Improved fluidized bed boiler high-temperature nonmetal expansion joint

Abstract

The utility model relates to an improved fluidized bed boiler high-temperature non-metal expansion joint, and relates to the technical field of expansion joints, the improved fluidized bed boiler high-temperature non-metal expansion joint comprises a metal frame, the metal frame is connected with a fluidized bed boiler, an expansion joint is formed in the metal frame, a corrugated pipe for shielding the expansion joint is arranged on the outer side of the metal frame, and a first connecting assembly is arranged on the metal frame; a first drainage pipe is installed on the metal frame through a first connecting assembly, one end of the first drainage pipe communicates with the expansion joint, and the other end of the first drainage pipe extends out of the corrugated pipe. According to the expansion joint, the first drainage pipe is installed at the expansion joint of the metal frame, condensate water generated in the expansion joint can be drained out of the corrugated pipe through the first drainage pipe, and therefore the probability that the condensate water is accumulated in the expansion joint is reduced, and the service life of the expansion joint is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of expansion joints, and in particular to an improved high-temperature non-metallic expansion joint for fluidized bed boilers. Background Art

[0002] Fluidized bed boiler is a commonly used type of boiler, which is characterized by the use of fluidized bed technology to burn solid fuel or liquid fuel. In a fluidized bed boiler, the fuel is fluidized under the action of high-speed air or other gases. Since the medium running in the fluidized bed boiler is high temperature and high flow rate, it is necessary to install an expansion joint on the return pipe of the fluidized bed boiler to prevent the return pipe from exploding when transporting the medium.

[0003] In the related art, reference may be made to the Chinese utility model patent with the authorization announcement number CN201875348U, which discloses a high-temperature metal expansion joint for a CFB boiler with large axial and lateral displacement, good wear resistance, temperature resistance and long service life. It includes a metal frame, a bellows arranged on the outer periphery of the metal frame, an expansion joint arranged in the metal frame, and a guide assembly arranged in the expansion joint. The guide assembly is composed of a guide plate, a side plate arranged on one side of the guide plate, and a middle partition plate fixedly connected to the side plate. The utility model is suitable for connecting the return pipe of a J valve (or U valve) of a large CFB boiler.

[0004] However, in actual use of the above-mentioned metal expansion joint, due to the high temperature of the medium, the temperature difference between the inside and outside of the expansion joint is large, which makes it easy for condensed water to accumulate in the expansion joint. Under the influence of the acidic medium generated by the fluidized bed boiler, the condensed water is easy to corrode the internal structure of the expansion joint, thereby reducing the use effect and service life of the expansion joint. Utility Model Content

[0005] In order to reduce the probability of condensed water accumulation in the expansion joint, the present application provides an improved high-temperature non-metallic expansion joint for a fluidized bed boiler.

[0006] The present application provides an improved high-temperature non-metal expansion joint for a fluidized bed boiler, which adopts the following technical solution:

[0007] An improved high-temperature non-metallic expansion joint for a fluidized bed boiler comprises a metal frame, the metal frame is connected to the fluidized bed boiler, an expansion joint is formed on the metal frame, a bellows is provided on the outside of the metal frame to shield the expansion joint, a first connecting assembly is provided on the metal frame, a first drain pipe is installed on the metal frame through the first connecting assembly, one end of the first drain pipe is connected to the expansion joint, and the other end of the first drain pipe extends out of the bellows.

[0008] By adopting the above technical solution, a first drain pipe is installed at the expansion joint of the metal frame, and the condensed water generated in the expansion joint will be discharged out of the bellows through the first drain pipe, thereby reducing the probability of condensed water accumulation in the expansion joint and increasing the service life of the expansion joint.

[0009] Optionally, the first connection component includes:

[0010] A connecting skin, wherein the connecting skin is arranged on the metal frame and located at the expansion joint, the connecting skin is made of a flexible material, and the first drain pipe passes through the connecting skin;

[0011] A first connecting ring and a second connecting ring, wherein the first connecting ring is arranged on the first drain pipe, and the second connecting ring is slidably sleeved on the first drain pipe, and the first connecting ring and the second connecting ring are respectively located on two sides of the connecting skin;

[0012] A first connecting bolt passes through the first connecting ring, the connecting skin and the second connecting ring. The first connecting ring and the second connecting ring clamp the connecting skin under the action of the first connecting bolt.

