Frame trap with deformation unit assembly

Abstract

A flame trap having a deformation unit assembly (300), comprising a flame trap case (101), the flame trap case (101) having a fluid passage (120) restricted therein and an inlet (111) and an outlet (131) communicating with the fluid passage (120), a fire protection unit (200) for preventing flame propagation is provided within the fluid passage (120), and a deformation unit (300) is provided on one side of the fire protection unit (200), the deformation unit (300) being capable of deforming when an internal temperature of the fluid passage (120) reaches a preset temperature so as to reduce a flow area toward an outlet (130) of the fluid passage (120). In this flame trap, a deformation unit (300) is installed on one side of the fire protection unit (200). When sustained combustion is formed in the fire protection unit (200), the deformation unit (300) is heated and deformed, reducing the flow area of ​​the fluid passage (120) on the surface of the fire protection unit (200), thereby accelerating the gas flow rate and forcing the flame to move away from the surface of the fire protection unit (200), forming a jet flame, avoiding the occurrence of flame backflow, and increasing the burning time of the flame trap.

Description

[Technical field]

[0001] The present invention relates to the technical field of fire and explosion protection, and in particular to a flame trap having a deformation unit assembly. [Background technology]

[0002] Flame traps are safety devices that are installed at the inlet and outlet of the device or the pipeline, allowing the medium to flow but blocking the flame and preventing the spread of flame and explosion. Currently, flame traps are mainly of the corrugated plate type, which can block the propagation of deflagration and explosion flames. When a sustained combustion is formed on the fire disk, the heat released from the flame combustion increases the temperature of the fire disk on the non-protected side and is transferred to the protected side through thermal conduction, but the combustible gas can dissipate some of the heat by flowing through the fire disk and cool it down. Specifically, when the flow rate of the combustible gas is relatively fast, it forms a jet flame (like a gas stove) on the fire disk, and the flame has a certain rise and leaves the fire disk, and the cooling rate of the combustible gas is faster than the heating rate of the flame, so there is no backflow of the flame. However, when the flow rate of the combustible gas is relatively slow, the gas will burn on the surface of the fire protection disk, and the speed at which the flame heats the fire protection disk will be greater than the temperature drop rate of the combustible gas, so that the temperature of the fire protection disk will rise continuously, and when it reaches the ignition point of the combustible gas, the gas on the protected side will ignite, the fire protection will fail, and a flame backflow flash explosion will occur. As can be seen from the above, the conventional flame trap usually cannot withstand long-term combustion, and when the combustible gas continuously flows out in the pipeline, it may form a continuous combustion on the surface of the fire protection disk of the flame trap, and the long-term combustion will cause a flame backflow in the flame trap. Summary of the Invention [Problem to be solved by the invention]

[0003] SUMMARY OF THE PRESENT EMBODIMENT The objective of the present invention is to provide a flame trap with a new modified unit assembly to overcome the problem that the flame traps existing in the prior art cannot withstand long-term combustion. [Means for solving the problem]

[0004] In order to achieve the above object, the present invention provides a flame trap having a deformation unit assembly, the flame trap including a flame trap case having a fluid passage restricted therein and an inlet and an outlet communicating with the fluid passage, a fire protection unit for preventing flame propagation is provided within the fluid passage, and a deformation unit is provided on the side of the fire protection unit toward the outlet of the flame trap case, and the deformation unit is configured to be deformable when the internal temperature of the fluid passage reaches a preset temperature so as to reduce the flow area of ​​the fluid passage toward the outlet.

[0005] Preferably, the deformation unit includes a deformation unit assembly including a deformation unit member made of a shape memory alloy, the deformation unit member being attached to a surface of the fire protection unit via a bracket, and the deformation unit member being configured to be deformable at the preset temperature so as to form a gap for fluid to pass through and reduce the cross-sectional area of ​​the gap.

[0006] Preferably, the deformation unit assembly is flower-shaped and includes a plurality of petal-shaped element bodies, the element bodies being the deformation unit members, and under normal operating conditions, the deformation unit assembly is in a contracted state and the plurality of element bodies are closed, and when the internal temperature of the fluid passage reaches the preset temperature, the deformation unit assembly is heated and deformed, and the element bodies are expanded.

[0007] Preferably, the element body has a smoothly curved shape from the bottom up.

[0008] Preferably, the deformation unit member is an elongated body, and a plurality of the elongated bodies are arranged in parallel and spaced apart from each other so that a gap is formed between two adjacent elongated bodies, and when the internal temperature of the fluid passage reaches the predetermined temperature, the elongated bodies are expanded and come into close contact with the side of the fire protection unit.

[0009] Preferably, the elongated body is positioned toward the outlet.

