Tapping equipment and method for external thread connecting piece of blast furnace coal gun

Abstract

The invention relates to the technical field of tapping equipment, and particularly discloses tapping equipment for a blast furnace coal gun external thread connecting piece, which comprises a rack, a processing bin is fixedly connected to the left side of the top of the rack, a tapping threading die is mounted on the side surface of the processing bin, a workpiece frame is arranged on the right side of the top of the rack, and a blanking frame is inserted into the top of the workpiece frame; the tapping equipment for the external thread connecting piece further comprises a clamping assembly arranged on the inner side of the workpiece frame, the clamping assembly comprises a mounting frame fixedly connected to the inner side of the workpiece frame, a clamping part is arranged on the left side of the mounting frame, and the supporting assembly is arranged on the inner side of the workpiece frame. And the deformation of the round pipe part with a thin pipe wall is prevented, so that the out-of-round of the pipe caused by overlarge radial force during clamping, tooth missing of a sleeved thread in the long axis direction of an ellipse and over-shallow in the short axis direction are avoided, and the machining quality of the round pipe part is improved.

Description

Technical Field

[0001] This invention relates to the field of tapping equipment technology, and in particular to a tapping device and method for an external thread connector of a blast furnace coal lance. Background Technology

[0002] The coal lance is a key component for injecting pulverized coal into the blast furnace. It requires frequent disassembly and replacement, and its connection reliability directly affects the safe operation of the blast furnace. The coal lance is usually quickly connected to the pulverized coal delivery pipeline through a threaded connector. The thread requires high precision, high strength, and strong sealing. When tapping the threaded connectors of various blast furnace coal lances, the raw material is first cut to the specified length using a saw or laser cutting machine. The blank is then initially shaped through a forging process. During the forging process, the heating temperature and deformation amount need to be controlled to ensure the continuity of the fiber structure and improve the impact resistance of the material. Then, the outer side of the cut tubular workpiece is tapped.

[0003] When tapping tubular external threaded connectors, a large clamping force is required to prevent the tubular part from rotating during tapping and affecting the tapping quality. This ensures that the part does not shift during tapping and improves the tapping effect. However, excessive clamping force can easily cause deformation of the part, especially for connectors with thin walls. Excessive radial force during clamping can cause the tube to become out of round, resulting in missing teeth along the major axis of the ellipse and an excessively shallow thread along the minor axis. This affects the stability of subsequent connections, impacts the quality of the round tube parts, and makes workpiece clamping inconvenient during tapping, thus affecting the efficiency of connector processing. Summary of the Invention

[0004] The purpose of this invention is to provide a tapping device for the external thread connector of a blast furnace coal lance, which can support the inner side of the round tube part during clamping, prevent deformation of the thin-walled round tube part, and avoid excessive radial force during clamping, which would cause the tube to become out of round, resulting in missing teeth in the major axis direction of the ellipse and excessive shallowness in the minor axis direction. This improves the processing quality of the round tube part and solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tapping device for external threaded connectors of blast furnace coal lances, comprising a frame, a processing chamber fixedly connected to the top left side of the frame, a tapping die installed on the side of the processing chamber, a workpiece frame disposed on the top right side of the frame, and a material drop frame inserted into the top of the workpiece frame; the tapping device for external threaded connectors further includes:

[0006] A clamping assembly is disposed inside the workpiece frame. The clamping assembly includes a mounting bracket fixedly connected to the inside of the workpiece frame, and a clamping part is disposed on the left side of the mounting bracket.

[0007] A support assembly is disposed inside the workpiece frame. The support assembly includes a moving rod that is slidably connected to the inside of the mounting frame. A support head is fixedly connected to the end of the moving rod. The ring side of the support head is provided with a small groove in an annular array. A first piston is movably connected inside the small groove. A small rod is fixedly connected to the side of the first piston. A support plate is fixedly connected to the side of the small rod away from the first piston.

