Corrosion-resistant treatment device for QPQ piston rod and operation method of corrosion-resistant treatment device

Abstract

The invention relates to the technical field of piston rod treatment, and discloses a QPQ piston rod corrosion-resistant treatment device which comprises a frame body, a nitriding salt bath is fixedly connected to the interior of the left side of the frame body, a top plate is fixedly connected to the top of the frame body, and a direction adjusting mechanism is arranged on the left side wall of the top plate; and the direction adjusting mechanism comprises a protection box, two first motors, two first guide rails and two joint blocks, the right side wall of the protection box is fixedly connected to the left side wall of the top plate, and the bottoms of the two first motors are fixedly connected to the front side and the rear side of the interior of the protection box. By arranging the direction adjusting mechanism, the problems that the piston rod or equipment is damaged and the corrosion resistance is reduced can be solved, the front first sliding block and the rear first sliding block synchronously move under driving of the corresponding belts, and therefore the uniformity and consistency of the surface of the piston rod are effectively improved, manual intervention is reduced, the processing time is shortened, and the processing efficiency is improved. And the risk of misoperation is reduced.

Description

Technical Field

[0001] This invention relates to the field of piston rod treatment technology, and in particular to a corrosion-resistant treatment device for QPQ piston rods and its operating method. Background Technology

[0002] A corrosion-resistant treatment device for QPQ piston rods is a specialized piece of equipment designed specifically for piston rods, core transmission components widely used in hydraulics, pneumatics, and engineering machinery, to implement the QPQ surface treatment process. Its core function is to form a high-hardness, high-wear-resistance, and highly corrosion-resistant composite diffusion layer on the piston rod surface through an integrated and automated process, thereby significantly improving the service life and reliability of the piston rod.

[0003] During QPQ treatment, the piston rod needs to undergo nitriding and oxidation steps in different treatment tanks. The time and temperature of each step require precise control. The residence time of the piston rod in the treatment tank may be inconsistent, and the piston rod may collide with the edge of the treatment tank or other components, leading to damage to the piston rod or equipment, uneven surface treatment quality, and reduced corrosion resistance. During treatment, the piston rod may wobble, shift, or rotate during sliding. Due to inaccurate piston rod positioning, treatment conditions may differ between different piston rods, and different parts of the same piston rod may not receive uniform treatment, resulting in uneven treatment and insufficient contact with the treatment medium in some areas, affecting corrosion resistance. After QPQ treatment, the piston rod needs rapid cooling to ensure the quality and performance of the infiltration layer. The spray angle and coverage of the treatment solution may not be precisely controlled, and impurities in the treatment solution may deposit on the piston rod surface, affecting the treatment effect, leading to surface defects, wasted treatment solution, increased treatment costs, and ultimately, a negative impact on the treatment outcome. Summary of the Invention

[0004] The main objective of this invention is to provide a corrosion-resistant treatment device for QPQ piston rods, its operation method, and its usage method. This invention can effectively solve the problems that lead to piston rod or equipment damage, uneven surface treatment quality, decreased corrosion resistance, uneven treatment, insufficient contact of the treatment medium in some areas, affecting corrosion resistance, defects on the piston rod surface, waste of treatment liquid, increased treatment costs, and reduced treatment effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a corrosion-resistant treatment device for QPQ piston rods, comprising a frame, a nitriding salt bath tank fixedly connected to the inside of the left side of the frame, a top plate fixedly connected to the top of the frame, and an orientation adjustment mechanism provided on the left side wall of the top plate; The orientation adjustment mechanism includes a protective box, two first motors, two first guide rails, and two connecting blocks. The right side wall of the protective box is fixedly connected to the left side wall of the top plate. The bottom of each of the two first motors is fixedly connected to the front and rear sides inside the protective box. The top of each of the two first guide rails is fixedly connected to the bottom walls of the front and rear sides of the top plate. The output ends of each of the two first motors are fixedly connected to pulleys. Each of the two pulleys has a belt inside. The right side of each belt is located inside the two first guide rails. The bottom of each of the two first guide rails has a first slider. A portion of the bottom of each belt is threadedly connected to the bottom wall of the first slider through a connecting block.

[0006] Furthermore, each of the first sliders is fixedly connected to four pulleys at its top, and each of the four pulleys has a slot on the front and rear sides of a first guide rail. The bottom of each of the two first sliders is fixedly connected to a fixing plate, and the bottom of the two fixing plates is fixedly connected to a support plate. The top of the support plate is fixedly connected to a device box, and the inside of the device box is provided with a first hydraulic rod. The bottom of the telescopic ends of the four first hydraulic rods passes through the inside of the support plate and is fixedly connected to a mounting plate.

[0007] Furthermore, a clamping mechanism is provided inside the bottom wall of the mounting plate; the clamping mechanism includes: a housing, a second motor and four connecting columns. The outer side of the housing is fixedly connected to the inside of the mounting plate. The bottom wall of the housing is provided with sliding grooves. The outer side of the second motor is located inside the housing. A rotating rod is fixedly connected to the output end of the second motor. A connecting block is fixedly connected to the outer side of the bottom end of the rotating rod. A first support rod is rotatably connected to the top four corners of the connecting block.

[0008] Furthermore, the other side of each of the four first support rods is rotatably connected to the inner wall of the four connecting columns, and the outer wall of each of the four connecting columns is rotatably connected to a second support rod. The other side of each of the four second support rods is fixedly connected to a second slider. The bottom outer side of each of the four second sliders is slidably connected to the inside of the four slide grooves, and the bottom of each of the four second sliders is fixedly connected to a clamping block. An anti-slip pad is fixedly connected inside each clamping block.

[0009] Furthermore, a cleaning tank is fixedly connected to the inside right side of the frame, and baffles are fixedly connected to the top right side of the frame. A control panel is fixedly connected to the front side wall of the baffle, and a water storage tank is fixedly connected to the right side of the front side wall of the frame. A guide plate is fixedly connected to the inside of the cleaning tank, and a support column is fixedly connected to the inside of the cleaning tank. The outside of the support column is connected through the inside of the guide plate, and a placement plate is fixedly connected to the top of the support column.

