A dipping device for pump impeller

Abstract

The present invention belongs to the technical field of dipping equipment. The present invention discloses a dipping equipment for a pump body impeller, comprising a base, a sealing plate fixedly arranged on the upper wall of the base, an inner cylinder detachably arranged on the upper side of the sealing plate, and an outer cylinder vertically sliding on the base; a mounting frame is fixedly provided on the upper edge of the inner wall of the outer cylinder, an air pressure release component is fixedly provided on the upper wall of the mounting frame, and a detection dilution component is fixedly provided on the lower wall of the mounting frame, and the air pressure release component is connected to the air channel of the detection dilution component, thereby realizing real-time monitoring and automatic dilution of the viscosity of the dipping liquid, driving the air pressure signal through the change in resistance of the detection plate, accurately controlling the injection of the diluent, improving the consistency of the coating, reversely activating the negative pressure generated by the air pump, ensuring that the coating evenly covers the complex impeller flow channel, reducing dead angles, and the integrated and modular design makes the equipment compact and easy to maintain, effectively reducing operating costs, and significantly improving product quality and production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of dipping equipment, and in particular relates to a dipping equipment for a pump impeller. Background Art

[0002] The pump impeller is a core component of fluid machinery. The uniformity and integrity of its surface coating (such as anti-corrosion and wear-resistant coating) directly affects the pump's operating efficiency, energy consumption and service life. Due to the complex structure of the impeller (multiple curved surfaces, narrow flow channels, and irregular blades), the dip coating process has become a key means to achieve full coverage coating. However, existing dip coating equipment has some technical defects that need to be improved in practical applications:

[0003] (1) Dip coatings (such as epoxy resins and polyamides) are prone to viscosity changes due to solvent volatilization. Existing equipment lacks a real-time viscosity sensing mechanism and relies solely on manual sampling and testing. This results in a failure to intervene in time when the viscosity exceeds the standard. When the viscosity is too high, the coating has poor fluidity and is prone to forming "thin coating" or "missing coating" deep in the impeller flow channel. When the viscosity is too low, the coating is prone to "sagging" on the back of the blade, resulting in uneven coating thickness.

[0004] (2) Most of the existing dipping equipment uses a robotic arm to immerse the impeller directly into the paint tank, relying on the paint's own fluidity and gravity to complete the coating. Under the action of gravity and surface tension, the paint is prone to form liquid accumulation or insufficient coverage in "hidden areas" such as the back of the blade and deep in the flow channel, requiring manual re-coating, which not only increases costs but also easily causes secondary defects due to uneven re-coating.

[0005] Therefore, there is a need for a pump impeller dipping equipment that can not only achieve uniform and comprehensive coating on the impeller surface, but also automatically sense the viscosity of the coating and adjust it in real time, so as to specifically solve the above technical defects. Summary of the Invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a dipping coating equipment for a pump body impeller, which realizes real-time monitoring and automatic dilution of the viscosity of the dipping liquid, drives the air pressure signal by the resistance change of the detection plate, accurately controls the injection of the diluent, improves the consistency of the coating, and reversely activates the negative pressure generated by the air pump to ensure that the coating evenly covers the complex impeller flow channel and reduces dead corners. The integrated and modular design makes the equipment compact and easy to maintain, effectively reduces operating costs, and significantly improves product quality and production efficiency.

[0007] The technical solution adopted by the present invention is as follows: a pump impeller dipping device, comprising a base, a sealing plate fixedly arranged on the upper wall of the base, an inner cylinder detachably arranged on the upper side of the sealing plate, and an outer cylinder vertically sliding on the base;

[0008] A mounting bracket is fixedly provided on the upper edge of the inner wall of the outer cylinder, an air pressure release assembly is fixedly provided on the upper wall of the mounting bracket, a detection and dilution assembly is fixedly provided on the lower wall of the mounting bracket, and the air pressure release assembly is connected to the air passage of the detection and dilution assembly;