[0013] By adopting the above technical solution, a flexible connecting skin is installed at the expansion joint of the metal frame, the first drain pipe is moved to pass through the connecting skin and the first connecting ring is made to contact with the connecting skin, the second connecting ring is moved to cooperate with the first connecting ring to clamp the connecting skin, and then the first connecting bolt is screwed to pass through the first connecting ring, the connecting skin and the second connecting ring in sequence to complete the installation of the first drain pipe at the expansion joint, so that the first drain pipe can perform drainage work without hindering the expansion and contraction function of the expansion joint.

[0014] Optionally, two side panels are provided on the inner wall of the metal frame, and the two side panels are respectively located on both sides of the expansion joint, and guide plates are provided on the two side panels. The two guide plates are inclined and staggered along the height direction of the side panels, and the distance between the end of the guide plate connected to the side panel and the first drain pipe is greater than the distance between the end of the guide plate away from the side panel and the first drain pipe.

[0015] By adopting the above technical solution, two side panels are installed at the expansion joint and guide plates are installed on the two side panels. The condensed water generated in the expansion joint will condense on the side panels. The condensed water will enter the first drain pipe and be discharged through the guidance of the guide plates, thereby completing the work of discharging the condensed water formed in the expansion joint.

[0016] Optionally, the two side plates are divided into a first plate and a second plate, the flow direction of the medium in the boiler flows from the first plate to the second plate, an inclined guide plate is provided on the plate end of the first plate, and the projection of the guide plate in the vertical direction covers the gap between the first plate and the second plate.

[0017] By adopting the above technical solution, a guide plate is installed on the plate end of the first plate, and the guide plate guides the medium flowing in the expansion joint, so that the medium flows through the opening of the expansion joint under the action of the guide plate, thereby reducing the probability of the medium entering the expansion joint and blocking the expansion joint.

[0018] Optionally, a baffle is provided on the plate end of the second plate.

[0019] By adopting the above technical solution, a baffle is installed on the plate end of the second plate, which can effectively block the medium flowing back on the edge of the expansion joint, thereby reducing the probability of the medium flowing back into the expansion joint after passing through the guide plate.

[0020] Optionally, the surfaces of the guide plate and the baffle plate are covered with a wear-resistant layer.

[0021] By adopting the above technical solution, the surfaces of the guide plate and the baffle are covered with a wear-resistant layer, thereby reducing the probability of damage to the guide plate and the baffle after long-term contact between the medium and the guide plate and the baffle, and increasing the service life of the guide plate and the baffle.

[0022] Optionally, a second drain pipe is provided on the corrugated pipe, the diameter of the second drain pipe is larger than the diameter of the first drain pipe, and the end of the first drain pipe extends into the second drain pipe.

[0023] By adopting the above technical solution, a second drain pipe is installed on the bellows, and the first drain pipe is inserted into the second drain pipe. Therefore, when the first drain pipe is blocked or the skin is broken, the second drain pipe can continue to drain water, thereby reducing the probability of condensation water accumulation in the expansion joint.

[0024] Optionally, a color display plate is provided at the outlet end of the second drain pipe, the color display plate is arranged at an angle, one end of the color display plate is connected to the second drain pipe, and the other end of the color display plate is inclined in a direction away from the second drain pipe, and the color display plate changes color when it comes into contact with water.

[0025] By adopting the above technical solution, an inclined color display plate is set at the water outlet of the second drain pipe. When the second drain pipe is needed to drain water due to blockage of the first drain pipe or rupture of the skin, the color display plate can change color when it comes into contact with water, thereby reminding the staff that the first drain pipe in the expansion joint needs to be repaired, making it convenient for the staff to repair the damaged first drain pipe in time, thereby improving work efficiency.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. By installing the first drain pipe at the expansion joint of the metal frame, the condensed water generated in the expansion joint will be discharged out of the bellows through the first drain pipe, thereby reducing the probability of condensed water accumulation in the expansion joint and increasing the service life of the expansion joint;

[0028] 2. By installing a flexible connection skin at the expansion joint of the metal frame, moving the first drain pipe through the connection skin and making the first connection ring contact the connection skin, moving the second connection ring to cooperate with the first connection ring to clamp the connection skin, and then screwing the first connection bolt to pass through the first connection ring, the connection skin and the second connection ring in sequence, the installation of the first drain pipe at the expansion joint can be completed, so that the first drain pipe can perform drainage work without hindering the expansion and contraction function of the expansion joint;

[0029] 3. By setting an inclined color display plate at the water outlet of the second drain pipe, when the second drain pipe is needed to drain water due to blockage of the first drain pipe or rupture of the skin, the color display plate can change color when it comes into contact with water, thereby reminding the staff to repair the first drain pipe in the expansion joint, making it convenient for the staff to repair the damaged first drain pipe in time, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the three-dimensional structure of the present application, in which the side wall of the metal frame is cut away;

[0031] Figure 2 yes Figure 1 Enlarged schematic diagram of part A in the middle.

