Gas-liquid mixing pump impeller corrosion testing device and testing method

Abstract

The invention discloses a gas-liquid mixing pump impeller corrosion testing device and testing method, and relates to the field of testing devices. A gas-liquid mixing pump impeller corrosion testing device comprises an operation table, a first servo motor and a volute are fixedly connected to the operation table, an impeller body is installed at the output end of the first servo motor, the volute is connected with an upper cover through threads, the upper cover is rotationally connected with a connecting pipe, and the volute is communicated with a water outlet pipe; the supporting table is fixedly connected with two connecting sleeve shells, and sliding blocking blocks and sliding baffles are slidably connected into the connecting sleeve shells correspondingly. A first pipeline, a second pipeline, a water inlet pipe, an inner water outlet pipe and a second water distribution pipe are respectively communicated with the connecting sleeve shell, and a first water distribution pipe is communicated with the water outlet pipe; the second water distribution pipe is fixedly connected with a turbine flow detector; under the condition that the impeller body is not disassembled, corrosion testing and detection judgment can be completed, and operation of workers is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of testing devices, and in particular relates to a corrosion testing device for an impeller of a gas-liquid mixing pump. Background Art

[0002] With the advancement of science and technology and the development of industry, the traditional single fluid delivery pump can no longer meet the gas-liquid mixing needs in complex process. Therefore, the gas-liquid mixing pump came into being. It combines the delivery characteristics of gas and liquid, and realizes the synchronous suction, mixing and pressurized output of gas and liquid through specially designed impeller and pump body structure. The gas-liquid mixing pump is particularly widely used in environmental protection, chemical industry, electric power and other industries. It can not only improve the efficiency of the preparation of dissolved gas and liquid, but also simplify the preparation device, saving site and operating costs. In addition, with the continuous research and development and application of high-performance materials such as high temperature resistance and corrosion resistance, the performance and application scope of the gas-liquid mixing pump have also been further improved and expanded.

[0003] However, due to the different application scenarios of the gas-liquid mixing pump, the impeller, as the core component of the gas-liquid mixing pump, will be in contact with the fluid medium for a long time. These media may contain acid and alkali substances, impurities and corrosive gases. Therefore, in order to ensure the safe and efficient operation of the gas-liquid mixing pump, the corrosion resistance of the impeller must be tested. In order to understand the corrosion resistance of the impeller in different media, however, the existing testing methods often need to simulate the working environment of the impeller first, and then observe it with the naked eye, or install the impeller in a specific detection device for performance testing. This process requires the impeller to be disassembled, transported and installed many times, which is very troublesome. Based on this, the present invention is proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a gas-liquid mixing pump impeller corrosion testing device that can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a gas-liquid mixing pump impeller corrosion testing device, including an operating table, on which a first servo motor and a volute are respectively fixedly connected, and the output end of the first servo motor is rotatably connected to the volute, and also includes: the output end of the first servo motor is installed with an impeller body, the volute is connected with an upper cover by a thread, the upper cover is rotatably connected with a connecting pipe, and the volute is connected with a water outlet pipe; a plurality of support columns are fixedly connected to the operating table, the support columns are fixedly connected with a support table, and two connecting sleeves are fixedly connected to the support table, and a sliding block and a sliding baffle are respectively slidably connected in the connecting sleeve; the connecting sleeve with the sliding block sliding inside is respectively connected with a first pipeline, a second pipeline and a water inlet pipe, and the connecting sleeve with the sliding baffle sliding inside is respectively connected with a There are a water outlet pipe and a second water distribution pipe, and the water outlet pipe is connected to the first water distribution pipe; the second water distribution pipe is fixedly connected to a turbine flow detector, the other end of the second water distribution pipe is connected to a clean water tank, and the other end of the first water distribution pipe is connected to a reagent tank, the first pipe is connected to the clean water tank, and the second pipe is connected to the reagent tank; the sliding block is used to control the connection state between the first pipe, the second pipe and the water inlet pipe, and the sliding baffle is used to control the connection state between the water outlet pipe and the second water distribution pipe; when the second pipe is connected to the water inlet pipe, the first pipe is in a closed state, and the water outlet pipe is disconnected from the second water distribution pipe, the reagent tank forms a complete water circuit, and when the first pipe is connected to the water inlet pipe, the second pipe is in a closed state, and the water outlet pipe is connected to the second water distribution pipe, the clean water tank forms a complete water circuit.