[0010] Furthermore, a water inlet pipe is connected through the right side wall of the water storage tank, a base plate is fixedly connected to the front side wall of the frame, a pump is installed on the top of the base plate, a first connecting pipe is fixedly connected to the input end of the pump, the right end of the first connecting pipe is located inside the water storage tank, a transfer pipe is fixedly connected to the output end of the pump, a first branch pipe is connected to the right end of the transfer pipe, and a delivery pipe is connected to the rear end of the transfer pipe.

[0011] Furthermore, the outer side of the first branch pipe is fixedly connected to the bottom of the front side wall of the front baffle, and the rear end of the conveying pipe is connected to the second branch pipe. The outer side wall of the second branch pipe is fixedly connected to the bottom of the rear side wall of the rear baffle. The upper and lower sides of the right side wall of the frame are fixedly connected to the second guide rails. The filter plate is slidably connected inside the two second guide rails. The right side wall of the filter plate is fixedly connected to the handle. The outer right side of the filter plate is inserted through the inside of the right side of the frame.

[0012] Furthermore, a support plate is fixedly connected to the inner sidewall of each of the two baffles, and a mounting bracket is fixedly connected to the inner sidewall of each of the two support plates. A second hydraulic rod is provided on the rear sidewall of each support plate, and the front sidewall of each second hydraulic rod is fixedly connected to the rear sidewall of the mounting bracket. A first connecting rod is fixedly connected to the bottom of each mounting bracket, and a second connecting rod is rotatably connected to the outer side of the bottom of each first connecting rod. A mounting block is fixedly connected to the outer side of the bottom of the telescopic end of each second hydraulic rod, and a first hinge frame is fixedly connected to the front sidewall of each mounting block. A third support rod is rotatably connected inside each first hinge frame, and a second hinge frame is rotatably connected to the inner side of the other side of each third support rod.

[0013] Furthermore, the bottom of each second hinge frame is fixedly connected to the top of each second connecting rod, a fixing ring is connected through the inside of each second connecting rod, a second connecting pipe is fixedly connected inside the fixing ring, a flexible hose is connected to the front end of each second connecting pipe, the front ends of every two front flexible hoses are connected to the rear side wall of the first branch pipe, the rear ends of every two rear flexible hoses are connected to the front side wall of the second branch pipe, a spray pipe is connected to the rear ends of every two second connecting pipes, and a spray head is connected to the rear side wall of both spray pipes.

[0014] This invention also provides a corrosion-resistant treatment device for QPQ piston rods and a method for operating the device, the specific method including the following steps: Step 1: During the operation of the belt, a portion of its bottom is threadedly connected to the bottom wall of the first slider through a connecting block. When the belt rotates, the threaded engagement structure converts the rotational motion of the belt into the horizontal linear motion of the first slider along the length of the first guide rail. The two first sliders move synchronously under the drive of the corresponding belts, realizing the horizontal orientation adjustment of the pallet and the components above.

[0015] Step Two: After the first slider moves the pallet to the preset position directly above the nitride salt bath, the four first hydraulic rods inside the device box begin to operate. The first hydraulic rods adopt a synchronous control method, and their telescopic ends extend downward synchronously under the drive of the hydraulic system, penetrating the inside of the pallet and driving the mounting plate fixed to the bottom of the telescopic end to descend vertically.

[0016] Step 3: The second motor rotates in a different direction, allowing the second slider to slide in both directions: When the second motor rotates forward, the connecting block drives the first support rod to swing outward, and through the connecting column and the second support rod, pushes the second slider to slide along the groove away from the center.

[0017] Step 4: The mounting block pulls or pushes the third support rod via the first hinge frame. The third support rod then drives the second connecting rod to rotate around the bottom end of the first connecting rod via the second hinge frame. Since the spray pipe is connected to the second connecting rod through the fixing ring, the rotation of the second connecting rod drives the spray pipe and nozzle to rotate synchronously, achieving flexible adjustment of the spray angle.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, through its azimuth adjustment mechanism, solves the problems of piston rod or equipment damage, uneven surface treatment quality, and decreased corrosion resistance. By synchronously moving two first sliders driven by corresponding belts, the horizontal orientation of the pallet and its upper components is adjusted. Each first slider has four pulleys fixedly connected to its top, with the pulleys' outer sides embedded in the front and rear slots of the first guide rail. During the movement of the first slider, the pulleys roll along the slots, effectively improving the uniformity and consistency of the piston rod surface, reducing manual intervention, shortening processing time, and lowering the risk of operational errors.

[0019] 2. The clamping mechanism effectively solves the problems of uneven processing and insufficient contact between local areas and the processing medium, which affects corrosion resistance. Clamping blocks are fixedly connected to the bottom of each of the four second sliders, and these blocks move synchronously with the sliding of the second sliders. As the second sliders slide towards the center, the four clamping blocks move closer together until they contact the outer peripheral wall of the piston rod to be processed and apply clamping force, thus gripping and fixing the piston rod. This effectively reduces the need for manual piston rod fixing, ensuring that it will not slip, shake, or fall off during processing, reducing collisions and damage to equipment components, and extending the service life of the equipment.

[0020] 3. The design, including the filter plate, mounting bracket, second hydraulic rod, second connecting rod, mounting block, third support rod, fixing ring, hose, and nozzle, solves the problems that cause defects on the piston rod surface, waste of treatment fluid, increased treatment costs, and reduced treatment effectiveness. The mounting block pulls or pushes the third support rod via the first hinge bracket, and the third support rod, in turn, drives the second connecting rod to rotate around the bottom end of the first connecting rod via the second hinge bracket. Since the spray pipe is connected to the second connecting rod via the fixing ring, the rotation of the second connecting rod causes the spray pipe and nozzle to rotate synchronously, allowing for flexible adjustment of the spray angle. This effectively improves treatment uniformity, enhances the corrosion resistance and surface quality of the piston rod, extends the service life of the treatment fluid, and maintains long-term stable operation of the equipment.

