Blast furnace main channel pouring device

Abstract

The application belongs to the technical field of pouring and specifically relates to a blast furnace main groove pouring device. The blast furnace main groove pouring device comprises a front mould, a middle mould which is detachably connected with the end of the front mould, and a rear mould which is connected with the end of the middle mould away from the front mould. The width of the middle mould is consistent with the width of the rear mould, and the width of the front mould is smaller than the width of the middle mould. The blast furnace main groove pouring device can guarantee the service life of the blast furnace tapping main groove.

Description

Technical Field

[0001] This application belongs to the field of casting technology, specifically relating to a casting device for the main trench of a blast furnace. Background Technology

[0002] The blast furnace tapping main channel is the core passage for molten iron to flow from the taphole to the ladle. Its refractory lining is subjected to severe scouring and chemical corrosion from high-temperature, high-velocity slag and iron over long periods. The main channel casting jig is a key tool for the reconstruction of the refractory lining of the blast furnace tapping main channel. Its structural design directly determines the thickness distribution, outline shape, and forming quality of the working layer of the blast furnace tapping main channel, thus affecting the overall service life, maintenance cost, and safety and convenience of tapping operations.

[0003] In related technologies, the width of the casting jig for the main trench is uniformly sized along the length of the casting jig. This results in insufficient working layer thickness in the area where the slag and iron circulation is most intense in the main trench swirling zone, while the working layer thickness is relatively excessive in the later section where the circulation is weaker, thus affecting the service life. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a blast furnace main trench casting device, which aims to at least partially solve the technical problem that, due to the uniform size of the width of the casting jig along the length of the main trench casting jig, the working layer thickness in the area where the slag-iron circulation is most intense in the main trench swirling zone is insufficient, while the working layer thickness in the later section where the circulation is weaker is relatively excessive, thus affecting the service life.

[0005] The technical solution of this invention is as follows: A blast furnace main trench casting device includes: a front jig; a middle jig detachably connected to the end of the front jig; and a rear jig connected to the end of the middle jig away from the front jig; wherein the width of the middle jig is the same as the width of the rear jig, and the width of the front jig is smaller than the width of the middle jig.

[0006] In some embodiments, the front fixture includes: a body detachably connected to the middle fixture; and a front platform connected to the end of the body away from the middle fixture; wherein the width of the front platform remains consistent along the length of the front fixture.

[0007] In some embodiments, the front-end platform includes: a first bevel connected to the end of the body away from the central fixture; and a second bevel connected to the end of the first bevel away from the body; wherein the thickness of the second bevel remains consistent along the length of the front fixture.

[0008] In some embodiments, the body has a first side and a second side arranged opposite to each other, the first slope has a third side and a fourth side arranged opposite to each other, and the second slope has a fifth side and a sixth side arranged opposite to each other; wherein, the third side connects the first side and the fifth side, the third side, the first side and the fifth side are flush, the fourth side connects the second side and the sixth side, and the fourth side is a straight inclined surface.

[0009] In some implementations, the fourth side has a uniform transition with a single slope along the direction from the second slope towards the body.

[0010] In some embodiments, along the width direction of the front part of the fixture, the cross-sectional shape of the first bevel is a right trapezoid, and the cross-sectional shape of the second bevel is a square.

[0011] In some embodiments, the blast furnace main trench casting device further includes a plurality of first movable bearing components, a plurality of second movable bearing components, and a plurality of third movable bearing components; along the length direction of the front jig, the plurality of first movable bearing components are arranged side by side at intervals, and the front jig is detachably disposed within the plurality of first movable bearing components; along the length direction of the middle jig, the plurality of second movable bearing components are arranged side by side at intervals, and the middle jig is detachably disposed within the plurality of second movable bearing components; along the length direction of the rear jig, the plurality of third movable bearing components are arranged side by side at intervals, and the rear jig is detachably disposed within the plurality of third movable bearing components.

[0012] In some embodiments, the first, second, and third mobile load-bearing components each include: a load-bearing frame with a groove; and a plurality of casters connected to the load-bearing frame; wherein the front jig is disposed in the groove of the first mobile load-bearing component, the middle jig is disposed in the groove of the second mobile load-bearing component, and the rear jig is disposed in the groove of the third mobile load-bearing component.

