In-furnace impact-resistant material blocking mechanism for steel billets

Abstract

The utility model relates to the technical field of steel rolling heating furnaces, in particular to an in-furnace impact-resistant material blocking mechanism for steel billets, which comprises a first water-cooling shaft tube and a second water-cooling shaft tube which can be sleeved with each other, and a third water-cooling shaft tube is sleeved on the outer side of the second water-cooling shaft tube; the rear end of the first water-cooling shaft tube is connected with the rear end of the second water-cooling shaft tube through a first annular shaft cover, and a water inlet connector is formed in the second water-cooling shaft tube close to the first annular shaft cover. A second annular shaft cover is arranged at the position, close to the water inlet connector, of the rear end of the third water-cooling shaft pipe, and a water outlet connector is formed in the position close to the second annular shaft cover. The front end of the first water-cooling shaft tube is sleeved with a baffle, the inner wall of the baffle is welded to the front end of the third water-cooling shaft tube, a gap is reserved between the front end of the second water-cooling shaft tube and the inner wall of the baffle, and a water circulation reversing channel of the first water circulation cavity and the second water circulation cavity is formed. The mechanism is simple in structure, easy to assemble and machine, good in use effect and capable of effectively bearing the impact of the steel billet.

Description

Technical Field

[0001] This utility model relates to the field of steel rolling heating furnace technology, and in particular to an impact-resistant baffle mechanism for steel billets inside the furnace. Background Technology

[0002] With the increasing automation of steel rolling systems, steel rolling heating furnaces must also simultaneously achieve automatic billet loading, heating, and unloading. The main problem with existing automatic billet loading systems for steel rolling heating furnaces that use cantilever roller conveyors for side entry is that the billets cannot be accurately positioned on the cantilever roller conveyors inside the furnace, making it difficult to achieve automatic billet loading and thus affecting the automated production rhythm of the entire steel rolling system.

[0003] A common method involves installing a rotary encoder on the motor of the cantilever roller conveyor inside the furnace. The position of the billet within the furnace is calculated by measuring the number of revolutions of the roller conveyor. The main drawback of this method is that slippage between the billet and the roller conveyor often results in significant positioning deviations (typically exceeding 100mm), frequently requiring manual adjustment via a furnace-mounted camera. Another method involves opening a hole in the furnace side wall above the buffer baffle and then mounting a laser rangefinder at an angle to position the billet within the furnace. The main drawback of this method is that billets generally have varying cross-sectional dimensions, many different lengths, and are prone to bending, often making positioning on the cantilever roller conveyor difficult and requiring frequent manual intervention.

[0004] In view of the above problems, Chinese utility model patent CN221320042U discloses a furnace positioning buffer device for steel billets, including a water-cooled shaft assembly with a central shaft through hole. The water-cooled shaft assembly includes a first shaft tube and a second shaft tube that are nested together, and a third shaft tube that is nested around the second shaft tube. The first shaft tube and the second shaft tube form a first water-cooling cavity after being nested together, and the second shaft tube and the third shaft tube form a second water-cooling cavity after being nested together. Both ends of the first water-cooling cavity and both ends of the second water-cooling cavity are sealed by annular shaft covers. A water inlet hole is provided on the second shaft tube, and the water inlet hole connects the first water-cooling cavity and the second water-cooling cavity. This device not only prevents the steel billet from hitting the furnace side wall, but also facilitates the installation of a laser rangefinder at its outer end to achieve precise positioning of the steel billet in the cantilever roller conveyor in the furnace, achieving the purpose of fully automatic loading and safe use.

[0005] However, in practice, since the baffle head sleeve is used as the contact part with the steel billet, the structure is very easy to break under long-term high temperature and impact with the steel billet, which affects the service life of the device. Furthermore, since the connection between the first water cooling chamber and the second water cooling chamber is achieved by opening a water inlet hole on the second shaft tube, it not only increases the processing difficulty, but also the water inlet hole is very easy to be blocked by scale during long-term use, which affects water circulation.