[0021] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of a corrosion-resistant treatment device for a QPQ piston rod proposed in this invention; Figure 2 This is a top view of a corrosion-resistant treatment device for a QPQ piston rod proposed in this invention. Figure 3 This is a structural diagram of the orientation adjustment mechanism of a corrosion-resistant treatment device for a QPQ piston rod proposed in this invention; Figure 4 This is a belt structure diagram of a corrosion-resistant treatment device for a QPQ piston rod proposed in this invention; Figure 5 This is a pulley structure diagram of a corrosion-resistant treatment device for a QPQ piston rod proposed in this invention; Figure 6 This is a structural diagram of the joint block of a corrosion-resistant treatment device for a QPQ piston rod proposed in this invention; Figure 7 This is a schematic diagram of the mounting plate of a corrosion-resistant treatment device for a QPQ piston rod proposed in this invention. Figure 8 This is a cross-sectional view of the internal structure of the device box of the corrosion-resistant treatment device for QPQ piston rod proposed in this invention; Figure 9 This is a diagram of the chute structure of a corrosion-resistant treatment device for a QPQ piston rod proposed in this invention; Figure 10 This is a structural diagram of the clamping mechanism of a corrosion-resistant treatment device for a QPQ piston rod proposed in this invention; Figure 11 This is a rear structural diagram of the frame of a corrosion-resistant treatment device for a QPQ piston rod proposed in this invention; Figure 12This is a cross-sectional view of the internal structure of the water tank of the corrosion-resistant treatment device for the QPQ piston rod proposed in this invention. Figure 13 This is a structural diagram of the filter plate of a corrosion-resistant treatment device for a QPQ piston rod proposed in this invention; Figure 14 This is a structural diagram of the first branch pipe of a corrosion-resistant treatment device for a QPQ piston rod proposed in this invention. Figure 15 This is a structural diagram of the spray pipe of a corrosion-resistant treatment device for a QPQ piston rod proposed in this invention; Figure 16 This is a structural diagram of the second connecting pipe of a corrosion-resistant treatment device for a QPQ piston rod proposed in this invention.

[0023] Legend: 1. Frame; 2. Nitrogen salt bath; 3. Top plate; 4. Orientation adjustment mechanism; 401. Protective box; 402. First motor; 403. First guide rail; 404. Pulley; 405. Belt; 406. First slider; 407. Pulley; 408. Connecting block; 409. Fixing plate; 410. Support plate; 411. Device box; 412. First hydraulic rod; 413. Mounting plate; 5. Clamping mechanism; 501. Outer shell; 502. Slide groove; 503. Second motor; 504. Rotating rod; 505. Connecting block; 506. First support rod; 507. Connecting column; 508. Second support rod; 509. Second slider; 510. Clamping block; 511. Anti-slip pad; 6. Cleaning 7. Washing tank; 8. Baffle; 9. Water storage tank; 10. Guide plate; 11. Support column; 12. Placement tray; 13. Control panel; 14. Water inlet pipe; 15. Base plate; 16. Pump; 17. First connecting pipe; 18. Transfer pipe; 19. First branch pipe; 20. Delivery pipe; 21. Second branch pipe; 22. Second guide rail; 23. Filter plate; 24. Handle; 25. Support plate; 26. Mounting bracket; 27. Second hydraulic rod; 28. First connecting rod; 29. ​​Second connecting rod; 30. Mounting block; 31. First hinge frame; 32. Third support rod; 33. Second hinge frame; 34. Fixing ring; 35. Second connecting pipe; 36. Hose; 37. Spray pipe; 38. Spray head. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0025] like Figure 1 - Figure 8As shown: A corrosion-resistant treatment device for QPQ piston rods includes a frame 1. A nitride salt bath 2 is fixedly connected to the inside of the left side of the frame 1. The frame 1 provides external support for the nitride salt bath 2 and the cleaning tank 6 inside, and also provides bottom support for the top plate 3. The top plate 3 is fixedly connected to the top of the frame 1, and an orientation adjustment mechanism 4 is provided on the left side wall of the top plate 3. Orientation adjustment mechanism 4: includes a protective box 401, two first motors 402, two first guide rails 403 and two connecting blocks 408. The right side wall of the protective box 401 is fixedly connected to the left side wall of the top plate 3. The bottoms of the two first motors 402 are fixedly connected to the front and rear sides inside the protective box 401. By fixing the protective box 401 to the left side wall of the top plate 3, the two first motors 402 inside are protected from the outside. The tops of the two first guide rails 403 are fixedly connected to the front and rear bottom walls of the top plate 3. The output ends of the two first motors 402 are fixedly connected to pulleys 404. The inside of the two pulleys 404 is provided with belts 405. The right side of the two belts 405 is located inside the two first guide rails 403. By starting the two first motors 402 synchronously, the output end of the first motor 402 drives the pulleys 404 fixedly connected to it to rotate. When the pulleys 404 rotate, they drive the belts 405 fitted inside them to rotate synchronously. Since the right side of the belts 405 extends into the first guide rails 403 at the bottom of the top plate 3, a closed transmission path is formed.

[0026] Each of the two first guide rails 403 has a first slider 406 at its bottom. A portion of the bottom of each belt 405 is threadedly connected to the bottom wall of the first slider 406 via a connecting block 408. Each first slider 406 has four pulleys 407 fixedly connected to its top. The outer sides of each set of four pulleys 407 are provided with slots on the front and rear sides of a first guide rail 403. The belt 405 is threadedly connected to the bottom wall of the first slider 406 via the bottom of the belt and the connecting block 408. When the belt rotates, the threaded force drives the first slider 406 to slide along the direction of the first guide rail 403. At the same time, the four pulleys 407 on the top of the first slider 406 are embedded in the slots on the front and rear sides of the first guide rail 403. The rolling of the pulleys can reduce the frictional resistance between the slider and the guide rail, ensuring the smoothness and displacement accuracy of the sliding process and preventing the slider from deviating.

[0027] Each of the two first sliders 406 has a fixed plate 409 fixedly connected to its bottom. The two fixed plates 409 have a support plate 410 fixedly connected to their bottom. The support plate 410 has a device box 411 fixedly connected to its top. Each device box 411 has a first hydraulic rod 412 inside. The bottom ends of the four first hydraulic rods 412 penetrate the inside of the support plate 410 and are fixedly connected to a mounting plate 413. Because the two first sliders 406 are fixed to their bottom with the fixed plates 409, and the support plate 410 is connected below the fixed plates, the horizontal movement of the sliders will synchronously drive the support plate 410 and the device box 411 above to adjust their horizontal position, thus completing the horizontal movement and positioning of the piston rod. Then, the four first hydraulic rods 412 inside the device box 411 receive a control signal and extend and retract synchronously. The bottom ends of their extension and retraction ends penetrate the support plate 410 and are fixedly connected to the mounting plate 413. Therefore, the extension and retraction of the hydraulic rods will drive the mounting plate 413 to rise and fall vertically. Since the mounting plate 413 is used to fix the piston rod to be processed, the vertical position of the piston rod can be adjusted.

