Emergency protection device for end-in and side-out heat storage pusher-type heating furnace

Abstract

An emergency protection device for an end-in and side-out heat storage steel pushing type heating furnace comprises a push rod movably arranged on a furnace door in a penetrating mode, the push rod is parallel to the steel feeding direction of the heating furnace, and one end of the push rod extends into the heating furnace, then is close to the steel discharging position of the heating furnace and faces the steel feeding direction of the heating furnace. The other end of the push rod is fixedly provided with a position sensing module used for sensing the position of the push rod, and the position sensing module is electrically connected with a controller of the heating furnace. Once steel billets in the heating furnace are clamped in the steel tapping groove and cannot be tapped, the steel billets extrude the push rod to move out of the heating furnace, the push rod drives the position sensing module to move together, the position sensing module transmits signals to the controller, the controller controls the hydraulic pump motor to immediately turn off the power supply, and the steel tapping machine pushes the redundant steel billets out of the heating furnace.

Description

Technical Field

[0001] The utility model relates to the technical field of steelmaking heating furnace equipment, and particularly relates to an emergency protection device for an end-inlet side-outlet regenerative pusher-type heating furnace. Background Technique

[0002] In an end-inlet side-outlet regenerative pusher-type heating furnace, there are generally equipment such as a pusher and a billet discharger to complete the operations of feeding and discharging billets. Four billets are fed per lift in this heating furnace. After the billets are transported from the steelmaking roller table to the charging roller table by the steelmaking roller table, the pusher pushes the billets into the heating furnace from the end of the heating furnace. The billets are arranged in a certain layout in the furnace. The billet discharger uses the power rod to push the billets on the billet discharge chute out of the heating furnace one by one according to the frequency of the steel demand signal of the rolling line. While the billet discharger retreats, the rolling mill bites the billet, and the system automatically gives a steel demand signal to the pusher. At this time, the pusher pushes one billet, and the billet discharging operation circulates throughout the shift. However, once equipment failures occur during the production process, such as hydraulic failures, solenoid valve failures, problems with the length and skew of the billets, and misjudgment of images, if the previous billet fails to be pushed out of the billet discharge chute and the next billet enters the billet discharge chute, it will cause blockage, resulting in the billet being clamped in the billet discharge chute and unable to be discharged, affecting production. Content of the Utility Model

[0003] In order to solve the problem that the billet cannot be discharged due to being clamped in the billet discharge chute in the prior art, the utility model provides an emergency protection device for an end-inlet side-outlet regenerative pusher-type heating furnace. Once the billet is clamped in the billet discharge chute and cannot be discharged, the position sensing module can transmit a signal to the controller, and the controller controls the hydraulic pump motor to immediately cut off the power supply, and the billet discharger pushes the redundant billets out of the heating furnace.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: an emergency protection device for an end-inlet side-outlet regenerative pusher-type heating furnace, including a push rod movably penetrating through the furnace door, and the push rod is parallel to the billet feeding direction of the heating furnace. One end of the push rod extends into the heating furnace and is close to the billet discharging position of the heating furnace and faces the billet feeding direction of the heating furnace. A position sensing module for sensing the position of the push rod is fixedly arranged at the other end of the push rod, and the position sensing module is electrically connected to the controller of the heating furnace.

[0005] As a further optimization of the emergency protection device for an end-inlet side-outlet regenerative pusher-type heating furnace of the utility model: an installation sleeve is fixedly penetrated through the furnace door, the installation sleeve is communicated with the inside of the heating furnace, and the push rod movably penetrates through the installation sleeve.

[0006] As a further optimization of an emergency protection device for an end-inlet and side-outlet regenerative pusher-type reheating furnace in the utility model: the installation sleeve is fixedly connected with a positioning flange, and the push rod can pass through the positioning flange during its movement. A retaining ring is fixedly arranged on the push rod, the retaining ring is located outside the installation sleeve, and a spring is arranged between the retaining ring and the positioning flange, and the spring is sleeved on the push rod.

[0007] As a further optimization of an emergency protection device for an end-inlet and side-outlet regenerative pusher-type reheating furnace in the utility model: a first connecting flange is fixedly arranged on the installation sleeve, the first connecting flange is connected with a second connecting flange through a plurality of connecting screws, the second connecting flange is connected with the positioning flange through a protective sleeve, the spring is located in the protective sleeve, the retaining ring is located between the second connecting flange and the positioning flange, and the retaining ring is located in the protective sleeve.