[0010] Preferably, the elongated body is folded along its longitudinal direction, and when the internal temperature of the fluid passage reaches the predetermined temperature, a portion of the elongated body connected to the fire protection unit is in close contact with the side of the fire protection unit, and another portion of the elongated body extends along the longitudinal direction of the fluid passage.

[0011] Preferably, the frame trap case is cylindrical and includes a connected diameter-changing section and a fire-protection section, the inner diameter of the diameter-changing section being configured to increase toward the fire-protection section, the inlet being formed on the side of the diameter-changing section away from the fire-protection section, and the outlet being formed on the side of the fire-protection section away from the diameter-changing section.

[0012] Preferably, the fire protection unit and the transformation unit are installed within the fire protection section, and the transformation unit is located on a side of the fire protection unit closer to the exit.

[0013] Preferably, the variable diameter section includes a straight pipe section and an expanded diameter section which are connected to each other, the expanded diameter section is installed between the straight pipe section and the fire-resistant section, and the inner diameter of the expanded diameter section is configured to become larger toward the fire-resistant section.

[0014] Preferably, the ratio of the maximum diameter of the expanded diameter portion to the diameter of the inlet is 1.2-3.

[0015] Preferably, the frame trap case is cylindrical and includes a first diameter changing section, a fire protection section and a second diameter changing section connected in sequence, the inlet is formed on a side of the first diameter changing section away from the fire protection section and the outlet is formed on a side of the second diameter changing section away from the fire protection section, the inner diameter of the first diameter changing section is configured to become larger toward the fire protection section and the inner diameter of the second diameter changing section is configured to become larger toward the fire protection section.

[0016] Preferably, the fire protection unit and the transformation unit are installed in the fire protection section, the number of the transformation units is two, and the two transformation units are installed on both sides of the fire protection unit, respectively.

[0017] Preferably, the first variable diameter section includes a first straight pipe section and a first enlarged diameter section which are connected to each other, the first enlarged diameter section is installed between the first straight pipe section and the fire-resistant section, and the inner diameter of the first enlarged diameter section is configured to become larger toward the fire-resistant section.

[0018] Preferably, the second variable diameter section includes a second straight pipe section and a second enlarged diameter section which are connected to each other, the second enlarged diameter section is installed between the second straight pipe section and the fire-resistant section, and the inner diameter of the second enlarged diameter section is configured to become larger toward the fire-resistant section.

[0019] Preferably, the fire-stopping portion has a straight pipe shape, and the first straight pipe portion, the second straight pipe portion, the first enlarged diameter portion, and the second enlarged diameter portion are symmetrically installed on both sides of the fire-stopping portion, respectively.

[0020] Preferably, a ratio of the maximum diameter of the first and second expanded diameter portions to the diameter of the inlet is 1.5-3.

[0021] Preferably, the fire protection unit comprises one or more corrugated board fire protection discs.

[0022] Preferably, the preset temperature is between 60°C and 200°C, and more preferably, the preset temperature is between 80°C and 120°C.

[0023] Preferably, the deformation unit is configured to be able to return to its initial state when an internal temperature of the fluid passage is lower than the preset temperature.

[0024] Preferably, the time for the deformation unit to return to the initial state is 1 to 10S, preferably 2 to 5S. Effect of the Invention

[0025] In the flame trap with deformation unit assembly of the present invention, according to the above technical solution, a deformation unit is installed on one side of the fire protection unit, and in normal state, the deformation unit has a small effect on the flow performance of the flame trap, and when a flame backflow flash explosion occurs, the fire protection unit can prevent the flame from propagating to the side close to the inlet, which is the protected side, and the combustible gas continues to flow out from the inlet side, which may form a continuous combustion on the outlet side, and when the fluid temperature on the outlet side reaches a preset temperature, the deformation unit deforms, reducing the flow area of ​​the fluid passage on the surface of the fire protection unit, and with the same combustible gas flow rate, the gas flow rate is increased, forming a jet flame, and the flame leaves the fire protection unit, thereby reducing the impact on the fire protection unit, and preventing the flame from being heated to a high temperature and igniting the combustible gas on the protected side, thereby realizing that the flame trap does not generate a flame backflow in a long-term continuous burning state, and meeting the requirement of long-term fire resistance. Here, the preheating temperature is the deformation temperature of the deformation unit. [Brief description of the drawings]

