CN210743608U

CN210743608U - Critical device control rod drive mechanism installing support

Info

Publication number: CN210743608U
Application number: CN201921803155.3U
Authority: CN
Inventors: 罗有为; 梁光远; 罗欣
Original assignee: Nuclear Power Institute of China
Current assignee: Nuclear Power Institute of China
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-06-12
Anticipated expiration: 2029-10-24

Abstract

The utility model discloses a critical device control rod drive mechanism installing support, installing support includes: the device comprises a chassis, a connecting disc, a fixed pipe, a movable pipe, a tight sleeve and a front pulley; the driving mechanism is installed on a connecting disc, a fixing block is arranged on the connecting disc, a first fixing hole is formed in the fixing block, the left end of a fixing pipe is inserted into the first fixing hole, the right end of the fixing pipe is connected with the left end of a movable pipe through a tightening sleeve, the right end of the movable pipe is connected with a front pulley, a rotating shaft is arranged at the bottom of the connecting disc, and the rotating shaft is placed into a bearing of the chassis; the technical problems that an existing mounting bracket is difficult to rotate and inconvenient to maintain are solved, the technical effects that the mounting bracket of the control rod driving mechanism of the critical device can rotate, the length can be adjusted, and the use is convenient are achieved.

Description

Critical device control rod drive mechanism installing support

Technical Field

The utility model relates to a nuclear facility support equipment field specifically relates to a critical device control rod drive mechanism installing support.

Background

The reactor is a device capable of maintaining a controllable self-sustaining chain type nuclear fission reaction so as to realize the utilization of nuclear energy.

The critical device is a physical experimental device which is specially used for carrying out critical experimental measurement on various arrangement modes and compositions of nuclear fuel and other materials forming the reactor core in the design stage, determining the critical characteristics of the nuclear fuel and other materials and providing basis for checking theoretical calculation.

The reactor control rod is a device which is made of a material easy to absorb neutrons and used for controlling the chain reaction rate, and the control rod is driven by a control rod driving mechanism to move in a guide tube.

The control rod drive mechanism (hereinafter referred to as drive mechanism) achieves the following functions: the control rod can freely run in the full-drive stroke range, the rod holding is reliable, and the phenomena of incapability of lifting, stepping out and clamping the rod caused by the control rod drive mechanism are not allowed to occur; the control rod stopping function can be executed within the operating condition range of the equipment, the control rod at any stroke position or in lifting motion can be made to perform emergency shutdown and rod falling, and the phenomena of rod stagnation and rod clamping caused by the control rod driving mechanism are not allowed to occur.

The critical device control rod driving mechanism adopts a steel wire rope to control the control rod, and the driving mechanism is arranged outside the reactor enclosure barrel and annularly distributed at the top of the reactor enclosure barrel. The driving mechanism mounting bracket (hereinafter referred to as mounting bracket) is arranged on the ground of the critical device reactor hall, connects the ground with the control rod driving mechanism, provides stable support for the driving mechanism, and simultaneously guides the control rod above the appointed grid cell by using the cantilever of the mounting bracket. In the design process, the existing control rod drive mechanism mounting bracket has the following defects:

(1) the existing control rod driving mechanism mounting bracket equipment is made of 35# carbon steel, and although the carbon steel is fully and perfectly maintained in the long-term use process, the oxidation phenomenon is inevitably generated due to the material characteristics of the carbon steel.

(2) The existing control rod drive mechanism mounting bracket equipment is difficult to rotate left and right.

SUMMERY OF THE UTILITY MODEL

The utility model provides a critical device control rod drive mechanism installing support has solved the rotatory difficulty of current installing support, has maintained the inconvenient technical problem of maintenance, has realized that critical device control rod drive mechanism installing support can rotate, and length can adjust convenient to use's technological effect.

In order to realize the above utility model purpose, this application provides a critical device control rod drive mechanism installing support, installing support includes:

the device comprises a chassis, a connecting disc, a fixed pipe, a movable pipe, a tight sleeve and a front pulley; actuating mechanism installs on the connection pad, is equipped with the fixed block on the connection pad, is equipped with first fixed orifices on the fixed block, and fixed pipe left end inserts in the first fixed orifices, fixed pipe right end passes through tight cover with the expansion pipe left end is connected, the right-hand member of expansion pipe is connected and is connected with the front pulley, and there is the pivot connection pad bottom, and the pivot is put into in the bearing on chassis.

Preferably, the mounting bracket is mounted on a steel platform.

Preferably, the chassis is connected to the steel platform by bolts.

Preferably, the connecting disc is provided with a screw hole and is connected with the driving mechanism through a bolt.

Preferably, a steel wire rope of the driving mechanism is sleeved on the front pulley.

Preferably, the tight sleeve is sleeved on the outer surface of the right end of the fixed pipe, the left end of the movable pipe is inserted into the right end of the fixed pipe, and the tight sleeve is provided with a screwing bolt.

Preferably, the fixed pipe with all be equipped with a plurality of second fixed orificess on the movable tube, the staple inserts fixed pipe with second fixed orificess on the movable tube is right fixed pipe with the connection of movable tube is fixed.

Preferably, the chassis, the connecting disc, the fixed pipe and the movable pipe are all made of stainless steel.

The driving mechanism of the critical device adopts a steel wire rope to control the control rod to lift, and the steel wire rope suspends the control rod and extends into the guide tube. Because wire rope is comparatively soft, the installing support not only provides undetermined reliable's support for actuating mechanism, still need provide the guide effect for wire rope: the mounting bracket can rotate left and right, and the control rod can enter the designated grid cell by matching with the telescopic cantilever of the mounting bracket.