[0008] As a further optimization of an emergency protection device for an end-inlet and side-outlet regenerative pusher-type reheating furnace in the utility model: an elastic retaining ring is fixedly arranged on the push rod, and the elastic retaining ring is located between the second connecting flange and the retaining ring.

[0009] As a further optimization of an emergency protection device for an end-inlet and side-outlet regenerative pusher-type reheating furnace in the utility model: a heat insulation layer is fixedly arranged on the inner wall of one end of the installation sleeve located outside the furnace door.

[0010] As a further optimization of an emergency protection device for an end-inlet and side-outlet regenerative pusher-type reheating furnace in the utility model: an installation flange is fixedly sleeved on one end of the push rod extending out of the reheating furnace, and the position sensing module is fixedly arranged on the installation flange through an installation plate.

[0011] As a further optimization of an emergency protection device for an end-inlet and side-outlet regenerative pusher-type reheating furnace in the utility model: the push rod is of a hollow structure, and a water delivery pipe is communicated with the inner cavity of the push rod. The water inlet end of the water delivery pipe is connected with a water inlet hose, the water outlet end of the water delivery pipe extends into the push rod, and a cooling water cavity is formed between the outer wall of the water delivery pipe and the inner wall of the push rod. The cooling water cavity is communicated with a return water hose.

[0012] As a further optimization of an emergency protection device for an end-inlet and side-outlet regenerative pusher-type reheating furnace in the utility model: one end of the push rod extending into the reheating furnace is arranged in a conical shape.

[0013] Beneficial effects: The utility model includes a push rod movably inserted through the furnace door, and the push rod is parallel to the steel feeding direction of the heating furnace. One end of the push rod extends into the heating furnace and is close to the steel discharging position of the heating furnace and faces the steel feeding direction of the heating furnace. A position sensing module for sensing the position of the push rod is fixedly arranged at the other end of the push rod, and the position sensing module is electrically connected to the controller of the heating furnace. Once the steel billet in the heating furnace is clamped in the steel discharging groove and cannot be discharged, the steel billet will squeeze the push rod to move out of the heating furnace, and the push rod will drive the position sensing module to move together. At this time, the position sensing module transmits a signal to the controller, and the controller controls the hydraulic pump motor to immediately cut off the power supply, and the steel discharging machine pushes the excess steel billet out of the heating furnace. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the utility model;

[0015] Figure 2 is an enlarged view of the utility model;

[0016] Reference numerals in the drawings: 1. Push rod, 2. Furnace door, 3. First connecting flange, 4. First fixing flange, 5. Water inlet hose, 6. Position sensing module, 7. Guide round bar, 8. Second connecting flange, 9. Connecting screw, 10. Connecting nut, 11. Heat insulation layer, 12. Elastic retaining ring, 13. Retaining ring, 14. Protection sleeve, 15. Spring, 16. Second fixing flange, 17. Positioning flange, 18. Return water hose, 19. Installation flange, 20. Third fixing flange, 21. Water delivery pipe, 22. Installation sleeve. Detailed Description of the Invention

[0017] The following further elaborates on the technical solution of the utility model in combination with specific embodiments. For parts that are not detailedly described and disclosed in the following embodiments of the utility model, they should all be understood as the prior art known or should be known to those skilled in the art, such as the specific structure and working principle of the end-feed side-discharge regenerative pusher-type heating furnace, etc.

[0018] Embodiment 1

[0019] An emergency protection device for an end-feed side-discharge regenerative pusher-type heating furnace, as Figure 1 and Figure 2As shown in the figure, it includes a push rod 1 movably arranged on the furnace door 2, and the push rod 1 is parallel to the steel feeding direction of the heating furnace. One end of the push rod 1 extends into the heating furnace and is close to the steel discharging position of the heating furnace and faces the steel feeding direction of the heating furnace. The distance between the end of the push rod 1 extending into the heating furnace and the side of the billet is 100 mm, the width of the billet is 165 mm, and the end of the push rod 1 extending into the heating furnace is set to be conical. When equipment failures such as the steel image recognition system and the pusher occur, the number of billets will increase. At this time, the billets will push against the end of the push rod 1 extending into the heating furnace, causing the push rod 1 to move backward. A position sensing module 6 for sensing the position of the push rod 1 is fixedly arranged at the other end of the push rod 1, and the position sensing module 6 is electrically connected to the controller of the heating furnace. At this time, the controller controls the hydraulic pump motor to immediately cut off the power supply, and the billet discharging machine pushes the excess billets out of the heating furnace. How the position sensing module 6 is electrically connected to the controller of the heating furnace and how the controller controls the hydraulic pump motor are all conventional prior arts in this field and will not be elaborated here. The position sensing module 6 can be a ranging switch, which judges whether to send a signal to the controller by measuring the distance from the furnace door 2; the position sensing module 6 can also be a proximity switch. A contact cooperating with the proximity switch is installed near the heating furnace. When the push rod 1 moves to drive the proximity switch to contact the contact, the proximity switch sends a signal to the controller. The ranging switch and the proximity switch are both conventional technologies in this field and will not be elaborated here.

