Flue one-way partition valve

Abstract

The utility model discloses a flue one -way partition valve, including the flue pipe for connecting the both ends of external flue system, the flue pipe all is connected with the clamping ring, the clamping ring middle part is equipped with the clamping groove, both sides clamping groove common connection is equipped with the one -way valve pipe, clamping ring side edge symmetry is equipped with the lock catch subassembly for locking one -way valve pipe, one -way valve pipe middle part is hinged and is equipped with the partition subassembly, through with both sides clamping ring insertion cooperation respectively one -way valve pipe both ends part, and then conveniently realizes the assembly of one -way valve pipe and clamping ring, and then install one -way valve pipe to the flue system, and cooperate through the partition subassembly in one -way valve pipe and the flue gas in the flue system, realize the partition of flue system prevents the flue gas backflow and causes the equipment damage or safety accident, or open makes the flue gas normal circulation, can dismantle its maintenance or replacement through the connection bolt of dismantling clamping ring and flue pipe, promotes the effect of using up.

Description

Technical Field

[0001] This utility model relates to the field of flue gas pipeline valve technology, and in particular to a flue gas one-way isolation valve. Background Technology

[0002] The boiler tail flue is a flue structure located at the tail of the boiler for exhausting flue gas. It contains economizers, air preheaters, and other components to handle flue gas discharge and waste heat recovery. However, to prevent flue gas or high-temperature gas from flowing back into the boiler due to pressure imbalance in the flue system, which could cause equipment damage or safety accidents, one-way valves are often connected and installed in the boiler flue to prevent backflow. However, the one-way valves in existing boiler flue systems are inconvenient to disassemble. When the components of the one-way valve are damaged or reach the end of their service life, it is inconvenient to disassemble, repair, or replace them, resulting in poor performance. Utility Model Content

[0003] The purpose of this utility model is to provide a one-way isolation valve for flues to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a flue gas one-way isolation valve, comprising flue pipes for connecting the two ends of an external flue gas system, each flue pipe being connected to a snap-fit ​​ring, the snap-fit ​​ring having a snap-fit ​​groove in the middle, the snap-fit ​​grooves on both sides being connected to a one-way valve pipe, the snap-fit ​​ring having symmetrically provided locking assemblies for locking the one-way valve pipes on its sides, and an isolation assembly being hinged to the middle of the one-way valve pipes.

[0005] Preferably, the snap ring has several positioning holes on both the top and bottom walls of the snap groove, and a sealing groove is provided on the side of the snap ring that fits against the flue, and a sealing ring is provided in the sealing groove.

[0006] Preferably, the connecting end of the one-way valve tube is fitted with a positioning pin for insertion and positioning with the positioning hole, and a second sealing groove is provided on both sides of the outer circular wall of the one-way valve tube. A second sealing ring is fitted inside the second sealing groove, and a fixing hole is provided for disassembly and assembly of the one-way valve tube and the locking assembly.

[0007] Preferably, the locking assembly includes telescopic cavities symmetrically arranged on the side of the snap ring, a drive plate slidably arranged in the telescopic cavity, a plurality of locking blocks arranged through the inner wall of the snap groove on the drive plate, a cover plate at the opening of the telescopic cavity, a guide post arranged through the cover plate on the outward side of the drive plate, and a reset spring sleeved on the outer circular wall of the guide post.

[0008] Preferably, the locking block is wedge-shaped and extends through one end of the locking groove.

[0009] Preferably, the drive plate has a toggle block on its side, and the snap ring has a guide groove for guiding the toggle block.

[0010] Preferably, the partition assembly includes a hinge cavity provided on the inner wall of the one-way valve pipe, a rotating shaft is rotatably provided at one end of the hinge cavity, a sealing plate is connected to the outer circular wall of the rotating shaft, and a torsion spring is sleeved at both ends of the outer circular wall of the rotating shaft.

[0011] Preferably, the cross-sectional area of ​​the sealing plate is larger than the cross-sectional area of ​​the flue.

