Machining device for nodular cast iron pipe

Abstract

The invention discloses a nodular cast iron pipe machining device, and relates to the technical field of nodular cast iron pipe production, and the nodular cast iron pipe machining device is characterized in that an inner supporting mechanism is prevented from falling off due to the fact that the upper side and the lower side are not fixed due to placement of an iron pipe through a limiting rod and a rotating rod; the complexity and the labor intensity of manual operation are reduced through the self-adaptive inner supporting function, an operator only needs to conduct simple equipment operation and monitoring, the working difficulty and the labor intensity are reduced, the inner supporting plate is made to rotate through the driving disc, and therefore the iron pipe is made to rotate; the polishing mechanism polishes the outer circumferential face of the iron pipe from bottom to top through the reciprocating screw rod, the iron pipe is not fixed through the power gear, the rotating sleeve and the connecting rod after polishing is completed, the iron pipe is conveniently output, contact between an operator and equipment and the iron pipe in the polishing process is reduced, and the polishing efficiency is improved. And the safety accident risk caused by misoperation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of ductile iron pipe production, and specifically to a mechanical processing device for ductile iron pipes. Background Art

[0002] Traditionally, the inner wall grinding of ductile iron pipes is usually to fixedly install a long connecting rod on the motor drive shaft, with a brush installed at one end of the connecting rod. The motor drives the brush to rotate and gradually advance inside the pipe. This method requires the length of the connecting rod to be the same as the length of the pipe, resulting in a large-sized grinding machine, occupying a lot of space, being heavy and difficult to operate.

[0003] The patent with the patent announcement number CN216503874U relates to the technical field of ductile iron pipe production, specifically a grinding and rotating structure for ductile iron pipes, including a support frame. The support frame is provided with an anti-vibration structure and is connected with a plurality of first support blocks. The anti-vibration structure includes a support column. The support column is connected to the support frame. A sliding rod is slidably connected to the support column. A first connecting sleeve is rotatably connected to the sliding rod. A connecting rod is connected to the first connecting sleeve. A connecting column is connected to the connecting rod. The connecting column is connected with an outer cover. A plurality of rotating rollers are rotatably connected to the outer cover. The plurality of rotating rollers abut against the cast iron pipe. The cast iron pipe abuts against a plurality of guide wheels. An electric push rod is connected between the support column and the sliding rod; it is convenient to extrude the cast iron pipe during grinding, effectively avoiding the cast iron pipe from jumping during the grinding process and affecting the grinding effect, ensuring the quality after grinding, and improving the stability during grinding.

[0004] In the above patent, it effectively avoids the cast iron pipe from jumping during the grinding process and affecting the grinding effect, ensuring the quality after grinding. However, the current equipment has the following problems: During the grinding process, due to the different sizes of the iron pipes, it may be necessary to frequently adjust the position and clamping force of the fixture to ensure the correct position of the iron pipe, which will further reduce the work efficiency. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a mechanical processing device for ductile iron pipes, which solves the problems raised in the above background art.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A ductile iron pipe machining device, including a fixing frame and an iron pipe, the iron pipe is arranged inside the fixing frame, the upper and lower inner walls of the fixing frame are both rotatably installed with rotating rods, and further includes a grinding device; wherein, the grinding device includes a limiting rod, a pressing rod, a driving disk, a round rod, a fixing sleeve, an inner support plate, a chassis, a reciprocating lead screw and a grinding mechanism, the limiting rods are both slidably installed inside the rotating rods on both sides, the pressing rods are both slidably installed inside the rotating rods on both sides, a first card slot is formed on the circumferential surface of the driving disk, the round rod is fixedly installed at the output end of the driving disk, the fixing sleeve is fixedly installed on the circumferential surface of the round rod, the inner support plate is slidably installed inside the fixing sleeve, the chassis is rotatably installed at the bottom of the round rod, a second card slot is formed on the circumferential surface of the chassis, the reciprocating lead screw is arranged inside the fixing frame, the grinding mechanism is threadedly installed on the circumferential surface of the reciprocating lead screw. When the pipe moves, it will contact the inclined surface of the inner support plate, thereby compressing the second spring, and under the action of the second spring, the inner support plate clamps the inner wall of the iron pipe, and at this time the position of the iron pipe is fixed; Among them, inside the fixing frame, there is a support device for assisting in grinding the iron pipe and an output device for automatically discharging the iron pipe.