[0032] Figure numerals: 1. Metal frame; 11. Expansion joint; 12. Bellows; 13. First drain pipe; 14. Second drain pipe; 15. Color display plate; 2. First connecting assembly; 21. Connecting skin; 22. First connecting ring; 23. Second connecting ring; 24. First connecting bolt; 31. Side panel; 32. Guide plate; 33. First panel; 34. Second panel; 35. Guide plate; 36. Baffle. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1 -Attached Figure 2 This application is described in further detail.

[0034] The embodiment of the present application discloses an improved high-temperature non-metallic expansion joint for a fluidized bed boiler.

[0035] Reference Figure 1The improved fluidized bed boiler high temperature non-metal expansion joint comprises a metal frame 1, which is connected to the fluidized bed boiler. An expansion joint 11 is provided on the metal frame 1, and a bellows 12 for shielding the expansion joint 11 is fixedly connected to the outer wall of the metal frame 1. A first connecting component 2 is provided on the metal frame 1, and a first drain pipe 13 is installed on the metal frame 1 through the first connecting component 2, one end of the first drain pipe 13 is connected to the expansion joint 11, and the other end of the first drain pipe 13 extends out of the bellows 12.

[0036] Reference Figure 1 and Figure 2 The first connection assembly 2 includes a connection skin 21, a first connection ring 22, a second connection ring 23 and a first connection bolt 24. The connection skin 21 is fixedly connected to the outer side wall of the metal frame 1 and is located at the expansion joint 11. The first connection ring 22 is fixedly connected to the outer side wall of the first drain pipe 13, and the second connection ring 23 is radially slidably sleeved on the first drain pipe 13 along the first drain pipe 13. One end of the first drain pipe 13 passes through the connection skin 21, and the other end of the first drain pipe 13 passes through the corrugated pipe 12. The first connection ring 22 and the second connection ring 23 are respectively located on both sides of the connection skin 21. The first connection bolt 24 passes through the first connection ring 22, the connection skin 21 and the second connection ring 23 in sequence, and the first connection ring 22 and the second connection ring 23 clamp the connection skin 21 under the action of the first connection bolt 24.

[0037] Reference Figure 1 and Figure 2 A second drain pipe 14 is fixedly connected to the outer wall of the corrugated pipe 12. The diameter of the second drain pipe 14 is larger than the diameter of the first drain pipe 13, and the end of the first drain pipe 13 extends into the second drain pipe 14. A color display board 15 is fixedly connected to the water outlet of the second drain pipe 14. The color display board 15 is arranged in an inclined manner, one end of the color display board 15 is connected to the second drain pipe 14, and the other end of the color display board 15 is inclined in a direction away from the second drain pipe 14, and the color display board 15 changes color when it encounters water.

[0038] Reference Figure 1 and Figure 2 , two side panels 31 are fixedly connected to the inner wall of the metal frame 1. The two side panels 31 are respectively located on both sides of the expansion joint 11. Guide plates 32 are fixedly connected to the opposite side walls of the two side panels 31. The two guide plates 32 are inclined along the height direction of the side panels 31 and are staggered. The distance between the end of the flow plate connected to the side panel 31 and the first drain pipe 13 is greater than the distance between the end of the guide plate 32 away from the side panel 31 and the first drain pipe 13. The condensed water generated in the expansion joint 11 will condense on the side panel 31, and the condensed condensed water will enter the first drain pipe 13 and be discharged through the guidance of the guide plate 32.

[0039] Reference Figure 1 and Figure 2 The two side plates 31 are divided into a first plate 33 and a second plate 34. The flow direction of the medium in the boiler flows from the first plate 33 to the second plate 34. An inclined guide plate 35 is fixedly connected to the plate end of the first plate 33. The projection of the guide plate 35 in the vertical direction covers the gap between the first plate 33 and the second plate 34. A baffle 36 is fixedly connected to the plate end of the second plate 34. The plate surfaces of the guide plate 35 and the baffle 36 are both covered with a wear-resistant layer. The guide plate 35 guides the medium flowing in the expansion joint, so that the medium flows through the opening of the expansion joint 11 under the action of the guide plate 35. The baffle 36 blocks the medium flowing back from the side of the expansion joint 11. This reduces the probability of the medium entering the expansion joint 11 and blocking the expansion joint 11.

