Stepping device of heating furnace

Abstract

The utility model relates to a heating furnace stepping device which is used for improving the connection mode of a movable water beam and an external fixed water pipe. The device comprises a lower header assembly, a flexible assembly and an upper header assembly, and the flexible assembly is composed of an L-shaped bent pipe, a ball rotating connector, a stop valve and the like so as to adapt to movement of a movable water beam. The stepping device is simple in structure, convenient to install, capable of effectively reducing occupied space, improving motion precision and prolonging service life, suitable for various hot rolling heating furnaces and capable of optimizing layout of a pipeline system.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating furnace equipment and relates to a stepping device for a heating furnace. Background Art

[0002] Walking beam hot rolling heating furnace usually uses water beam to support steel billets. Water beams include fixed water beams and movable water beams. The fixed water beams are stationary, while the movable water beams periodically perform four actions of "vertical rise - horizontal advance - vertical descent - horizontal retreat" driven by the furnace bottom machinery. Therefore, a device is needed to realize the connection between the movable water beam and the external fixed water pipe to ensure that the movable water beam can be continuously supplied with water.

[0003] Currently, there are two common connection devices between the movable water beam and the external fixed water pipe: a metal hose and a ball rotating joint assembly.

[0004] Among them, the metal hose is composed of a stainless steel bellows and an outer protective mesh sleeve. It has strong flexibility and poor pulse impact resistance. It is generally only used to transport single-phase fluid media. At present, the walking beam hot rolling heating furnace with water cooling often uses a metal hose as a connecting device between the movable water beam and the external fixed water pipe, that is, one end of the metal hose is connected to the moving movable water beam water supply pipe (or return pipe), and the other end is connected to the external fixed water pipe. In addition to the limited phase state of the conveying medium, the metal hose also has the following disadvantages: First, the heating furnace step trajectory requirements and the metal hose bending radius restrictions, etc., the length of the metal hose is very long, generally more than 3m, and the space occupied is relatively large. Secondly, there are low points in the metal hose, but it cannot be drained, and slag is easy to accumulate inside it. Thirdly, the service life of the metal hose is short and it needs to be replaced almost every year. Finally, the replacement of the metal hose requires the cooperation of multiple people, and the replacement is difficult.

[0005] The ball rotating joint assembly is commonly used in the walking beam hot rolling heating furnace using vaporization cooling. The ball rotating joint assembly is composed of three ball rotating joints and several straight pipes, elbows, etc. connected in series. Its upper and lower ends are respectively connected to the upper header of the movable water beam water supply (or return water) and the fixed lower header. The entire ball rotating joint assembly is hung on the walking beam upper header through a spring hanger. The axial centerline of the three ball rotating joints is perpendicular to the centerline of the upper header and the lower header. The existing ball rotating joint assembly has some disadvantages in production, arrangement, installation, performance and service life due to its structural reasons: first, the structure of the ball rotating joint assembly is complex, the material is more, and the production is time-consuming and labor-intensive; second, the ball rotating joint assembly is large in size and has a long cantilever, and is usually arranged on both sides of the heating furnace, and the furnace bottom mechanical lifting cylinder and hydraulic valve station and other equipment are arranged on both sides of the heating furnace, so the arrangement space of the ball rotating joint assembly is very limited, which is not convenient for the operation and maintenance of the ball rotating joint assembly and the nearby furnace bottom mechanical lifting cylinder and hydraulic valve station; third, the ball rotating joint assembly is arranged on both sides of the heating furnace, far away from the heating furnace translation frame, resulting in the upper header of the movable water beam water supply (or return water) cannot be directly rooted on the heating furnace translation frame, so a large amount of steel is required as an installation bracket, and the installation engineering is large. Fourth, the ball rotating joint assembly is arranged on both sides of the heating furnace, resulting in a large number of water pipes under the heating furnace, which is also one of the main reasons why the walking beam hot rolling heating furnace using water cooling does not use the ball rotating joint assembly as a connecting device between the movable water beam and the external fixed water pipe. Fifth, the ball rotating joint assembly has many elbows, the fluid flow resistance is large, and the impact force of the fluid on the ball rotating joint is large, which affects the service life of the ball rotating joint assembly. Utility Model Content

[0006] In view of this, the purpose of the present invention is to solve the above problems and provide a stepping device for a heating furnace.

