Experimental device for eroding metal surface by high-temperature particles
By designing a high-temperature particle erosion metal surface experimental device, the recycling of hot air and the automatic recovery of hard particles are realized, which solves the problems of high energy consumption, low automation and safety hazards in the existing technology and simulates the erosion environment under real working conditions.
Patent Information
- Application Number
- CN202510940846.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-09
- Publication Date
- 2025-09-23
AI Technical Summary
Existing experimental devices have problems such as high energy consumption, inability to recycle hot air, low automation level of hard particle recovery, and safety hazards when studying the erosion resistance of materials.
An experimental device for high-temperature particle erosion of metal surfaces was designed. A closed-loop design of a circulating hot air blower and a return air duct group was adopted to realize the recycling of hot air. The clamping device and the vibrating feeding device were used to realize the automatic recovery and separation of hard particles. A spiral elevator was used to automatically lift and reinject the particles.
It achieves stable control of experimental temperature, reduces heating energy consumption, improves the degree of automation, ensures operational safety, and can simulate the erosion environment under real working conditions.
Smart Images
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Abstract
Description
Technical Field
[0001] The invention relates to a high-temperature particle erosion metal surface experimental device. Background Art
[0002] Working environment and challenges of boiler return feeder The return feeder in a circulating fluidized bed (CFB) boiler system is a core component that maintains efficient boiler operation. In actual operation, the return feeder needs to continuously withstand: High-speed impact of high-concentration solid particles (fly ash, quartz sand, etc.); These harsh working conditions cause the return feeder lining material to face serious erosion and wear problems, with an average service life of only 6-12 months, making it one of the most vulnerable components in the CFB boiler system.
[0003] The current experimental devices used to study the erosion resistance of materials have the following main deficiencies: 1. The air inlet of the hot air blower is room temperature air, which needs to be heated repeatedly, resulting in high energy consumption and heat loss.
[0004] 2. The hot air blown out by the hot air blower is not reused, which causes the test environment to heat up. It can only be discharged externally, causing high-temperature pollution.
[0005] 3. Hard particles in the test process need to be recovered manually, the degree of automation is low, and there are certain safety hazards.
[0006] Based on the above problems, we designed a high-temperature particle erosion metal surface experimental device that can recycle hot air, separate hard particles, realize automatic recovery, and operate more safely. Summary of the Invention
[0007] The technical problem to be solved by the present invention is to provide a high-temperature particle erosion metal surface experimental device that can realize the recycling of hot air, separate hard particles, realize automatic recovery, and has safer operation.
[0008] In order to solve the above problems, the present invention adopts the following technical solutions: A high-temperature particle erosion metal surface experimental device, comprising: The experimental cabin has a hollow interior and an opening at the top. A lid is flipped over the opening. The experimental cabin has a bottom surface that tilts downward to the right. An arc-shaped discharge chute is machined at the lower end of the bottom surface. The rear end of the discharge chute tilts downward. A sealing block is machined on the bottom surface. A sloped surface is formed on the left side of the sealing block, and the sloped surface tilts downward to the left. A clamping device is movably installed in the experimental chamber and cooperates with the sealing block. When the clamping device moves horizontally to the right to the extreme position, the sealing block forms a seal on the bottom of the clamping device. At this time, the hard particles used for the experiment are blocked by the sealing block. When the clamping device moves horizontally to the left to the extreme position, the bottom of the clamping device opens, and the hard particles used for the experiment are discharged from the bottom, and then gather in the discharge chute after passing through the inclined bottom surface. The tested pipe is clamped by the clamping device; A circulating hot air blower, which sends air into the clamping device, and the sent hot air passes through the tested pipe; The return air duct group is connected between the clamping device and the circulating hot air blower. The hot air after passing through the tested pipe is filtered out by the clamping device, and then passes through the return air duct group and re-enters the circulating hot air blower from the air inlet position; a vibrating blanking device, the vibrating blanking device conveying hard particles toward the clamping device; A spiral elevator, the spiral elevator is connected to the discharge chute, and the discharge position of the spiral elevator is connected to the vibrating feeder; A controller is used to connect and control the clamping device, circulating hot air blower, vibrating blanking machine and spiral elevator.
