Method for cleaning annealing furnace platform car residual core sand

Abstract

The application discloses an annealing furnace trolley residual core sand cleaning method, and belongs to the technical field of cast pipe annealing process, which comprises the following steps: S1: during annealing, residual core sand in the cast pipe falls into the sand leakage hole which is arranged around the insertion port blocking wheel and can only leak residual core sand; S2: the residual core sand in the sand leakage hole slides into the sand leakage channel which is connected with the sand leakage hole, is downwardly inclined towards the outside of the trolley and is closed by the baffle; S3: the residual core sand in the sand leakage channel is blocked by the baffle and is accumulated in the sand leakage channel to insulate heat; S4: after the annealing is completed, the baffle of the sand leakage channel outlet is opened by using the operating rod to release the residual core sand into the collecting device; and S5: the collecting device is dragged to the outside of the trolley by using the operating rod and is transported to the recycling system by the conveying device for treatment. The application can effectively prevent the accumulation of residual core sand around the insertion port blocking wheel during the annealing process, avoid the high-temperature roasting of the operator and improve the cleaning efficiency.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of cast pipe annealing process, and particularly relates to a method for cleaning residual core sand of an annealing furnace trolley. BACKGROUND

[0002] At present, when producing ductile cast iron pipes, the cast pipes need to be annealed in an annealing furnace. The cast pipes are placed on the supporting wheel set of the trolley and are axially blocked by the plug-in blocking wheels at the front and rear ends of the cast pipes. Since a certain amount of residual core sand exists in the cast pipes during the casting process, when the cast pipes slowly rotate with the supporting wheel set, the residual core sand in the cast pipes falls into the surroundings of the plug-in blocking wheels. The long-term accumulation of the residual core sand affects the rotating function of the blocking wheels. If the residual core sand is not cleaned in time, the cast pipes will be deformed, and even if the residual core sand is accumulated too much, it will fall into the supporting wheels at the lower part of the annealing furnace, increasing the rotating resistance of the supporting wheels and affecting the rotation of the cast pipes, and even causing the floating wheels on the supporting wheels to be unevenly stressed and to be tilted, the cast pipes to be out of control and scrapped, and the heat-resistant cotton in the annealing furnace chamber to be damaged, resulting in a stop of production and a serious impact on the production efficiency. The current cleaning method is that an operator stands on the support beside the annealing furnace trolley and uses an iron scraper to scrape the residual core sand into a garbage chute. The operator has to endure the residual gas smell and be roasted by the high temperature of the annealing trolley, and a lot of physical strength is consumed. Therefore, there is a need for a method for cleaning the residual core sand of the annealing furnace trolley, which can prevent the accumulation of residual core sand and avoid the roasting of the operator by high temperature. SUMMARY

[0003] The purpose of the present application is to provide a method for cleaning the residual core sand of the annealing furnace trolley, which can prevent the accumulation of residual core sand around the plug-in blocking wheels during the annealing process, avoid the roasting of the operator by high temperature, and improve the efficiency and effect of cleaning the residual core sand.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0005] A method for cleaning the residual core sand of the annealing furnace trolley, comprising the following operation steps: step S1: when the trolley enters the furnace for annealing, the residual core sand in the cast pipe gradually falls into the sand leakage hole provided around the plug-in blocking wheel and only capable of leaking the residual core sand; step S2: the residual core sand in the sand leakage hole slides into the sand leakage channel connected with the sand leakage hole, the sand leakage channel is downwardly inclined towards the outside of the trolley and is closed by a baffle at the outlet; step S3: the residual core sand in the sand leakage channel is blocked by the baffle and continuously accumulates in the sand leakage channel to isolate heat during the annealing process; step S4: when the annealing is completed and the trolley is taken out of the furnace, the baffle at the outlet of the sand leakage channel is opened by using an operating rod to release the residual core sand into the collecting device with the bottom symmetrically provided pulleys; step S5: the collecting device is dragged to the outside of the trolley by using the operating rod and is transported to the recycling system by a transportation device for treatment.