[0007] According to the above technical solutions, both the first card slot and the second card slot are limited by the limiting rod. The two sides of the limiting rod close to the card slot are both set as inclined surfaces, and the side of the limiting rod close to the pressing rod is set as an inclined surface. When the pressing rod moves downward, it will contact the inclined surface of the limiting rod, causing the limiting rod to disengage from the first card slot, and at the same time compressing the first spring. A first torsion spring is arranged between the rotating rod and the fixing frame, and the rotating rod is driven to reset by the first torsion spring. A first spring is arranged between the limiting rod and the rotating rod, and the limiting rod is driven to reset by the first spring. A first return spring is arranged between the pressing rod and the rotating rod, and the pressing rod is driven to reset by the first return spring. A second spring is arranged between the fixing sleeve and the inner support plate, and the inner support plate loses the clamping effect by the second spring. The top of the inner support plate is set as an inclined surface, and the inner support plate adapts to the size of the inner wall of the iron pipe through the set inclined surface.

[0008] According to the above technical solutions, the grinding device further includes a rotating sleeve, a power gear and a connecting rod. The rotating sleeve is sleeved on the circumferential surface of the round rod. A gear is arranged on the circumferential surface of the rotating sleeve. The power gear is arranged on the surface of the chassis. The power gear meshes with the gear. One side of the connecting rod is rotatably installed on the surface of the inner support plate, and the other side of the connecting rod is rotatably installed on the top of the rotating sleeve. After grinding is completed, the power gear rotates to drive the gear to rotate, so that the rotating sleeve rotates. The rotating sleeve rotates to drive the connecting rod to rotate, and the connecting rod rotates to drive the inner support plate to contract.

[0009] According to the above technical solution, the grinding device further includes a chute plate and a braking rod. The chute plate is fixedly installed on the inner wall of the fixed frame. One side of the braking rod is fixedly installed on the surface of the grinding mechanism, and the other side of the braking rod is slidably installed in the inner wall of the chute plate. When the grinding mechanism moves, it drives the braking rod to move.

[0010] According to the above technical solution, the auxiliary device includes a sliding rod and a brush plate. The sliding rod is slidably installed in the inner wall of the chute plate, and the brush plate is fixedly installed on the surface of the sliding rod. When the sliding rod moves, it drives the brush plate to move, and the outer wall of the iron pipe is cleaned by the movement of the brush plate.

[0011] According to the above technical solution, the auxiliary device further includes a fixed block and a stabilizing plate. The fixed block is fixedly installed on the top of the grinding mechanism, the stabilizing plate is slidably installed in the inner wall of the fixed block, and a third spring is arranged between the stabilizing plate and the fixed block. The third spring enables the stabilizing plate to adapt to the radius of the iron pipe. The top of the stabilizing plate is set as an inclined surface, and a pulley is arranged in the inner wall of the stabilizing plate. When the grinding mechanism moves, it drives the fixed block to move, and the movement of the fixed block drives the stabilizing plate to move.

[0012] According to the above technical solution, the output device includes a support plate, a triangular block, a driving rod and a limiting rod. The support plate is slidably installed on the surface of the fixed frame, and a fourth spring is arranged between the support plate and the fixed frame. The fourth spring enables the support plate to lose and obtain the supporting effect on the iron pipe. The triangular block is slidably installed on the surface of the fixed frame, and a fifth spring is arranged between the triangular block and the fixed frame. The fifth spring enables the triangular block to reset. The driving rod is slidably installed in the inner wall of the chute plate, and a sixth spring is arranged between the driving rod and the chute plate. The sixth spring drives the driving rod to reset. The limiting rod is fixedly installed at the bottom of the driving rod. When the grinding mechanism moves to the uppermost position, the sliding rod contacts the driving rod and makes the driving rod move upward. The movement of the driving rod drives the limiting rod to move upward, and the movement of the limiting rod causes the fifth spring to release and makes the support plate move away from the support of the bottom of the iron pipe. At this time, the iron pipe will slide downwards.