[0008] The electric telescopic rod is fixedly connected to the bottom inner side of the workpiece frame, and the output shaft of the electric telescopic rod is fixedly connected to a support frame.

[0009] Preferably, the clamping part includes a connecting ring fixedly connected to the left side of the mounting frame, and hydraulic rods are fixedly connected to the ring side of the connecting ring in an annular array, and the output shaft of the hydraulic rods is fixedly connected to a clamping plate.

[0010] Preferably, the support assembly further includes a baffle plate fixedly connected to the outside of the moving rod, a sleeve slidably connected to the outside of the moving rod, a fixed rod fixedly connected to the inside of the sleeve, a circular groove opened on the inner side of the left part of the moving rod, the circular groove communicating with the small groove, the end of the fixed rod extending into the inside of the circular groove and fixedly connected to a second piston, the outside of the second piston fitting against the inside of the circular groove, and a first spring fixedly connected between the second piston and the moving rod.

[0011] Preferably, a drive assembly is provided on the right side of the mounting bracket. The drive assembly includes a first motor fixedly connected to the right side of the mounting bracket, and a lead screw fixedly connected to the output shaft of the first motor. The drive assembly also includes a motion ring fixedly connected to the outside of the sleeve, and the outside of the lead screw is threadedly connected to the motion ring.

[0012] Preferably, the mounting frame is externally configured with a pushing assembly, which includes an inclined block fixedly connected to the bottom side of the moving ring. The pushing assembly also includes a connecting frame fixedly connected to the bottom of the mounting frame. A medium cylinder is fixedly connected to the top of the connecting frame. A third piston is movably connected inside the medium cylinder. A lifting rod is fixedly connected to the top of the third piston. A second spring is fixedly connected between the third piston and the medium cylinder.

[0013] Preferably, the jacking assembly further includes a medium tank opened inside the support frame, a fourth piston is movably connected to the right side of the medium tank, a jacking frame is fixedly connected to the side of the fourth piston, and a connecting pipe is fixedly inserted between the medium tank and the medium cylinder.

[0014] Preferably, the top of the lifting rod is rotatably connected to a ball bearing for reducing motion friction, and the left side of the connecting tube is made of a flexible material.

[0015] Preferably, a leveling component is provided on the left side of the support head. The leveling component includes a rotating frame rotatably connected to the left side of the support head. A roller is rotatably connected to the side of the rotating frame away from the support head. A torsion spring is fixedly connected between the rotating frame and the support head.

[0016] Preferably, the diameter of the support frame is larger than the diameter of the workpiece to be processed.

[0017] A tapping method for an external threaded connector for a blast furnace coal lance, comprising the following steps:

[0018] S1. Material unloading: The round pipe connector falls onto the support frame;

[0019] S2, Clamping: The support assembly supports the inner side of the round tube connector, and the clamping assembly clamps the workpiece.

[0020] S3. Machining: The tapping die is used to tap the outer side of the round pipe connector.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. By using the support components, the inner side of the round tube parts can be supported during clamping, preventing deformation of thin-walled round tube parts. This avoids excessive radial force during clamping, which could cause the tube to become out of round, resulting in missing teeth in the major axis direction of the ellipse and excessive shallowness in the minor axis direction, thus improving the quality of the round tube parts machining.

[0023] 2. As the workpiece passes through, the round tube part falls along the blanking frame onto the inner side of the support frame. After the support is completed, the output shaft of the hydraulic rod extends, allowing multiple clamping plates to approach the round tube part and clamp it. This design can automatically clamp the part, which helps to improve the processing efficiency of the outer threads of the connector.

