External pressure equalizing structure capable of shortening furnace changing time of hot-blast stove

Abstract

The utility model belongs to the technical field of hot-blast stoves, and discloses an external pressure equalizing structure for accelerating hot-blast stove replacement time, which comprises a hot-blast stove pipe body assembly, and a first hot-blast stove body, a second hot-blast stove body, a third hot-blast stove body and a high-pressure gas storage tank are respectively arranged on one side of the outside of the hot-blast stove pipe body assembly; the first hot-blast stove body, the second hot-blast stove body and the third hot-blast stove body are horizontally and uniformly distributed on one side of the hot-blast stove pipe body assembly; under the three-section type branch pipe design of the stamping main pipeline, the bent pipes, the first sleeve discs, the second sleeve discs, the sealing pieces and the locking assemblies are arranged in cooperation with the positions of all the sections, the three-section type branch pipes are fixedly connected in a sealed mode, and meanwhile the sectional type disassembly effect on all the branch pipes on the stamping main pipeline can be achieved when needed; and therefore, the overhaul and maintenance work of the stamping main pipeline is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of hot blast stoves, and more specifically, to an external pressure equalizing structure for accelerating the replacement time of hot blast stoves. Background Art

[0002] The blast furnace hot blast stove is composed of three catenary top-fired hot blast stoves, which adopt the "two burning and one sending" air supply mode to work. In the normal production process, the three hot blast stoves work alternately to achieve the uninterrupted air supply requirement of the blast furnace. The working process of each hot blast stove is the same, that is, "combustion" -> "stifling furnace A" -> "air supply" -> "stifling furnace B" -> "combustion", and the conversion between various states is carried out periodically. Among them, the "stifling furnace A" and "stifling furnace B" states, that is, the hot blast stove performs the necessary filling and exhausting process before the air supply and combustion state conversion, and the relevant valves are opened and closed in coordination to realize the conversion process between the above various states.

[0003] After searching the publication number: CN218465864U, an external pressure equalizing device for speeding up the hot blast furnace changing time is disclosed, including a hot blast furnace pipe body assembly, on which a first hot blast furnace body, a second hot blast furnace body and a third hot blast furnace body are provided; this application can eliminate the influence of hot blast furnace changing on blast furnace blasting, reduce or avoid fluctuations in blast furnace conditions caused by changing furnaces, and improve the risk resistance of the hot blast furnace, especially when one of the hot blast furnaces is forced to stop for maintenance, maintain a certain wind temperature level so that the entire production line is not forced to stop.

[0004] However, in this application, since the main stamping pipeline is of a relatively long integrated design, it is inconvenient to inspect and maintain the main stamping pipeline when necessary during long-term use.

[0005] In order to solve the above problems, the present application provides an external pressure equalization structure that speeds up the hot blast stove replacement time. Utility Model Content

[0006] The external pressure equalization structure provided in the present application to accelerate the hot blast furnace replacement time adopts the following technical solution:

[0007] An external pressure equalizing structure for accelerating the replacement time of a hot blast stove comprises a hot blast stove pipe assembly, wherein a first hot blast stove body, a second hot blast stove body, a third hot blast stove body and a high-pressure gas storage tank are respectively arranged on one side of the outside of the hot blast stove pipe assembly, wherein the first hot blast stove body, the second hot blast stove body and the third hot blast stove body are evenly distributed horizontally on one side of the hot blast stove pipe assembly, and a stamping main pipeline is commonly arranged at the connection between the first hot blast stove body, the second hot blast stove body, the third hot blast stove body and the high-pressure gas storage tank;

[0008] The stamping main pipeline includes three branch pipes, which are distributed in a "Z" shape, and the connection between two adjacent branch pipes is provided with a bend in a contacting manner. The outer wall of the branch pipe facing the bend is fixedly sleeved with a first set of discs, and the outer wall of the bend facing the branch pipe is fixedly sleeved with a second set of discs, and three groups of locking components are evenly arranged on the circumference of the connection between the outer walls of the first set of discs and the second set of discs.