[0006] Further improvement of the technical scheme of the present application is that in step S1, at least two sand leakage holes are arranged around the plug-in stop wheel, and a fine mesh steel grating plate is arranged on the sand leakage hole to match the size of the residual core sand particles, and the residual core sand falls into the sand leakage hole through the fine mesh steel grating plate.

[0007] Further improvement of the technical scheme of the present application is that in step S2, the sand leakage passage comprises a sand leakage section with a small upper part and a large lower part arranged at the bottom of the sand leakage hole, a buffer section connected with the lower part of the sand leakage section and arranged downwardly and outwardly of the trolley, and a sand outlet connected with the buffer section and close to the outer side of the trolley, and the sand outlet is slidingly connected with the baffle.

[0008] Further improvement of the technical scheme of the present application is that the buffer section is arranged in an arc shape and extends along the length direction of the trolley and is arranged downwardly and outwardly of the trolley.

[0009] Further improvement of the technical scheme of the present application is that the upper and lower sides of the sand outlet and the baffle are respectively provided with a pulley and a slide rail matched with each other, and one side of the baffle facing the outer side of the sand outlet is provided with a clamping groove matched with the operating rod.

[0010] Further improvement of the technical scheme of the present application is that one end of the operating rod is provided with a connecting end capable of clamping in the clamping groove to drive the baffle to slide relative to the sand outlet, the other end is provided with a pulling end matched with the collecting device to drive the collecting device to move, and a heat insulation sleeve is arranged in the middle of the operating rod.

[0011] Further improvement of the technical scheme of the present application is that in step S5, a plurality of pull rings are arranged circumferentially on the collecting device, and the pulling end of the operating rod is provided with a metal hook capable of hooking the pull ring.

[0012] Due to the adoption of the above technical scheme, the present application has the following technical progress: the sand leakage hole and the sand leakage passage matched with each other arranged around the plug-in stop wheel can effectively prevent the accumulation of residual core sand around the plug-in stop wheel during the annealing process of the casting pipe, ensure that the plug-in stop wheel is not damaged, ensure the quality of the casting pipe, avoid the high-temperature roasting of the operator, and improve the efficiency and effect of cleaning the residual core sand.

[0013] The sand leakage passage of the present application adopts a three-section structure, the sand leakage section with a small upper part and a large lower part expands the sand storage space, the buffer section arranged downwardly and outwardly of the trolley reduces the speed of the residual core sand when sliding in the passage, avoids the damage of the baffle at the passage outlet caused by the impact of high-temperature residual core sand, and the sand outlet close to the outer side of the trolley facilitates the collection and transportation of the residual core sand.

[0014] The movable collecting device and the operating rod matched with each other in the present application can be pulled out by the operator without approaching the trolley, which can avoid the high-temperature roasting of the operator after the trolley is discharged, and reduce the labor of the operator. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a side view structural schematic diagram of the annealing furnace trolley of the present application;

[0016] Figure 2 is a front view structural schematic diagram of the annealing furnace trolley of the present application;

[0017] Figure 3 is a top view structural schematic diagram of the annealing furnace trolley of the present application;

[0018] Figure 4 is a structural schematic diagram of the operating rod of the present application;

[0019] wherein, 1, trolley, 2, cast pipe, 3, residual core sand, 4, socket check wheel, 5, sand leakage hole, 6, baffle, 7, sand leakage channel, 8, operating rod, 9, collecting device, 5-1, fine mesh steel grating plate, 6-1, clamping groove, 7-1, sand leakage section, 7-2, buffer section, 7-3, sand outlet, 8-1, connecting end, 8-2, dragging end, 8-3, metal hook, 9-1, pulley, 9-2, pull ring. DETAILED DESCRIPTION

[0020] The present application will be further described in detail below in combination with examples:

[0021] A cleaning method of residual core sand of an annealing furnace trolley, comprising the following operation steps:

[0022] Step S1: when the trolley 1 enters the furnace for annealing, the cast pipe 2 is placed on the symmetrical supporting wheel set arranged on the trolley 1 and is driven to rotate by the supporting wheel set, and the residual core sand 3 inside the cast pipe 2 rotates gradually and falls into the sand leakage hole 5 arranged around the socket check wheel 4 and penetrating through the trolley 1, wherein at least two sand leakage holes 5 are arranged around the socket check wheel 4, and a fine mesh steel grating plate 5-1 adapted to the particle size of the residual core sand 3 is arranged on each sand leakage hole 5, so that the residual core sand falls into the sand leakage hole 5 through the fine mesh steel grating plate 5-1.