[0026] [Figure 1] FIG. 2 is a structural schematic diagram of a frame trap having a deformation unit assembly according to the first embodiment of the present invention; [Diagram 2] FIG. 2 is a structural schematic diagram of the deformation unit in FIG. 1 at a deformation temperature. [Diagram 3] FIG. 11 is a structural schematic diagram of a frame trap having a deformation unit assembly according to a second embodiment of the present invention. [Figure 4]FIG. 4 is a structural schematic diagram of the deformation unit in FIG. 3 at a deformation temperature. [Diagram 5] FIG. 11 is a structural schematic diagram of a frame trap having a deformation unit assembly according to a third embodiment of the present invention. [Figure 6] FIG. 6 is a structural schematic diagram of the deformation unit in FIG. 5 at a deformation temperature. [Figure 7] FIG. 11 is a structural schematic diagram of a frame trap having a deformation unit assembly according to a fourth embodiment of the present invention. [Figure 8] FIG. 8 is a structural schematic diagram of the deformation unit in FIG. 7 at a deformation temperature. [Figure 9] FIG. 11 is a structural schematic diagram of a frame trap having a deformation unit assembly according to a fifth embodiment of the present invention. [Figure 10] FIG. 10 is a structural schematic diagram of the deformation unit in FIG. 9 at a deformation temperature. [Figure 11] FIG. 13 is a structural schematic diagram of a frame trap having a deformation unit assembly according to a sixth embodiment of the present invention. [Figure 12] FIG. 12 is a structural schematic diagram of the deformation unit in FIG. 11 at a deformation temperature. [Figure 13] FIG. 13 is a structural schematic diagram of a frame trap having a deformation unit assembly according to the seventh embodiment of the present invention. [Figure 14] FIG. 14 is a structural schematic diagram of the deformation unit in FIG. 13 at a deformation temperature. [Figure 15] FIG. 13 is a structural schematic diagram of a frame trap having a deformation unit assembly according to Example 8 of the present invention. [Figure 16] FIG. 16 is a structural schematic diagram of the deformation unit in FIG. 15 at a deformation temperature. [Figure 17] FIG. 13 is a structural schematic diagram of a frame trap having a deformation unit assembly according to a ninth embodiment of the present invention. [Figure 18] Schematic diagram of the structure of the deformation unit in FIG. 17 at the deformation temperature. [Explanation of symbols]

[0027] 100, Frame Trap 101. Frame trap case 111, entrance 112, 1st straight pipe section 113, 2nd straight pipe section 120, fluid passage 121, 1st enlarged diameter part 122, 2nd enlarged diameter part 130, Fire Prevention Department 131, Exit 200, Fire protection unit 300, transformation unit 310, bracket 320, transformation unit member DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain and illustrate the present invention, and are not used to limit the present invention.

[0029] In this invention, unless stated to the contrary, the directional terms used, e.g. "up, down, left, right" generally mean up, down, left, right as shown with reference to the drawings, and "inside, outside" generally mean inside, outside with respect to the contour of each part itself.

[0030] The present invention provides a flame trap with a deformation unit assembly, the flame trap 100 includes a flame trap case 101, the flame trap case 101 has a fluid passage 120 restricted therein and an inlet 111 and an outlet 131 communicating with the fluid passage 120, the fire protection unit 200 is provided in the fluid passage 120 for preventing flame propagation, the fire protection unit 200 includes one or more corrugated plate fire protection disks, the fire protection unit 200 is a prior art, and will not be described in detail here. The deformation unit 300 is provided on the side of the fire protection unit 200 toward the outlet of the flame trap case 101, the deformation unit 300 is deformable when the internal temperature of the fluid passage 120 reaches a preset temperature, thereby reducing the flow area toward the outlet 131 of the fluid passage, i.e., deforming the deformation unit 300 to a state where the flow area of ​​the fluid passage 120 on the surface of the fire protection unit 200 is reduced, and the flow speed of the fluid is increased. Here, the preset temperature is 60°C to 200°C, and preferably 80°C to 120°C. More preferably, the deformation unit 300 is configured to be able to return to its initial state when the internal temperature of the fluid passage 120 is lower than the preset temperature. Here, the initial state of the deformation unit 300 refers to the state when the deformation unit 300 is not deformed. By using the corresponding design method, it can be ensured that the fluid passage 120 can maintain the original medium flow effect after the temperature is lowered. Here, the time for the deformation unit 300 to return to its initial state is 1 to 10 s, and preferably 2 to 5 s, thereby meeting the needs of use.

