Water cooling gap bridge

Abstract

The utility model discloses a water-cooling gap bridge, which relates to the technical field of corollary equipment of an iron-making blast furnace system, and comprises a gap bridge body with at least one hollow channel and at least one channel partition plate arranged in the gap bridge body, and the at least one channel partition plate divides the hollow channel into a plurality of cooling water channels which are arranged in parallel. A water inlet and a water outlet are respectively formed in two ends of each cooling water channel, and the hollow channel can fully cover the bridge crossing surface of the bridge crossing body; when the blast furnace is in an iron tapping state at the iron notch, all the cooling water channels are in a communicating state; and when the blast furnace is in a non-tapping state at the taphole, part of the cooling water channel is in a communicated state. The water-cooling gap bridge comprises the multiple cooling water channels arranged in parallel, all the cooling water channels are communicated when the blast furnace taphole is in the tapping state, part of the cooling water channels are communicated when the blast furnace taphole is in the non-tapping state, on the basis that the cooling effect is guaranteed, waste of resources and energy can be effectively avoided, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment for a blast furnace ironmaking system, and particularly relates to a water-cooled cross bridge. Background Art

[0002] During the tapping process of a blast furnace, the area above the taphole is in a high-temperature baking state. To ensure that the staff on the tuyere platform above the taphole can pass through, conduct inspections, and perform equipment maintenance normally, a water-cooled cross bridge is often arranged above the blast furnace taphole to isolate the baking of the molten iron below to a certain extent.

[0003] Existing blast furnace water-cooled cross bridges are mostly composed of a combination of channel steel, I-beam, H-beam, steel plates, etc., and generally only have one cooling water channel. The cooling water in such a blast furnace water-cooled cross bridge always maintains a constant water volume. Since the baking degrees of the water-cooled cross bridge during blast furnace tapping and non-tapping are different, there are the following problems in cooling the water-cooled cross bridge with a constant water volume: if the water volume is too small, the water-cooled cross bridge cannot be well protected during tapping, and cracking and deformation of the water-cooled cross bridge will occur under long-term baking; if the water volume is too large, it will cause waste of resources and energy during non-tapping and increase production costs.

[0004] Therefore, it is necessary to adjust the cooling water volume in the water-cooled cross bridge according to different working states of the water-cooled cross bridge to meet the requirements of the water-cooled cross bridge under different working conditions, so as to ensure a good cooling effect of the water-cooled cross bridge while taking into account the reduction of resource and energy consumption. Content of the Utility Model

[0005] The purpose of the utility model is to provide a water-cooled cross bridge to solve the problems in the prior art that the cooling water channel in the water-cooled cross bridge is single and the water-cooled cross bridge cannot take into account both the cooling effect and the saving of resources and energy.

[0006] The above object of the utility model can be achieved by adopting the following technical solutions:

[0007] The present utility model provides a water-cooled cross-over which is used in a blast furnace. The water-cooled cross-over includes a cross-over body having at least one hollow channel and at least one channel partition plate disposed within the cross-over body. At least one of the channel partition plates divides the hollow channel into a plurality of cooling water channels arranged in parallel. Each of the cooling water channels is provided with a water inlet and a water outlet at both ends respectively. The hollow channel can completely cover the cross-over surface of the cross-over body. When the blast furnace is in the state of tapping at the iron notch, all the cooling water channels are in a connected state, and cooling water can enter through the water inlets of each cooling water channel respectively, and after flowing through the cooling water channels, flow out from the water outlets of each cooling water channel. When the blast furnace is in the state of not tapping at the iron notch, some of the cooling water channels are in a connected state, and cooling water can enter through the water inlets of the connected cooling water channels, and after flowing through the cooling water channels, flow out from the water outlets of the connected cooling water channels.

[0008] Preferably, the cooling water channels include a first cooling water channel and a second cooling water channel arranged in parallel in an S shape. The two ends of the first cooling water channel are respectively provided with a first water inlet and a first water outlet, and the two ends of the second cooling water channel are respectively provided with a second water inlet and a second water outlet. When the blast furnace is in the state of tapping at the iron notch, both the first cooling water channel and the second cooling water channel are in a connected state. When the blast furnace is in the state of not tapping at the iron notch, either the first cooling water channel or the second cooling water channel is in a connected state.