[0006] Preferably, the sliding block includes a first block, a second block, a third block and a fourth block, and the sliding baffle includes a first baffle, a second baffle, a third baffle and a fourth baffle, and the first block, the second block, the third block and the fourth block correspond to the positions of the first baffle, the second baffle, the third baffle and the fourth baffle respectively.

[0007] Preferably, the bottom of the connecting shell in which the sliding block slides is connected with a hose, and a collecting tank is provided below the reagent box, and the hose is used to extract the liquid in the collecting tank.

[0008] Preferably, the reagent box and the clean water tank are connected with air holes, and the reagent box and the clean water tank are both connected with drainage pipes below.

[0009] Preferably, a first sliding groove is provided on the operating table, a support block is slidably connected to the first sliding groove, the support block is fixedly connected to a connecting pipe, a connecting sleeve is rotatably connected to the connecting pipe, and the connecting sleeve is connected to the water inlet pipe through a thread.

[0010] Preferably, a second servo motor is fixedly connected to the operating table, an output end of the second servo motor is fixedly connected to a lifting threaded rod, and the lifting threaded rod is threadedly connected to a sliding block.

[0011] Furthermore, a second sliding groove is provided on the support platform, the sliding block is slidably connected to the second sliding groove, a connecting rod is fixedly connected below the sliding block, and the connecting rod is fixedly connected to the sliding block and the sliding baffle respectively.

[0012] Furthermore, a cover plate is slidably connected to the connecting rod, a third sliding groove is provided on the supporting platform, and an extrusion block is slidably connected to the third sliding groove.

[0013] Furthermore, a bidirectional threaded rod is rotatably connected to the connecting sleeve, and the bidirectional threaded rod is connected to the extrusion block through threads. When the extrusion block performs a relatively approaching movement, the extrusion block extrusion cover plate contacts the connecting sleeve.

[0014] A testing method for a gas-liquid mixing pump impeller corrosion testing device mainly comprises the following steps: S1. Fix the impeller body on the output shaft of the first servo motor and connect the connecting pipe; S2, start the second servo motor to make the first pipeline and the second water distribution pipe connected, and start the first servo motor to pump out the water in the clean water tank and detect the liquid flow through the turbine flow detector; S3, starting the second servo motor so that the second pipeline is in a connected state, the second water distribution pipe is in a disconnected state, and starting the first servo motor to simulate the working environment of the impeller body; S4. Open the drain pipe under the reagent box to discharge the reagent into the collection tank; S5, starting the second servo motor to make the first pipeline and the second water distribution pipe connected, and starting the first servo motor to detect the liquid flow at the turbine flow detector again; S6. Determine whether the impeller body is damaged by comparing the flow detection data on the front and rear sides.

[0015] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention switches the positions of the sliding block and the sliding baffle, thereby completing the corrosion test and the detection and judgment after the test without disassembling the impeller body, which greatly facilitates the operation of the staff.

[0016] The present invention can comprehensively judge the damage condition of the impeller body by detecting the liquid flow and gas flow driven by the impeller body. Compared with single detection data, the final result is more accurate.

[0017] The present invention can replace the sliding block and the sliding baffle, thereby preventing the sliding block and the sliding baffle from being corroded and leaked due to long-term flushing of reagents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the attached picture: Figure 1 A schematic diagram of the three-dimensional structure of a gas-liquid mixing pump impeller corrosion test device proposed by the present invention; Figure 2 A gas-liquid mixing pump impeller corrosion test device proposed by the present invention Figure 1 The structural diagram at A in the middle; Figure 3 A schematic diagram of the vertical pipeline structure of a gas-liquid mixing pump impeller corrosion test device proposed by the present invention; Figure 4 A cross-sectional view of the structure of the connecting casing portion in a gas-liquid mixing pump impeller corrosion testing device proposed by the present invention; Figure 5 A gas-liquid mixing pump impeller corrosion test device proposed by the present invention Figure 4 The structural diagram at B in the middle; Figure 6 This is a schematic structural diagram of a connecting pipe portion in a gas-liquid mixing pump impeller corrosion testing device proposed by the present invention; Figure 7 This is a schematic structural diagram of a sliding baffle in a gas-liquid mixing pump impeller corrosion testing device proposed by the present invention; Figure 8 The present invention provides a schematic structural diagram of a sliding block in a gas-liquid mixing pump impeller corrosion testing device.

