End flow type fire stop interceptor and manufacturing method thereof

Abstract

The present invention provides an end-flow fire stop interceptor and a manufacturing method thereof, which relate to the technical field of magnesium smelting, and solve the technical problems in the prior art that the existing magnesium smelting fire stop plates do not have a filtering function and have poor heat-resistance effect. The end-flow fire stop interceptor includes an interceptor body, and annular flow channels are sequentially sleeved in the interior of the interceptor body along the radial direction from the inside to the outside, and adjacent annular flow channels are connected in sequence; the interceptor body is relatively provided with an inlet side and an outlet side, and the inlet side is circumferentially provided with a first flow hole, and the first flow hole is connected to the outermost annular flow channel; the outlet side is provided with a second flow hole, and the second flow hole is connected to the innermost annular flow channel; under the premise of smooth circulation of magnesium vapor, the present invention forms a cooling step to ensure the heat radiation blocking effect while effectively filtering impurities in the magnesium vapor and improving the quality of magnesium smelting.

Description

Technical Field

[0001] The present invention relates to the technical field of magnesium smelting, and in particular to an end-flow type fire-blocking interceptor and a manufacturing method thereof. Background Art

[0002] Existing metal smelting furnaces are usually equipped with a fire baffle inside to block thermal radiation from the high-temperature cavity in the metal smelting furnace. The existing fire baffle is evenly distributed with a number of through holes. During use, magnesium vapor flows through the through holes and eventually enters the crystallization cavity. During this process, the fire baffle can play a role in blocking thermal radiation to a certain extent. However, the existing fire baffle not only has a poor heat radiation blocking effect, but also cannot filter impurities in the magnesium vapor, affecting the quality of magnesium smelting. Summary of the Invention

[0003] The purpose of the present invention is to provide an end-flow fire interceptor and a manufacturing method thereof, so as to solve the technical problems in the prior art that the existing magnesium smelting fire shield has no filtering function and poor heat insulation effect; the preferred technical scheme among the many technical schemes provided by the present invention can produce many technical effects (the first interceptor and the second interceptor are both arranged as a barrel structure, which can form a guide chamber, and have the function of filtering impurities in magnesium vapor through the annular flow channel inside it; the opening end of the first interceptor is provided with a first annular edge groove along the edge, and the opening end of the second interceptor is provided with a second annular edge groove, and the first annular edge groove and the second annular edge groove form a welding groove, which is convenient for welding the first interceptor and the second interceptor, and is easy to install. At the same time, with this structural method, the first interceptor and the second interceptor can be batch cast, effectively reducing Low production cost; the cross-sectional shape of the welding groove is set to be V-shaped for easy processing; the first intercepting body is provided with a first guide sleeve, and the second intercepting body is provided with a second guide sleeve, which can form a curved flow channel along the axial direction, which is convenient for the formation of a cooling gradient; according to the different numbers of the first guide sleeve and the second guide sleeve, a variety of specifications and structures can be formed; the first flow hole is provided on the first intercepting body, and one side of the first intercepting body forms the inlet side, and the second flow hole is provided on the second intercepting body, and one side of the second intercepting body forms the outlet side; the edge of the second intercepting body is provided with an annular flange, and the annular flange is used for the installation of an end-flow fire interceptor; the first flow hole is provided as an oblong hole to facilitate the entry of magnesium vapor, and the second flow hole is provided with a chamfer to facilitate the discharge of magnesium vapor, and the entire end-flow fire interceptor has smooth flow, etc.); see the following for details.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The present invention provides an end-flow fire interceptor, comprising an interceptor body, wherein: annular flow channels are sequentially sleeved inside the interceptor body along the radial direction from the inside to the outside, and adjacent annular flow channels are sequentially connected; the interceptor body is relatively provided with an inlet side and an outlet side, the inlet side is circumferentially provided with a first flow hole, the first flow hole is connected to the outermost annular flow channel; the outlet side is provided with a second flow hole, the second flow hole is connected to the innermost annular flow channel.

[0006] Preferably, the interceptor body includes a first intercepting body and a second intercepting body, wherein: the first intercepting body is configured as a barrel structure with one end open; the second intercepting body is configured as a barrel structure with one end open; the open end of the first intercepting body is connected to the open end of the second intercepting body to form a diversion chamber, and the annular flow channel is arranged in the diversion chamber.

