A corrosion resistance experimental device for water supply pressure reducing valve

Abstract

The invention relates to the technical field of mechanical detection, in particular to a corrosion resistance test device for a water supply pressure reducing valve, which can simulate actual working conditions and simultaneously perform corrosion resistance tests on the inside and outside of the water supply pressure reducing valve with high accuracy; the device comprises a control box, a salt water box, a salt spray box, a salt spray generator and a box cover, wherein the salt water box is installed on the control box, the salt spray generator is installed in the salt spray box, and the box cover is rotatably hinged on the salt spray box; the device also comprises a liquid storage box, a circulating water pump, an upper water pipe and a return water pipe, wherein the circulating water pump is installed outside the liquid storage box, the liquid inlet pipe of the circulating water pump extends into the bottom of the liquid storage box, the liquid outlet pipe of the circulating water pump is connected with the input end of the upper water pipe, the output end of the upper water pipe extends into the left part of an experimental chamber of the salt spray box, the input end of the return water pipe extends into the right part of the salt spray box, the output end of the return water pipe extends into the top of the liquid storage box, and a plurality of relative valve installation components are arranged on the output end of the upper water pipe and the input end of the return water pipe.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical detection, in particular to a corrosion resistance test device for a water supply pressure reducing valve. Background Art

[0002] The water supply pressure reducing valve is installed in the water supply pipeline. Some of the water supply pipelines are buried underground and some are erected in the air. High-pressure water flows from the inside of the water supply pipeline. The impact of water and harmful substances in the water will cause corrosion to the inner wall of the water supply pressure reducing valve in the pipeline. At the same time, harmful substances in the external soil and air will cause corrosion to the outer surface of the water supply pressure reducing valve in the pipeline. Therefore, it is necessary to carry out corrosion resistance test on the water supply pressure reducing valve to determine the corrosion resistance of the water supply pressure reducing valve under certain environmental conditions, so as to formulate corresponding maintenance cycle.

[0003] Among the existing corrosion resistance test methods for metal products, the salt spray corrosion test is the most widely used. The salt spray corrosion test is to place the water supply pressure reducing valve in a test box and use artificial methods to create a high concentration of chloride salt spray environment in the test box to assess the salt spray corrosion resistance quality of the water supply pressure reducing valve, and the test results can be obtained quickly.

[0004] However, the internal passage of the water supply pressure reducing valve is tortuous, and the pressure regulating plug, spring and other components inside the water supply pressure reducing valve will block the salt spray. Therefore, when the salt spray test is carried out alone, the high-concentration salt spray cannot fully enter the interior of the water supply pressure reducing valve, and the pressure of the salt spray is very low, which cannot simulate the impact corrosion caused by the high-pressure flowing water on the interior of the water supply pressure reducing valve in actual work, resulting in the experimental results of the interior of the water supply pressure reducing valve being inconsistent with the actual situation. A separate corrosion resistance test on the interior of the water supply pressure reducing valve requires another experimental device, which occupies a large space, is complicated to operate, and is time-consuming to conduct two experiments.

[0005] Therefore, a device is needed to simulate actual working conditions and conduct corrosion resistance tests on the inside and outside of the water supply pressure reducing valve at the same time to improve the accuracy of the test. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a water supply pressure reducing valve corrosion resistance test device which can simulate actual working conditions to perform corrosion resistance tests on the inside of the water supply pressure reducing valve and perform salt spray corrosion resistance tests on the outside with high accuracy.

