Stainless steel coloring device

Abstract

The invention relates to the technical field of stainless steel processing, in particular to a stainless steel coloring device. Comprising a coloring pool; the first mounting seat is fixedly connected in the coloring pool; the conveying roller is rotationally connected to the first mounting seat; the first motor is fixedly connected to the outer wall of the coloring pool; the second mounting seat is connected into the coloring pool in a sliding manner in the horizontal direction; the adjusting roller is rotationally connected to the second mounting seat; the threaded rod is rotationally connected into the coloring pool wall; the detector is fixedly connected to the wall surface of the coloring pool; the second motor is fixedly connected in the coloring pool wall and is electrically connected with the detector; and the transmission assembly is arranged between the second motor and each threaded rod. According to the invention, the effective reaction stroke of the stainless steel band in the coloring pool is automatically adjusted by detecting the concentration change of the chemical solution, so that the reduction of the coloring ability caused by the consumption of chemical solution components is compensated on the premise that the conveying speed is not reduced and the overall processing efficiency is not influenced.

Description

Technical Field

[0001] This invention relates to the field of stainless steel processing technology, and in particular to a stainless steel coloring device. Background Technology

[0002] Stainless steel is widely used in many fields due to its excellent comprehensive properties. To meet diverse appearance and functional requirements, its surface often needs to be colored. Among these methods, chemical film formation has become one of the mainstream technologies due to its simple process and low cost.

[0003] This method typically involves immersing stainless steel in a specific chemical solution, where a colored film forms on the surface through a chemical reaction between the solution and the substrate. However, in actual continuous production, the effective components in the solution are continuously consumed, and their concentration gradually decreases, leading to a slower film-forming rate and consequently reduced uniformity and color consistency of the resulting film. To maintain coloring quality, existing processes mainly employ two approaches: one is to periodically replace the treatment solution, but this results in low solution utilization and increased production costs; the other is to extend the immersion time of the stainless steel in the solution to compensate for insufficient reaction kinetics, but this significantly reduces processing efficiency and is difficult to adapt to mass production pace. Summary of the Invention

[0004] This invention provides a stainless steel coloring device that can achieve stable film formation while improving the utilization rate of chemical solutions and overall production efficiency, aiming to solve the defects of the prior art mentioned in the background.

[0005] A stainless steel coloring device includes: a coloring tank; a first mounting base fixedly connected to the coloring tank; a conveying roller for conveying stainless steel strip rotatably connected to the first mounting base; a first motor fixedly connected to the outer wall of the coloring tank for driving the conveying roller to rotate; the device further includes: a second mounting base slidably connected to the coloring tank in a horizontal direction; an adjusting roller rotatably connected to the second mounting base; threaded rods rotatably connected to the wall of the coloring tank, forming a threaded engagement with the second mounting base; a detector fixedly connected to the wall of the coloring tank for real-time monitoring of the concentration of a chemical solution; a second motor fixedly connected to the wall of the coloring tank, electrically connected to the detector, and controlling its operation according to the concentration change detected by the detector; and a transmission assembly disposed between the second motor and each threaded rod.

[0006] Optionally, the coloring tank has a drain outlet at the bottom for discharging chemical waste liquid after the reaction; the device further includes: a collection tank located below the coloring tank that can be freely placed and removed for receiving chemical waste liquid; a mounting frame fixedly connected to the coloring tank; a plug slidably connected to the mounting frame for sealing the drain outlet; a first return spring fixedly connected between the mounting frame and the plug for keeping the plug in a sealed state; at least two sets of limiting frames slidably connected to the mounting frame for locking the position of the plug and releasing the locking control by displacement; a second return spring fixedly connected between the mounting frame and each limiting frame for giving the limiting frames a reset capability; a connecting arm fixedly connected to one set of limiting frames; a control head fixedly connected to the second mounting base, having an inclined contact surface for contacting and engaging with the connecting arm; a synchronous disc rotatably connected to the top of the mounting frame; and synchronous arms rotatably connected between the synchronous disc and each limiting frame for controlling the synchronous displacement of each set of limiting frames.