[0006] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0007] The purpose of this invention is to overcome the problems of the prior art and provide an impact-resistant baffle mechanism for steel billets in a furnace. This addresses the issue that the existing technology uses a baffle head sleeve as the contact part with the steel billet, which is prone to breakage under long-term high temperature and impact with the steel billet, thus affecting the service life of the device. Furthermore, the connection between the first and second water-cooling chambers is achieved by opening a water inlet hole on the second shaft tube, which not only increases the processing difficulty but also makes the water inlet hole prone to scale blockage during long-term use, thus affecting water circulation.

[0008] The above objectives are achieved through the following technical solutions:

[0009] An impact-resistant baffle mechanism for steel billets in a furnace includes a first water-cooled shaft tube and a second water-cooled shaft tube that are nested together to form a first water circulation chamber. A third water-cooled shaft tube is nested on the outside of the second water-cooled shaft tube to form a second water circulation chamber. The rear ends of the first water-cooled shaft tube and the second water-cooled shaft tube are connected by a first annular shaft cover to seal the rear end of the first water circulation chamber. A water inlet is provided on the second water-cooled shaft tube adjacent to the first annular shaft cover. A second annular shaft cover is provided on the rear end of the third water-cooled shaft tube near the water inlet to seal the rear end of the second water circulation chamber. A water outlet is provided on the third water-cooled shaft tube adjacent to the second annular shaft cover. A baffle is nested on the front end of the first water-cooled shaft tube. The inner wall of the baffle is welded to the front end of the third water-cooled shaft tube. A gap is left between the front end of the second water-cooled shaft tube and the inner wall of the baffle to form a water circulation reversal channel between the first water circulation chamber and the second water circulation chamber.

[0010] Furthermore, the baffle includes a baffle sleeve hole that can be sleeved onto the front end of the first water-cooled shaft tube, and the baffle sleeve hole is connected by welding after sleeved onto the front end of the first water-cooled shaft tube.

[0011] Furthermore, the baffle sleeve hole includes a sleeve hole fitting part and a sleeve hole welding part. The sleeve hole fitting part is used to fit the first water-cooled shaft tube, and the sleeve hole welding part is used to weld to the front end of the first water-cooled shaft tube.

[0012] Furthermore, the sleeve welding part is an inclined edge with an inclination angle.

[0013] Furthermore, the tilt angle is 45°.

[0014] Furthermore, the wall thickness of the second water-cooled shaft tube is not less than the wall thickness of the first water-cooled shaft tube, and the wall thickness of the third water-cooled shaft tube is not less than the wall thickness of the second water-cooled shaft tube.

[0015] Furthermore, the width of the water circulation reversing channel is greater than the wall thickness of the third water-cooled shaft tube.

[0016] Furthermore, the thickness of the baffle is not less than the wall thickness of the third water-cooled shaft tube.

[0017] Furthermore, several trapezoidal reinforcing ribs are provided between the baffle and the outer wall of the third water-cooled shaft tube.

[0018] Furthermore, the baffle is made of metal steel. Beneficial effects

[0019] This utility model provides an impact-resistant baffle mechanism for steel billets inside a furnace. It forms two water circulation chambers using only three interlocking water circulation shafts, and connects to baffles to create a water circulation reversing channel for communication between the two chambers. The baffles are welded to the first and third water circulation shafts using a combination of interlocking and welding. This mechanism is not only simple in structure and easy to assemble and process, but also highly effective in withstanding the impact of steel billets. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an impact-resistant baffle mechanism for steel billets in a furnace according to the present invention;

[0021] Figure 2 This is a schematic diagram of the working process of an impact-resistant baffle mechanism for steel billets in a furnace, as described in this utility model.

[0022] Illustration markings:

[0023] 1-First water-cooled shaft tube;

[0024] 2-Second water-cooled shaft tube;

[0025] 3-Third water-cooled shaft tube;

[0026] 4-First water circulation chamber;

[0027] 5-Second water circulation chamber;

[0028] 6-First annular shaft cover;

[0029] 7-Second annular shaft cover;

[0030] 8-Baffle, 801-Baffle sleeve hole, 802-Sleeve hole fitting part, 803-Sleeve hole welding part;

[0031] 9-Water inlet interface;

[0032] 10 - Water outlet;

[0033] 11-Water circulation reversing channel;

[0034] 12-Steel billet;

[0035] 13-Trapezoidal reinforcing rib. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the figures and embodiments.