[0007] Preferably, a first annular edge groove is provided along the edge of the opening end of the first intercepting body, and a second annular edge groove is provided along the edge of the opening end of the second intercepting body, and the first annular edge groove and the second annular edge groove form a welding groove.

[0008] Preferably, the cross-sectional shape of the welding groove is set to be V-shaped.

[0009] Preferably, a first flow guide sleeve is provided inside the first intercepting body, and a second flow guide sleeve is provided inside the second intercepting body, wherein: the inner cavity of the second flow guide sleeve axially penetrates the second intercepting body, one end port of the second flow guide sleeve forms the second flow hole, and the other end port of the second flow guide sleeve is located inside the first flow guide sleeve.

[0010] Preferably, the number of the first guide sleeves is set to be multiple, all of the first guide sleeves are sequentially sleeved from the inside to the outside in the radial direction, and a first annular clamping cavity is formed between adjacent first guide sleeves; the number of the second guide sleeves is set to be multiple, all of the second guide sleeves are sequentially sleeved from the inside to the outside in the radial direction, and a second annular clamping cavity is formed between adjacent second guide sleeves, and the inner cavity of the innermost second guide sleeve axially penetrates the second intercepting body; the first guide sleeve is inserted into the second annular clamping cavity, and the second guide sleeve is inserted into the first annular clamping cavity to form the annular flow channels that are sequentially sleeved.

[0011] Preferably, the first flow holes are uniformly arranged in the circumferential direction on a side of the first intercepting body away from the second intercepting body; and the second flow holes are arranged on a side of the second intercepting body away from the first intercepting body.

[0012] Preferably, the second intercepting body extends outwardly away from a side edge of the first intercepting body and forms an annular flange.

[0013] Preferably, the first flow hole is configured as an oblong hole.

[0014] The present invention provides a method for manufacturing an end-flow fire interceptor, which comprises at least the following steps:

[0015] Step I: obtaining a first intercepting body with a first guide sleeve disposed therein by casting;

[0016] A second intercepting body with a second guide sleeve provided therein is obtained by casting;

[0017] Step II: fitting the open end of the first intercepting body to the open end of the second intercepting body, so that the first annular edge groove and the second annular edge groove form a welding groove;

[0018] Step III: Welding along the welding groove to connect the first interception body and the second interception body, and the end-flow fire stop interceptor is manufactured.

[0019] The end-flow fire interceptor and its manufacturing method provided by the present invention have at least the following beneficial effects:

[0020] The end-flow fire-blocking interceptor comprises an interceptor body, which is installed in a metal smelting furnace.

[0021] Annular flow channels are radially arranged in sequence inside the interceptor body, and adjacent annular flow channels are connected in sequence. When magnesium vapor flows through the annular flow channels, the annular flow channels can form a temperature reduction gradient, which can not only effectively block thermal radiation, but also allow impurities in the magnesium vapor to crystallize in the interceptor body through the gradual reduction of temperature, thereby filtering impurities and improving the quality of magnesium smelting.

[0022] The interceptor body is relatively provided with an inlet side and an outlet side, the inlet side is circumferentially evenly provided with a first flow hole, the first flow hole is connected to the outermost annular flow channel, the outlet side is provided with a second flow hole, the second flow hole is connected to the innermost annular flow channel. During use, magnesium vapor flows in through the first flow hole and flows out through the second flow hole. The first flow holes evenly provided circumferentially make the inflow of magnesium vapor more uniform and have good fluidity.

[0023] The end-flow fire interceptor of the present invention forms a cooling step under the premise of smooth magnesium vapor circulation, thereby ensuring the heat radiation blocking effect and effectively filtering impurities in the magnesium vapor, thereby improving the quality of magnesium smelting.

[0024] The manufacturing method of the end-flow fire interceptor includes step I of casting, wherein a first interception body and a second interception body are obtained by casting, which has a simple process and low cost; step II of docking and assembling, wherein the annular edge grooves of the first interception body and the second interception body correspond to each other, which is convenient for subsequent welding; and step III of welding along the welding groove. On the one hand, welding is used to firmly connect the first interception body and the second interception body, and on the other hand, the welding groove limits the welding position, which is convenient to operate and accurate in welding, effectively ensuring product quality.

