A pusher bar device for a pusher furnace

Abstract

The utility model relates to the field of pusher type heating furnace pusher. A pull rod device of pusher type heating furnace, including pin shaft block (8) and horizontal pull rod, pin shaft block (8) is welded in the elbow place of water beam (1) of the billet import end of pusher type heating furnace, both ends of horizontal pull rod are connected pin shaft block (8) and fixed point respectively, and the fixed point is the fulcrum fixed on the ground outside pusher type heating furnace, and pin shaft block (8) is fixedly connected with horizontal pull rod through pin shaft. The horizontal pull rod adjustment end (locking device position) of the utility model is away from the high temperature area of heating furnace, and the tension adjustment and spot inspection maintenance are convenient, the utility model improves the field operation environment, reduces the labor intensity of staff, the horizontal pull rod of the utility model is away from the high temperature baking area, reduces the corrosion, the deformation aging, prolongs the service life.

Description

Technical Field

[0001] This utility model relates to the field of pushing steel in a pusher-type heating furnace. Background Technology

[0002] The pusher-type continuous heating furnace (pusher-type heating furnace) is an important industrial piece of equipment in the rolling mill field. Its core feature is the use of a pusher to achieve continuous movement of the billet within the furnace. The water beam (or furnace rib tube) is a crucial skeletal support structure inside the pusher-type heating furnace, bearing the entire weight of the steel billet inside. A high-temperature, wear-resistant sliding block is fixed directly above the tube wall, and water circulates inside for cooling. Several water beams are arranged inside the pusher-type heating furnace according to the width of the furnace body. The steel billet is pushed into the furnace by the pusher on the furnace feed roller conveyor, with each push stroke being the width of one billet. During the pushing process, the water beams are prone to vibration due to friction and thermal expansion and contraction. This vibration can lead to cracking of the water beam welds, detachment of the insulation layer, and other issues, affecting the safe operation of the heating furnace.

[0003] To prevent vibration, a diagonal bracing device is installed at the end of the furnace body (the inlet end), such as... Figure 3 As shown, its purpose is (1) the diagonal tie rod can effectively tighten the water beam by connecting the water beam and the furnace external fixing device (fixed point), so as to avoid the vibration caused by friction and thermal expansion and contraction during the pushing of steel (vibration may cause cracking of the water beam weld, detachment of the insulation layer, etc.), affecting the safe operation of the heating furnace; (2) the water beam will lengthen or shorten due to thermal expansion and contraction in the high temperature environment, and the diagonal tie rod can absorb this expansion and contraction change to keep the water beam stable; (3) the diagonal tie rod can significantly reduce the vibration amplitude of the water beam, avoid the slide block falling off and the insulation layer being damaged, thereby extending the service life of the water beam and improving the overall stability of the equipment.

[0004] However, tie rods have the following drawbacks during use: (1) The diagonal tie rod has a high adjustment frequency, and the operator needs to be close to the heating furnace body during operation. The temperature is high, and the labor intensity of the employees is relatively high. (2) The diagonal tie rod is located below the steel billet. Before adjustment, the steel billet above the diagonal tie rod must be lifted away, which increases the difficulty of operation and affects the timeliness of adjustment; (3) The tie rod is prone to corrosion or jamming in high temperature and high humidity environments, making adjustment difficult; (4) The foundation of the pre-embedded part at the fixed end of the tie rod may settle or deform due to long-term heat or load, affecting the stability of the tie rod.

[0005] (5) The narrow distance between the tie rod and the furnace body and the harsh environment (high temperature) increase the difficulty of inspection and maintenance. Utility Model Content

[0006] The technical problem to be solved by this utility model is: how to solve the various problems caused by the use of diagonal tie rods mentioned in the background art.

[0007] The technical solution adopted by this utility model is: a tie rod device for a push-type heating furnace, including a pin block (8) and a horizontal tie rod. The pin block (8) is welded to the bend of the water beam (1) at the billet inlet end of the push-type heating furnace. The two ends of the horizontal tie rod are respectively connected to the pin block (8) and a fixing point. The fixing point is a support point fixed on the ground outside the push-type heating furnace. The pin block (8) and the horizontal tie rod are fixedly connected by a pin.

[0008] The tie rod device also includes an arc-shaped block (2), of which there are two and both are welded to the bend of the water beam (1). The arc-shaped block (2) is located outside the pin block (8) and is welded to the pin block (8). The purpose of the arc-shaped block (2) is to reinforce the connection between the pin block (8) and the water beam (1) and prevent the pin block (8) from detaching from the water beam (1) or causing damage to the water beam (1).

[0009] The horizontal tie rod includes two types; the first type of horizontal tie rod includes a flat beam (3) and a threaded rod (4), the top pin of the flat beam (3) is connected to a pin block (8), and the two shoulders of the flat beam (3) are each connected to a threaded rod by a pin, the threaded rod (4) includes two threaded rods of equal or unequal length; the second type of horizontal tie rod includes threaded rods; each threaded rod consists of two threaded rods connected by a locking device (10), one end of each threaded rod is connected to the shoulder of the flat beam or the pin block (8), and the other end is connected to a fixed point. Note: There are multiple fixed points (support points fixed to the ground), each threaded rod is connected to one fixed point, and then connected by a locking device (10).