[0031] The deformation unit 300 includes a deformation unit assembly, which includes a deformation unit member 320 made of a shape memory alloy, and the deformation unit member 320 is attached to the surface of the fire protection unit 200 via a bracket 310, and the deformation unit member 320 is provided to be deformable at a preset temperature so as to form a gap for fluid to pass through and reduce the cross-sectional area of ​​the gap. Here, gaps are formed between the deformation unit members 320 and between the deformation unit member 320 and the frame trap case 101 in combination, and the installation condition of the deformation unit member 320 should be such that, in a general state, when the deformation unit member 320 is not deformed, the gaps formed between the deformation unit members 320 and between the deformation unit member 320 and the frame trap case 101 in combination are uniformly distributed, ensuring the normal flow of fluid and reducing the impact of the deformation unit member 320 on the fluid flow. When the fluid temperature at the outlet 131 side reaches a preset temperature, the deformation unit members 320 deform and further deform the gaps, reducing the gaps formed between the deformation unit members 320 and between the deformation unit members 320 and the flame trap case 101, but it is necessary to maintain the gaps after deformation to be distributed evenly, so as to prevent the phenomenon of flame backflow caused by the temperature being too high locally. Shape memory alloys, abbreviated as SMA (Shape Memory Alloys), are alloy materials that can completely remove the deformation that occurred at a low temperature after being heated and heated, and can recover the original shape before the deformation. According to the shape memory effect, they are divided into one-way shape memory alloys, two-way shape memory alloys, and omnidirectional memory alloys, which are conventional techniques and will not be described in detail here. Preferably, the deformation unit 300 uses a nickel-titanium shape memory alloy, and the Ni content in the nickel-titanium shape memory alloy is 45% to 55%, which meets the needs of use. A third element is added to the nickel-titanium shape memory alloy, and the third element includes one or more of zirconium, iron, copper, manganese, and niobium, and the content of the third element is 0 to 20%.

[0032] In order to achieve the purpose of extinguishing the flame, currently, most flame traps 100 are made of solid materials with many fine, uniform or non-uniform passages or pores through which gas can pass, and these passages or pores are required to be small enough to allow the flame to pass through. In this way, after the flame enters the flame trap 100, it is divided into many small flame streams and extinguished. That is, the mechanism by which the flame can be extinguished is the heat transfer effect and the wall effect. First, the heat transfer effect is that the heat transfer area of ​​the passage or pore is large, so that after the flame exchanges heat through the passage wall, the temperature drops, and when it reaches a certain level, the flame is extinguished. Second, the wall effect is that as the size of the passage of the flame trap 100 decreases, the probability of collision between the radicals and the reacting molecules decreases, but the probability of collision between the radicals and the passage wall increases. When the size of the passage decreases to a certain value, this wall effect creates a condition in which the flame cannot continue, and the flame is blocked.

[0033] Based on the above fire protection principle of the flame trap 100, it can be seen that the present invention can realize the division of the fire protection performance and flow performance of the flame trap 100 under different temperature conditions, and is realized by utilizing the deformation characteristics of the memory alloy at different temperatures. Specifically, when it is necessary to utilize the high-efficiency flow performance of the flame trap 100 under normal operating conditions, i.e., under normal temperature conditions, a highly fluid structure is manufactured with a material having shape memory function; when it is necessary to utilize the fire protection performance of the flame trap 100 under abnormal operating conditions, i.e., under deformation temperature, when the material having shape memory function is affected by the burning of fire, the temperature rises, the structure changes, and the size of the gap further decreases. In addition, since the deformation unit assembly in the flame trap 100 in the present invention uses a shape memory alloy, it has the characteristic of having a longer fire resistance time than the fire protection core in the prior art.

[0034] The operation process of the frame trap 100 of the present invention is as follows.

[0035] Under normal temperature conditions, the multiple transformable unit members 320 are processed into a designed shape and fixed to the side of the fire protection unit 200 facing the outlet 131 via the bracket 310, so that a gap is formed in the transformable unit member 320, and the fluid in the external pipe enters from the inlet 111, passes through the fire protection unit 200, then passes through the transformable unit member 320, and flows out from the outlet 131. At this time, the flow performance is high and the pressure drop is small.

[0036] When the deflagration flame in the external pipe enters the flame trap 100 and forms a sustained combustion on the outlet 131 side, the temperature inside the fluid passage 120 becomes high, the deformation unit member 320 is heated and the temperature rises, enters the deformation temperature, and when it reaches the change temperature, the deformation unit member 320 deforms and expands, reducing the gap in the fluid passage 120, accelerating the flow rate of the fluid, forming an injection flame, and the flame leaves the fire protection unit 200.

[0037] When the temperature returns to normal conditions, the deformation unit members 320 revert to their initial state and reform the fluid-permeable gaps to facilitate fluid passage therethrough. Therefore, it can be seen from the above operation process that in the present invention, the deformation unit 300 is installed on one side of the fire protection unit 200, and under normal conditions, the deformation unit 300 has little effect on the flow performance of the flame trap 100. When a flame backflow flash explosion occurs, the fire protection unit 200 can prevent the flame from propagating to the side closer to the inlet 111, which is the protected side. If the combustible gas continues to flow out from the inlet 111 side, it may form a continuous combustion on the outlet 131 side. When the fluid temperature on the outlet 131 side reaches a preset temperature, the deformation unit 300 will deform, reducing the flow area of ​​the fluid passage 120 on the surface of the fire protection unit 200, and with the same combustible gas flow rate, the gas flow rate will be increased, forming an injection flame, and the flame will move away from the fire protection unit 200, thereby reducing the impact on the fire protection unit 200, and preventing the flame from being heated to a high temperature and igniting the combustible gas on the protected side. This realizes that the flame trap 100 will not generate a flame backflow in a long-term continuous burning state, and meets the requirement of long-term fire resistance. Here, the preheating temperature is the deformation temperature of the deformation unit 300.

