Water spraying assembly and quenching device

Abstract

The water spraying assembly comprises a water spraying ring, a water baffle is detachably installed on the feeding side of the water spraying ring, a plurality of spraying holes are evenly formed in the side wall of the water spraying ring in the circumferential direction of the water spraying ring, and the spraying holes are obliquely formed towards the discharging side of the water spraying ring, so that quenching liquid is sprayed and concentrated on the discharging side of the water spraying ring; the distance between the splashing position of quenching liquid and the feeding side of the water spraying ring is effectively prolonged, the auxiliary water return prevention effect is achieved, the water baffle comprises a connecting part, a water blocking part is fixedly arranged on one side of the connecting part and inserted into the water spraying ring, and the outer wall of the water blocking part is in close contact with the inner wall of the feeding side of the water spraying ring. The opening diameter of one end, away from the feeding side of the water spraying ring, of the water retaining part is smaller than that of the other end of the water retaining part, and quenching liquid splashed into the feeding side by the water spraying ring can be blocked and guided by the side wall of the water retaining part, so that the quenching liquid flows back to the surface of the workpiece again and flows in the conveying direction of the workpiece without reverse backflow. And the water return prevention effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of quenching devices, in particular to a water spray component and a quenching device. Background Art

[0002] The pins and bushings of engineering machinery tracks need to have good hardness and wear resistance, and their surfaces need to be quenched (generally by induction heat treatment) to obtain higher hardness. The existing pins and bushings induction quenching heat treatment devices mainly use horizontal inclined roller machines, where the rollers are placed at an angle, with the feed side high and the discharge side low. The workpieces are continuously transported end to end by the rotation of the rollers and the weight of the workpieces. The heated workpieces continuously pass through the water spray circle to be sprayed with quenching liquid at the water spray circle. However, the spray holes are perpendicular to the spray surface of the inner wall of the water spray circle, and a large number of water columns are concentrated in the center of the inner side of the water spray circle. The water spray circle is prone to water backflow, which seriously affects the quality of heat treatment.

[0003] At present, water spray rings that prevent backflow have appeared (such as publication number CN111485081B). The inner side of the circumferential surface of the water spray ring near the tail end is processed with a trumpet-shaped structure with an enlarged diameter, and the side position of the trumpet-shaped structure is processed with multiple water outlet holes. The water sprayed from the tail end of the water spray ring will be quenched from the outer periphery of the workpiece. The trumpet-shaped structure at the rear end of the water spray ring can prevent the cooling water from flowing back, so that the cooling water after the action flows along the workpiece transmission direction without reverse backflow.

[0004] Although the trumpet-shaped structure of the water spray ring improves the reflux of cooling water to a certain extent, it still cannot be avoided. The main reasons are as follows: the quenching cooling of workpieces such as pins and pin sleeves requires a large flow rate and pressure of quenching liquid. A large amount of quenching liquid is sprayed out from the water spray device (i.e., the water spray ring). In addition, the quenching liquid is reflected and splashed from the surface of the workpiece. The quenching liquid cannot be completely blocked by the inclined side wall alone, and the reverse reflux of the quenching liquid is bound to occur, and the anti-backflow effect is poor. Utility Model Content

[0005] In order to solve the technical problem that the existing water spray ring in the above background technology has a poor anti-backflow effect, the utility model provides a water spray component.

[0006] The technical solution of this utility model is as follows:

[0007] The utility model provides a water spray assembly, comprising: a water spray circle, a water baffle plate is detachably mounted on the feed side of the water spray circle, the water baffle plate and the water spray circle are both hollow structures, a plurality of spray holes are evenly arranged on the side wall of the water spray circle along its circumferential direction, the spray holes are tilted toward the discharge side of the water spray circle, so that the quenching liquid is sprayed and concentrated on the discharge side of the water spray circle, effectively extending the distance between the quenching liquid splashing position and the feed side of the water spray circle, playing an auxiliary role in preventing backflow, the water baffle plate comprises a connecting part, a water baffle plate is fixedly mounted on one side of the connecting part, the connecting part is detachably mounted on the feed side of the water spray circle, and the water baffle plate ... The water retaining part is inserted in the water spray circle, the outer wall of the water retaining part is in close contact with the inner wall of the feed side of the water spray circle, the opening diameter of one end of the water retaining part away from the feed side of the water spray circle is smaller than the opening diameter of the other end, so that the side wall of the water retaining part is inclined toward the axis of the discharge side of the water spray circle in the water spray circle. When the quenching liquid is sprayed, the quenching liquid splashing toward the feed side in the water spray circle will be blocked and guided by the side wall of the water retaining part, so that the quenching liquid flows back to the surface of the workpiece and flows along the conveying direction of the workpiece without reverse reflux, which further improves the effect of preventing backflow and ensures the quenching quality.