[0025] The manufacturing method of the end-flow type fire interceptor of the present invention not only has a simple overall manufacturing process, convenient manufacturing, stable quality, and is convenient for mass production, but also has low cost and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a schematic structural diagram of the present invention;

[0028] Figure 2 It is a structural schematic diagram of another perspective of the present invention;

[0029] Figure 3 is a schematic cross-sectional view of embodiment 1 of the present invention;

[0030] Figure 4 is a schematic cross-sectional view of embodiment 2 of the present invention;

[0031] Figure 5 is a schematic cross-sectional view of a first intercepting body according to embodiment 2 of the present invention;

[0032] Figure 6 is a schematic cross-sectional view of a second intercepting body according to embodiment 2 of the present invention;

[0033] Figure 7 It is a process diagram of the manufacturing method of the present invention;

[0034] Figure 8 This is a temperature curve diagram of Example 1 of the present invention;

[0035] Figure 9 This is a temperature curve diagram of Example 2 of the present invention;

[0036] Figure 10 This is a temperature measurement curve of the steam outlet with and without the interceptor at 1200°C in the present invention;

[0037] Figure 11 This is a temperature measurement curve of the steam outlet with and without the interceptor under the condition of 1260°C of the present invention;

[0038] Figure 12 This is a bar graph showing the effect of the interceptor of the present invention on the content of various impurities in magnesium vapor heated at 1200°C;

[0039] Figure 13 This is a bar graph showing the effect of the interceptor of the present invention on the content of various impurities in magnesium vapor under heating conditions at 1260°C;

[0040] Figure 14 This is a bar graph showing the effect of different heating temperature conditions on the element content in crystalline magnesium when using an interceptor according to the present invention.

[0041] Reference numerals

[0042] 1. Interceptor body; 11. First interceptor body; 111. First flow hole; 112. First flow guide sleeve; 113. First annular cavity; 114. First annular edge groove; 12. Second interceptor body; 121. Second flow hole; 122. Second flow guide sleeve; 123. Annular flange; 124. Second annular cavity; 125. Second annular edge groove; 126. Chamfer; 2. Annular flow channel. DETAILED DESCRIPTION

[0043] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0044] Example 1:

[0045] The present invention provides an end-flow fire interceptor, such as Figure 1-Figure 3 As shown, the end-flow fire interceptor includes an interceptor body 1, and annular flow channels 2 are sequentially sleeved inside the interceptor body 1 along the radial direction from the inside to the outside, and adjacent annular flow channels 2 are sequentially connected.

[0046] The interceptor body 1 is relatively provided with an inlet side and an outlet side. The first flow holes 111 are evenly arranged on the periphery of the inlet side. The first flow holes 111 are connected to the outermost annular flow channel 2.

[0047] The outlet side is provided with a second flow hole 121 , which is connected to the innermost annular flow channel 2 .

[0048] The end-flow fire interceptor is arranged in a metal smelting furnace. When in use, magnesium vapor enters the outermost annular flow channel 2 through the first flow hole 111 , then flows to the innermost annular flow channel 2 , and flows out through the second flow hole 121 .

[0049] In the above process, the magnesium vapor is cooled in stages, which can block the heat radiation in the high temperature zone of the metal smelting furnace on the one hand, and on the other hand, the impurities in the magnesium vapor can be crystallized in the annular flow channel 2, thereby filtering the impurities.

[0050] The invention not only has the function of blocking heat radiation, but also can filter impurities contained in magnesium vapor, thereby improving the quality of magnesium smelting.

[0051] As the impurities continue to solidify, the end-flow fire interceptor needs to be cleaned regularly or directly replaced with a new one.

[0052] As an optional embodiment, Figure 3 As shown, the interceptor body 1 includes a first interception body 11 and a second interception body 12, and the first interception body 11 and the second interception body 12 are cast.

[0053] The first intercepting body 11 is configured as a barrel structure with one end open.

[0054] The second intercepting body 12 is configured as a barrel structure with one end open.

[0055] The open end of the first intercepting body 11 is connected to the open end of the second intercepting body 12 to form a flow guiding chamber, and the annular flow channel 2 is provided in the flow guiding chamber.

[0056] The separate arrangement at the first intercepting body 11 and the second intercepting body 12 facilitates production and assembly.