[0009] Preferably, the cross-over body includes a closed body outer frame and a plurality of support ribs connected in parallel and spaced apart on the inner wall of the body outer frame. The hollow channel is formed between adjacent two of the support ribs. Two water passing holes are provided at intervals near the same end of the support ribs, and the water passing holes of adjacent two support ribs are respectively arranged near the opposite side walls of the body outer frame.

[0010] Specifically, the channel partition plate includes a first channel partition plate and a second channel partition plate connected vertically. The longitudinal extension direction of the first channel partition plate is opposite to the longitudinal extension direction of the support rib. The second channel partition plate is connected to both sides of the support rib, and the second channel partition plate is located between the two water passing holes of the support rib.

[0011] Preferably, the cross-over body further includes a horizontal partition plate disposed within the body outer frame. The horizontal partition plate divides the hollow channel into an air-cooling channel area and a water-cooling channel area along the gravity direction. The channel partition plate is disposed within the water-cooling channel area, and the water passing holes are disposed on the rib segments of the support ribs located in the water-cooling channel area.

[0012] Specifically, the horizontal partition plate includes multiple small horizontal partition plates, and the circumferences of the small horizontal partition plates are respectively connected to the inner side wall of the body outer frame and the support ribs.

[0013] Preferably, the support rib is in an H shape and includes a web and flanges vertically connected to both ends of the web, and the thickness direction of the flanges is parallel to the direction of gravity.

[0014] Specifically, the body outer frame includes a top plate, a bottom plate arranged in parallel, and a circumferential side plate connected between the top plate and the bottom plate. The top plate and the bottom plate are respectively connected to the two flanges of the support rib, and one pair of opposite circumferential side plates are respectively connected to both ends of the support rib.

[0015] Specifically, the first water inlet and the second water inlet are arranged on the same circumferential side plate, or the first water inlet and the second water inlet are respectively arranged on two opposite circumferential side plates.

[0016] Preferably, the circumferential side plate is in a U shape and includes a bottom plate and waist plates vertically connected to both ends of the bottom plate, and the thickness direction of the waist plates is parallel to the direction of gravity.

[0017] The features and advantages of the present utility model are as follows: The water-cooled cross bridge provided by the present utility model includes a plurality of cooling water channels arranged in parallel, and all the cooling water channels are connected when the blast furnace taphole is in the tapping state, and part of the cooling water channels are connected when the blast furnace taphole is in the non-tapping state. On the basis of ensuring the cooling effect, it can effectively avoid waste of resources and energy and reduce production costs. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is the top view of the water-cooled cross bridge provided in the embodiment of the present utility model;

[0020] Figure 2 It is the left view of the water-cooled cross bridge provided in the embodiment of the present utility model.

[0021] Explanation of the Reference Numerals in the Drawings:

[0022] 100, cross bridge body; 110, support rib; 120, top plate; 130, bottom plate; 140, circumferential side plate;

[0023] 200, Channel separator; 210, First channel separator; 220, Second channel separator;

[0024] 300, First water inlet pipeline;

[0025] 400, First water outlet pipeline;

[0026] 500, Second water inlet pipeline;

[0027] 600, Second water outlet pipeline;

[0028] 700, Horizontal separator; 710, Horizontal small separator;

[0029] 10, First cooling water channel;

[0030] 20, Second cooling water channel. Detailed implementation mode

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] As Figures 1 to 2 shown, the present invention provides a water-cooled cross bridge, which is used in a blast furnace. It includes a cross bridge body 100 having at least one hollow channel and at least one channel separator 200 disposed in the cross bridge body 100. The at least one channel separator 200 divides the hollow channel into a plurality of cooling water channels arranged in parallel. Water inlets and outlets are respectively provided at both ends of each cooling water channel. The hollow channel can completely cover the bridge deck of the cross bridge body 100; when the blast furnace is in the state of tapping at the iron notch, all the cooling water channels are in a connected state, and cooling water can enter through the water inlets of each cooling water channel respectively, and after flowing through the cooling water channels, flow out from the water outlets of each cooling water channel; when the blast furnace is in the state of not tapping at the iron notch, some of the cooling water channels are in a connected state, and cooling water can enter through the water inlets of the cooling water channels in the connected state, and after flowing through the cooling water channels, flow out from the water outlets of the cooling water channels in the connected state.