[0020] The above is the basic implementation mode of the present invention. Further improvements, optimizations and limitations can be made on this basis to obtain the following embodiments:

[0021] Embodiment 2

[0022] This embodiment is an improved scheme based on Embodiment 1. Its main structure is the same as that of Embodiment 1. The improvement lies in that: an installation sleeve 22 is fixedly arranged on the furnace door 2, the installation sleeve 22 is communicated with the inside of the heating furnace, and the push rod 1 is movably arranged in the installation sleeve 22 to ensure that the push rod 1 moves more smoothly without tilting.

[0023] Embodiment 3

[0024] This embodiment is an improved solution based on Embodiment 2. Its main structure is the same as that of Embodiment 2. The improvement lies in that the mounting sleeve 22 is fixedly connected with the positioning flange 17, and the push rod 1 can pass through the positioning flange 17 during its movement. The push rod 1 moves within the mounting sleeve 22 and the positioning flange 17, making the movement of the push rod 1 more stable. A retaining ring 13 is fixedly arranged on the push rod 1. The retaining ring 13 is located outside the mounting sleeve 22. A spring 15 is arranged between the retaining ring 13 and the positioning flange 17, and the spring 15 is sleeved on the push rod 1. In this way, when the push rod 1 moves outward towards the furnace door 2, the spring 15 is compressed. When the billet in the heating furnace normally enters and exits, the billet will not abut against the push rod 1, and the spring 15 can release to push the push rod 1 into the heating furnace to maintain the initial state. The retaining ring 13 plays a limiting role to prevent the push rod 1 from entering the heating furnace too much.

[0025] Embodiment 4

[0026] This embodiment is an improved solution based on Embodiment 3. Its main structure is the same as that of Embodiment 3. The improvement lies in that a first connecting flange 3 is fixedly arranged on the mounting sleeve 22. The first connecting flange 3 is connected with a first fixing flange 4 by bolts. The first connecting flange 3 is sleeved on the mounting sleeve 22, and the first fixing flange 4 is in contact with the end of the mounting sleeve 22. The push rod 1 can pass through the first fixing flange 4 when moving. The first connecting flange 3 is connected with a second connecting flange 8 by a plurality of connecting screws 9, and the connecting screws 9 are further fastened by connecting nuts 10. The distance between the first connecting flange 3 and the second connecting flange 8 can be adjusted. The second connecting flange 8 is connected with the positioning flange 17 through a protective sleeve 14. The surface of the positioning flange 17 facing the protective sleeve 14 is connected with a second fixing flange 16 by bolts. The second fixing flange 16 is sleeved on the protective sleeve 14. The spring 15 is located inside the protective sleeve 14, and the retaining ring 13 is located between the second connecting flange 8 and the positioning flange 17 and is inside the protective sleeve 14. The actual production environment is complex, and the protective sleeve 14 can protect the spring 15. A guiding round bar 7 is also penetrated through the positioning flange 17 to play a guiding role.

[0027] Embodiment 5

[0028] This embodiment is an improved solution based on Embodiment 4. Its main structure is the same as that of Embodiment 4. The improvement lies in that an elastic retaining ring 12 is fixedly arranged on the push rod 1. The elastic retaining ring 12 is located between the second connecting flange 8 and the retaining ring 13. When the spring 15 pushes the retaining ring 13 towards the heating furnace, the elastic retaining ring 12 can play a buffering role.

[0029] Embodiment 6

[0030] This embodiment is an improved solution based on Embodiment 1. Its main structure is the same as that of Embodiment 1. The improvement lies in that: one end of the push rod 1 extending out of the heating furnace is fixedly sleeved with a mounting flange 19. The mounting flange 19 is bolted to a third fixed flange 20. The third fixed flange 20 is fixedly sleeved on the push rod 1. When the push rod 1 moves, the mounting flange 19 and the third fixed flange 20 move together therewith. The position sensing module 6 is fixedly arranged on the mounting flange 19 through a mounting plate.