[0013] According to the above technical solution, the output device further includes a discharge cylinder, a rubber block and a hydraulic rod. The discharge cylinder is fixedly installed on the inner wall of the fixed frame, the rubber block is rotatably installed in the inner wall of the discharge cylinder, and a second torsion spring is arranged between the rubber block and the discharge cylinder. The second torsion spring enables the rubber block to buffer the output of the iron pipe. The hydraulic rod is arranged on the surface of the fixed frame, and a rubber plate is arranged at the top of the hydraulic rod. When the iron pipe slides down, it will contact the rubber block and the second torsion spring will buffer the falling of the iron pipe, and finally it will contact the rubber plate and be buffered by the hydraulic rod.

[0014] The present invention provides a mechanical processing device for ductile iron pipes. It has the following beneficial effects: (1) In this invention, through the setting of the grinding device, the limiting rod and the rotating rod are used to prevent the inner support mechanism from falling due to the placement of the iron pipe, which causes the loss of fixation on both the upper and lower sides. The inner support plate clamps the inner wall of the iron pipe, and the self-adaptive inner support function reduces the complexity and labor intensity of manual operation. The operator only needs to perform simple equipment operation and monitoring, reducing the work difficulty and labor intensity. The driving disk rotates the inner support plate, thereby rotating the iron pipe. The reciprocating lead screw makes the grinding mechanism grind the outer circumferential surface of the iron pipe from bottom to top. After grinding, the iron pipe loses fixation through the power gear, rotating sleeve, and connecting rod, facilitating the output of the iron pipe, reducing the contact between the operator and the equipment and the iron pipe during the grinding process, and reducing the risk of safety accidents caused by improper operation. (2) In this invention, through the setting of the auxiliary device, when the grinding mechanism is grinding, the brush plate moves to clean the outer wall of the iron pipe. A large amount of iron filings and debris will be generated during the grinding process. If these debris are not removed in time, they may be embedded in the surface of the iron pipe, affecting the surface quality of the iron pipe and subsequent processing. When the grinding mechanism moves, it drives the stabilizing plate to adaptively support the outer circumferential surface of the iron pipe. The support can keep the iron pipe stable during the grinding process, reducing problems such as uneven grinding or scratches caused by the shaking of the iron pipe, thereby improving the grinding accuracy and surface quality. (3) In this invention, through the setting of the output device, the support plate supports the bottom of the iron pipe. When the grinding mechanism moves to the uppermost position, the support plate moves away from supporting the bottom of the iron pipe, and at this time, the iron pipe will slide down. During the process of the iron pipe sliding down automatically after grinding, the direct contact between the personnel and the iron pipe is reduced, and the risk of injury to the personnel caused by factors such as high temperature on the surface of the iron pipe and sharp edges is reduced. The iron pipe will contact the rubber block during the fall and be buffered by the second torsion spring, and finally contact the rubber plate and be buffered by the hydraulic rod to prevent the iron pipe from being damaged directly due to falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the positional structure of the inner support plate and the stabilizing plate of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure of part A in; Figure 4 Schematic diagram of the positional structure of the lower rotating rod and the chassis of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of part B in; Figure 6 Schematic diagram of the positional structure of the limiting rod and the driving disk of the present invention; Figure 7 Schematic diagram of the positional structure of the sliding rod and the brush plate of the present invention; Figure 8 For the present invention Figure 7 Schematic enlarged view of the C part structure in the present invention; Figure 9 Schematic diagram of the position structure of the rubber block and the output cylinder of the present invention.