[0033] Specifically, as shown in FIGS. 1 and Figure 2As shown in the figure, a plurality of hollow channels covering the entire bridge surface of the bridge body 100 are formed inside the bridge body 100. At least one channel partition plate 200 extending along the channel direction is provided in each hollow channel. By setting the channel partition plate 200, each hollow channel is divided into a plurality of cooling water channels arranged in parallel. At the two ends of each cooling water channel connected to the bridge body 100, a water inlet and a water outlet are respectively provided. A water inlet pipe is connected to the water inlet, and a water outlet pipe is connected to the water outlet. Among them, the plurality of hollow channels can be connected in an S shape to form a total channel that completely covers the bridge surface of the bridge body 100, or they can be non-connected and completely cover the bridge surface of the bridge body 100 through parallel arrangement. In this way, the plurality of cooling water channels formed by partitioning the hollow channels can also completely cover the bridge surface of the bridge body 100, so that the cooling water can uniformly cool the bridge surface of the bridge body 100 through the plurality of cooling water channels, thereby ensuring the cooling effect of the water-cooled bridge. Further, in order to save resources and energy while ensuring the cooling effect of the water-cooled bridge, whether each cooling water channel is in a connected state or a disconnected state is related to the state of the blast furnace at the iron notch. Specifically, when the blast furnace is in the iron tapping state at the iron notch, the area above the iron notch is severely baked by the molten iron. To ensure the cooling effect of the water-cooled bridge, all the cooling water channels are in a connected state to ensure that sufficient cooling water enters the water-cooled bridge and completely covers the bridge surface, thereby improving the cooling effect of the water-cooled bridge and coping with the high-temperature baking under the iron tapping condition of the blast furnace; when the blast furnace is in the non-iron tapping state at the iron notch, the area above the iron notch is relatively less baked by the molten iron, and only connecting some of the cooling water channels can ensure the cooling effect of the water-cooled bridge. Preferably, one of the two adjacent cooling water channels is in a connected state, that is, one out of every two of the plurality of cooling water channels arranged in parallel is connected and the other is disconnected. Preferably, the water inlet pipe and the water outlet pipe are connected through a water system. In this way, the cooling water flowing through the water-cooled bridge and carrying heat is discharged into the water system for cooling through the water outlet pipe connected to the outlet of each cooling water channel, and flows back into the water-cooled bridge through the water inlet pipe connected to the inlet of each cooling water channel for recycling.

[0034] According to an embodiment of the present invention, the cooling water channels include a first cooling water channel 10 and a second cooling water channel 20 arranged in parallel in an S shape. A first water inlet and a first water outlet are respectively provided at both ends of the first cooling water channel 10, and a second water inlet and a second water outlet are respectively provided at both ends of the second cooling water channel 20; when the blast furnace is in the iron tapping state at the iron notch, both the first cooling water channel 10 and the second cooling water channel 20 are in a connected state; when the blast furnace is in the non-iron tapping state at the iron notch, either the first cooling water channel 10 or the second cooling water channel 20 is in a connected state. Specifically, as Figure 2As shown, multiple hollow channels are formed in the bridge body 100 and are arranged in parallel. A channel partition plate 200 with a corner plate surface is arranged in each hollow channel to divide it into two cooling water channels. The channel partition plate 200 is connected to the wall surface of the hollow channel through the corner plate surface. The wall surfaces between adjacent two hollow channels are opened on both sides connected to the channel partition plate 200, so that the two cooling water channels in each hollow channel are correspondingly connected to form a first cooling water channel 10 and a second cooling water channel 20 arranged in an S-shaped parallel connection. The two ends of the first cooling water channel 10 are respectively provided with a first water inlet and a first water outlet on the wall surface of the bridge body 100. The two ends of the second cooling water channel 20 are respectively provided with a second water inlet and a second water outlet on the wall surface of the bridge body 100. A first water inlet pipe 300 and a first water outlet pipe 400 are respectively connected to the first water inlet and the first water outlet. A second water inlet pipe 500 and a second water outlet pipe 600 are respectively connected to the second water inlet and the second water outlet. When the blast furnace is in the state of tapping at the iron notch, both the first cooling water channel 10 and the second cooling water channel 20 are in a connected state. Cooling water flows into the first cooling water channel 10 and the second cooling water channel 20 from the first water inlet pipe 300 and the second water inlet pipe 500, cools the water-cooled bridge, and then flows out through the second water inlet pipe 500 and the second water outlet pipe 600 to enter the water system after carrying heat. When the blast furnace is in the state of not tapping at the iron notch, one of the first cooling water channel 10 and the second cooling water channel 20 is in a connected state. Through the first cooling water channel 10 and the second cooling water channel 20 arranged in an S shape, the entire surface of the bridge surface of the bridge body 100 is covered. It can not only better cover most areas of the water-cooled bridge in the state of the blast furnace not tapping, achieving a better cooling effect on the bridge, but also reduce the number of openings of the water inlets and outlets on the bridge body 100, taking into account both the structural strength and economic benefits.