[0010] The first type of horizontal tie rod also includes a Y-shaped connector (9), the fork of the Y-shaped connector (9) is connected to the pin block (8) by a pin, and the non-fork of the Y-shaped connector (9) is connected to the top of the spreader beam (3) by a pin; the second type of horizontal tie rod also includes a Y-shaped connector (9), the fork of the Y-shaped connector (9) is connected to the pin block (8) by a pin, and the non-fork of the Y-shaped connector (9) is connected to the threaded rod by a pin.

[0011] There are two or more water beams (1), and the number of pin blocks (8) and horizontal tie rods is equal to the number of water beams (1).

[0012] The beneficial effects of this utility model are: This utility model transforms the inclined tie rod into a horizontal tie rod, and moves the adjusting nut (locking device) to a position outside the roller conveyor or further away (fixed point), away from the heating furnace body, thus solving the drawbacks of using an inclined tie rod. During use, this utility model requires determining the balanced force state of each water beam and setting and marking the initial position of the adjusting nut (locking device). Employees regularly inspect the tie rods, checking the position changes of the adjusting nut on-site according to the inspection standards. When the position of the adjusting nut is found to exceed the initially set range, it is determined that the water beam is under uneven force. On-site, a wrench is used to adjust the adjusting nut of the horizontal tie rod until it is turned to the initially set range to achieve balanced force.

[0013] The horizontal tie rod adjustment end (locking device position) of this invention is far away from the high-temperature area of ​​the heating furnace, making tension adjustment and maintenance convenient. This invention improves the on-site working environment and reduces the labor intensity of employees. The horizontal tie rod is also far from the high-temperature baking area, reducing rust and deformation and extending its service life. This invention improves the overall stability of the equipment and ensures the safe operation of the heating furnace. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the spreader beam structure of this utility model; Figure 3 This is a schematic diagram of an existing diagonal tie rod connection structure; Figure 4 This is a schematic diagram of the horizontal tie rod connection according to an embodiment of the present invention; Figure 5 yes Figure 4 A top view diagram; Figure 6 This is a schematic diagram of the arc-shaped block welding of this utility model; Figure 7 This is a schematic diagram of the locking device structure in an embodiment of this utility model; Among them, 1. Water beam, 2. Arc block, 3. Spread beam, 4. Threaded rod, 5. Connecting plate, 6. Diagonal tie rod, 7. Steel pusher, 8. Pin block, 9. Y-shaped connector, 10. Locking device. Detailed Implementation

[0015] The pusher-type continuous heating furnace (pusher-type reheating furnace) is an important industrial piece of equipment in the rolling mill field. To achieve continuous heating of the steel billet, a water beam (or furnace rib tube) is installed inside the pusher-type continuous heating furnace. The water beam connects to the steel billet inlet and outlet of the furnace. A high-temperature and wear-resistant sliding block is fixed directly above the water beam tube wall. Under the action of the pusher, the steel billet moves continuously on the high-temperature and wear-resistant sliding block, completing the heating process. At least two water beams are required to keep the steel billet balanced. In actual production, several water beams are arranged inside the pusher-type reheating furnace according to the width of the furnace body, such as... Figure 5 As shown, the pusher-type continuous heating furnace in this embodiment is equipped with 5 water beams.

[0016] As the steel billet moves from the inlet to the outlet of the pusher-type heating furnace under the action of the pusher 7, it exerts a fluctuating horizontal force on the water beam. To maintain uniform force distribution, in existing technology, a connecting plate is welded to the end of the water beam at the inlet of the pusher-type continuous heating furnace (at the bend of the water beam). This connecting plate is then connected to a fixed point on the ground via a diagonal tie rod 6. Figure 3 As shown, the tie rods are used to balance the horizontal forces received by the water beam. In actual use, it has been found that the tie rods can offset some of the water beam's vibration. Compared to water beams without tie rods, vibration is reduced, the water beam is more stable, and its service life is extended.

[0017] However, due to terrain limitations and the constraints of the steel pusher, the fixing point of the tie rod 6 is located on the ground between the steel pusher and the inlet of the steel pusher-type heating furnace. At this location, the tie rod 6 is subject to heat radiation from the steel pusher-type heating furnace, resulting in a higher temperature for the tie rod 6. The drawbacks of the tie rod are as follows: Because the diagonal tie rod is adjusted at a high frequency, it is necessary to be close to the heating furnace body during operation, where the temperature is high, resulting in a relatively high labor intensity for employees. Since the diagonal tie rod is located below the steel billet, the steel billet above the diagonal tie rod must be lifted away before adjustment, which increases the difficulty of the operation and affects the timeliness of the adjustment. Because the tie rod is prone to corrosion or jamming in high temperature and high humidity environments, it makes adjustment difficult; The foundation of the fixed end of the tie rod may settle or deform due to long-term heat or load, affecting the stability of the tie rod.

[0018] The narrow distance between the tie rod and the furnace body, coupled with the harsh environment (high temperature), increases the difficulty of inspection and maintenance.