[0016] In the figure: 1, fixing frame; 01, iron pipe; 2, rotating rod; 3, limiting rod; 4, pressing rod; 5, driving disk; 6, round rod; 7, fixing sleeve; 8, inner support plate; 9, chassis; 10, rotating sleeve; 11, power gear; 12, connecting rod; 13, reciprocating lead screw; 14, grinding mechanism; 15, chute plate; 16, braking rod; 20, sliding rod; 21, brush plate; 22, fixing block; 23, stabilizing plate; 30, supporting plate; 31, triangular block; 32, driving rod; 33, limiting rod; 34, discharge cylinder; 35, rubber block; 36, hydraulic rod. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-6 , an embodiment of the present invention is: a ductile iron pipe machining device, including a fixing frame 1 and an iron pipe 01. The iron pipe 01 is arranged inside the fixing frame 1. Rotating rods 2 are rotatably installed on the upper and lower inner walls of the fixing frame 1. It also includes a grinding device. Among them, the grinding device includes a limiting rod 3, a pressing rod 4, a driving disk 5, a round rod 6, a fixing sleeve 7, an inner support plate 8, a chassis 9, a reciprocating lead screw 13 and a grinding mechanism 14. The limiting rods 3 are slidably installed on the inner walls of the two rotating rods 2, the pressing rods 4 are slidably installed on the inner walls of the two rotating rods 2. A first slot is provided on the circumferential surface of the driving disk 5. The round rod 6 is fixedly installed at the output end of the driving disk 5. The fixing sleeve 7 is fixedly installed on the circumferential surface of the round rod 6. The inner support plate 8 is slidably installed on the inner wall of the fixing sleeve 7. The chassis 9 is rotatably installed at the bottom of the round rod 6. A second slot is provided on the circumferential surface of the chassis 9. The reciprocating lead screw 13 is arranged on the inner wall of the fixing frame 1. The grinding mechanism 14 is threadedly installed on the circumferential surface of the reciprocating lead screw 13. The self-adaptive inner support function reduces the complexity and labor intensity of manual operation. The operator only needs to perform simple equipment operation and monitoring, reducing the work difficulty and labor intensity.

[0019] Both the first card slot and the second card slot are limited by the limiting rod 3. Both sides of the limiting rod 3 close to the card slot are set as inclined planes, and one side of the limiting rod 3 close to the pressing rod 4 is set as an inclined plane. A first torsion spring is arranged between the rotating rod 2 and the fixed frame 1 to drive the rotating rod 2 to reset through the first torsion spring. A first spring is arranged between the limiting rod 3 and the rotating rod 2 to drive the limiting rod 3 to reset through the first spring. A first reset spring is arranged between the pressing rod 4 and the rotating rod 2 to drive the pressing rod 4 to reset through the first reset spring. A second spring is arranged between the fixed sleeve 7 and the inner support plate 8 to drive the inner support plate 7 to lose the clamping effect through the second spring. The top of the inner support plate 8 is set as an inclined plane, and the inner support plate 8 adapts to the size of the inner wall of the iron pipe 01 through the arranged inclined plane.

[0020] The grinding device further includes a rotating sleeve 10, a power gear 11 and a connecting rod 12. The rotating sleeve 10 is sleeved on the circumferential surface of the round rod 6. A gear is arranged on the circumferential surface of the rotating sleeve 10. The power gear 11 is arranged on the surface of the chassis 9. The power gear 11 meshes with the gear. One side of the connecting rod 12 is rotatably installed on the surface of the inner support plate 8, and the other side of the connecting rod 12 is rotatably installed on the top of the rotating sleeve 10, so that the iron pipe 01 loses its fixation to facilitate the output of the iron pipe 01, reducing the contact between the operator and the equipment and the iron pipe 01 during the grinding process and reducing the risk of safety accidents caused by improper operation.

[0021] The grinding device further includes a chute plate 15 and a braking rod 16. The chute plate 15 is fixedly installed on the inner wall of the fixed frame 1. One side of the braking rod 16 is fixedly installed on the surface of the grinding mechanism 14, and the other side of the braking rod 16 is slidably installed on the inner wall of the chute plate 15. The grinding mechanism 14 can move smoothly through the chute plate 15.