[0035] According to an embodiment of the present invention, the bridge body 100 includes a closed body outer frame and multiple support ribs 110 connected in parallel and spaced on the inner wall of the body outer frame. A hollow channel is formed between adjacent two support ribs 110. Two water passing holes are arranged at intervals near the same end of the support ribs 110. The water passing holes of adjacent two support ribs 110 are respectively arranged near the opposite side walls of the body outer frame. Specifically, as Figure 1 and Figure 2As shown in the figure, the support ribs 110 provided on the inner wall of the outer frame of the main body form the wall surface between two adjacent hollow channels. The channel partition plate 200 is connected to the support ribs 110 through the corner plate surface. Two water passing holes are provided near the two sides of the support ribs 110 connected to the channel partition plate 200. In this way, after the cooling water flows through the cooling water channels, it flows back and forth between the two opposite side walls of the outer frame of the main body, so as to ensure that the cooling water can cover most areas of the water-cooled bridge with a constant water volume in the state where some cooling water channels are connected, and the cooling water can cover the entire water-cooled bridge with a constant water volume in the state where all cooling water channels are connected.

[0036] According to an embodiment of the present invention, as Figure 2 shown, the support rib 110 is in an H shape, including a web and flanges vertically connected to both ends of the web. The thickness direction of the flanges is parallel to the direction of gravity. Specifically, the support rib 110 is made of H-shaped steel or I-shaped steel, and the thickness direction of its flanges is parallel to the direction of gravity. In this way, both the structural strength of the bridge body 100 can be improved and the support for the bridge surface can be enhanced.

[0037] According to an embodiment of the present invention, as Figure 2 shown, the outer frame of the main body includes a top plate 120, a bottom plate 130 arranged in parallel, and a circumferential side plate 140 connected between the top plate 120 and the bottom plate 130. The top plate 120 and the bottom plate 130 are respectively connected to the two flanges of the support rib 110. One pair of opposite circumferential side plates 140 are respectively connected to both ends of the support rib 110. Preferably, the top plate 120, the bottom plate 130, the circumferential side plate 140, the support rib 110, the horizontal partition small plate 710 and the channel partition plate 200 are all made of Q235B steel, and the components are connected by welding to form the water-cooled bridge.

[0038] According to an embodiment of the present invention, the circumferential side plate 140 is in a U shape, including a bottom plate 130 and waist plates vertically connected to both ends of the bottom plate 130. The thickness direction of the waist plates is parallel to the direction of gravity. Specifically, as Figure 2 shown, the circumferential side plate 140 is made of channel steel, and the thickness direction of its waist plates is parallel to the direction of gravity, and the notch of each circumferential side plate 140 faces the inside of the bridge body 100 to further improve the support for the bridge surface.