[0023] Step S2: the residual core sand 3 in the sand leakage hole 5 slides into the sand leakage channel 7 connected with the sand leakage hole 5, the sand leakage channel 7 is downwardly inclined towards the outside of the trolley 1 and is closed by the baffle 6, the sand leakage channel 7 can be adjusted according to the requirement during operation, one sand leakage channel 7 can be arranged below all the sand leakage holes 5 or one sand leakage channel 7 can be arranged below each sand leakage hole 5, wherein the sand leakage channel 7 comprises a sand leakage section 7-1 with a small upper part and a large lower part arranged at the bottom of the sand leakage hole 5, a buffer section 7-2 downwardly inclined towards the outside of the trolley 1 connected with the lower part of the sand leakage section 7-1, and a sand outlet 7-3 close to the outside of the trolley 1 connected with the buffer section 7-2, preferably, the buffer section 7-2 is arranged in an arc shape, the buffer section 7-2 extends a certain length along the length direction of the trolley 1 at the bottom of the trolley 1 and is downwardly inclined towards the outside of the trolley 1, so that the buffer section 7-2 has a certain length at the bottom of the trolley 1, the sand leakage section 7-1 with a small upper part and a large lower part can expand the sand storage space of the channel, the arc-shaped buffer section 7-2 inclined towards the outside of the trolley 1 reduces the sliding speed of the residual core sand 3 in the channel, avoiding the damage of the baffle 6 at the outlet of the channel directly impacted by the high-temperature residual core sand 3, and the sand outlet 7-3 close to the outside of the trolley 1 is convenient for the collection and transportation of the residual core sand 3.

[0024] The sand outlet 7-3 and the upper and lower sides of the baffle 6 are respectively provided with mutually matched pulleys and sliding rails, one side of the baffle 6 towards the outside of the sand outlet 7-3 is provided with a clamping groove 6-1 matched with the operating rod 8, one end of the operating rod 8 is provided with a connecting end 8-1 capable of clamping the clamping groove 6-1, the connecting end 8-1 of the operating rod 8 can be clamped in the clamping groove 6-1 to drive the baffle 6 to slide relative to the sand outlet 7-3 to open or close the sand outlet 7-3, the other end of the operating rod 8 is provided with a trailing end 8-2 matched with the collecting device 9 to drive the collecting device 9 to move, and a heat insulation rubber sleeve is arranged in the middle of the operating rod 8 to insulate the heat generated after the operating rod 8 contacts the trolley 1.

[0025] Step S3: the residual core sand 3 in the sand leakage channel 7 is blocked by the baffle 6 and continuously accumulates and stays in the sand leakage channel 7 to insulate heat during the annealing process, avoiding the high-temperature burn of the operator when opening the baffle 6.

[0026] Step S4: the trolley 1 is discharged after the annealing is completed, the operator clamps the connecting end 8-1 of the operating rod in the clamping groove 6-1 of the baffle through the heat insulation rubber sleeve of the operating rod 8 to open the baffle 6 at the sand outlet 7-3 and release the residual core sand 3 into the collecting device 9, the pulleys 9-1 capable of driving the collecting device 9 to move are symmetrically arranged at the bottom of the collecting device 9, the length of the operating rod 8 is set to be more than 2 meters, so that the operator is separated from the trolley 1 by a certain distance to avoid high-temperature roasting.

[0027] Step S5: the collecting device 9 is provided with a plurality of pull rings 9-2 in the circumferential direction, the trailing end 8-2 of the operating rod is provided with a metal hook 8-3 capable of hooking the pull ring 9-2, and the operating personnel hooks the metal hook 8-3 provided at the trailing end of the operating rod in the pull ring 9-2 of the collecting device 9 by holding the heat-insulating rubber sleeve of the operating rod 8 and drags it, drags the collecting device 9 out of the trolley 1 and transports it to the recycling system for recycling and reuse, which is energy-saving and environmentally friendly and reduces consumption.