[0012] The beneficial effects of this utility model are: 1. By connecting the two ends of the one-way valve pipe to the snap-fit ​​rings on both sides, the assembly of the one-way valve pipe and the snap-fit ​​rings is easily achieved. The one-way valve pipe is then installed into the flue system. Through the isolation component in the one-way valve pipe, it cooperates with the flue gas in the flue system to isolate the flue system and prevent backflow of flue gas from causing equipment damage or safety accidents, or to open it to allow the flue gas to flow normally. When the components in the one-way valve are damaged or reach the end of their service life, they can be disassembled, repaired, or replaced by removing the connecting bolts between the snap-fit ​​ring and the flue pipe, thus improving the overall use effect.

[0013] 2. During the insertion process of the one-way valve tube into the snap-fit ​​groove, the side wall of the one-way valve tube will contact the locking block and further press against the locking block to compress the reset spring and drive the drive plate to move along the telescopic cavity until the locking block is inserted into the fixing hole of the side wall of the one-way valve tube, so as to realize the adaptive and rapid installation of the snap-fit ​​ring and the one-way valve tube.

[0014] 3. When the flue gas pressure in the flue system reaches a certain value, it will push the sealing plate to rotate synchronously with the rotating shaft along the hinge cavity. The torsion spring will be twisted and compressed to open the flue to facilitate one-way flow of flue gas. When the pressure in the flue system is unbalanced, the torsion spring will press against the sealing plate to seal the flue pipe channel, preventing flue gas or high-temperature gas from flowing back into the boiler and causing equipment damage or safety accidents. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 This is a cross-sectional perspective view of an embodiment of the present utility model. Figure 3 This is a front view of the snap-fit ​​ring in an embodiment of this utility model; Figure 4 This is a three-dimensional structural diagram of the snap ring in an embodiment of the present invention; Figure 5 This is a three-dimensional structural diagram of the one-way valve tube in an embodiment of the present utility model; Figure 6 This is an enlarged structural diagram of point A in an embodiment of this utility model; Figure 7 This is an enlarged structural diagram of section B in an embodiment of the present utility model; Figure 8 This is an enlarged structural diagram of point C in an embodiment of the present invention.

[0016] In the diagram: 1. Smoke pipe; 2. Snap-fit ​​ring; 21. Sealing groove one; 22. Sealing ring one; 3. Snap-fit ​​groove; 4. One-way valve pipe; 5. Locking assembly; 51. Telescopic cavity; 52. Drive plate; 53. Locking block; 54. Cover plate; 55. Guide post; 56. Return spring; 6. Partition assembly; 61. Hinge cavity; 62. Rotating shaft; 63. Sealing plate; 64. Torsion spring; 7. Positioning hole; 8. Positioning pin; 9. Sealing groove two; 10. Sealing ring two; 11. Toggle block; 12. Guide groove; 13. Fixing hole. Detailed Implementation

[0017] 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.

[0018] Please see Figures 1 to 8 This utility model provides a one-way isolation valve for a flue, including flue pipes 1 for connecting the two ends of an external flue system. Each flue pipe 1 is connected to a snap-fit ​​ring 2. The snap-fit ​​ring 2 has a snap-fit ​​groove 3 in its center, and two snap-fit ​​grooves 3 on both sides are connected to a one-way valve pipe 4. The snap-fit ​​rings 2 have symmetrically arranged locking assemblies 5 on their sides for locking the one-way valve pipe 4. An isolation assembly 6 is hinged to the center of the one-way valve pipe 4. By inserting the two ends of the one-way valve pipe 4 into the snap-fit ​​rings 2 on both sides, the assembly of the one-way valve pipe 4 and the snap-fit ​​rings 2 is conveniently achieved, facilitating subsequent... The assembled one-way valve pipe 4 is then connected to the flue system via bolts at both ends of the flue system using locking rings 2. The one-way valve pipe 4 is then installed into the flue system. Through the isolation component 6 within the one-way valve pipe 4, it interacts with the flue gas within the flue system to isolate the flue system, preventing backflow of flue gas that could damage equipment or cause safety accidents. Alternatively, it can be opened to allow normal flue gas flow. Furthermore, when components in the one-way valve are damaged or reach the end of their service life, they can be disassembled, repaired, or replaced by removing the bolts connecting the locking rings 2 and the flue pipe 1, thus improving the overall performance.