[0028] like Figure 1 - Figure 10 As shown, a clamping mechanism 5 is provided inside the bottom wall of the mounting plate 413. The clamping mechanism 5 includes: a housing 501, a second motor 503, and four connecting columns 507. The outer side of the housing 501 is fixedly connected to the inside of the mounting plate 413. The bottom wall of the housing 501 is provided with sliding grooves 502. The outer side of the second motor 503 is located inside the housing 501. By fixing the housing 501 inside the 413, a stable support is provided for the entire mechanism, and the housing 501 is used to protect the device inside. Thus, when the 413 slides up and down, it drives the 5 inside to slide up and down.

[0029] The output end of the second motor 503 is fixedly connected to a rotating rod 504. A connecting block 505 is fixedly connected to the outer bottom end of the rotating rod 504. A first support rod 506 is rotatably connected to each of the four corners of the top of the connecting block 505. The other side of each of the four first support rods 506 is rotatably connected to the inner wall of four connecting posts 507. The second motor 503 is activated by receiving a control signal, and its output end drives the rotating rod 504, which is fixedly connected to it, to rotate. The rotation of the rotating rod 504 synchronously drives the connecting block 505 to perform circular motion. The four first support rods 506 are rotatably connected to the four corners of the top of the 505 via rotating shafts, forming a symmetrical four-bar linkage structure. When the connecting block 505 moves, it applies a pushing or pulling force to the connecting column 507 through the first support rod 506. If the connecting block 505 rotates forward under the drive of the second motor 503, the first support rod 506 will open outward, pushing the four connecting columns 507 to move outward synchronously. If the connecting block 505 rotates in reverse under the drive of the second motor 503, the first support rod 506 will close inward, pulling the four connecting columns 507 to move inward synchronously.

[0030] Each of the four connecting posts 507 has a second support rod 508 rotatably connected to its outer side wall. Each of the four second support rods 508 has a second slider 509 fixedly connected to its other side. The bottom outer sides of the four second sliders 509 are slidably connected to the interior of four sliding grooves 502. Each bottom of the four second sliders 509 has a clamping block 510 fixedly connected to its bottom. Each clamping block 510 has an anti-slip pad 511 fixedly connected inside its interior. Each connecting post 507 is rotatably connected to a second support rod 508 via a pivot shaft. The other end of the second support rod 508 is fixedly connected to the second slider 509. Because the bottom outer sides of the second slider 509 are slidably embedded in the sliding groove 502 on the bottom wall of the outer casing 501, the sliding groove 502 constrains the movement direction of the second slider 509, allowing it to slide only radially along the groove. Therefore, the movement of the connecting post 507 will cause the second slider 509 to slide synchronously radially along the sliding groove 502 via the second support rod 508, moving inwards or outwards.

[0031] Furthermore, when the second slider 509 slides inward along the groove 502, the four clamping blocks 510 simultaneously move towards the center, gradually reducing the enclosed space until they contact the piston rod surface and apply clamping force, thus completing the clamping of the piston rod. When the second slider 509 slides outward along the groove 502, the four clamping blocks 510 simultaneously open outward, increasing the enclosed space, releasing the constraint on the piston rod, and achieving release. The anti-slip pad 511 fixed inside the clamping block 510 further enhances the clamping stability: on the one hand, the deformation of the rubber material increases the friction with the piston rod surface, preventing the piston rod from slipping due to vibration or tilting during clamping; on the other hand, it avoids surface scratches caused by rigid contact between the clamping block 510 and the piston rod, protecting the original precision of the piston rod.

[0032] like Figure 1 - Figure 12 As shown, a cleaning tank 6 is fixedly connected to the right side of the interior of the frame 1, and baffles 7 are fixedly connected to the top right side of the frame 1. The baffles 7 provide support for the bottom of the top plate 3 on the right side and prevent cleaning fluid from spraying outwards during piston rod cleaning. A control panel 12 is fixedly connected to the front wall of the front baffle 7 for controlling the entire device. A water storage tank 8 is fixedly connected to the right side of the front wall of the frame 1. A guide plate 9 is fixedly connected to the interior of the cleaning tank 6, and a support column 10 is fixedly connected to the interior of the cleaning tank 6. The outer side of the support column 10 is connected through the interior of the guide plate 9, and a placement plate 11 is fixedly connected to the top of the support column 10. The cleaning system uses the cleaning tank 6 as a second processing space and the water storage tank 8 provides the cleaning water source. The guide plate 9 guides the water flow path, allowing the used liquid to flow into the interior of the water storage tank 8. The support column 10 and the placement plate 11 ensure the stable placement of the piston rod.

[0033] like Figure 1 - Figure 14 As shown, a water inlet pipe 13 is connected through the right side wall of the water storage tank 8, which connects to external pipes, water tanks, etc., to transport external liquids into the interior of the water storage tank 8. A base plate 14 is fixedly connected to the front side wall of the frame 1, and a pump 15 is installed on the top of the base plate 14, which supports and fixes the pump 15.

[0034] The input end of the pump 15 is fixedly connected to a first connecting pipe 16, the right end of which is located inside the water storage tank 8. The output end of the pump 15 is fixedly connected to a transfer pipe 17, the right end of which is connected to a first branch pipe 18, and the rear end of the transfer pipe 17 is connected to a delivery pipe 19. The outer side of the first branch pipe 18 is fixedly connected to the bottom of the front wall of the front baffle 7, and the rear end of the delivery pipe 19 is connected to a second branch pipe 20. When the pump 15 is powered on and started, electrical energy is converted into hydraulic energy. A negative pressure suction is formed. The input end of the pump 15 is connected to the water storage tank 8 through the first connecting pipe 16. The right end of the first connecting pipe 16 extends into the water storage tank. Under the negative pressure of the pump, the clean water in the water storage tank is sucked into the pump 15 through the first connecting pipe 16. The output end of the pump 15 is connected to the adapter pipe 17. The adapter pipe adopts a three-way structure design to divide the high-pressure water flow output by the pump into two paths: one path leads to the first branch pipe 18 on the right, and the other path is transported to the interior of the second branch pipe 20 through the rear delivery pipe 19.

