Header end protection structure

Abstract

The utility model relates to the technical field of reformer, and discloses a collecting tube end protection structure which comprises a collecting tube barrel. The sealing head is arranged at the end part of the collecting pipe barrel, an exhaust port is formed in the sealing head, an end cover for blocking the exhaust port is detachably connected outside the exhaust port, an exhaust pipe communicated with the exhaust port is arranged on the sealing head, and the exhaust pipe extends towards the inside of the collecting pipe barrel; the protection structure comprises a first pouring structure and a second pouring structure, the first pouring structure covers the surface of the end socket and is located on the side, facing the interior of the collecting pipe barrel, of the end socket, and the second pouring structure is movably arranged in the exhaust pipe and suitable for preventing airflow from entering the exhaust pipe. The utility model solves the problem that solid particles entrained by process airflow in the collecting pipe cause abrasion or damage of the end socket of the collecting pipe and easily cause leakage accidents.

Description

Technical Field

[0001] The utility model relates to the technical field of converters, in particular to a protective structure for the end of a collecting pipe. Background Art

[0002] The reformer is a chemical equipment that converts hydrocarbons into synthesis gas in the presence of a catalyst. The manifold is one of the core components of the reformer, which plays the role of collecting and distributing fluids and balancing flow. The end of the manifold in the prior art generally has a head, and the head is provided with an exhaust port.

[0003] In actual use, the process airflow of the heat recovery system in the convection section of the converter will rotate inside the manifold. The solid particles carried by the rotating process airflow will collide with the head of the manifold under the drive of the airflow, causing erosion. Long-term use can easily cause wear or damage to the head, which can easily cause leakage accidents. Utility Model Content

[0004] In view of this, the utility model provides a protective structure for the end of a manifold to solve the problem that solid particles entrained by the process gas flow in the manifold cause the manifold head to be worn or damaged, which easily causes leakage accidents.

[0005] The utility model provides a protective structure for the end of a collecting pipe, comprising: a collecting pipe cylinder; a head, which is arranged at the end of the collecting pipe cylinder, the head is provided with an exhaust port, the exhaust port is detachably connected to the outside of the exhaust port with an end cover for sealing the exhaust port, the head is provided with an exhaust pipe connected to the exhaust port, and the exhaust pipe extends to the inside of the collecting pipe cylinder; a protective structure, comprising a first casting structure and a second casting structure, the first casting structure covers the surface of the head and is located on the side of the head facing the inside of the collecting pipe cylinder, and the second casting structure is movably arranged inside the exhaust pipe and is suitable for blocking airflow from entering the exhaust pipe.

[0006] Beneficial effect: The first casting structure is set on the side of the head facing the inside of the manifold cylinder to isolate the head body from the process airflow. In the actual operation of the converter, when the process airflow and the solid particles carried in the process airflow reach the head, the solid particles cannot collide with the head, thereby not causing wear and damage to the head structure, avoiding leakage accidents. At the same time, the setting of the exhaust pipe retains the exhaust function for the manifold. The second casting structure located in the exhaust pipe can prevent the process airflow from rotating when it reaches the exhaust pipe position, and continuously flush the connection between the exhaust pipe and the exhaust port. When the exhaust port needs to be exhausted, the second casting structure is taken out from the exhaust pipe to achieve the exhaust function.

[0007] In an optional embodiment, a liner is fixedly provided on the end cover, the liner is suitable for extending into the exhaust pipe and fitting with the exhaust pipe, and the second casting structure is filled inside the liner.

[0008] Beneficial effect: By setting the liner, the second casting structure is actually cast and formed in the liner, and combined with the end cover into an integrated structure. When exhaust is required, the end cover is removed together with the second casting structure, so that the second casting structure and the liner are pulled out of the exhaust pipe together, thereby improving operational convenience.

[0009] In an optional embodiment, a connecting pipe is provided on a side of the head away from the collecting pipe cylinder, the connecting pipe is connected to the exhaust port, the end of the connecting pipe has a flange, and the end cover is a flange cover and is connected to the flange by fasteners.

[0010] Beneficial effect: The detachable connection between the end cover and the head is realized through the cooperation between the flange and the flange cover, and the connection is firm and reliable.