[0038] In some embodiments, as shown in Figs. 1 to 6, the frame trap case 101 is cylindrical and includes a connected diameter-changing section and a fire-stopping section 130, the inner diameter of the diameter-changing section is configured to increase toward the fire-stopping section 130, an inlet 111 is formed on the side of the diameter-changing section away from the fire-stopping section 130, and an outlet 131 is formed on the side of the fire-stopping section 130 away from the diameter-changing section. The fire-stopping unit 200 and the deformation unit 300 are installed in the fire-stopping section 130, and the deformation unit 300 is located on the side of the fire-stopping unit 200 closer to the outlet 131. Furthermore, the diameter-changing section includes a connected straight pipe section and an expanded diameter section, the expanded diameter section is installed between the straight pipe section and the fire-stopping section 130, and the inner diameter of the expanded diameter section is configured to increase toward the fire-stopping section 130. Furthermore, the ratio of the maximum diameter of the expanded diameter section to the diameter of the inlet 111 is 1.2 to 3. In this design, the frame trap case 101 has a reasonable structure and ensures the flow efficiency of the fluid.

[0039] In some other embodiments, as shown in Fig. 7 to Fig. 18, the flame trap case 101 is cylindrical and includes a first diameter change section, a fire protection section 130, and a second diameter change section that are connected in order, an inlet 111 is formed on the side of the first diameter change section away from the fire protection section 130, an outlet 131 is formed on the side of the second diameter change section away from the fire protection section 130, the inner diameter of the first diameter change section is configured to become larger toward the fire protection section 130, and the inner diameter of the second diameter change section is configured to become larger toward the fire protection section 130. The fire protection unit 200 and the transformation unit 300 are installed in the fire protection section 130, and there are two transformation units 300, and the two transformation units 300 are installed on both sides of the fire protection unit 200, respectively, to realize long-term combustion in two directions. Further, the first diameter-changing section includes a first straight pipe section 112 and a first enlarged diameter section 121 that are connected to each other, the first enlarged diameter section 121 is disposed between the first straight pipe section 112 and the fire-stopping section 130, and the inner diameter of the first enlarged diameter section 121 is configured to increase toward the fire-stopping section 130. Further, the second diameter-changing section includes a second straight pipe section 113 and a second enlarged diameter section 122 that are connected to each other, the second enlarged diameter section 122 is disposed between the second straight pipe section 113 and the fire-stopping section 130, and the inner diameter of the second enlarged diameter section 122 is configured to increase toward the fire-stopping section 130. Further, the fire-stopping section 130 is a straight pipe, and the first straight pipe section 112 and the second straight pipe section 113, the first enlarged diameter section 121 and the second enlarged diameter section 122 are disposed symmetrically on both sides of the fire-stopping section 130, respectively. Furthermore, the ratio of the maximum diameter of first enlarged diameter portion 121 and second enlarged diameter portion 122 to the diameter of inlet 111 is 1.5-3.

[0040] As can be seen from this, the specific installation manner of the flame trap case 101 is not limited, as long as it meets the usage needs and ensures the flow effect of the fluid.

[0041] Example 1 As shown in Fig. 1 and Fig. 2, the deformation unit assembly is flower-shaped and includes a plurality of petal-shaped element bodies, and the element body is the deformation unit member 320. As shown in Fig. 1, in normal operation, the deformation unit assembly is in a contracted state, and the plurality of element bodies are closed to reduce the influence on the fluid flow. As shown in Fig. 2, when the internal temperature of the fluid passage 120 reaches a preset temperature, the deformation unit assembly is heated and deformed, and the element body is expanded, which expands the deformation unit assembly to form a lotus shape, further increasing the cross-sectional area of ​​the deformation unit assembly, further reducing the size of the gap, and increasing the fluid velocity, where the ratio value between the maximum diameter of the expansion part and the diameter of the inlet 111 is 1.2-2, which meets the needs of use. More preferably, the element body has a shape that is smoothly curved from the bottom to the top, and this design method can guide the flame flow field, and at a low flow rate of the combustible gas, the flame is moved away from the fire protection unit 200, and the element bodies are uniformly distributed along the radial direction to prevent local overheating and the occurrence of the phenomenon of flame backflow. As shown in Figures 1 and 2, the flame trap case 101 in this embodiment is cylindrical, and includes a connected diameter change part and a fire protection part 130, and the inner diameter of the diameter change part is configured to increase toward the fire protection part 130, and an inlet 111 is formed on the side of the diameter change part away from the fire protection part 130, and an outlet 131 is formed on the side of the fire protection part 130 away from the diameter change part.