[0022] When this embodiment works, the iron pipe 01 is vertically placed into the fixing frame 1. At this time, the outer wall of the iron pipe 01 will contact the pressing rod 4, causing the pressing rod 4 to move downward and compress the first reset spring simultaneously. When the pressing rod 4 moves downward, it will contact the inclined surface of the limiting rod 3, causing the limiting rod 3 to disengage from the first clamping groove and compress the first spring at the same time. After the limiting rod 3 disengages, the iron pipe 01 continues to move, causing the rotating rod 2 to rotate downward and compress the first torsion spring. Until the rotating rod 2 no longer contacts the iron pipe 01, it is reset by the first torsion spring. When the rotating rod 2 is reset, the inclined surface of the limiting rod 3 contacts the circumferential surface of the driving disk 5, causing the limiting rod 3 to be clamped into the first clamping groove under the action of the first spring, completing the fixation of the driving disk 5. When the driving disk 5 loses its fixation, the same structure at the lower rotating rod 2 is used to fix the chassis 9, preventing the inner support mechanism from falling due to the placement of the iron pipe 01 resulting in the loss of fixation on both the upper and lower sides. When the iron pipe 01 moves, it will contact the inclined surface of the inner support plate 8, thereby compressing the second spring, and under the action of the second spring, the inner support plate 8 clamps the inner wall of the iron pipe 01. At this time, the position of the iron pipe 01 is fixed. The adaptive inner support function reduces the complexity and labor intensity of manual operation. The operator only needs to perform simple equipment operation and monitoring, reducing the working difficulty and labor intensity. At this time, the output end of the driving disk 5 rotates to drive the round rod 6 to rotate. The round rod 6 rotates to drive the fixed sleeve 7 to rotate. The fixed sleeve 7 rotates to drive the inner support plate 8 to rotate, thereby causing the iron pipe 01 to rotate. Subsequently, the grinding mechanism 14 moves upward from bottom to top to grind the outer circumferential surface of the iron pipe 01 through the reciprocating lead screw 13. While the grinding mechanism 14 is moving, it drives the braking rod 16 to move. After grinding, the power gear 11 rotates to drive the gear to rotate, causing the rotating sleeve 10 to rotate. The rotating sleeve 10 rotates to drive the connecting rod 12 to rotate. The connecting rod 12 rotates to drive the inner support plate 8 to contract, thereby causing the iron pipe 01 to lose its fixation, facilitating the output of the iron pipe 01, reducing the contact between the operator and the equipment and the iron pipe 01 during the grinding process, and reducing the risk of safety accidents caused by improper operation.

[0023] Please refer to Figures 1-9 , on the basis of the above embodiment, in another embodiment of the present invention, wherein, inside the fixing frame 1, there is a support device for assisting in grinding the iron pipe 01 and an output device for automatically discharging the iron pipe 01. The auxiliary device includes a sliding rod 20 and a brush plate 21. The sliding rod 20 is slidably installed on the inner wall of the chute plate 15, and the brush plate 21 is fixedly installed on the surface of the sliding rod 20. The outer wall of the iron pipe 01 is cleaned by the movement of the brush plate 21. A large amount of iron filings and debris will be generated during the grinding process. If these debris are not removed in time, they may be embedded in the surface of the iron pipe 01, affecting the surface quality of the iron pipe 01 and subsequent processing.

[0024] The auxiliary device further includes a fixing block 22 and a stabilizing plate 23. The fixing block 22 is fixedly installed on the top of the grinding mechanism 14. The stabilizing plate 23 is slidably installed inside the fixing block 22. A third spring is provided between the stabilizing plate 23 and the fixing block 22. The third spring enables the stabilizing plate 23 to adapt to the radius of the iron pipe 01. The top of the stabilizing plate 23 is beveled. Pulleys are arranged on the inner wall of the stabilizing plate 23, which can keep the iron pipe 01 stable during the grinding process, reduce problems such as uneven grinding or scratches caused by the shaking of the iron pipe 01, and thus improve the grinding accuracy and surface quality.

[0025] The output device includes a support plate 30, a triangular block 31, a driving rod 32 and a limiting rod 33. The support plate 30 is slidably installed on the surface of the fixing frame 1. A fourth spring is provided between the support plate 30 and the fixing frame 1. The fourth spring enables the support plate 30 to lose and obtain the supporting effect on the iron pipe 01. The triangular block 31 is slidably installed on the surface of the fixing frame 1. A fifth spring is provided between the triangular block 31 and the fixing frame 1. The fifth spring enables the triangular block 32 to reset. The driving rod 32 is slidably installed inside the chute plate 15. A sixth spring is provided between the driving rod 32 and the chute plate 15. The sixth spring drives the driving rod 32 to reset. The limiting rod 33 is fixedly installed at the bottom of the driving rod 32, reducing the direct contact between personnel and the iron pipe 01 and lowering the risk of injury to personnel caused by factors such as the high temperature on the surface of the iron pipe 01 and sharp edges.

