Oxygen lance clamp and nozzle preheating system for nozzle preheating

Abstract

The application belongs to the technical field of steel metallurgical equipment, and discloses an oxygen lance clamp for nozzle preheating and a nozzle preheating system, wherein the oxygen lance clamp comprises a shell, a clamping device, an oxygen connecting pipe and a nitrogen connecting pipe; the clamping device and the oxygen connecting pipe are arranged in the shell, and the oxygen connecting pipe is connected with the clamping device; the nitrogen connecting pipe is connected to the surface of the shell; the surface of the shell is provided with a through hole for inserting an oxygen lance pipe and clamping the oxygen lance pipe by the clamping device; and the oxygen lance pipe is connected with the oxygen connecting pipe after passing through the clamping device. The oxygen lance clamp for nozzle preheating and the nozzle preheating system can solve the problem that high temperature will cause adverse effects on the electrical lines in the clamp and even damage the electrical lines and electrical appliances.

Description

An oxygen lance holder and a sprue burning system for sprue burning Technical Field

[0001] This invention relates to the field of iron and steel metallurgical equipment technology, and more specifically to an oxygen lance clamp and a sprue burning system for sprue burning. Background Technology

[0002] In hot steel repair operations, an oxygen lance is used to burn the blocked drain nozzle, burning the solidified slag inside into molten steel so that it can flow out smoothly for the next batch of molten steel. Currently, most methods of burning the drain nozzle involve manual operation with the oxygen lance, which poses a significant safety hazard to workers due to splashing molten steel and the risk of backfire during oxygen blowing. Some solutions utilize robots to hold the oxygen lance for this purpose. To increase robot utilization, multiple quick-change fixtures are typically designed for connection, allowing a single robot to change fixtures according to different procedures. However, the high temperatures during nozzle burning can adversely affect the fixtures and electrical wiring, potentially damaging them. Therefore, high-temperature protection is necessary for the fixtures and their internal wiring and components. Summary of the Invention

[0003] To address the problem that high temperatures can adversely affect or even damage electrical circuits and appliances within the fixture, this invention provides an oxygen lance fixture and a sprue burning system for sprue burning.

[0004] To solve the above-mentioned technical problems, the present invention provides an oxygen lance clamp and a sprue burning system for sprue burning. The oxygen lance clamp includes a housing, a clamping device, an oxygen connecting pipe, and a nitrogen connecting pipe. The clamping device and the oxygen connecting pipe are both disposed inside the housing, and the oxygen connecting pipe is connected to the clamping device. The nitrogen connecting pipe is connected to the surface of the housing. The surface of the housing has a through hole for inserting the oxygen lance tube and clamping it by the clamping device. The oxygen lance tube is connected to the oxygen connecting pipe after passing through the clamping device.

[0005] In an embodiment of the present invention, the housing includes a first accommodating space and a second accommodating space, and a heat insulation plate is provided between the first accommodating space and the second accommodating space. The clamping device is disposed in the first accommodating space, and the oxygen connecting pipe is disposed in the second accommodating space and connected to the clamping device.

[0006] In an embodiment of the present invention, a quick-change female disk is provided in the second accommodating space, the connecting surface of the quick-change female disk is flush with the outer surface of the second accommodating space away from the first accommodating space, and the clamping device is electrically connected to the quick-change female disk and integrates a signal jack on the outer surface of the quick-change female disk.

[0007] In an embodiment of the present invention, a connecting plate is fixed on the heat insulation plate, the oxygen connecting pipe and the clamping device are respectively fixedly connected to both sides of the connecting plate, the nitrogen connecting pipe is located in the second accommodating space and connected to the connecting plate, and the connecting plate is provided with cooling holes that connect the first accommodating space and the second accommodating space.

[0008] In an embodiment of the present invention, the clamping device includes a chuck base and three jaws. The chuck base is fixedly connected to the connecting disk, and the center of the chuck base is concentric with the through hole. The three jaws are evenly distributed around the center of the chuck.