[0007] Optionally, the device further includes a rubber ring with deformable characteristics that is fixedly connected to the bottom of the plug.

[0008] Optionally, the edge of the collection pool opening is provided with a raised edge; the device further includes: a pusher that is slidably connected vertically to the bottom of the coloring pool for supporting the collection pool; a third return spring fixedly connected between the pusher and the coloring pool for resetting the position of the pusher; and a control arm fixedly connected to the pusher, the end of which passes through the plug, the size of which is larger than the through-channel provided on the plug, so as to pull the plug downward.

[0009] Optionally, the device further includes: a mounting box fixedly connected to the bottom of the coloring pool; a limiting frame slidably connected to the mounting box in a horizontal direction to support the pusher; and a fourth return spring fixedly connected between the limiting frame and the mounting box for controlling the timing of the pusher's downward movement via the limiting frame.

[0010] Optionally, the device further includes: a storage tank fixedly connected to the top of the coloring tank for storing a new batch of chemical solution, with an outlet at the bottom; an inlet for adding chemical solution at the top of the storage tank, with a tank plug sealing the inlet; a mounting block fixedly connected to the bottom of the storage tank; a switching shaft rotatably connected to the mounting block, located at the outlet, and having a through-hole, wherein the chemical solution can only be added to the coloring tank when the through-hole is aligned with the outlet; and a reset torsion spring sleeved on the rotating shaft of the switching shaft, one end fixed to the switching shaft and the other end fixed to the mounting block, for providing a reset torque to the switching shaft to misalign the through-hole with the outlet.

[0011] Optionally, the device further includes a connecting rod rotatably connected between the switching shaft and the control arm for transmitting power.

[0012] Optionally, the device further includes: a mounting plate fixedly connected to the second mounting base; an impeller rotatably connected to the mounting plate; a bevel gear set consisting of two meshing bevel gears, respectively fixed to the rotating shaft of the adjusting roller and the rotating shaft of the impeller, wherein the two bevel gears have different numbers of teeth, with the one with fewer teeth located on the impeller; the mounting plate, the impeller, and the bevel gear set together constitute a flow-promoting component, and a flow-promoting component is symmetrically arranged on both sides of the adjusting roller and on both sides of the conveying roller, wherein the mounting plate corresponding to the conveying roller is fixed to the first mounting base, and the bevel gear in the corresponding bevel gear set is fixed to the rotating shaft of the conveying roller.

[0013] The beneficial effects of this invention are as follows: By detecting changes in the concentration of the chemical solution, this invention automatically adjusts the effective reaction stroke of the stainless steel strip in the coloring bath, thereby compensating for the decrease in coloring ability caused by the consumption of chemical solution components without reducing the conveying speed or affecting the overall processing efficiency. This design effectively solves the contradictions in existing technologies, such as low utilization rate due to frequent replacement of chemical solutions caused by concentration decreases, or the impact of prolonged soaking time on production efficiency. While ensuring the stability of coloring quality, it significantly improves the utilization efficiency of the chemical solution, providing a more reliable guarantee for continuous stainless steel coloring production. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the overall structure of the present invention from a rear-side perspective.

[0016] Figure 3 This is a cross-sectional view of the internal structure of the present invention.

[0017] Figure 4 This is a schematic diagram showing the positional structure of the adjusting roller, detector, and second motor in this invention.

[0018] Figure 5 This is a schematic diagram of the connection structure of the adjusting roller, threaded rod, and detector in this invention.

[0019] Figure 6 This is a schematic diagram of the connection structure of the plug in this invention.

[0020] Figure 7 This is a schematic diagram of the structure of the plug when the control head and the connecting arm are engaged in the present invention.

[0021] Figure 8 This is a schematic diagram showing the position and structure of the collection pool and the pusher in this invention.

[0022] Figure 9 This is a schematic diagram of the connection structure between the pusher and the limiting frame in this invention.

[0023] Figure 10 This is a schematic diagram of the connection structure between the storage pool and the switching shaft in this invention.