[0009] The air pressure release assembly includes an air pressure cylinder fixedly mounted on the upper wall of the mounting frame, an L-shaped baffle plate 1 that is horizontally slidably mounted on the side wall of the air pressure cylinder, and an air hole 2 that is opened through the mounting frame and corresponds to the L-shaped baffle plate 1;

[0010] As an optimal technical solution of this scheme, the detection dilution component includes a pressure cylinder 2 fixedly arranged on the lower wall of the mounting frame, a piston rod 2 movably and tightly arranged in the pressure cylinder 2, a sealing piston fixedly provided at the lower end of the piston rod 2, the sealing piston movably and tightly arranged in the outer cylinder, a pressure cylinder 3 fixedly provided on the upper wall of the sealing piston, a piston rod 3 movably and tightly provided in the pressure cylinder 3, the piston rod 3 vertically slides through the sealing piston, a vent hole is provided on the top wall of the pressure cylinder 3, and a switch is fixedly provided on the top inner wall of the pressure cylinder 3.

[0011] As a preferred technical solution of this scheme, the air pressure release assembly also includes an air pressure cylinder 1 vertically fixed on the side wall of the air pressure cylinder, a piston rod 1 movably and tightly arranged in the air pressure cylinder 1, and an L-shaped baffle 2 is fixed on the lower end of the piston rod, and the L-shaped baffle 2 corresponds to the L-shaped baffle 1. A pressure relief valve is connected between the air pressure cylinder and the lower edge of the side wall of the air pressure cylinder 1.

[0012] As a preferred technical solution of this scheme, a liquid storage tank is fixedly provided on the upper wall of the base, a water pump is fixedly provided on the top wall of the liquid storage tank, and the water pump is through-connected with the liquid storage tank and the inner cylinder.

[0013] As a preferred technical solution of this solution, the water pump is electrically controlled and connected to the switch.

[0014] After adopting the above structure, the beneficial effects of the present invention are as follows:

[0015] (1) It can realize real-time monitoring of the viscosity of the dipping liquid and automatic dilution compensation. It detects the change in resistance when the detection plate contacts the liquid surface, transmits the force to the air cylinder three through the piston rod three and converts it into an air pressure signal, drives the starting piston to trigger the switch, thereby starting the water pump and the solenoid valve to inject the diluent. This mechanism can control the viscosity fluctuation within a certain range, improves the efficiency compared with manual intervention, and improves the consistency of coating thickness, effectively overcoming the problem of coating quality fluctuation caused by manual detection lag and untimely dilution;

[0016] (2) By reversely activating the air pump to reduce the air pressure in the air cylinder and the inner cylinder, the negative pressure is used to assist the coating liquid in forming a uniform film on the impeller surface. In the narrow flow channel area, the negative pressure can assist the coating to penetrate and fill, thereby improving the coating coverage inside the impeller flow channel, significantly reducing the dead angle problem caused by insufficient coating fluidity, improving the product qualification rate, and improving the problem of incomplete coating on complex structural parts caused by traditional dip coating;

[0017] (3) An integrated structural design is adopted to integrate functions such as air pressure detection, viscosity detection, and dilution compensation into the mounting frame. The components can work together through modular design. At the same time, structures such as one-way valves are used to prevent paint from flowing back and contaminating the air path. The core functions are achieved only by starting the air pump in the forward and reverse directions: when starting in the forward direction, the gas drives the components to move, and viscosity detection and automatic dilution are completed simultaneously; when starting in the reverse direction, the air pressure is reduced, and negative pressure is used to assist the paint to adhere evenly. This design reduces space occupation, shortens maintenance time, and extends life. It solves the problems of dispersed structure and complex maintenance of traditional equipment and reduces operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention.

[0019] Figure 1 This is a schematic diagram of the overall structure of a pump impeller dipping device proposed by the present invention;

[0020] Figure 2 This is a cross-sectional view of the connection structure of the inner cylinder proposed by the present invention;

[0021] Figure 3 for Figure 2 A magnified view of the local structure of part A;

[0022] Figure 4 This is a schematic diagram of the connection structure of the air pressure release assembly proposed in the present invention;

[0023] Figure 5 This is a cross-sectional view of the connection structure of the detection and dilution component in Example 1;

[0024] Figure 6 This is a structural diagram of the positions of the L-shaped baffle 2 and the L-shaped baffle 1 when the inside of the pneumatic cylinder is under negative pressure after the air pump is reversely activated;

[0025] Figure 7 This is a cross-sectional view of the connection structure of the detection and dilution component in Example 2.