[0011] In an optional embodiment, a support is provided on the circumferential inner wall of the collecting tube cylinder near one end of the head, the support is arranged around the axis of the collecting tube cylinder, and the support is inclined toward the side wall of the axis of the collecting tube cylinder and forms a conical channel inside the collecting tube cylinder, and the diameter of the conical channel gradually decreases towards the head.

[0012] Beneficial effect: By setting a support platform surrounding the axis of the manifold barrel, support and limitation are provided for the first casting structure. The support platform can support the first casting structure from the side of the head close to the manifold barrel to prevent the first casting structure from detaching from the head due to its own weight and other reasons. At the same time, the support platform forms a conical channel in the manifold barrel, so that the inside of the manifold gradually transitions from the tube wall to the first casting structure, which can smoothly guide the process airflow in the manifold barrel to the first casting structure with a protective function, thereby avoiding the situation where the process airflow is disturbed due to structural mutations and the impact on other positions of the manifold barrel.

[0013] In an optional embodiment, the support platform includes a support plate and a third casting structure, the support plate is arranged on the inner wall of the manifold barrel and is inclined to form the conical channel, and the third casting structure is filled between the support plate and the inner wall of the manifold barrel.

[0014] Beneficial effect: The support platform is composed of a support plate and a third casting structure. The support plate is tiltedly arranged in the manifold cylinder, and a cavity for accommodating the third casting structure is formed between the manifold cylinder and the support plate, and the third casting structure is directly formed in the cavity. In the process of the support plate guiding the process airflow, the process airflow and the solid particles it carries will inevitably impact the support plate, which is easy to cause wear of the support plate after long-term use. The third casting structure is arranged in the cavity. After the support plate is worn, the third casting structure can protect the side wall of the manifold cylinder and guide the process airflow, so that the service life of the overall structure is longer, and the cost is lower than that of the structure made of a solid metal block to make the support platform.

[0015] In an optional embodiment, the third casting structure has a first annular limiting portion coaxially arranged with the collecting pipe barrel at the end face facing the first casting structure, and the first casting structure has a second annular limiting portion suitable for engaging with the first annular limiting portion at the end face facing the third casting structure.

[0016] Beneficial effect: By setting the first limiting portion and the second limiting portion, it is convenient to align the third casting structure with the first casting structure when assembling the head and the collecting pipe barrel, and make the first casting structure and the third casting structure fit more closely at the junction, reducing the possibility of process airflow entering the gap between the two. At the same time, the cooperation between the first limiting portion and the second limiting portion has a guiding function for the assembly of the head and the collecting pipe barrel, so that the head and the collecting pipe barrel can only be assembled and connected after the position is aligned.

[0017] In an optional embodiment, ceramic fiber paper is provided between the first casting structure and the third casting structure.

[0018] Beneficial effect: By arranging ceramic fiber paper between the first casting structure and the third casting structure, when the head is assembled with the manifold body, the first casting structure and the third casting structure jointly extrude the ceramic fiber paper, and the ceramic fiber paper deforms and fills the gap between the two, thereby further reducing the situation where the process airflow in the manifold enters the gap between the first casting structure and the third casting structure, improving the tightness of the structural bonding, and thus improving reliability.

[0019] In an optional embodiment, a liner ring is provided at the connection seam between the head and the collecting pipe barrel, and the liner ring is fixedly connected to the head. When the collecting pipe barrel and the head are connected, the liner ring is located on the inner side of the collecting pipe barrel and the head, and there is a gap between the liner ring and the inner wall of the collecting pipe barrel and the head.

[0020] Beneficial effect: By arranging a liner ring on the inner side of the connection between the head and the manifold barrel, the liner ring is welded to the head, and a certain gap is left between the manifold barrel and the inner wall of the head, so that when the manifold barrel and the head are assembled, the liner ring can play a guiding and positioning role, and the staff can clearly see the position of the liner ring from the outside, and adjust the relative position of the head and the manifold barrel to facilitate alignment; in addition, after the head and the manifold barrel are connected, if they are connected by welding, the liner ring can shield and block the internal structure during the welding process to prevent the high temperature of welding from causing damage and destruction to the internal first casting structure, the third casting structure, ceramic fiber paper and other structures.

