An adjustable seamless tube lumen protector spray device

Abstract

The application discloses a kind of adjustable seamless pipe inner cavity protective agent spraying devices, comprising: spray head assembly, first connecting plate, connecting bolt, first hand wheel, first transmission shaft, first coupling, corner box, second coupling, second transmission shaft, third coupling, elevator, second hand wheel, screw rod bearing seat, screw rod, C slide, roller assembly, screw rod nut assembly, second connecting plate, base, composition spray head assembly and cantilever support structure, transverse movement component, lifting assembly;The device can realize the accurate adjustment of spray head up and down and front and back two directions, and realize the uniform spiral divergence spraying of protective agent by spray head assembly structure, so as to improve the spraying quality, reduce equipment failure rate and reduce internal rolling scar defects.

Description

Technical Field

[0001] This invention relates to the field of electromechanical technology, specifically to an adjustable seamless pipe inner cavity protective agent spraying device, used to uniformly spray borax-based protective agents onto the inner cavity surface of the pierced capillary tube during the seamless steel pipe piercing process. Background Technology

[0002] During the piercing process of seamless steel pipes, an antioxidant (usually borax) needs to be sprayed into the inner cavity of the pierced tube to reduce the formation of iron oxide scale in the inner cavity of the tube and improve the surface quality of the steel pipe during rolling.

[0003] Currently, the spraying equipment commonly used in PQF production lines is installed along with the perforating machine, and its design range is Φ294~Φ460 hole type. The existing spraying device mainly includes: a fixed frame, two vertical adjusting screws, a nozzle mounting base, and a nozzle pipe with a conical ejector pin installed at the outlet. The height adjustment method is: the operator manually rotates the two adjusting screws, causing the nozzle mounting base to move up and down along the vertical screws, thereby achieving a rough adjustment of the nozzle height.

[0004] However, the existing equipment has the following shortcomings: 1. Insufficient adjustment freedom; the existing equipment can only move the nozzle up and down through the lead screw, and the nozzle cannot be adjusted in the horizontal forward and backward direction; when producing capillary tubes of different specifications (especially Φ241 and Φ538 orifice types), it is difficult for the nozzle to be aligned with the central axis of the capillary tube, resulting in a large amount of antioxidant splashing and waste, poor spraying effect, and seriously affecting the quality of the inner surface of the tube; 2. Unreasonable nozzle structure design; the existing equipment only installs a tapered pin at the pipe outlet as a diverging element, and the protective agent flow is dispersed by the conical surface of the pin to achieve dispersion; this structure has defects such as fixed and unadjustable divergence angle, uneven dispersion, and severe wear of the pin due to direct impact from high-speed particles, resulting in a high equipment failure rate; 3. Lack of quick replacement function; the nozzle of the existing equipment is a fixed structure, and when producing capillary tubes of different specifications, it is impossible to quickly replace the appropriate nozzle, which further aggravates the problem of uneven spraying.

