RU135739U1 - DEVICE FOR NON-DESTRUCTIVE CONTROL OF THE PUMP HOUSING-SNAIL (OPTIONS) - Google Patents

Abstract

1. A non-destructive testing device for the pump snail body, comprising an optical device for scanning, characterized in that the device comprises an electric drive assembly for moving, a vertical rod mounted inside the pump snail body in the connector of the pump dismountable part and connected to the electric drive unit, a mounting plate, on which the electric drive unit is located, mounted on the connector of the pump disassembled part and having an opening for the movement of the vertical rod, the horizontal rod is rigidly connected th vertical rod at 90 °, wherein the optical scanning device is fixed on a horizontal shtange.2. The device according to claim 1, characterized in that the drive for moving the system includes a device for counting coordinates. A device for non-destructive testing of a pump housing-snail, comprising an optical device for scanning, characterized in that the device comprises a vertical rod installed inside the pump housing-snail in a connector of a pump dismountable part, a vertical rod mounting device connected to the cargo crane from above, a horizontal rod, is rigidly connected to a vertical rod at an angle of 90 °, while an optical scanning device is mounted on a horizontal rod, balanced by an adjustable counter ECOM.

Description

The utility model relates to non-destructive testing devices, and more particularly, to non-destructive testing devices of the pump casing-snail and can be used, in particular, for non-destructive testing of the casing-snail of the main circulation pump at a nuclear power plant.

There is a device selected as a prototype (Japanese patent JP4844380 (B2), F04D 13/00, F04D 29/60) in which a device comprising a long flexible endoscope is used to control a pump housing with a vertical shaft. For the introduction of the endoscope, a special connector is provided in the upper part of the pump housing. For control, the dismantling of the extraction part of the pump is not required.

The prototype has the following disadvantages:

1. The proposed access path of the device does not allow for detailed monitoring of the entire inner surface of the pump casing due to the complexity of organizing a scan of the entire internal cavity by a flexible endoscope.

2. If there is water in the pump housing, inspection is difficult due to the buoyant force acting on the endoscope. When monitoring the snails of the main circulation pumps for technological reasons, they can be filled with water.

The objective of the proposed utility model is:

1. Improving the accuracy and efficiency of monitoring the entire inner surface of the pump housing.

2. The expansion of the capabilities of the device non-destructive testing of the inner surface of the pump housing.

The solution to this problem is provided by the fact that the non-destructive testing device of the pump casing-snail, containing an optical scanning device delivered inside the pump casing-snail, in the first embodiment, contains an electric drive assembly for moving, a vertical rod installed inside the pump’s snail in the dismountable connector parts of the pump and connected to the drive unit, a mounting plate, on which the drive unit is located, mounted on the connector of the dismantled part of the pump and and eyuschuyu opening for rods vertical movement, horizontal bar rigidly connected to a vertical rod at an angle of 90 degrees, the optical scanning device is fixed on the horizontal rod. In addition, a distinctive feature is that the drive of the mechanical movement of the system includes a device for measuring coordinates in order to accurately determine the location of the detected defects. In the second embodiment, the device comprises a vertical rod mounted inside the pump casing-snail in the connector of the pump dismountable part, a vertical rod mounting device connecting from above with a cargo crane, a horizontal rod rigidly connected to a vertical rod at an angle of 90 degrees, while on a horizontal rod an optical scanning device is mounted balanced by an adjustable counterweight.

The utility model is illustrated by drawings.

The figure 1 shows a diagram of the device according to the first embodiment and the casing-snail of the main circulation pump after dismantling the removable part of the pump.

The figure 2 shows a diagram of the device according to the second embodiment, the casing-snail of the main circulation pump after dismantling the withdrawal part of the pump and a cargo crane for supplying a rigid structure of the device.

Designation of positions in the figures:

1 - electric drive unit;

2 - connection of vertical and horizontal rods;

3 - optical device;

4 - housing (pump snail);

5 - counterweight;

6 - mounting plate;

7 - mounting device.