[0037] like Figure 1 As shown, this solution provides an impact-resistant baffle mechanism for steel billets in a furnace, including a first water-cooled shaft tube 1 and a second water-cooled shaft tube 2 that can be nested together to form a first water circulation chamber 4. A third water-cooled shaft tube 3 is nested on the outside of the second water-cooled shaft tube 2 to form a second water circulation chamber 5. The rear end of the first water-cooled shaft tube 1 and the rear end of the second water-cooled shaft tube 2 are connected by a first annular shaft cover 6 to seal the rear end of the first water circulation chamber 4. A water inlet 9 is provided on the second water-cooled shaft tube 2 adjacent to the first annular shaft cover 6.

[0038] A second annular shaft cover 7 is provided at the rear end of the third water-cooled shaft tube 3 near the water inlet 9 to seal the rear end of the second water circulation chamber 5, and a water outlet 10 is provided on the third water-cooled shaft tube 3 near the second annular shaft cover 7.

[0039] A baffle 8 is sleeved on the front end of the first water-cooled shaft tube 1. The inner wall of the baffle 8 is welded to the front end of the third water-cooled shaft tube 3. A gap is left between the front end of the second water-cooled shaft tube 2 and the inner wall of the baffle 8, forming a water circulation reversal channel 11 between the first water circulation chamber 4 and the second water circulation chamber 5.

[0040] The baffle 8 is made of metal steel, which has the characteristics of high strength, high temperature resistance and corrosion resistance.

[0041] like Figure 2 As shown, the working principle is as follows:

[0042] The water circulation pump device draws cooling water into the first water circulation chamber 4 through the water inlet 9, and into the second water circulation chamber 5 through the water circulation reversing channel 11, and finally into the water circulation pump device through the water outlet 10.

[0043] By continuously operating the water circulation pump, water circulation is achieved between the first water circulation chamber 4, the water circulation reversing channel 11, and the second water circulation chamber 5, which can better dissipate and cool down the high temperature conducted by the first water-cooled shaft tube 1, the second water-cooled shaft tube 2, and the third water-cooled shaft tube 3 during operation.

[0044] Because there is always flowing cooling water in the water circulation diversion channel 11 near the inner side of the baffle 8, the baffle can be better cooled down.

[0045] As an optimization of the baffle 8 in this embodiment, the baffle 8 includes a baffle sleeve hole 801 that can be sleeved on the front end of the first water-cooled shaft tube 1. The baffle sleeve hole 801 sleeves on the front end of the first water-cooled shaft tube 1 and then connects it by welding.

[0046] Specifically, the baffle sleeve hole 801 includes a sleeve hole fitting part 802 and a sleeve hole welding part 803. The sleeve hole fitting part 802 is used to fit the first water-cooled shaft tube 1, and the sleeve hole welding part 803 is used to weld to the front end of the first water-cooled shaft tube 1.

[0047] In this structure, since the welding is located inside the baffle sleeve hole 801, the welding will not extend beyond the outer wall of the baffle, thus effectively preventing the weld from being impacted by the steel billet 12 during operation, ensuring the firmness of the connection between the baffle 8 and the first water-cooled shaft tube 1.

[0048] It should be noted that the sleeve welding part 803 is an inclined edge with an inclination angle. This structure can ensure that the welding will not interfere with the cavity of the first water-cooled shaft tube 1.

[0049] As the optimal option for the tilt angle in this embodiment, the tilt angle is 45°.

[0050] As an optimization of this embodiment, the wall thickness of the second water-cooled shaft tube 2 is not less than the wall thickness of the first water-cooled shaft tube 1, and the wall thickness of the third water-cooled shaft tube 3 is not less than the wall thickness of the second water-cooled shaft tube 2. Increasing the thickness of the outer tube provides better protection for the inner water-cooled shaft tube.