[0009] Preferably, the clamping device includes a fixed clamping tube, a movable clamping tube, a filter cartridge, a return air hood, an electric push rod and an extension rod; the movable clamping tube is a bent tube, one end of which is opposite to the fixed clamping tube, and the other is bent vertically downward, and stepped surfaces for limiting the position of the tested pipe are provided on the opposite surfaces of the fixed clamping tube and the movable clamping tube, the lower end of the movable clamping tube is inserted into the filter cartridge and welded to the filter cartridge to form a seal, the return air hood is welded to the outer wall of the filter cartridge, and filter holes are distributed at the position of the filter cartridge corresponding to the return air hood, the aperture of the filter holes is smaller than the particle size of the hard particles, a connecting pipe is welded to the outside of the return air hood, and a transverse groove is processed at the rear end of the experimental cabin, the connecting pipe is inserted through the transverse groove, and the connecting pipe is connected to the return air duct group; the movable clamping tube A socket is provided at the outer end of the said extension rod, one end of the said extension rod is inserted into the said socket and fixed, and the other end of the said extension rod is fixed to the movable end of the said electric push rod; a frame plate is welded on the outside of the said experimental cabin, the said electric push rod is fixed to the said frame plate, and a through hole is processed in the side of the said experimental cabin, and the movable end of the said electric push rod passes through the through hole; after the said electric push rod is fully pushed out, the lower end of the said filter cartridge is sealed by the said sealing block; when the said electric push rod is retracted, the lower end surface of the said filter cartridge is separated from the said sealing block. At this time, the hard particles in the filter cartridge are discharged; a feeding pipe is provided at the upper end of the said fixed clamping tube, which is inclined to the upper right, and the said vibrating blanking device is connected to the said feeding pipe; the said electric push rod is controlled by the said controller; a passive pushing device is installed through the said movable clamping tube.
[0010] Preferably, a wear-resistant block is welded at the arc-shaped bend of the movable clamping tube, and the outer end surface of the wear-resistant block is a guide slope, and the hot air passes through the guide slope and then enters the filter cylinder downward.
[0011] Preferably, an inner rod is welded on the guide slope, and the end of the inner rod is processed with a conical diversion end, and the diversion end is located in the pipe being tested. The high-temperature airflow blown in from the fixed clamping tube is diverted through the diversion end and erodes the inner wall of the pipe being tested.
[0012] Preferably, the return air duct group includes a first pipe, a second pipe and a third pipe, the first pipe and the second pipe are both bent pipes, one end of the first pipe is fixedly connected to the connecting pipe, the other end of the first pipe is coaxial with the third pipe, one end of the third pipe is welded and fixed to the second pipe, and the other end of the third pipe is inserted into the first pipe, and a high-temperature resistant sealing ring is clamped on the outer wall of the third pipe, forming a seal between the sealing ring and the inner wall of the first pipe; a limiting end cover is threadedly connected to the end of the first pipe, and the limiting end cover limits the outward movement of the sealing ring; the end of the second pipe away from the third pipe is connected to the air inlet end of the circulating hot air blower.
[0013] Preferably, a first temperature sensor is embedded in the outer wall of the fixed clamping tube, located on the right side of the feeding tube, and a second temperature sensor is embedded in the second pipe. The outlet air temperature of the circulating hot air blower is monitored by the first temperature sensor, and the return air temperature of the circulating hot air blower is monitored by the second temperature sensor. The first temperature sensor and the second temperature sensor are both connected to the controller. A three-color warning light is integrated on the outside of the experimental cabin, and the three-color warning light is connected to the controller.
[0014] Preferably, a branch pipe opening is welded at the outer wall of the second pipe, and a solenoid valve is installed at the branch pipe opening. The solenoid valve is connected to the controller. When the second temperature sensor detects that the inlet air temperature exceeds the set value of the controller, the solenoid valve opens and draws in normal temperature air from the solenoid valve.
[0015] Preferably, the vibrating blanking device includes a vibrating blanking machine, a first solenoid valve, a first connecting pipe and a second connecting pipe. The first solenoid valve is installed at the discharge position of the vibrating blanking machine. The first connecting pipe connects the first solenoid valve and the feeding pipe; the second connecting pipe connects the vibrating blanking machine and the screw elevator; a high-temperature resistant flexible pipe is integrated on the first connecting pipe and the second connecting pipe, and the vibrating blanking machine is connected to the controller.
[0016] Preferably, the passive ejection device includes a clamping sleeve, two side plates are welded on the outer wall of the clamping sleeve, a guide rod is welded on the side of the side plate facing the movable clamping tube, and a first side plate is welded on the outer side of the movable clamping tube, the guide rod passes through the first side plate and cooperates with a limiting nut, a spring is sleeved on the guide rod, and the spring acts between the side plate and the first side plate; the tested pipe fitting is clamped by the clamping sleeve, and a hand screw is screwed into the upper end of the clamping sleeve, and the hand screw is against the tested pipe fitting after being screwed in, and the clamping sleeve is coaxial with the fixed clamping tube and the movable clamping tube respectively.
[0017] The beneficial effects of the present invention are: High-temperature adaptability: Through the closed-loop design of the circulating hot air blower and return air duct group, the experimental temperature can be stably controlled between 200°C and 950°C (covering the typical operating conditions of the CFB return feeder). The branch pipe opening can be actively opened to introduce cold air to simulate temperature fluctuations. In addition, hot air circulation can be achieved to reduce heating energy consumption.