[0026] The output device further includes a discharge cylinder 34, a rubber block 35 and a hydraulic rod 36. The discharge cylinder 34 is fixedly installed inside the fixing frame 1. The rubber block 35 is rotatably installed inside the discharge cylinder 34. A second torsion spring is provided between the rubber block 35 and the discharge cylinder 34. The second torsion spring enables the rubber block 35 to buffer the output of the iron pipe 01. The hydraulic rod 36 is arranged on the surface of the fixing frame 1. A rubber plate is provided at the top of the hydraulic rod 36 to prevent the iron pipe 01 from being directly dropped and damaged.

[0027] During the operation of this embodiment, when the grinding mechanism 14 is grinding, the braking rod 16 moves to contact the sliding rod 20, causing the sliding rod 20 to move upward. The movement of the sliding rod 20 drives the movement of the brush plate 21. Through the movement of the brush plate 21, the outer wall of the iron pipe 01 is cleaned. A large amount of iron filings and debris will be generated during the grinding process. If these debris are not removed in time, they may be embedded in the surface of the iron pipe 01, affecting the surface quality of the iron pipe 01 and subsequent processing. While the grinding mechanism 14 is moving, it drives the fixed block 22 to move. The movement of the fixed block 22 drives the movement of the stabilizing plate 23. When the iron pipe 01 is placed, the outer wall of the iron pipe 01 contacts the inclined surface of the stabilizing plate 23, causing the stabilizing plate 23 to move and compress the third spring at the same time. Under the action of the third spring, the stabilizing plate 23 drives the pulley to adaptively support the outer circumferential surface of the iron pipe 01. The support can keep the iron pipe 01 stable during the grinding process, reducing problems such as uneven grinding or scratches caused by the shaking of the iron pipe 01, thereby improving the grinding accuracy and surface quality; The fifth spring at the triangular block 31 is in a compressed state initially. The iron pipe 01 is placed on the top of the support plate 30, and the support plate 30 supports the bottom of the iron pipe 01. When the grinding mechanism 14 moves to the uppermost position, the sliding rod 20 contacts the driving rod 32, causing the driving rod 32 to move upward. The movement of the driving rod 32 drives the limiting rod 33 to move upward. The movement of the limiting rod 33 causes the fifth spring to be released, causing the support plate 30 to move away from the support of the bottom of the iron pipe 01. At this time, the iron pipe 01 will slide downward. During the process of the iron pipe 01 sliding downward automatically after grinding, the direct contact between the personnel and the iron pipe 01 is reduced, and the risk of injury to the personnel caused by factors such as the high temperature and sharp edges on the surface of the iron pipe 01 is reduced. The iron pipe 01 will contact the rubber block 35 during the sliding process and be buffered by the second torsion spring during the falling process of the iron pipe 01, and finally contact the rubber plate and be buffered by the hydraulic rod 36 to prevent the iron pipe 01 from being damaged due to direct falling.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ductile iron pipe machining device, comprising a fixing frame (1) and an iron pipe (01), characterized in that: The iron pipe (01) is arranged inside the fixing frame (1), and the upper and lower inner walls of the fixing frame (1) are both rotatably mounted with rotating rods (2), and also include a grinding device; The grinding device comprises a limit rod (3), a pressure rod (4), a driving disk (5), a round rod (6), a fixed sleeve (7), an inner support plate (8), a chassis (9), a reciprocating screw rod (13) and a grinding mechanism (14), wherein the limit rod (3) is slidably mounted on the inner walls of the rotating rods (2) on both sides, the pressure rod (4) is slidably mounted on the inner walls of the rotating rods (2) on both sides, a first clamping groove is provided on the circumferential surface of the driving disk (5), the round rod (6) is fixedly mounted on the output end of the driving disk (5), the fixed sleeve (7) is fixedly mounted on the circumferential surface of the round rod (6), the inner support plate (8) is slidably mounted on the inner wall of the fixed sleeve (7), the chassis (9) is rotatably mounted on the bottom of the round rod (6), a second clamping groove is provided on the circumferential surface of the chassis (9), the reciprocating screw rod (13) is arranged on the inner wall of the fixed frame (1), and the grinding mechanism (14) is threadedly mounted on the circumferential surface of the reciprocating screw rod (13); Wherein, the interior of the fixing frame (1) is provided with a supporting device for assisting in the grinding of the iron pipe (01) and an output device for automatically discharging the iron pipe (01).