[0019] like Figure 4 and Figure 6As shown, specifically, the snap ring 2 is provided with several positioning holes 7 on both the top and bottom walls of the snap groove 3. The snap ring 2 is provided with a sealing groove 21 on the side that fits against the flue pipe 1. A sealing ring 22 is provided in the sealing groove 21. By providing a sealing ring 22 on the side of the snap ring 2 that fits against the flue pipe 1, the sealing effect of the snap ring 2 and the flue system is further improved, and the leakage of flue gas is prevented.

[0020] like Figure 5 and Figure 8 As shown, specifically, the connecting end of the one-way valve tube 4 is fitted with a positioning pin 8 for insertion and positioning with the positioning hole 7. The outer circular wall of the one-way valve tube 4 has two sealing grooves 9 on both sides, and a sealing ring 10 is fitted inside the sealing groove 9. The side wall of the one-way valve tube 4 is provided with several fixing holes 13 for disassembly and assembly with the locking assembly 5. By setting the positioning pin 8 at the end of the one-way valve tube 4 and inserting it into the positioning hole 7 in the locking groove 3 of the locking ring 2, it is easy to realize the quick positioning and installation of the one-way valve tube 4 and the locking rings 2 on both sides.

[0021] like Figure 6 As shown, specifically, by setting sealing rings 10 at both ends of the one-way valve pipe 4, the airtightness of the connection between the one-way valve pipe 4 and the snap ring 2 is improved, preventing flue gas from leaking from the connection.

[0022] Furthermore, the sealing ring 2 10 can also be disposed on the inner wall of the snap groove 3 of the snap ring 2.

[0023] like Figure 3 and Figure 7 As shown, specifically, the locking assembly 5 includes telescopic cavities 51 symmetrically arranged on the side of the snap ring 2. A drive plate 52 is slidably arranged inside the telescopic cavity 51. The drive plate 52 has several locking blocks 53 that penetrate the inner wall of the snap groove 3. A cover plate 54 is provided at the opening of the telescopic cavity 51. A guide post 55 is provided through the cover plate 54 on the outward side of the drive plate 52. A return spring 56 is sleeved on the outer circular wall of the guide post 55. During the insertion process of the one-way valve tube 4 into the snap groove 3, the side wall of the one-way valve tube 4 will contact the locking block 53 and further press the locking block 53 to compress the return spring 56, driving the drive plate 52 to move along the telescopic cavity 51 until the locking block 53 is inserted into the fixing hole 13 on the side wall of the one-way valve tube 4, realizing the adaptive and rapid installation of the snap ring 2 and the one-way valve tube 4.

[0024] Specifically, the locking block 53 is wedge-shaped and passes through one end of the snap-fit ​​groove 3. The wedge-shaped locking block 53 facilitates contact and abutment with the side wall of the one-way valve tube 4, and further engages with the fixing hole 13, so as to quickly realize the disassembly and assembly of the one-way valve tube 4 and the snap-fit ​​ring 2, which is convenient for quick disassembly, maintenance or assembly and replacement.

[0025] like Figure 1As shown, specifically, the drive plate 52 is provided with a toggle block 11 on its side, and the snap ring 2 is provided with a guide groove 12 for guiding the toggle block 11. The maintenance personnel move the toggle block 11 in the locking block 53 assembly along the guide groove 12, thereby driving the drive plate 52 to compress the spring along the telescopic cavity 51, so that the locking block 53 is disengaged from the fixing hole 13, thereby unlocking the one-way valve tube 4, which facilitates quick disassembly and maintenance of the snap ring 2 and the one-way valve tube 4.