[0008] Preferably, the water retaining part and the connecting part are coaxially arranged, and the connecting part is a circular plate-shaped structure, and a plurality of bolt holes are arranged on the connecting part at intervals along the circumferential direction thereof to facilitate the connection between the water retaining plate and the water spray ring.

[0009] Preferably, the water spray ring is a straight cylinder structure.

[0010] Preferably, the water spray ring is a trumpet-shaped structure, which is convenient for processing the inclined spray holes.

[0011] Preferably, the opening diameter of the water spray ring on the feed side is smaller than the opening diameter of the water spray ring on the discharge side. On the one hand, this facilitates the processing of the spray hole. On the other hand, the inner wall of the water spray ring also serves to block the splashing quenching liquid, so as to further improve the overall anti-backflow capability of the water spray assembly and improve the quenching quality.

[0012] The utility model provides a water spray component, comprising: a frame, on which a feeding mechanism, a pressing mechanism, a roller assembly and a discharging mechanism are arranged in sequence according to the conveying direction of the workpiece; a heating component and a water spray component are arranged in sequence on the roller assembly according to the conveying direction of the workpiece; the arrangement of the water spray component can play a role in preventing water from returning, thereby ensuring the quenching quality of the workpiece.

[0013] Preferably, the roller assembly includes two rollers with parallel axes. The two rollers have the same rotation direction. A number of troughs are spaced apart on the wheel body of the roller. The heating assembly and the water spray assembly are both installed in the corresponding troughs. A large amount of quenching liquid sprayed from the discharge side of the water spray circle and a small amount of quenching liquid flowing out from the feed side of the water spray circle can flow directly from the trough to avoid the quenching liquid backflow affecting the heat treatment quality.

[0014] Preferably, the heating assembly includes two heating sensors, which are arranged in sequence along the workpiece conveying direction, and each heating sensor is correspondingly arranged in a sink, so that the workpiece has two-stage heating, ensuring that the workpiece quenching hardness and hardened layer depth meet the technical requirements.

[0015] Preferably, two water spray assemblies are provided, and the two water spray assemblies are arranged in sequence along the workpiece conveying direction, and each water spray assembly is correspondingly arranged in a sink, which prolongs the cooling time of the workpiece, allows the workpiece to be fully cooled, ensures the surface hardness and the depth of the hardened layer, and effectively avoids deformation and cracking.

[0016] It can be seen from the above technical solutions that the advantages of the utility model are:

[0017] 1. The spray holes on the water spray ring are tilted toward the discharge side, so that the quenching liquid is concentrated on the discharge side of the water spray ring, effectively extending the distance between the quenching liquid splashing position and the feed side of the water spray ring, playing an auxiliary role in preventing backflow. With the setting of the water baffle, the quenching liquid splashing from the water spray ring to the feed side will be blocked and guided by the water baffle, so that the quenching liquid flows back to the workpiece surface and flows along the workpiece conveying direction without reverse reflux, further improving the effect of preventing backflow and ensuring the quenching quality.

[0018] 2. The opening diameter of the feed side of the water spray ring is smaller than that of the discharge side. On the one hand, it facilitates the processing of the spray hole. On the other hand, the inner wall of the water spray ring also serves to block the splashing quenching liquid, so as to further improve the overall anti-backflow ability of the water spray assembly and improve the quenching quality.

[0019] 3. There are several troughs on the wheel body of the roller. The heating components and water spray components are installed in the corresponding troughs. A large amount of quenching liquid sprayed from the discharge side of the water spray circle and a small amount of quenching liquid flowing from the feed side of the water spray circle can flow directly from the trough to avoid the quenching liquid backflow affecting the heat treatment quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic cross-sectional structure diagram of a water spray assembly of a first structure according to one or more embodiments of the utility model;

[0022] Figure 2 It is a schematic cross-sectional structure diagram of a water spray assembly of a second structure according to one or more embodiments of the utility model;

[0023] Figure 3 It is a front view structural schematic diagram of a water spray assembly according to one or more embodiments of the utility model;

[0024] Figure 4 It is a three-dimensional structural schematic diagram of a water spray ring in a second structural water spray assembly according to one or more embodiments of the utility model;

[0025] Figure 5 It is a front view structural schematic diagram of a water retaining plate according to one or more embodiments of the utility model;