[0009] Through the above technical solution, the elbow realizes the connection between two vertically distributed branch pipes.

[0010] Furthermore, sealing sheets are fixedly installed on opposite end surfaces of the first set of discs and the second set of discs, and opposite end surfaces of the first set of discs and the second set of discs are abutted against each other through sealing sheets, and the sealing sheets on both sides are respectively located on the outside of one end of the branch pipe and the bent pipe.

[0011] Through the above technical solution, the sealing sheet can ensure the butt sealing between the first set of discs and the second set of discs.

[0012] Furthermore, the locking assembly includes an ear block fixedly mounted on the outer wall of the second set of discs, a locking screw is threadedly connected through the inner cavity of the ear block, one end of the locking screw is fixedly connected to the I-shaped shaft, and the other end of the locking screw is fixedly connected to the rotating wheel, a connecting arm is slidably sleeved on the outer wall of the middle part of the I-shaped shaft, and a clamping column is fixedly mounted on the side wall of the connecting arm at one end away from the I-shaped shaft.

[0013] Through the above technical solution, the I-shaped shaft realizes the rotational limiting bearing function of the connecting arm.

[0014] Furthermore, a plurality of anti-skid grooves are evenly arranged on the circumference of the outer wall of the rotating wheel, and each anti-skid groove is in a semi-cylindrical groove structure.

[0015] Furthermore, the locking assembly also includes a slot formed on a side wall of the first sleeve, and the slot is adapted to be snap-fitted with one end of the post.

[0016] Through the above technical solution, the card slot realizes the docking card adaptation function with the card column.

[0017] Furthermore, a first check valve, a second check valve, and an orifice plate are respectively provided on one side of the stamping main pipeline close to the high-pressure gas storage tank, and a pressure reducing valve is provided in the middle of the stamping main pipeline.

[0018] Furthermore, the first hot blast furnace body, the second hot blast furnace body and the third hot blast furnace body are all provided with external pressure equalizing pipelines, and the three external pressure equalizing pipelines are connected to the stamping main pipeline through the compressed air duct, and each compressed air duct is provided with a manual shut-off valve and a pneumatic pressure equalizing valve.

[0019] In summary, this application includes the following beneficial technical effects:

[0020] By designing the stamping main pipeline into three sections, the elbows, the first set of discs, the second set of discs, the sealing sheets and the locking components arranged between each section can realize a fixed and sealed connection between the three sections of the branch pipes. At the same time, each branch pipe on the stamping main pipeline can be disassembled in sections when necessary, thereby facilitating the inspection and maintenance of the stamping main pipeline itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of this application;

[0022] Figure 2 It is a schematic diagram of the local structure of this application;

[0023] Figure 3 This is a partial semi-exploded view of this application.

[0024] Description of the numbers in the figure:

[0025] 1. Hot blast furnace pipe body assembly; 2. First hot blast furnace body; 3. Second hot blast furnace body; 4. Third hot blast furnace body; 5. High-pressure gas storage tank; 6. Stamping main pipeline; 61. Branch pipe; 62. Bend pipe; 63. First set of discs; 64. Second set of discs; 65. Ear block; 66. Locking screw; 67. I-shaped shaft; 68. Connecting arm; 69. Clamping column; 610. Rotating wheel; 611. Clamping slot. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0027] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] Example:

[0030] The present application embodiment discloses an external pressure equalization structure for accelerating the hot blast furnace replacement time. Figure 1 , Figure 2 and Figure 3 , comprising a hot blast stove pipe assembly 1, a first hot blast stove body 2, a second hot blast stove body 3, a third hot blast stove body 4, and a high-pressure gas storage tank 5 are respectively arranged on one side of the outside of the hot blast stove pipe assembly 1, the first hot blast stove body 2, the second hot blast stove body 3, and the third hot blast stove body 4 are evenly distributed horizontally on one side of the hot blast stove pipe assembly 1, and a stamping main pipeline 6 is commonly arranged at the connection between the first hot blast stove body 2, the second hot blast stove body 3, the third hot blast stove body 4 and the high-pressure gas storage tank 5;

