Tap hole forcible entry device
By designing a steel outlet demolition device that utilizes the principle of pneumatic hammer, the problem of many manual operations and major safety hazards in the removal of sleeve bricks in the prior art is solved, and the automatic removal of sleeve bricks at high temperatures is achieved, which improves safety and operating efficiency.
Patent Information
- Application Number
- CN202420799348.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-04-17
AI Technical Summary
In the prior art, a large amount of manual operation is required during the removal of sleeve bricks of steel outlets, which poses safety hazards and are labor-intensive, especially when operating in high temperature environments, which is even more dangerous.
A steel outlet demolition device is designed, using the principle of a pneumatic hammer. Through the reciprocating movement of the pneumatic hammer, the impact crushing chisel on the positioning drill rod is driven to apply crushing and impact to the sleeve bricks, thereby automatically removing the sleeve bricks at high temperatures.
It greatly reduces the number of manual operations, improves operation safety, reduces the intensity of manual operations, and realizes automatic dismantling in high-temperature environments, avoiding manual direct contact with high-temperature areas.
Smart Images
Figure CN222849772U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field related to electric furnace maintenance equipment, and specifically relates to a steel outlet demolition device which can greatly reduce the manual operation in the process of removing sleeve bricks of the steel outlet, improve safety, and reduce the intensity of manual operation. Background Art
[0002] The tapping port of the eccentric bottom steel-tapping electric furnace in an electric furnace steelmaking plant is an opening through the bottom of the furnace, which is used to allow the liquid molten steel in the furnace to be discharged from the furnace. The lining of the electric furnace is all refractory materials, and the refractory materials of the tapping port are composed of sleeve bricks, caulking materials, surrounding bricks, etc.; the surrounding bricks of the tapping port are composed of special refractory materials, and the shell of the electric furnace is usually welded from steel plates, and its interior is lined with refractory materials; the tapping port is composed of a single slender tapping port, which is composed of sleeve bricks or multiple axially aligned shorter sleeve bricks; the sleeve bricks of magnesium-carbon refractory materials form the tapping port along the axis, and the gap between them and the surrounding bricks is filled with mortar, castables or ramming materials. The molten steel, slag and other impurities flowing through the tapping port are scouring and corrosive, and eventually wear the inner hole of the sleeve bricks of the tapping port until there is not enough wall thickness to maintain the regular flow of liquid molten steel. In order to prevent the liquid molten steel from damaging the furnace shell and endangering the safety of other equipment or personnel when passing through the sleeve bricks, the sleeve bricks need to be removed and replaced at this time.
[0003] At present, the sleeve bricks, cold steel and caulking materials at the steel outlet are usually removed by operators using portable pneumatic picks. The workers are in an unsafe working environment, the labor intensity is high and a lot of electric furnace smelting production time is consumed. In addition, due to energy cost reasons, the electric furnace is not allowed to cool down. In order to increase the steel output of the electric furnace, the sleeve bricks, cold steel and ramming materials at the steel outlet are removed while the furnace is still hot. At this time, the temperature inside the furnace often exceeds 1000℃, which is a highly dangerous working condition for the workers who remove the sleeve bricks at the steel outlet.
[0004] To this end, we have developed a steel outlet demolition device that can greatly reduce the manual operation during the removal of the sleeve bricks at the steel outlet, improve safety, and reduce the intensity of manual operation. Summary of the invention
[0005] The utility model aims to provide a steel outlet demolition device which can greatly reduce the manual operation in the process of removing the sleeve bricks of the steel outlet, improve the safety and reduce the intensity of manual operation.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steel outlet demolition device, comprising a pneumatic hammer; the pneumatic hammer comprises a piston rod; a counterweight piston is arranged on the outside of the piston rod along its length direction; an air inlet channel is arranged inside the piston rod, and when gas enters the air inlet channel, the counterweight piston can reciprocate along the length direction of the piston rod; a positioning drill rod is arranged at the lower end of the piston rod; the positioning drill rod is arranged parallel to the piston rod; an impact crushing chisel is sleeved on the positioning drill rod; when working, the positioning drill rod is inserted into the through hole surrounded by sleeve bricks at the steel outlet of the eccentric bottom steel-out furnace for positioning, and when the reciprocating motion of the counterweight piston drives the positioning drill rod to vibrate up and down, the impact crushing chisel can hit the sleeve brick.