[0005] The above problems are prominent in actual production: From January to October 2023, a production line experienced 44 shutdowns due to adjustments in the antioxidant spraying equipment and nozzle malfunctions, averaging 4.4 times per month; the cumulative downtime was 496 minutes, averaging 49.6 minutes per month; the resulting internal rolling scar incidence rate was as high as 1.18%, which seriously affected production efficiency and product quality. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of existing spraying devices, such as insufficient adjustment freedom, poor nozzle dispersion effect, and inability to be quickly replaced, and to provide an adjustable seamless tube inner cavity protective agent spraying device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an adjustable seamless pipe inner cavity protective agent spraying device, characterized in that it includes: a spray head assembly, a first connecting plate, connecting bolts, a first handwheel, a first drive shaft, a first coupling, an angle box, a second coupling, a second drive shaft, a third coupling, a lift, a second handwheel, a lead screw bearing seat, a lead screw, a C-shaped slide, a roller assembly, a lead screw nut assembly, a second connecting plate, and a base; The nozzle assembly is a spraying execution component located at the top of the entire device. The nozzle assembly 1 is fixed to the upper end of the first connecting plate and the upper end of the second connecting plate. The first connecting plate and the second connecting plate are parallel and symmetrically arranged, both of which are inclined and together form a cantilever support structure. The upper ends of the first connecting plate and the second connecting plate clamp and fix the nozzle assembly, and the lower ends of the two are fastened to the roller assembly. The cantilever support structure transfers the entire load of the nozzle assembly to the roller assembly through the connecting plates. The C-shaped slide is horizontally fixed to the upper surface of the base; the roller assembly is installed on the C-shaped slide, and the upper surface of the roller assembly is fixedly connected to the lead screw nut assembly by connecting bolts; the bases are installed at both ends of the C-shaped slide, and the lead screw bearing seats are fixed on the bases. The lead screw is horizontally arranged and rotatably assembled between two sets of lead screw bearing seats, which provide rotational support and positioning for the lead screw; a threaded transmission fit is formed between the lead screw and the lead screw nut assembly; a second handwheel is provided on the outer side of one end of the C-shaped slide, and the second handwheel is fixedly connected to the end of the lead screw to provide manual driving force for lateral movement; when the lead screw rotates, it drives the lead screw nut assembly, which in turn drives the roller assembly. The entire load of the first connecting plate, the second connecting plate, and the nozzle assembly moves laterally along the C-shaped slide along with the roller assembly; The first handwheel is located on the upper left side of the device and is connected to the upper end of the first drive shaft for manually inputting rotational power for adjustment. The lower end of the first drive shaft is connected to the input shaft of the angle box via a first coupling, transmitting the rotational power of the handwheel and compensating for installation coaxiality errors. The angle box is a reversing transmission component located on the lower left side of the device, converting the vertically input rotational motion into a horizontally output rotational motion. The output shaft of the angle box is connected to one end of the second drive shaft via a second coupling, and the other end of the second drive shaft is connected to the input shaft of the elevator via a third coupling, transmitting the torque after reversal. The bottom of the elevator is fixedly connected to the external frame, and the upper part of the elevator is rigidly connected to the base. After receiving the torque from the second drive shaft, the elevator drives it to perform lifting and lowering movements to adjust the height position of the nozzle assembly.

[0008] Furthermore, the nozzle assembly consists of a universal base, a restraint barrel, a ejector pin, and screws; the screws are wing bolts; the restraint barrel is fixed to the universal base by the wing bolts, enabling quick tightening and replacement; the ejector pin adopts a hyperboloidal conical diverging head structure; the restraint barrel is equipped with helical blades inside, and the hyperboloidal conical diverging head is installed at the outlet end of the restraint barrel by means of threads and can be adjusted back and forth.

[0009] Furthermore, the nozzle assembly is made of low-alloy steel that has undergone quenching and tempering treatment.

[0010] The beneficial effects of this invention are: 1. Flexible adjustment and precise positioning: The nozzle can be adjusted up and down through the transmission mechanism of the lifting platform and the corner box, while the nozzle can be adjusted forward and backward through the screw nut pair, C-shaped slide and roller assembly. It can be adjusted independently and precisely in both directions, with the adjustment accuracy controllable within millimeters. This allows the nozzle to be accurately aligned with the center axis of different specifications of capillary tubes, effectively avoiding antioxidant splashing waste and uneven spraying caused by poor nozzle alignment. 2. Uniform spraying and excellent dispersion effect; abandoning the simple method of dispersion by simply relying on the impact of the conical pin in the existing technology, the spiral blade is used to make the protective agent form a rotating flow in the confinement tube, and then uniformly sprayed out through the hyperboloid conical dispersion head, realizing the spiral dispersion spraying effect of the protective agent, with complete and uniform coverage, effectively avoiding quality defects such as scabs on the inner surface of the capillary tube caused by uneven spraying. 3. High adaptability and quick changeover: It is equipped with three quick-change nozzles for different capillary tube specifications, and tool-free quick installation and removal are achieved through wing bolts. The nozzle replacement can be completed simultaneously within the process time of changing the orifice type, which greatly improves the switching efficiency between different specifications of products. 4. Long service life and stable operation: To address the problem of large antioxidant particles causing severe impact on pipelines and nozzles, low-alloy steel is used for heat treatment of nozzle components, which significantly improves the wear resistance and impact resistance of the nozzles, extends their service life, and reduces equipment downtime. 5. Significantly reduced failure rate and improved product quality: Actual production verification shows that this equipment has been operating stably since it was put into use in May 2024. The average monthly adjustment time of the equipment has been reduced from 49.6 minutes before the improvement to 12.3 minutes / month; the incidence of internal rolling marks has been reduced from 1.18% before the improvement to 0.818%. Production efficiency and product quality have been significantly improved. The annual comprehensive economic benefit of one production line is expected to be about RMB 178,000. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall assembly structure of the present invention; Figure 2This is a schematic diagram of the nozzle assembly of the present invention.