[0013] In some embodiments, the width of the front jig is the same as the width of the groove of the first movable bearing component, the width of the middle jig is the same as the width of the groove of the second movable bearing component, and the width of the rear jig is the same as the width of the groove of the third movable bearing component.

[0014] In some implementations, the front fixture, the middle fixture, and the rear fixture are each provided with multiple lifting lugs.

[0015] The beneficial effects of the present invention include at least the following: Because the middle jig is detachably connected to the end of the front jig, and the rear jig is connected to the end of the middle jig away from the front jig, when the refractory lining of the blast furnace tapping main channel needs to be rebuilt, the front jig, the middle jig and the rear jig are respectively hoisted into the blast furnace tapping main channel, and then the two ends of the middle jig are respectively connected to the front jig and the rear jig, so that the refractory lining of the blast furnace tapping main channel can be rebuilt.

[0016] Since the width of the middle jig is the same as that of the rear jig, and the width of the front jig is smaller than that of the middle jig, the front jig corresponds to the swirling zone. When the refractory lining of the blast furnace main tapping channel is rebuilt, the thickness of the working layer in the swirling zone can be increased accordingly to resist the most intense slag-iron circulation scouring and erosion in the swirling zone, thus improving the service life of the blast furnace main tapping channel. At the same time, the middle and rear jigs correspond to the area where the slag-iron circulation weakens in the latter part of the swirling zone. The area where the slag-iron circulation weakens in the latter part of the swirling zone is a less eroded area. When the refractory lining of the blast furnace main tapping channel is rebuilt, a thinner working layer can be formed in the less eroded area. Under the premise of improving the service life of the blast furnace main tapping channel, the amount of high-value castables used can be significantly reduced, the cost of refractory materials can be reduced, and the working layer thickness and erosion intensity can be matched. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a main schematic diagram of a blast furnace main trench casting device according to some embodiments; Figure 2 for Figure 1 Top view of the casting device for the main trench of a medium blast furnace; Figure 3 for Figure 1 A schematic diagram of the first moving load-bearing component of the blast furnace main trench casting device; Figure 4 for Figure 4 Side view of the support frame of the first mobile support component.

[0019] In the attached image: Front fixture 10, body 11, front platform 12, first ramp 121, second ramp 122; middle fixture 20; rear fixture 30; first movable bearing assembly 40, bearing frame 41, groove 42, caster wheel 43; second movable bearing assembly 50, third movable bearing assembly 60; lifting lug 70; pulley 80. Detailed Implementation

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

[0021] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0024] Specific technical solutions will now be described in detail with reference to the accompanying drawings, which are not necessarily drawn to scale. Similar or identical reference numerals may be used to designate the same or similar parts in different figures. The use of similar or identical reference numerals in different figures does not mean that all figures including similar or identical reference numerals constitute a single or the same embodiment. The accompanying drawings illustrate the various embodiments discussed in this application in a generalized, illustrative, and not restrictive manner.

[0025] Combination Figure 1 and Figure 2The blast furnace main trench casting device according to this application includes: a front jig 10, a middle jig 20, and a rear jig 30. The middle jig 20 is detachably connected to the end of the front jig 10. The rear jig 30 is connected to the end of the middle jig 20 away from the front jig 10. The width of the middle jig 20 is the same as the width of the rear jig 30, and the width of the front jig 10 is smaller than the width of the middle jig 20. For example, the width of the front jig 10 can be 900 mm, and the widths of the middle jig 20 and the rear jig 30 can both be 1100 mm.

[0026] Since the middle jig 20 is detachably connected to the end of the front jig 10, and the rear jig 30 is connected to the end of the middle jig 20 away from the front jig 10, when the refractory lining reconstruction operation of the blast furnace tapping main channel is to be carried out, the front jig 10, the middle jig 20 and the rear jig 30 are respectively hoisted into the blast furnace tapping main channel, and then the two ends of the middle jig 20 are respectively connected to the front jig 10 and the rear jig 30, so that the refractory lining reconstruction operation of the blast furnace tapping main channel can be carried out.