[0026] Figure 6 A schematic cross-sectional structure diagram of a water retaining plate according to one or more embodiments of the present invention;

[0027] Figure 7 It is a schematic diagram of the overall structure of a quenching device according to one or more embodiments of the present invention;

[0028] Figure 8 A schematic diagram of the positional relationship between the roller assembly, the heating assembly, and the water spray assembly according to one or more embodiments of the present invention;

[0029] The components represented by the reference numerals in the figure are:

[0030] 1. Water spray ring; 2. Water baffle; 21. Connecting part; 22. Water baffle; 3. Spray hole; 4. Flange; 5. Feeding mechanism; 6. Roller; 61. Sink; 7. Heating sensor; 8. Water spray assembly; 9. Pressing mechanism.

[0031] Glossary:

[0032] Backflow: refers to the quenching liquid spraying, splashing or overflowing from the feed side of the water spray circle, causing the heated workpiece to cool down prematurely before entering the water spray circle, resulting in soft or uneven hardness, affecting the quality of heat treatment. DETAILED DESCRIPTION

[0033] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0034] Example 1

[0035] In a typical implementation of the present invention, Figure 1-Figure 6As shown, a water spray assembly is proposed, comprising: a water spray ring 1 and a water baffle 2, the water spray ring 1 and the water baffle 2 are both hollow structures and are coaxially arranged, and the water baffle 2 can be detachably installed on the feed side of the water spray ring 1 by bolt connection (such as Figure 3 As shown), the quenching liquid (also understood as coolant) is blocked by the water baffle 2 to prevent the quenching liquid from spraying, splashing or overflowing from the feed side, thereby preventing water from flowing back and preventing the heated workpiece from being cooled down in advance before entering the water spray circle 1, thereby preventing the hardness from being soft or uneven, and ensuring the quality of heat treatment.

[0036] Specifically, a plurality of spray holes 3 are evenly arranged on the side wall of the water spray circle 1 along its circumferential direction, and the spray holes 3 are inclined toward the discharge side of the water spray circle 1, so that there is a set angle between the axis of the spray holes 3 and the axis of the water spray circle 1, so that the quenching liquid is sprayed and concentrated on the discharge side of the water spray circle 1, effectively extending the distance between the quenching liquid splashing position and the feed side of the water spray circle 1, playing a role in assisting in preventing backflow.

[0037] like Figure 5-Figure 6 As shown, the water retaining plate 2 includes a connecting portion 21 and a water retaining portion 22. The water retaining portion 22 is fixedly arranged on one side of the connecting portion 21. The water retaining portion 22 is coaxially arranged with the connecting portion 21. The connecting portion 21 is a circular plate-like structure. A plurality of bolt holes are arranged on the connecting portion 21 along the circumferential direction thereof. The connecting portion 21 can be detachably installed on the feed side of the water spraying ring 1 by bolt connection. Specifically, a flange 4 is installed on the outer wall of the water spraying ring 1. The water spraying ring 1 is connected to the connecting portion 21 of the water retaining plate 2 and the water pipe through the flange 4.

[0038] The water retaining portion 22 is inserted into the water spraying circle 1 from the feed side of the water spraying circle 1, and the outer wall of the water retaining portion 22 is in close contact with the inner wall of the feed side of the water spraying circle 1. The water retaining portion 22 is a trumpet-shaped structure, that is, the diameter of the opening at one end of the water retaining portion 22 is smaller than the diameter of the opening at the other end. Specifically, the opening diameter of the discharge end (the end away from the feed side of the water spraying circle 1) of the water retaining portion 22 is smaller than the opening diameter of the feed end, and the opening diameter of the discharge end of the water retaining portion 22 is the same as the diameter of the workpiece (specifically the diameter of the pin shaft and the outer diameter of the sleeve). Since the water retaining portion 22 is a trumpet-shaped structure, its side wall is inclined toward the axis of the discharge side of the water spraying circle 1 in the water spraying circle 1. When the quenching liquid is sprayed, the quenching liquid splashing toward the feed side in the water spraying circle 1 will be blocked and guided by the side wall of the water retaining portion 22, so that the quenching liquid flows back to the surface of the workpiece and flows along the workpiece conveying direction without reverse reflux, further improving the effect of preventing backflow and ensuring the quenching quality.

[0039] like Figure 1As shown, in this embodiment, the water spray circle 1 is a straight cylinder structure, that is, the opening diameters on both sides of the water spray circle 1 (the feed side and the discharge side) are the same, the spray holes 3 are evenly arranged on the side wall of the water spray circle 1, the spray holes 3 penetrate the side wall of the water spray circle 1, and the spray holes 3 are inclined toward the discharge side of the water spray circle 1.

