A pressure relief structure capable of improving pressure bearing capacity of a nonmetallic expansion joint

Abstract

The utility model discloses a can improve non -metal expansion joint pressure -bearing capacity's pressure -relief structure, including symmetrical setting respectively connecting two sides external flue's metal frame, the metal frame includes flue connecting portion and skin connecting portion, both sides flue connecting portion face one side and is equipped with the flow -directing steel sheet respectively, both sides skin connecting portion face one side and is equipped with the flow -directing steel plate respectively, adjacent flow -directing steel sheet and flow -directing steel plate between all fill and be equipped with the heat preservation material, the flue connecting portion inside through the heat preservation material and flow -directing steel sheet is equipped with a plurality of pre -buried grab nail, pre -buried grab nail bottom connection is equipped with the inner lining steel plate, both sides skin connecting portion connection is equipped with the skin, the skin middle part is equipped with a plurality of pressure -relief components, the pressure -relief component side all is equipped with the filter cover, through the excess flue gas pressure that permeates to the skin one side is handled through the pressure -relief component pressure relief, makes this equipment can be applied to the use scene of high pressure flue gas, promotes equipment practicality.

Description

Technical Field

[0001] This utility model relates to the field of expansion joint technology, and in particular to a pressure relief structure that can improve the pressure-bearing capacity of non-metallic expansion joints. Background Technology

[0002] Expansion joints are commonly used in flue gas connections to compensate for axial, lateral, and angular displacements of pipes or equipment caused by temperature changes, mechanical vibrations, and installation errors. Due to their flexible installation and strong compensation capabilities, non-metallic expansion joints are the preferred choice for flexible boiler flue gas connections. However, even with pre-compressed insulation material (commonly ceramic fiber) between the expansion joint skin and the flue gas, existing non-metallic expansion joint structures allow flue gas to permeate along the insulation material to the skin. The skin then bears the same pressure as the flue gas, but the skin material has limited pressure resistance, thus restricting the application scenarios of non-metallic expansion joints. Utility Model Content

[0003] The purpose of this invention is to provide a pressure relief structure that can improve the pressure-bearing capacity of non-metallic expansion joints, so as to solve the problem mentioned in the background art that the existing non-metallic expansion joints are limited in their application scenarios due to insufficient pressure-bearing capacity.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pressure relief structure that can improve the pressure-bearing capacity of a non-metallic expansion joint, comprising a metal frame for connecting external flues on both sides, characterized in that: the metal frame includes a flue connection part and a skin connection part; the inner walls of opposite sides of the flue connection part are respectively provided with guide steel plates; the inner walls of opposite sides of the skin connection part are respectively provided with guide cooling steel plates; thermal insulation material is filled between adjacent guide steel plates and guide cooling steel plates; a plurality of pre-embedded nails are provided through the thermal insulation material and the guide steel plates on the inner side of the flue connection part; an inner lining steel plate is connected to the end of the pre-embedded nails; a skin is connected to the skin connection part; a plurality of pressure relief components are provided in the middle of the skin; and filter covers are provided on the sides of each pressure relief component.

[0005] Preferably, several of the guide cooling steel plates and the guide steel sheets are staggered from top to bottom, forming an S-shaped airflow channel.

[0006] Preferably, the guide steel plate is provided with through holes and expansion grooves for inserting the pre-embedded grab pins.

[0007] Preferably, the end of the pre-embedded grab pin is fitted with a set of clamps for fixing the inner lining steel plate, and the pre-embedded grab pin is connected to a locking nut on one side of the clamps.

[0008] Preferably, the top of the metal frame on both sides is provided with a clamping flange, and the middle of the clamping flange is provided with a number of bolts for installing and fixing the skin.

[0009] Preferably, the thickness of the guide steel sheet is less than 1 mm.

[0010] Preferably, the thickness of the cooling steel plate is more than 3 mm.

[0011] Preferably, the pressure relief assembly includes a pressure relief nozzle body that is sealed to the inner wall of the skin. The pressure relief nozzle body is provided with a sealing plate on the side near the skin. Both the sealing plate and the pressure relief nozzle body are provided with vent holes on the side away from the skin. A sealing spring is provided in the middle of the pressure relief nozzle body. One end of the sealing spring is connected to a nozzle core for sealing the vent hole in the middle of the sealing plate.