[0009] In an embodiment of the present invention, a first connecting flange and a second connecting flange are fixed at both ends of the oxygen connecting pipe, the first connecting flange being connected to the connecting disc and the second connecting flange being connected to the quick-change female disc.

[0010] In an embodiment of the present invention, a protruding connecting sleeve is provided on the side of the first connecting flange away from the second connecting flange for the oxygen lance tube to be fitted. The connecting sleeve communicates with the oxygen connecting pipe through the first connecting flange, and a sealing gasket is provided inside the connecting sleeve.

[0011] In an embodiment of the present invention, a flashback valve is provided on the oxygen connecting pipe, and the oxygen connecting pipe is connected to an external oxygen source through the flashback valve.

[0012] In an embodiment of the present invention, the outer surface of the housing is covered with a heat insulation sheet, and the inner surface of the housing is provided with a heat-conducting sheet.

[0013] To solve the above-mentioned technical problems, the present invention also provides a sprue burning system, the sprue burning system including a robot and the above-mentioned oxygen lance clamp, wherein the end of the robot is provided with a connector that connects to the housing.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: by connecting the oxygen connecting pipe to the clamping device, the oxygen lance tube is connected to the oxygen connecting pipe after the clamping device clamps the oxygen lance tube, thereby enabling the oxygen lance tube to blow oxygen to burn the steel slag in the outlet. By connecting the nitrogen connecting pipe to the surface of the shell, nitrogen is blown into the shell through the nitrogen connecting pipe to cool it during the outlet burning operation, preventing the high temperature generated during outlet burning from adversely affecting the electrical circuits or electrical appliances inside the shell. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 is a three-dimensional structural schematic diagram of an oxygen lance clamp provided in an embodiment of the present invention;

[0017] Figure 2 is a frontal explosion structure diagram of an oxygen lance clamp provided in an embodiment of the present invention;

[0018] Figure 3 is an enlarged view of point A in Figure 2;

[0019] Figure 4 is a schematic diagram of the back explosion structure of an oxygen lance clamp provided in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures

[0021] 1. Oxygen lance clamp; 11. Housing; 12. Clamping device; 13. Oxygen connecting pipe; 14. Nitrogen connecting pipe; 111. First receiving space; 112. Second receiving space; 113. Through hole; 114. Heat insulation plate; 115. Quick-change female plate; 116. Signal socket; 117. Connecting plate; 118. Cooling hole; 119. Heat insulation sheet; 110. Heat conducting sheet; 121. Chuck seat; 122. Clamping jaw; 131. First connecting flange; 132. Second connecting flange; 133. Connecting sleeve; 134. Flashback valve; 2. Oxygen lance tube. Detailed Implementation

[0022] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] The present invention provides an oxygen lance fixture for sprue burning, which can cool down the electrical circuits and electrical components inside the fixture, and avoid adverse effects on the electrical circuits and electrical components due to excessive temperature inside the fixture.

[0024] As shown in Figures 1-4, an oxygen lance clamp 1 for sprue burning includes a housing 11, a clamping device 12, an oxygen connecting pipe 13, and a nitrogen connecting pipe 14. The clamping device 12 and the oxygen connecting pipe 13 are both disposed inside the housing 11, and the oxygen connecting pipe 13 is connected to the clamping device 12. The nitrogen connecting pipe 14 is connected to the surface of the housing 11. A through hole 113 is provided on the surface of the housing 11 for inserting the oxygen lance tube 2 and clamping it by the clamping device 12. The oxygen lance tube 2 is connected to the oxygen connecting pipe 13 after passing through the clamping device 12.