[0026] In the accompanying drawings: 1. Base; 2. Sealing plate; 3. Inner tube; 4. Outer tube; 5. Mounting bracket; 6. Air pump; 7. Air pressure release assembly; 8. Detection and dilution assembly; 9. Hydraulic column; 10. One-way valve; 11. Air hole one; 12. Support column; 13. Solenoid valve; 14. Liquid storage tank; 15. Water pump; 16. Air hole two; 17. L-shaped baffle one; 18. L-shaped baffle two; 19. Piston rod one; 20. Pressure relief valve; 21. Air cylinder one; 22. Air cylinder; 23. Piston rod two; 24. Sealing piston; 25. Air cylinder three; 26. Piston rod three; 27. Detection plate; 28. Starting piston; 29. ​​Detection cylinder; 30. Switch; 31. Connecting pipe; 32. Air cylinder two; 33. Vent. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Example 1: Figures 1-6 As shown, a pump impeller dipping device includes a base 1, a support column 12 vertically fixedly mounted on the upper wall of the base 1, a sealing plate 2 fixedly mounted on the upper end of the support column 12, an inner cylinder 3 detachably mounted on the upper side of the sealing plate 2, a hydraulic column 9 vertically fixedly mounted on the upper wall of the base 1, and an outer cylinder 4 fixedly mounted on the upper end of the hydraulic column 9;

[0030] A mounting bracket 5 is fixedly provided on the upper inner wall of the outer tube 4, an air pressure release assembly 7 is fixedly provided on the upper wall of the mounting bracket 5, and a detection dilution assembly 8 is fixedly provided on the lower wall of the mounting bracket 5. The air pressure release assembly 7 is connected to the detection dilution assembly 8 through an airway.

[0031] The air pressure release assembly 7 includes an air cylinder 22 fixedly mounted on the upper wall of the mounting frame 5, and an L-shaped baffle 17 that is horizontally slidably mounted on the side wall of the air cylinder 22. An air hole 16 is penetrated through the mounting frame 5, and the air hole 16 corresponds to the L-shaped baffle 17.

[0032] The air pressure release assembly 7 also includes an air pressure cylinder 21 vertically fixed on the side wall of the air pressure cylinder 22, and a piston rod 19 movably and tightly arranged in the air pressure cylinder 21. The lower end of the piston rod 19 passes through and extends out of the bottom wall of the air pressure cylinder 21. The lower end of the piston rod 19 is fixed with an L-shaped baffle 18, and the L-shaped baffle 18 corresponds to the L-shaped baffle 17. A pressure relief valve 20 is connected between the air pressure cylinder 22 and the lower edge of the side wall of the air pressure cylinder 21.

[0033] The detection dilution assembly 8 includes an air pressure cylinder 2 32 fixedly arranged on the lower wall of the mounting frame 5, a piston rod 23 movably and tightly arranged in the air pressure cylinder 2 32, the lower end of the piston rod 23 penetrates and extends out of the bottom wall of the air pressure cylinder 2 32, the lower end of the piston rod 23 is fixed with a sealing piston 24, the sealing piston 24 is movably and tightly arranged in the outer cylinder 4, an air pressure cylinder 3 25 is fixed on the upper wall of the sealing piston 24, a piston rod 3 26 is movably and tightly arranged in the air pressure cylinder 3 25, the piston rod 3 26 vertically slides through the sealing piston 24, a detection plate 27 is fixed on the lower end of the piston rod 3 26, a detection cylinder 29 is fixed on the upper wall of the sealing piston 24, a connecting pipe 31 is fixedly provided on the upper wall of the detection cylinder 29, one end of the connecting pipe 31 is connected with the air pressure cylinder 3 25, and the other end of the connecting pipe 31 is located at the bottom of the detection cylinder 29. A starting piston 28 is movably and tightly arranged in the detection cylinder 29, and the connecting pipe 31 penetrates the starting piston 28.