[0007] Preferably, a lower limit block is provided at the lower part of the piston rod; the lower limit block is arranged around the piston rod; the lower limit block is fixed to the lower part of the piston rod by a first positioning pin; the first positioning pin is also arranged through the piston rod; the lower end part of the counterweight piston can contact the lower limit block, and when working, the counterweight piston can intermittently and reciprocatingly knock the lower limit block, thereby driving the positioning drill rod to vibrate reciprocatingly up and down.
[0008] Preferably, the positioning drill rod is arranged concentrically with the piston rod.
[0009] Preferably, the positioning drill rod and the piston rod are fixedly connected via a second positioning pin.
[0010] Preferably, an adapter is provided at the outer end of the air inlet passage; the adapter is located in the middle of the top of the piston rod; the adapter is used to communicate with an external pressurized air source; the external pressurized air source is generally compressed air or nitrogen.
[0011] Preferably, lifting ears are symmetrically arranged on the top of the piston rod to facilitate lifting.
[0012] Preferably, the pneumatic hammer is externally sleeved with an outer shell; the lower limit block is fixed to the lower part of the outer shell by a first positioning pin; a connecting plate is provided on the upper part of the piston rod to seal the gap between the upper part of the outer shell and the piston rod; the counterweight piston is located in a confined space between the piston rod and the outer shell; the counterweight piston can move in the confined space; the positioning drill rod at least partially extends out of the outer shell; exhaust holes are evenly distributed on the outer wall of the outer shell; the exhaust holes are connected to the confined space so that the gas entering the confined space can be discharged.
[0013] Preferably, all of the positioning drill rods are located outside the housing.
[0014] Preferably, the pneumatic hammer is an elongated body, the piston rod is also an elongated body, and a weighted piston is provided on the periphery of the piston rod. The weighted piston is a cylindrical sleeve that can be driven by gas pressure to reciprocate along the piston rod.
[0015] Preferably, the adapter is connected to the upper end of the piston rod and is used to connect to an external air intake high-pressure hose, which is connected to an external pressurized air source; the external pressurized air source is connected to an oil mist collector, which automatically sprays lubricating oil mist into the air intake high-pressure hose at a fixed time to ensure sufficient lubrication between the counterweight piston and the piston rod.
[0016] Compared with the prior art, the utility model provides a steel outlet breaking device, which has the following beneficial effects:
[0017] The tapping port demolition device described in the utility model utilizes the reciprocating motion of a pneumatic hammer to apply crushing and impact action to the sleeve bricks of the tapping port, thereby removing the sleeve bricks from the tapping port of an eccentric bottom tapping electric furnace; and can be operated in a furnace maintained at a high temperature; and does not require manual operation near the sleeve bricks; the tapping port demolition device described in the utility model also includes a protective cover, in which the pneumatic hammer is covered and is not affected by the higher furnace temperature; the tapping port demolition device described in the utility model can also use the airflow from the pneumatic hammer to maintain cooling thereon. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0019] Figure 1 This is a schematic diagram of the application state of a steel outlet breaking device proposed by the utility model;
[0020] Figure 2 for Figure 1 Enlarged view of part A in the middle;
[0021] Figure 3 This is a schematic enlarged diagram of the second state of a steel outlet breaking device proposed by the utility model;