[0019] In the figure: 1, operating table; 11, support column; 12, support table; 2, first servo motor; 21, volute; 22, impeller body; 221, fixing bolt; 23, upper cover; 3, connecting pipe; 31, supporting block; 311, first sliding groove; 32, connecting sleeve; 41, first pipeline; 42, second pipeline; 43, water inlet pipe; 44, water outlet pipe; 45, first water distribution pipe; 46, second water distribution pipe; 5, second servo motor; 51, lifting threaded rod; 52, sliding block; 521, second sliding groove; 522, Connecting rod; 53, connecting sleeve; 54, extrusion block; 541, third sliding groove; 55, bidirectional threaded rod; 56, cover plate; 57, sliding block; 571, first block; 572, second block; 573, third block; 574, fourth block; 58, sliding baffle; 581, first baffle; 582, second baffle; 583, third baffle; 584, fourth baffle; 6, reagent box; 61, collecting tank; 62, hose; 63, air hole; 7, clean water tank; 8, drain pipe; 9, turbine flow detector. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0021] Example 1: Reference Figure 1-Figure 8 , a gas-liquid mixing pump impeller corrosion test device, comprising an operating table 1, on which a first servo motor 2 and a volute 21 are fixedly connected, respectively, and the output end of the first servo motor 2 is rotatably connected to the volute 21, and further comprising: an impeller body 22 is installed at the output end of the first servo motor 2, the output shaft of the first servo motor 2 is threadedly connected with a fixing bolt 221, the volute 21 is threadedly connected with an upper cover 23, the upper cover 23 is rotatably connected with a connecting pipe 3, and the volute 21 is connected with a water outlet pipe 44; a plurality of support columns 11 are fixedly connected to the operating table 1, a support platform 12 is fixedly connected to the support column 11, two connecting shells 53 are fixedly connected to the support platform 12, and a sliding block 57 and a sliding baffle 58 are slidably connected in the connecting shell 53; the connecting shell 53 with the sliding block 57 sliding inside is respectively connected with the first pipeline 41, the second pipeline 42 and the water inlet pipe 43, and the connecting shell 53 with the sliding baffle 58 sliding inside is respectively connected with the water outlet pipe 44 and the second water distribution pipe 4 6, the water outlet pipe 44 is connected to the first water distribution pipe 45; the second water distribution pipe 46 is fixedly connected to the turbine flow detector 9, the other end of the second water distribution pipe 46 is connected to the clean water tank 7, the other end of the first water distribution pipe 45 is connected to the reagent tank 6, the first pipeline 41 is connected to the clean water tank 7, and the second pipeline 42 is connected to the reagent tank 6; the sliding block 57 is used to control the connection state between the first pipeline 41, the second pipeline 42 and the water inlet pipe 43, and the sliding baffle 58 is used to control the connection state between the water outlet pipe 44 and the first pipeline 42. The connectivity between the two water pipes 46; the bottom of the connecting shell 53 with a sliding block 57 sliding inside is connected to a hose 62. When the second pipe 42 is connected to the water inlet pipe 43, the first pipe 41 is in a closed state, and the water outlet pipe 44 is disconnected from the second water pipe 46, the reagent tank 6 forms a complete water circuit. When the first pipe 41 is connected to the water inlet pipe 43, the second pipe 42 is in a closed state, and the water outlet pipe 44 is connected to the second water pipe 46, the clean water tank 7 forms a complete water circuit.

