Air pre-heater sealing mechanism with limiting compensation function

Abstract

The air pre-heater sealing mechanism with the limiting compensation function comprises a first pipeline and a second pipeline, the middle of the first pipeline is of a corrugated structure, sealing filler is arranged on the inner walls of the two ends of the first pipeline, a first abutting ring making contact with the surface of the sealing filler is fixedly installed on the outer wall of the second pipeline, and a second abutting ring making contact with the surface of the sealing filler is fixedly installed on the outer wall of the second pipeline. First connecting seats are fixedly mounted at the two ends of the first pipeline; the first connecting base comprises a first base body fixedly installed on the outer wall of the first pipeline, and an annular butt joint groove is formed in one side of the first base body. The air pre-heater has the advantages that when the air pre-heater operates, hot air flows in the first pipeline and the second pipeline, so that the first pipeline is prone to thermal displacement, the first pipeline is of a corrugated structure, the first pipeline can be shrunk and lengthened, and the air pre-heater is convenient to use. And the problem that high-temperature flue gas in the air pre-heater causes thermal displacement to the pipeline, so that gaps are formed, and the sealing performance is affected is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of air preheater sealing, in particular to an air preheater sealing mechanism with a limit compensation function. Background Art

[0002] In thermal power plants, rotary air preheaters are widely used. They use the heat of flue gas discharged from the boiler to preheat the air entering the boiler for combustion, thereby improving the efficiency of the boiler.

[0003] However, when the existing air preheater is in use, the temperature of the hot flue gas inside the air preheater is very high. This high temperature environment will cause the pipes connected to it to expand due to heat. Since different materials have different thermal expansion coefficients, when the pipes are heated, their lengths, diameters and other dimensions will change, thereby causing thermal displacement. When the pipes are offset, gaps are likely to appear at the connections between the pipes, thereby affecting the sealing of the pipes, and further resulting in a decrease in the heat exchange effect of the air preheater. At the same time, most of the existing air preheater sealing mechanisms only use a sealing ring to seal the two pipes. When the air preheater undergoes thermal displacement, the relative position between the sealing ring and the sealing surface is likely to change, resulting in a decrease in the sealing effect, thereby resulting in a limited sealing effect. Utility Model Content

[0004] The utility model aims to provide an air preheater sealing mechanism with a limit compensation function to solve the above problems existing in the prior art.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] An air preheater sealing mechanism with a limit compensation function comprises a first pipe and a second pipe, wherein the middle portion of the first pipe is a corrugated structure, and sealing fillers are arranged on the inner walls of both ends, and a first abutment ring in contact with the surface of the sealing filler is fixedly installed on the outer wall of the second pipe;

[0007] Both ends of the first pipe are fixedly installed with a first connecting seat; the first connecting seat includes a first seat body fixedly installed on the outer wall of the first pipe, one side of the first seat body is provided with an annular docking groove, a spring is fixedly installed on the inner bottom of the docking groove, and the other end of the spring is fixedly installed with a sealing ring;

[0008] A second connecting seat is fixedly mounted on the outer wall of the second pipe; the second connecting seat comprises a second seat body fixedly mounted on the outer wall of the second pipe, and a second abutting ring matching the sealing ring is arranged on the side of the second seat body facing the first seat body.

[0009] The beneficial effects of the utility model are as follows: when the air preheater is in operation, hot air flows in the first pipe and the second pipe, making the first pipe prone to thermal displacement, and the first pipe is arranged as a corrugated structure, so that the first pipe can shrink and stretch, avoiding the problem that the high-temperature flue gas in the air preheater causes thermal displacement of the pipe and causes gaps, thereby affecting the sealing performance; at the same time, when the first pipe and the second pipe are installed, one end of the second pipe is inserted into the first pipe, at which time the first abutment ring on the outer wall of the second pipe fits with the inner wall of the sealing filler to achieve a first layer of sealing, and when the first pipe is connected to the second pipe, the second abutment ring on the second seat body is docked into the docking groove on the first seat body, at which time the second abutment ring will squeeze the sealing ring inward, causing the sealing ring to apply an extrusion force to the spring, and when the spring is compressed, elastic potential energy is generated, so that the spring will squeeze the sealing ring to one side of the second abutment ring, so that the second abutment ring and the sealing ring are tightly attached to achieve a second layer of sealing, and the sealing effect of the structure is improved by setting a double seal.

[0010] On the basis of the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, the first connecting seat also includes four first fixing seats fixedly mounted on the outer wall of the first seat body, and locking pins are rotatably mounted in the middle of the four first fixing seats, and knobs and locking blocks are respectively fixedly mounted at both ends of the locking pin.

[0012] Furthermore, the second connecting seat also includes four second fixing seats fixedly mounted on the outer wall of the second seat body, and locking holes matching the locking blocks are formed on one side of the four second fixing seats.

