CN102380715B

CN102380715B - Method for assembling conical seat of gas cooler

Info

Publication number: CN102380715B
Application number: CN 201010599364
Authority: CN
Inventors: 傅育文; 王继宁
Original assignee: Shanghai Boiler Works Co Ltd
Current assignee: Shanghai Boiler Works Co Ltd
Priority date: 2010-12-22
Filing date: 2010-12-22
Publication date: 2013-06-26
Anticipated expiration: 2030-12-22
Also published as: CN102380715A

Abstract

The invention discloses a method for assembling a conical seat of a gas cooler. The method comprises the following steps of: vertically arranging a shell ring on three equal-height sizing blocks, and welding four positioning plates on the shell ring; machining a small mouth of which the diameter is 1-3 millimeters greater than the outer diameter of the shell ring for the shell ring, machining a large mouth of the conical seat, forming a plane, welding three lifting lugs on an end face; laying the large mouth of the conical seat on the ground upwardly, heating the small mouth of the conical seat and an adjacent region to 180-250 DEG C with an electric infrared plate, soaking for 10-15 minutes, putting the conical seat into the shell ring, and cooling to the normal temperature; and manually welding a welding seam between the shell ring and the inner wall of the conical seat, performing back chipping by machining the welding seam from the outer wall on a vertical lathe, and welding the welding seam on the outer wall by adopting union melt welding. By adopting the assembling method provided by the invention, the requirement of concentricity between the conical seat and the shell ring can be ensured, the production efficiency is increased greatly, and the production and manufacturing costs are reduced effectively.

Description

A kind of assembly method of conical seat of gas cooler

Technical field

The present invention relates to a kind of assembly method of mechanical part, particularly a kind of assembly method of conical seat of gas cooler.

Background technology

At present, in integrated gasification combined cycle for power generation system (Integrated Gasification Combined Cycle is called for short IGCC), the assembly method of its conical seat of gas cooler, as shown in Figure 1, the step of employing is:

Step 1: the automatic welding built-up welding is carried out in the cone seat 12 welding equipment positions on shell ring 11; Step 2: bevel for welding 15 is machined into given size; Step 3: will bore seat 12 and be assembled on shell ring 11; Step 4: the inner wall of circumferential seam 13 of the appropriate cone seat 12 of manual welding weldering and shell ring 11; Step 5: the weld seam to cone seat 12 and shell ring 11 carries out carbon plane back chipping and polishing from outer wall 15; Step 6: the circumferential weld outer wall 15 that adopts the appropriate cone seat 12 of Lincoln weld weldering and shell ring 11.SHAPE \* MERGEFORMAT

Product technology requires regulation, and the concentricity requirement after cone seat 12 and shell ring 11 welding equipments is ± 4mm.Assemble according to above-mentioned assembly method, the requirement that shell ring 11 is resumed classes and do not reached ovality≤4mm after circle, therefore, cone seat 12 is difficult to satisfy the concentricity requirement of product with after deposited metal on shell ring 11 docks, and production efficiency is low.

Summary of the invention

The assembly method that the purpose of this invention is to provide a kind of conical seat of gas cooler can guarantee to bore the concentricity requirement of seat and shell ring; And greatly enhance productivity, effectively reduce manufacturing cost.

In order to achieve the above object, the present invention is achieved by the following technical solutions:

A kind of assembly method of conical seat of gas cooler is characterized in: its installation step is as follows:

Step 1: adopt the hot jacket method to bore the assembling of seat and shell ring;

Step 2: adopt manual welding, weld the inwall weld seam of appropriate cone and shell ring;

Step 3: the weld seam to cone seat and shell ring carries out machined from outer wall, does the back chipping processing;

Step 4: adopt Lincoln weld, weld the outer wall weld seam of appropriate cone and shell ring.