2. A ductile iron pipe machining device according to claim 1, characterized in that: Both sides of the limit rod (3) close to the slot are arranged as inclined surfaces, and one side of the limit rod (3) close to the pressure rod (4) is arranged as an inclined surface. A No. 1 torsion spring is arranged between the rotating rod (2) and the fixing frame (1), a No. 1 spring is arranged between the limit rod (3) and the rotating rod (2), a No. 1 return spring is arranged between the pressure rod (4) and the rotating rod (2), a No. 2 spring is arranged between the fixing sleeve (7) and the inner support plate (8), and the top of the inner support plate (8) is arranged as an inclined surface.

3. A ductile iron pipe machining device according to claim 2, characterized in that: The grinding device further comprises a rotating sleeve (10), a power gear (11) and a connecting rod (12); the rotating sleeve (10) is sleeved on the circumferential surface of the round rod (6); a gear is arranged on the circumferential surface of the rotating sleeve (10); the power gear (11) is arranged on the surface of the chassis (9); the power gear (11) meshes with the gear; one side of the connecting rod (12) is rotatably mounted on the surface of the inner support plate (8); and the other side of the connecting rod (12) is rotatably mounted on the top of the rotating sleeve (10).

4. A ductile iron pipe machining device according to claim 3, characterized in that: The grinding device further comprises a slide plate (15) and a brake rod (16), wherein the slide plate (15) is fixedly mounted on the inner wall of the fixing frame (1), one side of the brake rod (16) is fixedly mounted on the surface of the grinding mechanism (14), and the other side of the brake rod (16) is slidably mounted on the inner wall of the slide plate (15).

5. A ductile iron pipe machining device according to claim 4, characterized in that: The auxiliary device comprises a sliding rod (20) and a brush plate (21); the sliding rod (20) is slidably mounted on the inner wall of the slide groove plate (15); and the brush plate (21) is fixedly mounted on the surface of the sliding rod (20).

6. A ductile iron pipe machining device according to claim 5, characterized in that: The auxiliary device further comprises a fixed block (22) and a stabilizing plate (23), wherein the fixed block (22) is fixedly mounted on the top of the grinding mechanism (14), and the stabilizing plate (23) is slidably mounted on the inner wall of the fixed block (22), a No. 3 spring is arranged between the stabilizing plate (23) and the fixed block (22), the top of the stabilizing plate (23) is arranged as an inclined surface, and a pulley is arranged on the inner wall of the stabilizing plate (23).

7. A ductile iron pipe machining device according to claim 6, characterized in that: The output device comprises a support plate (30), a triangular block (31), a driving rod (32) and a limiting rod (33); the support plate (30) is slidably mounted on the surface of a fixing frame (1); a No. 4 spring is arranged between the support plate (30) and the fixing frame (1); the triangular block (31) is slidably mounted on the surface of the fixing frame (1); a No. 5 spring is arranged between the triangular block (31) and the fixing frame (1); the driving rod (32) is slidably mounted on the inner wall of a slide plate (15); a No. 6 spring is arranged between the driving rod (32) and the slide plate (15); and the limiting rod (33) is fixedly mounted on the bottom of the driving rod (32).

8. A ductile iron pipe machining device according to claim 7, characterized in that: The output device further comprises a discharge barrel (34), a rubber block (35) and a hydraulic rod (36); the discharge barrel (34) is fixedly mounted on the inner wall of the fixed frame (1); the rubber block (35) is rotatably mounted on the inner wall of the discharge barrel (34); a second torsion spring is arranged between the rubber block (35) and the discharge barrel (34); the hydraulic rod (36) is arranged on the surface of the fixed frame (1); and a rubber plate is arranged on the top of the hydraulic rod (36).

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