[0019] To address the problems existing in the tie rod, this utility model improves the tie rod.

[0020] like Figure 1 and 2As shown, a tie rod device for a push-type heating furnace includes a pin block 8 and a horizontal tie rod (i.e., a connecting rod that keeps the furnace horizontal during use). The pin block 8 is welded to the bend of the water beam 1 at the billet inlet end of the push-type heating furnace. Since this utility model is an improvement on existing technology, and existing technology has a connecting plate 5, this utility model welds the pin block 8 (named so because the pin block has a pin hole for connection) on the basis of the connecting plate 5. The pin block 8 is a plate adapted to the bend of the water beam. The pin block 8 is welded to the side of the connecting plate 5. On the one hand, it does not need to remove the connecting plate 5, and on the other hand, it can enhance the welding stability of the pin block 8. In order to further enhance the stability of the pin block 8, this utility model welds two arc-shaped blocks 2 on both sides of the connecting plate 5 and the pin block 8. There are two arc-shaped blocks 2, and both are welded to the bend of the water beam 1.

[0021] like Figure 4 , 5 As shown in Figures 6 and 7, the horizontal tie rods include two types, each used to connect different water beams. A steel pusher and its supporting equipment need to be installed at the inlet of the continuous heating furnace. To avoid the steel pusher and its supporting equipment obstructing the horizontal tie rods and affecting their installation, this invention employs two types of horizontal tie rods.

[0022] The first type of horizontal tie rod is designed to avoid obstruction. It includes a spreader beam 3, threaded rods 4, and a Y-shaped connector 9. The top pin of the spreader beam 3 connects to the Y-shaped connector 9, which in turn connects to a pin block 8. Each shoulder of the spreader beam 3 is pinned to a threaded rod, which consists of two threaded rods of unequal length. Each threaded rod comprises two sections connected by a locking device 10 (adjusting nut). One end of each threaded rod connects to the shoulder of the spreader beam or the pin block 8, while the other end connects to a fixing point. The threads of the two sections of threaded rod rotate in opposite directions to those of the locking device 10, allowing adjustment of the tension of the horizontal tie rod by rotating the locking device 10 (adjusting nut). This invention bypasses the steel pusher and its associated equipment by using the spreader beam 3. The fixing point of this invention is located in a position unaffected by radiation from the continuous heating furnace, or in a position with minimal radiation influence; that is, the fixing point of this invention is far from the continuous heating furnace.

[0023] The second type of horizontal tie rod includes a threaded rod and a Y-shaped connector 9. The fork of the Y-shaped connector 9 is connected to the pin block 8 via a pin, and the non-fork of the Y-shaped connector 9 is connected to the threaded rod via a pin. Each threaded rod consists of two threaded rod sections connected by a locking device 10 (adjusting nut). One end of each threaded rod is connected to the shoulder of the spreader beam or the pin block 8, and the other end is connected to a fixing point.

[0024] Note: There are multiple fixing points (support points fixed to the ground). Each threaded rod is connected to one fixing point and then connected by locking device 10.

Claims

1. A pull rod device for a push-type steel heating furnace, characterized in that: It includes a pin block (8) and a horizontal tie rod. The pin block (8) is welded to the bend of the water beam (1) at the billet inlet end of the push-type heating furnace. The two ends of the horizontal tie rod are respectively connected to the pin block (8) and a fixing point. The fixing point is a support point fixed on the ground outside the push-type heating furnace. The pin block (8) and the horizontal tie rod are fixedly connected by a pin.

2. The pull rod device for a push-type heating furnace according to claim 1, characterized in that: The tie rod device also includes an arc block (2), there are two arc blocks and both are welded to the bend of the water beam (1). The arc block (2) is located outside the pin block (8) and is welded to the pin block (8).

3. The pull rod device for a push-type steel heating furnace according to claim 1, characterized in that: The horizontal tie rod includes two types; the first type of horizontal tie rod includes a flat beam (3) and a threaded rod (4), the top pin of the flat beam (3) is connected to a pin block (8), and the two shoulders of the flat beam (3) are respectively connected to a threaded rod by pins, the threaded rod (4) includes two threaded rods of equal or unequal length; the second type of horizontal tie rod includes a threaded rod; each threaded rod consists of two threaded rods connected by a locking device (10), one end of each threaded rod is connected to the shoulder of the flat beam or the pin block (8), and the other end is connected to a fixing point.

4. The pull rod device for a push-type steel heating furnace according to claim 3, characterized in that: The first type of horizontal tie rod also includes a Y-shaped connector (9), the fork of the Y-shaped connector (9) is connected to the pin block (8) by a pin, and the non-fork of the Y-shaped connector (9) is connected to the top of the spreader beam (3) by a pin; the second type of horizontal tie rod also includes a Y-shaped connector (9), the fork of the Y-shaped connector (9) is connected to the pin block (8) by a pin, and the non-fork of the Y-shaped connector (9) is connected to the threaded rod by a pin.

5. The pull rod device for a push-type heating furnace according to claim 1, characterized in that: There are two or more water beams (1), and the number of pin blocks (8) and horizontal tie rods is equal to the number of water beams (1).

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