Cooler inner sleeve assembly of steel pipe spraying device

Abstract

The utility model discloses a cooler inner sleeve assembly of a steel pipe spraying device, which belongs to the technical field of steel pipe quenching processing equipment and comprises a cooler inner sleeve and a water retaining ring detachably connected to one end of the cooler inner sleeve. Mounting holes used for mounting nozzles are uniformly formed in the cooler inner sleeve along the circumferential side of the cooler inner sleeve, the mounting holes are obliquely formed, the mounting holes comprise guide holes allowing the nozzles to be inserted and threaded holes coaxially formed with the guide holes and communicated with the guide holes, and the hole diameter of the threaded holes is larger than that of the guide holes; and a through hole for a steel pipe to pass through is formed in the center of the water retaining ring. After the nozzles are installed, compared with the prior art, the distance between every two adjacent nozzles is small, and therefore the cooling effect can be improved; meanwhile, the nozzle is easy and convenient to disassemble and assemble; the steel pipe can be conveniently arranged at the position of the center shaft of the cooler through the through opening in the water retaining ring, and the device can adapt to various steel pipes with different diameters through the positioning auxiliary mechanism.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of steel pipe quenching processing equipment, specifically a cooler inner sleeve component of a steel pipe spraying device. Background Technology

[0002] When processing steel pipes, a quenching process is typically used to achieve the required physical and chemical properties. This involves heating the steel pipe to over 850°C using a high-frequency coil, then cooling it to a low temperature of 100°C within one second using a steel pipe spraying device. To further reduce the temperature to the required level in a very short time, water spray cooling is usually employed. Multiple nozzles are evenly arranged in a ring on the cooler, spraying low-temperature cooling water onto the high-temperature steel pipe at appropriate pressure and flow rate to achieve quenching.

[0003] The inner sleeve assembly of the cooler is a cylinder containing several nozzles. The nozzles are evenly arranged around the inner side of the cylinder to spray water and cool the steel pipe inserted into the cylinder. Research has found that the cooling effect of the cooler is related to the spacing between the nozzles; the smaller the spacing between two nozzles, the better the cooling effect. However, most coolers currently use threaded or stepped hole fixing methods for nozzle installation. For example, patent application number 202421545838.4 discloses a steel pipe quenching cooling device, which has irregularly shaped holes on the outer wall of the sleeve and a locking part adapted to the irregularly shaped hole at the tail of the nozzle. Through holes are opened on both sides of the locking part, and threaded holes are opened in the irregularly shaped holes. Bolts are passed through the through holes and threadedly connected to the threaded holes to fix the nozzle. This type of installation method has a large spacing between two adjacent nozzles, resulting in insufficient cooling effect, thus affecting the product qualification rate and quenching efficiency; at the same time, this method has the problem of complicated disassembly and assembly. Furthermore, the nozzles inside the cylinder are arranged in a ring without the positioning auxiliary structure of the steel pipe. If the steel pipe deviates from the central axis of the cylinder, the water flow impact force on the periphery of the steel pipe will be different, affecting the uniformity of quenching. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. It mainly provides a cooler inner sleeve assembly for a steel pipe spraying device, which solves the technical problems mentioned in the background art, such as insufficient cooling effect due to large nozzle spacing and lack of steel pipe positioning auxiliary structure.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A cooler inner sleeve assembly for a steel pipe spraying device includes a cooler inner sleeve and a water-blocking ring detachably connected to one end of the cooler inner sleeve. The cooler inner sleeve has a cylindrical structure, and mounting holes for mounting nozzles are evenly opened along its circumference. The mounting holes are inclined and include a guide hole for inserting the nozzle and a threaded hole coaxially arranged and communicating with the guide hole. The diameter of the threaded hole is larger than the diameter of the guide hole. An opening for a steel pipe to pass through is opened at the center of the water-blocking ring.

[0007] Furthermore, the inner sleeve of the cooler is provided with a number of guide grooves surrounding the surface of the inner sleeve of the cooler, and each guide groove is provided with mounting holes at equal intervals around its circumference.