[0007] In order to achieve the above object, the utility model provides the following technical solutions:

[0008] A heating furnace stepping device comprises a lower header assembly, a flexible assembly, and an upper header assembly connected in sequence; the lower header assembly is fixedly arranged on a civil engineering foundation and connected to cooling water, the upper header assembly is connected to a movable water beam, and cooling water enters the movable water beam through the lower header assembly, the flexible assembly, and the upper header assembly, or flows out from the movable water beam through the upper header assembly, the flexible assembly, and the lower header assembly; the upper header assembly is arranged on a translation frame beam on the movable water beam, and moves synchronously with the movable water beam;

[0009] The flexible assembly includes an L-shaped elbow A, a spherical rotating joint A, an S-shaped elbow, a spherical rotating joint B, a U-shaped elbow, a spherical rotating joint C, an L-shaped elbow B, and a spring hanger which are connected in series in sequence; the L-shaped elbow A is connected to the upper header assembly, and the L-shaped elbow B is connected to the lower header assembly;

[0010] The upper header assembly and the lower header assembly are respectively provided with a positioning plate A and a positioning plate B, and the ball rotating joint A and the ball rotating joint C are respectively fixedly connected to the upper header assembly and the lower header assembly through the positioning plate A and the positioning plate B; one end of the spring hanger is connected to the positioning plate A, and the other end is connected to one end of the S-shaped elbow close to the lower header assembly;

[0011] When the movable water beam moves, the flexible component rotates through the ball rotating joint A, the ball rotating joint B and the ball rotating joint C to adapt to the position change between the upper header assembly and the lower header assembly.

[0012] Furthermore, the L-shaped elbow A and the L-shaped elbow B are both provided with a cut-off valve.

[0013] Furthermore, a guide device A and a guide device B are respectively provided at both ends of the U-shaped bend pipe. The ball rotating joint C is rotatably arranged on the guide device A and is axially limited by the guide device A. The ball rotating joint B is rotatably arranged on the guide device B and is axially limited by the guide device B.

[0014] Furthermore, one or a plurality of the flexible components are arranged side by side between the upper header assembly and the lower header assembly.

[0015] Furthermore, the upper header assembly includes an upper header, an upper fixed bracket, and an upper guide bracket; the upper header is a steel pipe, arranged horizontally, and the upper header is provided with one or more movable water beam water pipe interfaces for connecting with the movable water beam, and the L-shaped elbow A is connected to the upper header;

[0016] The upper fixed bracket and the upper guide bracket are fixedly arranged on the upper part of the upper header, and are connected with the translation frame beam through bolts.

[0017] The movable water beam water pipe interface can be arranged above, below, on the side or at the end of the upper header as required.

[0018] Furthermore, both ends of the upper header are provided with openable and closable inspection hand holes, and an upper header exhaust port is provided above the upper header.

[0019] Furthermore, the lower header assembly includes a lower header, a lower fixed support, and a lower guide support; the lower header is a steel pipe, arranged horizontally, and the L-shaped elbow B is connected to the lower header; an external water pipe interface is provided at one end of the lower header, and an openable and closable maintenance hand hole is provided at the other end, or maintenance hand holes are provided at both ends of the lower header, and a cooling water interface is provided in the middle; the lower fixed support and the lower guide support are fixedly arranged on the upper part of the upper header, and are fixed to the civil foundation by bolts.

[0020] Furthermore, the lower header is also provided with a sewage outlet.

