Protection device for exhaust tower top steel beam sliding support and construction method of protection device

Abstract

The protection device comprises a concrete wall, an L-shaped bearing step is arranged at the top end of the concrete wall, a plurality of steel beams arranged side by side are arranged on the L-shaped bearing step, and limiting pieces are arranged on the two sides of the sliding end of each steel beam correspondingly; rock wool protective layers are arranged between the limiting pieces and the steel beam, the limiting pieces are fixed to the concrete wall through first expansion bolts, the limiting pieces are higher than the steel beam, and a Z-shaped protective cover is arranged at the top ends of the two limiting pieces and comprises an outer protective plate, a top protective plate and a connecting and fixing plate. Sliding of the steel beam is not affected even if the rock wool protection layer has certain construction errors or thermal expansion; the rock wool protection layer can also prevent outdoor sundries from entering the sliding support and can also prevent air from being in excessive contact with the surface of the steel beam to cause corrosion; rainwater and sundries can be prevented from entering the sliding support; bolts or anchor bolts are adopted for connection, sliding failure caused by on-site welding is avoided, and construction is more convenient; maintenance and daily maintenance are facilitated, and inspection can be conducted by unscrewing the bolts.

Description

Technical Field

[0001] The invention belongs to the field of exhaust tower equipment, and in particular relates to a protective device for a sliding support of a steel beam at the top of an exhaust tower and a construction method thereof. Background Art

[0002] The exhaust tower is a component of some test plants. Its function is to discharge the high-temperature gas generated by the test to the outside. It is generally a concrete wall structure. A steel beam needs to be set on the top of the exhaust tower to bear the load of the silencer element. In order to reduce the temperature stress, one end of the steel beam is a fixed end and the other end is a sliding end. At the sliding end, the steel beam is placed on the embedded parts on the top of the concrete wall without any fastening measures, forming a sliding support.

[0003] The sliding support requires that the steel beam can only slide along the length of the beam. In order to prevent the steel beam from sliding sideways and debris from entering the sliding support, the current practice is as follows: Figure 1 The top of the concrete wall has an L-shaped load-bearing step, and a steel beam is placed on the step. One end of the steel beam is a fixed end and the other end is a sliding end. A U-shaped protective cover with an opening facing downward is used at the sliding end to limit and protect the sliding support. Steel plates need to be embedded on both the horizontal and vertical sides of the L-shaped load-bearing step. The bottom end of the U-shaped steel plate protective cover is welded to the horizontal side of the L-shaped load-bearing step, and the side of the U-shaped protective cover is welded to the vertical side of the L-shaped load-bearing step.

[0004] After actual engineering application, it was found that there are many disadvantages: 1) In order to prevent the lateral sliding of the steel beam, the gap between the edge of the steel beam and the sides and top of the steel plate protective cover is designed to be relatively small. If there is a slight deviation in the processing and installation of the components, the gap between the edge of the steel beam and the U-shaped steel plate protective cover will be even smaller. In this case, if welding is performed again, after the steel is hot-melted, it is very likely that the steel beam and the U-shaped steel plate protective cover will be welded together, hindering the sliding of the steel beam. This situation cannot be discovered during construction, use and daily maintenance. 2) The U-shaped steel plate protective cover is easily corroded by debris and rainwater. The U-shaped steel plate protective cover is easy to accumulate liquid and corrode due to the closed air and lack of circulation; 3) It cannot be inspected and maintained, and the damage or failure of the sliding bearing cannot be detected in time until a large deformation occurs or the concrete cracks, which affects the safety of the structure. The safety risk is high and the repair cost is high. Summary of the invention

[0005] The invention provides a protection device for a sliding support of a steel beam on a top of an exhaust tower and a construction method thereof, so as to solve the technical problems mentioned in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a protective device for the sliding support of the steel beam at the top of the exhaust tower, comprising a concrete wall, the top of the concrete wall having an L-shaped load-bearing step, a plurality of side-by-side steel beams being arranged on the L-shaped load-bearing step, one end of the steel beam being a fixed end, and the other end being a sliding end, the L-shaped load-bearing step being provided with embedded steel plates at both the fixed end and the sliding end of the steel beam, the fixed end of the steel beam being welded to the corresponding embedded steel plate, the sliding end of the steel beam being mounted on the corresponding embedded steel plate, limiting members being respectively provided on both sides of the sliding end of the steel beam, a rock wool protective layer being provided between the limiting member and the steel beam, and the limiting member being fixed by an expansion bolt On the concrete wall, the height of the limiter is higher than the steel beam, and a Z-shaped protective cover is arranged on the top of the two limiters. The Z-shaped protective cover includes an outer protective plate, a top protective plate and a connecting and fixing plate. The top protective plate is located in the middle and is respectively perpendicular to the outer protective plate and the connecting and fixing plate, the top protective plate is located at the top of the steel beam, and the top protective plate is connected to the steel beam by connecting bolts. The outer protective plate is located at the end of the limiter away from the vertical surface of the L-shaped load-bearing step and turns downward, the connecting and fixing plate is located at the end of the limiter close to the vertical surface of the L-shaped load-bearing step and turns upward, the connecting and fixing plate is fitted with the vertical surface of the L-shaped load-bearing step, and the connecting and fixing plate is fixed to the vertical surface of the L-shaped load-bearing step by two expansion bolts.