[0042] Example 2 As shown in FIG. 3 and FIG. 4, the deformation unit member 320 is an elongated body, and a plurality of elongated bodies are installed in parallel, and the plurality of elongated bodies are respectively attached to the fire protection unit 200 via the bracket 310, and the plurality of elongated bodies are installed at intervals from each other, and the distance between each two adjacent elongated bodies is the same, so that a uniform gap is formed between the two adjacent elongated bodies. In a general state, the elongated body is installed toward the direction of the outlet 131, so that the elongated body acts as a guide for the flow of the fluid. When the internal temperature of the fluid passage 120 reaches a preset temperature, the elongated body is expanded and adheres to the side of the fire protection unit 200, and further brings the side of the elongated body into contact with the fire protection unit 200, further reducing the area through which the fluid flows through the fire protection unit 200, and further increasing the flow speed of the fluid. Furthermore, the ratio value between the maximum diameter of the expansion part and the diameter of the inlet 111 is 1.2 to 2, so that the flame trap case 101 can meet the needs of use. After the elongated bodies are deployed and come into close contact with the side surface of the fire protection unit 200, there should be a gap between two adjacent elongated bodies to avoid completely blocking the fluid passage 120. As shown in Figures 3 and 4, the frame trap case 101 in this embodiment is cylindrical, and includes a diameter-changing section and a fire-protecting section 130 to be connected, and the inner diameter of the diameter-changing section is configured to become larger toward the fire-protecting section 130, and an inlet 111 is formed on the side of the diameter-changing section away from the fire-protecting section 130, and an outlet 131 is formed on the side of the fire-protecting section 130 away from the diameter-changing section.

[0043] Example 3 As shown in Fig. 5 and Fig. 6, the difference from the second embodiment is as follows. In this embodiment, the elongated body is folded along its longitudinal direction, and in a general state, the elongated body is arranged toward the outlet 131, so that the elongated body guides the flow of the fluid. When the internal temperature of the fluid passage 120 reaches a preset temperature, a part of the elongated body connected to the fire protection unit 200 is in close contact with the side of the fire protection unit 200, and another part of the elongated body extends along the longitudinal direction of the fluid passage 120 to guide the flame flow field. In some other embodiments, the elongated body is folded along its longitudinal direction to form two elongated body bodies arranged in parallel, that is, the connection points of the two elongated body bodies are cut, and the two elongated body bodies arranged in parallel are both connected to the fire protection unit 200 via the bracket 310. Here, the deformation temperatures of the two elongated body bodies may be different, and the deformation temperature of one of the elongated body bodies is higher than the preset temperature. A continuous combustion is formed on the outlet 131 side, and when the temperature reaches a preset temperature, the elongated body with a lower deformation temperature is deformed and adheres to the side of the fire protection unit 200, and the other elongated body can guide the flame flow field and move the flame away from the fire protection unit 200 with a low flow rate of combustible gas. The deformation temperatures of the two elongated bodies may be the same, and a continuous combustion is formed on the outlet 131 side, and when the temperature reaches a preset temperature, both of the two elongated bodies are deformed and adhere to the side of the fire protection unit 200, and similarly, there should be a gap between the two adjacent elongated bodies after deformation. As shown in Figures 5 and 6, the frame trap case 101 in this embodiment is cylindrical, and includes a connected diameter-changing section and a fire-protection section 130. The inner diameter of the diameter-changing section is configured to increase toward the fire-protection section 130, and an inlet 111 is formed on the side of the diameter-changing section away from the fire-protection section 130, and an outlet 131 is formed on the side of the fire-protection section 130 away from the diameter-changing section.

[0044] Example 4 As shown in Figures 7 and 8, the installation method of the deformation unit 300 in this embodiment is the same as that of the deformation unit 300 in the first embodiment, so it will not be described in detail here. The differences from the first embodiment are as follows. The frame trap case 101 in this embodiment is cylindrical, and the frame trap case 101 includes a first diameter change part, a fire protection part 130, and a second diameter change part that are connected in order, and an inlet 111 is formed on the side of the first diameter change part away from the fire protection part 130, and an outlet 131 is formed on the side of the second diameter change part away from the fire protection part 130, and the inner diameter of the first diameter change part is configured to become larger toward the fire protection part 130, and the inner diameter of the second diameter change part is configured to become larger toward the fire protection part 130. As can be seen from the above, the deformation unit 300 of the corresponding installation method can be applied to various frame traps 100.

[0045] Example 5 9 and 10, the installation manner of the deformation unit 300 and the flame trap case 101 in this embodiment is the same as that in the fourth embodiment, so it will not be described in detail here. The difference from the fourth embodiment is that the deformation unit 300 is provided on both sides of the fire protection unit 200 in this embodiment, so that a long-term combustion in two directions can be realized.