[0031] The stamping main pipeline 6 includes three branch pipes 61, which are distributed in a "Z" shape, and the connection between two adjacent branch pipes 61 is provided with a bend pipe 62 in a contacting manner, and the outer wall of the branch pipe 61 facing the bend pipe 62 is fixedly sleeved with a first set of discs 63, and the outer wall of the bend pipe 62 facing the branch pipe 61 is fixedly sleeved with a second set of discs 64, and the connection between the outer walls of the first set of discs 63 and the second set of discs 64 is uniformly provided with three sets of locking components, and the opposite end faces of the first set of discs 63 and the second set of discs 64 are fixedly installed with sealing sheets, and the opposite end faces of the first set of discs 63 and the second set of discs 64 are abutted by sealing sheets, and the sealing sheets on both sides are respectively located on the outer sides of one end of the branch pipe 61 and the bend pipe 62;

[0032] The locking assembly includes an ear block 65 fixedly mounted on the outer wall of the second set of discs 64, a locking screw 66 is threadedly connected through the inner cavity of the ear block 65, one end of the locking screw 66 is fixedly connected to the I-shaped shaft 67, and the other end of the locking screw 66 is fixedly connected to the rotating wheel 610, a connecting arm 68 is slidably sleeved on the outer wall of the middle part of the I-shaped shaft 67, and a clamping column 69 is fixedly mounted on the side wall of the end of the connecting arm 68 away from the I-shaped shaft 67, and a plurality of anti-skid grooves are evenly opened on the circumference of the outer wall of the rotating wheel 610, and each anti-skid groove is a semi-cylindrical groove structure, and the provision of the anti-skid grooves can facilitate the staff to rotate the rotating wheel 610;

[0033] The locking assembly further includes a slot 611 formed on a side wall of the first sleeve 63 , and the slot 611 is adapted to be snap-fitted with one end of the post 69 .

[0034] See also Figure 1 , and combined with the content in the comparative document publication number: CN218465864U, the first check valve, the second check valve, and the orifice plate are respectively arranged on the side of the stamping main pipeline 6 close to the high-pressure gas storage tank 5, and a pressure reducing valve is arranged in the middle position of the stamping main pipeline 6, and the first hot blast furnace body 2, the second hot blast furnace body 3, and the third hot blast furnace body 4 are all provided with external equalizing pressure pipelines, and the three external equalizing pressure pipelines are connected to the stamping main pipeline 6 through the compressed air duct, and each compressed air duct is provided with a manual shut-off valve and a pneumatic equalizing pressure valve, wherein, the effect of hot blast furnace replacement on blast furnace blast is eliminated, the fluctuation of blast furnace condition caused by furnace replacement is reduced or avoided, and the risk resistance of the hot blast furnace is improved, especially when one of the hot blast furnaces is forced to stop for maintenance, a certain wind temperature level is maintained so that the entire production line is not forced to stop. The specific application principle of the effect can be referred to the content in the comparative document, and no further elaboration will be made in this application.

[0035] The implementation principle of this embodiment is: when the main stamping pipeline 6 needs to be inspected and maintained after long-term use, the main stamping pipeline 6 can be inspected and maintained in sections by disassembling different branch pipes 61 and elbows 62;

