In-situ locking device for steel-making continuous casting flame cutting trolley

Abstract

The utility model belongs to the technical field of continuous casting equipment, and particularly relates to an in-situ locking device for a steel-making continuous casting flame cutting trolley. The problem that the flame cutting trolley cannot accurately stop in situ can be effectively solved, and efficient and stable operation of the continuous casting production process is guaranteed. Comprising a locking device fixedly installed on the flame cutting trolley, the locking device comprises a lock body, and a center hole is formed in the lock body. Guide pins are arranged on the lock body and on the two sides of the center hole respectively, and the two guide pins are the same in structure and collinear in axis; the tail end of each guide pin is fixed on the lock body through a pressure spring of the guide pin, and the pressure springs are arranged between the guide pins and the lock body and used for providing elastic restoring force, so that the guide pins can automatically reset when not subjected to external force; and a ball is arranged at the head end of each guide pin. A lock pin is arranged at one end of the flame cutting trolley, the lock pin and a center hole of the lock body are coaxially arranged, and two clamping grooves of the same structure are symmetrically formed in the middle of the lock pin. And each clamping groove corresponds to one guide pin.

Description

Technical Field

[0001] The utility model belongs to the technical field of continuous casting equipment, in particular to an in-situ locking device for a steelmaking continuous casting fire-cutting trolley. Background Art

[0002] The continuous casting process is a critical step in the steel production process, directly impacting steel quality and production efficiency. The continuous casting torch-cutting trolley is responsible for smoothly pulling the ingots from the continuous casting mold through the straightening machine, and then precisely cutting them into billets of specific length and cross-sectional shape to meet subsequent processing requirements.

[0003] In traditional steelmaking and continuous casting operations, after completing its slab cutting task, the torch carriage must return to its initial home position to prepare for the next round of cutting. However, existing technology has a significant drawback: when the torch carriage returns and hits the home stop plate, it inevitably rebounds due to the carriage's own inertia and the impact force generated by the mechanical collision. This rebound prevents the torch carriage from accurately stopping at its preset home position, resulting in an inaccurate return to its home position.

[0004] If the torch-cutting carriage fails to return to its original position, subsequent cutting operations become fraught with difficulties. When cutting the next billet, it becomes difficult to precisely control the cutting length, making it easy to cut short. These short billets flow into the rolling process, where the resulting steel fails to meet standard length requirements, resulting in off-length steel. For steel mills, off-length steel is equivalent to waste, failing to meet market demand for high-quality steel and resulting in a significant waste of resources.

[0005] Even more serious is the frequent occurrence of multiple short-length scraps during production, leading to a sharp increase in the number of defective products. On the one hand, companies must invest additional manpower and material resources to sort and process these scraps, increasing direct processing costs. On the other hand, the large number of qualified products replaced by scrap significantly increases the scrap rate during the rolling and cutting processes. Summary of the Invention

[0006] The utility model addresses the defects of the prior art and provides an in-situ locking device for a steelmaking continuous casting hot-cutting trolley, which can effectively prevent the hot-cutting trolley from being unable to stop accurately in its original position, thereby ensuring the efficient and stable operation of the continuous casting production process.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: an in-situ locking device for a steelmaking continuous casting fire-cutting trolley, comprising a locking device fixedly mounted on the fire-cutting trolley, the locking device comprising a lock body, and a center hole is formed on the lock body.

[0008] A guide pin is provided on each side of the center hole on the lock body, and the two guide pins have the same structure and their axes are collinear; the end of each guide pin is fixed to the lock body by its own compression spring, which is arranged between the guide pin and the lock body to provide elastic restoring force so that the guide pin automatically resets when not subjected to external force; a ball is provided at the head end of each guide pin.

[0009] A lock pin is provided at one end of the fire cutting trolley. The lock pin is coaxially arranged with the central hole of the lock body. Two slots with the same structure are symmetrically provided in the middle of the lock pin; and each slot corresponds to a guide pin.