[0024] 3. The pusher pushes the round tube part, and then ensures that the round tube part is close to the side of the mounting bracket during support and clamping. This prevents the round tube part from shifting due to the radial pressure from tapping during subsequent tapping, thereby further preventing any impact on the tapping quality. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is an overall structural view of the present invention;

[0027] Figure 2 This is a partial half-section structural diagram of the present invention;

[0028] Figure 3 This is a schematic diagram of a half-section of the workpiece frame of the present invention;

[0029] Figure 4 This is a partial structural schematic diagram of the mounting bracket of the present invention;

[0030] Figure 5 This is a half-sectional structural diagram of the mounting bracket of the present invention;

[0031] Figure 6 This is a side view of the support structure of the present invention;

[0032] Figure 7 This is a schematic diagram of a half-section of the sleeve of the present invention;

[0033] Figure 8 This is a partial structural schematic diagram of the motion rod of the present invention;

[0034] Figure 9 For the present invention Figure 8 Enlarged view of point A;

[0035] Figure 10 This is a side view of the connecting ring structure of the present invention;

[0036] Figure 11 This is a partial structural schematic diagram of the torsion spring of the present invention;

[0037] Figure 12 This is a schematic diagram of a half-section of the medium cylinder of the present invention;

[0038] Figure 13 This is a half-sectional structural diagram of the support frame of the present invention.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Frame; 2. Machining chamber; 3. Tapping die; 4. Workpiece frame; 5. Clamping assembly; 51. Mounting bracket; 52. Clamping part; 521. Connecting ring; 522. Hydraulic rod; 523. Clamping plate; 6. Support assembly; 61. Moving rod; 62. Support head; 63. Small groove; 64. First piston; 65. Small rod; 66. Support plate; 67. Blocking plate; 68. Sleeve; 69. Fixed rod; 610. Circular groove; 611. Second piston; 612. First spring; 7. Drive 71. Moving component; 72. First motor; 73. Lead screw; 74. Moving ring; 8. Pushing component; 85. Inclined block; 86. Connecting frame; 87. Medium cylinder; 88. Third piston; 89. Lifting rod; 80. Second spring; 81. Medium trough; 82. Fourth piston; 83. Pushing frame; 84. Ball bearing; 85. Connecting pipe; 96. Alignment component; 97. Rotating frame; 98. Roller; 99. Torsion spring; 10. Drop frame; 11. Electric telescopic rod; 12. Support frame. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Example 1: Please refer to Figures 1 to 13 This invention provides a technical solution: a tapping device for external thread connectors of blast furnace coal lances, comprising a frame 1, a processing chamber 2 fixedly connected to the top left side of the frame 1, and a tapping die 3 installed on the side of the processing chamber 2. The installation method of the tapping die 3 is a mature existing technology and will not be described in detail. A workpiece frame 4 is configured on the top right side of the frame 1, and a material drop frame 10 is inserted into the top of the workpiece frame 4. The tapping device for external thread connectors also includes a clamping assembly 5 configured inside the workpiece frame 4. The clamping assembly 5 includes a mounting frame 51 fixedly connected to the inside of the workpiece frame 4. A clamping part 52 is configured on the left side of the mounting frame 51. The clamping part 52 includes a connecting ring 521 fixedly connected to the left side of the mounting frame 51. A hydraulic rod 522 is fixedly connected to the ring side of the connecting ring 521 in an annular array. A clamping plate 523 is fixedly connected to the output shaft of the hydraulic rod 522.

[0043] The tapping equipment for the external thread connector also includes an electric telescopic rod 11 fixedly connected to the bottom of the inner side of the workpiece frame 4, and the output shaft of the electric telescopic rod 11 is fixedly connected to a support frame 12.

[0044] The diameter of the support frame 12 is larger than the diameter of the workpiece to be processed, so as to ensure that the connecting parts can fall smoothly into the inner side of the support frame 12.

[0045] By adopting the above technical solution, the machining chamber 2 is equipped with a motor for driving the tapping die 3 to rotate, so that the tapping die 3 can rotate to perform thread fitting machining on the external thread. The machining chamber 2 is also equipped with a servo electric cylinder for driving the tapping die 3 and its driving motor to move in the left and right directions, so as to adjust the position of the tapping die 3.