[0022] In the present invention, multiple effects can be achieved by controlling the connection and disconnection states between multiple pipes, so that a corrosion working environment can be created for the impeller body 22 without disassembling the impeller body 22, and the corrosion of the impeller body 22 can be detected, so that the impeller body 22 does not need to be disassembled and replaced back and forth between the test device and the detection device, which greatly facilitates the operation of the staff. The specific connection of the pipes has the following effects: Simulating the working environment: when the second pipe 42 is connected to the water inlet pipe 43, and the water outlet pipe 44 and the second water branch pipe 46 are cut off, when the impeller body 22 rotates, the second pipe 42 extracts the corrosive reagent, and the reagent flows back to the inside of the reagent box 6 through the water inlet pipe 43, the connecting pipe 3, the volute 21, the water outlet pipe 44, and the first water branch pipe 45, thereby forming a complete water circuit, thereby simulating the working environment of the impeller body 22 when working, so that the final data is closer to the actual situation. It should be noted that the second pipe 42 needs to extend to the bottom of the reagent box 6, and the level of the reagent solution in the reagent box 6 cannot be higher than the height of the connection point between the first water branch pipe 45 and the reagent box 6, so that the entire water circuit cycle will not be blocked by the reagent during operation; Clean water flow rate detection: When the first pipe 41 is connected with the water inlet pipe 43, and the water outlet pipe 44 is connected with the second water branch pipe 46, when the impeller body 22 rotates, the first pipe 41 draws out the clean water in the clean water tank 7, and the clean water flows back to the inside of the clean water tank 7 through the water inlet pipe 43, the connecting pipe 3, the volute 21, the water outlet pipe 44, and the second water branch pipe 46. At this time, the water flow in the second water branch pipe 46 can be detected by the turbine flow detector 9, wherein the first pipe 41 also extends to the bottom of the reagent box 6, and the connection point of the second water branch pipe 46 and the clean water tank 7 also needs to be higher than the liquid level of the internal clean water, and the connection position of the first water branch pipe 45 and the water outlet pipe 44 is above the water outlet pipe 44. This method can prevent clean water from flowing into the first water branch pipe 45 when the second pipe 42 is disconnected; Gas flow rate detection: when the first pipe 41 and the second pipe 42 are both in a disconnected state, the water inlet pipe 43 is connected to the outside, the second water distribution pipe 46 is in a connected state and the clean water tank 7 is connected to the outside, when the impeller body 22 rotates, the outside air will be drawn in from the water inlet pipe 43 and discharged to the outside through the water inlet pipe 43, the connecting pipe 3, the volute 21, the water outlet pipe 44, the second water distribution pipe 46 and the clean water tank 7, and the turbine flow detector 9 can detect the flow rate of the airflow in the second water distribution pipe 46; Reagent extraction: When the first pipe 41 and the second pipe 42 are both in a disconnected state, and the second water distribution pipe 46 is also in a disconnected state, the hose 62 is connected to the water inlet pipe 43, and the reagent box 6 is connected to the outside, when the impeller body 22 rotates, the hose 62 can draw the corrosive reagent from the outside into the reagent box 6; By comparing the stability and values ​​of the flow data of clean water and gas detected by the turbine flow detector 9 before and after the experiment, the corrosion condition of the worm gear can be roughly judged. Compared with the traditional observation by naked eye, this method can judge whether the impeller body 22 is deformed during the corrosion process. At the same time, by replacing the circulating water circuit, it can avoid the situation where the turbine flow detector 9 is corroded by the reagent and causes errors in the detection data.

[0023] Example 2: Reference Figure 1-Figure 8 , a gas-liquid mixing pump impeller corrosion testing device, which is basically the same as Example 1, and further: the sliding block 57 includes a first block 571, a second block 572, a third block 573 and a fourth block 574, and the sliding baffle 58 includes a first baffle 581, a second baffle 582, a third baffle 583 and a fourth baffle 584, the first block 571, the second block 572, the third block 573 and the fourth baffle 584 respectively correspond to the positions of the first baffle 581, the second baffle 582, the third baffle 583 and the fourth baffle 584, a collecting tank 61 is provided below the reagent box 6, and a hose 62 is used to extract liquid in the collecting tank 61, the reagent box 6 and the clean water tank 7 are both connected with air holes 63, and the reagent box 6 and the clean water tank 7 are both connected with a drain pipe 8 below.