[0040] like Figure 2 , Figure 4 As shown, in order to reduce the difficulty of processing the spray hole 3, in other embodiments, the water spray circle 1 can also be set to a trumpet-shaped structure, so that the side wall of the water spray circle 1 is inclined, that is, the opening diameters of the feed side and the discharge side of the water spray circle 1 are different, so as to facilitate the processing of the spray hole 3. Specifically, the opening diameter of the feed side of the water spray circle 1 is smaller than the opening diameter of the discharge side, and the spray hole 3 is inclined toward the discharge side. On the one hand, the distance between the splashing position of the quenching liquid and the feed side of the water spray circle 1 is extended. On the other hand, the inner wall of the water spray circle 1 also serves to block the splashing quenching liquid, so as to further improve the overall anti-backflow ability of the water spray assembly and improve the quenching quality.

[0041] Example 2

[0042] In a typical implementation of the present invention, Figure 7-Figure 8 As shown, a quenching device is proposed, which adopts the water spray assembly described in Example 1, including: a frame, on which a feeding mechanism 5, a roller assembly, a heating assembly, a water spray assembly 8, a pressing mechanism 9 and a discharging mechanism 10 are installed. According to the conveying direction of the workpiece, the feeding mechanism 5, the pressing mechanism 9, the roller assembly and the discharging mechanism 10 are arranged in sequence, and the heating assembly and the water spray assembly 8 are both arranged at the position of the roller assembly, and according to the conveying direction of the workpiece, the heating assembly and the water spray assembly 8 are arranged in sequence.

[0043] It should be noted that the structures of the feeding mechanism 5, the roller assembly, the pressing mechanism 9 and the discharging mechanism 10 are the same as those of the corresponding mechanisms in the prior art (publication number CN114231712A), and the specific structures will not be described in detail here.

[0044] Among them, the roller assembly includes two rollers 6 with parallel axes. The rollers 6 are arranged obliquely downward according to the conveying direction of the workpiece. The two rollers 6 rotate in the same direction and rotate around the axis synchronously. The workpiece is located between the two rollers 6. The workpiece can not only be conveyed along the conveying direction, but also rotate around the axis to ensure uniform heating.

[0045] A number of troughs 61 are provided at intervals on the wheel body of the roller 6, and the heating assembly and the water spray assembly 8 are both installed in the corresponding troughs 61. The troughs 61 play an auxiliary role in preventing backflow. Specifically, a large amount of quenching liquid sprayed from the discharge side of the water spray circle 1 and a small amount of quenching liquid flowing out from the feed side of the water spray circle 1 can directly flow away from the trough 61, thereby preventing the backflow of the quenching liquid from affecting the quality of heat treatment.

[0046] The heating assembly includes two heating sensors 7, which are arranged in sequence along the workpiece conveying direction, and each heating sensor 7 is correspondingly arranged in a sink 61. The heating sensor 7 is an existing induction heating structure (such as publication number CN208964980U), and the specific structure is not restricted too much here.

[0047] Since the two heating sensors 7 are arranged in sequence, the workpiece has two stages of heating. In the first stage of heating, the heating sensor 7 preheats the workpiece to 500-700 degrees Celsius. In the second stage of heating, the heating sensor 7 further heats the workpiece to fully transform the austenite, ensuring that the quenching hardness and hardened layer depth of the workpiece meet the technical requirements.

[0048] There are two water spray assemblies 8, which are arranged in sequence along the workpiece conveying direction, and each water spray assembly 8 is correspondingly arranged in a sink 61. Since the workpieces are continuously conveyed end to end for quenching heat treatment, the operation speed is relatively fast. When only one water spray assembly 8 is set, the workpiece cooling time is extremely short, the cooling is insufficient, the martensite transformation is insufficient, the quenching surface hardness is low, and the hardened layer is shallow. If you want to cool it in place at one time, you need a larger spray flow rate, pressure and supercooling, and the workpiece is very easy to deform or crack; therefore, this embodiment is divided into two water spray cooling, the front water spray assembly 8 performs the first step of cooling, and the other water spray assembly 8 installed at the rear is used to further perform large-flow spray cooling on the workpiece, which prolongs the cooling time of the workpiece, makes the workpiece cool fully, ensures the surface hardness and the depth of the hardened layer, and effectively avoids deformation and cracking.

[0049] The water spray circle 1 is connected to a water pipe through a flange. A plurality of water pipes are provided and are evenly arranged along the circumference of the water spray circle 1 .