[0021] In an optional embodiment, a side of the head facing the manifold cylinder has a plurality of anchoring nails, and the plurality of anchoring nails are all located inside the first casting structure.

[0022] Beneficial effect: By arranging anchor nails on the inner side of the head, the firmness of the connection between the head and the first casting structure is improved, and the possibility of the first casting structure falling off from the head causing the protection structure to fail is further reduced, thereby improving the stability of the structure.

[0023] In an optional embodiment, the first casting structure and the second casting structure are both made of low-silicon corundum castable material.

[0024] Beneficial effect: By using low-silicon corundum castable as the material of the first casting structure and the second casting structure, the first casting structure and the second casting structure have good wear resistance and fire resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the overall cross-sectional structure of a protective structure for the end of a manifold according to an embodiment of the utility model;

[0027] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;

[0028] Figure 3 for Figure 1 A local enlarged schematic diagram of point B in the middle.

[0029] Description of reference numerals:

[0030] 100, collecting pipe body; 200, head; 201, exhaust port; 202, exhaust pipe; 203, connecting pipe; 204, flange; 205, anchor nail; 300, protective structure; 301, first casting structure; 3011, first annular limiting part; 302, second casting structure; 400, end cover; 401, liner; 500, support platform; 501, support plate; 502, third casting structure; 5021, second annular limiting part; 600, ceramic fiber paper; 700, liner ring. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0032] Combine the following Figures 1 to 3 , describing an embodiment of the utility model.

[0033] According to an embodiment of the utility model, a protective structure 300 for the end of a collecting pipe is provided, comprising: a collecting pipe barrel 100; a head 200, which is arranged at the end of the collecting pipe barrel 100, and has an exhaust port 201 on the head 200, and an end cover 400 for blocking the exhaust port 201 is detachably connected to the outside of the exhaust port 201, and an exhaust pipe 202 connected to the exhaust port 201 is provided on the head 200, and the exhaust pipe 202 extends to the inside of the collecting pipe barrel 100; the protective structure 300 includes a first casting structure 301 and a second casting structure 302, the first casting structure 301 covers the surface of the head 200 and is located on the side of the head 200 facing the inside of the collecting pipe barrel 100, and the second casting structure 302 is movably arranged inside the exhaust pipe 202, and is suitable for blocking the airflow from entering the exhaust pipe 202.

[0034] In this embodiment, the first casting structure 301 is provided on the side of the end cap 200 facing the inside of the manifold barrel 100, that is, the inner wall, to isolate the end cap 200 from the process gas flow. In the actual operation of the converter, when the process gas flow and the solid particles carried in the process gas flow reach the end cap 200, the solid particles cannot collide with the end cap 200, thereby not causing wear and damage to the structure of the end cap 200, thereby avoiding leakage accidents. At the same time, the setting of the exhaust pipe 202 retains the exhaust function for the manifold. The second casting structure 302 located in the exhaust pipe 202 can prevent the process gas flow from rotating when it reaches the exhaust pipe 202, and continuously flush the connection between the exhaust pipe 202 and the exhaust port 201. When the exhaust port 201 needs to be exhausted, the second casting structure 302 is taken out from the exhaust pipe 202 to achieve the exhaust function.

[0035] Specifically, in the process of making the first casting structure 301, a cavity is formed by splicing the head 200 and the auxiliary template. After the exhaust pipe 202 is welded on the head 200, the casting material is added until the casting material is flush with the pipe opening of the exhaust pipe 202 facing the inside of the manifold barrel 100. After the casting material is initially solidified, the auxiliary template is removed to form a casting structure covering the inner surface of the head 200. This embodiment does not limit the type of casting material of the first casting structure 301. The casting material can be a low-silicon corundum casting material or other high-strength casting materials with wear resistance and fire resistance.

[0036] In one embodiment, a liner 401 is fixedly disposed on the end cover 400 . The liner 401 is adapted to extend into the exhaust pipe 202 and fit with the exhaust pipe 202 . The second casting structure 302 is filled inside the liner 401 .