[0007] The invention discloses a corrosion resistance test device for a water supply pressure reducing valve, comprising a salt spray corrosion mechanism, wherein the salt spray corrosion mechanism performs a corrosion resistance test on the outer surface of the water supply pressure reducing valve, wherein the salt spray corrosion mechanism comprises a control box, a brine tank, a salt spray box, a salt spray generator and a box cover, wherein a control system and a high-pressure air pipeline are arranged inside the control box, the brine tank is installed on the control box, an experimental chamber is arranged inside the salt spray box, a take-in and put-out port is arranged on the upper end surface of the salt spray box, a salt spray generator is arranged in the experimental chamber of the salt spray box, the salt spray generator is connected to the control box and the brine tank through a hose, the box cover is rotatably hinged on the salt spray box, and the box cover closes the take-in and put-out port of the salt spray box; and further comprises an internal corrosion mechanism, wherein the internal corrosion mechanism performs a corrosion resistance test on the inside of the water supply pressure reducing valve, and ... The corrosion mechanism comprises a liquid storage tank, a circulating water pump, an upper water pipe and a return water pipe. A liquid storage chamber is arranged inside the liquid storage tank, a liquid filling port is arranged on the liquid storage tank, the liquid filling port is communicated with the liquid storage chamber of the liquid storage tank, a cover is arranged on the liquid filling port, the circulating water pump is installed outside the liquid storage tank, the circulating water pump is electrically connected to the control box, the liquid inlet pipe of the circulating water pump extends into the bottom of the liquid storage chamber of the liquid storage tank, the liquid outlet pipe of the circulating water pump is connected with the input end of the upper water pipe, the output end of the upper water pipe extends into the left part of the experimental chamber of the salt spray box, the input end of the return water pipe extends into the right part of the experimental chamber of the salt spray box, the output end of the return water pipe extends into the top of the liquid storage chamber of the liquid storage tank, and a plurality of relative valve installation components are arranged on the output end of the upper water pipe and the input end of the return water pipe; when conducting the experiment, the high The compressed air pipeline is connected to the external air supply system, a sodium chloride solution of a certain concentration is added to the brine tank, and a corrosive liquid of a certain concentration is added to the liquid storage tank. The corrosive liquid contains the main harmful substances in the water supply pipeline where the water supply pressure reducing valve is located, and the concentration of the harmful substances is increased by a certain multiple. The water inlet and outlet ends of multiple water supply pressure reducing valves are respectively connected to the water supply pipe and the return pipe through multiple installation components, and the output pressures of multiple water supply pressure reducing valves are adjusted to the same value. The box cover is closed, and the salt spray generator and the circulating water pump are turned on through the control box. The sodium chloride solution in the brine tank enters the salt spray generator through a hose. The control box delivers high-pressure air to the salt spray generator. When the high-pressure air is sprayed from the salt spray generator, it quickly brings the sodium chloride solution The high-concentration salt mist is used to conduct corrosion resistance test on the outer surface of the water supply pressure reducing valve. The circulating water pump draws out the liquid in the liquid storage tank and inputs it into the interior of multiple water supply pressure reducing valves through the upper water pipe, and returns to the liquid storage tank through the return water pipe to form a cycle, so as to realize the corrosion resistance test on the inside and outside of the water supply pressure reducing valve at the same time, shorten the experimental time, and the device has high integration, small space occupation, simple operation and can simulate the impact corrosion of the high-pressure flowing water on the internal of the water supply pressure reducing valve in actual work. After the experiment, the device is closed, the water supply pressure reducing valve is taken out, and the surface and internal corrosion of the water supply pressure reducing valve are evaluated through cleaning, drying, weighing, disassembly inspection and other steps to improve the accuracy of the experiment.

[0008] Preferably, the installation assembly includes a pressure gauge, multiple branch pipe valves, multiple bellows and multiple adapters, the pressure gauge is installed on the upper water pipe, the probe of the pressure gauge extends into the upper water pipe, the output end of the upper water pipe and the input end of the return pipe are both provided with multiple branch pipes, the multiple branch pipes of the upper water pipe are each provided with branch pipe valves, the multiple branch pipes of the return water pipe are each provided with bellows, one end of the adapter is provided with a thread matching the branch pipe and the bellows of the upper water pipe, the other end of the adapter is provided with a thread matching the water supply pressure reducing valve, one end of the multiple adapters are respectively threadedly connected to the multiple branch pipes and the multiple bellows of the upper water pipe, and the multiple adapters are respectively threadedly connected to the multiple branch pipes and the multiple bellows of the upper water pipe. The other end of the joint is rotatably screwed with the water inlet and outlet of multiple water supply pressure reducing valves; the pressure gauge detects the liquid pressure output by the circulating water pump. The adapter is provided with multiple models and specifications, and the diameter reduction ratios of adapters of different models and specifications are different. When conducting experiments, multiple matching adapters are selected according to the specifications of the water supply pressure reducing valve to connect the water inlet and outlet of the water supply pressure reducing valve with the water supply pipe and the return pipe. By setting multiple bellows, when installing the water supply pressure reducing valve, the multiple bellows will shrink and stretch accordingly, which is convenient for installation and enables the device to install water supply pressure reducing valves of different lengths, and is highly practical.