[0050] The specific working principle is:

[0051] The workpiece is loaded and conveyed to the roller assembly. The two rollers 6 rotate in the same direction, thereby driving the workpiece between the two rollers 6 to rotate around the axis. The workpiece is heated at the heating sensor 7. In the first stage of heating, the heating sensor 7 located in the front preheats the workpiece to 500-700 degrees Celsius. In the second stage of heating, the heating sensor 7 at the rear further heats the workpiece to fully transform the austenite, ensuring that the quenching hardness and hardened layer depth of the workpiece meet the technical requirements.

[0052] After the heating is completed, the workpiece moves to the water spray assembly 8 under the rotation of the roller 6 and the action of gravity, and is sprayed with water twice for cooling. The front water spray assembly 8 performs the first step of cooling, and the other water spray assembly 8 installed at the rear further performs large-flow spray cooling on the workpiece, which prolongs the cooling time of the workpiece, makes the workpiece fully cooled, ensures the surface hardness and the depth of the hardened layer, and effectively avoids deformation and cracking;

[0053] The workpiece after quenching is transported outward through the discharging mechanism 10 .

[0054] Among them, since the spray hole 3 on the water spray circle 1 in the water spray assembly 8 is inclined toward the discharge side, and a water baffle 2 is provided on the feed side of the water spray circle 1, it can effectively prevent the quenching liquid from spraying outward from the feed side, splashing or overflowing in large quantities, and play a role in preventing backflow. At the same time, the setting of the trough 61 can make a large amount of quenching liquid sprayed from the discharge side of the water spray circle 1, and a small amount of quenching liquid flowing out from the feed side of the water spray circle 1, flow directly from the trough 61, thereby avoiding the backflow of quenching liquid affecting the quality of heat treatment.

[0055] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A water spray assembly, comprising: A water spray ring (1) is characterized in that a water baffle (2) is detachably mounted on the feed side of the water spray ring (1), the water baffle (2) and the water spray ring (1) are both hollow structures, a plurality of spray holes (3) are evenly arranged on the side wall of the water spray ring (1) along its circumferential direction, the spray holes (3) are inclinedly arranged toward the discharge side of the water spray ring (1), the water baffle (2) comprises a connecting portion (21), a water baffle (22) is fixedly arranged on one side of the connecting portion (21), the connecting portion (21) is detachably mounted on the feed side of the water spray ring (1), the water baffle (22) is inserted into the inside of the water spray ring (1), the outer wall of the water baffle (22) is in close contact with the inner wall of the feed side of the water spray ring (1), and the opening diameter of one end of the water baffle (22) away from the feed side of the water spray ring (1) is smaller than the opening diameter of the other end thereof.

2. A water spray assembly according to claim 1, characterized in that: The water retaining portion (22) is coaxially arranged with the connecting portion (21); the connecting portion (21) is a circular ring plate structure; and a plurality of bolt holes are arranged at intervals along the circumferential direction of the connecting portion (21).

3. A water spray assembly according to claim 1, characterized in that: The water spray ring (1) is a straight cylinder structure.

4. A water spray assembly according to claim 1, characterized in that: The water spray ring (1) is a trumpet-shaped structure.

5. A water spray assembly according to claim 4, characterized in that: The opening diameter of the water spray ring (1) on the feeding side is smaller than the opening diameter on the discharging side.

6. A quenching device, characterized in that: A water spray assembly as claimed in any one of claims 1 to 5 is used, comprising: a frame, on which a loading mechanism (5), a pressing mechanism (9), a roller (6) assembly and a discharging mechanism (10) are arranged in sequence according to the conveying direction of the workpiece, and a heating assembly and a water spray assembly (8) are arranged in sequence on the roller (6) assembly according to the conveying direction of the workpiece.

7. A quenching device according to claim 6, characterized in that: The roller (6) assembly comprises two rollers (6) with parallel axes. The two rollers (6) have the same rotation direction. A plurality of sink grooves (61) are arranged at intervals on the wheel body of the roller (6). The heating assembly and the water spray assembly (8) are both installed in the corresponding sink grooves (61).

8. A quenching device according to claim 7, characterized in that: The heating assembly comprises two heating sensors (7), the two heating sensors (7) are arranged in sequence along the workpiece conveying direction, and each heating sensor (7) is correspondingly arranged in a sink (61).

9. A quenching device according to claim 7, characterized in that: Two water spray assemblies (8) are provided, and the two water spray assemblies (8) are arranged in sequence along the workpiece conveying direction, and each water spray assembly (8) is correspondingly arranged in a sink (61).

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