[0037] Specifically, the liner 401 and the exhaust pipe 202 are clearance-fitted or transition-fitted, so that there is a small gap or close contact between the liner 401 and the exhaust pipe 202, and the liner 401 and the exhaust pipe 202 can move axially relative to each other, thereby facilitating the insertion of the second casting structure 302 and the liner 401 into the exhaust pipe 202, or taking them out of the exhaust pipe 202.

[0038] In this embodiment, by providing a liner 401, the second casting structure 302 is actually cast and formed in the liner 401, and is combined with the end cover 400 to form an integrated structure. When exhaust is required, the end cover 400 is removed together with the second casting structure 302, so that the second casting structure 302 and the liner 401 are pulled out of the exhaust pipe 202 together, thereby improving the operational convenience.

[0039] In one embodiment, a connecting pipe 203 is provided on one side of the end cap 200 away from the manifold barrel 100 . The connecting pipe 203 is connected to the exhaust port 201 . The end of the connecting pipe 203 has a flange 204 . The end cover 400 is detachably connected to the flange 204 .

[0040] In this embodiment, the detachable connection between the end cover 400 and the head 200 is achieved through the cooperation between the flange 204 and the flange cover, and the connection is firm and reliable, thereby improving the stability and reliability of the structure.

[0041] In one embodiment, a support platform 500 is provided on the circumferential inner wall of the manifold barrel 100 near one end of the head 200, and the support platform 500 is arranged around the axis of the manifold barrel 100, and the support platform 500 is inclined toward the side wall of the axis of the manifold barrel 100 and forms a conical channel inside the manifold barrel 100, and the diameter of the conical channel gradually decreases towards the head 200.

[0042] It should be noted that the present embodiment does not limit the specific structure of the support 500. The support 500 may be a solid structure formed by filling a castable in a hollow structure. In some embodiments not shown, the support 500 may be a solid structure made entirely of the same metal as the manifold barrel 100, or may be a hollow structure.

[0043] In this embodiment, a support platform 500 is provided around the axis of the manifold barrel 100 to provide support and limit for the first casting structure 301. The support platform 500 can support the first casting structure 301 from the side of the head 200 close to the manifold barrel 100 to prevent the first casting structure 301 from separating from the head 200 due to its own weight and other reasons. At the same time, the support platform 500 forms a conical channel in the manifold barrel 100, so that the inside of the manifold gradually transitions from the tube wall to the first casting structure 301, which can smoothly guide the process gas flow in the manifold barrel 100 to the first casting structure 301 with a protective function, thereby avoiding the situation where the process gas flow direction is disturbed due to structural mutations and the impact on other positions of the manifold barrel 100.

[0044] In one embodiment, the support platform 500 includes a support plate 501 and a third casting structure 502 . The support plate 501 is disposed on the inner wall of the manifold barrel 100 and is tilted to form a tapered channel. The third casting structure 502 is filled between the support plate 501 and the inner wall of the manifold barrel 100 .

[0045] Specifically, the present embodiment does not limit the specific arrangement of the support plate 501 and the inner wall of the manifold barrel 100. The support plate 501 may be integrally forged with the inner wall of the manifold barrel 100. In some embodiments not shown, the support plate 501 may be welded to the inner wall of the manifold barrel 100, or may be installed on the inner wall of the manifold barrel 100 by means of fasteners, connectors and other components.

[0046] In this embodiment, the support platform 500 is composed of a support plate 501 and a third casting structure 502. The support plate 501 is tiltedly arranged in the manifold barrel 100, and a cavity for accommodating the third casting structure 502 is formed between the manifold barrel 100 and the support plate 501. The third casting structure 502 is directly formed in the cavity. In the process of the support plate 501 guiding the process airflow, the process airflow and the solid particles it carries will inevitably impact the support plate 501, which is easy to cause wear of the support plate 501 after long-term use. The third casting structure 502 is arranged in the cavity. After the support plate 501 is worn, the third casting structure 502 can play a role in protecting the side wall of the manifold barrel 100 and guiding the process airflow, so that the service life of the overall structure is longer, and the cost is lower than that of the structure of the support platform 500 made of a solid metal block.