[0034] A switch 30 is fixedly provided on the top wall of the detection cylinder 29 , and the switch 30 corresponds to the starting piston 28 .

[0035] The sealing piston 24 is provided with an air hole 11 therethrough. A one-way valve 10 is fixedly provided on the upper wall of the sealing piston 24 . The one-way valve 10 is in continuous communication with the air hole 11 .

[0036] Air outlets are provided on the upper wall of the air pressure cylinder 1 21 , the lower wall of the air pressure cylinder 2 32 , the upper wall of the detection cylinder 29 and the lower side of the side wall of the air pressure cylinder 3 25 .

[0037] A liquid storage tank 14 is fixedly provided on the upper wall of the base 1 , and a water pump 15 is fixedly provided on the top wall of the liquid storage tank 14 . The water suction end of the water pump 15 is connected to the liquid storage tank 14 , and the water outlet end of the water pump 15 is connected to the solenoid valve 13 , and the solenoid valve 13 is connected to the inner tube 3 .

[0038] The solenoid valve 13 and the water pump 15 are electrically controlled and connected to the switch 30. When the switch 30 is turned on, the solenoid valve 13 and the water pump 15 are turned on synchronously. When the switch 30 is turned off, the solenoid valve 13 and the water pump 15 are turned off synchronously.

[0039] An air pump 6 is fixedly provided on the upper wall of the mounting frame 5 , and the air pump 6 is connected to the inside of the pneumatic cylinder 22 .

[0040] A valve is provided on the piston plate of the piston rod 19.

[0041] When in use, first start the hydraulic column 9 to drive the outer cylinder 4 upwards, placing the pump impeller into the inner cylinder 3, and then start the hydraulic column 9 again to move the outer cylinder 4 downwards until its lower edge contacts the sealing plate 2;

[0042] In the initial state, the positions of the L-shaped baffle 17 and the L-shaped baffle 2 18 are as follows: Figure 4 As shown, the air pump 6 is started, and the external gas enters the pneumatic cylinder 22, and the internal air pressure gradually increases. When the air pressure reaches the set value, the gas enters the pneumatic cylinder 1 21 through the pressure relief valve 20, and pushes the piston rod 19 to move upward, driving the L-shaped baffle 18 to move upward. When the L-shaped baffle 18 is separated from the L-shaped baffle 17, the high-pressure gas in the pneumatic cylinder 22 pushes the L-shaped baffle 17 out, releasing the blockage of the air hole 16, and the high-pressure gas immediately enters the pneumatic cylinder 2 32, causing the piston rod 23 and the sealing piston 24 to instantly bounce down. During the downward movement of the sealing piston 24, the gas in the outer cylinder 4 and the inner cylinder 3 is discharged through the air hole 11 and the one-way valve 10.

[0043] When the sealing piston 24 and the detection plate 27 move downward, the detection plate 27 first contacts the liquid surface of the dipping liquid. At this time, the detection plate 27 is affected by the resistance of the dipping liquid, and the detection plate 27 drives the piston rod 3 26 to move upward, pressing the gas in the air pressure cylinder 3 25 into the detection cylinder 29. If the viscosity of the dipping liquid exceeds the standard, the starting piston 28 moves upward a large distance, the starting piston 28 will trigger the switch 30, and then start the water pump 15 and the solenoid valve 13 to open synchronously, and the diluent in the liquid storage tank 14 is pumped into the inner cylinder 3 to dilute the dipping liquid and make the viscosity of the dipping liquid meet the standard. On the contrary, if the viscosity of the dipping liquid is qualified, the starting piston 28 moves upward a small distance, the switch 30 is not triggered, and the diluent will not be injected into the inner cylinder 3.

