CN2145918Y

CN2145918Y - Replaceable boiler and its outer shell dual-layer fire grate

Info

Publication number: CN2145918Y
Application number: CN 93204096
Authority: CN
Inventors: 李玉泉; 楼西贞
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-02-20
Filing date: 1993-02-20
Publication date: 1993-11-10
Anticipated expiration: 2003-02-20

Abstract

The utility model is that on the basis that dual-layer fire grate structure of an original boiler shell type boiler doesn't change, both ends of the pipe bundle 3 of the fire grates are respectively connected with a front collecting box 1 and a rear collecting box 4 in replaceable way (a flange and a screw thread). Thus, the utility model ensures the normal circulation of the water system of the boiler and is convenient for users maintaining or replacing the fire grates of the boiler. The utility model has the advantages of simple structure, easy fabrication and low cost.

Description

Replaceable boiler and its outer shell dual-layer fire grate

The utility model belongs to a kind of interchangeable double storied boiler fire grate in combustion apparatus field.

The used double-layer grate of general smaller hard flour pancake boiler is divided into two-layer up and down, and lower floor is the plain cast iron fire grate, and the upper strata is that welding is fixed between water-cooled grate and flue in conventional structure in order to the hollow water-cooled grate of realization stove water inner loop.Because in use water quality can not be pure, so fouling can occur inevitably in the pipe, becomes the obstacle of heat transfer.Usually the thermic load at fire grate place is the highest in the boiler, influences when conducting heat when serious fouling in the water-cooled grate tube bank, and water-cooled grate will burn out because of overheated.For this reason, ought to often implement snaking, maintenance and replacing for the water-cooled grate tube of boiler.But because the prior art structure is to carry out snaking by the set hand hole of boiler shell, in-tube fouling is difficult to pass through mechanical removal; Again because of water-cooled grate tube bank and flue are that weldering is dead,, must cut body of heater open and keep in repair or cut off endless tube and change in case damage, complex process not only, and expense is higher, boiler damage is also gone up very generally all, has all caused great difficulty and waste to the user.

The purpose of this utility model is to overcome the above-mentioned defective of prior art, and then a kind of simple in structure, replaceable boiler outer shell boiler double-layer grate of being easy to snaking, maintenance and replacing is provided.

The purpose of this utility model realizes in the following way: on the double-layer grate structure basis of invariable of original smaller hard flour pancake boiler, with the two ends of fire grate tube bank respectively with forward and backward collection case, carried out dismountable (flange and screw thread) and be connected, so both guaranteed the normal circulation of boiler water system, realized again the intrafascicular any purpose that water-cooled grate tube carries out snaking, maintenance and replacing of water-cooled grate tube.

Below with reference to accompanying drawing embodiment of the present utility model is further described.

Fig. 1 is the scheme of installation of the utility model side-looking structure.

Fig. 2 is the vertical view of Fig. 1.

Fire grate described in the utility model is made of forward and backward collection case 1,4 and double-layer grate tube bank 3 etc., wherein water-cooled grate tube bank 3 sleeve pipes 6 that are welded between inside of boiler and the shell by a pair are inserted in the body of heater, one end of fire grate tube bank 3 is threaded with rear set box 4, and the other end and preceding collection case 1 are connected by adpting flange.Label 5 is the rear set box outlet pipe in the accompanying drawing; 7 is preceding collection case water inlet pipe adpting flange; 8 is the fire clay filler.

In actual use, as need a certain water-cooled grate tube in the fire grate changed or keeped in repair, its working procedure is as follows:

1. remove the bolt on the adpting flange 2 and 7, fire grate tube bank 3 is broken away from each other with preceding collection case 1;

2. the inhour rotation needs certain root water-cooled grate tube 3 of replacing or maintenance, realizes the disengaging of 4 of this pipe 3 and rear set box;

3. replace with new water-cooled grate pipe fitting or load onto the water-cooled grate tube of having fixed already again;

4. stop up in the slit of fire clay 8 between sleeve pipe 6 and water-cooled grate tube 3.

Claims

The double-layer grate that a kind of smaller hard flour pancake boiler is used, by forward and backward collection case (1,4) and double-layer grate tube bank formations such as (3), it is characterized in that the water-cooled grate tube bank (3) in the fire grate is inserted in the body of heater by the sleeve pipe (6) that a pair is welded between inside of boiler and the shell, one end of this fire grate tube bank (3) is threaded with rear set box (4), and the other end is connected by adpting flange with preceding collection case (1).