[0013] Furthermore, the first connecting seat also includes four positioning pins fixedly installed on the inner side of the docking groove, and the four positioning pins are equiangularly distributed in the docking groove.

[0014] Furthermore, the second connecting seat also includes four positioning holes which are arranged on a side of the second abutting ring away from the second seat body and match the positioning pins.

[0015] Furthermore, the second connecting seat also includes four internal thread seats fixedly mounted on the outer wall of the second seat body, and screws are threadedly inserted in the middle of the four internal thread seats. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the utility model;

[0018] Figure 3 For this utility model Figure 2 A is an enlarged structural diagram;

[0019] Figure 4 This is a schematic diagram of the first seat structure of the utility model;

[0020] Figure 5 For this utility model Figure 4 The enlarged structural diagram at B in FIG.

[0021] Figure 6 It is a schematic diagram of the second seat structure of the utility model.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. First pipeline; 2. Second pipeline; 3. First connecting seat; 301. First seat body; 302. First fixed seat; 303. Locking pin; 304. Docking groove; 305. Spring; 306. Sealing ring; 307. Positioning pin; 308. Knob; 309. Locking block; 4. Second connecting seat; 401. Second seat body; 402. Second abutting ring; 403. Positioning hole; 404. Second fixed seat; 405. Internal thread seat; 406. Locking hole; 407. Screw; 5. Sealing filler; 6. First abutting ring. DETAILED DESCRIPTION

[0024] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0025] like Figures 1 to 6 As shown, Embodiment 1 of the utility model is an air preheater sealing mechanism with a limit compensation function, comprising a first pipe 1 and a second pipe 2, the middle portion of the first pipe 1 is a corrugated structure, and sealing fillers 5 are arranged on the inner walls of both ends, and a first abutment ring 6 in contact with the surface of the sealing filler 5 is fixedly installed on the outer wall of the second pipe 2;

[0026] Both ends of the first pipe 1 are fixedly mounted with a first connection seat 3; the first connection seat 3 comprises a first seat body 301 fixedly mounted on the outer wall of the first pipe 1, a ring-shaped docking groove 304 is provided on one side of the first seat body 301, a spring 305 is fixedly mounted on the inner bottom of the docking groove 304, and a sealing ring 306 is fixedly mounted on the other end of the spring 305;

[0027] A second connection seat 4 is fixedly mounted on the outer wall of the second pipe 2 ; the second connection seat 4 comprises a second seat body 401 fixedly mounted on the outer wall of the second pipe 2 , and a second abutment ring 402 is fixedly mounted on one side of the second seat body 401 .

[0028] When the air preheater is in operation, hot gas flows in the first pipe 1 and the second pipe 2, making the first pipe 1 susceptible to thermal displacement. The first pipe 1 is configured as a corrugated structure, which allows the first pipe 1 to shrink and stretch, thereby preventing the high-temperature flue gas in the air preheater from causing thermal displacement of the pipe and resulting in gaps, which affects the sealing performance.

[0029] When the first pipe 1 and the second pipe 2 are installed, one end of the second pipe 2 is inserted into the first pipe 1. At this time, the first abutment ring 6 on the outer wall of the second pipe 2 fits with the inner wall of the sealing filler 5 to achieve a first layer of sealing. When the first pipe 1 and the second pipe 2 are connected, the second abutment ring 402 on the second seat body 401 is docked into the docking groove 304 on the first seat body 301. At this time, the second abutment ring 402 will squeeze the sealing ring 306 inward, causing the sealing ring 306 to apply an extrusion force to the spring 305. When the spring 305 is compressed, elastic potential energy is generated, so that the spring 305 will squeeze the sealing ring 306 to one side of the second abutment ring 402, so that the second abutment ring 402 and the sealing ring 306 are tightly attached to achieve a second layer of sealing. By setting a double seal, the sealing effect of the structure is improved.

[0030] Example 2 of the utility model is an air preheater sealing mechanism with a limit compensation function. On the basis of Example 1, the first connecting seat 3 also includes four first fixed seats 302 fixedly installed on the outer wall of the first seat body 301, and the middle parts of the four first fixed seats 302 are rotatably installed with locking pins 303, and the two ends of the locking pin 303 are respectively fixedly installed with a knob 308 and a locking block 309.

[0031] By using the knob 308 to rotate the locking pin 303 90°, it is convenient to drive the locking block 309 to rotate, so that the locking pin 303 can be inserted into the corresponding hole or groove after rotation, so that the first connecting seat 3 can achieve a more stable connection with other components or equipment, thereby preventing the first connecting seat 3 from accidentally loosening or separating.