[0027] Since the width of the middle jig 20 is the same as the width of the rear jig 30, and the width of the front jig 10 is smaller than the width of the middle jig 20, the front jig 10 corresponds to the swirling zone. When the refractory lining of the blast furnace tapping main channel is rebuilt, the thickness of the working layer in the swirling zone can be increased accordingly to resist the most intense slag-iron circulation scouring and erosion in the swirling zone, thereby improving the service life of the blast furnace tapping main channel. At the same time, the middle jig 20 and the rear jig 30 correspond to the slag-iron circulation weakening area in the rear section of the swirling zone. The slag-iron circulation weakening area in the rear section of the swirling zone is a less eroded area. When the refractory lining of the blast furnace tapping main channel is rebuilt, a thinner working layer can be formed in the less eroded area. Under the premise of improving the service life of the blast furnace tapping main channel, the amount of high-value castables used can be significantly reduced, the cost of refractory materials can be reduced, and the working layer thickness and erosion intensity can be matched.

[0028] In related technologies, the front end of the jig adopts a variable cross-section wedge structure with a "thin front end and thick rear end" (the front end thickness is 280mm, gradually increasing to 550mm) and is combined with a double-angle inclined surface design. This structure has a series of inherent defects, such as large welding deformation, easy formation of steps and local pits after casting, disordered molten iron flow, and easy accumulation of slag and iron, which affect the service life of the main trench and operational safety.

[0029] Combination Figure 1 and Figure 2In some embodiments, the front fixture 10 includes a body 11 and a front platform 12. The body 11 is detachably connected to the middle fixture 20. The front platform 12 is connected to the end of the body 11 away from the middle fixture 20. Along the length of the front jig 10, the width of the front platform 12 remains consistent, ensuring a smooth working layer in the swirling zone formed by casting, free of steps, local protrusions or depressions, and with uniform thickness. Furthermore, the surface of the front platform 12 is flat and free of dead corners, making it easy to peel off slag and iron in whole pieces during cleaning operations without additional repairs, thus improving cleaning efficiency. Simultaneously, the front platform 12 forms a smooth geometric contour, stabilizing the flow of molten iron and ensuring uniform circulation, avoiding eddies and intensified local scouring caused by steps and inflection points. It also reduces the deposition and adhesion of slag and iron on the front platform 12, significantly reducing the amount of slag and iron accumulated below the mud jacket. Furnace workers no longer need to manually pry slag while the taphole is spraying, completely eliminating the safety risk of high-temperature burns, reducing labor intensity, and achieving a highly efficient "splatter-and-plug" taphole-closing operation mode.

[0030] Combination Figure 1 and Figure 2 In some embodiments, the front-end platform 12 includes a first bevel 121 and a second bevel 122. The first bevel 121 is connected to the end of the body 11 away from the central fixture 20. The second bevel 122 is connected to the end of the first bevel 121 away from the body 11. Along the length of the front jig 10, the thickness of the second bevel 122 remains consistent. The uniform thickness and non-variable cross-section design of the second bevel 122 reduces welding deformation and stress concentration, improves manufacturing accuracy, structural rigidity and reusability. It makes the surface of the second bevel 122 flat and without dead corners, making it easy to peel off slag and iron in one piece during cleaning without additional repair, thus improving cleaning efficiency. At the same time, it also makes the second bevel 122 form a smooth geometric contour, making the molten iron flow stable and the circulation uniform, avoiding the eddies and local scouring caused by steps and inflection points. It also reduces the deposition and adhesion of slag and iron on the second bevel 122, which can significantly reduce the amount of slag and iron accumulation under the mud jacket. The furnace workers do not need to manually pry slag when the taphole is spraying, which completely eliminates the safety risk of high temperature burns, reduces labor intensity, and realizes the efficient taphole blocking operation mode of "splattering and blocking". For example, the connecting state 121 is welded to the end of the body 11 away from the middle jig 20, and the second bevel 122 is welded to the end of the first bevel 121 away from the body 11.

[0031] Combination Figure 1 and Figure 2In some embodiments, the body 11 has a first side and a second side arranged opposite to each other, the first slope 121 has a third side and a fourth side arranged opposite to each other, and the second slope 122 has a fifth side and a sixth side arranged opposite to each other. The third side connects to the first and fifth sides, and the third, first, and fifth sides are flush. The fourth side connects to the second and sixth sides and is a straight slope, meaning it has no inflection points or broken lines, making it a single straight slope. This ensures that there are no blind spots during template installation and vibration construction, guaranteeing the density of the cast-in-place material. After molding, the surface is smooth without steps and has uniform thickness. This allows the surface of the first slope 121 to be flat and without blind spots, making it easy to peel off slag and iron in whole pieces during cleaning without additional repairs, thus improving cleaning efficiency. At the same time, it also makes the first slope 121 form a smooth geometric contour, stabilizing the flow of molten iron and ensuring uniform circulation. This avoids eddies and localized scouring caused by steps and inflection points, and reduces the deposition and adhesion of slag and iron on the first slope 121. This significantly reduces the amount of slag and iron accumulated under the mud jacket, eliminating the need for furnace workers to manually pry slag while the taphole is spraying, completely eliminating the safety risk of high-temperature burns, reducing labor intensity, and achieving a highly efficient "splatter-and-plug" plugging operation mode.