[0012] In the diagram, 1. Nozzle assembly, 2. First connecting plate, 3. Connecting bolt, 4. First handwheel, 5. First drive shaft, 6. First coupling, 7. Angle box, 8. Second coupling, 9. Second drive shaft, 10. Third coupling, 11. Lifting mechanism, 12. Second handwheel, 13. Screw bearing seat, 14. Screw, 15. C-type slide rail, 16. Roller assembly, 17. Screw nut assembly, 18. Second connecting plate, 19. Base, 20. Universal base, 21. Restraint barrel, 22. Ejector pin, 23. Screw. Detailed Implementation

[0013] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings.

[0014] like Figure 1 , 2 As shown, an adjustable seamless pipe inner cavity protective agent spraying device includes the following overall structure: spray head assembly 1, first connecting plate 2, connecting bolt 3, first handwheel 4, first drive shaft 5, first coupling 6, corner box 7, second coupling 8, second drive shaft 9, third coupling 10, lifting mechanism 11, second handwheel 12, lead screw bearing seat 13, lead screw 14, C-shaped slide rail 15, roller assembly 16, lead screw nut assembly 17, second connecting plate 18, and base 19; 1. Nozzle assembly and cantilever support structure The nozzle assembly 1 is the spraying execution component and is located at the top of the entire device. The nozzle assembly 1 is fixedly installed on the upper end of the first connecting plate 2 and the upper end of the second connecting plate 18 by bolts. The first connecting plate 2 and the second connecting plate 18 are parallel and symmetrically arranged, both of which are inclined and together form a cantilever support structure. The upper ends of the first connecting plate 2 and the second connecting plate 18 clamp and fix the nozzle assembly 1, and the lower ends of the two are fastened to the roller assembly 16 by bolts. This cantilever structure transfers the entire load of the nozzle assembly 1 to the roller assembly 16 through the connecting plates. 2. Lateral movement component (forward and backward adjustment) The C-shaped slide rail 15 is horizontally fixedly installed on the upper surface of the base 19; the roller assembly 16 is installed on the C-shaped slide rail 15 with rollers rotating on it. The roller assembly 16 is fixedly connected to the lead screw nut assembly 17, the first connecting plate 2, and the second connecting plate 18 by connecting bolts 3, and they move synchronously together; the two ends of the C-shaped slide rail 15 are fixed on the base 19 respectively, the lead screw bearing seat 13 is fixed on the base 19, and the lead screw 14 is arranged horizontally and rotatably assembled between the two sets of lead screw bearing seats 13. The lead screw bearing seats 13 provide rotational support and positioning for the lead screw 14; the lead screw 14 and the lead screw nut assembly 17 are fixedly installed on the upper surface of the base 19 by connecting bolts 3, and they move synchronously together; the two ends of the C-shaped slide rail 15 are fixedly installed on the base 19 by connecting bolts 3, and they move synchronously together by connecting bolts 3, connecting bolts 4, connecting bolts 5, connecting bolts 6, connecting bolts 7, connecting bolts 8, connecting bolts 9, connecting bolts 10, connecting bolts 11, connecting bolts 12, connecting bolts 13, connecting bolts 14, connecting bolts 14, connecting bolts 14, connecting bolts 15, connecting bolts 16, connecting bolts 17, connecting bolts 18, connecting bolts 19, connecting bolts 12, connecting bolts 13, connecting bolts 14, connecting bolts 14, connecting bolts 15, connecting bolts 16, connecting bolts 17, connecting bolts 18, connecting bolts 19, connecting bolts 19, connecting bolts 19, connecting bolts 19, connecting bolts 19, connecting bolts 19, connecting bolts 19, connecting bolts 19 The female assemblies 17 form a threaded transmission fit; the second handwheel 12 is arranged on the outer side of one end of the C-shaped slide 15, and the second handwheel 12 is fixedly connected to the end of the lead screw 14 to provide manual driving force for lateral movement; the C-shaped slide 15 bears the entire load of the upper first connecting plate 2, the second connecting plate 18 and the nozzle assembly 1; when the lead screw 14 rotates, it drives the lead screw nut assembly 17, and then drives the roller assembly 16. The entire load of the first connecting plate 2, the second connecting plate 18 and the nozzle assembly 1 moves laterally along the C-shaped slide 15 together with the roller assembly 16. 3. Lifting assembly (adjustable vertically) The first handwheel 4 is located on the upper left side of the device. Its lower end is rigidly connected to the upper end of the first drive shaft 5, used for manually inputting rotational power for adjustment. The first drive shaft 5 is vertically arranged, with its upper end connected to the first handwheel 4 and its lower end connected to the input shaft of the angle box 7 via the first coupling 6, transmitting the rotational power of the handwheel and compensating for installation coaxiality errors. The angle box 7 is a reversing transmission component, located on the lower left side of the device. The angle box 7 converts the vertically input rotational motion into a horizontally output rotational motion. The output of the angle box 7... The shaft is connected to one end of the second drive shaft 9 via the second coupling 8; the second drive shaft 9 is arranged horizontally, and the other end of the second drive shaft 9 is connected to the input shaft of the lifting platform 11 via the third coupling 10 to transmit the torque after reversal; the bottom of the lifting platform 11 is used to fix it to the external frame, and the upper part of the lifting platform 11 is rigidly connected to the base 19; after receiving the torque transmitted from the second drive shaft 9, the lifting platform 11 drives the upper load-bearing part (including the base 19 and all components on it) to perform lifting and lowering movements, thereby adjusting the height position of the nozzle assembly 1; 4. Nozzle assembly structure The nozzle assembly 1 consists of a universal base 20, a restraint barrel 21, an ejector pin 22, and screws 23; the screws 23 are wing bolts; the restraint barrel 21 is fixed to the universal base 20 by wing bolts to achieve quick fastening and replacement; the ejector pin 22 adopts a hyperboloidal conical diverging head structure; the restraint barrel 21 is equipped with helical blades inside, and the hyperboloidal conical diverging head is installed at the outlet end of the restraint barrel 21 by threads and can be adjusted back and forth; 5. Quick fastening and replacement For nozzles with diameters of Φ241 to Φ538, the nozzle assembly is divided into three grades: Grade 1 corresponds to hole types below Φ294, Grade 2 corresponds to hole type Φ383, and Grade 3 corresponds to hole type Φ406 to Φ538. All nozzles use the same universal base 4 and can be quickly fastened and replaced by wing bolts (connecting bolts 3). 6. Materials The nozzle-related components (including the restraint barrel, the diffuser head, etc.) are made of low alloy steel through quenching and tempering.