[0025] When using the oxygen lance clamp 1 to hold the oxygen lance tube 2 for nozzle burning, the oxygen lance clamp 1 is connected to the robot, and the oxygen lance tube 2 is inserted into the housing 11 through the through hole 113 and the clamping device 12 holds the oxygen lance tube 2. After the clamping device 12 holds the oxygen lance tube 2, it is connected to the oxygen connecting pipe 13 so that oxygen is input into the oxygen lance tube 2 through the oxygen connecting pipe 13 and sprayed out from the other end of the oxygen lance tube 2. The sprayed oxygen achieves the effect of oxygen blowing and combustion when it encounters an open flame. Then, when the robot moves the oxygen lance tube 2 to the outlet position, the steel slag in the outlet can be burned into molten steel and flow out from the outlet. Since the high temperature in the ladle will be transferred to the oxygen lance clamp 1 through the air and the oxygen lance tube 2 when the oxygen tube is used for nozzle burning, nitrogen is blown into the housing 11 through the nitrogen connecting pipe 14 to cool it. This can avoid the problem of the electrical circuits and electrical appliances in the housing 11 being damaged due to the excessive temperature inside the oxygen lance clamp 1.

[0026] Compared with the prior art, the oxygen lance clamp 1 of the present invention clamps the oxygen lance tube 2 by setting a clamping device 12 in the housing 11 and connecting the oxygen connecting pipe 13 to the clamping device 12, so that after the clamping device 12 clamps the oxygen lance tube 2, the oxygen connecting pipe 13 is connected to the oxygen lance tube 2 for the oxygen lance tube 2 to perform nozzle burning operation. By setting a nitrogen connecting pipe 14 on the surface of the housing 11, the internal nitrogen of the housing 11 is cooled by nitrogen blowing after the external nitrogen source is connected to the nitrogen connecting pipe 14, so as to avoid the situation that the temperature inside the housing 11 is too high and the electrical circuits and electrical appliances are damaged.

[0027] In an embodiment of the present invention, the housing 11 includes a first accommodating space 111 and a second accommodating space 112, and a heat insulation plate 114 is provided between the first accommodating space 111 and the second accommodating space 112. The clamping device 12 is disposed in the first accommodating space 111, and the oxygen connecting pipe 13 is disposed in the second accommodating space 112 and connected to the clamping device 12.

[0028] The interior of the housing 11 is divided into a first receiving space 111 and a second receiving space 112 by a heat insulation plate 114. The clamping device 12 is disposed in the first receiving space 111, and the oxygen connecting pipe 13 is disposed in the second receiving space 112. Thus, when the robot drives the oxygen gun clamp 1 to burn the nozzle, the heat insulation plate 114 isolates the high temperature of the first receiving space 111, preventing the high temperature in the first receiving space 111 from being transferred to the second receiving space 112 and causing damage to the electrical circuits and electrical appliances in the second receiving space 112. In case of high temperature damage, the clamping device 12 is placed in the first receiving space 111, so that the oxygen gun tube 2 can be directly clamped by the clamping device 12 after passing through the through hole 113, which is more conducive to the clamping device 12 clamping the oxygen gun tube 2. The oxygen connecting pipe 13 is placed in the second receiving space 112 and connected to the clamping device 12. This can avoid the high temperature contact between the oxygen connecting pipe 13 and the first receiving cavity, and can also allow the oxygen connecting pipe 13 to supply oxygen to the oxygen gun tube 2, so that the robot can drive the oxygen gun tube 2 to perform normal sprue burning operation.

[0029] In the above embodiment, the heat insulation plate 114 is a ceramic plate. The first accommodating cavity and the second accommodating cavity are separated by the heat insulation plate 114. This can prevent the high temperature of the first accommodating cavity from being transmitted to the second accommodating cavity, thereby preventing the electrical circuits and electrical appliances in the second accommodating cavity from being damaged by the high temperature. It can also provide an installation position for the clamping device 12, so that the clamping device 12 can clamp the oxygen gun tube 2 to perform the sprue burning operation.