[0008] Furthermore, the spacing between every two adjacent rings of mounting holes is 16±2mm;

[0009] And / or, the angle between two adjacent mounting holes in the same circle is 12°±0.1°.

[0010] Furthermore, sealing grooves for installing sealing rings are provided at both ends of the outer ring surface of the inner sleeve of the cooler.

[0011] Furthermore, one end of the inner sleeve of the cooler is formed with an outwardly extending ring, and the ring is provided with assembly and fastening holes.

[0012] Furthermore, the water-blocking ring includes a convex ring, a hollow ring body, and a retaining ring connected in sequence. The cross-section of the hollow ring body is "L" shaped. The convex ring extends to the outside of the hollow ring body. The outer contour of the retaining ring is trumpet-shaped. Two guide holes are equally spaced on the ring surface of the hollow ring body connecting to the retaining ring. A notch is opened on one side of both the hollow ring body and the convex ring.

[0013] Furthermore, the maximum outer diameter of the hollow annulus is adapted to the inner diameter of the cooler inner sleeve;

[0014] And / or, the inner diameter of the convex ring is larger than the inner diameter of the hollow ring body;

[0015] And / or, the inner diameter of the retaining ring gradually decreases from the side connecting the hollow ring to its opposite side.

[0016] Furthermore, the convex ring is provided with assembly and fastening holes.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] (1) In this invention, the mounting hole is designed as an interconnected guide hole and a threaded hole, with the diameter of the threaded hole being larger than that of the guide hole. When installing the nozzle, the nozzle is first inserted into the guide hole through the threaded hole, and then tightened in the threaded hole with a hollow set screw to press the nozzle in place, or it can be tightened onto the threaded hole using the screw connection on the nozzle itself, thus completing the installation of the nozzle. Compared with the prior art, the width of the mounting hole is significantly reduced, resulting in a smaller distance between each pair of adjacent nozzles, thereby improving the cooling effect.

[0019] (2) In this utility model, the nozzle only needs to be disassembled and assembled at one threaded connection (i.e., the threaded connection with the threaded hole), which is relatively simple to operate.

[0020] (3) The opening on the baffle ring in this utility model makes it easy to place the steel pipe at the central axis of the cooler, so that the nozzles on the periphery can achieve uniform water cooling on the periphery of the steel pipe; at the same time, the baffle ring can prevent the sprayed cooling water from splashing to the outside of the cooler.

[0021] (4) The optimized solution of this utility model also includes a positioning auxiliary mechanism. Through the limiting plate with different sized limiting ports, it can adapt to a variety of steel pipes of different diameters, so that the steel pipe is located at the central axis position of the inner sleeve of the cooler.

[0022] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention in Embodiment 1;

[0024] Figure 2 This is a front view of the cooler inner sleeve;

[0025] Figure 3 This is a sectional view of the inner sleeve of the cooler;

[0026] Figure 4 This is a three-dimensional structural diagram of the water-retaining ring;

[0027] Figure 5 This is a cross-sectional view of the water-retaining ring;

[0028] Figure 6 This is a schematic diagram illustrating the installation and application of this utility model;

[0029] Figure 7 This is a three-dimensional structural diagram of the present invention in Embodiment 3;

[0030] Figure 8 This is an enlarged schematic diagram of the positioning auxiliary mechanism.

[0031] Reference numerals in the attached drawings: 1. Cooler inner sleeve; 11. Ring; 12. Sealing groove; 13. Guide groove; 14. Mounting hole; 141. Threaded hole; 142. Guide hole; 2. Water baffle ring; 21. Hollow ring body; 22. Convex ring; 23. Retaining ring; 24. Guide hole; 25. Notch; 26. Through port; 3. Nozzle; 4. Positioning auxiliary mechanism; 41. Fixed shaft; 42. Rotating ring; 43. Limiting plate; 44. Limiting port. Detailed Implementation

[0032] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] Example 1: Please refer to the appendix for details. Figure 1 A cooler inner sleeve assembly for a steel pipe spraying device includes a cooler inner sleeve 1 and a water baffle ring 2, specifically:

[0036] Please refer to the attached document carefully. Figure 1 -Appendix Figure 3The inner sleeve 1 of the cooler has a cylindrical structure, and one end of it is formed with an outwardly extending ring 11. The ring 11 has assembly and fastening holes for connection and installation. Both ends of the outer ring surface of the main body of the inner sleeve 1 of the cooler have sealing grooves 12 for installing sealing rings. The sealing rings can achieve sealing at the joint between the inner sleeve 1 and the outer sleeve of the cooler. The main body of the inner sleeve 1 of the cooler has several guide grooves 13 surrounding the surface of the inner sleeve 1 between the two sealing grooves 12, and each guide groove 13... The inner sleeve of the cooler has inclined mounting holes 14 at equal intervals around its circumference. Each mounting hole 14 includes a guide hole 142 and a threaded hole 141 that are interconnected and coaxially arranged. The diameter of the threaded hole 141 is larger than the diameter of the guide hole 142. The threaded hole 141 penetrates the outer side of the inner sleeve 1 of the cooler, and the guide hole 142 penetrates the inner side of the inner sleeve 1 of the cooler. When installing the nozzle 3, the nozzle 3 is placed in the guide hole 142 and fixed in the threaded hole 141 with a hollow set screw.

[0037] Please refer to the attached document carefully. Figure 4 -Appendix Figure 5 A water-blocking ring 2 is coaxially inserted into one end of the inner sleeve 1 of the cooler. The water-blocking ring 2 includes a hollow ring body 21 with an "L"-shaped cross-section. The maximum outer diameter of the hollow ring body 21 is adapted to the inner diameter of the inner sleeve 1 of the cooler. One end of the hollow ring body 21 is formed with an outwardly extending convex ring 22. The inner diameter of the convex ring 22 is larger than the inner diameter of the hollow ring body 21. The convex ring 22 has assembly and fastening holes for connection and installation. A baffle ring 23 to prevent water splashing is connected to the side of the hollow ring body 21 opposite to the convex ring 22. The outer contour is trumpet-shaped, and the inner diameter of the retaining ring 23 gradually decreases from the side connecting the hollow ring 21 to the opposite side. Two guide holes 24 are evenly spaced on the ring surface of the hollow ring 21 connecting to the retaining ring 23. The end face of the retaining ring 23 facing away from the hollow ring 21 provides a large blocking area, thereby reducing water splashing into the steel pipe portion that has not fully entered the cooling channel. Even if water splashes into the guide tube, it can quickly flow out through the guide holes 24, preventing premature temperature drop in the steel pipe itself. The hollow ring 21, the convex ring 22, and the retaining ring 23 are all ring structures, and their inner sides form openings 26 for the steel pipe to pass through. A notch 25 is provided on one side of the hollow ring 21 and the convex ring 22 to facilitate the discharge of cooling wastewater from the inner sleeve 1 of the cooler.

[0038] In this embodiment, a total of 16 rings of mounting holes 14 are provided, with 30 mounting holes in each ring. After the nozzles 3 are installed, the nozzles 3 are inclined along the length of the cooler inner sleeve 1, and the angle between the axis of the nozzle 3 and the axis of the cooler inner sleeve 1 is 60°. The angle between two adjacent nozzles 3 on the same ring is 12°±0.1°, ensuring that the water outlet paths of the nozzles 3 in each ring precisely intersect on the axis of the cooler inner sleeve 1. The mounting holes 14 are staggered by an angle of 6°±0.1°, and the distance between two adjacent rings of mounting holes 14 is 18mm.