The assembly method of above-mentioned conical seat of gas cooler is characterized in: the hot jacket method in described step 1 also comprises the steps:

Step 1.1: place three equal-height padding irons on the level ground, with crane, shell ring is vertically placed on equal-height padding iron;

Step 1.2: draw a circle mark line in the predetermined welding equipment position of shell ring epicone seat, four location-plates of symmetric position welding equipment at mark line make the upper edge of location-plate be close to mark line;

Step 1.3: cone seat osculum is carried out machined;

Step 1.4: large mouthful of cone seat is carried out machined, make large mouthful of light out-of-plane of cone seat;

Step 1.5: three hangers of welding equipment on cone seat big opening end face;

Step 1.6: with sling cone seat of crane, large mouthful of planar horizontal of cone governor seat up after, be placed on the level ground;

Step 1.7: adopt electric infrared hot plate that the cone seat is heated, soaking time is 10 ~ 15 minutes;

Step 1.8: remove electric infrared hot plate,, will bore cover for seat and enter shell ring by three hanger lifting cone seats with crane;

Step 1.9: allow the cone seat that is inserted in shell ring naturally cool to normal temperature.

The assembly method of above-mentioned conical seat of gas cooler is characterized in: in described step 1.3, after cone seat osculum was carried out machined, the diameter of cone seat osculum was than the large 1mm ~ 3mm of shell ring external diameter.

The assembly method of above-mentioned conical seat of gas cooler is characterized in: be 180 ℃ ~ 250 ℃ to the temperature of cone seat heating in described step 1.7.

The assembly method of a kind of conical seat of gas cooler of the present invention is compared with existing assembly method, has the following advantages:

The present invention makes owing to adopting shell ring and the hot jacket method of cone seat to complete the assembling of cone seat ovality＜2mm that on shell ring, welding equipment cone seat is put, and satisfies product technology fully to the requirement of concentricity ± 4mm; Welding procedure is more reasonable, need not machined bevel for welding after the automatic welding built-up welding; After the weldering of inwall weld seam is appropriate, can adopt the mach method of vertical lathe to carry out back chipping, but not carbon plane back chipping has greatly improved production efficiency, and has effectively reduced manufacturing cost.

Description of drawings

Fig. 1 is the assembly method schematic diagram of prior art conical seat of gas cooler;

Fig. 2 is the assembly method schematic diagram of conical seat of gas cooler of the present invention;

Fig. 3 is conical seat of gas cooler heating schematic diagram;

Fig. 4 is the flow chart of the assembly method of conical seat of gas cooler of the present invention;

Fig. 5 is the flow chart of step 1 of the assembly method of conical seat of gas cooler of the present invention.

The specific embodiment

Below in conjunction with the specific embodiment, the present invention is further elaborated.

As Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, the step of the assembly method of conical seat of gas cooler is as follows:

Step 1: adopt the hot jacket method will bore seat 21 and be assembled on shell ring 22:

Step 1.1: place three equal-height padding irons 23 on the level ground, with crane, shell ring 22 is vertically placed on equal-height padding iron 23;

Step 1.2: draw a circle mark line in the predetermined welding equipment position of shell ring 22 epicone seats 21, make the upper edge of location-plate 24 be close to mark line at four location-plates 24 of symmetric position welding equipment of mark line;

Step 1.3: cone seat osculum 31 is carried out machined, make its diameter than shell ring 22 large 1 mm of external diameter ~ 3mm;

Step 1.4: with vertical lathe, the cone seat is carried out machined for large mouthful 32, make the large mouthful 32 smooth out-of-planes of cone seat;

Step 1.5: three hangers 33 of welding equipment on large mouthful 32 end faces of cone seat;

Step 1.6: with the crane cone seat 21 of slinging, large mouthful of 32 planar horizontal of cone governor seat up after, be placed on the level ground;

Step 1.7: electricity consumption infrared hot plate 34 will bore the circumference of seat 21 from cone seat osculum 31 ends to height 300mm ~ 500mm part coat after 21 to 180 ℃ ~ 250 ℃ of heating cone seats, and soaking 10 ~ 15 minutes;

Step 1.8: remove rapidly electric infrared hot plate 34, with sling three hangers 33 on large mouthful 32 end faces of cone seat of crane, will bore a seat osculum 31 and be inserted in shell ring 22, cone osculum 31 end face are overlapped with mark line, be close to edge on location-plate 24;

Step 1.9: allow cone seat 21 naturally cool to normal temperature.

Step 2: adopt the mode of stick electrode arc welding, according to the drawing dimensional requirement, that cone seat 21 is appropriate with inwall weld seam 26 welderings of shell ring 22;

Step 3: with vertical lathe, the weld seam of boring seat 21 and shell ring 22 is carried out machined from outer wall, do back chipping and process;

Step 4: adopt Lincoln weld, the outer wall weld seam 25 of welding cone seat 22 and shell ring 21, and all weld seams are carried out ultrasonic examination.