[0010] When the fire cutting trolley returns to its original position, the locking pin is inserted into the center hole, the head end of the guide pin is inserted into the corresponding slot, and the ball contacts the bottom of the slot under the action of the compression spring.

[0011] Furthermore, the locking pin is in a cylindrical structure, and a pointed guide head is provided at the front end of the cylindrical structure to enable the locking pin to smoothly enter the center hole.

[0012] Furthermore, the bottom of the slot is in a convex arc shape.

[0013] Furthermore, a compression spring groove is provided on the lock body, each compression spring corresponds to a compression spring groove, and a T-shaped plug is plugged at the top of the compression spring groove to limit the compression spring in the compression spring groove; one end of the compression spring abuts against the T-shaped plug, and the other end of the compression spring is connected to the guide pin.

[0014] Furthermore, the guide pin includes a fixing portion located in the compression spring groove and an inclined portion connected to the fixing portion, wherein the fixing portion is connected to the compression spring and the fixing portion is confined in the compression spring groove, and the free end of the inclined portion extends into the center hole.

[0015] Furthermore, the ball is embedded in the arc groove at the free end of the inclined portion in a clearance fit manner, and the arc surface coverage angle of the arc groove around the ball is greater than a semicircle, ensuring that the ball is embedded in the arc groove and is not easy to fall off.

[0016] Furthermore, a side baffle is provided on the inclined portion and on both sides of the ball, and the side baffle is detachably connected to the inclined portion; the end of the side baffle blocks the ball to prevent the ball from sliding out from the side.

[0017] Furthermore, a buffer body is installed at the bottom of the center hole. The buffer body is made of rubber material and is used to absorb impact force.

[0018] Furthermore, the lock body is rotatably mounted on the fixed plate through an axis, one end of the axis is fixedly connected to the lock body, and the other end of the axis passes through the through hole on the fixed plate, and a gear is installed on the end portion of the passed-out end; the gear is meshed and connected to a rack, and the rack is driven by a cylinder drive mechanism and moves up and down, driving the lock body to rotate 90° through the gear, so that the guide pin withdraws from the slot to release the fire cutting trolley.

[0019] Furthermore, the cylinder drive mechanism includes a cylinder mounted on a fixed plate, and the cylinder is fixed to the fixed plate through a cylinder bracket; the cylinder rod of the cylinder is set upward, and the end of the cylinder rod is connected to the bottom of the rack, driving the rack to move up and down.

[0020] Compared with the prior art, the utility model has beneficial effects.

[0021] The utility model adopts a mechanical locking structure to effectively prevent the fire cutting trolley from bouncing in place and causing inaccurate parking. At the same time, a reliable release mechanism is provided to ensure reliable trolley release. In addition, a rubber buffer mechanism is provided on the locking structure to effectively cushion the impact of the trolley when it is parked. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0023] Figure 1 This is a main view of an in-situ locking device for a steelmaking and continuous casting fire-cutting trolley.

[0024] Figure 2 This is a locked state view of the in-situ locking device of the steelmaking continuous casting fire cutting trolley.

[0025] Figure 3 This is a right view of an in-situ locking device for a steelmaking and continuous casting fire-cutting trolley.

[0026] Figure 4 It is a three-dimensional view of the fire cutting trolley with an in-situ locking device for steelmaking and continuous casting.

[0027] Figure 5 It is a three-dimensional view of the guide pin of the in-situ locking device of the steelmaking continuous casting fire cutting trolley.

[0028] Figure 6 This is a schematic diagram of the guide pin exiting the slot.

[0029] In the figure, 1, the fire cutting trolley; 2, the locking device;

[0030] 201. Fixing plate; 202. Cylinder bracket; 203. Cylinder; 204. Cylinder rod; 205. Connecting sleeve; 206. Rack; 207. Back wheel; 208. Gear; 209. Lock nut; 210. Shaft; 211. Lock body; 212. Center hole; 213. Guide pin; 214. Buffer body; 215. T-nut; 216. Compression spring; 217. Roller; 218. Lock pin; 219. Guide head; 220. Slot; 221. Side baffle.