[0039] During assembly, insert each nozzle 3 into the guide hole 142 through the threaded hole 141, one by one, until the sealing ring at its tail abuts against the end face of the threaded hole 141. Then, tighten the hollow set screw into the threaded hole 141 to press the nozzle 3 firmly, thus completing the installation of the nozzle 3. (See attached...) Figure 6 As shown, the water baffle ring 2 is inserted into one end of the cooler inner sleeve 1, and the water baffle ring 2 is fixed to the cooler inner sleeve 1 with screws through the assembly fastening holes on the convex ring 22. At this time, the convex ring 22 fits against the end face of the ring 11. After installing the sealing ring in the sealing groove 12, the cooler outer sleeve is put on the outside of the cooler inner sleeve 1 from the end facing away from the ring 11, and the cooler inner sleeve 1 and the cooler outer sleeve are fixedly connected with screws through the assembly fastening holes on the ring 11. At this time, one side of the cooler outer sleeve fits against the ring 11, and the two end panels of the cooler outer sleeve are just tightly fitted with the sealing ring. A circular water cavity is formed between the cooler outer sleeve and the cooler inner sleeve 1. All the mounting holes 14 are connected to the water cavity. The water in the water cavity can enter the nozzle 3 through the through hole in the hollow set screw. When in use, first start the steel pipe spraying device, send water into the water chamber through the water inlet pipe 2, and spray the water out through the nozzle 3; then insert the steel pipe heated to high temperature into the central shaft position of the inner sleeve 1 of the cooler. At this time, the nozzle 3 evenly surrounds the steel pipe to spray water to cool the steel pipe.

[0040] Example 2: The difference between this example and Example 1 is that:

[0041] In this embodiment, the nozzle 3 is made of an integral nozzle with threaded parts (thread + Teflon tape sealing). When installing the nozzle 3, it can be screwed into the threaded hole 141 through its own screw part, eliminating the need for the use of hollow set screws.

[0042] In this embodiment, the spacing between every two adjacent rings of mounting holes 14 is 16mm.

[0043] Everything else is the same as in Example 1.

[0044] Example 3: The difference between this example and Example 2 is that:

[0045] In this embodiment, please refer to the appendix for details. Figure 7 -Appendix Figure 8 A positioning auxiliary mechanism 4 is installed on the outer end face of the water baffle ring 2 to assist the steel pipe in being positioned at the central axis of the inner sleeve 1 of the cooler. The positioning auxiliary mechanism 4 includes multiple (at least two) limiting plates 43 with their upper ends hinged to the water baffle ring 2. The multiple limiting plates 43 can be overlapped and fitted in sequence. Each of the multiple limiting plates 43 has a limiting opening 44 on its lower side to limit the steel pipe. The width of the limiting opening 44 on the multiple limiting plates 43 decreases sequentially according to the fitting order (the innermost limiting opening 44 has the largest width). The top of the limiting opening 44 is a semi-circular hole coaxial with the through opening 26, and the limiting opening 44 penetrates the limiting plate 43. The bottom of the limiting plate 43 has a width that increases sequentially according to the bonding order (the innermost limiting plate 43 has the smallest width). A horizontally fixed shaft 41 is fixed on the outer end face of the water-blocking ring 2. A pair of rotating rings 42 corresponding to the limiting plates 43 are rotatably mounted on the fixed shaft 41. The pair of rotating rings 42 closest to the center are fixedly connected to the innermost limiting plate 43 through a connecting plate. Similarly, the other limiting plates 43 are connected to the rotating rings 42 in sequence. A damping element is provided between the rotating ring 42 and the fixed shaft 41. The damping element provides a large friction force, allowing the limiting plate 43 to stay at any rotation angle. A contact block (not shown in the figure) made of high-temperature resistant material (such as austenitic stainless steel) is provided in the limiting port 44 to contact the steel pipe and limit its movement. A heat insulation material is provided between the contact block and the limiting plate 43 to prevent high temperature conduction.

[0046] In use, the limiting plate 43 adapted to the diameter of the steel pipe to be processed and the limiting plate 43 on the front side of the flipping direction (the width of the limiting port 44 on the limiting plate 43 on the front side of the flipping direction is greater than the diameter of the steel pipe) are flipped to fit the water baffle ring 2. At this time, this part of the limiting plate 43 is in a vertical state. Then, the steel pipe can be moved up from below the limiting plate 43 and inserted into the limiting port 44, so that it can adapt to steel pipes of various diameters, so that the steel pipe is located at the central axis position of the inner sleeve 1 of the cooler. In this way, the nozzles 3 on the periphery can achieve uniform water cooling of the periphery of the steel pipe.