[0032] Combination Figure 1 and Figure 2 In some embodiments, the fourth side has a uniform transition with a single slope along the direction from the second slope 122 to the body 11, making the fourth side a single straight inclined plane. This ensures that there are no dead angles in the template installation and vibration construction, guarantees the density of the cast material, and results in a smooth surface without steps and uniform thickness after molding. This also makes the surface of the first slope 121 flat and without dead angles, making it easy to peel off the slag and iron in whole pieces during cleaning without additional repairs, thus improving cleaning efficiency. At the same time, it also makes the first slope 121 form a smooth geometric contour, making the molten iron flow stable and the circulation uniform, avoiding the eddies and local scouring caused by steps and inflection points. It also reduces the deposition and adhesion of slag and iron on the first slope 121, which can significantly reduce the amount of slag and iron accumulation under the mud jacket. The furnace workers do not need to manually pry slag while the taphole is spraying, which completely eliminates the safety risk of high temperature burns, reduces labor intensity, and realizes the efficient plugging operation mode of "splattering and plugging".

[0033] Combination Figure 1 and Figure 2 In some embodiments, along the width direction of the front fixture 10, the cross-sectional shape of the first bevel 121 is a right trapezoid, so that the fourth side is a straight inclined surface, and the cross-sectional shape of the second bevel 122 is square, along the length direction of the front fixture 10, so that the thickness of the second bevel 122 remains consistent.

[0034] Combination Figure 1 , Figure 3 and Figure 4 In some embodiments, to support the front jig 10, the middle jig 20, and the rear jig 30, the blast furnace main trench casting device further includes multiple first movable support components 40, multiple second movable support components 50, and multiple third movable support components 60. Along the length of the front jig 10, the multiple first movable support components 40 are arranged side-by-side at intervals. The front jig 10 is detachably disposed within the multiple first movable support components 40 to provide uniform support to the front jig 10 at multiple points, preventing deformation due to its own weight, protecting the tooling accuracy, and extending its service life. Along the length of the middle jig 20, the multiple second movable support components 50 are arranged side-by-side at intervals. The middle jig 20 is detachably disposed within the multiple second movable support components 50 to provide uniform support to the middle jig 20 at multiple points, preventing deformation due to its own weight, protecting the tooling accuracy, and extending its service life. Along the length of the rear fixture 30, multiple third movable bearing components 60 are arranged side by side at intervals. The rear fixture 30 can be detachably disposed within the multiple third movable bearing components 60 to provide uniform support to the rear fixture 30 at multiple points, thereby preventing deformation of the rear fixture 30 due to its own weight, protecting the tooling accuracy, and extending its service life.

[0035] Combination Figure 3 and Figure 4 In some embodiments, the first mobile support assembly 40, the second mobile support assembly 50, and the third mobile support assembly 60 each include a support frame 41 and multiple casters 43. The support frame 41 has a groove 42. The multiple casters 43 are connected to the support frame 41, and the casters 43 drive the support frame 41 to move, so that the support frame 41 can quickly move the front jig 10, the middle jig 20, and the rear jig 30 to the working position, realizing rapid transfer without multiple hoisting operations and improving work efficiency.

[0036] In some embodiments, the front jig 10 is disposed in the groove 42 of the first movable bearing component 40, the middle jig 20 is disposed in the groove 42 of the second movable bearing component 50, and the rear jig 30 is disposed in the groove 42 of the third movable bearing component 60, thereby achieving uniform force storage of the front jig 10, the middle jig 20, and the rear jig 30.