[0046] The tapping device for the external thread connector also includes a support assembly 6 disposed inside the workpiece frame 4. The support assembly 6 includes a moving rod 61 slidably connected to the inside of the mounting bracket 51. A support head 62 is fixedly connected to the end of the moving rod 61. The support head 62 has small grooves 63 arranged in annular array on its circumferential side. A first piston 64 is movably connected inside the small grooves 63. A small rod 65 is fixedly connected to the side of the first piston 64. A support plate 66 is fixedly connected to the side of the small rod 65 away from the first piston 64. The support assembly 6 also includes a fixed... A stop plate 67 is fixedly connected to the outside of the moving rod 61. A sleeve 68 is slidably connected to the outside of the moving rod 61. A fixing rod 69 is fixedly connected to the inside of the sleeve 68. A circular groove 610 is opened on the inner left side of the moving rod 61. The circular groove 610 communicates with the small groove 63. The end of the fixing rod 69 extends into the inside of the circular groove 610 and is fixedly connected to a second piston 611. The outside of the second piston 611 fits against the inside of the circular groove 610. A first spring 612 is fixedly connected between the second piston 611 and the moving rod 61.

[0047] The right side of the mounting bracket 51 is equipped with a drive assembly 7. The drive assembly 7 includes a first motor 71 fixedly connected to the right side of the mounting bracket 51. The output shaft of the first motor 71 is fixedly connected to a lead screw 72. The drive assembly 7 also includes a motion ring 73 fixedly connected to the outside of the sleeve 68. The outside of the lead screw 72 is threadedly connected to the motion ring 73.

[0048] By adopting the above technical solution, before the raw material falls into the support frame 12, the moving ring 73 is located on the right side of the lead screw 72, so that the sleeve 68 is located on the right side. At this time, the support head 62 is located inside the mounting frame 51 and does not block the support frame 12.

[0049] The inner side of the dropping frame 10 is adapted to the length of the round tube connector. When processing is required, the cut round tube connector is placed into the inside of the dropping frame 10 through the externally set part feeding device, so that the round tube part falls along the dropping frame 10 to the inner side of the support frame 12. Automatically dropping a single part into the dropping frame 10 is a mature existing technology and will not be described in detail.

[0050] After the part falls inside the support bracket 12, the output shaft of the first motor 71 rotates, which causes the lead screw 72 to rotate, thereby causing the moving ring 73 to move to the left. The moving ring 73, along with the sleeve 68 and the fixed rod 69, moves to the left. At this time, under the elastic force of the first spring 612, the moving rod 61 moves to the left, thus allowing the moving rod 61 to move to the left with the support head 62 and enter the interior of the round tube part.

[0051] After the support head 62 moves to the left and enters the interior of the round tube part, the support head 62 continues to move to the left until the side of the blocking plate 67 contacts the mounting bracket 51. At this time, the output shaft of the first motor 71 continues to rotate, and the sleeve 68, the fixed rod 69 and the moving rod 61 move relative to each other. At this time, the first spring 612 is stretched and deformed.

[0052] It should be noted that a pressure sensor is installed inside the circular groove 610 to detect the pressure of the medium inside the circular groove 610. When the sleeve 68, the fixed rod 69 and the moving rod 61 move relative to each other, the second piston 611 moves inside the circular groove 610, which facilitates the medium to enter the interior of the small groove 63. This causes the first piston 64 to move along with the small rod 65 and the support plate 66 until the support plate 66 contacts the inside of the circular tube part. At this point, the support plate 66 can no longer move. Then the second piston 611 continues to move. When the pressure sensor detects that the internal pressure of the circular groove 610 reaches the set value, it can ensure the appropriate support pressure. At this time, the output shaft of the first motor 71 stops rotating, and the support plate 66 continues to support the inside of the circular tube.