[0031] 2201, groove bottom; 2131, fixing portion; 2132, inclined portion; 21323, inclined surface of inclined portion;

[0032] 2181. Outer peripheral surface of the cylindrical structure; 2182. Compression spring groove. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and beneficial effects of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0034] like Figure 1-6 As shown, the in-situ locking device for a steelmaking continuous casting hot-cutting carriage includes a locking device 2 fixedly mounted in place on the hot-cutting carriage. The locking device 2 comprises a lock body 211 with a center hole 212 defined therein. A guide pin 213 is positioned on each side of the lock body 211, with the two guide pins 213 having identical structures and collinear axes. The distal end of each guide pin 213 is secured to the lock body 211 via a respective compression spring 216 disposed between the guide pin 213 and the lock body 211, providing an elastic restoring force that automatically resets the guide pin 213 when no external force is applied. A ball bearing 217 is positioned at the distal end of each guide pin 213. A locking pin 218 is positioned coaxially with the center hole 212 of the lock body 211. Two identical retaining grooves 220 are symmetrically positioned in the middle of the lock pin 218, each retaining groove 220 corresponding to a guide pin 213. When the fire cutting carriage returns to its original position, the locking pin 218 is inserted into the center hole 212, the head end of the guide pin 213 is inserted into the corresponding slot 220, and the ball 217 contacts the bottom 2201 of the slot under the action of the compression spring 216.

[0035] Example 1: The lock pin 218 is a cylindrical structure with a pointed guide head 219 at the front end. The pointed guide head 219 is a conical or arrow-shaped design that can effectively guide the lock pin 218 into the center hole 212. Even in the case of slight alignment errors, it can ensure that the lock pin can be inserted smoothly and without obstruction. The bottom 2201 of the slot is in the shape of a raised arc. When the locking process is completed and it is necessary to unlock the fire cutting trolley 1 to leave its original position for the next cutting operation, the lock body rotates 90 degrees. During this rotation process, as shown in FIG. Figure 6 As shown, the portion of the guide pin originally located within the slot 220 slides to the outer circumferential surface 2181 of the cylindrical structure, which is the side of the locking pin 218. At this point, the guide pin 213 exits the slot 220, no longer blocking the movement path, allowing the fire-cutting carriage to move freely. This functional transition between locking and unlocking ensures operational safety and improves work efficiency.

[0036] In Example 2, the lock body 211 is provided with compression spring slots 2182, each corresponding to a compression spring 216. A T-shaped plug 215 is removably connected to the top of the compression spring slot 2182 to retain the compression spring 216 within the compression spring slot 2182. One end of the compression spring 216 abuts the T-shaped plug 215, while the other end of the compression spring 216 is connected to the guide pin 213. The removable plug connection simplifies the assembly process and allows for quick adjustment or replacement of the compression spring 216 when necessary, improving equipment maintenance efficiency.

[0037] Guide pin 213 includes a fixed portion 2131 positioned within compression spring slot 2182 and an inclined portion 2132 connected to the fixed portion. Fixed portion 2131 is connected to compression spring 216 and is confined within compression spring slot 2182. The free end of inclined portion 2132 extends into center hole 212. The fixed portion 2131's position within compression spring slot 2182 ensures that the guide pin can move in the intended direction without deflection when subjected to force. The design of inclined portion 2132 helps guide ball bearing 217 into slot 220, making the locking and unlocking process smoother and more stable.

[0038] Ball 217 fits into the arcuate groove at the free end of the inclined portion 2132 with a clearance fit. The arcuate groove's arcuate surface around ball 217 covers an angle greater than a semicircle, or greater than 180 degrees, ensuring that ball 217 is embedded within the arcuate groove and resists dislodging. Side baffles 221 are provided on the inclined portion 2132, on either side of ball 217, and are detachably connected to the inclined portion 2132. The ends of the side baffles 221 shield ball 217, preventing it from sliding out. This detachable connection allows for easy removal of these side baffles when the device requires inspection or maintenance, facilitating the inspection and replacement of internal components.