[0035] The outer wall of the second branch pipe 20 is fixedly connected to the bottom of the rear side wall of the rear baffle 7. Second guide rails 21 are fixedly connected to the upper and lower sides of the inner right side wall of the frame 1. Filter plates 22 are slidably connected inside the two second guide rails 21. A handle 23 is fixedly connected to the right side wall of the filter plate 22. The outer right side of the filter plate 22 extends through the inner right side of the frame 1. When cleaning the piston rod on the placement plate 11 with liquid, the used liquid flows forward through the guide plate 9 and intercepts solid salt residue and impurities through the filter plate 22 fixed to the second guide rail 21 inside the right side wall of the frame 1, reducing the difficulty of subsequent wastewater treatment. The filter plate 22 slides with the second guide rail 21 for easy cleaning. When a large amount of impurities accumulate on the filter plate 22, the operator pulls the handle 23 on the right side wall of the filter plate 22 to pull it out from the right side of the frame 1 along the second guide rail 21 for cleaning, making resetting convenient. The baffle 7 protects the filtration area from splashing out sewage. The liquid that passes through the filter plate 22 will re-enter the interior of the water storage tank 8 and be drawn back through the first connecting pipe 16 to achieve the effect of recycling.

[0036] like Figure 1 - Figure 15As shown, support plates 24 are fixedly connected to the inner walls of both baffles 7, and mounting brackets 25 are fixedly connected to the inner walls of both support plates 24. A second hydraulic rod 26 is provided on the rear wall of each support plate 24, and the front wall of each second hydraulic rod 26 is fixedly connected to the rear wall of the mounting bracket 25. A first connecting rod 27 is fixedly connected to the bottom of each mounting bracket 25. The support plates 24 are fixed to the inner walls of the two baffles 7 respectively, and the support plates serve as intermediate support members, fixing the mounting brackets 25 to the inner side of the baffles to form a rigid support structure. The mounting brackets 25 provide an installation reference for the second hydraulic rods 26 and the first connecting rods 27, ensuring the relative position stability of the power components and transmission components and preventing structural displacement during movement.

[0037] Each first connecting rod 27 is rotatably connected to a second connecting rod 28 at its bottom outer side. Each second hydraulic rod 26 is fixedly connected to a mounting block 29 at its bottom outer side. Each mounting block 29 is fixedly connected to a first hinge frame 30 on its front side wall. Each first hinge frame 30 is rotatably connected to a third support rod 31 inside. Each third support rod 31 is rotatably connected to a second hinge frame 32 on its other side inside. When the extension end of the second hydraulic rod 26 extends, it drives the mounting block 29 fixed to its outer side to move downward synchronously. Conversely, when the telescopic end retracts, the mounting block moves upward, and the first hinge frame 30 on the front side wall of the mounting block 29 is rotatably connected to one end of the third support rod 31. The linear movement of the mounting block pushes the third support rod 31 to rotate around the connection point through the first hinge frame 30. When extended, the third support rod 31 swings downward, and when retracted, it swings upward. The other end of the third support rod 31 is connected to the top of the second connecting rod 28 through the second hinge frame 32. The swing of the third support rod 31 drives the second connecting rod 28 to rotate around its connection point with the first connecting rod 27. When the third support rod 31 swings downward, the second connecting rod 28 tilts backward; when it swings upward, the second connecting rod 28 tilts forward.

[0038] like Figure 1 - Figure 16 As shown, the bottom of each second hinge frame 32 is fixedly connected to the top of each second connecting rod 28. A fixing ring 33 is connected through the inside of each second connecting rod 28. A second connecting pipe 34 is fixedly connected inside each fixing ring 33. The second connecting pipe 34 is fixed inside the fixing ring 33 through the fixing ring 33. The rear end of the second connecting pipe 34 is connected to the spray pipe 36. Therefore, the rotation of the second connecting rod 28 will synchronously drive the spray pipe 36 and the nozzle 37 to rotate around the axis of the first connecting rod and the second connecting rod 28, so as to realize the adjustment of the spray angle in the vertical direction.

[0039] Each second connecting pipe 34 has a hose 35 connected to its front end. The front ends of every two front hoses 35 are connected to the rear wall of the first branch pipe 18, and the rear ends of every two rear hoses 35 are connected to the front wall of the second branch pipe 20. Each pair of second connecting pipes 34 has a spray pipe 36 connected to its rear end, and each of the two spray pipes 36 has a nozzle 37 connected to its rear wall. The two front hoses 35 are connected to the first branch pipe 18, and the two rear hoses 35 are connected to the second branch pipe 20, receiving the high-pressure water flow from the pump. The hoses 35 are made of flexible material. It can bend freely with the rotation of the second connecting rod 28 to avoid pipe breakage or blockage during angle adjustment. The rear ends of the two rear hoses 35 are connected to the second connecting pipe 34. The second connecting pipe 34 is rigidly connected to the second connecting rod 28 through the fixing ring 33 to ensure that the pipe moves synchronously with the connecting rod. The rear end of the second connecting pipe 34 is connected to the spray pipe 36 to guide the water flow into the spray pipe 36. The spray pipe 36 is long and narrow, with multiple nozzles 37 evenly distributed on the rear side wall. The nozzles adopt a direct-shoot design to convert the high-pressure water flow delivered by the second connecting pipe 34 into a dense jet that directly washes the piston rod surface on the placement plate 11.

[0040] The present invention provides a corrosion-resistant treatment device for QPQ piston rod and its operation method, which specifically includes the following steps: Step 1: During the operation of belt 405, a part of its bottom is threadedly connected to the bottom wall of first slider 406 through engagement block 408. When belt 405 rotates, the threaded engagement structure converts the rotational motion of belt 405 into horizontal linear motion of first slider 406 along the length direction of first guide rail 403. The two first sliders 406 move synchronously under the drive of the corresponding belt 405, realizing the horizontal orientation adjustment of pallet 410 and the upper component; Step 2: After the first slider 406 moves the support plate 410 to the preset position directly above the nitriding salt bath 2, the four first hydraulic rods 412 inside the device box 411 begin to work. The first hydraulic rods 412 adopt a synchronous control method, and their telescopic ends extend downward synchronously under the drive of the hydraulic system, penetrate the inside of the support plate 410, and then drive the mounting plate 413 fixed at the bottom of the telescopic end to descend vertically; Step 3: The second motor 503 rotates in different directions, and the second slider 509 can slide in both directions: When the second motor 503 rotates forward, the connecting block 505 drives the first support rod 506 to swing outward, and pushes the second slider 509 to slide along the slide groove 502 away from the center through the connecting column 507 and the second support rod 508. Step 4: The mounting block 29 pulls or pushes the third support rod 31 through the first hinge frame 30. The third support rod 31 then drives the second connecting rod 28 to rotate around the bottom end of the first connecting rod 27 through the second hinge frame 32. Since the spray pipe 36 is connected to the second connecting rod 28 through the fixing ring 33, the rotation of the second connecting rod 28 drives the spray pipe 36 and the nozzle 37 to rotate synchronously, realizing flexible adjustment of the spray angle.

