WO2011069332A1

WO2011069332A1 - Supporting structure allowing of free expansion of material returning device and material returning leg

Info

Publication number: WO2011069332A1
Application number: PCT/CN2010/001977
Authority: WO
Inventors: 尹双林; 刘义; 郑海英
Original assignee: 上海锅炉厂有限公司
Priority date: 2009-12-09
Filing date: 2010-12-07
Publication date: 2011-06-16
Also published as: ZA201105412B; TR201107771T1; CN201606863U

Abstract

A supporting structure allowing of free expansion of a material returning device (10) and a material returning leg (11) comprises a material returning device framework (20) connected fixedly with the material returning device (10), a material returning leg bracket (30) connected fixedly with the material returning leg (11), several smooth steel plates (40) connected fixedly with the material returning device framework (20) and the material returning leg bracket (30) respectively, as well as a first steel plate (51) and a second steel plate (52) with self-lubrication material layers (53) on their surfaces. The first steel plate (51) and the second steel plate (52) are arranged on a boiler steel frame (50) respectively. The material returning device framework (20) is placed on the first steel plate (51) through several smooth steel plates (40), and the material returning leg bracket (30) is placed on the second steel plate (52) through several smooth steel plates (40). The smooth surfaces of the smooth steel plates (40) are placed toward and in contact with the self-lubrication material layers (53) on the surfaces of the first steel plate (51) and the second steel plate (52), such that the smooth steel plates (40) can slide on the first steel plate (51) and the second steel plate (52). The material returning device (10) and the material returning leg (11) are supported independently on multiple points in a slideable way, hence the expansion difference between them in horizontal direction can be eliminated.

Description

Support structure capable of freely expanding the returning device and the returning leg

The present invention relates to a support structure, and more particularly to a support structure for uniformly transferring the load of the return feeder and the return leg to the steel frame and allowing it to freely expand. Background technique

The returning device is an important component in the material circulation system of the circulating fluidized bed boiler. Its function is as follows: First, the solid material separated from the separator is sent back to the furnace for combustion, and the second is to prevent the flue gas in the furnace from collapsing. Splitter. In the current technology, the "U" shape reclaimer is the most widely used one. The regenerator is mainly composed of a material drop pipe, a material riser pipe and a return leg.

When the boiler is running, both the return leg and the returning device will expand outward. However, due to various reasons such as on-site installation, the amount of expansion may be different, so that there will be a difference between the returning device and the returning leg. The difference in expansion. If no measures are taken to absorb this differential expansion, the weld at the joint between the two will be cracked.

The existing reclaimer is supported in two parts: the return leg load is transmitted to the boiler steel frame through a cantilever structure; the return load is transmitted to the steel plate welded to the frame through the frame, and the steel plate rests on the steel frame of the boiler. No welding is applied to the steel frame of the boiler. When expansion occurs, the steel plate is slid on the boiler steel frame to adjust the position, and the horizontal differential expansion is absorbed. A plurality of limiting devices are additionally mounted on the steel frame, so that the returning device and the returning leg supporting device do not have safety problems due to excessive sliding.

However, due to the large weight of the returning device and the returning leg, the structure cannot actually slide freely, so that the differential expansion between the returning device and the returning leg cannot be smoothly absorbed, and the reliability is poor, resulting in the returning device and the returning leg. The weld seam between the cracks affects normal production. Disclosure of invention

The object of the present invention is to provide a support structure for freely expanding the returning device and the returning leg, which can uniformly transfer the load of the returning device and the returning leg to the steel frame, and can freely expand and solve the returning material. The problem of the weld crack between the device and the return leg.

In order to achieve the above object, the technical solution of the present invention provides a reclaimer and a return leg.

1

Confirmation a freely expanding support structure comprising a first steel plate and a second steel plate having a self-lubricating material layer on the surface, wherein the first steel plate and the second steel plate are respectively disposed on a steel frame of the boiler;

The utility model further includes a returning frame fixedly connected with the returning device, a returning leg bracket fixedly connected with the returning leg, and a fixed connection with the returning device frame and the returning leg support respectively a number of smooth steel plates;

The returner frame is placed on the first steel plate by the plurality of smooth steel plates; the return leg support is placed on the second steel plate by the plurality of smooth steel plates;

The smooth surface of the plurality of smooth steel sheets is opposed to and in contact with the self-lubricating material layer on the surface of the first steel sheet and the second steel sheet, so that the smooth steel sheet can slide on the first steel sheet and the second steel sheet.

The return leg bracket includes a plurality of annular steel plates sleeved on a side of the return leg, and a plurality of reinforcing ribs vertically connecting adjacent the annular steel plates.

A plurality of the smooth steel plates are respectively fixedly disposed under the annular steel plate at the bottom of the return leg bracket.

The retractor frame includes a plurality of support beams; the support beams are fixedly coupled to the sides of the reclaimer, respectively.