One or more technical solutions provided by the present application have at least the following technical effects or advantages:

the utility model provides a critical device control rod drive mechanism installing support is the stainless steel with the material adjustment, simplifies the structure, and stability is better.

The utility model provides a critical device control rod drive mechanism installing support increases the bearing in the bottom, makes the rotation process more convenient.

The utility model increases the bearing to make the mounting bracket rotate conveniently by adjusting the mounting bracket structure; the material of the mounting bracket is adjusted to be stainless steel, so that the corrosion resistance of the equipment is improved, and the maintenance is more convenient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention;

FIG. 1 is a schematic structural view of a critical apparatus control rod drive mechanism mounting bracket of the present application;

fig. 2 is a schematic structural view of the tight sleeve in the present application.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and the scope of the present invention is not limited by the specific embodiments disclosed below.

Referring to FIG. 1, the present application provides a critical apparatus control rod drive mechanism mounting bracket comprising:

the device comprises a chassis, a connecting disc, a fixed pipe, a movable pipe, a tight sleeve and a front pulley; actuating mechanism 1 installs on connection pad 2, is equipped with fixed block 3 on the connection pad, is equipped with first fixed orifices on the fixed block, and 4 left ends of fixed pipe insert in the first fixed orifices, fixed pipe right-hand member end passes through tight cover 5 with 6 left ends of movable tube are connected, the right-hand member of movable tube is connected and is connected with front pulley 7, and there is pivot 8 connection pad bottom, and the pivot is put into in the bearing 10 on chassis 9.

Referring to fig. 2, the tight sleeve is sleeved on the outer surface of the right end of the fixed pipe, the left end of the movable pipe is inserted into the right end of the fixed pipe, and the tight sleeve is provided with a screwing bolt 11.

The design content of the mounting bracket is as follows:

(1) the driving mechanism mounting bracket works at normal temperature and normal pressure.

(2) The mounting bracket is arranged on a +3.0m steel platform.

(3) The equipment is connected with the ground and the driving mechanism and is connected with the platform by using bolts, the ground right below the bottom of the equipment is reinforced by a steel plate with the thickness of 20mm, and a fulcrum is stable and reliable; the bolt is connected with the driving mechanism, so that the maintenance work of each device is convenient to carry out.

(4) The mounting bracket mainly comprises a chassis, a connecting disc, a fixed pipe, a movable pipe, a tightening sleeve, a front pulley and the like.

(5) In order to meet the requirement of the multi-grid element layout of the critical experiment, the equipment can rotate left and right. The bottom of the connecting disc is provided with a rotating shaft, and the rotating shaft is placed in a bearing of the chassis, so that the purpose of free rotation can be realized.

(6) The driving mechanism uses a steel wire rope to control the control rod to move, and due to the soft characteristic of the steel wire rope, the mounting bracket needs to provide a cantilever so as to hoist the control rod above a specified grid cell, and the cantilever can extend and retract so as to meet the multi-grid cell layout requirement of a critical experiment. The adjusting range of the telescopic cantilever is about 1065 mm-1860 mm, and the control rod can be positioned to the center of the core.

(7) In order to meet the requirement of long-term stable operation, the main material of the equipment is stainless steel. The stainless steel 304 is adopted at the part with smaller stress, the material has wide application, mature processing and welding processes and easy quality control; the stainless steel 30Cr13 is adopted at the part with larger stress, the material has high strength, and the equipment can be effectively ensured not to deform in long-term use.

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A critical apparatus control rod drive mechanism mounting bracket, the mounting bracket comprising:

the device comprises a chassis, a connecting disc, a fixed pipe, a movable pipe, a tight sleeve and a front pulley; actuating mechanism installs on the connection pad, is equipped with the fixed block on the connection pad, is equipped with first fixed orifices on the fixed block, and fixed pipe left end inserts in the first fixed orifices, fixed pipe right-hand member passes through tight cover with the movable tube left end is connected, the right-hand member of movable tube is connected and is connected with the front pulley, and there is the pivot connection pad bottom, and the pivot is put into in the bearing on chassis.

2. The critical apparatus control rod drive mechanism mounting bracket of claim 1, wherein the mounting bracket is mounted on a steel platform.

3. The critical apparatus control rod drive mechanism mounting bracket of claim 2, wherein a chassis is connected to the steel platform by bolts.

4. The critical apparatus control rod drive mechanism mounting bracket of claim 1 wherein the interface disc has a threaded hole and the interface disc is connected to the drive mechanism by a bolt.

5. The critical apparatus control rod drive mechanism mounting bracket of claim 1, wherein a drive mechanism wire rope is sleeved over the front pulley.

6. The critical apparatus control rod drive mechanism mounting bracket of claim 1, wherein a tightening sleeve is disposed on an outer surface of a right end of the fixed tube, a left end of the movable tube is inserted into a right end of the fixed tube, and a tightening bolt is disposed on the tightening sleeve.

7. The critical control rod drive mechanism mounting bracket of claim 1, wherein the stationary tube and the movable tube each have a plurality of second securing holes therein, and wherein a securing pin is inserted through the second securing holes in the stationary tube and the movable tube to secure the connection between the stationary tube and the movable tube.

8. The critical apparatus control rod drive mechanism mounting bracket of claim 1, wherein the base plate, the connecting disc, the fixed tube and the movable tube are made of stainless steel.