[0039] Embodiment 3: A buffer body 214 is installed at the bottom of the center hole 212. The buffer body 214 is made of rubber and is used to absorb impact force. When the lock pin 218 of the fire cutting trolley (1) is inserted into the center hole 212, a certain impact force may be generated due to movement inertia or improper operation. At this time, the buffer body 214 located at the bottom of the center hole can effectively absorb and disperse this part of the energy, reducing the pressure directly transmitted to the lock body 211 and its internal components. This helps to prevent structural damage or wear caused by impact, thereby extending the service life of the entire locking device.

[0040] Example 4: The lock body 211 is rotatably mounted on the fixed plate 201 via the shaft 210. One end of the shaft 210 is fixedly connected to the lock body 211. The other end of the shaft passes through the through hole on the fixed plate 201, and a gear 208 is installed at the end that passes through. A locking nut 209 is installed at the end of the shaft and one side of the gear for axially blocking the gear 209.

[0041] Gear 208 meshes with a rack 206, which is driven up and down by a cylinder drive mechanism. The cylinder drive mechanism includes a cylinder 203 mounted on a fixed plate 201 and secured to the fixed plate 201 via a cylinder bracket 202. Cylinder 203 has an upward-facing cylinder rod 204, the end of which connects to the bottom of rack 206, driving rack 206 up and down. Gear 208 rotates the lock body 211 90°, allowing the guide pin 213 to exit the slot 220 and reach the outer surface 2181 of the cylindrical structure of the lock pin, thereby releasing the fire-cutting carriage.

[0042] The following describes the use of the present invention in conjunction with the accompanying drawings and technical solutions:

[0043] 1. When the fire cutting trolley completes the cutting work and moves back to the original position, a lock pin is fixed on one end of the fire cutting trolley, and the lock pin is coaxially arranged with the center hole of the lock body.

[0044] 2. The locking device is fixedly installed in the original position of the fire cutting trolley.

[0045] 3. A guide head is provided at the front end of the lock pin, which has a guiding function to facilitate the lock pin to enter the center hole; a slot structure is provided in the middle of the lock pin, and the two ends of the slot extend to an arc surface with the same diameter as the lock pin through an arc transition.

[0046] 4. When the fire cutting trolley returns to its original position, the locking pin is inserted into the center hole and the trolley continues to move forward under the action of the returning inertia.

[0047] 5. The guide head of the lock pin contacts the ball of the guide pin, and the inclined surface of the guide head pushes the roller to both sides. The roller pushes the guide pin to both sides. The movement of the guide pin causes the compression spring to be compressed and deformed, and the guide pin is retracted into the compression spring cavity. At this time, the lock pin continues to move forward until the locking groove of the lock pin reaches the top of the guide pin. Under the reaction of the compression spring, the guide pin pushes the guide pin into the corresponding groove. The guide pin is inserted into the groove and the precise positioning of the return of the fire cutting carriage is achieved.

[0048] 6. The roller is installed at the front end of the guide pin. The roller is inserted into the arc groove at the front end of the guide pin with a clearance fit. The arc surface of the arc groove covering the roller is greater than 180° to ensure that the roller will not fall out of the arc groove. The purpose is to convert sliding friction into rolling friction when the locking pin and the roller come into contact.

[0049] 7. When the fire-cutting carriage is ready to perform the next cutting operation, the cylinder operates, causing the cylinder rod to push the rack, which in turn rotates the gear 90°. The gear drives the lock body through the shaft to rotate 90°. During this rotation, the guide pin rotates 90° relative to the fire-cutting carriage. After the guide pin rotates 90°, it exits the slot through the arc transition section (arc surface) of the slot and reaches the outer peripheral surface 2181 of the cylindrical structure. At this point, the lock pin function is disabled, and the fire-cutting carriage, driven by its own power, starts from its original position to perform the next cutting operation.

[0050] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "preferred embodiments," "specific implementations," or "preferred implementations" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. Therefore, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of the present invention.