A plurality of the smooth steel plates are correspondingly disposed on the bottom surfaces of the plurality of support beams of the return feeder frame. The smooth steel plate has a smooth surface facing downward; the self-lubricating material layer is disposed on a top surface of the first steel plate and the second steel plate.

The support structure for freely expanding the returning device and the returning leg further includes a plurality of first limiting devices disposed on the boiler steel frame around the first steel plate.

The support structure for freely expanding the returning device and the returning leg further comprises a plurality of second limiting devices disposed on the boiler steel frame around the second steel plate.

The heights of the first and second limiting devices are matched with the heights of the smooth steel plates placed on the first and second steel plates respectively to limit the sliding range of the smooth steel plate.

Compared with the prior art, the support structure of the present invention which can freely expand the returning device and the returning leg has the advantages that: the returning device and the returning leg of the invention pass through the smooth steel plate and the self-lubricating material The steel plate of the layer can slide relative to the steel frame of the boiler; once the two sides have a difference in the horizontal direction, the difference can be absorbed by the free sliding adjustment position, thereby effectively solving the weld between the returning device and the returning leg. The problem of cracking.

Since the return leg and the returning device adopt independent multi-point support, that is, from the bottom surface of the return leg bracket Supporting the points and supporting from the bottom surfaces of the plurality of support beams of the return frame, so that the load on each support point is relatively low; and the self-lubricating material on the steel plate is greatly reduced between the smooth steel plate and the smooth steel plate The sliding friction further improves the sliding effect of the returning device and the returning leg on the steel frame of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic view showing an independent multi-point sliding support structure for a returning device and a returning leg of the present invention; FIG. 2 is an enlarged view of the CC position of the returning leg support structure of the present invention in FIG. 1; The structure of the invention for the return leg support is shown in the EE direction in FIG. 2;

Figure 4 is a D-D view of the structure of the present invention for the feeder support in Figure 1;

Figure 5 is a cross-sectional view of the structure of the present invention for the feeder support in the F-F direction of Figure 4;

Fig. 6 is a view showing the structure of a steel sheet with a self-lubricating material layer in a returning device and a return leg supporting structure in the present invention. The best way to implement the invention

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in Fig. 1, the support structure for freely expanding the returning device 10 and the return leg 11 of the present invention is an independent multi-point sliding support structure for the returning device 10 and the returning leg 11.

Referring to Figures 1 to 3, the return leg 11 is fixedly coupled to an annular return leg bracket 30. The return leg bracket 30 includes upper and lower annular steel plates 31 sleeved on the side of the return leg 11 and a plurality of reinforcing ribs 32 perpendicularly connecting the two annular steel plates 31. The annular leg steel plate 31 located at the lower side of the return leg bracket 30 has a plurality of positions on the bottom surface thereof, and a smooth steel plate 40 is welded and fixed.

The smooth steel plate 40 is placed on the second steel plate 52 with the self-lubricating material layer 53 provided on the boiler steel frame 50, and the load of the return leg 11 on the smooth steel plate 40 is transmitted to the boiler steel frame 50. At the same time, the smooth surface of the smooth steel plate 40 faces downward and is in contact with the self-lubricating material (Fig. 6) on the top surface of the second steel plate 52, so that the frictional resistance is small, and the returning leg 11 is facilitated to pass during expansion. The return leg bracket 30 and the smooth steel plate 40 are slid on the steel plate with the self-lubricating material layer 53 to perform position adjustment.

In order to prevent the return leg 11 from slipping excessively, a plurality of second limiting devices 62 are respectively disposed on the boiler steel frame 50 around the second steel plate 52. As shown in FIG. 3, two of the second limiting devices 62 are The opposite sides of the second steel plate 52 are disposed. The height of the second limiting device 62 matches the height of the smooth steel plate 40 placed on the second steel plate 52 to limit the sliding range of the smooth steel plate 40.

Similar to the above structure, as shown in FIG. 1, FIG. 4, and FIG. 5, the supporting device of the ejector 10 includes a ejector frame 20; the ejector frame 20 is provided with a plurality of supporting beams 21 And fixedly connected to the side of the ejector 10 respectively. Each of the support beams 21 of the ejector frame 20 is fastened to the smooth steel plate 40 at its bottom surface.

The smooth steel plate 40 is placed on the first steel plate 51 (Fig. 6) of the boiler steel frame 50 with the self-lubricating material layer 53 to transfer the load of the return feeder 10 to the boiler steel frame 50. The smooth surface of the smooth steel plate 40 faces downward, and is opposite to the self-lubricating material on the top surface of the first steel plate 51, and reduces the sliding of the ejector 10 through the ejector frame 20 and the smooth steel plate 40 when the ejector 10 is expanded. Frictional resistance.