[0037] In some embodiments, the width of the front jig 10 is consistent with the width of the groove 42 of the first movable support component 40 to achieve a limiting position and ensure the stability of the front jig 10 within the groove 42 of the first movable support component 40; the width of the middle jig 20 is consistent with the width of the groove 42 of the second movable support component 50 to achieve a limiting position and ensure the stability of the middle jig 20 within the groove 42 of the second movable support component 50; and the width of the rear jig 30 is consistent with the width of the groove 42 of the third movable support component 60 to achieve a limiting position and ensure the stability of the rear jig 30 within the groove 42 of the third movable support component 60.

[0038] Combination Figure 1 In some embodiments, the front jig 10, the middle jig 20 and the rear jig 30 are each provided with a plurality of lifting lugs 70 to facilitate hoisting by the overhead crane.

[0039] In some embodiments, the side walls of the front jig 10, the middle jig 20 and the rear jig 30 are provided with multiple sets of pulleys 80 at certain intervals. After the front jig 10, the middle jig 20 and the rear jig 30 are hoisted into the main tapping trench of the blast furnace by a crane, they can be easily and quickly pushed and pulled into place by ordinary engineering machinery such as excavators, completely replacing the reliance on the trench cover machine, simplifying operation, improving efficiency, protecting equipment and reducing labor intensity.

[0040] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0043] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0044] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A blast furnace main trench casting device, characterized in that, include: front tire; The middle part of the fixture is detachably connected to the end of the front part of the fixture; The rear part of the tire is connected to the end of the middle part of the tire away from the front part of the tire; The width of the middle part of the tire is the same as the width of the rear part of the tire, and the width of the front part of the tire is smaller than the width of the middle part of the tire.

2. The blast furnace main trench casting device according to claim 1, characterized in that, The front fixture includes: The main body is detachably connected to the central fixture; The front-end platform is connected to the end of the body away from the central fixture; The width of the front platform remains consistent along the length of the front fixture.

3. The blast furnace main trench casting device according to claim 2, characterized in that, The front-end platform includes: The first bevel is connected to the end of the body that is away from the middle fixture; The second bevel is connected to the end of the first bevel furthest from the body; The thickness of the second bevel remains consistent along the length of the front part of the fixture.

4. The blast furnace main trench casting device according to claim 3, characterized in that, The main body has a first side and a second side arranged opposite to each other, the first slope has a third side and a fourth side arranged opposite to each other, and the second slope has a fifth side and a sixth side arranged opposite to each other. The third side is connected to the first side and the fifth side, and the third side, the first side and the fifth side are flush. The fourth side is connected to the second side and the sixth side, and the fourth side is a straight inclined plane.

5. The blast furnace main trench casting device according to claim 4, characterized in that, Along the direction from the second slope towards the body, the fourth side has a uniform transition with a single slope.

6. The blast furnace main trench casting device according to claim 3, characterized in that, Along the width direction of the front part of the fixture, the cross-sectional shape of the first slope is a right trapezoid, and the cross-sectional shape of the second slope is a square.

7. The blast furnace main trench casting device according to any one of claims 1-6, characterized in that, The blast furnace main trench casting device also includes multiple first mobile bearing components, multiple second mobile bearing components, and multiple third mobile bearing components; Along the length of the front part of the tire, a plurality of first movable bearing components are arranged side by side at intervals, and the front part of the tire is detachably disposed within the plurality of first movable bearing components; Along the length of the central fixture, a plurality of second movable bearing components are arranged side by side at intervals, and the central fixture is detachably disposed within the plurality of second movable bearing components; Along the length of the rear tire, a plurality of third mobile bearing components are arranged side by side at intervals, and the rear tire is detachably disposed within the plurality of third mobile bearing components.

8. The blast furnace main trench casting device according to claim 7, characterized in that, The first mobile carrier component, the second mobile carrier component, and the third mobile carrier component each include: The load-bearing frame has grooves; Multiple casters are connected to the load-bearing frame; The front part of the fixture is located in the groove of the first movable bearing component, the middle part of the fixture is located in the groove of the second movable bearing component, and the rear part of the fixture is located in the groove of the third movable bearing component.

9. The blast furnace main trench casting device according to claim 8, characterized in that, The width of the front fixture is the same as the width of the groove of the first movable bearing component, the width of the middle fixture is the same as the width of the groove of the second movable bearing component, and the width of the rear fixture is the same as the width of the groove of the third movable bearing component.

10. The blast furnace main trench casting device according to any one of claims 1-6, characterized in that, The front fixture, the middle fixture, and the rear fixture are all equipped with multiple lifting lugs.

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