[0026] like Figure 4 and Figure 8 As shown, specifically, the partition assembly 6 includes a hinge cavity 61 provided on the inner wall of the one-way valve pipe 4. A rotating shaft 62 is rotatably provided at one end of the hinge cavity 61. A sealing plate 63 is connected to the outer circular wall of the rotating shaft 62. Torsion springs 64 are sleeved at both ends of the outer circular wall of the rotating shaft 62. When the flue gas pressure in the flue system reaches a certain value, it will push the sealing plate 63 to rotate synchronously with the rotating shaft 62 along the hinge cavity 61, and twist and compress the torsion springs 64 to open the flue to facilitate one-way flow of flue gas. When the pressure in the flue system is unbalanced, the torsion springs 64 will press against the sealing plate 63 to seal the flue pipe 1 channel, preventing flue gas or high-temperature gas from flowing back into the boiler and causing equipment damage or safety accidents.

[0027] Specifically, the cross-sectional area of ​​the sealing plate 63 is larger than that of the flue pipe 1, so that the torsion spring 64 can press the sealing plate 63 to seal the flue pipe 1 and prevent the flue gas from flowing back.

[0028] The working principle of this utility model is as follows: In use, the one-way valve pipe 4 is conveniently assembled by inserting and connecting the two ends of the one-way valve pipe 4 to the two side retaining rings 2. Then, the one-way valve pipe 4 is installed into the flue system. Through the isolation component 6 in the one-way valve pipe 4, it cooperates with the flue gas in the flue system to isolate the flue system and prevent backflow of flue gas from causing equipment damage or safety accidents, or to open it to allow the flue gas to flow normally. When the components in the one-way valve are damaged or reach the end of their service life, they can be disassembled, repaired or replaced by removing the connecting bolts between the retaining ring 2 and the flue pipe 1, thus improving the overall use effect.

[0029] 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 flue gas one-way shut-off valve, comprising a flue pipe (1) for connecting both ends of an external flue gas system, characterized in that, Each of the flue pipes (1) is connected to a snap ring (2), and the snap ring (2) has a snap groove (3) in the middle. Both sides of the snap groove (3) are connected to a one-way valve pipe (4). The snap ring (2) is symmetrically provided with a locking assembly (5) for locking the one-way valve pipe (4). The one-way valve tube (4) is hinged in the middle and a partition assembly (6) is provided. The two ends of the outer circular wall of the one-way valve tube (4) are provided with sealing grooves (9). A sealing ring (10) is provided inside the sealing groove (9). The one-way valve tube (4) and the locking assembly (5) are provided with a fixing hole (13). The partition assembly (6) includes a hinge cavity (61) provided in the inner wall of the one-way valve tube (4). A rotating shaft (62) is provided at one end of the hinge cavity (61). Torque springs (64) are provided at both ends of the outer circular wall of the rotating shaft (62). The locking assembly (5) includes telescopic cavities (51) symmetrically arranged on the side of the snap ring (2). A drive plate (52) is slidably arranged in the telescopic cavity (51). The drive plate (52) has several locking blocks (53) through the inner wall of the snap groove (3). A cover plate (54) is provided at the opening of the telescopic cavity (51). A guide post (55) is provided through the cover plate (54) on the outward side of the drive plate (52). A reset spring (56) is sleeved on the outer circular wall of the guide post (55).

2. The flue gas one-way isolation valve according to claim 1, characterized in that, The snap ring (2) is provided with several positioning holes (7) on the top and bottom walls of the snap groove (3). The snap ring (2) is provided with a sealing groove (21) on the side of the pipe (1) that is attached to it. A sealing ring (22) is provided in the sealing groove (21).

3. A flue gas duct one-way isolation valve according to claim 2, characterized in that, The connecting end of the one-way valve tube (4) is fitted with a positioning pin (8) for positioning and positioning with the positioning hole (7).

4. A flue gas duct one-way isolation valve according to claim 1, characterized in that, The locking block (53) passes through one end of the snap-fit ​​groove (3) and is wedge-shaped.

5. A flue gas duct one-way isolation valve according to claim 1, characterized in that, The drive plate (52) has a toggle block (11) on its side, and the snap ring (2) has a guide groove (12) for guiding the toggle block (11).

6. A flue gas duct one-way isolation valve according to claim 1, characterized in that, The outer circular wall of the rotating shaft (62) is connected to a sealing plate (63), and the cross-sectional area of ​​the sealing plate (63) is larger than the cross-sectional area of ​​the smoke pipe (1).

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