[0032] Embodiment 3 of the utility model is an air preheater sealing mechanism with a limit compensation function. Based on embodiment 2, the second connecting seat 4 also includes four second fixed seats 404 fixedly installed on the outer wall of the second seat body 401, and a locking hole 406 is opened on one side of the four second fixed seats 404.

[0033] The first pipe 1 and the second pipe 2 can be pre-fixed by inserting the locking pin 303 into the second fixing seat 404 along the locking hole 406 and then rotating the locking pin 303 by 90° using the knob 308, thereby facilitating subsequent installation work.

[0034] Embodiment 4 of the utility model is an air preheater sealing mechanism with a limit compensation function. Based on any one of embodiments 1 to 3, the first connecting seat 3 also includes four positioning pins 307 fixedly installed on the inner side of the docking groove 304, and the four positioning pins 307 are equiangularly distributed in the docking groove 304.

[0035] It should be noted that the four positioning pins 307 all penetrate the sealing ring 306 , so that the positioning pins 307 limit the sealing ring 306 , thereby preventing the sealing ring 306 from rotating and accelerating wear, thereby extending the service life of the sealing ring 306 .

[0036] Example 5 of the utility model is an air preheater sealing mechanism with a limit compensation function. On the basis of Example 4, the second connecting seat 4 also includes four positioning holes 403 opened on the side of the second abutment ring 402 away from the second seat body 401, and the diameters of the four positioning holes 403 are adapted to the inner diameters of the four positioning pins 307.

[0037] When the staff inserts the second pipe 2 into the first pipe 1 , the four positioning pins 307 are inserted into the positioning holes 403 . The positioning pins 307 play a guiding role, thereby facilitating the staff to complete the docking work.

[0038] Embodiment 6 of the utility model is an air preheater sealing mechanism with a limit compensation function. Based on any one of embodiments 1 to 5, the second connecting seat 4 also includes four internal threaded seats 405 fixedly mounted on the outer wall of the second seat body 401, and the middle parts of the four internal threaded seats 405 are all threadedly inserted with screws 407.

[0039] By threading the screw rod 407 into the internal thread seats 405 on the second pipes 2 at both ends of the first pipe 1, the installation stability of the first pipe 1 and the second pipes 2 at both ends is further strengthened.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air preheater sealing mechanism with a limit compensation function, characterized in that: It comprises a first pipe (1) and a second pipe (2), wherein the middle portion of the first pipe (1) is a corrugated structure, and sealing fillers (5) are provided on the inner walls of both ends, and the outer wall of the second pipe (2) is fixedly mounted with a first abutment ring (6) in contact with the surface of the sealing filler (5); A first connecting seat (3) is fixedly mounted on both ends of the first pipe (1); the first connecting seat (3) comprises a first seat body (301) fixedly mounted on the outer wall of the first pipe (1); an annular docking groove (304) is provided on one side of the first seat body (301); a spring (305) is fixedly mounted on the inner bottom of the docking groove (304); and a sealing ring (306) is fixedly mounted on the other end of the spring (305); A second connecting seat (4) is fixedly mounted on the outer wall of the second pipe (2); the second connecting seat (4) comprises a second seat body (401) fixedly mounted on the outer wall of the second pipe (2); a second abutment ring (402) matching the sealing ring (306) is arranged on the side of the second seat body (401) facing the first seat body (301).

2. According to claim 1, an air preheater sealing mechanism with a limit compensation function is characterized in that: The first connecting seat (3) also includes four first fixed seats (302) fixedly mounted on the outer wall of the first seat body (301), and a locking pin (303) is rotatably mounted in the middle of the four first fixed seats (302), and a knob (308) and a locking block (309) are respectively fixedly mounted at both ends of the locking pin (303).

3. According to claim 2, an air preheater sealing mechanism with a limit compensation function is characterized in that: The second connecting seat (4) also includes four second fixing seats (404) fixedly mounted on the outer wall of the second seat body (401), and one side of the four second fixing seats (404) is provided with a locking hole (406) matching the locking block (309).

4. The air preheater sealing mechanism with limit compensation function according to claim 1, characterized in that: The first connection seat (3) further comprises four positioning pins (307) fixedly mounted on the inner side of the docking groove (304), wherein the four positioning pins (307) are equiangularly distributed in the docking groove (304).

5. The air preheater sealing mechanism with limit compensation function according to claim 4 is characterized in that: The second connecting seat (4) further comprises four positioning holes (403) which are arranged on a side of the second abutting ring (402) away from the second seat body (401) and match the positioning pins (307).

6. The air preheater sealing mechanism with position limiting compensation function according to any one of claims 1 to 5, characterized in that: The second connecting seat (4) further comprises four internal thread seats (405) fixedly mounted on the outer wall of the second seat body (401), wherein the middle parts of the four internal thread seats (405) are all threadedly inserted with screw rods (407).

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