CN105673951A

CN105673951A - Laying device for sodium channel

Info

Publication number: CN105673951A
Application number: CN201610040674.3A
Authority: CN
Inventors: 刘靖; 朱皓; 张喜梅; 董升国; 谢正
Original assignee: China Institute of Atomic of Energy
Current assignee: China Institute of Atomic of Energy
Priority date: 2016-01-21
Filing date: 2016-01-21
Publication date: 2016-06-15
Anticipated expiration: 2036-01-21
Also published as: CN105673951B

Abstract

The invention discloses a laying device for electric heating elements and thermocouples of a through-wall sodium channel in a sodium-cooled fast reactor. The laying device comprises a guide rod and a limiting and fixing device fixed through the guide rod. The limiting and fixing device is of an outer buckle type structure and comprises frames and limiting units. Each limiting unit is mainly composed of a base, a spring, a roller shaft, a roller wheel, a guide groove and a C-type ring, wherein the base is fixed to the corresponding frame; the C-type ring is fixed to the inner side of the guide groove; the roller wheel makes elastic contact with the guide groove; the spring enables the distance between the base and the roller shaft to be within a certain range; the roller wheel can freely roll on the guide groove in the guide direction and is connected to the base through the roller shaft. By means of the laying device, the electric heating elements, the thermocouples and other components can be evenly arranged along the sodium channel in a through-wall mode, make reliable contact in the whole course, and are convenient to detach.

Description

A kind of laying apparatu of sodium channel

Technical field

The invention belongs to reactor engineering technical field, particularly to a kind of laying apparatu for sodium channel electrical heating elements through walls in sodium-cooled fast reactor and thermocouple.

Background technology

Existing sodium-cooled fast reactor sodium channel through walls is by the restriction of civil engineering condition, working place is extremely narrow, cannot be carried out the laying installation of electrical heating elements and thermocouple work, but if sodium channel through walls does not install electrical heating elements, the blocking even causing sodium loop on the low side of this segment pipe temperature can be caused. Sodium channel through walls have employed prior art Fig. 1 shown device and method is heated and thermometric, rustless steel thin slice is pressed pipeline outer wall size rolls circlewise by this device, then electrical heating elements is fastened outside ring plate, thermocouple for measuring temperature is fixed in ring plate in the lump, finally electrical heating elements, thermocouple and ring plate is together stretched into along pipeline and completes inside body of wall to lay. This device can improve the problem that sodium channel electrical heating power through walls is not enough to a certain extent, but there is also many deficiencies:

1., for ensureing that rustless steel ring plate can stretch in body of wall smoothly, it is necessary to leave space between rustless steel ring plate and tube wall, after installation, be affected by gravity between ring plate and tube wall only having top is contact, and the efficiency of heating surface is low.

2. the electrical heating elements of body of wall inside pipeline is that winding is laid, and the electrical heating elements of wall outer side pipeline is straight laying, and two sections of electrical heating elements are independent of one another, and heating uniformity is affected; Two sets control loops need to be set and control the heating of inside and outside side ducts respectively, add system scale and equipment investment cost.

Summary of the invention

(1) goal of the invention

Instant invention overcomes the deficiencies in the prior art, it is provided that one can realize the parts such as electrical heating elements, thermocouple and be evenly arranged along sodium channel is through walls, omnidistance reliable contacts, the laying apparatu of convenient disassembly.

(2) technical scheme

In order to solve the problem existing for prior art, technical scheme provided by the invention is as follows:

The laying apparatu of a kind of sodium channel includes guide post, limiting and fixing device, limiting and fixing device is fixed by guide post, it is critical only that, limiting and fixing device is exterior buckle type structure, including framework and position-limiting unit, position-limiting unit is mainly by pedestal, spring, roller bearing, roller, gathering sill, C-shaped ring forms, pedestal is fixed on framework, C-shaped ring is fixed on inside gathering sill, roller and gathering sill are Elastic Contact, spring makes the distance between pedestal and roller bearing movable within the specific limits, roller freely can roll along guide direction on gathering sill, roller is connected on pedestal by roller bearing.

Further, the as described above framework that exterior buckle type limiting and fixing device is two semicircular structures adopts the mode of hollow hinge to link together, and is fixed by bolt.

Further, C-shaped ring as described above is fixed on gathering sill by spot welding.

Further, C-shaped ring length as described above is 10mm-20mm.

Further, inside gathering sill as described above, one C-shaped ring is set every 100mm-200mm.

(3) beneficial effect

Present configuration is compact, installation and removal are simple, greatly facilitates laying and changing electrical heating elements or thermocouple. This device makes electrical heating elements and thermocouple with pipeline laminating closely, achieve reliably laying of body of wall internal pipeline electrical heating elements and thermocouple, the heating efficiency of electrical heating elements can be played completely, reflect tube wall temperature true and reliablely, prevent the generation of pipeline cold spot, sodium channel is avoided to block, it is ensured that the stable operation of sodium loop. In body of wall, outside electrical heating elements is without separating, in pipeline heating power, outside is consistent, ensure that the uniformity of heating preferably, adopts a set of control loop can electrical heating elements be controlled, decrease the quantity controlling loop so that economy is also improved.

Accompanying drawing explanation

The existing sodium channel electrical heating elements laying apparatu schematic diagram through walls of Fig. 1

The structural representation of Fig. 2 laying apparatu

The structural side view of Fig. 3 laying apparatu

Fig. 4 position-limiting unit structural representation

Fig. 5 gathering sill and C-shaped ring and electrical heating elements installation diagram

1 guide post, 2 frameworks, 3 bolts, 4 position-limiting units, 5 pedestals, 6 springs, 7 roller bearings, 8 rollers, 9 gathering sills, 10C type ring, 11 electrical heating elements or thermocouple

Detailed description of the invention

Below in conjunction with specification drawings and specific embodiments, the present invention is further elaborated.