[0047] In one embodiment, the third casting structure 502 has a first annular limiting portion 3011 coaxially arranged with the collecting pipe barrel 100 at the end face facing the first casting structure 301, and the first casting structure 301 has a second annular limiting portion 5021 suitable for being embedded with the first annular limiting portion 3011 at the end face facing the third casting structure 502.

[0048] In this embodiment, by providing the first limiting portion and the second limiting portion, it is convenient to align the third casting structure 502 with the first casting structure 301 when assembling the head 200 and the collecting pipe barrel 100, and make the first casting structure 301 and the third casting structure 502 fit more closely at the junction, thereby reducing the possibility of process gas flow entering the gap between the two. At the same time, the cooperation between the first limiting portion and the second limiting portion has a guiding function for the assembly of the head 200 and the collecting pipe barrel 100, so that the head 200 and the collecting pipe barrel 100 can only be assembled and connected after the position is aligned.

[0049] In one embodiment, ceramic fiber paper 600 is disposed between the first casting structure 301 and the third casting structure 502 .

[0050] In this embodiment, ceramic fiber paper 600 is arranged between the first casting structure 301 and the third casting structure 502, so that when the head 200 is assembled with the collecting tube cylinder 100, the first casting structure 301 and the third casting structure 502 jointly extrude the ceramic fiber paper 600, and the ceramic fiber paper 600 is deformed and fills the gap between the two, thereby further reducing the process airflow in the collecting tube from entering the gap between the first casting structure 301 and the third casting structure 502, improving the tightness of the structural bonding, and thus improving the reliability.

[0051] In one embodiment, a liner ring 700 is provided at the connection seam between the head 200 and the manifold barrel 100, and the liner ring 700 is fixedly connected to the head 200. When the manifold barrel 100 and the head 200 are connected, the liner ring 700 is located on the inner side of the manifold barrel 100 and the head 200, and there is a gap between the liner ring 700 and the inner walls of the manifold barrel 100 and the head 200.

[0052] Specifically, the liner ring 700 can be connected to the inner wall of the head 200 by welding. In some embodiments not shown, the liner ring 700 can also be connected to the inner wall of the head 200 or the inner wall of the manifold barrel 100 by connecting parts or fasteners.

[0053] In this embodiment, a liner ring 700 is provided on the inner side of the connection between the head 200 and the manifold barrel 100, and the liner ring 700 is welded to the head 200, and a certain gap is left between the inner walls of the manifold barrel 100 and the head 200, so that when the manifold barrel 100 and the head 200 are assembled, the liner ring 700 can play a guiding and positioning role, and the staff can clearly see the position of the liner ring 700 from the outside, and adjust the relative position of the head 200 and the manifold barrel 100 to facilitate alignment; in addition, after the head 200 and the manifold barrel 100 are connected, if the head 200 and the manifold barrel 100 are welded together, the liner ring 700 can shield and block the internal structure to prevent the high temperature of welding from causing damage and destruction to the internal first casting structure 301, the third casting structure 502 and the ceramic fiber paper 600 and other structures.

[0054] In one embodiment, a side of the end cap 200 facing the manifold body 100 has a plurality of anchoring nails 205 , and the plurality of anchoring nails 205 are all located inside the first casting structure 301 .

[0055] Specifically, the anchoring nail 205 is disposed in the head 200 by welding, and is fixed inside the first casting structure 301 after the first casting structure 301 is cast and initially set.

[0056] In this embodiment, by setting anchor nails 205 on the inner side of the head 200, the strength of the connection between the head 200 and the first casting structure 301 is improved, and the possibility of the first casting structure 301 falling off from the head 200 and causing the protective structure 300 to fail is further reduced, thereby improving the stability of the structure.

[0057] In one embodiment, the first casting structure 301 and the second casting structure 302 are both made of low-silicon corundum castable material.

[0058] In this embodiment, low-silicon corundum castable material is used as the material of the first casting structure 301 and the second casting structure 302, so that the first casting structure 301 and the second casting structure 302 have good wear resistance and fire resistance.