[0009] Preferably, it also includes two slide rails, a slide frame, multiple fixed pressure plates, multiple dynamic pressure plates and multiple screw rods, the two slide rails are respectively installed on the front and rear inner walls of the salt spray box, the two ends of the slide frame are respectively slidably connected to the two slide rails, multiple fixed pressure plates are evenly installed on the slide frame, multiple dynamic pressure plates are respectively opposite to the multiple fixed pressure plates, multiple screw rods are rotatably screwed with the brackets, multiple brackets are all installed on the slide frame, one end of the multiple screw rods are respectively rotatably connected with the dynamic pressure plates, and the other end of the multiple screw rods are installed with hand wheels; after the multiple water supply pressure reducing valves are installed between the water supply pipe and the return pipe, the position of the slide frame is adjusted along the two slide rails so that the multiple water supply pressure reducing valves are respectively located between the multiple fixed pressure plates and the multiple dynamic pressure plates, and the multiple screw rods are rotated by the hand wheel so that the multiple dynamic pressure plates and the multiple fixed pressure plates cooperate to clamp the upper part of the multiple water supply pressure reducing valves, thereby reducing the vibration of the valve body during the experiment and improving the stability.

[0010] Preferably, it also includes a residue receiving tray and a residue drain pipe, the residue receiving tray is installed in the experimental chamber of the salt spray box, the residue receiving tray is located below the multiple adapters, the upper end of the residue drain pipe is connected to the residue receiving tray, and the lower end of the residue drain pipe is connected to the liquid storage chamber of the liquid storage tank; after the experiment is completed, when the multiple water supply pressure reducing valves are disassembled, the residual liquid in the valve body is received by the residue receiving tray and flows back to the liquid storage chamber of the liquid storage tank through the residue drain pipe, thereby avoiding corrosive liquid from contaminating the interior of the salt spray box and improving the safety of the equipment.

[0011] Preferably, it also includes a heater and a temperature sensor, the heater is installed at the bottom of the experimental chamber of the salt spray box, the liquid level sensor is electrically connected to the controller of the control box, the temperature sensor is installed on the lower outer wall of the salt spray box, the temperature sensor is higher than the heater, the probe of the temperature sensor extends into the experimental chamber of the salt spray box, and the temperature sensor is electrically connected to the controller of the control box; during the experiment, a certain amount of water will be added to the experimental chamber of the salt spray box, the water level is higher than the temperature sensor, the heater is located in the water, and the water is heated, the hot water heats the experimental chamber of the salt spray box to a certain temperature as a whole, and the temperature sensor detects the water temperature to keep the water temperature within a certain range, so that the pressure reducing water supply valve is in a high temperature environment, the corrosion process is accelerated, and the experiment time is shortened.

[0012] Preferably, it also includes a liquid level sensor, which is installed at the lower part of the outer wall of the salt spray box, and the probe of the liquid level sensor extends into the experimental chamber of the salt spray box. The liquid level sensor is electrically connected to the controller of the control box; the liquid level sensor detects the water level in the salt spray box, and when the water level is lower than the liquid level sensor, the control box sends out an alarm and turns off the heater to prevent the heater from being damaged by dry burning, thereby improving the reliability of the equipment.