[0030] In an embodiment of the present invention, a quick-change mother plate 115 is provided in the second accommodating space 112. The connecting surface of the quick-change mother plate 115 is flush with the outer surface of the second accommodating space 112 away from the first accommodating space 111. The clamping device 12 is electrically connected to the quick-change mother plate 115 and integrates a signal jack 116 on the outer surface of the quick-change mother plate 115.

[0031] The quick-change mother plate 115 is positioned flush with the outer surface of the second accommodating space 112, thereby reducing the overall volume of the oxygen lance clamp 1. It also facilitates the connection between the robot and the oxygen lance clamp 1 via the quick-change mother plate, enabling the robot to drive the oxygen lance clamp 1 for subsequent nozzle burning operations. A signal jack 116 is integrated on the quick-change mother plate 115, and the power supply line of the clamping device 12 is connected to the signal jack 116. This allows the robot to supply power to the clamping device 12 via the signal jack 116 after connecting to the quick-change mother plate 115, thus enabling the clamping device 12 to perform normal clamping operations.

[0032] It is understood that the robot's end effector is equipped with a quick-change male plate that is compatible with the quick-change female plate 115. The quick-change male plate and quick-change female plate 115 work together to connect with the oxygen lance holder 1, facilitating quick connection and disconnection between the robot and the oxygen lance holder 1. The quick-change female plate 115 also integrates a power and air supply socket for electrical connection of the quick-change male plate. The quick-change male plate has a plug that aligns with the socket. After the quick-change male plate is inserted into the quick-change female plate 115, the plug connects to the socket, activating the electrical and pneumatic circuits within the quick-change female plate 115. At this time, the piston plate inside the quick-change female plate 115... Driven by the air circuit, the piston plate moves and causes the balls inside the quick-change female plate 115 to abut against the quick-change male plate, forming a locking engagement. The piston plate is held in its current position by the air pressure in the air circuit, thus preventing the quick-change male plate from separating from the quick-change female plate 115. By controlling the disconnection of the electrical air circuit inside the quick-change female plate 115, the piston plate can be moved away from its current position, allowing the balls to move freely. Once the balls are no longer abutting against the quick-change male plate, the quick-change male plate can be pulled out of the quick-change female plate 115, thus completing the disassembly of the quick-change male plate and the quick-change female plate 115.

[0033] Both the quick-change male and female plates 115 are equipped with a foolproof alignment design to prevent misalignment during insertion, which would prevent proper connection. The quick-change male plate is also equipped with a signal plug that connects to the signal jack 116. When the quick-change male plate is inserted into the quick-change female plate 115, the plug and the signal plug are connected to the signal jack 116, thereby connecting the quick-change female plate 115 to the robot through the quick-change male plate. The clamping device 12 receives power and gas supply under the action of the robot, so that the robot can drive the oxygen gun clamp 1 to clamp the oxygen gun tube 2.

[0034] In an embodiment of the present invention, a connecting plate 117 is fixed on the heat insulation plate 114, and the oxygen connecting pipe 13 and the clamping device 12 are respectively fixedly connected to both sides of the connecting plate 117. The nitrogen connecting pipe 14 is located in the second accommodating space 112 and connected to the connecting plate 117. The connecting plate 117 is provided with a cooling hole 118 that connects the first accommodating space 111 and the second accommodating space 112.