[0021] Furthermore, the spring hanger includes a spring and a pull rod; both ends of the spring are connected to the pull rod, and the two pull rods are hinged to the positioning plate A and the S-shaped bend pipe respectively.

[0022] Furthermore, the flexible component is provided with an exhaust port.

[0023] The stepping device in the utility model can be used for both vaporization cooling heating furnace and water cooling heating furnace. When used for water cooling heating furnace, it can be installed near the charging end or the discharging end of the furnace bottom of the heating furnace, and the pipeline system is clear and the amount of pipeline material is small. When used for vaporization cooling heating furnace, the stepping device can be installed on the floor near the double columns of the movable water beam, so that the pipeline system at the bottom of the heating furnace is more neat and beautiful.

[0024] The beneficial effects of the utility model are:

[0025] 1) The stepping device in the utility model is assembled by an upper header, a lower header and several groups of flexible components. The upper header and the lower header are made of ordinary materials, the flexible components are simple in structure, and the equipment is easy to manufacture and repair. The flexible components are provided with positioning plates, guide devices, spring hangers and other components to fix or limit the movement trajectory, the flow channel is smooth, the resistance is small, it is safe and reliable, and the service life is long.

[0026] 2) The stepping device in the utility model has a longer service life than the metal hose and occupies less space. The upper header can be directly installed on the translation frame beam of the furnace bottom of the heating furnace. The stepping device has a compact structure, flexible telescopic, small space occupation, and is easy to transport and install. It can be arranged at any position of the furnace bottom without occupying the narrow sides of the furnace bottom, freeing up space for inspection and maintenance of equipment such as the furnace bottom machinery and hydraulic valve station.

[0027] 3) The stepping device in the utility model has a sewage outlet disposed in the lower header, so that slag is not easily accumulated inside the device.

[0028] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0030] Figure 1 It is a structural schematic diagram of the stepping device of the heating furnace of the utility model.

[0031] Figure markings: 1.1-upper fixed bracket; 1.2-upper guide bracket; 1.3-upper header inspection hand hole; 1.4-movable water beam water pipe interface; 2.1-lower fixed support; 2.2-lower guide support; 2.3-lower header inspection hand hole; 2.4-external water pipe interface; 2.5-lower header sewage outlet; 3.1-spherical rotating joint A; 3.2-spherical rotating joint B; 3.3-spherical rotating joint C; 3.4-S-shaped bend; 3.5-U-shaped bend; 3.6-L-shaped bend A; 3.7-L-shaped bend B; 3.8-shut-off valve A; 3.9-shut-off valve B; 3.10-spring hanger; 3.11-positioning plate A; 3.12-positioning plate B; 3.13-guide device A; 3.14-guide device B; 3.15-flexible component exhaust port. DETAILED DESCRIPTION

[0032] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0033] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0034] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] See also Figure 1 , which is a heating furnace stepping device, comprising a lower header assembly, a flexible assembly, and an upper header assembly connected in sequence; the lower header assembly is fixedly installed on the civil engineering foundation and connected to cooling water, the upper header assembly is connected to the movable water beam, and the cooling water enters the movable water beam through the lower header assembly, the flexible assembly, and the upper header assembly, or flows out from the movable water beam through the upper header assembly, the flexible assembly, and the lower header assembly; the upper header assembly is installed on the translation frame beam on the movable water beam and moves synchronously with the movable water beam;

[0036] The flexible component includes an L-shaped bend A3.6, a ball rotating joint A3.1, an S-shaped bend 3.4, a ball rotating joint B3.2, a U-shaped bend 3.5, a ball rotating joint C3.3, an L-shaped bend B3.7, and a spring hanger 3.10 which are connected in series in sequence; the L-shaped bend A3.6 is connected to the upper header assembly, and the L-shaped bend B3.7 is connected to the lower header assembly.