[0012] The beneficial effects of this utility model are:

[0013] 1. Almost all of the flue gas flows normally from the inlet side to the outlet side of the expansion joint. When the flue gas flows through this equipment, due to the limiting effect of the guide steel plate and the guide cooling steel plate, only a small amount of flue gas permeates and diffuses to the skin side through the insulation material along the S-shaped airflow channel formed by them. When the flue gas pressure is greater than the elastic force of the sealing spring, the flue gas will push the nozzle core to compress the sealing spring and open the pressure relief hole on the sealing plate side, thereby relieving the pressure on the inner side of the skin. The excess flue gas pressure that has permeated to the skin side is relieved through the pressure relief component, so that this equipment can be used in high-pressure flue gas application scenarios, improving the practicality of the equipment.

[0014] 2. By using guide cooling steel plates and guide steel sheets to restrict the flow of flue gas through the equipment in an S-shaped airflow channel, the flow penetration and diffusion operation is restricted, thereby increasing the stroke and resistance of flue gas penetration and diffusion to the skin side and reducing the amount of flue gas leaking into the atmosphere due to the opening of the pressure relief component.

[0015] 3. The guide steel plate is equipped with through holes and expansion grooves at the pre-embedded grab nails. When the flue is deformed by heat, the expansion grooves can accommodate the deformation of the expansion joint. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the guide steel sheet in the embodiment of this utility model;

[0018] Figure 3 This is a cross-sectional view of the pressure relief component in an embodiment of the present invention.

[0019] In the diagram: 1. Metal frame; 2. Flue connection; 3. Skin connection; 4. Guide steel plate; 41. Through hole; 42. Expansion groove; 5. Guide cooling steel plate; 6. Insulation material; 7. Embedded nail; 8. Inner lining steel plate; 9. Skin; 10. Pressure relief assembly; 101. Pressure relief nozzle body; 102. Sealing plate; 103. Vent hole; 104. Sealing spring; 105. Nozzle core; 11. Filter cover; 12. Clamping plate; 13. Locking nut; 14. Compression flange; 15. Bolt. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 3 This utility model provides a non-metallic expansion joint structure with pressure relief function, including a metal frame 1 for connecting external flues on both sides. The metal frame 1 includes a flue connection part 2 and a skin connection part 3. The inner walls of opposite sides of the flue connection part 2 are respectively provided with guide steel plates 4, and the inner walls of opposite sides of the skin connection part 3 are respectively provided with guide cooling steel plates 5. Insulation material 6 is filled between adjacent guide steel plates 4 and guide cooling steel plates 5. Several pre-embedded nails 7 are provided inside the flue connection part 2, penetrating the insulation material 6 and the guide steel plates 4. An inner lining steel plate 8 is connected to the bottom of each pre-embedded nail 7. A skin 9 is connected to the skin connection part 3. Several pressure relief components 10 are provided in the middle of the skin 9, and filter covers 11 are provided on the sides of each pressure relief component 10.

[0022] Specifically, the expansion joint connects the flue connection parts 2 of the two metal frames 1 to the flues on both sides of the external system. Almost all of the flue gas flows normally from the inlet side to the outlet side of the expansion joint. When the flue gas flows through this equipment, due to the restriction effect of the guide steel plate 4 and the guide cooling steel plate 5, only a small amount of flue gas permeates and diffuses to the skin 9 side through the insulation material along the S-shaped airflow channel formed by them. This increases the travel distance and resistance of the flue gas permeating and diffusing to the skin 9 side through the insulation material. When the flue gas pressure is greater than the elastic force of the sealing spring 104 in the pressure relief assembly 10, the flue gas will push the nozzle core 105 to compress the sealing spring 104, opening the pressure relief hole on one side of the sealing plate 102, thereby relieving the pressure on the inside of the skin 9. The pressure of the flue gas permeating to the skin 9 side is relieved through the pressure relief assembly 10, enabling this equipment to be used in high-pressure flue gas application scenarios and improving the practicality of the equipment.