[0035] By providing a connecting plate 117 on the heat insulation plate 114, the clamping device 12 is fixed to the heat insulation plate 114 via the connecting plate 117. The oxygen connecting pipe 13 and the clamping device 12 are respectively fixed to both sides of the connecting plate 117. After the clamping device 12 clamps the oxygen lance tube 2, it connects to the oxygen connecting pipe 13 via the connecting plate 117, thereby supplying oxygen to the oxygen lance tube 2, enabling the oxygen lance tube 2 to perform nozzle burning operations. The nitrogen connecting pipe 14 is placed in the second receiving space 112 and connected to the connecting plate 117, allowing the nitrogen connecting pipe 14 to purge nitrogen into the first receiving space 111 for cooling, thus preventing the first receiving space 111 from being cooled by nitrogen blowing. If the temperature is too high and the high temperature is transferred to the second receiving space 112, a cooling hole 118 is opened on the connecting plate 117. This allows the nitrogen gas blown from the nitrogen connecting pipe 14 to the first receiving space 111 to flow back to the second receiving space 112 through the cooling hole 118. This prevents the nitrogen connecting pipe 14 from directly blowing nitrogen into the second receiving space 112, which would cause the electrical circuits and appliances to become too cold and affect the normal operation of the appliances. At the same time, the cooling hole 118 also allows the circuit air passage on the clamping device 12 to pass through the cooling hole 118 to the second receiving space 112 and connect to the quick-change mother plate 115. After the robot is connected to the quick-change mother plate 115, it provides electrical and pneumatic power to the clamping device 12.

[0036] In an embodiment of the present invention, the clamping device 12 includes a chuck seat 121 and three jaws 122. The chuck seat 121 is fixedly connected to the connecting disk 117, and the center of the chuck seat 121 is concentric with the through hole 113. The three jaws 122 are evenly distributed around the center of the chuck.

[0037] The chuck seat 121 is fixed to the connecting plate 117, and the three jaws 122 are distributed around the chuck seat 121. The chuck seat 121 is concentric with the through hole 113, so that the oxygen lance tube 2 can be inserted into the center of the chuck seat 121 after being inserted through the through hole 113. Then, by controlling the three jaws 122 to move simultaneously towards the center of the chuck seat 121, the oxygen lance tube 2 can be clamped and fixed. After the oxygen lance tube 2 is inserted into the center of the chuck seat 121, it is connected to the oxygen connecting pipe 13 on the connecting plate 117, so that the oxygen connecting pipe 13 can provide oxygen to the oxygen lance tube 2, so that the other end of the oxygen lance tube 2 can spray oxygen for combustion. In an embodiment of the present invention, the chuck seat 121 is a pneumatic chuck seat 121. By supplying air to the pneumatic chuck seat 121 and maintaining pressure, the three grippers 122 move simultaneously under the drive of the gas, thereby completing the clamping action of the oxygen lance tube 2. When the air pressure in the pneumatic chuck seat 121 is released, the three grippers 122 can release the clamping action of the oxygen lance tube 2.

[0038] As shown in Figure 3, in an embodiment of the present invention, a first connecting flange 131 and a second connecting flange 132 are fixed at both ends of the oxygen connecting pipe 13. The first connecting flange 131 is connected to the connecting plate 117, and the second connecting flange 132 is connected to the quick-change female plate 115.

[0039] One end of the oxygen connecting pipe 13 is connected to the connecting plate 117 via the first connecting flange 131, and the other end is connected to the quick-change female plate 115 via the second connecting flange 132. This strengthens the overall structural rigidity of the oxygen lance clamp 1. Simultaneously, it allows the oxygen lance tube 2 to pass through the clamping device 12 and connect to the connecting plate 117. Under the action of the first connecting flange 131, oxygen is delivered through the connecting plate 117 to the oxygen lance tube 2, preventing oxygen leakage within the housing 11. The end of the oxygen connecting pipe 13 closest to the second connecting flange 132 is closed to prevent oxygen leakage from that end, which could lead to wasted oxygen resources or even a fire. Therefore, the oxygen input into the oxygen connecting pipe 13 can only flow from the end of the first connecting flange 131 and enter the oxygen lance tube 2.

[0040] In an embodiment of the present invention, a protruding connecting sleeve 133 is provided on the side of the first connecting flange 131 away from the second connecting flange 132 for the oxygen gun tube 2 to be fitted. The connecting sleeve 133 communicates with the oxygen connecting pipe 13 through the first connecting flange 131, and a sealing gasket is provided inside the connecting sleeve 133.