[0015] The adjustable seamless pipe inner cavity protective agent spraying device of the present invention operates as follows: 1. Horizontal position adjustment (forward and backward adjustment) The operator rotates the second handwheel 12, which drives the lead screw 14 to rotate. The lead screw 14 drives the lead screw nut assembly 17 to move along the lead screw axis through the threaded engagement. The lead screw nut assembly 17 drives the roller assembly 16 to slide horizontally along the C-shaped slide rail 15. The roller assembly 16 then drives the first connecting plate 2, the second connecting plate 18, and the nozzle assembly 1 to move laterally together, completing the precise adjustment of the horizontal front and rear position of the nozzle assembly 1. 2. Height adjustment (vertical adjustment) The operator rotates the first handwheel 4, and the rotational power is transmitted sequentially through the first drive shaft 5 and the first coupling 6 to the corner box 7, which completes the change of movement direction (from vertical to horizontal). The power after the change of direction is transmitted sequentially through the second coupling 8, the second drive shaft 9, and the third coupling 10 to the lifting platform 11. After receiving the torque, the lifting platform 11 drives the base 19 above it and all the components installed on the base (including the C-shaped slide 15, the roller assembly 16, the first connecting plate 2, the second connecting plate 18, and the nozzle assembly 1, etc.) to move up and down as a whole, so as to realize the height adjustment of the nozzle assembly 1. The two adjustment modes mentioned above are independent of each other and do not interfere with each other. Operators can quickly adjust the nozzle assembly 1 to the target spraying position according to the capillary specifications. 3. Spraying process The protective agent (borax) enters the nozzle assembly 1 through the delivery pipeline. Under the action of the spiral blades inside the restraint barrel 21, it generates a rotating motion and is evenly distributed. Then, it is sprayed out in a spiral shape at a certain angle through the hyperboloid conical diverging head, forming a spray flow that evenly covers the entire circumference of the capillary tube cavity. When different specifications of capillary tubes need to be produced, the butterfly bolts can be loosened to quickly replace the nozzle of the corresponding specification and grade. The spray angle can be finely adjusted by adjusting the axial position of the diverging head. The diverging head adopts a hyperboloid conical head to achieve the divergence of the antioxidant spray flow at a certain angle. It is sprayed out by rotating under the action of the spiral blades in the restraint barrel, achieving the purpose of uniformly spraying the antioxidant into the cavity. The diverging head can be adjusted back and forth to meet the needs of fine adjustment of the antioxidant spray flow.