The concrete steps of the described hot cover process method of above-mentioned steps 1 as shown in Figure 5.

Be assembled on shell ring 22 by adopting the hot jacket method will bore 21, welding procedure is more reasonable, need not machined bevel for welding after the automatic welding built-up welding; After 26 welderings of inwall weld seam are appropriate, can adopt the mach method of vertical lathe to carry out back chipping, but not carbon plane back chipping has greatly improved production efficiency, and has effectively reduced manufacturing cost.

In the present embodiment, cone seat 21 is as shown in table 1 with shell ring 22 specifications:

Table 1 cone seat and shell ring specification

	Material	Wall thickness/mm	Diameter/mm
				The cone seat	SA387Gr11Cl2	70	Internal diameter 3143
Shell ring	SA387Gr11Cl2	70	External diameter 3140

Pass through FEM calculation, after cone seat 21 heats 200 ℃, the shrinkage stress of cooling generation is 673Mpa, and divide a piece of writing to get by looking into ASME II volume D, the yield strength of shell ring 22 is 310Mpa, cone seat 21 shrinkage stresses are greater than the yield strength of shell ring 22, so shell ring 22 can produce appropriate plastic deformation under the effect of cone seat 21 shrinkage stresses; The characteristic that utilization is expanded with heat and contract with cold, in cone seat 21 naturally cools to the process of normal temperature, shell ring 22 circularity change with the osculum of cone seat 21, treat that normal temperature is by measurement, cone seat 21 and shell ring 22 no-floats, ovality＜the 2mm of the welding equipment position of shell ring 22 epicone seats 21 can guarantee that fully product technology is to the requirement of concentricity ± 4mm.

In sum, the assembly method of conical seat of gas cooler provided by the invention can guarantee to bore the concentricity requirement of seat 21 and shell ring 22; Greatly enhance productivity, effectively reduce manufacturing cost.

Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.

Claims

1. the assembly method of a conical seat of gas cooler, it is characterized in that: its installation step is as follows:

Step 1: adopt the hot jacket method to bore the assembling of seat (21) and shell ring (22);

Hot jacket method in described step 1 also comprises the steps:

Step 1.1: place three equal-height padding irons (23) on the level ground, with crane, shell ring (22) is vertically placed on equal-height padding iron (23);

Step 1.2: at the standardized circle mark line in the predetermined welding equipment position of shell ring (22) epicone seat (21), at four location-plates of symmetric position welding equipment (24) of mark line, make the upper edge of location-plate (24) be close to mark line;

Step 1.3: cone seat osculum (31) is carried out machined;

Step 1.4: cone seat large mouthful (32) is carried out machined, make large mouthful (32) the light out-of-plane of cone seat;

Step 1.5: three hangers of welding equipment (33) on large mouthful (32) end face of cone seat;

Step 1.6: with the crane cone seat (21) of slinging, large mouthful of (32) planar horizontal of cone governor seat up after, be placed on the level ground;

Step 1.7: adopt electric infrared hot plate (34) that cone seat (21) is heated, heating region plays upwards 300 ~ 500mm width range for cone seat osculum (31), and soaking time is 10 ~ 15 minutes;

Step 1.8: remove electric infrared hot plate (34),, will bore seat (21) and be inserted in shell ring (22) by three hangers (33) lifting cone seats (21) with crane;

Step 1.9: allow the cone seat (21) that is inserted in shell ring (22) naturally cool to normal temperature;

Step 2: adopt manual welding, weld the inwall weld seam (26) of appropriate cone seat (21) and shell ring (22);

Step 3: the weld seam to cone seat (21) and shell ring (22) carries out machined from outer wall, does back chipping and processes;

Step 4: adopt Lincoln weld, weld the outer wall weld seam (25) of appropriate cone seat (21) and shell ring (22).

2. the assembly method of conical seat of gas cooler according to claim 1, is characterized in that: in described step 1.3, after cone seat osculum (31) is carried out machined, bore the diameter of seat osculum (31) than large 1 mm of shell ring (22) external diameter ~ 3mm.

3. the assembly method of conical seat of gas cooler according to claim 1, is characterized in that: in described step 1.7, be 180 ℃ ~ 250 ℃ to the temperature of boring seat (21) heating.