[0037] When the movable water beam moves, the flexible component rotates through the ball rotating joint A3.1, the ball rotating joint B3.2 and the ball rotating joint C3.3 to adapt to the position change between the upper header assembly and the lower header assembly.

[0038] The upper header is made of ordinary carbon steel pipe, and is provided with an upper fixed bracket 1.1, two upper guide brackets 1.2, two upper header inspection hand holes 1.3, four movable water beam water pipe interfaces 1.4, and an upper header exhaust port. The upper fixed bracket 1.1 has four circular bolt holes, and the upper guide bracket 1.2 has four waist-shaped holes. When the stepping device is installed, it can be connected to the translation frame beam or the steel section extending from the translation frame beam by bolts. The two upper header inspection hand holes 1.3 are located at both ends of the upper header. The four movable water beam water pipe interfaces 1.4 and the upper header exhaust port are all arranged above the upper header.

[0039] The lower header is located below the upper header. It is made of the same material as the upper header. It is provided with a lower fixed support 2.1, two lower guide supports 2.2, a lower header inspection hand hole 2.3, an external water pipe interface 2.4, a lower header sewage outlet 2.5, etc. The lower fixed support 2.1 is provided with 4 circular bolt holes, and the lower guide support 2.2 is provided with 4 waist-shaped holes. When the stepping device is installed, the lower fixed support 2.1 and the lower guide support 2.2 can be connected to the civil foundation of the furnace bottom through anchor bolts. The lower header inspection hand hole 2.3 and the external water pipe interface 2.4 are respectively located at the two ends of the lower header. The lower header sewage outlet 2.5 is located at the bottom of the lower header.

[0040] There are four flexible components between the upper header and the lower header, and the flexible components are arranged parallel to each other. Each flexible component includes three ball rotating joints: ball rotating joint A3.1, ball rotating joint B3.2 and ball rotating joint C3.3, two L-shaped elbows: L-shaped elbow A3.6 and L-shaped elbow B3.7, two shut-off valves: shut-off valve A3.8 and shut-off valve B3.9, one S-shaped elbow 3.4, one U-shaped elbow 3.5, one spring hanger 3.10, two positioning plates: positioning plate A3.11 and positioning plate B3.12, two guide devices: guide device A3.13 and guide device B3.14, and a spring hanger 3.10. The ball rotating joint A3.1, the ball rotating joint B3.2 and the ball rotating joint C3.3 are arranged in an L shape from top to bottom, and are connected by an S-shaped elbow 3.4 and a U-shaped elbow 3.5. The ball rotating joint A3.1 and the ball rotating joint C3.3 are connected to the upper header and the lower header respectively by an L-shaped elbow A3.6 and an L-shaped elbow B3.7. A shut-off valve A3.8 and a flexible component exhaust port 3.15 are provided on the L-shaped elbow A3.6, and a shut-off valve B3.9 is provided on the L-shaped elbow B3.7.

[0041] The guide device is composed of rolling bearings, steel plates, steel pipes, etc., and is used to limit the axial movement of the ball rotating joint.

[0042] The spherical rotating joint A3.1 and the spherical rotating joint C3.3 are fixed at one end by the positioning plate A3.11 and the positioning plate B3.12 respectively, and the spherical rotating joint B3.2 and the spherical rotating joint C3.3 are axially limited by the guide device A3.13 and the guide device B3.14 with rolling bearings respectively, and the S-shaped bend A3.4 is provided with a spring hanger 3.10 hung on the positioning plate A3.11. The spring hanger 3.10 includes a spring and a pull rod; both ends of the spring are connected with a pull rod, and the two pull rods are respectively hinged with the positioning plate A3.11 and the S-shaped bend 3.4.