[0022] In the figure: 1. outer shell; 2. connecting plate; 3. piston rod; 4. counterweight piston; 5. positioning drill rod; 6. adapter; 7. first positioning pin; 8. impact crushing chisel; 9. lifting ear; 10. lower limit block; 11. second positioning pin; 12. refractory material; 13. sleeve brick; 14. surrounding brick; 15. exhaust hole. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0024] See also Figure 1-3 The utility model provides a technical solution: a steel outlet demolition device, including a pneumatic hammer (not marked); the pneumatic hammer includes a piston rod 3; the piston rod 3 is provided with a counterweight piston 4 on the outside along its length direction; an air inlet channel (not marked) is provided inside the piston rod 3, and when gas enters the air inlet channel, the counterweight piston 4 can reciprocate along the length direction of the piston rod 3; a positioning drill rod 5 is provided at the lower end of the piston rod 3; the positioning drill rod 5 is arranged parallel to the piston rod 3; in this embodiment, the positioning drill rod 5 is arranged concentrically with the piston rod 3; the positioning drill rod The rod 5 is fixedly connected to the piston rod 3 by a second positioning pin 11; an impact crushing chisel 8 is sleeved on the positioning drill rod 5; when working, the positioning drill rod 5 is inserted into the through hole surrounded by the sleeve bricks 13 at the steel outlet of the eccentric bottom steel-making electric furnace for positioning, and when the reciprocating motion of the counterweight piston 4 drives the positioning drill rod 5 to vibrate up and down, the impact crushing chisel 8 can hit the sleeve brick 13; a lower limit block 10 is provided at the lower part of the piston rod 3; the lower limit block 10 is arranged around the piston rod 3; the lower limit block 10 is fixed to the lower part of the piston rod 3 by the first positioning pin 7; the first positioning The pin 7 is also set through the piston rod 3; the lower end of the counterweight piston 4 can contact the lower limit block 10. When working, the counterweight piston 4 can intermittently and reciprocatingly knock the lower limit block 10, thereby driving the positioning drill rod 5 to vibrate up and down; the outer end of the air inlet channel is provided with an adapter 6; the adapter 6 is located in the middle of the top of the piston rod 3; the adapter 6 is used to communicate with an external pressurized air source; the external pressurized air source is generally compressed air or nitrogen; the top of the piston rod 3 is symmetrically provided with lifting ears 9 to facilitate lifting; the outer sleeve of the pneumatic hammer is provided with a shell 1; The lower limit block 10 is fixed to the lower part of the shell 1 by the first positioning pin 7; a connecting plate 2 is provided on the upper part of the piston rod 3 to block the gap between the upper part of the shell 1 and the piston rod 3; the counterweight piston 4 is located in the enclosed space between the piston rod 3 and the shell 1; the counterweight piston 4 can move in the enclosed space; the positioning drill rod 5 at least partially extends out of the shell 1; in this embodiment, the positioning drill rod 5 is entirely located outside the shell 1; exhaust holes 15 are evenly distributed on the outer wall of the shell 1; the exhaust holes 15 are connected to the enclosed space so that the gas entering the enclosed space can be discharged.
[0025] The innermost part of the steel outlet of the eccentric bottom steel-discharging electric furnace is a through hole surrounded by sleeve bricks 13 ; the outer side of the sleeve bricks 13 is a surrounding brick 14 ; the outer side of the surrounding brick 14 is a refractory material 12 .
[0026] In this embodiment, the pneumatic hammer has a slender body, and can drive the counterweight piston 4 to move back and forth along the length direction of the piston rod by gas pressure, thereby driving the entire machine to jump longitudinally; the steel outlet demolition device is divided into a first section and a second section, the first section has a pneumatic hammer for receiving an inlet from an external gas source, the pneumatic hammer is connected to the second section through a second positioning pin 11, the second section is a positioning drill rod 5 and an impact crushing chisel 8, which is arranged to be placed on the upper end of the sleeve brick 13, the positioning drill rod 5 extends from the outer shell 1, the outer diameter of the positioning drill rod 5 is the same as or slightly smaller than the inner diameter of the through hole surrounded by the sleeve brick 3, and the size of the impact crushing chisel 8 is slightly smaller than the inner hole of the steel outlet surrounding brick 14; the outer shell 1 surrounds the piston rod 3 and forms a protective cover around it, and an exhaust hole 15 is arranged at the upper end of the protective cover to allow the gas from the outer shell 1 to be discharged; the outer shell 1 is made of stainless steel pipe.
[0027] In this embodiment, the steel outlet demolition device is located relative to the sleeve brick 13 of the steel outlet; the sleeve brick 13 is a part of the refractory material of the steel outlet; the innermost part of the steel outlet is a through hole surrounded by the sleeve bricks 13; the outer side of the sleeve brick 13 is the surrounding brick 14; the outer side of the surrounding brick 14 is the refractory material 12.