[0016] It should be understood that any technical features not elaborated in detail in this specification belong to the prior art. Although the embodiments of this invention have been described above in conjunction with the accompanying drawings, this invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this invention without departing from the spirit and scope of the claims, and these all fall within the scope of protection of this invention.

Claims

1. An adjustable seamless pipe inner cavity protective agent spraying device, characterized in that, include: Nozzle assembly, first connecting plate, connecting bolts, first handwheel, first drive shaft, first coupling, angle box, second coupling, second drive shaft, third coupling, elevator, second handwheel, lead screw bearing seat, lead screw, C-shaped slide, roller assembly, lead screw nut assembly, second connecting plate, base; The nozzle assembly is a spraying execution component located at the top of the entire device. The nozzle assembly 1 is fixed to the upper end of the first connecting plate and the upper end of the second connecting plate. The first connecting plate and the second connecting plate are parallel and symmetrically arranged, both of which are inclined and together form a cantilever support structure. The upper ends of the first connecting plate and the second connecting plate clamp and fix the nozzle assembly, and the lower ends of the two are fastened to the roller assembly. The cantilever support structure transfers the entire load of the nozzle assembly to the roller assembly through the connecting plates. The C-shaped slide is horizontally fixed to the upper surface of the base; the roller assembly is installed on the C-shaped slide, and the upper surface of the roller assembly is fixedly connected to the lead screw nut assembly by connecting bolts; the bases are installed at both ends of the C-shaped slide, and the lead screw bearing seats are fixed on the bases. The lead screw is horizontally arranged and rotatably assembled between two sets of lead screw bearing seats, which provide rotational support and positioning for the lead screw; a threaded transmission fit is formed between the lead screw and the lead screw nut assembly; a second handwheel is provided on the outer side of one end of the C-shaped slide, and the second handwheel is fixedly connected to the end of the lead screw to provide manual driving force for lateral movement; when the lead screw rotates, it drives the lead screw nut assembly, which in turn drives the roller assembly. The entire load of the first connecting plate, the second connecting plate, and the nozzle assembly moves laterally along the C-shaped slide along with the roller assembly; The first handwheel is located on the upper left side of the device and is connected to the upper end of the first drive shaft for manually inputting rotational power for adjustment. The lower end of the first drive shaft is connected to the input shaft of the angle box via a first coupling, transmitting the rotational power of the handwheel and compensating for installation coaxiality errors. The angle box is a reversing transmission component located on the lower left side of the device, converting the vertically input rotational motion into a horizontally output rotational motion. The output shaft of the angle box is connected to one end of the second drive shaft via a second coupling, and the other end of the second drive shaft is connected to the input shaft of the elevator via a third coupling, transmitting the torque after reversal. The bottom of the elevator is fixedly connected to the external frame, and the upper part of the elevator is rigidly connected to the base. After receiving the torque from the second drive shaft, the elevator drives it to perform lifting and lowering movements to adjust the height position of the nozzle assembly.

2. The adjustable seamless pipe inner cavity protective agent spraying device according to claim 1, characterized in that, The nozzle assembly consists of a universal base, a restraint barrel, a ejector pin, and screws; the screws are wing bolts; the restraint barrel is fixed to the universal base by the wing bolts, enabling quick tightening and replacement; the ejector pin adopts a hyperboloidal conical diverging head structure; the restraint barrel is equipped with helical blades inside, and the hyperboloidal conical diverging head is installed at the outlet end of the restraint barrel by means of threads, and can be adjusted back and forth.

3. The adjustable seamless pipe inner cavity protective agent spraying device according to claim 1, characterized in that, The nozzle assembly is made of low-alloy steel that has undergone quenching and tempering treatment.

Images