[0039] According to an embodiment of the present utility model, the first water inlet and the second water inlet are provided on the same circumferential side plate 140, or the first water inlet and the second water inlet are respectively provided on two relatively arranged circumferential side plates 140, that is, the flowing direction of the cooling water in the first cooling water channel 10 is the same as the flowing direction of the cooling water in the second cooling water channel 20, or the flowing direction of the cooling water in the first cooling water channel 10 is opposite to the flowing direction of the cooling water in the second cooling water channel 20. Preferably, in order to make the cooling of the bridge surface of the bridge body 100 more uniform, the first water inlet and the second water inlet are respectively provided on two relatively arranged circumferential side plates 140.

[0040] According to an embodiment of the present utility model, as Figure 1 shown, the channel partition plate 200 includes a first channel partition plate 210 and a second channel partition plate 220 which are vertically connected. The longitudinal extension direction of the first channel partition plate 210 is consistent with the opposite direction of the longitudinal extension of the support rib 110. The second channel partition plate 220 is connected to both sides of the support rib 110, and the second channel partition plate 220 is located between two water passing holes of the support rib 110, that is, the channel partition plate 200 in the outermost two hollow channels of the bridge body 100 is in an L shape, including a first channel partition plate 210 and a second channel partition plate 220; the channel partition plate 200 in the middle hollow channel is in a Z shape, including a first channel partition plate 210 and two second channel partition plates 220 vertically connected to both ends of the first channel partition plate 210. Among them, the channel partition plate 200 can be formed by welding the first channel partition plate 210 and the second channel partition plate 220, or the channel partition plate 200 can be bent to form the first channel partition plate 210 and the second channel partition plate 220. The present utility model does not limit this.

[0041] According to an embodiment of the present utility model, as Figure 2 shown, the bridge body 100 further includes a horizontal partition plate 700 provided inside the outer frame of the body. The horizontal partition plate 700 divides the hollow channel into an air-cooling channel area and a water-cooling channel area along the gravity direction. A channel partition plate 200 is provided in the water-cooling channel area, and the water passing holes are provided on the rib section of the support rib 110 located in the water-cooling channel area. By dividing the bridge body 100 into an upper air-cooling channel area and a lower water-cooling channel area, on the basis of ensuring the cooling effect, the load-bearing capacity of the bridge body 100 is reduced, and the safety and service life of the water-cooled bridge are improved. Preferably, the height of the air-cooling channel area is greater than the height of the water-cooling channel area.

[0042] According to an embodiment of the present utility model, as Figure 2 shown, for the convenience of the production and processing of the bridge body 100, the horizontal partition plate 700 includes a plurality of horizontal partition small plates 710, and each horizontal partition small plate 710 is circumferentially connected to the inner side wall of the outer frame of the body and the support rib 110 respectively.

[0043] Exemplarily, the length of the water-cooled cross bridge is set to 8000 mm, the width is set to 1000 mm, the height is set to 220 mm, the horizontal partition plate 700 is arranged 70 mm away from the bottom plate, two water-cooling channels in an S shape are arranged in parallel in the cross bridge body 100, the flowing directions of the cooling water in the two water-cooling channels are set to be the same, the distance between the water inlets of the two is set to 120 mm, the diameter of the water inlet pipe connected at the water inlet is set to 38 mm, the water outlet settings of the two are the same as the water inlet settings, and the water outlet pipe settings are the same as the water inlet pipe settings.

[0044] Based on the above description, the water-cooled cross bridge provided in the embodiment of the present invention has the following beneficial effects:

[0045] The water-cooled cross bridge provided in the embodiment of the present invention includes a plurality of water-cooling channels arranged in parallel, and all the water-cooling channels are connected when the blast furnace taphole is in the tapping state, and part of the water-cooling channels are connected when the blast furnace taphole is in the non-tapping state. On the basis of ensuring the cooling effect, it can effectively avoid the waste of resources and energy and reduce the production cost; at the same time, the horizontal partition plate 700 is arranged to divide the cross bridge body 100 into an air-cooling channel area above and a water-cooling channel area below. On the basis of ensuring the cooling effect, the load-bearing capacity of the cross bridge body 100 is reduced, and the safety and service life of the water-cooled cross bridge are improved.

