreases.

Due to the fact that the frame sieve panels are mounted on curved transverse supports, when they are mounted on a vibrating frame, the vibrating screens take on a curved shape of supports, which contributes to the uniform tension of grids on them. In addition, when the drilling fluid passes through them, the frame screen panels under the pressure of the drilling fluid are more closely adjacent to the vibrating frame of the vibrating screen and even part of the drilling fluid does not leak under them, thereby excluding the situation when the drilling fluid passes without filtering. On the stretched surface of the sieves on the frame sieve panels, due to the claimed design of the frame of the vibrating frame, the drilling fluid is evenly distributed over the entire surface.

In FIG. 1 shows a general view of the frame of the vibrating frame of the vibrating screen with the frame screen panels mounted on it.

In FIG. 2 shows a sectional view of the frame of the vibrating frame of the vibrating screen along a transverse support made with a bend (H).

The frame of the vibrating frame of the vibrating screen (1) shown in FIG. 1 has transverse supports (2), for example, in the amount of five pieces, onto which frame screen panels (3) are mounted on top, for example, four pieces. To fix the frame sieve panels (2) to the frame of the vibrating frame, the vibrating screen (1) has stops (4) located on both sides of the frame of the vibrating frame of the vibrating screen in pairs. Frame sieve panels (2) are mounted on the stops (4) and are fixed on the frame of the vibrating frame of the vibrating screen (1) using, for example, wedges (5). In FIG. 1 conventionally not shown part of the frame sieve panels (3).

A cross section of the frame of the vibrating frame of the vibrating screen (1) along the transverse support (2) is shown in FIG. 2.

The frame screen panel (3), when mounted on the frame of the vibrating frame of the vibrating screen (1) along the edge located on the transverse support (2), adopts the configuration of the transverse support (2). The same curved configuration takes and the canvas frame sieve panel over its entire surface.

As described above, the frame sieve panel (3) is mounted on the frame of the vibrating frame of the vibrating screen (1) by means of stops (4) and wedges (5).

Frames vibroram vibrating screens of the claimed design were manufactured and operated in vibrating screens and sieve-hydrocyclone installations for cleaning drilling fluid from drill cuttings in oil and gas fields.

Vibrorama with the frame of the claimed design was made as follows.

Vibrating screens (1) were attached to the side walls of the vibrating frame, for example, transverse supports (2) were welded. On the transverse supports frame sieve panels (3) are placed, which are pressed against the transverse supports (2) by means of stops (4) and wedges (5). The deflection of the transverse supports was 2.1 mm.

During operation of the vibrating frame, the vibrating screen visually showed that the distribution of the drilling fluid, according to the frame sieve panels fixed to the vibration frame, which, after fixing on the transverse supports, adopted a curved configuration, flowed uniformly across the entire width of the frame screen panels of the vibration frame, even at low costs, thereby ensuring maximum performance when cleaning drilling fluid.

The advantage of the claimed design of the frame vibroscope vibrating screen is:

achieving uniform tension of the screening surface of the frame sieve panels;

simplification of technological operations, both when installing frame sieve panels, and during dismantling;

the possibility of using vibrating frames for vibrating screens for frame sieve panels of various lengths;

improving the efficiency of cleaning drilling fluid from cuttings;

increasing the reliability and durability of frame sieve panels.

Information sources

1. USSR author's certificate for the invention No. 686783 "Sieve".

2. USSR author's certificate for the invention No. 845879 "Device for mesh tension."

3. USSR author's certificate for the invention No. 1694243 "Vibrosieve".

4. USSR author's certificate for the invention No. 1319926 "Device for attaching sieves."

Claims (1)

The vibrating frame frame of the vibrating screen, consisting of a frame with stops and wedges, characterized in that it has transverse supports made with a bend, and the bending of the transverse supports is made in radius and has a height in the center of the support from 2 mm to 10 mm from the horizontal surface, and the transverse ones the supports are located along the length of the frame with equal intervals equal to the width of the frame sieve panels.

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