[0023] Specifically, the cooling steel plate 5 can reduce the temperature of the micro-leaking flue gas, reduce the temperature of the flue gas that the skin 9 comes into contact with, and improve the service life of the skin 9.

[0024] Specifically, several of the aforementioned cooling steel plates 5 and cooling steel sheets 4 are staggered from top to bottom, forming an S-shaped airflow channel. The cooling steel plates 5 and cooling steel sheets 4 restrict the flow of flue gas passing through the equipment in an S-shaped airflow channel, thereby increasing the travel and resistance of the flue gas through the insulation material to the skin 9 side. This facilitates the discharge of excess flue gas on the skin 9 side to the atmosphere through the pressure relief assembly 10. The cooling steel plates 5 can reduce the temperature of the slightly leaking flue gas, reduce the temperature of the flue gas that the skin 9 comes into contact with, and improve the service life of the skin 9.

[0025] Specifically, the guide steel plates 4 and guide cooling steel plates 5 fixed on both sides have an expansion gap with the metal frame 1 on the other side. During actual operation, under the action of high-temperature flue gas, the flues on both sides are squeezed towards the equipment, thereby compressing the expansion space. While ensuring the stability of the expansion joint, this reduces the gap between the guide steel plates 4 and guide cooling steel plates 5 and the metal frame 1 on the other side, thus reducing the amount of flue gas leakage.

[0026] Specifically, the guide steel plate 4 is provided with a through hole 41 and an expansion groove 42 for inserting the pre-embedded grab nail 7. By passing the pre-embedded grab nail 7 through the through hole 41 and the expansion groove 42, the expansion groove 42 can adapt to the deformation of the expansion joint when the flue is deformed by heat.

[0027] Specifically, the bottom of the pre-embedded grab nail 7 is fitted with a set of clamping plates 12 for fixing the inner lining steel plate 8. The pre-embedded grab nail 7 is connected to a locking nut 13 on one side of the clamping plate 12. By placing the inner lining steel plate 8 between the two corresponding clamping plates 12, and then rotating the locking nut 13, the inner lining steel plate 8 is pressed against the insulation material 6 and locked to the bottom of the metal frame 1.

[0028] Specifically, the top of the metal frame 1 on both sides is provided with a clamping flange 14, and the middle of the clamping flange 14 is provided with several bolts 15 for installing and fixing the skin 9. By tightening the bolts 15, the clamping flange 14 is engaged with the skin connection part 3 of the metal frame 1, and the skin 9 is locked to the side of the metal frame 1.

[0029] Specifically, the thickness of the guide steel sheet 4 is less than 1 mm.

[0030] Specifically, the thickness of the flow-guiding cooling steel plate 5 is more than 3mm. The flow-guiding cooling steel plate 5 restricts the flow direction of flue gas infiltration on the one hand, and on the other hand, by cooperating with the metal frame 1, it is beneficial to dissipate heat from the medium and high temperature flue gas that has infiltrated into its vicinity. The heat of the flue gas is conducted to one side of the metal frame 1, and the heat conducted to one side of the metal frame 1 is further carried away by the external airflow, thereby reducing the temperature of the skin 9 during depressurization.

[0031] Specifically, the pressure relief assembly 10 includes a pressure relief nozzle 101 that is sealed to the inner wall of the skin 9. A sealing plate 102 is provided on the side of the pressure relief nozzle 101 near the skin 9. Vent holes 103 are provided on both the sealing plate 102 and the side of the pressure relief nozzle 101 away from the skin 9. A sealing spring 104 is provided in the middle of the pressure relief nozzle 101. One end of the sealing spring 104 is connected to a nozzle core 105 for sealing the vent hole 103 in the middle of the sealing plate 102. As the flue gas continuously permeates along the insulation material 6 to the side of the skin 9, the pressure on the side of the skin 9 gradually increases. When the flue gas pressure on the side of the skin 9 is greater than the elastic force of the sealing spring 104, the flue gas will push the nozzle core 105 to compress the sealing spring 104 and open the pressure relief hole on the side of the sealing plate 102, thereby relieving the pressure on the inside of the skin 9. The excess flue gas pressure that has permeated to the side of the skin 9 is relieved through the pressure relief assembly 10, so that this device can be used in high-pressure flue gas application scenarios.