In order to prevent excessive slippage when the positioner 10 is adjusted in position, a plurality of first limiting means 61 are respectively disposed around the first steel plate 51 on the boiler steel frame 50. In Fig. 5, two of the first limiting devices 61 are disposed on adjacent sides of the first steel plate 51. The height of the first limiting device 61 matches the height of the smooth steel plate 40 placed on the first steel plate 51 to limit the sliding range of the smoothing steel plate 40.

As shown in FIG. 6 , preferably, the self-lubricating material provided on the top surfaces of the first and second steel plates can use SF-1 type material, and has good wear resistance and small friction coefficient, thereby effectively reducing the first and the first Sliding friction between the two steel plates and the smooth steel plate 40.

In order to enable the returning device 10 and the returning leg 11 to slide better on the boiler steel frame 50, preferably, the smoothing steel plate 40 of the returning leg 11 is supported on the first steel plate 51, The support surfaces of the smooth steel sheets 40 of the hopper 10 on the second steel sheet 52 are on the same level of height.

In summary, the returning device and the returning leg can be relatively slid on the steel frame of the boiler through the smooth steel plate and the steel plate with the layer of self-lubricating material; once the two have a differential expansion in the horizontal direction, the can pass The free sliding adjustment position absorbs the differential expansion, thereby effectively solving the problem of weld cracking between the returning device and the returning leg.

Since the return leg and the returning device adopt independent multi-point support, that is, support from multiple points on the bottom surface of the return leg bracket, and support from the bottom surface of the plurality of support beams of the return frame, so that each support point is The load is relatively low; with the self-lubricating material on the steel plate, it is greatly reduced with smooth steel The sliding friction between the plates further improves the sliding effect of the returning and returning legs on the steel frame of the boiler.

Although the present invention has been described in detail by the preferred embodiments thereof, it should be understood that the foregoing description should not be construed as limiting. Various modifications and alterations of the present invention will be apparent to those skilled in the art. Therefore, the scope of the invention should be limited by the appended claims.

Claims

Rights request

A support structure for freely expanding a returning device and a returning leg, characterized by comprising a first steel plate (51) and a second steel plate (52) having a self-lubricating material layer (53) on the surface, First steel plate

(51), the second steel plate (52) is respectively disposed on the boiler steel frame (50);

Also included is a return feeder frame (20) fixedly coupled to the return feeder (10), a return leg bracket (30) fixedly coupled to the return leg (11), and the return feeder a frame (20), the return leg bracket (30) are respectively fixedly connected to a plurality of smooth steel plates (40);

The ejector frame (20) is placed on the first steel plate (51) by the plurality of smooth steel plates (40); the return leg support (30) is placed by the plurality of smooth steel plates (40) On the second steel plate (52);

a smooth surface of the plurality of smooth steel plates (40) and the first steel plate (51) and the second steel plate

(52) The surface of the self-lubricating material layer (53) is opposed to and in contact with each other, so that the smooth steel sheet (40) can slide on the first steel sheet (51) and the second steel sheet (52).

2. The support structure for freely expanding the returning device and the return leg according to claim 1, wherein the return leg bracket (30) comprises a sleeve disposed on a side of the return leg (11) A plurality of annular steel plates (31), and a plurality of reinforcing ribs (32) vertically connected to the adjacent annular steel plates (31).

3. The support structure for freely expanding the returning device and the return leg according to claim 2, wherein a plurality of said smooth steel plates (40) are respectively fixedly disposed at the bottom of said return leg bracket (30) The annular steel plate (31) is under.

4. The support structure for freely expanding the return feeder and the return leg according to claim 1, wherein the return feeder frame (20) comprises a plurality of support beams (21); the support beam (21) ) is fixedly connected to the side of the ejector (10), respectively.

5. The support structure for freely expanding the returning device and the return leg according to claim 4, characterized in that a plurality of said smooth steel plates (40) are correspondingly arranged in the returning frame (20) Support beam (21) bottom surface

The support structure for freely expanding the returning device and the return leg according to any one of claims 1 to 5, characterized in that the smooth surface of the smooth steel plate (40) faces downward; the self-lubricating material Floor

(53) disposed on a top surface of the first steel plate (51) and the second steel plate (52).

7. The support structure for freely expanding the return feeder and the return leg according to claim 1, further comprising a plurality of first limiting devices (61) on the boiler steel frame (50) And disposed around the first steel plate (51).

8. The support structure for freely expanding the return feeder and the return leg according to claim 7, further comprising a plurality of second limiting devices (62) on the boiler steel frame (50) And disposed around the second steel plate (52).

9. The support structure for freely expanding the returning device and the return leg according to claim 8, wherein the height of the first and second limiting devices (61, 62) and the smooth steel plate (40) The heights respectively placed on the first and second steel plates (51, 52) are matched to limit the sliding range of the smooth steel plate (40).