[0041] It should be noted that the present invention is a corrosion-resistant treatment device for QPQ piston rods, firstly.

[0042] When the device is started, the two first motors 402, fixed inside the protective box 401 on both the front and rear sides, are synchronously powered and operate. As the power core of the entire orientation adjustment mechanism 4, the first motor 402 converts electrical energy into rotational mechanical energy through its output shaft, driving the pulley 404 fixed on the output shaft to rotate synchronously. The synchronous design of the two first motors 402 ensures the force balance of subsequent transmission and execution components, avoiding motion deviation caused by unilateral power output. When the pulley 404 rotates under the drive of the first motor 402, it drives the belt 405 sleeved on the outside of the pulley 404 to rotate through friction. The belt 405 is made of high-strength, wear-resistant material, which can stably transmit the rotational motion of the pulley 404 to the inside of the first guide rail 403.

[0043] Since the two first motors 402 and their corresponding pulleys 404 and belts 405 are symmetrically distributed, the power transmission speed and direction on both the front and rear sides are completely consistent, laying the foundation for the synchronous movement of the subsequent sliders. During the operation of the belt 405, a portion of its bottom is threadedly connected to the bottom wall of the first slider 406 via a connecting block 408. When the belt 405 rotates, the threaded engagement structure converts the rotational motion of the belt 405 into the horizontal linear motion of the first slider 406 along the length of the first guide rail 403.

[0044] The two first sliders 406 move synchronously under the drive of their corresponding belts 405, achieving horizontal orientation adjustment of the support plate 410 and the components above it. Each first slider 406 has four pulleys 407 fixedly connected to its top, with the pulleys 407 embedded in the slots on the front and rear sides of the first guide rail 403. During the movement of the first slider 406, the pulleys 407 roll along the slots, providing precise guidance for the slider's movement, ensuring it always moves along the guide rail axis and avoiding deviation; and converting the sliding friction between the slider and the guide rail into rolling friction, significantly reducing motion resistance, minimizing component wear, and simultaneously acting as a buffer and shock absorber to ensure smooth movement.

[0045] When the first slider 406 moves the support plate 410 to a preset position directly above the nitride salt bath 2, the four first hydraulic rods 412 inside the device box 411 begin to operate. The first hydraulic rods 412 are synchronously controlled; their extension ends extend downwards synchronously under the drive of the hydraulic system, penetrating the interior of the support plate 410 and driving the mounting plate 413 fixed at the bottom of the extension end to descend vertically. The mounting plate 413 is used to fix the piston rod to be processed. By controlling the extension and retraction of the first hydraulic rods 412, the descent height of the piston rod can be precisely adjusted, ensuring the piston rod is fully immersed in the nitride salt bath 2, or the immersion depth can be adjusted according to processing requirements. After the piston rod is immersed in the nitride salt bath 2 under the drive of the first hydraulic rods 412, the nitride salt in the nitride salt bath 2 is maintained at the process temperature required for QPQ processing, typically 500-600℃, under the action of the heating and insulation system.

[0046] The piston rod undergoes a chemical reaction in the nitriding salt bath, forming a dense nitriding layer on its surface, thus achieving excellent corrosion resistance. After treatment, the telescopic ends of the first hydraulic rod 412 retract synchronously, driving the mounting plate 413 and the piston rod to rise above the nitriding salt bath surface. Subsequently, the first motor 402 rotates in reverse, moving the piston rod to the unloading position via belts 405 and 4, completing one QPQ corrosion resistance treatment cycle.

[0047] When the device needs to grasp the piston rod, the second motor 503, fixed inside the housing 501, is energized and started. The second motor 503, as the power source of the clamping mechanism 5, converts electrical energy into rotational mechanical energy. Its output shaft drives the rotating rod 504, fixed to the shaft end, to rotate synchronously. The rotating rod 504 is made of high-strength metal to ensure no deformation occurs during power transmission. When the rotating rod 504 rotates, the connecting block 505 fixed to its outer bottom end moves in a circular motion along with the rotating rod 504. The four corners of the top of the connecting block 505 are rotatably connected to one end of each of the four first support rods 506 via pins. When the connecting block 505 rotates, the four first support rods 506 swing synchronously around the connecting block 505 as the center, driven by the transmission action of the pins. Because the four first support rods 506 are symmetrically distributed, the rotational motion of the connecting block 505 is converted into a uniform and synchronous swinging motion of the four first support rods 506, ensuring the symmetry and stability of subsequent clamping actions.

[0048] The other ends of the four first support rods 506 are rotatably connected to the inner walls of the four connecting posts 507 via pins, while the outer walls of the four connecting posts 507 are rotatably connected to one end of the four second support rods 508 via pins. When the first support rods 506 swing, the second support rods 508 swing synchronously due to the rotational action of the connecting posts 507. The other end of the second support rods 508 is fixedly connected to the second slider 509, and the outer bottom of the second slider 509 is embedded in the groove 502 opened in the bottom wall of the outer casing 501, and slides in cooperation with the groove 502. Therefore, the swinging motion of the second support rods 508 is further converted into the horizontal sliding motion of the second slider 509 along the length of the groove 502. Depending on the rotation direction of the second motor 503, the second slider 509 can slide in both directions: when the second motor 503 rotates forward, the connecting block 505 drives the first support rod 506 to swing outward, and pushes the second slider 509 along the slide groove 502 away from the center through the connecting column 507 and the second support rod 508; when the second motor 503 rotates in reverse, the connecting block 505 drives the first support rod 506 to swing inward, and pulls the second slider 509 along the slide groove 502 towards the center, thereby realizing the switching of the opening and closing action of the clamping mechanism 5.