[0032] Specifically, the insulation material 6 is a ceramic fiber blanket, etc.

[0033] The working principle of this utility model is as follows: During use, almost all of the flue gas flows normally from the inlet side of the expansion joint to the outlet side. When the flue gas flows through this device, due to the limiting effect of the guide steel plate 4 and the guide cooling steel plate 5, only a small amount of flue gas permeates and diffuses to the vicinity of the skin 9 through the insulation material along the S-shaped airflow channel formed by them. When the flue gas pressure is greater than the elastic force of the sealing spring 104, the flue gas will push the nozzle core 105 to compress the sealing spring 104 and open the pressure relief hole on one side of the sealing plate 102, thereby relieving the pressure on the inside of the skin 9. The excess flue gas pressure that has permeated to one side of the skin 9 is relieved through the pressure relief component 10, so that this device can be applied to high-pressure flue gas application scenarios, improving the practicality of the device.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure relief structure capable of improving the pressure bearing capacity of a non-metal expansion joint, comprising a metal frame (1) provided with metal frames (1) for connecting two external flues on both sides, characterized in that; The metal frame (1) includes a flue connection part (2) and a skin connection part (3). The inner walls of the flue connection part (2) on both sides are provided with guide steel plates (4). The inner walls of the skin connection part (3) on both sides are provided with guide cooling steel plates (5). The space between the adjacent guide steel plates (4) and the guide cooling steel plates (5) is filled with thermal insulation material (6). The inner side of the flue connection part (2) is provided with a number of pre-embedded nails (7) that penetrate the thermal insulation material (6) and the guide steel plates (4). The bottom of the pre-embedded nails (7) is connected to an inner lining steel plate (8). The skin connection part (3) is connected to a skin (9). The middle part of the skin (9) is provided with a number of pressure relief components (10). The sides of the pressure relief components (10) are provided with filter covers (11).

2. The pressure relief structure capable of improving pressure bearing capacity of a non-metal expansion joint according to claim 1, characterized in that; Several of the aforementioned cooling steel plates (5) and the aforementioned cooling steel sheets (4) are staggered from top to bottom, forming an S-shaped airflow channel.

3. A pressure relief structure according to claim 1 that can improve the pressure-bearing capacity of a non-metallic expansion joint, characterized in that; The guide steel plate (4) is provided with a through hole (41) and an expansion groove (42) for inserting the pre-embedded grab nail (7).

4. A pressure relief structure according to claim 1 that can improve the pressure-bearing capacity of a non-metallic expansion joint, characterized in that; The bottom of the pre-embedded grab nail (7) is fitted with a set of clamping plates (12) for fixing the inner lining steel plate (8), and the pre-embedded grab nail (7) is connected to a locking nut (13) on one side of the clamping plate (12).

5. A pressure relief structure according to claim 1 that can improve the pressure-bearing capacity of a non-metallic expansion joint, characterized in that; The metal frames (1) on both sides are provided with a clamping flange (14) on top, and the clamping flange (14) is provided with a number of bolts (15) for installing and fixing the skin (9) in the middle.

6. A pressure relief structure according to claim 1 that can improve the pressure-bearing capacity of a non-metallic expansion joint, characterized in that; The thickness of the guide steel sheet (4) is less than 1 mm.

7. A pressure relief structure according to claim 1 that can improve the pressure-bearing capacity of a non-metallic expansion joint, characterized in that; The thickness of the cooling steel plate (5) is more than 3 mm.

8. A pressure relief structure according to claim 1 that can improve the pressure-bearing capacity of a non-metallic expansion joint, characterized in that; The pressure relief assembly (10) includes a pressure relief nozzle (101) that is sealed to the inner wall of the skin (9). A sealing plate (102) is provided on the side of the pressure relief nozzle (101) near the skin (9). A vent hole (103) is provided on the side of the sealing plate (102) and the pressure relief nozzle (101) away from the skin (9). A sealing spring (104) is provided in the middle of the pressure relief nozzle (101). One end of the sealing spring (104) is connected to a nozzle core (105) for sealing the vent hole (103) in the middle of the sealing plate (102).

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