[0046] Example 6 As shown in Figures 11 and 12, the installation method of the deformation unit 300 in this embodiment is the same as that of the deformation unit 300 in the second embodiment, so it will not be described in detail here. The differences from the second embodiment are as follows. The frame trap case 101 in this embodiment is cylindrical, and includes a first diameter change part, a fire protection part 130, and a second diameter change part that are connected in order, an inlet 111 is formed on the side of the first diameter change part away from the fire protection part 130, and an outlet 131 is formed on the side of the second diameter change part away from the fire protection part 130, and the inner diameter of the first diameter change part is configured to become larger toward the fire protection part 130, and the inner diameter of the second diameter change part is configured to become larger toward the fire protection part 130. As can be seen from the above, the deformation unit 300 of the corresponding installation method can be applied to various frame traps 100.

[0047] Example 7 13 and 14, the installation manner of the deformation unit 300 and the flame trap case 101 in this embodiment is the same as that in the sixth embodiment, so it will not be described in detail here. The difference from the sixth embodiment is that the deformation unit 300 is provided on both sides of the fire protection unit 200 in this embodiment, so that a long-term combustion in two directions can be realized.

[0048] Example 8 As shown in Figures 15 and 16, the installation method of the deformation unit 300 in this embodiment is the same as that of the deformation unit 300 in the third embodiment, so it will not be described in detail here. The differences from the third embodiment are as follows. The frame trap case 101 in this embodiment is cylindrical, and includes a first diameter change part, a fire protection part 130, and a second diameter change part that are connected in order, an inlet 111 is formed on the side of the first diameter change part away from the fire protection part 130, and an outlet 131 is formed on the side of the second diameter change part away from the fire protection part 130, and the inner diameter of the first diameter change part is configured to become larger toward the fire protection part 130, and the inner diameter of the second diameter change part is configured to become larger toward the fire protection part 130. As can be seen from the above, the deformation unit 300 of the corresponding installation method can be applied to various frame traps 100.

[0049] Example 9 The installation manner of the deformation unit 300 and the flame trap case 101 in this embodiment is the same as that in the eighth embodiment, so it will not be described in detail here. The difference from the eighth embodiment is that the deformation unit 300 is provided on both sides of the fire protection unit 200 in this embodiment, so that a long-term combustion in two directions can be realized.

[0050] Therefore, the present invention installs a deformation unit 300 made of a shape memory alloy on the side of the fire protection unit 200 of the flame trap 100, so that when a flame backflow flash explosion occurs, the gas flow speed can be increased and the flame can move away from the fire protection unit 200, thereby realizing that the flame trap 100 will not generate flame backflow even in a long-term sustained burning state, and meeting the requirement of long-term fire resistance.

[0051] Although the preferred embodiments of the present invention have been described in detail above with reference to the drawings, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention. In order to avoid unnecessary repetition, the present invention does not specifically describe various possible combination methods. However, these simple modifications and combinations should also be regarded as the disclosure of the present invention, and all fall within the protection scope of the present invention.

Claims

1. A flame trap having a deformation unit assembly, the flame trap (100) including a flame trap case (101), the flame trap case (101) having a fluid passage (120) restricted therein and an inlet (111) and an outlet (131) communicating with the fluid passage (120), a fire protection unit (200) for preventing flame propagation is provided within the fluid passage (120), a deformation unit (300) is provided on a side of the fire protection unit (200) facing the outlet (131) of the flame trap case (101), the deformation unit (300) being deformable when an internal temperature of the fluid passage (120) reaches a preset temperature so as to reduce a flow area of ​​the fluid passage (120) facing the outlet (131), The deformation unit (300) includes a deformation unit assembly, the deformation unit assembly including a deformation unit member (320) made of a shape memory alloy, the deformation unit member (320) being attached to a surface of the fire protection unit (200) via a bracket (310), a gap for a fluid to pass through is formed, and the deformation unit member (320) is provided to be deformable at the preset temperature so as to reduce a cross-sectional area of ​​the gap; The deformation unit member (320) is an elongated body, and a plurality of the elongated bodies are arranged in parallel so that the gap is formed between two adjacent elongated bodies, and the plurality of the elongated bodies are arranged at intervals from each other, and when the internal temperature of the fluid passage (120) reaches the preset temperature, the elongated bodies are expanded and come into close contact with the side of the fire protection unit (200); A flame trap with a deformation unit assembly, characterized in that the elongated body is folded along its longitudinal direction, and when the internal temperature of the fluid passage (120) reaches the predetermined temperature, a portion of the elongated body connected to the fire protection unit (200) is in close contact with the side of the fire protection unit (200), and another portion of the elongated body extends along the longitudinal direction of the fluid passage (120).