[0024] Figure 11 This is a cross-sectional view of the structure when the inlet and outlet are aligned in this invention.

[0025] Figure 12 This is a schematic diagram of the connection structure of the push frame, switching shaft and connecting arm in this invention.

[0026] Figure 13 This is a schematic diagram of the impeller connection structure in this invention.

[0027] In the attached diagram, the markings are as follows: 001: Stainless steel strip; 101: Coloring tank; 1011: Drain outlet; 102: Feed roller; 1021: First mounting base; 103: First motor; 104: Flat gear set; 105: Guide roller; 106: Adjusting roller; 1061: Second mounting base; 107: Collection tank; 1071: Protruding edge; 201: Threaded rod; 202: Detector; 203: Second motor; 204: Transmission assembly; 2041: Transmission wheel; 2042: Transmission belt; 301: Mounting bracket; 302: Plug; 303: Rubber ring; 304: First reset. Spring, 305: Limiting bracket, 306: Second return spring, 307: Connecting arm, 308: Control head, 309: Synchronizing disc, 310: Synchronizing arm, 401: Push bracket, 402: Third return spring, 403: Control arm, 404: Mounting box, 405: Limiting bracket, 406: Fourth return spring, 501: Storage pool, 5011: Liquid outlet, 502: Pool plug, 503: Mounting block, 504: Switching shaft, 5041: Through port, 505: Return torsion spring, 506: Connecting rod, 601: Mounting plate, 602: Impeller, 603: Bevel gear set. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0029] Example: A stainless steel coloring device, such as Figures 1-5As shown, the system includes: a coloring tank 101, in which a stainless steel strip 001 undergoes a coloring reaction through a chemical solution; a first mounting base 1021 fixedly installed within the coloring tank 101; two sets of conveying rollers 102 rotatably mounted on the first mounting base 1021, arranged parallel and perpendicularly side-by-side for conveying the stainless steel strip 001; a first motor 103 fixedly mounted on the outer wall of the coloring tank 101, its output end coaxially fixed with one set of conveying rollers 102 for providing rotational power to the conveying rollers 102; a set of spur gears 104 located on the outer wall of the coloring tank 101, consisting of two meshing spur gears, which are coaxially fixed with the two sets of conveying rollers 102 respectively, achieving opposite rotation between them to ensure stable feeding; a guide roller 105 rotatably installed within the coloring tank 101 for adjusting the running direction of the stainless steel strip 001; and a second mounting base 1021 slidably mounted horizontally within the coloring tank 101. Mounting base 1061; rotatably mounted adjustment roller 106 on the second mounting base 1061, which maintains the same horizontal height as the lowest-positioned feeding roller 102; rotatably mounted two sets of threaded rods 201 inside the wall of the coloring pool 101, which form a threaded engagement with the second mounting base 1061, and control the horizontal displacement of the adjustment roller 106 by forward and reverse rotation; detector 202 fixedly mounted on the wall of the coloring pool 101, used to monitor the concentration of the chemical solution in real time; second motor 203 fixedly mounted inside the wall of the coloring pool 101, which is electrically connected to the detector 202, and controls its operation according to the concentration change detected by the detector 202; transmission assembly 204 provided between the second motor 203 and each threaded rod 201, each set of transmission assembly 204 including two transmission wheels 2041 and a transmission belt 2042 wound between them, the two transmission wheels 2041 being fixed to the output end of the second motor 203 and the shaft of the corresponding threaded rod 201 respectively.

[0030] During operation, the first motor 103 drives two sets of conveying rollers 102 to rotate in opposite directions, stably conveying the stainless steel strip 001 into the coloring tank 101 for coloring. As the reaction proceeds, the solution concentration decreases, and the detector 202 drives the second motor 203 to operate, which in turn drives the threaded rod 201 to rotate through the transmission assembly 204, causing the adjusting roller 106 to move accordingly, thereby increasing the immersion length of the stainless steel strip 001 in the tank. That is, by extending the effective reaction stroke, the insufficient coloring caused by the decrease in concentration is compensated, while the overall conveying speed remains unchanged, so the processing efficiency is not affected. When the solution concentration is too low, it can be replaced with new solution, at which point the adjusting roller 106 returns to its initial position.