[0024] In the present invention, the sliding block 57 and the sliding baffle 58 are divided into four corresponding parts, wherein the second block 572 is provided with a through hole and the thickness of the second block 572 is the same as the space in the connecting sleeve 53, the thickness of the first block 571, the third block 573, and the fourth block 574 are all much smaller than the thickness of the second block 572, the first baffle 581 and the second baffle 582 are provided with a through hole, and the thickness of the first baffle 581, the second baffle 582, the third baffle 583, and the fourth baffle 584 are all the same as the thickness of the second block 572; In the simulated working environment sliding effect, the sliding block 57 moves to Figure 8 When the position shown is reached, the sliding baffle 58 is synchronized to the position shown in FIG. Figure 7 The second baffle 582 blocks the second water distribution pipe 46, and the through hole on the second blocking block 572 connects the second pipe 42 and the water outlet pipe 44. At this time, a complete water circuit is formed between the second pipe 42 and the first water distribution pipe 45; In the clean water flow rate detection effect, the sliding block 57 moves to a position where the first block 571 is flush with the second pipe 42, and the first pipe 41 is connected to the water outlet pipe 44. At this time, the first baffle 581 moves to the water outlet pipe 44, and the through hole on the first baffle 581 connects the water outlet pipe 44 with the second water distribution pipe 46. At this time, a complete water circuit is formed between the first pipe 41 and the second water distribution pipe 46; In the gas flow rate detection effect, the sliding block 57 moves to a position where the third block 573 is flush with the second pipe 42, the first pipe 41 and the second pipe 42 are both blocked, the hose 62 is connected to the water inlet pipe 43, and the through hole on the third baffle 583 connects the water outlet pipe 44 with the second water distribution pipe 46. At this time, the hose 62 is connected to the second water distribution pipe 46, and the hose 62 can be disassembled. If the solenoid valve in the air hole 63 on the clean water tank 7 is opened and the connection between the hose 62 and the connecting shell 53 is disassembled, the connecting shell 53 is connected to the outside world, and the air flow rate that the impeller body 22 can extract can be detected; In the effect of reagent extraction, when the sliding block 57 moves to the position where the fourth block 574 is flush with the second pipe 42, the first pipe 41 and the second pipe 42 are both blocked, the hose 62 is connected to the water inlet pipe 43, and the fourth baffle 584 separates the water outlet pipe 44 from the second water distribution pipe 46. At this time, the hose 62 is connected to the first water distribution pipe 45. If the solenoid valve in the air hole 63 on the reagent box 6 is opened, the reagent can be drawn into the reagent box 6 by placing the hose 62 into the reagent liquid; A solenoid valve is provided in the drain pipe 8 to control the discharge of clean water and reagents. A solenoid valve is also provided in the air hole 63. By switching the air hole 63 and the drain pipe 8, it is possible to control whether the box is a closed space, thereby cooperating with the circulating water circuit.

[0025] Example 3: Reference Figure 1-Figure 8 , a gas-liquid mixing pump impeller corrosion testing device, which is basically the same as Example 2, and further: a first sliding groove 311 is opened on the operating table 1, and a support block 31 is slidably connected to the first sliding groove 311, and the support block 31 is fixedly connected to the connecting pipe 3, and a connecting sleeve 32 is rotatably connected to the connecting pipe 3, and the connecting sleeve 32 is connected to the water inlet pipe 43 through a thread, and a second servo motor 5 is fixedly connected to the operating table 1, and a lifting threaded rod 51 is fixedly connected to the output end of the second servo motor 5, and the lifting threaded rod 51 is connected to the sliding block 52 through a thread, and a second sliding groove 521 is opened on the support table 12 The sliding block 52 is slidably connected to the second sliding groove 521, and a connecting rod 522 is fixedly connected below the sliding block 52. The connecting rod 522 is fixedly connected to the sliding block 57 and the sliding baffle 58 respectively. A cover plate 56 is slidably connected to the connecting rod 522. A third sliding groove 541 is provided on the support platform 12, and an extrusion block 54 is slidably connected to the third sliding groove 541. A bidirectional threaded rod 55 is rotatably connected to the connecting sleeve 53. The bidirectional threaded rod 55 is connected to the extrusion block 54 through threads. When the extrusion block 54 moves relatively closer, the extrusion block 54 squeezes the cover plate 56 to contact the connecting sleeve 53.