2. A frame trap having a deformation unit assembly as described in claim 1, characterized in that the transformation unit assembly is flower-shaped and includes a plurality of petal-shaped element bodies, the element bodies being the transformation unit members (320), and under normal operating conditions, the transformation unit assembly is in a contracted state and the plurality of element bodies are closed, and when the internal temperature of the fluid passage (120) reaches the predetermined temperature, the transformation unit assembly is heated and deformed, and the element bodies are expanded.

3. A frame trap having a deformation unit assembly as described in claim 2, characterized in that the element body has a smoothly curved shape from the bottom up.

4. A frame trap having a deformation unit assembly as described in claim 1, characterized in that the elongated body is installed toward the outlet (131).

5. A frame trap having a deformation unit assembly described in any one of claims 1 to 4, characterized in that the frame trap case (101) is cylindrical and includes a connected diameter-changing section and a fire-protection section (130), the inner diameter of the diameter-changing section is configured to increase toward the fire-protection section (130), the inlet (111) is formed on the side of the diameter-changing section away from the fire-protection section (130), and the outlet (131) is formed on the side of the fire-protection section (130) away from the diameter-changing section.

6. A frame trap having a deformation unit assembly as described in claim 5, characterized in that the fire protection unit (200) and the deformation unit (300) are installed within the fire protection section (130), and the deformation unit (300) is located on the side of the fire protection unit (200) closer to the outlet (131).

7. A frame trap having a deformation unit assembly as described in claim 5, characterized in that the variable diameter section includes a straight pipe section and an expanded diameter section which are connected, the expanded diameter section is installed between the straight pipe section and the fire-resistant section (130), and the inner diameter of the expanded diameter section is configured to become larger toward the fire-resistant section (130).

8. A frame trap having a deformation unit assembly as described in claim 7, characterized in that the ratio of the maximum diameter of the expansion portion to the diameter of the inlet (111) is 1.2 to 3.

9. A frame trap having a deformation unit assembly described in any one of claims 1 to 4, characterized in that the frame trap case (101) is cylindrical and includes a first changing diameter section, a fire-resistant section (130) and a second changing diameter section which are connected in that order, the inlet (111) is formed on the side of the first changing diameter section away from the fire-resistant section (130) and the outlet (131) is formed on the side of the second changing diameter section away from the fire-resistant section (130), the inner diameter of the first changing diameter section is configured to increase toward the fire-resistant section (130), and the inner diameter of the second changing diameter section is configured to increase toward the fire-resistant section (130).

10. A frame trap having a deformation unit assembly as described in claim 9, characterized in that the fire protection unit (200) and the deformation unit (300) are installed within the fire protection section (130), the deformation units (300) are two, and the two deformation units (300) are installed on both sides of the fire protection unit (200), respectively.

11. A frame trap having a deformation unit assembly as described in claim 9, characterized in that the first variable diameter section includes a first straight pipe section (112) and a first enlarged diameter section (121) connected to each other, the first enlarged diameter section (121) is installed between the first straight pipe section (112) and the fire-resistant section (130), and the inner diameter of the first enlarged diameter section (121) is configured to become larger toward the fire-resistant section (130).

12. A frame trap having a deformation unit assembly as described in claim 11, characterized in that the second variable diameter section includes a second straight pipe section (113) and a second expanded diameter section (122) connected to each other, the second expanded diameter section (122) is installed between the second straight pipe section (113) and the fire-resistant section (130), and the inner diameter of the second expanded diameter section (122) is configured to become larger toward the fire-resistant section (130).

13. A frame trap having a deformation unit assembly as described in Claim 12, characterized in that the fire-protection section (130) is straight tubular, and the first straight tubular section (112) and the second straight tubular section (113), and the first enlarged diameter section (121) and the second enlarged diameter section (122) are respectively installed symmetrically on both sides of the fire-protection section (130).

14. A frame trap having a deformation unit assembly as described in Claim 12, characterized in that the ratio of the maximum diameter of the first expansion portion (121) and the second expansion portion (122) to the diameter of the inlet (111) is 1.5 to 3.

15. A flame trap having a deformation unit assembly as described in any one of claims 1 to 14, characterized in that the fire protection unit (200) includes one or more corrugated plate fire protection discs.

16. A frame trap having a deformation unit assembly described in any one of claims 1 to 14, characterized in that the predetermined temperature is between 60°C and 200°C.

17. A flame trap having a deformation unit assembly as described in claim 16, characterized in that the predetermined temperature is between 80°C and 120°C.

18. A frame trap having a deformation unit assembly described in any one of claims 1 to 14, characterized in that the deformation unit (300) is configured to be able to return to its initial state when the internal temperature of the fluid passage (120) is lower than the predetermined temperature.

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