[0031] This device automatically adjusts the effective reaction stroke of the stainless steel strip 001 in the coloring tank 101 by detecting changes in the concentration of the chemical solution. This compensates for the decrease in coloring capacity caused by the consumption of chemical solution components without reducing the conveying speed or affecting overall processing efficiency. This design effectively solves the contradictions in existing technologies where frequent chemical solution replacements due to concentration drops lead to low utilization rates, or prolonged soaking times affect production efficiency. While ensuring stable coloring quality, it significantly improves the utilization efficiency of the chemical solution, providing a more reliable guarantee for continuous stainless steel coloring production.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, the coloring tank 101 has a drain outlet 1011 at the bottom for discharging chemical waste liquid after the reaction. The device also includes: a collection tank 107 located below the coloring tank 101 and freely accessible, directly below the drain outlet 1011, for receiving the chemical waste liquid; a mounting frame 301 fixedly installed inside the coloring tank 101, located directly above the drain outlet 1011; a plug 302 slidably installed on the mounting frame 301 for sealing the drain outlet 1011; a deformable rubber ring 303 fixedly installed at the bottom of the plug 302 to enhance the sealing effect of the plug 302; a first return spring 304 fixedly installed between the mounting frame 301 and the plug 302 to keep the plug 302 in a sealed state, which is a tension spring; and two sets of... Limiting brackets 305, located on both sides of the plug 302, are used to lock the position of the plug 302 and release the locking control by displacement; a second return spring 306, fixedly installed between the mounting bracket 301 and each limiting bracket 305, is sleeved on the sliding shaft of the limiting bracket 305, giving the limiting bracket 305 a return capability, and is a compression spring; a connecting arm 307 is fixedly installed on one of the limiting brackets 305; a control head 308 is fixedly installed on the second mounting base 1061, and has an inclined contact surface for contacting and cooperating with the connecting arm 307; a synchronous disc 309 is rotatably installed on the top of the mounting bracket 301; and synchronous arms 310, respectively rotatably installed between the synchronous disc 309 and each limiting bracket 305, are used to realize the synchronous reverse movement of the two sets of limiting brackets 305.

[0033] When the adjusting roller 106 moves to the end of its stroke, it indicates that the chemical solution is no longer available. At this time, the second mounting base 1061 drives the control head 308 to push the connecting arm 307, causing the limiting frame 305 connected to the connecting arm 307 to displace. The limiting frame 305 then rotates the synchronous disk 309 through the synchronous arm 310 it is connected to, thereby transmitting the other limiting frame 305 to move synchronously but in the opposite direction, and the second return spring 306 is compressed. At this time, the two limiting frames 305 will move away from the top of the plug 302, and the first return spring 304 will... The deformation is then restored, causing the plug 302 to move upward and directly open the drain port 1011, allowing the waste liquid to be discharged into the collection tank 107. After the drainage is completed, the drain port 1011 is resealed by moving the plug 302 downward, and the first reset spring 304 is stretched. Then, a new batch of chemical solution is added, and the detector 202 feeds back to the second motor 203, controlling the threaded rod 201 to reverse, causing the control head 308 to disengage from the connecting arm 307. The second reset spring 306 resets the limit bracket 305 to lock the plug 302 to prevent leakage.