[0036] When performing the disassembly operation between a branch pipe 61 and a bent pipe 62, it is necessary to utilize the rotation of the locking screw 66 by the rotating wheel 610 on each set of locking components between the two, and cooperate with the rotation connection of the I-shaped shaft 67 between the locking screw 66 and the connecting arm 68, so as to indirectly push the connecting arm 68 to drive the clamping column 69 to move in a straight line, until the clamping column 69 is completely disengaged from the clamping groove 611, and then cooperate with the swinging away action of the connecting arm 68 to realize the separation operation of the first set of discs 63 and the second set of discs 64 between the branch pipe 61 and the bent pipe 62.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An external pressure equalization structure for accelerating the replacement time of a hot blast stove, comprising a hot blast stove tube assembly (1), characterized in that: A first hot blast stove body (2), a second hot blast stove body (3), a third hot blast stove body (4), and a high-pressure gas storage tank (5) are respectively arranged on one side of the exterior of the hot blast stove pipe body assembly (1); the first hot blast stove body (2), the second hot blast stove body (3), and the third hot blast stove body (4) are evenly distributed horizontally on one side of the hot blast stove pipe body assembly (1); and a stamping main pipeline (6) is commonly arranged at the connection between the first hot blast stove body (2), the second hot blast stove body (3), the third hot blast stove body (4), and the high-pressure gas storage tank (5); The stamping main pipeline (6) comprises three branch pipes (61), the three branch pipes (61) are distributed in a "Z" shape, and the connection between two adjacent branch pipes (61) is provided with a bent pipe (62) in a contacting manner, the outer wall of the branch pipe (61) on one side facing the bent pipe (62) is fixedly sleeved with a first sleeve disc (63), and the outer wall of the bent pipe (62) on one side facing the branch pipe (61) is fixedly sleeved with a second sleeve disc (64), and three sets of locking components are evenly arranged on the circumference of the connection between the outer walls of the first sleeve disc (63) and the second sleeve disc (64).

2. The external pressure equalization structure for accelerating the hot blast stove replacement time according to claim 1, characterized in that: The first set of discs (63) and the second set of discs (64) have sealing sheets fixedly mounted on their opposite end surfaces, and the first set of discs (63) and the second set of discs (64) are in contact with each other via the sealing sheets, while the sealing sheets on both sides are respectively located on the outside of one end of the branch pipe (61) and the bent pipe (62).

3. The external pressure equalization structure for accelerating the hot blast stove replacement time according to claim 1, characterized in that: The locking assembly comprises an ear block (65) fixedly mounted on the outer wall of the second sleeve (64); a locking screw (66) is threadedly connected through the inner cavity of the ear block (65); one end of the locking screw (66) is fixedly connected to an I-shaped shaft (67); and the other end of the locking screw (66) is fixedly connected to a rotating wheel (610); a connecting arm (68) is slidably sleeved on the outer wall of the middle part of the I-shaped shaft (67); and a clamping column (69) is fixedly mounted on the side wall of one end of the connecting arm (68) away from the I-shaped shaft (67).

4. The external pressure equalization structure for accelerating the hot blast stove replacement time according to claim 3, characterized in that: The outer wall of the rotating wheel (610) is evenly provided with a plurality of anti-skid grooves on its circumference, and each anti-skid groove is in a semi-cylindrical groove structure.

5. The external pressure equalization structure for accelerating the hot blast stove replacement time according to claim 3, characterized in that: The locking assembly further comprises a clamping groove (611) formed on a side wall of the first sleeve (63), wherein the clamping groove (611) is clamped and adapted to one end of the clamping column (69).

6. The external pressure equalization structure for accelerating the hot blast stove replacement time according to claim 1, characterized in that: A first check valve, a second check valve and an orifice plate are respectively arranged on one side of the stamping main pipeline (6) close to the high-pressure gas storage tank (5), and a pressure reducing valve is arranged in the middle of the stamping main pipeline (6).

7. The external pressure equalization structure for accelerating the hot blast stove replacement time according to claim 1, characterized in that: The first hot blast furnace body (2), the second hot blast furnace body (3) and the third hot blast furnace body (4) are all provided with external pressure equalizing pipelines, and the three external pressure equalizing pipelines are connected to the stamping main pipeline (6) through compressed air ducts, and each compressed air duct is provided with a manual shut-off valve and a pneumatic pressure equalizing valve.

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