[0044] After the above operation is completed, open the valve and push the L-shaped baffle plate 2 18 downward, then close the valve and activate the air pump 6 in reverse. At this time, the L-shaped baffle plate 2 18 is blocked by the L-shaped baffle plate 1 17 (as shown in FIG. Figure 6 As shown), the air pressure in the pneumatic cylinder 22 and the inner tube 3 gradually decreases, and the negative pressure is used to make the dipping liquid evenly cover the pump body impeller;

[0045] After the dipping process is completed, the hydraulic column 9 is started to move the outer cylinder 4 upward and the pump impeller is taken out.

[0046] Example 2, as Figure 7 As shown, the difference between this embodiment and the aforementioned embodiment 1 is that a switch 30 is fixedly provided on the inner top wall of the air pressure cylinder 3 25 , the switch 30 corresponds to the piston rod 3 26 , and a vent hole 33 is opened through the top wall of the air pressure cylinder 3 25 .

[0047] When this embodiment is used in practice, the overall method is the same as that of the first embodiment, with the only difference being that after the detection plate 27 contacts the liquid surface of the dipping liquid, the detection plate 27 drives the piston rod 3 26 to move upward. If the viscosity of the dipping liquid exceeds the standard, the piston rod 3 26 moves upward a large distance, and the piston rod 3 26 will trigger the switch 30.

[0048] The present invention and its embodiments are described above. Such description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto.

Claims

1. A pump impeller dipping device, comprising a base (1), a sealing plate (2) fixedly arranged on the upper end of the base (1), an inner cylinder (3) detachably arranged on the upper side of the sealing plate (2), and an outer cylinder (4) vertically raised and lowered on the upper wall of the base (1), characterized in that: A mounting frame (5) is fixedly provided on the upper edge of the inner wall of the outer cylinder (4), an air pressure release component (7) is fixedly provided on the upper wall of the mounting frame (5), a detection dilution component (8) is fixedly provided on the lower wall of the mounting frame (5), and the air pressure release component (7) is connected to the airway of the detection dilution component (8); The air pressure release assembly (7) includes an air cylinder (22) fixedly mounted on the upper wall of the mounting frame (5), an L-shaped baffle (17) penetratingly and horizontally slidably mounted on the side wall of the air cylinder (22), an air hole (16) penetratingly opened in the mounting frame (5), the air hole (16) corresponding to the L-shaped baffle (17), an air pump (6) fixedly mounted on the upper wall of the mounting frame (5), and the air pump (6) is connected to the inside of the air cylinder (22); The detection dilution assembly (8) includes a second air pressure cylinder (32) fixedly mounted on the lower wall of the mounting frame (5), a second piston rod (23) movably and tightly mounted in the second air pressure cylinder (32), and a sealing piston (24) fixedly mounted at the lower end of the second piston rod (23); The sealing piston (24) is movably and tightly arranged in the outer cylinder (4), and a pressure cylinder three (25) is fixedly provided on the upper wall of the sealing piston (24). A piston rod three (26) is movably and tightly arranged in the pressure cylinder three (25). The piston rod three (26) vertically slides through the sealing piston (24), and a detection plate (27) is fixedly provided at the lower end of the piston rod three (26). A vent hole (33) is provided on the top wall of the pressure cylinder three (25), and a switch (30) is fixedly provided on the top inner wall of the pressure cylinder three (25); The air pressure release assembly (7) further includes an air pressure cylinder (21) vertically fixedly arranged on the side wall of the air pressure cylinder (22), a piston rod (19) movably and tightly arranged in the air pressure cylinder (21), a valve is provided on the piston plate of the piston rod (19), an L-shaped baffle (18) is fixedly provided at the lower end of the piston rod (19), the L-shaped baffle (18) corresponds to the L-shaped baffle (17), and a pressure relief valve (20) is connected between the air pressure cylinder (22) and the lower edge of the side wall of the air pressure cylinder (21); A liquid storage tank (14) is fixedly provided on the upper wall of the base (1), a water pump (15) is fixedly provided on the top wall of the liquid storage tank (14), and the water pump (15) is connected to the liquid storage tank (14) and the inner cylinder (3).

2. The dipping equipment for pump impeller according to claim 1, characterized in that: The water pump (15) is electrically controlled connected to the switch (30).

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