[0034] like Figure 1 , Figure 3 , Figure 8 and Figure 9 As shown, the collection pool 107 has a raised edge 1071 around its opening. The device also includes: a pusher 401 slidably mounted vertically below the coloring pool 101, located below the raised edge 1071 of the collection pool 107, for supporting the collection pool 107; a third return spring 402 fixedly mounted between the pusher 401 and the coloring pool 101, sleeved on the sliding shaft of the pusher 401, for resetting the position of the pusher 401, and is a compression spring; and a control arm 403 fixedly mounted on the pusher 401, its end passing through a plug 302. The end dimension is larger than the through channel provided on the plug 302, so as to pull the plug 302 downward; the mounting box 404 is fixedly installed below the coloring pool 101 and is located on the side of the pushers 401 on both sides; the limiting frame 405 is slidably installed on the mounting box 404 in the horizontal direction and can support the pusher 401; the fourth return spring 406 is fixedly installed between the limiting frame 405 and the mounting box 404, and is sleeved on the sliding shaft of the limiting frame 405. It is used to control the timing of the pusher 401 moving downward through the limiting frame 405, and is a compression spring.

[0035] When the chemical waste liquid discharged into the collection tank 107 reaches a certain weight, specifically the weight of a batch of chemical solutions used, the pusher 401 can then push the limiting frame 405 to overcome the fourth return spring 406 and move completely away from below the pusher 401 and against the side of the pusher 401. The pusher 401 then moves rapidly downwards, compressing the third return spring 402. The pusher 401 then pulls the plug 302 downwards via the control arm 403, automatically sealing the drain port 1011. That is, after the chemical waste liquid is discharged... The plug 302 automatically closes the drain port 1011, allowing the operator to directly add a new batch of chemical solution. Subsequently, the limit frame 305 automatically locks the plug 302. After the chemical waste liquid is removed from the collection tank 107, the third reset spring 402 resets the push frame 401 upwards. At this time, the plug 302 is locked, and the control arm 403 slides relative to the plug 302. While the push frame 401 moves upwards to reset, the fourth reset spring 406 resets the limit frame 405, causing it to return to the bottom of the push frame 401. Finally, it is placed back into the collection tank 107.

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 10 , Figure 11 and Figure 12 As shown, the device further includes: a storage tank 501 fixedly installed on the top of the coloring tank 101 for storing a new batch of chemical solution, with an outlet 5011 at its bottom through which the chemical solution is added to the coloring tank 101; an inlet for adding chemical solution at the top of the storage tank 501, with a tank plug 502 sealing the inlet; mounting blocks 503 fixedly installed at the bottom of the storage tank 501, located on both sides of the outlet 5011; and a switching shaft 504 rotatably mounted on the mounting block 503. A through-hole 5041 is provided at the outlet 5011, and the chemical solution can only be added to the coloring tank 101 when the through-hole 5041 is aligned with the outlet 5011; a reset torsion spring 505 is sleeved on the rotating shaft of the switching shaft 504, with one end fixed to the switching shaft 504 and the other end fixed to the mounting block 503, and is used to provide reset torque for the switching shaft 504, so that the through-hole 5041 is misaligned with the outlet 5011; a connecting rod 506 is rotatably installed between the switching shaft 504 and the control arm 403 for transmitting power.

[0037] When the collection tank 107 moves downward, the control arm 403 pulls the plug 302 and simultaneously pulls the switching shaft 504 to rotate via the connecting rod 506. This allows the shaft to overcome the torsional force of the reset torsion spring 505 and rotate until its opening 5041 aligns with the liquid outlet 5011. Then, a new batch of chemical solution pre-loaded into the storage tank 501 can be added to the coloring tank 101, achieving automatic feeding. When the pusher 401 moves upward to reset, it will release the tension on the control arm 403, causing the reset torsion spring 505 to rotate the switching shaft 504 and automatically close the storage tank 501.

[0038] The overall process of this device is as follows:

[0039] During the coloring process, the operator first follows Figure 3 The stainless steel strip 001 is loaded into the device in the state shown, and its end is connected to the winding machine or subsequent processing equipment; a batch of chemical solution is injected into the coloring pool 101 and the storage pool 501 respectively; then the first motor 103 is started to drive the feeding roller 102 to rotate stably, and the stainless steel strip 001 is continuously driven into the coloring pool 101 to carry out the surface coloring reaction.

[0040] As the coloring process continues, the effective components of the chemical solution are continuously consumed, and the concentration gradually decreases. The detector 202 monitors the concentration changes in real time and controls the displacement of the adjusting roller 106 accordingly. By dynamically adjusting the immersion length of the stainless steel strip 001 in the pool, precise compensation for the coloring time per unit length of strip is achieved.