[0040] The working principle of the embodiment of the present application is as follows:

[0041] The condensed water generated in the expansion joint 11 condenses out from the side plate 31, then enters the first drain under the action of the guide plate 32, and is then discharged out of the bellows 12 through the first drain pipe 13, thereby reducing the probability of condensed water accumulating in the expansion joint and increasing the service life of the expansion joint.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An improved high-temperature non-metal expansion joint for a fluidized bed boiler, characterized in that: The invention comprises a metal frame (1), wherein the metal frame (1) is connected to a fluidized bed boiler, an expansion joint (11) is provided on the metal frame (1), a bellows (12) is provided on the outside of the metal frame (1) to cover the expansion joint (11), a first connection assembly (2) is provided on the metal frame (1), a first drain pipe (13) is installed on the metal frame (1) via the first connection assembly (2), one end of the first drain pipe (13) is connected to the expansion joint (11), and the other end of the first drain pipe (13) extends out of the bellows (12).

2. The improved high-temperature non-metal expansion joint for fluidized bed boiler according to claim 1 is characterized in that: The first connection component (2) comprises: A connecting skin (21), the connecting skin (21) being arranged on the metal frame (1) and located at the expansion joint (11), the connecting skin (21) being a connecting skin (21) made of a flexible material, and the first drain pipe (13) passing through the connecting skin (21); A first connecting ring (22) and a second connecting ring (23), wherein the first connecting ring (22) is arranged on the first drain pipe (13), and the second connecting ring (23) is slidably sleeved on the first drain pipe (13), and the first connecting ring (22) and the second connecting ring (23) are respectively located on two sides of the connecting skin (21); A first connecting bolt (24), wherein the first connecting bolt (24) passes through the first connecting ring (22), the connecting skin (21) and the second connecting ring (23), and the first connecting ring (22) and the second connecting ring (23) clamp the connecting skin (21) under the action of the first connecting bolt (24).

3. The improved high-temperature non-metal expansion joint for fluidized bed boiler according to claim 2 is characterized in that: Two side panels (31) are arranged on the inner wall of the metal frame (1), and the two side panels (31) are respectively located on both sides of the expansion joint (11). The two side panels (31) are each provided with a guide plate (32), and the two guide plates (32) are inclined and staggered along the height direction of the side panels (31), and the distance between one end of the guide plate (32) connected to the side panel (31) and the first drain pipe (13) is greater than the distance between one end of the guide plate (32) away from the side panel (31) and the first drain pipe (13).

4. The improved high-temperature non-metal expansion joint for fluidized bed boiler according to claim 3 is characterized by: The two side plates (31) are divided into a first plate (33) and a second plate (34), and the medium in the boiler flows from the first plate (33) to the second plate (34). An inclined guide plate (35) is provided on the plate end of the first plate (33), and the projection of the guide plate (35) in the vertical direction covers the gap between the first plate (33) and the second plate (34).

5. The improved high-temperature non-metal expansion joint for fluidized bed boiler according to claim 4 is characterized in that: A baffle (36) is provided on the plate end of the second plate (34).

6. The improved high-temperature non-metal expansion joint for fluidized bed boiler according to claim 5, characterized in that: The surfaces of the guide plate (35) and the baffle plate (36) are both covered with a wear-resistant layer.

7. The improved high-temperature non-metal expansion joint for fluidized bed boiler according to claim 1 is characterized by: A second drainage pipe (14) is arranged on the corrugated pipe (12); the diameter of the second drainage pipe (14) is greater than the diameter of the first drainage pipe (13); and the end of the first drainage pipe (13) extends into the second drainage pipe (14).

8. The improved high-temperature non-metal expansion joint for fluidized bed boiler according to claim 7, characterized in that: A color display plate (15) is provided at the outlet pipe end of the second drainage pipe (14); the color display plate (15) is arranged in an inclined manner; one end of the color display plate (15) is connected to the second drainage pipe (14); the other end of the color display plate (15) is inclined in a direction away from the second drainage pipe (14); and the color display plate (15) changes color when in contact with water.

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