The device according to the first embodiment (Fig. 1) contains an electric drive unit (1) for moving the device inside the pump casing (4), the connection of two rods (2), representing a horizontal rod, rigidly connected to a vertical rod at an angle of 90 degrees, in this case, a vertical rod is installed inside the pump casing (4) in the connector of the pump part to be dismantled and connected to the drive unit (1), the optical device (3) for scanning, the mounting plate (6) on which the drive unit is located odov (1) mounted on the connector part demountable pump and having an opening for the vertical motion of the rod. The drive of mechanical movement of the system may include a device for counting coordinates.

In the second embodiment (Fig. 2), the device comprises a connection of two rods (2), representing a horizontal rod, rigidly connected to a vertical rod at an angle of 90 degrees, on top of which there is a mounting device (7) for connecting the proposed device to the cargo rail, which represents a plate with a hole and four eyebolts, for which the plate can be attached to a cargo crane, while a vertical rod is installed inside the pump’s coils (4) in the connector of the pump’s dismantled part, optical stroystvo scanning (3) fixed to the horizontal rod, and a counterweight (5) an optical device mounted on a horizontal rod and balancing the optical device (3).

The device operates as follows.

To control the housing (cochlea) (4) of the main circulation pump, the removal part of the pump itself is disassembled. A mounting plate (6) is installed on the pump housing (snail) connector, in which there is a hole through which, using the electric drives installed on it (1), a vertical rod is moved, rigidly fixed at an angle of 90 with a horizontal rod (2); on which is mounted an optical device for scanning (3) (see figure 1).

The control of the housing (cochlea) of the main circulation pump is carried out by scanning the entire surface of the main circulation pump. To ensure scanning, the vertical bar is lowered from top to bottom. Scanning is carried out along an annular trajectory, from top to bottom with a step that provides overlapping of the field of view of the optical device (3). To carry out high-resolution control, the optical device (3) can approach the pump casing (snail) (4) by horizontally moving the connection of two rods (2) with an electric drive (1). The system movement drive includes a device for counting coordinates in order to accurately determine the locations of identified defects.

In the second embodiment (see Fig. 2), the fastening device of the vertical bar (7) is connected to the cargo crane, and the optical device (3), mounted on a horizontal bar, is balanced using an adjustable counterweight (5). Next, the vertical and rigidly connected horizontal rod (2) is delivered to the control point by a cargo crane and, during the control, is left suspended on a cargo crane. To ensure scanning, the device is lowered by a cargo crane from top to bottom, and the device can be moved by a cargo crane horizontally and along an annular path.

The use of the utility model will increase the accuracy and efficiency, as well as expand the capabilities for monitoring the internal surface of the pump casing (scroll) due to the fact that:

1. It is possible to monitor the entire inner surface of the casing (scroll) of the main circulation pump by scanning along a path that provides coverage of the entire inner surface of the casing (scroll) of the pump, because a control device with the possibility of translational and rotational movement is used;

2. It is possible to maintain a constant predetermined distance (within a certain tolerance) from the lens of the optical device to the inner surface of the pump for a constant optical image scale, which allows to identify cracks and defects with predetermined geometric parameters;

3. Provides control with high resolution, due to the fact that the device can move from the axis of the pump housing to its inner surface.

The use of the utility model will also allow non-destructive testing of the internal surface of the pump under water, which is ensured by rigid fixation of the system nodes.

Currently, the device is being prepared for use at nuclear power plants.

Claims (3)

1. A non-destructive testing device for the pump snail body, comprising an optical device for scanning, characterized in that the device comprises an electric drive assembly for moving, a vertical rod mounted inside the pump snail body in the connector of the pump dismountable part and connected to the electric drive unit, a mounting plate, on which the electric drive unit is located, mounted on the connector of the pump disassembled part and having an opening for the movement of the vertical rod, the horizontal rod is rigidly connected th vertical rod at 90 °, wherein the optical scanning device is fixed on the horizontal rod. 2. The device according to claim 1, characterized in that the drive for moving the system includes a device for counting coordinates. 3. A device for non-destructive testing of a pump housing-snail, comprising an optical scanning device, characterized in that the device comprises a vertical rod mounted inside the pump housing-snail in a connector of a pump dismountable part, a vertical rod mounting device connected to the cargo crane from above, a horizontal rod rigidly connected to a vertical rod at an angle of 90 °, while an optical scanning device is mounted on a horizontal rod, balanced by an adjustable oats.

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