[0013] Preferably, the salt spray box further comprises a water seal groove, wherein the tops of the four side walls of the salt spray box are provided with water seal grooves, and the lower edge of the box cover is located and extends into the water seal groove; when starting the experiment, water is added to the water seal groove, and after the box cover is closed, the water in the water seal groove floods the gap between the box cover and the top surface of the salt spray box, thereby improving the sealing during the experiment and reducing the diffusion of high-concentration salt spray.

[0014] Preferably, it also includes a liquid level meter and a waste water pipe, the liquid level meter is installed on the outer wall of the liquid storage tank, the upper end and the lower end of the liquid level meter are respectively connected to the top and the bottom of the liquid storage chamber of the liquid storage tank, the waste water pipe is installed at the bottom of the outer wall of the liquid storage tank, the input end of the waste water pipe extends into the bottom of the liquid storage chamber of the liquid storage tank, and a valve is installed on the waste water pipe; the liquid level of the liquid in the liquid storage tank can be conveniently understood through the liquid level meter, and after the corrosive liquid fails, the valve of the waste water pipe is opened to discharge the waste liquid into the sewage treatment system, thereby improving the practicability of the equipment.

[0015] Compared with the prior art, the invention has the following beneficial effects: when conducting an experiment, the high-pressure air pipeline of the control box is connected to an external air supply system, a sodium chloride solution of a certain concentration is added to the salt water tank, and a corrosive liquid of a certain concentration is added to the liquid storage tank, wherein the corrosive liquid contains the main harmful substances in the water supply pipeline where the water supply pressure reducing valve is located, and the concentration of the harmful substances is increased by a certain multiple, the water inlet ends and the water outlet ends of multiple water supply pressure reducing valves are respectively connected to the water supply pipe and the water return pipe through multiple installation components, the output pressures of the multiple water supply pressure reducing valves are adjusted to the same value, the box cover is closed, the salt spray generator and the circulating water pump are turned on through the control box, the sodium chloride solution in the salt water tank enters the salt spray generator through a hose, the control box transports high-pressure air to the salt spray generator, and the high-pressure air is discharged from the salt spray generator. When the generator sprays out, the sodium chloride solution is quickly brought out and sprayed in the form of mist. The high-concentration salt mist performs corrosion resistance tests on the outer surface of the water supply pressure reducing valve. The circulating water pump draws out the liquid in the liquid storage tank and inputs it into the interior of multiple water supply pressure reducing valves through the upper water pipe, and returns it to the liquid storage tank through the return pipe to form a cycle, so as to realize corrosion resistance tests on the inside and outside of the water supply pressure reducing valve at the same time, shortening the experimental time. The device has high integration, small space occupation, simple operation and can simulate the impact corrosion of the high-pressure flowing water on the internal part of the water supply pressure reducing valve in actual work. After the experiment for a period of time, the device is closed, the water supply pressure reducing valve is taken out, and the surface and internal corrosion of the water supply pressure reducing valve are evaluated through cleaning, drying, weighing, disassembly inspection and other steps to improve the accuracy of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a front cross-sectional structural schematic diagram of the present invention;

[0018] Figure 3 It is a schematic diagram of the explosion structure of the main part of the present invention;

[0019] Figure 4 It is a schematic diagram of the axonometric structure of the present invention;

[0020] Figure 5 It is an enlarged structural diagram of the liquid storage tank, circulating water pump, water supply pipe and return pipe and installation components;

[0021] Figure 6 It is an enlarged structural diagram of the slide rail, slide frame, fixed pressure plate, movable pressure plate and screw rod;

[0022] Markings in the attached figure: 1. control box; 2. brine tank; 3. salt spray box; 4. salt spray generator; 5. box cover; 6. liquid storage tank; 7. circulating water pump; 8. water supply pipe; 9. return pipe; 10. pressure gauge; 11. branch valve; 12. bellows; 13. adapter; 14. slide rail; 15. slide; 16. fixed pressure plate; 17. dynamic pressure plate; 18. screw; 19. residue receiving tray; 20. residue discharge pipe; 21. heater; 22. temperature sensor; 23. liquid level sensor; 24. water seal tank; 25. liquid level meter; 26. waste water pipe. DETAILED DESCRIPTION