[0057] As an optional embodiment, Figure 3 As shown, a first annular edge groove 114 is provided along the edge of the open end of the first intercepting body 11, and a second annular edge groove 125 is provided along the edge of the open end of the second intercepting body 12. The first annular edge groove 114 and the second annular edge groove 125 are matched in size, and the two can form a welding groove for easy welding.

[0058] As an optional embodiment, Figure 3 As shown, the cross-sectional shape of the welding groove is set to be V-shaped.

[0059] Similarly, the cross-sectional shape of the welding groove can also be set to be an arc shape, etc.

[0060] As an optional embodiment, the first flow holes 111 are uniformly arranged circumferentially on a side of the first intercepting body 11 away from the second intercepting body 12 , and the side of the first intercepting body 11 away from the second intercepting body 12 forms the inlet side.

[0061] The second flow hole 121 is provided at a middle position of a side of the second intercepting body 12 away from the first intercepting body 11 , and the side of the second intercepting body 12 away from the first intercepting body 11 forms the outlet side.

[0062] As an optional embodiment, Figure 3 As shown, the second intercepting body 12 extends outward from one side edge of the first intercepting body 11 and forms an annular flange 123. The annular flange 123 is used for installing the end-flow fire stop interceptor.

[0063] As an optional embodiment, Figure 1 As shown, the first flow hole 111 is configured as an oblong hole.

[0064] like Figure 2 As shown, the second flow hole 121 is configured as a circular hole.

[0065] As an optional embodiment, Figure 1 and Figure 3 As shown, the second flow hole 121 is provided with a chamfer 126 , and the chamfer 126 is a round chamfer.

[0066] As an optional embodiment, Figure 3 As shown, a first flow guide sleeve 112 is provided inside the first intercepting body 11 , and a second flow guide sleeve 122 is provided inside the second intercepting body 12 .

[0067] The inner cavity of the second flow guide sleeve 122 axially penetrates the second intercepting body 12 . One end of the second flow guide sleeve 122 forms a second flow hole 121 , and the other end of the second flow guide sleeve 122 is located in the first flow guide sleeve 112 .

[0068] There is a connecting gap between the first guide sleeve 112 and the inner bottom wall of the second intercepting body 12, and there is a connecting gap between the second guide sleeve 122 and the inner top wall of the first intercepting body 11, so that an annular flow channel 2 is formed in the guide chamber.

[0069] Example 2

[0070] The difference between Example 2 and Example 1 is that:

[0071] like Figure 4-Figure 6 As shown, the number of the first flow guide sleeves 112 is set to two, and all the first flow guide sleeves 112 are sequentially sleeved from the inside to the outside in the radial direction, and a first annular clamping cavity 113 is formed between adjacent first flow guide sleeves 112 .

[0072] There are two second flow guide sleeves 122 , and all second flow guide sleeves 122 are radially sleeved from inside to outside in sequence. A second annular cavity 124 is formed between adjacent second flow guide sleeves 122 , and only the innermost second flow guide sleeve 122 axially penetrates the second intercepting body 12 .

[0073] The first flow guide sleeve 112 is inserted into the second annular clamping cavity 124 , and the second flow guide sleeve 122 is inserted into the first annular clamping cavity 113 , thereby forming the annular flow channel 2 which is sequentially sleeved.

[0074] Compared with Example 1, Example 2 has a longer annular flow channel 2.

[0075] According to the different numbers of the first guide sleeves 112 and the second guide sleeves 122 , the end-flow firestop interceptor has various specifications.

[0076] The heat-blocking and filtering effects of the end-flow fire interceptor are both based on its cooling effect. To prove its cooling effect, a temperature test is performed on it.

[0077] like Figure 8 As shown, Figure 8 This is the temperature curve diagram of Example 1, Figure 8 The horizontal coordinate shown is the position coordinate, and the vertical coordinate is the temperature coordinate of the furnace wall of the metal smelting furnace. The horizontal coordinate axis is along the axial direction of the metal smelting furnace. The origin of the coordinate axis is located at a position 300 mm extending from the outlet of the end-flow fire blocker to the high-temperature zone. The direction toward the outlet of the end-flow fire blocker is the positive direction of the coordinate axis, and the opposite direction is the negative direction of the coordinate axis. Therefore, the position coordinate of the outlet of the end-flow fire blocker is +300 mm. Figure 8 It can be seen from the temperature curve that the end-flow fire interceptor has a cooling effect.

