SU1247625A1 - Unit for securing stiffening band with gas-tight box of boiler screen - Google Patents

Description

ten

1247625

The invention relates to a power system, namely to boiler units, and can be used in metal structures of boilers.

The aim of the invention is to increase the reliability when making a gas-tight box of boiler screens with beveled corners.

FIG. 1 shows gas-tight - - and

box and on with stiffness, horizontal section; FIG. 2 shows the node I in FIG. 1J and FIG. 3 shows the kinematic scheme of the assembly in cold and working conditions. The fastening unit with a gas-tight box of boiler screens contains rods 1 and 2 mounted at an angle I and y to the plane, respectively, cTertoK 3 and 4 of the core and hinge connected by one ends with beams 5 and 6 in accordance with rigidity, and the other through a joint hinge 7 and an intermediate device made in the form of mounting links 8 and 9 with walls 3 and 4, with the mounting links 8 and 9 being fixed. common hinge 7 on the line the intersection of the walls 3. and 4 in working condition, and the length I, and f and the angles of the ultrasonic and the installation of rods in a cold state are determined from the ratios

15

coal

5 and 14 5 Article de

20 2 with

It runs 25 AZ rivers

from art. 30 pa 3

de and I

a4. (,

 and 1-2 is the length of the rods 1 and 2;

 and y - the angles of installation of the rods 1 and 2 to the plane of the walls 3 and 4, respectively;

thermal deformations of the bevelled corners of the box with a length of K and ty.,. ,, along walls 3 and 4, respectively;

and u

ac.c

D & D - thermal deformations

walls 3 and 4, having a length Lg and L, respectively.

Walls 3 and 4 are connected in a beveled corner by screen 10.

Rods 1 and 2 are connected to beams 5 and 6 by hinges 11 and 12, and link 8 and 9 with walls 3 and 4 by hinges 13, 14, respectively. In addition, the beam 5 is connected in several places with the wall 3 by sliding supports 15 supporting the same distance between the beam 5 and the wall 3, equal to j. in all temperature states of the walls. Similarly, all the beams are connected with the corresponding walls.

In the cold state, the rods 1 and 2 are set at an angle p and respectively to the walls 3 and 4.

When the walls 3 and 4 are heated to the working state, the wall 3 moves by the value of l due to expansion of the wall 4 and the screen 10, - and the wall 4 - by the value of AZ, respectively. In this case, the hinge 7 is installed on the intersection line of the planes of the walls 3 and 4, and the rods 1 and 2 rotate around the hinge 7 and are also installed in the plane of the walls 3 and 4.

The beams 5 and 6 move together with the walls 3 and 4 by the values Л „and

4 respectively. In this case, the rotation of the rods 1 and 2 by the angle and t, respectively, as well as the movement of the hinge 7 to the line of intersection of the planes of the walls 3 and 4, ensure the movement of the ends of the beams 5 and 6 also

D and L, respectively.

which eliminates the appearance of bending moments in beams 5 and 6 when the temperature state of a gas-dense box of shields changes; the boiler.

The assembly of rigidity in combination with a gas-tight box of boiler screens reduces the stresses in the beams and the load 1, and reliability when making a gas-tight box with bevelled corners.

m.

/ 3

Phi. g

Editor A. Dolynich Order 4107/36

Fi9 .- $

Compiled by Y. Nesterov

Tehred And Popovich Proofreader M. Demchik

Circulation 398 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

RIGID BELT FASTENING ASSEMBLY UNIT WITH A GAS-DENSE SCREEN BOX i BOILER containing rods mounted at an angle to the plane of the box walls and pivotally connected at one end to the stiffener beams and the other through a common hinge and intermediate device to the box walls, characterized in that, with In order to increase reliability when making a gas-tight box of boiler screens with tapered corners, the intermediate device is made in the form of mounting links fixing a common hinge at the line of intersection of the box walls in ochem state and hingedly connected to .poslednimi and ki rods of redelyayutsya 4 daz: length and installation angles. : cold state op-> ί ratios g _____. _r ² - ₂ '+ < _t . _d, ^2nd s <M ET ^and a ^{+ fl} er-3 4 ⁺ v · d _(chch.a. 'where & chch.a arc sin -A ⁴¹ - <· arc sin ^{k + d} e ² t <. - the length of the rods located along the planes of the corresponding steaks 3 and 4 boxes; - the installation angles of the rods of length t _t and to the planes of the corresponding walls 3 and 4 of the box; - thermal deformation of the beveled corners of the box along the walls 3 and 4, respectively; - thermal deformation of walls 3 and 4, respectively. * 1247625