Claims

1. An in-situ locking device for a steelmaking continuous casting hot-cutting trolley, comprising a locking device (2) fixedly mounted on the hot-cutting trolley, characterized in that: The locking device (2) comprises a lock body (211), and a central hole (212) is formed on the lock body (211); A guide pin (213) is provided on each side of the central hole (212) on the lock body (211), and the two guide pins (213) have the same structure and their axes are collinear; the end of each guide pin (213) is fixed to the lock body (211) through its own compression spring (216), which is provided between the guide pin (213) and the lock body (211) and is used to provide elastic restoring force so that the guide pin (213) automatically resets when no external force is applied; a ball (217) is provided at the head end of each guide pin (213); A lock pin (218) is provided at one end of the fire cutting trolley (1), the lock pin (218) is coaxially arranged with the center hole (212) of the lock body (211), and two identically structured slots (220) are symmetrically provided in the middle of the lock pin (218); and each slot (220) corresponds to a guide pin (213); When the fire cutting trolley returns to its original position, the locking pin (218) is inserted into the center hole (212), the head end of the guide pin (213) is inserted into the corresponding slot (220), and the ball (217) contacts the bottom (2201) of the slot under the action of the compression spring (216).

2. The locking device according to claim 1, characterized in that The locking pin (218) is a cylindrical structure, and a pointed guide head (219) is provided at the front end of the cylindrical structure for allowing the locking pin (218) to smoothly enter the central hole (212).

3. The locking device according to claim 2, characterized in that The bottom (2201) of the slot is in a convex arc shape.

4. The locking device according to claim 1, wherein: The lock body (211) is provided with a compression spring groove (2182), each compression spring (216) corresponds to a compression spring groove (2182), and a T-shaped plug (215) is plugged at the top of the compression spring groove (2182) for limiting the compression spring (216) in the compression spring groove (2182); one end of the compression spring (216) abuts against the T-shaped plug (215), and the other end of the compression spring (216) is connected to the guide pin (213).

5. The locking device according to claim 4, characterized in that: The guide pin (213) includes a fixed portion (2131) located in the compression spring groove (2182) and an inclined portion (2132) connected to the fixed portion, wherein the fixed portion (2131) is connected to the compression spring (216) and the fixed portion is limited to the compression spring groove (2182), and the free end of the inclined portion (2132) extends into the center hole (212).

6. The locking device according to claim 5, characterized in that: The ball (217) is embedded in the arc groove at the free end of the inclined portion (2132) in a clearance fit manner, and the arc surface coverage angle of the arc groove around the ball (217) is greater than a semicircle, ensuring that the ball (217) is embedded in the arc groove and is not easy to fall off.

7. The locking device according to claim 1, wherein: A side baffle (221) is provided on the inclined portion (2132) and on both sides of the ball (217), and the side baffle (221) is detachably connected to the inclined portion (2132); the end of the side baffle (221) blocks the ball (217) to prevent the ball (217) from sliding out from the side.

8. The locking device according to claim 1, wherein: A buffer body (214) is installed at the bottom of the central hole (212). The buffer body (214) is made of rubber material and is used to absorb impact force.

9. The locking device according to claim 1, characterized in that The lock body (211) is rotatably mounted on the fixed plate (201) via a shaft (210). One end of the shaft (210) is fixedly connected to the lock body (211). The other end of the shaft passes through a through hole on the fixed plate (201), and a gear (208) is mounted on the end of the shaft that passes through the through hole. The gear (208) is meshed and connected to a rack (206). The rack (206) is driven by a cylinder drive mechanism to move up and down, and drives the lock body (211) to rotate 90 degrees via the gear (208), so that the guide pin (213) exits the slot (220).

10. The locking device according to claim 9, characterized in that The cylinder drive mechanism comprises a cylinder (203) mounted on a fixed plate (201), wherein the cylinder (203) is fixed to the fixed plate (201) via a cylinder bracket (202); a cylinder rod (204) of the cylinder (203) is arranged upward, and an end of the cylinder rod (204) is connected to the bottom of a rack (206), thereby driving the rack (206) to move up and down.

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