[0053] This design provides support to the inner side of the round tube part during clamping, preventing deformation of thin-walled round tube parts. This avoids excessive radial force during clamping, which could cause the tube to become out of round, resulting in missing teeth in the major axis direction of the ellipse and excessive shallowness in the minor axis direction, thus improving the quality of the round tube part machining.

[0054] After the support is completed, the output shaft of the hydraulic rod 522 extends, allowing multiple clamping plates 523 to approach the round tube part and clamp it. This design can automatically clamp the part, which is beneficial to improving the processing efficiency of the outer thread of the connector.

[0055] It should be noted that the positions of the multiple support plates 66 and the multiple clamping plates 523 correspond, and the multiple support plates 66 can also cooperate with the multiple clamping plates 523 to clamp the round tube parts, so as to further improve the stability of clamping the round tube parts.

[0056] It should be noted that because the support plate 66 is movable, it can be adapted to various round tube parts of different diameters.

[0057] It should be noted that the lead screw 72 is a self-locking lead screw, which ensures the stability of the support force after the support is completed, and ensures the support effect during processing.

[0058] After clamping is completed, the motor inside the machining chamber 2 rotates, and the output shaft of the servo electric cylinder installed inside the machining chamber 2 moves, so that the tapping die 3 approaches the outside of the round tube part and rotates, thereby completing the tapping of the outside of the round tube part.

[0059] After one tapping operation is completed, the output shaft of the hydraulic rod 522 retracts to release the clamping of the round tube part. Then, the output shaft of the first motor 71 rotates in the opposite direction to the previous one, so that the sleeve 68 and the fixing rod 69 move to the right. The first spring 612 then resets, followed by the reset of the multiple small rods 65 and the support plate 66. Then, the support head 62 moves to the right with the moving rod 61 and returns to the inside of the mounting bracket 51.

[0060] The mounting bracket 51 is externally configured with a push assembly 8. The push assembly 8 includes an inclined block 81 fixedly connected to the bottom side of the moving ring 73. The push assembly 8 also includes a connecting bracket 82 fixedly connected to the bottom of the mounting bracket 51. A medium cylinder 83 is fixedly connected to the top of the connecting bracket 82. A third piston 84 is movably connected inside the medium cylinder 83. A lifting rod 85 is fixedly connected to the top of the third piston 84. A second spring 86 is fixedly connected between the third piston 84 and the medium cylinder 83. The push assembly 8 also includes a medium groove 87 opened inside the support bracket 12. A fourth piston 88 is movably connected to the right side of the medium groove 87. A push frame 89 is fixedly connected to the side of the fourth piston 88. A connecting pipe 811 is fixedly inserted between the medium groove 87 and the medium cylinder 83. A ball 810 for reducing motion friction is rotatably connected to the top of the lifting rod 85. The left side of the connecting pipe 811 is made of flexible material so that it can be raised and lowered without affecting the support bracket 12.

[0061] By adopting the above technical solution, when the moving ring 73 moves to the left and before the support is completed, the ball 810 connected to the top of the lifting rod 85 will pass through the inclined surface of the inclined block 81. Under the limiting action of the inclined block 81, the lifting rod 85 can move downward with the third piston 84 to overcome the elastic force of the second spring 86. This allows the medium inside the medium cylinder 83 and below the third piston 84 to enter the interior of the connecting pipe 811. Subsequently, the medium enters the interior of the medium groove 87. At this time, the medium pressure inside the medium groove 87 increases, causing the fourth piston 88 to move to the left with the pusher 89. The pusher 89 pushes the round tube part. Then, during support and clamping, it ensures that the round tube part is close to the side of the mounting bracket 51, avoiding the radial pressure from tapping during subsequent tapping, which would cause the round tube part to move and shift, thereby further preventing the tapping quality from being affected.