[0028] The pneumatic hammer is a slender body, and the piston rod 3 is also a slender body. The periphery of the piston rod 3 is equipped with a counterweight piston 4, and the counterweight piston 4 is a cylindrical sleeve that can be driven by gas pressure to reciprocate along the piston rod 3; the lower end of the piston rod 3 is equipped with a lower limit block 10, and the lower limit block 10 is connected to the piston rod 3 through a first locating pin 7; the outer shell 1 and the connecting plate 2 can cooperate to prevent refractory debris generated by impact during work from entering the inside of the pneumatic hammer; the adapter 6 is connected to the upper end of the piston rod 3 through a thread, and is used to connect to an external air intake high-pressure hose (not marked), and the air intake high-pressure hose is connected to an external pressurized air source.
[0029] The lifting lug 9 is used for lifting when the steel outlet demolition device is working.
[0030] The impact crushing chisel 8 is tightly connected to the positioning drill rod 5 and is locked with screws to prevent the positioning drill rod 5 from falling off during work; the positioning drill rod 5 and the impact crushing chisel 8 are made of special high-temperature resistant and high-strength materials to prevent damage caused by high temperature during work; the positioning drill bit 5 is connected to the lower end of the piston rod 3 through a second positioning pin 11.
[0031] As attached Figure 3As shown, the intake high-pressure hose is connected to an external pressurized air source, and the external pressurized air source is connected to an oil mist device (not shown). The oil mist device automatically sprays lubricating oil mist into the intake high-pressure hose at a fixed time to ensure sufficient lubrication between the counterweight piston 4 and the piston rod 3; the external air source carries the lubricating oil mist to flow in the direction of the arrow to drive the counterweight piston 4 to move upward; Figure 2 It indicates that the air intake high-pressure hose is connected to an external pressurized air source, and the external pressurized air source flows in the direction of the arrow to drive the counterweight piston 4 to move downward. Driven by the external pressurized air source, the counterweight piston 4 produces rapid reciprocating motion, thereby driving the device to move up and down, and utilizing the device's own weight and the impact of high-pressure air to generate an impact force to smash the sleeve brick 13.
[0032] When in use, the device is hung on the lifting lug 9 by a hook or chain, and is suspended by an overhead crane or a traveling crane or a conveyor (not shown), so that the device is vertically downward, and the air intake high-pressure hose is connected to an external pressurized air source, which is usually present in industrial equipment to operate a pneumatic hammer; when the steel outlet breaking device is suspended by an overhead crane, the steel outlet breaking device is presented as shown in FIG1 The vertical state shown; the positioning drill rod 5 is aligned with the through hole surrounded by the sleeve bricks 13 by means of a bridge crane; the device is then lowered until the lower surface of the impact crushing chisel 8 abuts against the upper edge of the sleeve brick 13, and then, the external pressurized gas is guided through the air inlet high-pressure hose to make the counterweight piston 4 on the pneumatic hammer reciprocate along the piston rod 3, thereby causing the sleeve brick 13 at the steel outlet to produce impact movement and vibration; the weight of the steel outlet demolition device vibrates together with the impact movement of the pneumatic hammer and loosens the sleeve brick 13, thereby releasing the sleeve brick 13 from the surrounding brick 14; in addition, the exhaust hole 15 can discharge gas, thereby generating an airflow in the outer shell 1, which keeps the temperature in the outer shell 1 much lower than the temperature of the surrounding interior of the steelmaking furnace; at the same time, the same gas that drives and operates the pneumatic hammer can also cool the protective cover surrounding the pneumatic hammer to prevent the high temperature in the furnace from adversely affecting the operation of the pneumatic hammer.
[0033] Compared with the prior art, the utility model has the following beneficial effects:
[0034] The tapping port demolition device described in the utility model utilizes the reciprocating motion of a pneumatic hammer to apply crushing and impact action to the sleeve bricks of the tapping port, thereby removing the sleeve bricks from the tapping port of an eccentric bottom tapping electric furnace; and can be operated in a furnace maintained at a high temperature; and does not require manual operation near the sleeve bricks; the tapping port demolition device described in the utility model also includes a protective cover, in which the pneumatic hammer is covered and is not affected by the higher furnace temperature; the tapping port demolition device described in the utility model can also use the airflow from the pneumatic hammer to maintain cooling thereon.