[0023] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0024] The main functions achieved by the present invention are:

[0025] 1. It can simulate the actual working conditions to conduct corrosion resistance test on the internal components and pipe wall of the water supply pressure reducing valve with high accuracy;

[0026] 2. The salt spray corrosion test is carried out on the outer surface of the water supply pressure reducing valve, which is highly practical;

[0027] 3. The corrosion resistance test of the inside and outside of the water supply pressure reducing valve is carried out in the salt spray chamber at the same time, with high integration and small space occupation;

[0028] 4. The adapter 13 is provided with various specifications, which can be applicable to water supply pressure reducing valves of various specifications. Water supply pressure reducing valves of various specifications can be subjected to corrosion resistance tests at the same time, and the adapter 13 has high versatility. Example 1

[0029] like Figure 1 , 2As shown in Figure 4, a corrosion resistance test device for a water supply pressure reducing valve includes a salt spray corrosion mechanism, wherein the salt spray corrosion mechanism performs a corrosion resistance test on the outer surface of the water supply pressure reducing valve, and the salt spray corrosion mechanism includes a control box 1, a brine tank 2, a salt spray box 3, a salt spray generator 4 and a box cover 5. A control system and a high-pressure air pipeline are arranged inside the control box 1, the brine tank 2 is mounted on the control box 1, an experimental chamber is arranged inside the salt spray box 3, a take-in and put-out port is arranged on the upper end surface of the salt spray box 3, the salt spray generator 4 is installed in the experimental chamber of the salt spray box 3, the salt spray generator 4 is connected to the control box 1 and the brine tank 2 through a hose, the box cover 5 is rotatably hinged on the salt spray box 3, and the box cover 5 closes the take-in and put-out port of the salt spray box 3; and also includes an internal corrosion mechanism, wherein the internal corrosion mechanism performs a corrosion resistance test on the inside of the water supply pressure reducing valve. The internal corrosion mechanism also includes a liquid storage tank 6, a circulating water pump 7, an upper water pipe 8 and a return water pipe 9. A liquid storage chamber is arranged inside the liquid storage tank 6. A liquid filling port is arranged on the liquid storage tank 6. The liquid filling port is communicated with the liquid storage chamber of the liquid storage tank 6. A cover is arranged on the liquid filling port. The circulating water pump 7 is installed outside the liquid storage tank 6. The circulating water pump 7 is electrically connected to the control box 1. The liquid inlet pipe of the circulating water pump 7 extends into the bottom of the liquid storage chamber of the liquid storage tank 6. The liquid outlet pipe of the circulating water pump 7 is connected to the input end of the upper water pipe 8. The output end of the upper water pipe 8 extends into the left part of the experimental chamber of the salt spray box 3. The input end of the return water pipe 9 extends into the right part of the experimental chamber of the salt spray box 3. The output end of the return water pipe 9 extends into the top of the liquid storage chamber of the liquid storage tank 6. A plurality of relative valve installation components are arranged on the output end of the upper water pipe 8 and the input end of the return water pipe 9.