[0062] It should be noted that when the ball 810 passes through the inclined surface of the inclined block 81, the pusher 89 can just press the side of the round tube part against the side of the mounting bracket 51, and the side of the pusher 89 is smooth.

[0063] It should be noted that after the support and clamping are completed, the output shaft of the electric telescopic rod 11 needs to be retracted so that the support frame 12 can move downwards, so that the support frame 12 does not affect the tapping process. The smooth side of the pusher 89 facilitates the downward movement of the support frame 12.

[0064] When the moving ring 73 moves to the right to reset, the elastic force of the third piston 84 facilitates the return of the medium to the inside of the medium cylinder 83, which allows the pusher 89 to reset.

[0065] A leveling component 9 is arranged on the left side of the support head 62. The leveling component 9 includes a rotating frame 91 rotatably connected to the left side of the support head 62. A roller 92 is rotatably connected to the side of the rotating frame 91 away from the support head 62. A torsion spring 93 is fixedly connected between the rotating frame 91 and the support head 62. The elastic force of the multiple torsion springs 93 is the same, and the elastic force of the first spring 612 is greater than the sum of the elastic forces of the multiple torsion springs 93.

[0066] By adopting the above technical solution, after the support head 62 enters the inside of the round tube part, under the elastic force of the torsion spring 93, multiple rotating frames 91 can swing so that multiple rollers 92 can be pressed against the inner side of the round tube part. Since the elastic force of multiple torsion springs 93 is the same, it is easy to adjust the axis of the round tube part to be consistent with the axis of the support head 62, so that the position of the round tube part is more central during subsequent support and clamping, reducing clamping deviation and improving the tapping effect of the connector.

[0067] It should be noted that after the processing is completed, as the sleeve 68 and the fixed rod 69 move to the right, the support head 62 moves to the right along with the moving rod 61. The sides of the multiple rotating frames 91 are deflected by the limit of the mounting frame 51, so as to facilitate the rotating frames 91 and the rollers 92 to return to the inside of the mounting frame 51.

[0068] A tapping method for an external threaded connector for a blast furnace coal lance, comprising the following steps:

[0069] S1. Unloading: The inner side of the unloading frame 10 is adapted to the length of the round tube connector. When processing is required, the cut round tube connector is placed into the inside of the unloading frame 10 through the externally set part feeding device, so that the round tube part falls along the unloading frame 10 onto the inner side of the support frame 12.

[0070] S2. Clamping: After the part falls inside the support frame 12, the output shaft of the first motor 71 rotates, which causes the lead screw 72 to rotate, thereby causing the moving ring 73 to move to the left. The moving ring 73 carries the sleeve 68 and the fixed rod 69 to the left. At this time, under the elastic force of the first spring 612, the moving rod 61 moves to the left, so that the moving rod 61 carries the support head 62 to the left and enters the interior of the round tube part.

[0071] After the support head 62 moves to the left and enters the interior of the circular tube part, it continues to move to the left until the side of the baffle plate 67 contacts the mounting bracket 51. At this time, the output shaft of the first motor 71 continues to rotate, and the sleeve 68, the fixed rod 69, and the moving rod 61 move relative to each other. At this time, the first spring 612 is stretched and deformed. A pressure sensor is installed inside the circular groove 610 to detect the pressure of the medium inside the circular groove 610. When the sleeve 68, the fixed rod 69, and the moving rod 61 move relative to each other, the second piston 611 moves inside the circular groove 610 to facilitate the entry of the medium into the small groove 6. Inside 3, the first piston 64 moves the small rod 65 and the support plate 66 until the support plate 66 contacts the inner side of the round tube part. At this time, the support plate 66 can no longer move. Then the second piston 611 continues to move. When the pressure sensor detects that the internal pressure of the round groove 610 reaches the set value, it can ensure the appropriate support pressure. At this time, the output shaft of the first motor 71 stops rotating, and the support plate 66 maintains support on the inner side of the round tube. After the support is completed, the output shaft of the hydraulic rod 522 extends, which allows multiple clamping plates 523 to approach the round tube part, thereby clamping the round tube part.