[0041] By providing a protruding connecting sleeve 133 at one end of the oxygen connecting pipe 13, the end of the oxygen lance tube 2 can be inserted into the connecting sleeve 133 after the oxygen lance tube 2 is clamped in the clamping device 12. This not only facilitates the connection between the oxygen lance tube 2 and the oxygen connecting pipe 13, but also increases the sealing performance of the oxygen connecting pipe 13 and the oxygen lance tube 2 after connection, preventing the risk of oxygen leakage. Furthermore, by providing a sealing gasket inside the connecting sleeve 133, the end face of the oxygen lance tube 2 can fit more tightly with the connecting sleeve 133, further increasing the sealing performance of the connection between the oxygen lance tube 2 and the oxygen connecting pipe 13.

[0042] In the above example, the inner diameter of the connecting sleeve 133 is adapted to the outer diameter of the oxygen lance tube 2, and the connecting sleeve 133 is open in shape, that is, the outermost inner diameter of the connecting sleeve 133 is larger than the innermost inner diameter. This allows the oxygen lance tube 2 to be guided by the open shape when inserted into the connecting sleeve 133, which is more conducive to the connection between the oxygen lance tube 2 and the connecting sleeve 133. Since the innermost inner diameter of the connecting sleeve 133 is adapted to the outer diameter of the oxygen lance tube 2, after the oxygen lance tube 2 is inserted into the innermost position of the connecting sleeve 133, the connecting sleeve 133 can lock the oxygen lance tube 2, so as to prevent the oxygen lance tube 2 from detaching from the connecting sleeve 133 and causing oxygen leakage.

[0043] In an embodiment of the present invention, a flashback valve 134 is provided on the oxygen connecting pipe 13, and the oxygen connecting pipe 13 is connected to an external oxygen source through the flashback valve 134. By providing the flashback valve 134 on the oxygen connecting pipe 13, the external oxygen source is connected to the oxygen connecting pipe 13 through the flashback valve 134. This ensures that oxygen can smoothly enter the oxygen lance tube 2 when the external oxygen source supplies oxygen to the oxygen connecting pipe 13. Furthermore, the flashback valve 134 prevents oxygen in the oxygen lance tube 2 from flowing back to the oxygen connecting pipe 13 or even the oxygen source. Thus, when flashback occurs during oxygen blowing in the oxygen lance tube 2, it prevents the flame from spreading to the oxygen lance tube 2 or the oxygen source.

[0044] In an embodiment of the present invention, the outer surface of the housing 11 is covered with a heat insulation sheet 119, and the inner surface of the housing 11 is provided with a heat-conducting sheet 110.

[0045] By providing a heat insulation sheet 119 on the outer surface of the housing 11, the outer surface of the housing 11 is insulated from the high temperature of the site by the heat insulation sheet 119, so as to prevent heat from being transferred from the surface of the housing 11 to the interior of the housing 11 and causing adverse effects on the electrical circuits or appliances. By providing a heat conducting sheet 110 inside the housing 11, the heat emitted by the appliances during operation is transferred to the heat conducting sheet 110, which can also prevent the appliances from malfunctioning due to excessive temperature. The heat insulation sheet 119 is a ceramic sheet, and the heat conducting sheet 110 is a heat-conducting aluminum profile.

[0046] To address the technical problems existing in the prior art, the present invention also provides a sprue burning system, which includes a robot and the aforementioned oxygen lance clamp 1, with a connector at the end of the robot connected to the housing 11.

[0047] When performing sprue burn-off operations, a robot can be deployed at the work site, and the robot control cabinet can be placed in the office. The oxygen lance holder 1 is connected to the robot through a connector, so that the oxygen lance holder 1 can be moved by the movement of the robot. By programming the stacking position of the oxygen lance tube 2 and the position of the sprue outlet and inputting them into the robot control cabinet, the robot can drive the oxygen lance holder 1 to grab the oxygen lance tube 2 and perform subsequent sprue burn-off operations according to the programming.