[0030] The device provides another experimental method. When conducting the experiment, the high-pressure air pipeline of the control box 1 is connected to the external air supply system, a sodium chloride solution of a certain concentration is added to the salt water tank 2, and a corrosive liquid of a certain concentration is added to the liquid storage tank 6. The corrosive liquid contains the main harmful substances in the water supply pipeline where the water supply pressure reducing valve is located, and the concentration of the harmful substances is increased by a certain multiple. A plurality of water supply pressure reducing valves are disassembled and decomposed, and all parts of the plurality of water supply pressure reducing valves are placed in the experimental chamber of the salt spray box 3 using a grid bracket, the box cover 5 is closed, and the salt spray is turned on through the control box 1. Generator 4 and keep circulating water pump 7 closed, the sodium chloride solution in the brine tank 2 enters the salt spray generator 4 through the hose, the control box 1 delivers high-pressure air to the salt spray generator 4, and the high-pressure air quickly brings out the sodium chloride solution when it is sprayed out from the salt spray generator 4 and sprays it in the form of mist. The high-concentration salt spray conducts a corrosion resistance test on the outer surfaces of all components of the water supply pressure reducing valve. After a period of experiment, the device is closed, the water supply pressure reducing valve is taken out, and the corrosion conditions of all components of the water supply pressure reducing valve are evaluated through steps such as cleaning, drying, weighing, and inspection. It is suitable for pipelines with low flow rate and low pressure. Example 2

[0031] like Figure 3 , 5As shown in Figure 6, the installation assembly includes a pressure gauge 10, a plurality of branch pipe valves 11, a plurality of bellows 12 and a plurality of adapters 13. The pressure gauge 10 is installed on the upper water pipe 8, and the probe of the pressure gauge 10 extends into the upper water pipe 8. The output end of the upper water pipe 8 and the input end of the return water pipe 9 are both provided with a plurality of branch pipes. The branch pipes of the upper water pipe 8 are all provided with branch pipe valves 11, and the plurality of branch pipes of the return water pipe 9 are all provided with bellows 12. One end of the adapter 13 is provided with a thread matching the branch pipes of the upper water pipe 8 and the bellows 12, and the other end of the adapter 13 is provided with a thread matching the water supply pressure reducing valve. One end of the plurality of adapters 13 is respectively provided with a plurality of branch pipes of the upper water pipe 8 and a plurality of bellows 12. The other ends of the multiple adapters 13 are respectively rotatably screwed with the water inlets and outlets of the multiple water supply pressure reducing valves; it also includes two slide rails 14, a slide 15, a plurality of fixed pressure plates 16, a plurality of movable pressure plates 17 and a plurality of screw rods 18. The two slide rails 14 are respectively installed on the front and rear inner walls of the salt spray box 3, and the two ends of the slide 15 are respectively slidably connected with the two slide rails 14. The slide 15 is evenly installed with a plurality of fixed pressure plates 16, and the plurality of movable pressure plates 17 are respectively opposite to the plurality of fixed pressure plates 16. The plurality of screw rods 18 are all rotatably screwed with the brackets, and the plurality of brackets are all installed on the slide 15. One end of the plurality of screw rods 18 is respectively rotatably connected with the movable pressure plates 17, and the other end of the plurality of screw rods 18 is installed with a hand wheel.

[0032] The pressure gauge 10 detects the liquid pressure output by the circulating water pump 7. The adapter 13 is provided with a variety of models and specifications, but one end of all models of the adapter 13 is provided with a thread matching the branch pipe of the upper water pipe 8 and the bellows 12. The diameter reduction ratios of adapters 13 of different models and specifications are different. When conducting experiments, multiple matching adapters 13 are selected according to the specifications of the water supply pressure reducing valve. The water inlet and water outlet of the water supply pressure reducing valve are connected to the upper water pipe 8 and the return water pipe 9 through the multiple adapters 13. When the experiment is carried out, the multiple bellows 12 will shrink and stretch accordingly, and the position of the slide 15 will be adjusted along the two slide rails 14, so that the multiple water supply pressure reducing valves are respectively located between the multiple fixed pressure plates 16 and the multiple dynamic pressure plates 17, and the multiple screw rods 18 are rotated by the hand wheel to make the multiple dynamic pressure plates 17 and the multiple fixed pressure plates 16 cooperate to clamp the upper parts of the multiple water supply pressure reducing valves to reduce the vibration of the valve body during the experiment. Plastic gaskets can be arranged on the opposite surfaces of the fixed pressure plate 16 and the dynamic pressure plate 17 to protect the valve body and avoid corrosion by salt spray.