[0049] Each of the four second sliders 509 has a clamping block 510 fixedly connected to its bottom. The clamping blocks 510 move synchronously with the sliding of the second sliders 509. When the second sliders 509 slide towards the center, the four clamping blocks 510 move closer to each other until they contact the outer peripheral wall of the piston rod to be treated and apply clamping force, thus completing the gripping and fixing of the piston rod. After the piston rod has completed the nitriding treatment, the second sliders 509 slide outward, causing the four clamping blocks 510 to move away from each other, releasing the piston rod so that the material can be unloaded.

[0050] Cleaning water, typically clean water or a weakly alkaline cleaning solution, is injected into the water storage tank 8 through the inlet pipe 13. The water storage tank 8, serving as a water source reserve unit, is fixed to the right side of the front wall of the frame 1, providing a continuous and stable water supply for the entire cleaning process and facilitating daily water replenishment and maintenance. After starting the pump 15, it draws cleaning water from the water storage tank 8 through the first connecting pipe 16 at its input end, converting electrical energy into liquid pressure energy. The high-pressure water flow is split through the transfer pipe 17 at the output end of the pump 15; one part enters the first branch pipe 18 on the front side, and the other part is transported to the second branch pipe 20 on the rear side through the delivery pipe 19, achieving synchronous water supply to the front and rear spray pipes. The base plate 14 provides stable installation support for the pump 15, ensuring structural stability during operation.

[0051] The second hydraulic rod 26, fixed to the inner wall support plate 24 of the front and rear side baffles 7, is the core power component for adjusting the spray angle. When the telescopic end of the second hydraulic rod 26 extends or retracts, it drives the mounting block 29 fixed at its bottom to move synchronously. The mounting block 29 pulls or pushes the third support rod 31 through the first hinge frame 30, and the third support rod 31 then drives the second connecting rod 28 to rotate around the bottom end of the first connecting rod 27 through the second hinge frame 32. Since the spray pipe 36 is connected to the second connecting rod 28 through the fixing ring 33, the rotation of the second connecting rod 28 drives the spray pipe 36 and the nozzle 37 to rotate synchronously, realizing flexible adjustment of the spray angle. Among them, the mounting frame 25 provides a mounting and fixing point for the second hydraulic rod 26 to ensure stability during the adjustment process. The first branch pipe 18 and the second branch pipe 20 are respectively connected to the second connecting pipe 34 through the hose 35. High-pressure water flows through the branch pipe and the hose 35 into the second connecting pipe 34, and finally sprays out through multiple nozzles 37 at the rear end of the spray pipe 36. The flexible design of the hose 35 adapts to the displacement requirements of the spray pipe 36 when it rotates, thus avoiding damage to the pipeline.

[0052] After nitriding, the piston rod is moved to the top of the cleaning tank 6 by the orientation adjustment mechanism. After the clamping mechanism is released, the piston rod is placed on the placement plate 11 inside the cleaning tank 6. The placement plate 11 is fixed to the top of the support column 10, which passes through the guide plate 9 and is fixedly connected to the cleaning tank 6, providing stable support for the placement plate 11 and ensuring that the piston rod is stationary for easy cleaning. The cleaning wastewater carrying salt residue drips onto the guide plate 9, which is designed to be inclined, using gravity to guide the wastewater to the bottom of the cleaning tank 6 to avoid sludge accumulation. The design of the support column 10 passing through the guide plate 9 ensures stable support without affecting the flow of wastewater.

[0053] Wastewater collected at the bottom of the cleaning tank 6 flows through the opening on the right side wall of the frame 1 into the filtration area. The filter plate 22, fixed to the second guide rail 21 inside the right side wall of the frame 1, intercepts solid salt residue and impurities, reducing the difficulty of subsequent wastewater treatment. The filter plate 22 slides along the second guide rail 21 for easy cleaning. When a large amount of impurities accumulates on the filter plate 22, the operator pulls the handle 23 on the right side wall of the filter plate 22 to remove it from the right side of the frame 1 along the second guide rail 21 for cleaning; resetting is convenient. The baffle 7 protects the filtration area from wastewater splashing.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant treatment device for a QPQ piston rod, comprising a frame (1), characterized in that: A nitride salt bath (2) is fixedly connected to the inside of the left side of the frame (1), and a top plate (3) is fixedly connected to the top of the frame (1). An orientation adjustment mechanism (4) is provided on the left side wall of the top plate (3). The orientation adjustment mechanism (4) includes a protective box (401), two first motors (402), two first guide rails (403), and two connecting blocks (408). The right side wall of the protective box (401) is fixedly connected to the left side wall of the top plate (3). The bottom of the two first motors (402) is fixedly connected to the front and rear sides inside the protective box (401). The top of the two first guide rails (403) is fixedly connected to the bottom walls of the front and rear sides of the top plate (3). The output ends of the two first motors (402) are fixedly connected to pulleys (404). The inside of the two pulleys (404) is provided with belts (405). The right side of the two belts (405) is provided inside the two first guide rails (403). The bottom of the two first guide rails (403) is provided with first sliders (406). A portion of the bottom of each belt (405) is threadedly connected to the bottom wall of the first slider (406) through a connecting block (408).

2. The corrosion-resistant treatment device for a QPQ piston rod according to claim 1, characterized in that: Each of the first sliders (406) has four pulleys (407) fixedly connected to its top. Each of the four pulleys (407) has a slot on the front and rear sides of a first guide rail (403) on its outer side. Each of the two first sliders (406) has a fixed plate (409) fixedly connected to its bottom. Each of the two fixed plates (409) has a support plate (410) fixedly connected to its bottom. Each support plate (410) has a device box (411) fixedly connected to its top. Each device box (411) has a first hydraulic rod (412) inside it. The bottom of the telescopic ends of the four first hydraulic rods (412) passes through the inside of the support plate (410) and is fixedly connected to a mounting plate (413).

3. The corrosion-resistant treatment device for a QPQ piston rod according to claim 2, characterized in that: The mounting plate (413) has a clamping mechanism (5) inside its bottom wall; the clamping mechanism (5) includes: a housing (501), a second motor (503) and four connecting columns (507). The outer side of the housing (501) is fixedly connected to the inside of the mounting plate (413). The bottom wall of the housing (501) is provided with a sliding groove (502). The outer side of the second motor (503) is located inside the housing (501). The output end of the second motor (503) is fixedly connected to a rotating rod (504). The bottom end of the rotating rod (504) is fixedly connected to a connecting block (505). The top four corners of the connecting block (505) are rotatably connected to a first support rod (506).