[0078] like Figure 9 As shown, Figure 9 This is the temperature curve diagram of Example 2, Figure 9 The horizontal and vertical coordinates Figure 8 The horizontal and vertical coordinates are the same, except that the lowest temperature on the vertical axis is 550℃. Figure 9 It can be seen from the temperature curve that the end-flow fire interceptor has a cooling effect.

[0079] like Figure 10 As shown, Figure 10 It is a temperature curve diagram with and without the end-flow fire stopper under the condition of a furnace temperature of 1200°C.

[0080] like Figure 11 As shown, Figure 11 This is a temperature curve diagram with and without the end-flow fire stopper under the condition of a furnace temperature of 1260°C.

[0081] Combine Figure 10 and Figure 11 When there is no end-flow fire stop interceptor, the maximum temperature at the magnesium vapor outlet can reach 736°C (furnace 1200°C) to 765°C (furnace 1260°C). When there is the end-flow fire stop interceptor, the maximum temperature at the magnesium vapor outlet is 600°C (furnace 1200°C) to 620°C (furnace 1260°C). Therefore, after using the end-flow fire stop interceptor, the temperature at the magnesium vapor outlet is greatly reduced, the temperature reduction range exceeds 100°C, and the cooling effect is significant.

[0082] In order to verify that the end-flow fire stop interceptor can filter out impurities by cooling, the impurity content of a metal smelting furnace is tested with and without the end-flow fire stop interceptor.

[0083] like Figure 12 As shown in the figure, under the heating condition of 1200°C, the end-flow fire stop interceptor can significantly reduce the content of four impurity elements, namely aluminum, manganese, silicon and calcium. The content of silicon and manganese can be reduced to below 20ppm, the content of aluminum is about 60ppm, and the content of calcium is about 200ppm. However, compared with the calcium content when the end-flow fire stop interceptor is not used, the calcium content is significantly reduced during the crystalline magnesium refining process.

[0084] like Figure 13 As shown in the figure, under the heating condition of 1260°C, the end-flow fire stop interceptor can significantly reduce the contents of four impurity elements, namely aluminum, manganese, silicon and calcium. The contents of silicon and manganese can be reduced to below 20ppm, the content of aluminum is about 60ppm, and the content of calcium is about 300ppm. However, compared with the calcium content when the end-flow fire stop interceptor is not used, the calcium content is significantly reduced during the crystalline magnesium refining process.

[0085] Therefore, the end-flow fire-blocking interceptor has a significant impurity filtering effect and can effectively ensure the quality of magnesium smelting.

[0086] Will Figure 13 and Figure 12 In contrast, compared with the heating condition of 1200°C, under the heating condition of 1260°C, when there is no end-flow fire blocker, the calcium content in the crystalline magnesium is relatively stable, while the aluminum, manganese and silicon contents increase by 34.59%, 77.11% and 87.56% respectively. When there is the end-flow fire blocker, the temperature increase has almost no effect on the aluminum, manganese and silicon contents, but the calcium content increases by 100ppm; combined with Figure 14 , Figure 14It can be further seen that the increase in temperature has little effect on the contents of aluminum, manganese, silicon and iron in the crystallized magnesium. However, the increase from 1200°C to 1260°C significantly increases the content of calcium and reduces the content of zinc. The reason is that the increase in the temperature of magnesium vapor makes it more difficult for the calcium fluoride impurities in it to condense in the end-flow fireblocker and thus enter the crystallizer.

[0087] Therefore, during the actual use of the end-flow fire interceptor, the heating temperature can be controlled to meet the filtering requirements of the corresponding impurities.

[0088] In summary, the present invention can effectively reduce the temperature. Compared with the existing fire baffle, it can not only block the heat radiation, but also has a significant filtering effect, effectively improving the quality of magnesium smelting.

[0089] Example 3

[0090] refer to Figure 7 As shown, the present invention provides a method for manufacturing an end-flow fire interceptor, which comprises at least the following steps:

[0091] Step I: obtaining the first intercepting body 11 with the first guide sleeve 112 disposed therein by casting;

[0092] The second intercepting body 12 with the second guide sleeve 122 provided therein is obtained by casting;

[0093] Step II: Fit the open end of the first intercepting body 11 to the open end of the second intercepting body 12 so that the first annular edge groove 114 and the second annular edge groove 125 form a welding groove;

[0094] Step III: Welding is performed along the welding groove to butt the first interception body 11 and the second interception body 12 together, and the end-flow fire-blocking interceptor is manufactured.