[0072] S3. After clamping is completed, the motor inside the machining chamber 2 rotates and the output shaft of the servo electric cylinder installed inside the machining chamber 2 moves, so that the tapping die 3 approaches the outside of the round tube part and rotates, thereby completing the tapping of the outside of the round tube part.

[0073] Working principle: After one tapping operation is completed, the output shaft of the hydraulic rod 522 retracts to release the clamping of the round tube part. Then, the output shaft of the first motor 71 rotates in the opposite direction, causing the sleeve 68 and the fixing rod 69 to move to the right. The first spring 612 then resets, followed by the reset of the multiple small rods 65 and the support plate 66. The support head 62 then moves to the right along with the moving rod 61, returning to the inside of the mounting bracket 51. When the moving ring 73 moves to the left, and before the support is completed, the ball 810 rotatably connected to the top of the lifting rod 85 passes over the inclined surface of the tilting block 81. Under the limiting action of the tilting block 81, the lifting rod 85 can move downward with the third piston 84 overcoming the elastic force of the second spring 86, so that the medium inside the medium cylinder 83 and below the third piston 84 can enter the interior of the connecting pipe 811, and then the medium enters the interior of the medium groove 87. At this time, the medium pressure inside the medium groove 87 increases, so that the fourth piston 88 moves to the left with the pusher 89. The pusher 89 pushes the round tube part, and then ensures that the round tube part is close to the side of the mounting bracket 51 during support and clamping, so as to avoid the radial pressure caused by tapping during subsequent tapping and thus prevent the round tube part from moving and shifting.

[0074] After the support head 62 enters the round tube part, the multiple rotating frames 91 can swing under the elastic force of the torsion spring 93, so that the multiple rollers 92 can be pressed against the inner side of the round tube part. Since the elastic force of the multiple torsion springs 93 is the same, it is easy to adjust the axis of the round tube part to be consistent with the axis of the support head 62, so that the position of the round tube part is more central during subsequent support and clamping, reducing clamping deviation and improving the tapping effect of the connector. It should be noted that after the processing is completed, as the sleeve 68 and the fixing rod 69 move to the right, the support head 62 moves to the right with the moving rod 61. The sides of the multiple rotating frames 91 are deflected by the limit of the mounting frame 51, so that the rotating frames 91 and the rollers 92 can return to the inner side of the mounting frame 51.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tapping device for an external thread connector of a blast furnace coal lance, comprising a frame (1), a processing chamber (2) fixedly connected to the top left side of the frame (1), a tapping die (3) installed on the side of the processing chamber (2), a workpiece frame (4) disposed on the top right side of the frame (1), and a dropping frame (10) inserted into the top of the workpiece frame (4), characterized in that, Tapping equipment for external thread connectors also includes: The clamping assembly (5) is disposed inside the workpiece frame (4). The clamping assembly (5) includes a mounting bracket (51) fixedly connected to the inside of the workpiece frame (4). A clamping part (52) is disposed on the left side of the mounting bracket (51). The support assembly (6) is disposed inside the workpiece frame (4). The support assembly (6) includes a moving rod (61) slidably connected to the inside of the mounting bracket (51). A support head (62) is fixedly connected to the end of the moving rod (61). The support head (62) has a small groove (63) arranged in annular array on its ring side. A first piston (64) is movably connected inside the small groove (63). A small rod (65) is fixedly connected to the side of the first piston (64). A support plate (66) is fixedly connected to the side of the small rod (65) away from the first piston (64). The electric telescopic rod (11) is fixedly connected to the bottom inner side of the workpiece frame (4), and the output shaft of the electric telescopic rod (11) is fixedly connected to the support frame (12).