[0031] Embodiment 7

[0032] This embodiment is an improved solution based on Embodiment 1. Its main structure is the same as that of Embodiment 1. The improvement lies in that: the push rod 1 is of a hollow structure, and the inner cavity of the push rod 1 communicates with a water delivery pipe 21. The water inlet end of the water delivery pipe 21 is connected with a water inlet hose 5. The water outlet end of the water delivery pipe 21 extends into the push rod 1, and a cooling water cavity is formed between the outer wall of the water delivery pipe 21 and the inner wall of the push rod 1. The cooling water cavity communicates with a return water hose 18. Since the temperature inside the heating furnace is relatively high, the temperature of the push rod 1 will be too high. Cool water is introduced into the water inlet hose 5. After the cool water enters the water delivery pipe 21, it flows into the cooling water cavity of the push rod 1, and then flows out through the return water hose 18 to cool the push rod 1 by water cooling. A heat insulation layer 11 is fixedly arranged on the inner wall of one end of the mounting sleeve 22 located outside the furnace door 2.

[0033] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An emergency protection device for an end-in and side-out regenerative pusher-type reheating furnace, characterized in that: It includes a push rod (1) movably arranged on the furnace door (2), and the push rod (1) is parallel to the steel feeding direction of the heating furnace. One end of the push rod (1) extends into the heating furnace and is close to the steel discharging position of the heating furnace and faces the steel feeding direction of the heating furnace. A position sensing module (6) for sensing the position of the push rod (1) is fixedly arranged at the other end of the push rod (1), and the position sensing module (6) is electrically connected to the controller of the heating furnace.

2. The emergency protection device for the end-inlet and side-outlet regenerative pusher-type reheating furnace according to claim 1, wherein: An installation sleeve (22) is fixedly arranged on the furnace door (2), the installation sleeve (22) communicates with the inside of the heating furnace, and the push rod (1) movably passes through the installation sleeve (22).

3. The emergency protection device for the end-in and side-out regenerative pusher-type reheating furnace according to claim 2, characterized in that: The installation sleeve (22) is fixedly connected with a positioning flange (17), and the push rod (1) can pass through the positioning flange (17) during the moving process. A retaining ring (13) is fixedly arranged on the push rod (1), the retaining ring (13) is located outside the installation sleeve (22), and a spring (15) is arranged between the retaining ring (13) and the positioning flange (17), and the spring (15) is sleeved on the push rod (1).

4. The emergency protection device for the end-in and side-out regenerative pusher-type reheating furnace according to claim 3, characterized in that: A first connecting flange (3) is fixedly arranged on the installation sleeve (22), the first connecting flange (3) is connected with a second connecting flange (8) through a plurality of connecting screws (9), the second connecting flange (8) is connected with the positioning flange (17) through a protective sleeve (14), the spring (15) is located in the protective sleeve (14), the retaining ring (13) is located between the second connecting flange (8) and the positioning flange (17), and the retaining ring (13) is located in the protective sleeve (14).

5. The emergency protection device for the end-feed and side-discharge regenerative pusher-type reheating furnace according to claim 4, characterized in that: An elastic retaining ring (12) is fixedly arranged on the push rod (1), and the elastic retaining ring (12) is located between the second connecting flange (8) and the retaining ring (13).

6. The emergency protection device for the end-in and side-out regenerative pusher-type reheating furnace according to claim 2, characterized in that: A heat preservation layer (11) is fixedly arranged on the inner wall of one end of the installation sleeve (22) located outside the furnace door (2).

7. The emergency protection device for the end-in and side-out regenerative pusher-type reheating furnace according to claim 1, wherein: An installation flange (19) is fixedly sleeved at one end of the push rod (1) extending out of the heating furnace, and the position sensing module (6) is fixedly arranged on the installation flange (19) through an installation plate.

8. The emergency protection device for the end-feed side-discharge regenerative pusher-type reheating furnace according to claim 1, characterized in that: The push rod (1) is of a hollow structure, and a water delivery pipe (21) communicates with the inner cavity of the push rod (1). The water inlet end of the water delivery pipe (21) is connected with a water inlet hose (5), the water outlet end of the water delivery pipe (21) extends into the push rod (1), and a cooling water cavity is formed between the outer wall of the water delivery pipe (21) and the inner wall of the push rod (1), and the cooling water cavity communicates with a return water hose (18).

9. The emergency protection device for the end-in and side-out regenerative pusher-type reheating furnace according to claim 8, characterized in that: One end of the push rod (1) extending into the heating furnace is set to be conical.

Images