[0035] The above description is a specific embodiment of the present invention; the description of this embodiment is only for illustrative purposes, and many changes and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the present invention; for example, although the tapping port demolition device described in the present invention is depicted and described as being vertically suspended on a bridge crane for removing the sleeve bricks 13 of the tapping port from the furnace, the device can be installed or supported in different directions by other mechanical devices (such as forklifts, etc.) and used from outside the furnace; other materials are cited to replace the positioning drill rod 5, impact crushing chisel 8, etc.; it is intended to include all such modifications and changes as long as they fall within the scope of the claimed invention or its equivalent.
Claims
1. A tapping hole breaking device, characterized in that: It comprises a pneumatic hammer; the pneumatic hammer comprises a piston rod; a counterweight piston is arranged on the outside of the piston rod along the length direction thereof; an air inlet passage is arranged inside the piston rod, and when gas enters the air inlet passage, the counterweight piston can reciprocate along the length direction of the piston rod; a positioning drill rod is arranged at the lower end of the piston rod; the positioning drill rod is arranged parallel to the piston rod; an impact crushing chisel is sleeved on the positioning drill rod; when working, the positioning drill rod is inserted into the through hole surrounded by sleeve bricks at the steel outlet of the eccentric bottom steel-tapping electric furnace for positioning, and when the reciprocating motion of the counterweight piston drives the positioning drill rod to vibrate reciprocatingly up and down, the impact crushing chisel can hit the sleeve brick.
2. A tapping hole breaking device according to claim 1, characterized in that: A lower limit block is arranged at the lower part of the piston rod; the lower limit block is arranged around the piston rod; the lower limit block is fixed to the lower part of the piston rod by a first positioning pin; the first positioning pin is also arranged through the piston rod; the lower end part of the counterweight piston can contact the lower limit block, and when working, the counterweight piston can intermittently and reciprocatingly knock the lower limit block, thereby driving the positioning drill rod to vibrate reciprocatingly up and down.
3. A steel outlet breaking device according to claim 1, characterized in that: The positioning drill rod is arranged concentrically with the piston rod.
4. A steel outlet breaking device according to claim 1, characterized in that: The positioning drill rod and the piston rod are fixedly connected via a second positioning pin.
5. The steel outlet breaking device according to claim 1, characterized in that: An adapter is provided at the outer end of the air inlet passage; the adapter is located in the middle of the top of the piston rod; the adapter is used to communicate with an external pressurized air source; the external pressurized air source is generally compressed air or nitrogen.
6. A steel outlet breaking device according to claim 1, characterized in that: The top of the piston rod is symmetrically provided with lifting ears to facilitate lifting.
7. A tap hole breaking device according to claim 2, characterized in that: The pneumatic hammer is externally sleeved with a shell; the lower limit block is fixed to the lower part of the shell by a first positioning pin; a connecting plate is provided on the upper part of the piston rod to block the gap between the upper part of the shell and the piston rod; the counterweight piston is located in a closed space between the piston rod and the shell; the counterweight piston can move in the closed space; the positioning drill rod at least partially extends out of the shell; exhaust holes are evenly distributed on the outer wall of the shell; the exhaust holes are connected to the closed space so that the gas entering the closed space can be discharged.
8. A tap hole breaking device according to claim 7, characterized in that: The positioning drill rods are all located outside the shell.
9. The steel outlet breaking device according to claim 1, characterized in that: The pneumatic hammer is a slender body, and the piston rod is also a slender body. The periphery of the piston rod is equipped with a counterweight piston. The counterweight piston is a cylindrical sleeve that can be driven by gas pressure to reciprocate along the piston rod.
10. The steel outlet breaking device according to claim 5, characterized in that: The adapter is connected to the upper end of the piston rod and is used to connect to an external air intake high-pressure hose, which is connected to an external pressurized air source; the external pressurized air source is connected to an oil mist collector, which automatically sprays lubricating oil mist into the air intake high-pressure hose at a regular interval to ensure sufficient lubrication between the counterweight piston and the piston rod.