[0047] Everything else is the same as in Example 2.

[0048] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A cooler inner sleeve assembly for a steel pipe spraying apparatus, characterized by: The device includes a cooler inner sleeve (1) and a water baffle ring (2) connected to one end of the cooler inner sleeve (1). The cooler inner sleeve (1) has a cylindrical structure. The cooler inner sleeve (1) has mounting holes (14) for mounting nozzles (3) evenly opened along its periphery. The mounting holes (14) are inclined. The mounting holes (14) include a guide hole (142) for inserting the nozzle (3) and a threaded hole (141) coaxially arranged and connected with the guide hole (142). The diameter of the threaded hole (141) is larger than the diameter of the guide hole (142). The water baffle ring (2) has a through-hole (26) for passing through a steel pipe at its center.

2. A cooler inner sleeve assembly for a steel pipe spraying apparatus according to claim 1, characterized in that: The inner sleeve (1) of the cooler is provided with a number of guide grooves (13) surrounding the surface of the inner sleeve (1), and each guide groove (13) is provided with mounting holes (14) at equal intervals around its circumference.

3. A cooler inner sleeve assembly for a steel pipe spraying apparatus according to claim 2, wherein: The spacing between every two adjacent rings of mounting holes (14) is 16±2 mm; And / or, the angle between two adjacent mounting holes (14) in the same circle is 12° ± 0.1°.

4. A cooler inner sleeve assembly for a steel pipe spraying apparatus as defined in claim 1, wherein: Both ends of the outer ring surface of the inner sleeve (1) of the cooler are provided with sealing grooves (12) for installing sealing rings.

5. A cooler inner sleeve assembly for a steel pipe spraying apparatus according to claim 4, wherein: The inner sleeve (1) of the cooler has an outwardly extending ring (11) formed at one end, and the ring (11) has an assembly fastening hole.

6. A cooler inner sleeve assembly for a steel pipe spraying apparatus according to claim 1, characterized in that: The water-blocking ring (2) includes a convex ring (22), a hollow ring body (21) and a retaining ring (23) connected in sequence. The cross-section of the hollow ring body (21) is "L" shaped. The convex ring (22) extends to the outside of the hollow ring body (21). The outer contour of the retaining ring (23) is trumpet-shaped. Two guide holes (24) are equally spaced on the ring surface of the hollow ring body (21) connecting to the retaining ring (23). A notch (25) is opened on one side of the hollow ring body (21) and the convex ring (22).

7. A cooler inner sleeve assembly for a steel pipe spraying apparatus according to claim 6, wherein: The maximum outer diameter of the hollow annulus (21) is adapted to the inner diameter of the cooler inner sleeve (1); And / or, the inner diameter of the convex ring (22) is larger than the inner diameter of the hollow ring (21); And / or, the inner diameter of the retaining ring (23) gradually decreases from the side connecting the hollow ring (21) to the opposite side.

8. A cooler inner sleeve assembly for a steel pipe spraying apparatus according to claim 6, characterized in that: The convex ring (22) has an assembly fastening hole.

9. A cooler inner sleeve assembly for a steel pipe spraying apparatus as defined in claim 1, wherein: The water baffle (2) is hinged to a positioning auxiliary mechanism (4) for assisting the steel pipe to be placed in the central axis position of the inner sleeve (1) of the cooler. The positioning auxiliary mechanism (4) includes at least two limiting plates (43) that can be overlapped and fitted in sequence. A limiting port (44) is opened on the lower side of the limiting plate (43), and the width of the limiting port (44) of the multiple limiting plates (43) decreases in sequence according to the fitting order. The limiting port (44) includes a semi-circular hole coaxial with the through port (26).

10. A cooler inner sleeve assembly for a steel pipe spraying apparatus according to claim 9, wherein: A fixed shaft (41) is installed on the outer end face of the water-blocking ring (2), and a rotating ring (42) that is fitted on the fixed shaft (41) and can stay at any rotation angle is fixedly connected to the limiting plate (43).

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