[0048] After clamping the oxygen lance tube 2, the clamping device 12 connects to the oxygen connecting pipe 13 via the connecting sleeve 133. This allows oxygen to be supplied to the oxygen lance tube 2 through the oxygen connecting pipe 13, facilitating subsequent nozzle burning operations. Because the ambient temperature during nozzle burning operations is excessively high, nitrogen is blown into the housing 11 through the nitrogen connecting pipe 14 to cool it. This prevents damage to the electrical wiring and components inside the housing 11 due to excessive temperature within the oxygen lance clamp 1. The connector is a quick-change male plate. The robot and the oxygen lance clamp 1 are connected via the quick-change male plate and quick-change female plate 115, allowing the robot to quickly connect the oxygen lance clamp 1 to its end effector for subsequent nozzle burning operations.

[0049] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An oxygen lance clamp for burn-in of sprue nozzles, characterized in that, The oxygen lance clamp includes a housing, a clamping device, an oxygen connecting pipe, and a nitrogen connecting pipe. The clamping device and the oxygen connecting pipe are both housed within the housing, with the oxygen connecting pipe connected to the clamping device. The nitrogen connecting pipe is connected to the surface of the housing. An external nitrogen source is connected to the nitrogen connecting pipe to cool the housing by blowing nitrogen. A through hole is provided on the surface of the housing for inserting the oxygen lance tube and clamping it by the clamping device. The oxygen lance tube passes through the clamping device and connects to the oxygen connecting pipe. The housing includes a first accommodating space and a second accommodating space, with a heat insulation plate between the first and second accommodating spaces. The clamping device is located within the first accommodating space. Within the accommodating space, the oxygen connecting pipe is disposed within the second accommodating space and connected to the clamping device; a quick-change female plate is disposed within the second accommodating space, the connecting surface of the quick-change female plate being flush with the outer surface of the second accommodating space away from the first accommodating space; the clamping device is electrically connected to the quick-change female plate and has an integrated signal socket on the outer surface of the quick-change female plate; a connecting plate is fixed on the heat insulation plate, the oxygen connecting pipe and the clamping device are respectively fixedly connected to both sides of the connecting plate, the nitrogen connecting pipe is located within the second accommodating space and connected to the connecting plate, and the connecting plate has cooling holes communicating with the first accommodating space and the second accommodating space.

2. The oxygen lance clamp according to claim 1, characterized in that: The clamping device includes a chuck base and three jaws. The chuck base is fixedly connected to the connecting plate, and the center of the chuck base is concentric with the through hole. The three jaws are evenly distributed around the center of the chuck.

3. The oxygen lance clamp according to claim 2, characterized in that: The oxygen connecting pipe is fixed at both ends with a first connecting flange and a second connecting flange, the first connecting flange being connected to the connecting disc and the second connecting flange being connected to the quick-change female disc.

4. The oxygen lance clamp according to claim 3, characterized in that: The first connecting flange has a protruding connecting sleeve on the side away from the second connecting flange for the oxygen lance tube to be fitted. The connecting sleeve communicates with the oxygen connecting pipe through the first connecting flange, and a sealing gasket is provided inside the connecting sleeve.

5. The oxygen lance clamp according to claim 4, characterized in that: The oxygen connection pipe is equipped with a flashback valve, and the oxygen connection pipe is connected to an external oxygen source through the flashback valve.

6. The oxygen lance clamp according to any one of claims 1-5, characterized in that: The outer surface of the housing is covered with a heat insulation sheet, and the inner surface of the housing is provided with a heat-conducting sheet.

7. A sprue burner system, characterized in that, The sprue burning system includes a robot and an oxygen lance clamp as described in any one of claims 1-6, wherein the robot's end is provided with a connector that connects to the housing.

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