[0026] In the present invention, when the impeller body 22 needs to be disassembled, the connecting pipe 3 can be disconnected by rotating the upper cover 23 and the connecting sleeve 32, and the connecting pipe 3 can be taken out from the first sliding groove 311 by sliding the supporting block 31, and then the impeller body 22 can be conveniently taken out by the user; The second servo motor 5 can drive the sliding block 52 to rise and move down, and the sliding block 52 drives the sliding block 57 and the sliding baffle 58 to move synchronously. At the same time, when the sliding block 52 rises to the highest point, it will be separated from the lifting threaded rod 51, and the user can take out the sliding block 52 from the second sliding groove 521, and at the same time, the sliding block 57, the sliding baffle 58 and the cover plate 56 will be taken out together for replacement, thereby avoiding the long-term erosion of the sliding block 57 and the sliding baffle 58 by the reagents in the circulating water circuit and causing leakage. It should be noted that after replacement, the new sliding block 52 needs to be repositioned before it can be used; After positioning the sliding block 52 , the user can cover the cover plate 56 onto the connecting sleeve 53 , and rotate the bidirectional threaded rod 55 to drive the extrusion block 54 to move relatively forward, so that the extrusion block 54 can fit tightly with the connecting sleeve 53 through the inclined extrusion cover plate 56 .

[0027] Example 4: Reference Figure 1-Figure 8 A method for using a gas-liquid mixing pump impeller corrosion test device mainly comprises the following steps: S1. Install the impeller body 22 to be subjected to corrosion test on the output shaft of the first servo motor 2, and install the fixing bolts 221, and then connect the connecting pipe 3 with the volute 21 and the water inlet pipe 43; S2, start the second servo motor 5 to drive the sliding block 57 and the sliding baffle 58 to move to the two effect states of clean water flow rate detection and gas flow detection respectively, and record the flow rate value when the impeller body 22 is in an intact state; S3, starting the second servo motor 5 to drive the sliding block 57 and the sliding baffle 58 to move to a state of a simulated working environment, and performing a corrosion simulation test on the impeller body 22; S4, opening the drain pipe 8 and the air hole 63 on the reagent box 6 to discharge the reagent into the collecting tank 61, so that no reagent is retained in the pipe; S5, start the second servo motor 5 again to drive the sliding block 57 and the sliding baffle 58 to move to the two effect states of clean water flow rate detection and gas flow detection respectively, and record the data; S6. Determine the corrosion condition of the impeller body 22 by comparing the changes in the data before and after.

[0028] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the present invention can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A gas-liquid mixing pump impeller corrosion testing device, comprising an operating table (1), to which a first servo motor (2) and a volute (21) are respectively fixedly connected, and an output end of the first servo motor (2) is rotatably connected to the volute (21), characterized in that: Also includes: An impeller body (22) is installed at the output end of the first servo motor (2); the volute (21) is connected to an upper cover (23) via a thread; the upper cover (23) is rotatably connected to a connecting pipe (3); and the volute (21) is connected to a water outlet pipe (44); The operating table (1) is fixedly connected to a plurality of support columns (11), the support columns (11) are fixedly connected to a support platform (12), the support platform (12) is fixedly connected to two connecting sleeves (53), and the connecting sleeves (53) are slidably connected to a sliding block (57) and a sliding baffle (58) respectively; The connecting casing (53) in which the sliding block (57) slides is connected to the first pipe (41), the second pipe (42) and the water inlet pipe (43), respectively; the connecting casing (53) in which the sliding baffle (58) slides is connected to the water outlet pipe (44) and the second water distribution pipe (46), respectively; the water outlet pipe (44) is connected to the first water distribution pipe (45); The second water distribution pipe (46) is fixedly connected to a turbine flow detector (9); the other end of the second water distribution pipe (46) is connected to a clean water tank (7); the other end of the first water distribution pipe (45) is connected to a reagent tank (6); the first pipeline (41) is connected to the clean water tank (7); and the second pipeline (42) is connected to the reagent tank (6); The sliding block (57) is used to control the communication state between the first pipe (41), the second pipe (42) and the water inlet pipe (43), and the sliding baffle (58) is used to control the communication state between the water outlet pipe (44) and the second water distribution pipe (46); When the second pipeline (42) is in communication with the water inlet pipe (43), the first pipeline (41) is in a closed state, and the water outlet pipe (44) is disconnected from the second water branch pipe (46), the reagent tank (6) forms a complete water circuit; when the first pipeline (41) is in communication with the water inlet pipe (43), the second pipeline (42) is in a closed state, and the water outlet pipe (44) is connected to the second water branch pipe (46), the clean water tank (7) forms a complete water circuit.