2. The tapping device for the external threaded connector of a blast furnace coal lance according to claim 1, characterized in that: The clamping part (52) includes a connecting ring (521) fixedly connected to the left side of the mounting bracket (51), and a hydraulic rod (522) is fixedly connected to the ring side of the connecting ring (521) in an annular array. The output shaft of the hydraulic rod (522) is fixedly connected to a clamping plate (523).

3. The tapping device for the external threaded connector of a blast furnace coal lance according to claim 2, characterized in that: The support assembly (6) also includes a baffle plate (67) fixedly connected to the outside of the moving rod (61). A sleeve (68) is slidably connected to the outside of the moving rod (61). A fixing rod (69) is fixedly connected to the inside of the sleeve (68). A circular groove (610) is opened on the inner side of the left part of the moving rod (61). The circular groove (610) communicates with the small groove (63). The end of the fixing rod (69) extends into the inside of the circular groove (610) and is fixedly connected to a second piston (611). The outside of the second piston (611) is in contact with the inside of the circular groove (610). A first spring (612) is fixedly connected between the second piston (611) and the moving rod (61).

4. The tapping device for the external threaded connector of a blast furnace coal lance according to claim 3, characterized in that: The right side of the mounting bracket (51) is provided with a drive assembly (7). The drive assembly (7) includes a first motor (71) fixedly connected to the right side of the mounting bracket (51). The output shaft of the first motor (71) is fixedly connected to a lead screw (72). The drive assembly (7) also includes a motion ring (73) fixedly connected to the outside of the sleeve (68). The outside of the lead screw (72) is threadedly connected to the motion ring (73).

5. The tapping device for the external threaded connector of a blast furnace coal lance according to claim 4, characterized in that: The mounting bracket (51) is externally configured with a push assembly (8), which includes an inclined block (81) fixedly connected to the bottom side of the moving ring (73). The push assembly (8) also includes a connecting bracket (82) fixedly connected to the bottom of the mounting bracket (51). A medium cylinder (83) is fixedly connected to the top of the connecting bracket (82). A third piston (84) is movably connected inside the medium cylinder (83). A lifting rod (85) is fixedly connected to the top of the third piston (84). A second spring (86) is fixedly connected between the third piston (84) and the medium cylinder (83).

6. The tapping device for the external threaded connector of a blast furnace coal lance according to claim 5, characterized in that: The push assembly (8) also includes a medium tank (87) opened inside the support frame (12). A fourth piston (88) is movably connected to the right side of the medium tank (87). A push frame (89) is fixedly connected to the side of the fourth piston (88). A connecting pipe (811) is fixedly inserted between the medium tank (87) and the medium cylinder (83).

7. The tapping device for the external threaded connector of a blast furnace coal lance according to claim 6, characterized in that: The top of the lifting rod (85) is rotatably connected to a ball (810) for reducing motion friction, and the left side of the connecting tube (811) is made of flexible material.

8. The tapping device for the external threaded connector of a blast furnace coal lance according to claim 7, characterized in that: A leveling assembly (9) is provided on the left side of the support head (62). The leveling assembly (9) includes a rotating frame (91) rotatably connected to the left side of the support head (62). A roller (92) is rotatably connected to the side of the rotating frame (91) away from the support head (62). A torsion spring (93) is fixedly connected between the rotating frame (91) and the support head (62).

9. The tapping device for the external threaded connector of a blast furnace coal lance according to claim 8, characterized in that: The diameter of the support frame (12) is larger than the diameter of the workpiece to be processed.

10. A tapping method for an external threaded connector of a blast furnace coal lance, characterized in that: This method is applicable to the tapping equipment for the external threaded connector of the blast furnace coal lance as described in any one of claims 1-9, and includes the following steps: S1, material is dropped, and the round pipe connector falls onto the support frame (12); S2, clamping, the support component (6) supports the inner side of the round tube connector, and the clamping component (5) clamps the workpiece; S3, machining, tapping die (3) tapping the outside of the round tube connector.

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