[0041] When the chemical solution becomes ineffective, the detector 202 controls the first motor 103 to stop operating. At the same time, the control head 308 pushes the connecting arm 307 to move, causing the limit frame 305 to disengage from the plug 302 and automatically opening the drain port 1011 to discharge the chemical waste liquid into the collection tank 107. Until the waste liquid is basically discharged, the collection tank 107 drives the pusher 401 to move down. The control arm 403 pulls the plug 302 to re-seal the drain port 1011 and drives the switching shaft 504 to rotate, so that the new solution in the storage tank 501 is automatically injected into the coloring tank 101. Finally, after the replenishment is completed, the detector 202 controls the adjusting roller 106 to reset, the limit frame 305 re-locks the plug 302, the first motor 103 restarts automatically, and the device resumes normal coloring operation.

[0042] Through the synergistic effect of the above structures, this device can realize the automatic discharge of chemical waste liquid and the automatic replenishment of fresh liquid, solving the problem of low solution utilization and difficulty in achieving both production efficiency in traditional processes. While ensuring stable coloring quality, it significantly improves the degree of production automation and operational flexibility.

[0043] like Figure 1 , Figure 2 , Figure 3 and Figure 13As shown, the device also includes: a mounting plate 601 fixedly mounted on the second mounting base 1061; an impeller 602 rotatably mounted on the mounting plate 601; and a bevel gear set 603 composed of two meshing bevel gears, which are respectively fixed on the rotating shaft of the adjusting roller 106 and the rotating shaft of the impeller 602. In particular, the two bevel gears have different numbers of teeth, and the one with fewer teeth is located on the impeller 602 to achieve speed-increasing transmission and increase the rotational speed of the impeller 602. The mounting plate 601, the impeller 602, and the bevel gear set 603 together constitute a flow-promoting component. In order to optimize the fluid uniformity, a flow-promoting component is symmetrically arranged on both sides of the adjusting roller 106 and on both sides of the conveying roller 102 at the same height. The mounting plate 601 corresponding to the conveying roller 102 is fixed on the first mounting base 1021, and the bevel gear in its bevel gear set 603 is fixed on the rotating shaft of the conveying roller 102.

[0044] During the coloring process, as the feeding roller 102 and the adjusting roller 106 rotate, the impeller 602 is driven to rotate faster through the bevel gear set 603, thereby achieving continuous stirring of the chemical solution. This design effectively promotes the flow of the solution in the tank and avoids uneven local concentration, thus ensuring the consistency and stability of the coloring of the stainless steel strip 001.

[0045] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. A stainless steel coloring device, comprising: Coloring pool (101); a first mounting base (1021) fixedly connected inside the coloring pool (101); a conveying roller (102) rotatably connected to the first mounting base (1021) for conveying stainless steel strip (001); a first motor (103) fixedly connected to the outer wall of the coloring pool (101) for driving the conveying roller (102) to rotate; characterized in that: the device further includes: a second mounting base (1061) slidably connected in the horizontal direction inside the coloring pool (101); an adjusting roller (1021) rotatably connected to the second mounting base (1061) 06); Rotary threaded rod (201) connected to the wall of coloring pool (101), which forms a threaded engagement with the second mounting base (1061); Detector (202) fixedly connected to the wall of coloring pool (101), used to monitor the concentration of chemical solution in real time; Second motor (203) fixedly connected to the wall of coloring pool (101), which is electrically connected to detector (202), and controls its operation according to the concentration change detected by detector (202); Transmission assembly (204) provided between second motor (203) and each threaded rod (201).