[0046] The above are only several embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention according to the content disclosed in the application documents.

Claims

1. A water-cooled bridge, the water-cooled bridge being used in a blast furnace, characterized in that: The invention comprises a bridge body having at least one hollow channel and at least one channel dividing plate arranged in the bridge body, wherein the at least one channel dividing plate divides the hollow channel into a plurality of cooling water channels arranged in parallel, and a water inlet and a water outlet are respectively arranged at both ends of each cooling water channel, and the hollow channel can fully cover the bridge surface of the bridge body; When the blast furnace is in the iron tapping state at the iron mouth, all the cooling water channels are in a connected state, and cooling water can enter through the water inlet of each cooling water channel respectively, flow through the cooling water channel, and then flow out from the water outlet of each cooling water channel; When the blast furnace is in a non-iron-discharging state at the iron mouth, part of the cooling water channels are in a connected state, and cooling water can enter through the water inlet of the cooling water channel in the connected state, flow through the cooling water channel, and then flow out from the water outlet of the cooling water channel in the connected state.

2. A water-cooled bridge according to claim 1, characterized in that: The cooling water channel comprises a first cooling water channel and a second cooling water channel which are arranged in parallel in an S shape, wherein two ends of the first cooling water channel are respectively provided with a first water inlet and a first water outlet, and two ends of the second cooling water channel are respectively provided with a second water inlet and a second water outlet; When the blast furnace is in a state of tapping iron at the iron mouth, the first cooling water channel and the second cooling water channel are both in a connected state; When the blast furnace is in a non-iron-discharging state at the iron mouth, the first cooling water channel or the second cooling water channel is in a connected state.

3. A water-cooled bridge according to claim 2, characterized in that: The bridge body includes a closed body outer frame and a plurality of support ribs connected in parallel and at intervals to the inner wall of the body outer frame, wherein the hollow channel is formed between two adjacent support ribs, and two water holes are provided at intervals near the same end of the support ribs, and the water holes of the two adjacent support ribs are respectively provided near the two side walls of the body outer frame which are oppositely arranged.

4. The water-cooled bridge according to claim 3 is characterized in that: The channel dividing plate includes a first channel dividing plate and a second channel dividing plate which are vertically connected. The longitudinal extension direction of the first channel dividing plate is consistent with the opposite direction of the longitudinal extension of the supporting rib. The second channel dividing plate is connected to both sides of the supporting rib, and the second channel dividing plate is located between the two water holes of the supporting rib.

5. The water-cooled bridge according to claim 4 is characterized in that: The bridge body also includes a horizontal partition plate arranged in the outer frame of the body, and the horizontal partition plate divides the hollow channel into an air-cooling channel area and a water-cooling channel area along the direction of gravity. The channel partition plate is arranged in the water-cooling channel area, and the water hole is arranged on the rib section of the support rib located in the water-cooling channel area.

6. The water-cooled bridge according to claim 5, characterized in that: The horizontal partition plate includes a plurality of horizontal partition small plates, and each of the horizontal partition small plates is circumferentially connected to the inner side wall of the main body outer frame and the supporting ribs.

7. The water-cooled bridge according to claim 3 is characterized in that: The supporting rib is H-shaped, and comprises a web and flanges vertically connected to both ends of the web, and the thickness direction of the flange is parallel to the gravity direction.

8. The water-cooled bridge according to claim 7, characterized in that: The main body outer frame includes a top plate, a bottom plate, and a circumferential side plate connected between the top plate and the bottom plate. The top plate and the bottom plate are respectively connected to the two flanges of the support rib, and a pair of oppositely arranged two circumferential side plates are respectively connected to the two ends of the support rib.

9. The water-cooled bridge according to claim 8, characterized in that: The first water inlet and the second water inlet are arranged on the same circumferential side plate, or the first water inlet and the second water inlet are respectively arranged on two circumferential side plates arranged opposite to each other.

10. The water-cooled bridge according to claim 9, characterized in that: The circumferential side plate is U-shaped, and comprises a bottom plate and waist plates vertically connected to both ends of the bottom plate, and the thickness direction of the waist plate is parallel to the gravity direction.

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