[0028] The materials of the baffle 6, the sand leakage channel 7, the operating rod 8, the collecting device 9 and the fine-mesh steel grating plate 5-1 in the application are heat-resistant steel or other materials with heat-resistant performance.

[0029] It can be understood that the application is described by some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to the features and embodiments without departing from the spirit and scope of the application. In addition, the features and embodiments can be modified to adapt to specific conditions and materials under the guidance of the application without departing from the spirit and scope of the application. Therefore, the application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the application belong to the scope of protection of the application.

Claims

1. A method for cleaning residual core sand from an annealing furnace trolley, characterized in that: The following steps are included: Step S1: When the trolley (1) enters the furnace for annealing, the residual core sand (3) inside the casting tube (2) gradually falls into the sand leakage hole (5) around the insert stop wheel (4), which is only able to let the residual core sand (3) pass through. Step S2: The residual core sand (3) in the sand leakage hole (5) slides into the sand leakage channel (7) connected to the sand leakage hole (5). The sand leakage channel (7) is set to slope downward towards the outside of the trolley (1) and the outlet is closed by the baffle (6). Step S3: The residual core sand (3) in the sand leakage channel (7) is blocked by the baffle (6) and continuously accumulates in the sand leakage channel (7) during the annealing process to insulate against heat; Step S4: After the annealing is finished, the trolley (1) is taken out of the furnace. The baffle (6) at the outlet of the sand leakage channel (7) is opened using the operating lever (8) to release the residual core sand (3) into the collection device (9) with symmetrical pulleys (9-1) at the bottom. Step S5: Use the lever (8) to drag the collection device (9) outside the trolley (1) and transport it to the recycling system for processing by the transport device.

2. The method for cleaning residual core sand from an annealing furnace trolley according to claim 1, characterized in that: In step S1, at least two sand-leaking holes (5) through the trolley are provided around the insertion stop wheel (4). The sand-leaking holes (5) are provided with fine mesh steel grid plates (5-1) that are adapted to the particle size of the residual core sand (3). The residual core sand (3) falls into the sand-leaking holes (5) through the fine mesh steel grid plates (5-1).

3. The method for cleaning residual core sand from an annealing furnace trolley according to claim 2, characterized in that: In step S2, the sand leakage channel (7) includes a sand leakage section (7-1) with a smaller upper part and a larger lower part set at the bottom of the sand leakage hole (5), a buffer section (7-2) connected to the lower part of the sand leakage section (7-1) and inclined downward toward the outside of the trolley (1), and a sand outlet (7-3) connected to the buffer section (7-2) and close to the outside of the trolley (1). The sand outlet (7-3) is slidably connected to the baffle (6).

4. The method for cleaning residual core sand from an annealing furnace trolley according to claim 3, characterized in that: The buffer section (7-2) extends along the length of the trolley (1) at the bottom and is inclined downward toward the outside of the trolley. The buffer section (7-2) is arc-shaped.

5. The method for cleaning residual core sand from an annealing furnace trolley according to claim 4, characterized in that: The sand outlet (7-3) and the upper and lower sides of the baffle (6) are respectively provided with matching pulleys and slide rails. The side of the baffle (6) facing the sand outlet (7-3) is provided with a slot (6-1) that is compatible with the operating rod (8).

6. The method for cleaning residual core sand from an annealing furnace trolley according to claim 5, characterized in that: One end of the operating lever (8) is provided with a connecting end (8-1) that can be locked in the slot (6-1) to slide the baffle (6) relative to the sand outlet (7-3), and the other end is provided with a drag end (8-2) that cooperates with the collection device (9) to move the collection device (9). A heat insulation sleeve is provided in the middle of the operating lever (8).

7. The method for cleaning residual core sand from an annealing furnace trolley according to claim 6, characterized in that: In step S5, the collecting device (9) is provided with several pull rings (9-2) in the circumference, and the drag end (8-2) of the operating rod is provided with a metal hook (8-3) that can hook the pull rings (9-2).

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