[0033] like Figures 1 to 6As shown, a corrosion resistance experimental device for a water supply pressure reducing valve of the present invention, when working, firstly, the water inlet ends and the water outlet ends of a plurality of water supply pressure reducing valves are connected to the branch pipes of the upper water pipe 8 and the return water pipe 9 through a plurality of adapters 13 respectively, and the valve bodies are fixed by using a plurality of fixed pressure plates 16 and a plurality of dynamic pressure plates 17, and then the output pressures of the plurality of water supply pressure reducing valves are adjusted to the same value, the box cover 5 is closed, and water is injected into the water seal groove 24 to seal, and then the salt spray generator 4 and the circulating water pump 7 are turned on through the control box 1, and the sodium chloride solution in the salt water tank 2 enters the salt spray generator 4 through the hose, and the control box 1 delivers high-pressure air to the salt spray generator 4 When high-pressure air is ejected from the salt spray generator 4, the sodium chloride solution is quickly taken out and sprayed in the form of mist. The high-concentration salt spray performs a corrosion resistance test on the outer surface of the water supply pressure reducing valve. The circulating water pump 7 draws out the liquid in the liquid storage tank 6 and inputs it into the interior of multiple water supply pressure reducing valves through the upper water pipe 8, and flows back to the liquid storage tank 6 through the return water pipe 9 to form a cycle. The high-pressure flowing corrosive liquid performs a corrosion resistance test on the interior of the water supply pressure reducing valve. After the experiment for a period of time, the device is closed, and finally the water supply pressure reducing valve is taken out, and the surface and internal corrosion conditions of the water supply pressure reducing valve are evaluated through steps such as cleaning, drying, weighing, and disassembly inspection.

[0034] The installation method, connection method or setting method of the corrosion resistance test device of a water supply pressure reducing valve of the present invention are all common mechanical methods, and any method that can achieve its beneficial effects can be implemented; the control box 1, brine tank 2, salt spray box 3, salt spray generator 4, box cover 5, liquid storage tank 6, circulating water pump 7, pressure gauge 10, branch valve 11, bellows 12, screw 18, heater 21, temperature sensor 22, liquid level sensor 23, and liquid level meter 25 of the corrosion resistance test device of a water supply pressure reducing valve of the present invention are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in this field.

[0035] All technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A corrosion resistance test device for a water supply pressure reducing valve, comprising a salt spray corrosion mechanism, wherein the salt spray corrosion mechanism performs a corrosion resistance test on the outer surface of the water supply pressure reducing valve, the salt spray corrosion mechanism comprising a control box (1), a salt water box (2), a salt spray box (3), a salt spray generator (4) and a box cover (5), wherein the salt water box (2) is mounted on the control box (1), the salt spray generator (4) is mounted in the salt spray box (3), and the box cover (5) is rotatably hinged on the salt spray box (3); characterized in that: The invention also includes an internal corrosion mechanism, which performs a corrosion resistance test on the inside of the water supply pressure reducing valve. The internal corrosion mechanism includes a liquid storage tank (6), a circulating water pump (7), a water supply pipe (8) and a water return pipe (9). The circulating water pump (7) is installed outside the liquid storage tank (6). The liquid inlet pipe of the circulating water pump (7) extends into the bottom of the liquid storage tank (6). The liquid outlet pipe of the circulating water pump (7) is connected to the input end of the water supply pipe (8). The output end of the water supply pipe (8) extends into the left part of the salt spray chamber (3). The input end of the water return pipe (9) extends into the right part of the salt spray chamber (3). The output end of the water return pipe (9) extends into the top of the liquid storage chamber of the liquid storage tank (6). A plurality of valve installation components are arranged on the output end of the water supply pipe (8) and the input end of the water return pipe (9). The installation assembly comprises a pressure gauge (10), a plurality of branch pipe valves (11), a plurality of bellows (12) and a plurality of adapters (13); the pressure gauge (10) is installed on the upper water pipe (8); a probe of the pressure gauge (10) extends into the upper water pipe (8); a plurality of branch pipes are provided at the output end of the upper water pipe (8) and the input end of the return water pipe (9); a plurality of branch pipes of the upper water pipe (8) are provided with branch pipe valves (11); a plurality of branch pipes of the return water pipe (9) are provided with bellows (12); one end of the adapter (13) is provided with threads matching the branch pipes and bellows (12) of the upper water pipe (8); the other end of the adapter (13) is provided with threads matching the water supply pressure reducing valve; one end of the plurality of adapters (13) is respectively threadedly connected to the plurality of branch pipes and the plurality of bellows (12) of the upper water pipe (8); the other end of the plurality of adapters (13) is respectively threadedly connected to the water inlets and water outlets of the plurality of water supply pressure reducing valves; The invention also comprises two slide rails (14), a slide frame (15), a plurality of fixed pressure plates (16), a plurality of dynamic pressure plates (17) and a plurality of screw rods (18). The two slide rails (14) are respectively mounted on the front and rear inner walls of the salt spray chamber (3). The two ends of the slide frame (15) are respectively slidably connected to the two slide rails (14). The slide frame (15) is evenly mounted with a plurality of fixed pressure plates (16). The plurality of dynamic pressure plates (17) are respectively opposite to the plurality of fixed pressure plates (16). The plurality of screw rods (18) are rotatably screwed to the brackets. The plurality of brackets are mounted on the slide frame (15). One end of the plurality of screw rods (18) is respectively rotatably connected to the dynamic pressure plates (17). The other ends of the plurality of screw rods (18) are respectively mounted with hand wheels.