[0059] In some of the above embodiments, specifically, when setting the protective structure 300 of the manifold, first, the liner ring 700 is welded on the inner side of the edge of the head 200, the exhaust pipe 202 is welded at the exhaust port 201 in the head 200, the anchor nail 205 is welded inside the head 200, and the integrally formed support plate 501 and the manifold barrel 100 are manufactured, and then the first casting structure 301 is cast with the help of an auxiliary formwork, and at the same time, the second casting structure 302 is cast in the liner 401, and the third casting structure 502 is cast into the cavity between the integrally forged manifold barrel 100 and the support plate 501 through an auxiliary formwork, and finally, the head 200 with the first casting structure 301 is spliced ​​and welded to the manifold barrel 100, and then the liner 401 with the second casting structure 302 is inserted into the exhaust pipe 202, and the end cover 400 and the flange 204 are installed, and the installation of the manifold protective structure 300 is completed.

[0060] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A manifold end protection structure, characterized in that: include: A collecting tube cylinder (100); A sealing head (200) is arranged at the end of the manifold barrel (100), the sealing head (200) is provided with an exhaust port (201), an end cover (400) for sealing the exhaust port (201) is detachably connected to the outside of the exhaust port (201), an exhaust pipe (202) is arranged on the sealing head (200) and is connected to the exhaust port (201), and the exhaust pipe (202) extends into the interior of the manifold barrel (100); The protective structure (300) includes a first casting structure (301) and a second casting structure (302), wherein the first casting structure (301) covers the surface of the head (200) and is located on the side of the head (200) facing the interior of the collecting pipe cylinder (100), and the second casting structure (302) is movably arranged inside the exhaust pipe (202) and is suitable for blocking airflow from entering the exhaust pipe (202).

2. The manifold end protection structure according to claim 1, characterized in that: The end cover (400) is fixedly provided with a liner (401), the liner (401) is suitable for extending into the exhaust pipe (202) and matching with the exhaust pipe (202), and the second casting structure (302) is filled inside the liner (401).

3. The manifold end protection structure according to claim 2, characterized in that: A connecting pipe (203) is provided on a side of the sealing head (200) away from the collecting pipe cylinder (100), the connecting pipe (203) is connected to the exhaust port (201), the end of the connecting pipe (203) has a flange (204), and the end cover (400) is a flange cover and is connected to the flange (204) by fasteners.

4. The manifold end protection structure according to claim 1, characterized in that: A support platform (500) is provided on the circumferential inner wall of the manifold barrel (100) near one end of the head (200), and the support platform (500) is arranged around the axis of the manifold barrel (100). The support platform (500) is inclined toward the side wall of the axis of the manifold barrel (100) and forms a conical channel inside the manifold barrel (100), and the diameter of the conical channel gradually decreases towards the head (200).

5. The manifold end protection structure according to claim 4, characterized in that: The support platform (500) includes a support plate (501) and a third casting structure (502). The support plate (501) is arranged on the inner wall of the manifold barrel (100) and is inclined to form the conical channel. The third casting structure (502) is filled between the support plate (501) and the inner wall of the manifold barrel (100).

6. The manifold end protection structure according to claim 5, characterized in that: The third casting structure (502) has a first annular limiting portion (3011) coaxially arranged with the collecting pipe barrel (100) at the end surface facing the first casting structure (301), and the first casting structure (301) has a second annular limiting portion (5021) suitable for being engaged with the first annular limiting portion (3011) at the end surface facing the third casting structure (502).

7. The manifold end protection structure according to claim 6, characterized in that: Ceramic fiber paper (600) is provided between the first casting structure (301) and the third casting structure (502).

8. The manifold end protection structure according to claim 1, characterized in that: A liner ring (700) is provided at the connection seam between the head (200) and the manifold barrel (100), and the liner ring (700) is fixedly connected to the head (200). When the manifold barrel (100) and the head (200) are connected, the liner ring (700) is located on the inner side of the manifold barrel (100) and the head (200), and there is a gap between the liner ring (700) and the inner walls of the manifold barrel (100) and the head (200).

9. The manifold end protection structure according to claim 1, characterized in that: The end cap (200) has a plurality of anchoring nails (205) on one side facing the manifold cylinder (100), and the plurality of anchoring nails (205) are all located inside the first casting structure (301).

10. The manifold end protection structure according to any one of claims 1 to 9, characterized in that: The first casting structure (301) and the second casting structure (302) are both made of low-silicon corundum castable material.

Images