A kind of laying apparatu of sodium channel, as shown in Figure 2,3, this device includes guide post 1, limiting and fixing device, and wherein limiting and fixing device is exterior buckle type structure, adopted the mode of hollow hinge to connect and compose by the framework 2 of two semicircular structures, and carry out position fix by guide post 1. The framework 2 of two semicircular structures is fixedly connected by bolt 3, fixing connection position-limiting unit 4 on framework 2, it is illustrated in figure 4 the structural representation of position-limiting unit 4, mainly it is made up of pedestal 5, spring 6, roller bearing 7, roller 8, gathering sill 9, C-shaped ring 10, wherein C-shaped ring 10 is fixed on gathering sill 9 by spot welding, and gathering sill 9 is rigid metal, and C-shaped ring 10 length is 10mm-20mm, inside gathering sill 9, one C-shaped ring 10 is set every 100mm-200mm, as shown in Figure 5; Roller 8 and gathering sill 9 are Elastic Contact, spring 6 makes the distance between pedestal 5 and roller bearing 7 movable within the specific limits, the elastic force of spring 6 calculates according to the distance of sodium channel Yu laying apparatu, ensure moderate pressure, make device radially electrical heating elements or thermocouple 11 can be had enough pressure at pipeline again along guide post 1 axial translation, thus ensureing electrical heating elements or thermocouple 11 and tube wall whole process reliable contacts; Roller 8 freely can roll along guide direction on gathering sill 9, and roller 8 is connected on pedestal 5 by roller bearing 7.

Limiting and fixing device can according to heating or thermometric need multiple position-limiting unit 4 is set, in the C-shaped ring 10 of position-limiting unit 4, electrical heating elements or thermocouple 11 can be installed, position-limiting unit 4 for electrical heating elements 11 need to be uniformly distributed along framework 2 cambered surface, for the position-limiting unit 4 of thermocouple 11, then it is positioned at any two groups of centre positions for the position-limiting unit 4 of electrical heating elements 11.Outside gathering sill 9, one limiting and fixing device is set every 200mm 300mm. Gathering sill 9 main body is rigid metal, and its material of all parts is respectively provided with good radiation hardness and resistance to elevated temperatures.

The using method of this device is as follows:

1. the electrical heating elements that need to stretch in body of wall or thermocouple 11 are arranged in C-shaped ring 10, electrical heating elements or the straight placement of thermocouple 11 must be ensured, as shown in Figure 5; Can placing electrical heating elements or thermocouple 11 in C-shaped ring 10, electrical heating elements or thermocouple 11 can be played constraint and fixation by C-shaped ring 10 so that electrical heating elements or thermocouple 11 can axially retain straight along pipeline inside body of wall;

2. it is directed to groove 9 axially stretch in body of wall along pipeline together with electrical heating elements or thermocouple 11, ensure that it is parallel with pipeline as far as possible, the particular location installed can carry out labelling in advance on pipeline, many groups gathering sill 9 for fixing electrical heating elements 11 must be evenly arranged on tube wall, and the list group gathering sill 9 for fixing thermocouple 11 is positioned at the centre position of two adjacent groups electrical heating elements 11 gathering sill 9. After installation, gathering sill 9 is fixed in wall outer side part metal clip;

3. limiting and fixing device is buckled on fixing gathering sill 9, it is ensured that reliable contacts shown in Fig. 4 pressed by position-limiting unit 4 and gathering sill 9, bolt 3 is screwed, guide post 1 inserts hinge hollow part;

4. limiting and fixing device and guide post 1 are axially pushed inside body of wall along pipeline, first group of limiting and fixing device pushes bosom, follow-up limiting and fixing device pushes outer position successively, adjacent limiting and fixing device spacing is between 200mm 300mm, all limiting and fixing devices are both needed to before pushing body of wall hinge hollow part is inserted guide post 1, it is ensured that the installation site of all limiting and fixing devices is consistent and can reduce the frictional resistance pushing body of wall process.

Obviously; the above embodiments are to better explain the present invention; rather than the restriction to the claims in the present invention protection domain; if those skilled in the art is according to the design of the present invention; the equivalent structure transformation utilizing description of the present invention and accompanying drawing content to make, falls within the scope that the present invention is claimed.

Claims

1. the laying apparatu of a sodium channel, including guide post, limiting and fixing device, limiting and fixing device is fixed by guide post, it is characterized in that, limiting and fixing device is exterior buckle type structure, mainly it is made up of framework and position-limiting unit, position-limiting unit is mainly made up of pedestal, spring, roller bearing, roller, gathering sill, C-shaped ring, pedestal is fixed on framework, C-shaped ring is fixed on inside gathering sill, and roller and gathering sill are Elastic Contact, and roller freely rolls along guide direction on gathering sill, spring is between pedestal and roller bearing, and roller is connected on pedestal by roller bearing.

2. the laying apparatu of a kind of sodium channel according to claim 1, it is characterised in that the described framework that exterior buckle type limiting and fixing device is two semicircular structures adopts the mode of hollow hinge to link together.

3. the laying apparatu of a kind of sodium channel according to claim 1, it is characterised in that described exterior buckle type limiting and fixing device is fixed by bolt.

4. the laying apparatu of a kind of sodium channel according to claim 1, it is characterised in that described C-shaped ring is fixed on gathering sill by spot welding.

5. the laying apparatu of a kind of sodium channel according to claim 1, it is characterised in that described C-shaped ring length is 10mm-20mm.

6. the laying apparatu of a kind of sodium channel according to claim 1, it is characterised in that inside described gathering sill, one C-shaped ring is set every 100mm-200mm.