2. The stainless steel coloring device according to claim 1, characterized in that: The coloring tank (101) has a drain port (1011) at the bottom for discharging chemical waste liquid after the reaction. The device also includes: a collection tank (107) located below the coloring tank (101) and freely accessible for receiving chemical waste liquid; a mounting frame (301) fixedly connected inside the coloring tank (101); a plug (302) slidably connected to the mounting frame (301) for sealing the drain port (1011); a first return spring (304) fixedly connected between the mounting frame (301) and the plug (302) for keeping the plug (302) in a sealed state; and at least two sets of limiting frames (305) slidably connected to the mounting frame (301) for locking the position of the plug (302). The locking control is released by displacement; a second return spring (306) is fixedly connected between the mounting bracket (301) and each limit bracket (305) to enable the limit bracket (305) to reset; a connecting arm (307) is fixedly connected to one of the limit brackets (305); a control head (308) is fixedly connected to the second mounting base (1061) and has an inclined contact surface for contacting and cooperating with the connecting arm (307); a synchronous disc (309) is rotatably connected to the top of the mounting bracket (301); and synchronous arms (310) are rotatably connected between the synchronous disc (309) and each limit bracket (305) to control the synchronous displacement of each set of limit brackets (305).

3. The stainless steel coloring device according to claim 2, characterized in that: The device further includes: a rubber ring (303) with deformable characteristics that is fixedly connected to the bottom of the plug (302).

4. The stainless steel coloring device according to claim 2, characterized in that: The collection pool (107) has a raised edge (1071) around its opening edge; the device also includes: a pusher (401) slidably connected vertically to the bottom of the coloring pool (101) for supporting the collection pool (107); a third return spring (402) fixedly connected between the pusher (401) and the coloring pool (101) for resetting the position of the pusher (401); and a control arm (403) fixedly connected to the pusher (401), the end of which passes through the plug (302), the size of which is larger than the through channel provided on the plug (302) to pull the plug (302) downward.

5. A stainless steel coloring device according to claim 4, characterized in that: The device further includes: a mounting box (404) fixedly connected to the bottom of the coloring pool (101); a limiting frame (405) slidably connected to the mounting box (404) in the horizontal direction, capable of supporting the pusher (401); and a fourth return spring (406) fixedly connected between the limiting frame (405) and the mounting box (404), used to control the timing of the pusher (401) moving down through the limiting frame (405).

6. The stainless steel coloring device according to claim 5, characterized in that: The device further includes: a storage tank (501) fixedly connected to the top of the coloring tank (101) for storing a new batch of chemical solution, with an outlet (5011) at the bottom; an inlet for adding chemical solution at the top of the storage tank (501), with a tank plug (502) sealing the inlet; a mounting block (503) fixedly connected to the bottom of the storage tank (501); and a switching shaft (504) rotatably connected to the mounting block (503), located at the outlet. At position (5011), there is a through-hole (5041). The chemical solution can only be added to the coloring pool (101) when the through-hole (5041) is aligned with the liquid outlet (5011). The reset torsion spring (505) sleeved on the rotating shaft of the switching shaft (504) has one end fixed to the switching shaft (504) and the other end fixed to the mounting block (503). It is used to provide reset torque for the switching shaft (504) so ​​that the through-hole (5041) and the liquid outlet (5011) are misaligned.

7. A stainless steel coloring device according to claim 6, characterized in that: The device further includes a connecting rod (506) rotatably connected between the switching shaft (504) and the control arm (403) for transmitting power.

8. The stainless steel coloring device according to claim 1, characterized in that: The device further includes: a mounting plate (601) fixedly connected to the second mounting base (1061); an impeller (602) rotatably connected to the mounting plate (601); and a bevel gear set (603) consisting of two meshing bevel gears, respectively fixed to the shaft of the adjusting roller (106) and the shaft of the impeller (602). The two bevel gears have different numbers of teeth, with the one with fewer teeth located on the impeller (602). The mounting plate (601), the impeller (602), and the bevel gear set (603) together constitute a flow-promoting component. A flow-promoting component is symmetrically arranged on both sides of the adjusting roller (106) and on both sides of the conveying roller (102). The mounting plate (601) corresponding to the conveying roller (102) is fixed to the first mounting base (1021), and the bevel gear in its corresponding bevel gear set (603) is fixed to the shaft of the conveying roller (102).

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