[0051] The width of the water circulation reversing channel 11 is greater than the wall thickness of the third water-cooled shaft tube 3;

[0052] The thickness of the baffle 8 is not less than the wall thickness of the third water-cooled shaft tube 3.

[0053] As a further optimization of this embodiment, a plurality of trapezoidal reinforcing ribs 13 are provided between the baffle 8 and the outer wall of the third water-cooled shaft tube 3 to further enhance the connection between the baffle 8 and the third water-cooled shaft tube 3.

[0054] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in this utility model are included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A furnace-in-place impact-resistant baffle mechanism for steel billets, characterized in that, It includes a first water-cooled shaft tube (1) and a second water-cooled shaft tube (2) that can be nested together to form a first water circulation chamber (4). A third water-cooled shaft tube (3) is nested on the outside of the second water-cooled shaft tube (2) to form a second water circulation chamber (5). The rear end of the first water-cooled shaft tube (1) and the rear end of the second water-cooled shaft tube (2) are connected by a first annular shaft cover (6) to seal the rear end of the first water circulation chamber (4). A water inlet (9) is provided on the second water-cooled shaft tube (2) adjacent to the first annular shaft cover (6). A second annular shaft cover (7) is provided at the rear end of the third water-cooled shaft tube (3) near the water inlet (9) to seal the rear end of the second water circulation chamber (5), and a water outlet (10) is provided on the third water-cooled shaft tube (3) near the second annular shaft cover (7). A baffle (8) is sleeved on the front end of the first water-cooled shaft tube (1). The inner wall of the baffle (8) is welded to the front end of the third water-cooled shaft tube (3). A gap is left between the front end of the second water-cooled shaft tube (2) and the inner wall of the baffle (8), forming a water circulation reversal channel (11) between the first water circulation chamber (4) and the second water circulation chamber (5).

2. The furnace-in-place impact-resistant baffle mechanism for steel billets according to claim 1, characterized in that, The baffle (8) includes a baffle sleeve hole (801) that can be sleeved on the front end of the first water-cooled shaft tube (1). The baffle sleeve hole (801) is sleeved on the front end of the first water-cooled shaft tube (1) and then connected by welding.

3. The furnace-in-place impact-resistant baffle mechanism for steel billets according to claim 2, characterized in that, The baffle sleeve hole (801) includes a sleeve hole fitting part (802) and a sleeve hole welding part (803). The sleeve hole fitting part (802) is used to fit the first water-cooled shaft tube (1), and the sleeve hole welding part (803) is used to weld to the front end of the first water-cooled shaft tube (1).

4. The furnace-in-place impact-resistant baffle mechanism for steel billets according to claim 3, characterized in that, The sleeve welding part (803) is an inclined edge with an inclination angle.

5. The furnace-in-place impact-resistant baffle mechanism for steel billets according to claim 4, characterized in that, The tilt angle is 45°.

6. The furnace-in-place impact-resistant baffle mechanism for steel billets according to claim 1, characterized in that, The wall thickness of the second water-cooled shaft tube (2) is not less than the wall thickness of the first water-cooled shaft tube (1), and the wall thickness of the third water-cooled shaft tube (3) is not less than the wall thickness of the second water-cooled shaft tube (2).

7. The furnace-in-place impact-resistant baffle mechanism for steel billets according to claim 6, characterized in that, The width of the water circulation reversing channel (11) is greater than the wall thickness of the third water-cooled shaft tube (3).

8. The furnace-in-place impact-resistant baffle mechanism for steel billets according to claim 7, characterized in that, The thickness of the baffle (8) is not less than the wall thickness of the third water-cooled shaft tube (3).

9. A furnace-in-place impact-resistant baffle mechanism for steel billets according to claim 1 or 7, characterized in that, Several trapezoidal reinforcing ribs (13) are also provided between the baffle (8) and the outer wall of the third water-cooled shaft tube (3).

10. A furnace-in-place impact-resistant baffle mechanism for steel billets according to claim 1, characterized in that, The baffle (8) is made of metal steel.

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