[0043] When the components such as the ball rotating joint in the flexible component need to be repaired or replaced, it is only necessary to close the cut-off valve A3.8 and the cut-off valve B3.9 on this group of flexible components and open the valve on the flexible component exhaust port 3.15 (not shown in the figure), and the heating furnace does not stop during the whole process.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A heating furnace stepping device, characterized in that: It comprises a lower header assembly, a flexible assembly and an upper header assembly which are connected in sequence; the lower header assembly is fixedly arranged on the civil engineering foundation and connected to the cooling water, the upper header assembly is connected to the movable water beam, and the cooling water enters the movable water beam through the lower header assembly, the flexible assembly and the upper header assembly or flows out from the movable water beam through the upper header assembly, the flexible assembly and the lower header assembly; the upper header assembly is arranged on the translation frame beam on the movable water beam and moves synchronously with the movable water beam; The flexible assembly includes an L-shaped elbow A, a spherical rotating joint A, an S-shaped elbow, a spherical rotating joint B, a U-shaped elbow, a spherical rotating joint C, an L-shaped elbow B, and a spring hanger which are connected in series in sequence; the L-shaped elbow A is connected to the upper header assembly, and the L-shaped elbow B is connected to the lower header assembly; The upper header assembly and the lower header assembly are respectively provided with a positioning plate A and a positioning plate B, and the ball rotating joint A and the ball rotating joint C are respectively fixedly connected to the upper header assembly and the lower header assembly through the positioning plate A and the positioning plate B; one end of the spring hanger is connected to the positioning plate A, and the other end is connected to one end of the S-shaped elbow close to the lower header assembly; When the movable water beam moves, the flexible component rotates through the ball rotating joint A, the ball rotating joint B and the ball rotating joint C to adapt to the position change between the upper header assembly and the lower header assembly.

2. The heating furnace stepping device according to claim 1, characterized in that: The L-shaped elbow A and the L-shaped elbow B are both provided with a cut-off valve.

3. The heating furnace stepping device according to claim 1, characterized in that: The two ends of the U-shaped bend are respectively provided with a guide device A and a guide device B. The ball rotating joint C is rotatably arranged on the guide device A and is axially limited by the guide device A. The ball rotating joint B is rotatably arranged on the guide device B and is axially limited by the guide device B.

4. The heating furnace stepping device according to claim 1, characterized in that: One or a plurality of the flexible components are arranged side by side between the upper header component and the lower header component.

5. The heating furnace stepping device according to claim 1, characterized in that: The upper header assembly comprises an upper header, an upper fixed bracket, and an upper guide bracket; the upper header is a steel pipe, arranged horizontally, and the upper header is provided with one or more movable water beam water pipe interfaces for connecting with the movable water beam, and the L-shaped elbow A is connected to the upper header; The upper fixed bracket and the upper guide bracket are fixedly arranged on the upper part of the upper header, and are connected with the translation frame beam through bolts.

6. The heating furnace stepping device according to claim 5, characterized in that: Both ends of the upper header are provided with openable and closable inspection hand holes, and an upper header exhaust port is provided above the upper header.

7. The heating furnace stepping device according to claim 1, characterized in that: The lower header assembly includes a lower header, a lower fixed support, and a lower guide support; the lower header is a steel pipe, arranged horizontally, and the L-shaped elbow B is connected to the lower header; an external water pipe interface is provided at one end of the lower header, and an openable and closable maintenance hand hole is provided at the other end, or maintenance hand holes are provided at both ends of the lower header, and a cooling water interface is provided in the middle; the lower fixed support and the lower guide support are fixedly arranged on the upper part of the upper header, and are fixed to the civil foundation by bolts.

8. The heating furnace stepping device according to claim 7, characterized in that: The lower header is also provided with a sewage outlet.

9. The heating furnace stepping device according to claim 1, characterized in that: The spring hanger comprises a spring and a pull rod; both ends of the spring are connected with the pull rod, and the two pull rods are hinged to the positioning plate A and the S-shaped bent pipe respectively.

10. The heating furnace stepping device according to claim 1, characterized in that: The flexible component is provided with an exhaust port.

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