2. A water supply pressure reducing valve corrosion resistance test device as claimed in claim 1, characterized in that: It also includes a residue receiving tray (19) and a residue drain pipe (20), wherein the residue receiving tray (19) is installed in the experimental chamber of the salt spray chamber (3), the residue receiving tray (19) is located below the plurality of adapters (13), the upper end of the residue drain pipe (20) is connected to the residue receiving tray (19), and the lower end of the residue drain pipe (20) is connected to the liquid storage chamber of the liquid storage tank (6).

3. A water supply pressure reducing valve corrosion resistance test device as claimed in claim 1, characterized in that: The invention also comprises a heater (21) and a temperature sensor (22), wherein the heater (21) is installed at the bottom of the experimental chamber of the salt spray chamber (3), the liquid level sensor (23) is electrically connected to the controller of the control box (1), and the temperature sensor (22) is installed on the lower outer wall of the salt spray chamber (3), the temperature sensor (22) is higher than the heater (21), a probe of the temperature sensor (22) extends into the experimental chamber of the salt spray chamber (3), and the temperature sensor (22) is electrically connected to the controller of the control box (1).

4. A water supply pressure reducing valve corrosion resistance test device as claimed in claim 1, characterized in that: It also includes a liquid level sensor (23), which is installed at the lower part of the outer wall of the salt spray box (3), and a probe of the liquid level sensor (23) extends into the experimental chamber of the salt spray box (3), and the liquid level sensor (23) is electrically connected to the controller of the control box (1).

5. A water supply pressure reducing valve corrosion resistance test device as claimed in claim 1, characterized in that: It also includes a water seal groove (24). The tops of the four side walls of the salt spray box (3) are provided with the water seal groove (24), and the lower edge of the box cover (5) is located and extends into the water seal groove (24).

6. A water supply pressure reducing valve corrosion resistance test device as claimed in claim 1, characterized in that: The invention also comprises a liquid level meter (25) and a waste water pipe (26), wherein the liquid level meter (25) is mounted on the outer wall of the liquid storage tank (6), the upper end and the lower end of the liquid level meter (25) are respectively connected to the top and the bottom of the liquid storage chamber of the liquid storage tank (6), and the waste water pipe (26) is mounted on the bottom of the outer wall of the liquid storage tank (6), the input end of the waste water pipe (26) extends into the bottom of the liquid storage chamber of the liquid storage tank (6), and a valve is mounted on the waste water pipe (26).

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