[0095] The manufacturing method has simple process and low cost, can realize the mass production of the end-flow type fire interceptor, and is convenient for market promotion.

[0096] Example 4

[0097] The difference between Example 4 and Example 3 is that:

[0098] like Figure 7 As shown, in step II, during the process of fitting the opening end of the first intercepting body 11 and the opening end of the second intercepting body 12 , the corresponding first guide sleeve 112 is inserted into the corresponding second annular clamp cavity 124 , and the corresponding second guide sleeve 122 is inserted into the corresponding first annular clamp cavity 113 .

[0099] In the description of this application, it should be understood that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0100] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" or "several" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0101] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0102] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An end-flow fire interceptor, characterized in that: Includes the interceptor body, which: The interceptor body is provided with annular flow channels in sequence from the inside to the outside along the radial direction, and adjacent annular flow channels are connected in sequence; The interceptor body is relatively provided with an inlet side and an outlet side, the inlet side is circumferentially provided with a first flow hole, and the first flow hole is connected to the outermost annular flow channel; The outlet side is provided with a second flow hole, and the second flow hole is connected to the innermost annular flow channel; The interceptor body includes a first interception body and a second interception body, wherein the first interception body and the second interception body are separately provided, wherein: the first interception body is provided as a barrel structure with one end open; the second interception body is provided as a barrel structure with one end open; the open end of the first interception body is connected to the open end of the second interception body to enclose a flow diversion chamber, and the annular flow channel is provided in the flow diversion chamber; A first guide sleeve is provided inside the first intercepting body, and a second guide sleeve is provided inside the second intercepting body. The number of the first guide sleeves is set to be multiple, and all the first guide sleeves are sequentially sleeved from the inside to the outside in the radial direction, and a first annular clamping cavity is formed between adjacent first guide sleeves; the number of the second guide sleeves is set to be multiple, and all the second guide sleeves are sequentially sleeved from the inside to the outside in the radial direction, and a second annular clamping cavity is formed between adjacent second guide sleeves, and the inner cavity of the innermost second guide sleeve axially penetrates the second intercepting body; the first guide sleeve is inserted into the second annular clamping cavity, and the second guide sleeve is inserted into the first annular clamping cavity to form the annular flow channels that are sequentially sleeved.

2. The end flow fire interceptor according to claim 1, characterized in that: A first annular edge groove is provided along the edge of the opening end of the first intercepting body, and a second annular edge groove is provided along the edge of the opening end of the second intercepting body. The first annular edge groove and the second annular edge groove form a welding groove.

3. The end flow fire interceptor according to claim 2, characterized in that: The cross-sectional shape of the welding groove is set to be V-shaped.

4. The end flow fire interceptor according to claim 2, characterized in that: The inner cavity of the second flow guide sleeve axially passes through the second intercepting body, one end port of the second flow guide sleeve forms the second flow hole, and the other end port of the second flow guide sleeve is located in the first flow guide sleeve.

5. The end flow fire interceptor according to claim 2, characterized in that: The first flow holes are uniformly arranged in the circumference on a side of the first intercepting body away from the second intercepting body; The second flow hole is provided on a side of the second intercepting body away from the first intercepting body.

6. The end flow fire interceptor according to claim 2, characterized in that: The second intercepting body extends outwardly away from a side edge of the first intercepting body to form an annular flange.

7. The end flow fire interceptor according to claim 2, characterized in that: The first flow hole is configured as an oblong hole; The second flow hole is provided with a chamfer.

8. A method for manufacturing an end-flow fire interceptor according to any one of claims 2 to 7, characterized in that: At least the following steps are included: Step I: obtaining a first intercepting body with a first guide sleeve disposed therein by casting; A second intercepting body with a second guide sleeve provided therein is obtained by casting; Step II: fitting the open end of the first intercepting body to the open end of the second intercepting body, so that the first annular edge groove and the second annular edge groove form a welding groove; Step III: Welding along the welding groove to connect the first interception body and the second interception body, and the end-flow fire stop interceptor is manufactured.

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