[0007] Preferably, there is a distance between the limiting member and the vertical surface of the L-shaped load-bearing step.

[0008] Preferably, there is a distance between the outer protective plate and the limiting member.

[0009] Preferably, there is a distance between the bottom end of the outer protective plate and the steel beam.

[0010] Preferably, the limiting member is a channel steel and two channel steels are arranged back to back.

[0011] Preferably, the limiting member is a rectangular steel tube.

[0012] Preferably, at least two connecting bolts are provided.

[0013] Preferably, two expansion bolts 1 are provided, and three expansion bolts 2 are provided.

[0014] Preferably, the thickness of the rock wool protective layer is 30 mm to 100 mm.

[0015] A protective device for a sliding support of a steel beam on top of an exhaust tower comprises the following steps: Step 1: Concrete wall pouring. During pouring, embedded parts are respectively set on both sides of the top of the horizontal side of the L-shaped load-bearing step; Step 2: Install the steel beam, weld one end of the steel beam to the corresponding embedded part, and place the other end of the steel beam on the horizontal surface of the L-shaped load-bearing step; Step 3: Place a rock wool protective layer on both sides of the steel beam; Step 4: Install the limiter and fix the limiter on the horizontal side of the concrete wall with expansion bolts; Step 5: Place the Z-shaped protective cover on the limiter and fix the Z-shaped protective cover on the vertical side of the L-shaped load-bearing step through expansion bolt 2.

[0016] The beneficial effects of the present invention are as follows: the top steel beam of the exhaust tower of the protection device targeted by this embodiment is used to bear the load of the silencer element. In order to reduce temperature stress, one end of the steel beam is a fixed end and the other end is a sliding end for protection. 1) Both the limiter and the Z-shaped protective cover are detachably connected, so that the rock wool protective layer can be placed and there is no need to set a pre-buried steel plate on the vertical surface of the L-shaped load-bearing step; 2) the design of the Z-shaped protective cover is converted, and the connecting fixed plate is fixed on the vertical surface of the L-shaped load-bearing step to realize installation support, the top protective plate is used to protect the top of the sliding end of the steel beam to realize the top protection of the steel beam, and the outer protective plate is used to prevent rainwater and debris from entering the sliding support, 3) the limiter and the L The vertical surfaces of the bearing steps have spacing, which can form flow channels, achieve circulation and reduce corrosion, and achieve 1) Rock wool is a high temperature resistant and compressible material. Even if there is a certain construction error or thermal expansion, it will not affect the sliding of the steel beam; the rock wool protective layer can also prevent outdoor debris from entering the sliding support, and prevent excessive contact between air and the surface of the steel beam, causing rust; 2) It can prevent rainwater and debris from entering the sliding support; 3) Bolts or anchor bolts are used for connection to avoid sliding failure caused by on-site welding, making construction more convenient; 4) It is convenient for inspection and daily maintenance. The bolts can be unscrewed for inspection. Once a problem is found, it can be dealt with in time, thus saving a lot of manpower and material resources and achieving good results.

[0017] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention; the main purpose and other advantages of the present invention may be realized and obtained through the solutions particularly pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the background technology of the present invention; Figure 2 is a top view of the overall structure of the first embodiment of the present invention; Figure 3 is a structural side view of Embodiment 1 of the present invention; Figure 4 It is a structural front view of the first embodiment of the present invention.

[0019] Figure numerals: 1. concrete wall; 2. L-shaped load-bearing step; 3. steel beam; 4. embedded steel plate; 5. U-shaped protective cover; 6. limiter; 7. expansion bolt one; 8. rock wool protective layer; 9. Z-shaped protective cover; 10. outer protective plate; 11. top protective plate; 12. connecting fixing plate; 13. connecting bolt; 14. expansion bolt two. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is described in detail below through examples. The following examples are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, but cannot be interpreted as limiting the technical solution of the present invention.