4. The corrosion-resistant treatment device for a QPQ piston rod according to claim 3, characterized in that: The other side of each of the four first support rods (506) is rotatably connected to the inner wall of each of the four connecting columns (507). The outer wall of each of the four connecting columns (507) is rotatably connected to a second support rod (508). The other side of each of the four second support rods (508) is fixedly connected to a second slider (509). The bottom outer side of each of the four second sliders (509) is slidably connected to the inside of each of the four slide grooves (502). The bottom of each of the four second sliders (509) is fixedly connected to a clamping block (510). The inside of each clamping block (510) is fixedly connected to an anti-slip pad (511).

5. The corrosion-resistant treatment device for a QPQ piston rod according to claim 1, characterized in that: A cleaning tank (6) is fixedly connected to the inside right side of the frame (1). A baffle (7) is fixedly connected to the top right side of the frame (1). A control panel (12) is fixedly connected to the front side wall of the baffle (7). A water storage tank (8) is fixedly connected to the right side of the front side wall of the frame (1). A guide plate (9) is fixedly connected to the inside of the cleaning tank (6). A support column (10) is fixedly connected to the inside of the cleaning tank (6). The outside of the support column (10) is connected through the inside of the guide plate (9). A placement plate (11) is fixedly connected to the top of the support column (10).

6. The corrosion-resistant treatment device for a QPQ piston rod according to claim 5, characterized in that: A water inlet pipe (13) is connected through the right side wall of the water storage tank (8). A base plate (14) is fixedly connected to the front side wall of the frame (1). A pump (15) is installed on the top of the base plate (14). A first connecting pipe (16) is fixedly connected to the input end of the pump (15). The right end of the first connecting pipe (16) is located inside the water storage tank (8). A transfer pipe (17) is fixedly connected to the output end of the pump (15). A first branch pipe (18) is connected to the right end of the transfer pipe (17). A delivery pipe (19) is connected to the rear end of the transfer pipe (17).

7. The corrosion-resistant treatment device for a QPQ piston rod according to claim 6, characterized in that: The outer side of the first branch pipe (18) is fixedly connected to the bottom of the front side wall of the front baffle (7). The rear end of the conveying pipe (19) is connected to the second branch pipe (20). The outer side wall of the second branch pipe (20) is fixedly connected to the bottom of the rear side wall of the rear baffle (7). The upper and lower sides of the right side wall of the frame (1) are fixedly connected to the second guide rail (21). The filter plate (22) is slidably connected inside the two second guide rails (21). The right side wall of the filter plate (22) is fixedly connected to the handle (23). The outer side of the filter plate (22) is through the inside of the right side of the frame (1).

8. The corrosion-resistant treatment device for a QPQ piston rod according to claim 5, characterized in that: The inner walls of the two baffles (7) are fixedly connected to support plates (24), the inner walls of the two support plates (24) are fixedly connected to mounting brackets (25), the rear wall of each support plate (24) is provided with a second hydraulic rod (26), the front wall of each second hydraulic rod (26) is fixedly connected to the rear wall of the mounting bracket (25), the bottom of each mounting bracket (25) is fixedly connected to a first connecting rod (27), the bottom outer side of each first connecting rod (27) is rotatably connected to a second connecting rod (28), the bottom outer side of the telescopic end of each second hydraulic rod (26) is fixedly connected to a mounting block (29), the front wall of each mounting block (29) is fixedly connected to a first hinge frame (30), the inside of each first hinge frame (30) is rotatably connected to a third support rod (31), and the other side of each third support rod (31) is rotatably connected to a second hinge frame (32).

9. The corrosion-resistant treatment device for a QPQ piston rod according to claim 8, characterized in that: The bottom of each second hinge frame (32) is fixedly connected to the top of each second connecting rod (28). A fixing ring (33) is connected through the inside of each second connecting rod (28). A second connecting pipe (34) is fixedly connected inside the fixing ring (33). A hose (35) is connected to the front end of each second connecting pipe (34). The front ends of every two front hoses (35) are connected to the rear side wall of the first branch pipe (18). The rear ends of every two rear hoses (35) are connected to the front side wall of the second branch pipe (20). A spray pipe (36) is connected to the rear end of every two second connecting pipes (34). A nozzle (37) is connected to the rear side wall of every two spray pipes (36).

10. A method of using the corrosion-resistant treatment device for a QPQ piston rod according to any one of claims 1-9, characterized in that: The specific method includes the following steps: Step 1: During the operation of the belt (405), a part of its bottom is connected to the bottom wall of the first slider (406) by a threaded connection through the connecting block (408). When the belt (405) rotates, the threaded engagement structure converts the rotational motion of the belt (405) into the horizontal linear motion of the first slider (406) along the length of the first guide rail (403). The two first sliders (406) move synchronously under the drive of the corresponding belt (405), realizing the horizontal orientation adjustment of the pallet (410) and the upper component. Step 2: After the first slider (406) moves the pallet (410) to the preset position directly above the nitriding salt bath (2), the four first hydraulic rods (412) inside the device box (411) begin to work. The first hydraulic rods (412) adopt a synchronous control method, and their telescopic ends extend downward synchronously under the drive of the hydraulic system, penetrate the inside of the pallet (410), and then drive the mounting plate (413) fixed at the bottom of the telescopic end to descend vertically; Step 3: The second motor (503) rotates in different directions, and the second slider (509) can slide in both directions: When the second motor (503) rotates forward, the connecting block (505) drives the first support rod (506) to swing outward, and pushes the second slider (509) to slide away from the center along the slide groove (502) through the connecting column (507) and the second support rod (508); Step 4: The mounting block (29) pulls or pushes the third support rod (31) through the first hinge frame (30), and the third support rod (31) then drives the second connecting rod (28) to rotate around the bottom end of the first connecting rod (27) through the second hinge frame (32). Since the spray pipe (36) is connected to the second connecting rod (28) through the fixing ring (33), the rotation of the second connecting rod (28) drives the spray pipe (36) and the nozzle (37) to rotate synchronously, so as to realize the flexible adjustment of the spray angle.

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