2. A gas-liquid mixing pump impeller corrosion testing device according to claim 1, characterized in that: The sliding block (57) includes a first block (571), a second block (572), a third block (573) and a fourth block (574); the sliding baffle (58) includes a first baffle (581), a second baffle (582), a third baffle (583) and a fourth baffle (584); the first block (571), the second block (572), the third block (573) and the fourth block (574) respectively correspond to the positions of the first baffle (581), the second baffle (582), the third baffle (583) and the fourth baffle (584).

3. The gas-liquid mixing pump impeller corrosion testing device according to claim 1, characterized in that: The bottom of the connecting shell (53) in which the sliding block (57) slides is connected to a hose (62). A collecting tank (61) is provided below the reagent box (6). The hose (62) is used to extract liquid from the collecting tank (61).

4. The gas-liquid mixing pump impeller corrosion testing device according to claim 1, characterized in that: The reagent box (6) and the clean water tank (7) are both connected with air holes (63), and the bottoms of the reagent box (6) and the clean water tank (7) are both connected with drainage pipes (8).

5. The gas-liquid mixing pump impeller corrosion testing device according to claim 1, characterized in that: The operating table (1) is provided with a first sliding groove (311), a support block (31) is slidably connected to the first sliding groove (311), the support block (31) is fixedly connected to the connecting pipe (3), a connecting sleeve (32) is rotatably connected to the connecting pipe (3), and the connecting sleeve (32) is connected to the water inlet pipe (43) via a thread.

6. The gas-liquid mixing pump impeller corrosion testing device according to claim 1, characterized in that: A second servo motor (5) is fixedly connected to the operating table (1); an output end of the second servo motor (5) is fixedly connected to a lifting threaded rod (51); and the lifting threaded rod (51) is threadably connected to a sliding block (52).

7. A gas-liquid mixing pump impeller corrosion testing device according to claim 6, characterized in that: The support platform (12) is provided with a second sliding groove (521), the sliding block (52) is slidably connected to the second sliding groove (521), a connecting rod (522) is fixedly connected below the sliding block (52), and the connecting rod (522) is fixedly connected to the sliding block (57) and the sliding baffle (58), respectively.

8. The gas-liquid mixing pump impeller corrosion testing device according to claim 7, characterized in that: A cover plate (56) is slidably connected to the connecting rod (522), a third sliding groove (541) is provided on the support platform (12), and an extrusion block (54) is slidably connected to the third sliding groove (541).

9. The gas-liquid mixing pump impeller corrosion testing device according to claim 8, characterized in that: A bidirectional threaded rod (55) is rotatably connected to the connecting sleeve (53), and the bidirectional threaded rod (55) is connected to the extrusion block (54) via threads. When the extrusion block (54) moves relatively closer, the extrusion block (54) squeezes the cover plate (56) into contact with the connecting sleeve (53).

10. A gas-liquid mixing pump impeller corrosion testing method, comprising a gas-liquid mixing pump impeller corrosion testing device according to claim 9, characterized in that: The main steps include: S1. Install and fix the impeller body (22) on the output shaft of the first servo motor (2), and connect the connecting pipe (3); S2, starting the second servo motor (5) so that the first pipeline (41) and the second water distribution pipe (46) are in a connected state, and starting the first servo motor (2) to pump water out of the clean water tank (7) and detect the liquid flow through the turbine flow detector (9); S3, starting the second servo motor (5) so that the second pipeline (42) is in a connected state and the second water distribution pipe (46) is in a disconnected state, and starting the first servo motor (2) to simulate the working environment of the impeller body (22); S4, opening the drain pipe (8) below the reagent box (6) to discharge the reagent into the collection tank (61); S5, starting the second servo motor (5) so that the first pipeline (41) and the second water distribution pipe (46) are in a connected state, and starting the first servo motor (2) to detect the liquid flow at the turbine flow detector (9) again; S6. By comparing the flow rate detection data on the front and rear sides, determine whether the impeller body (22) is damaged.

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