[0021] Combination Figure 1-4 A protective device for a sliding support of a steel beam at the top of an exhaust tower comprises a concrete wall 1, the top of the concrete wall 1 is provided with an L-shaped load-bearing step 2, a plurality of parallel steel beams 3 are arranged on the L-shaped load-bearing step 2, one end of the steel beam 3 is a fixed end, and the other end is a sliding end, the L-shaped load-bearing step 2 is provided with embedded steel plates 4 at both the fixed end and the sliding end of the steel beam 3, the fixed end of the steel beam 3 is welded to the corresponding embedded steel plate 4, the sliding end of the steel beam 3 is laid on the corresponding embedded steel plate 4, limiting members 6 are respectively arranged on both sides of the steel beam 3, a rock wool protective layer 8 is arranged between the limiting member 6 and the steel beam 3, the limiting member 6 is fixed to the concrete wall 1 by an expansion bolt 7, the height of the limiting member 6 is higher than the steel beam 3, and the two limiting members are fixed to the concrete wall 1 by an expansion bolt 7. A Z-shaped protective cover 9 is arranged at the top of the positioning member 6, and the Z-shaped protective cover 9 includes an outer protective plate 10, a top protective plate 11 and a connecting and fixing plate 12. The top protective plate 11 is located in the middle and is respectively perpendicular to the outer protective plate 10 and the connecting and fixing plate 12. The top protective plate 11 is located at the top of the steel beam 3, and the top protective plate 11 is connected to the steel beam 3 by connecting bolts 13. The outer protective plate 10 is located at one end of the limiting member 6 away from the vertical surface of the L-shaped load-bearing step 2 and turns downward. The connecting and fixing plate 12 is located at one end of the limiting member 6 close to the vertical surface of the L-shaped load-bearing step 2 and turns upward. The connecting and fixing plate 12 is fitted with the vertical surface of the L-shaped load-bearing step 2, and the connecting and fixing plate 12 is fixed to the vertical surface of the L-shaped load-bearing step 2 by expansion bolts 14.

[0022] As a preferred solution of this embodiment, there is a distance between the limiting member 6 and the vertical surface of the L-shaped bearing step 2, which can form a flow channel to achieve circulation and reduce corrosion.

[0023] As a preferred solution of this embodiment, there is a distance between the outer protective plate 10 and the limiting member 6, which has a better protective effect and a better water-blocking effect.

[0024] As a preferred solution of this embodiment, there is a distance between the bottom end of the outer protective plate 10 and the steel beam 3 to allow for manufacturing errors.

[0025] As a preferred solution of this embodiment, the limiting member 6 is a channel steel and two channel steels are arranged back to back.

[0026] As a preferred solution of this embodiment, the limiting member 6 is a rectangular steel tube, and the limiting member 6 can be made of other steel materials that can achieve support and connection.

[0027] As a preferred solution of this embodiment, at least two connecting bolts 13 are provided.

[0028] As a preferred solution of this embodiment, two expansion bolts 1 7 are provided, and three expansion bolts 2 14 are provided.

[0029] As a preferred solution of this embodiment, the thickness of the rock wool protective layer 8 is 30 mm to 100 mm.

[0030] A protective device for the sliding support of the exhaust tower top steel beam 3 comprises the following steps: Step 1: Concrete wall 1 is poured, and embedded parts are respectively arranged on both sides of the top of the horizontal side of the L-shaped load-bearing step 2 during pouring; Step 2: Install the steel beam 3, weld one end of the steel beam 3 to the corresponding embedded part, and place the other end of the steel beam 3 on the horizontal plane of the L-shaped load-bearing step 2; Step 3: placing a rock wool protective layer 8 on both sides of the steel beam 3; Step 4: Install the limiter 6 and fix the limiter 6 to the horizontal side of the concrete wall 1 through the expansion bolt 7; Step 5: Place the Z-shaped protective cover 9 on the limiting member 6 , and fix the Z-shaped protective cover 9 on the vertical side of the L-shaped bearing step 2 by using the expansion bolts 14 .

[0031] The protection device of this embodiment is aimed at the top steel beam 3 of the exhaust tower to bear the load of the silencer element. In order to reduce temperature stress, the steel beam 3 is protected with one end as a fixed end and the other end as a sliding end. 1) The limiter 6 and the Z-shaped protective cover 9 are both detachably connected, so that the rock wool protective layer 8 can be placed and there is no need to set the embedded steel plate 4 on the vertical surface of the L-shaped load-bearing step 2; 2) The design of the Z-shaped protective cover 9 is converted, and the connecting fixing plate 12 is fixed on the vertical surface of the L-shaped load-bearing step 2 to achieve installation support, the top protective plate 11 is used to protect the top of the sliding end of the steel beam 3 to achieve top protection of the steel beam 3, and the outer protective plate 10 is used to prevent rainwater and debris from entering the sliding support, 3) the limiter 6 and The vertical surfaces of the L-shaped bearing step 2 have spacing, which can form a flow channel to achieve circulation and reduce corrosion, thereby achieving 1) rock wool is a high temperature resistant and compressible material, and even if there is a certain construction error or thermal expansion, it will not affect the sliding of the steel beam 3; the rock wool protective layer 8 can also prevent outdoor debris from entering the sliding support, and prevent excessive contact between air and the surface of the steel beam 3, which may cause rust; 2) it can prevent rainwater and debris from entering the sliding support; 3) bolts or anchor bolts are used for connection to avoid sliding failure caused by on-site welding, making construction more convenient; 4) it is convenient for inspection and daily maintenance, and the problem can be checked by unscrewing the bolts. Once a problem is found, it can be dealt with in time, thereby saving a lot of manpower and material resources and achieving very good results.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that a technician familiar with the technical field can think of within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. A protective device for a sliding support of a steel beam at the top of an exhaust tower, characterized in that: The invention comprises a concrete wall (1), wherein the top of the concrete wall (1) has an L-shaped load-bearing step (2), a plurality of parallel steel beams (3) are arranged on the L-shaped load-bearing step (2), one end of the steel beam (3) is a fixed end, and the other end is a sliding end, the L-shaped load-bearing step (2) is provided with embedded steel plates (4) at both the fixed end and the sliding end of the steel beam (3), the fixed end of the steel beam (3) is welded to the corresponding embedded steel plate (4), the sliding end of the steel beam (3) is mounted on the corresponding embedded steel plate (4), limiting members (6) are respectively arranged on both sides of the sliding end of the steel beam (3), a rock wool protective layer (8) is arranged between the limiting member (6) and the steel beam (3), the limiting member (6) is fixed to the concrete wall (1) by an expansion bolt (7), the height of the limiting member (6) is higher than that of the steel beam (3), the tops of the two limiting members (6) are provided with Z-shaped protective covers (9), and the Z-shaped protective covers ( 9) comprises an outer protective plate (10), a top protective plate (11) and a connecting and fixing plate (12), wherein the top protective plate (11) is located in the middle and is respectively perpendicular to the outer protective plate (10) and the connecting and fixing plate (12), the top protective plate (11) is located at the top end of the steel beam (3), the top protective plate (11) and the steel beam (3) are connected by connecting bolts (13), the outer protective plate (10) is located at the end of the limiting member (6) away from the vertical surface of the L-shaped load-bearing step (2) and is bent downward, the connecting and fixing plate (12) is located at the end of the limiting member (6) close to the vertical surface of the L-shaped load-bearing step (2) and is bent upward, the connecting and fixing plate (12) is in contact with the vertical surface of the L-shaped load-bearing step (2), and the connecting and fixing plate (12) is fixed to the vertical surface of the L-shaped load-bearing step (2) by expansion bolts (14).

2. A protective device for a sliding support of a steel beam at the top of an exhaust tower according to claim 1, characterized in that: There is a distance between the limiting member (6) and the vertical surface of the L-shaped bearing step (2).

3. A protective device for a sliding support of a steel beam at the top of an exhaust tower according to claim 2, characterized in that: The outer protection plate (10) and the limiting member (6) have a spacing therebetween.

4. The protective device for the sliding support of the exhaust tower top steel beam according to claim 3 is characterized in that: The bottom end of the outer protective plate (10) is spaced apart from the steel beam (3).

5. A protective device for a sliding support of a steel beam at the top of an exhaust tower according to claim 4, characterized in that: The limiting member (6) is a channel steel and two channel steels are arranged back to back.

6. A protective device for a sliding support of a steel beam at the top of an exhaust tower according to claim 4, characterized in that: The limiting member (6) is a rectangular steel tube.

7. The protective device for the sliding support of the exhaust tower top steel beam according to claim 5, characterized in that: At least two connecting bolts (13) are provided.

8. The protective device for the sliding support of the exhaust tower top steel beam according to claim 5, characterized in that: The first expansion bolt (7) is provided with two, and the second expansion bolt (14) is provided with three.

9. The protective device for the sliding support of the exhaust tower top steel beam according to claim 5, characterized in that: The thickness of the rock wool protective layer (8) is 30 mm to 100 mm.

10. A protective device for a sliding support of a steel beam at the top of an exhaust tower according to any one of claims 1 to 9, characterized in that: The following steps are included: Step 1: pouring the concrete wall (1), during which embedded parts are respectively arranged on both sides of the top of the horizontal side of the L-shaped load-bearing step (2); Step 2: Install the steel beam (3), weld one end of the steel beam (3) to the corresponding embedded part, and place the other end of the steel beam (3) on the horizontal plane of the L-shaped load-bearing step (2); Step 3: placing a rock wool protective layer (8) on both sides of the steel beam (3); Step 4: Install the limiting member (6), and fix the limiting member (6) to the horizontal side of the concrete wall (1) by using the expansion bolt 1 (7); Step 5: Place the Z-shaped protective cover (9) on the limiting member (6), and fix the Z-shaped protective cover (9) on the vertical side of the L-shaped bearing step (2) by using the expansion bolt 2.

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