[0018] Particle characteristics matching: The vibration feeding device supports real return media such as fly ash and quartz sand (Mohs hardness 7~8); Automatic recovery-lifting-reinjection: After erosion, the particles are collected in the discharge trough through the inclined bottom surface and automatically sent back to the vibrating discharge device by the spiral elevator (made of high-temperature resistant alloy), realizing closed-loop utilization of particles without manual intervention; Anti-clogging design: The curved bottom + tilted design of the discharge chute ensures smooth discharge of high-flow particles; Dynamic erosion simulation: By optimizing the airflow distribution at the splitter end, the particles act evenly on the sample surface at an impact angle of 15° to 30° (simulating the working conditions of the inclined pipe section of the return feeder). BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0020] Figure 1 A perspective view of the present invention; Figure 2 A top view of the present invention; Figure 3 This is a cross-sectional view of the experimental cabin; Figure 4 It is a schematic diagram of the retraction of the clamping device; Figure 5 It is the cross-sectional view at point A; Figure 6 This is an enlarged view of point B. DETAILED DESCRIPTION
[0021] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.
[0022] Any feature disclosed in this specification (including any appended claims, abstract, and drawings), unless otherwise stated, may be replaced by other equivalent or similar features. In other words, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.
[0023] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.
[0024] In addition, in the description of the present invention, “a plurality of” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.
[0025] In the present invention, unless otherwise expressly specified or limited, terms such as "disposed," "socketed," "connected," "through," and "inserted" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise expressly specified or limited. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.
[0026] See Figure 1 、 Figure 2 and Figure 3 The experimental device for high temperature particle erosion of metal surface shown in the figure includes: The experimental cabin 1 has a hollow interior and an opening at the upper end. A box cover 11 is flipped over and fitted at the opening. The experimental cabin 1 has a sloping bottom surface 12 that tilts downward to the right. An arc-shaped discharge chute 13 is machined at the lower end of the sloping bottom surface 12. The rear end of the discharge chute 13 tilts downward. A sealing block 14 is machined on the sloping bottom surface 12. A sloped surface 144 is formed on the left side of the sealing block 14. The sloped surface 144 tilts downward to the left. The clamping device 2 is movably installed in the experimental chamber 1 and cooperates with the sealing block 14. When the clamping device 2 moves horizontally to the right to the extreme position, the sealing block 14 forms a seal on the bottom of the clamping device 2. At this time, the hard particles used for the experiment are blocked by the sealing block 14. When the clamping device 2 moves horizontally to the left to the extreme position, the bottom of the clamping device 2 opens, and the hard particles used for the experiment are discharged from the bottom, and then pass through the inclined bottom surface 12 and gather in the discharge chute 13. The tested pipe is clamped by the clamping device 2; A circulating hot air blower 3, which sends air into the clamping device 2, and the sent hot air passes through the tested pipe; The return air duct group 4 is connected between the clamping device 2 and the circulating hot air blower 3. The hot air after passing through the tested pipe is filtered out by the clamping device 2, and then passes through the return air duct group 4 and re-enters the circulating hot air blower 3 from the air inlet position; a vibrating blanking device 5 for conveying hard particles toward the clamping device 2; A spiral elevator 6 (made of high-temperature resistant alloy), the spiral elevator 6 is connected to the discharge chute 13, and the discharge position of the spiral elevator 16 is connected to the vibrating feeder 5; The controller 7 is connected to control the clamping device 2, the circulating hot air blower 3, the vibrating blanking machine 5 and the spiral elevator 6.
[0027] The testing method for the tested pipe 10 is as follows: In the first step, the clamping device 2 completes the clamping of the pipe 10 . After the clamping is completed, the lower end of the clamping device 2 is sealed by the sealing block 14 .
[0028] In the second step, the output power of the circulating hot air blower 3 is set through the controller 7, and the temperature is waited for to rise to the set temperature (the set temperature is 200-950 degrees Celsius).
[0029] In the third step, the vibrating blanking device 5 is pre-filled with hard particles. In this embodiment, the hard particles are silica particles (Mohs hardness 7). Real materials can also be used for simulation (real materials need to be made into particles with a regular particle size). When the output temperature of the circulating hot air blower 3 stabilizes, the vibrating blanking device 5 begins to vibrate and discharge the hard particles. The hard particles are input into the clamping device 2. The high-speed and high-temperature airflow blown by the circulating hot air blower 3 drives the hard particles to impact the inner wall of the tested pipe 10. The erosion test time is set by the controller 7 (the discharge speed of the vibrating blanking device 5 is pre-calculated to avoid excessive output of hard particles affecting the return air of the return air duct group 4). The fourth step is to stop the output of the circulating hot air blower 3 after the test time is reached. At the same time, the clamping device 2 retracts so that the tested pipe 10 is pushed out. The pipe 10 is then disassembled and the inner wall is observed by measuring equipment, thus completing a set of experimental processes.
[0030] In the above technical solution, the high-temperature airflow can be recycled and reused, and the hard particles used for the experiment can be separated. After a test is completed, the hard particles are lifted back into the vibrating feeding device 5 via the spiral elevator 6.
[0031] See Figure 2 and Figure 3As shown, the clamping device 2 includes a fixed clamping tube 21, a movable clamping tube 22, a filter cartridge 23, a return air cover 24, an electric push rod 25 and an extension rod 26; the movable clamping tube 22 is a curved tube, one end of which is opposite to the fixed clamping tube 21, and the other end is bent vertically downward, and a stepped surface 210 for limiting the position of the tested pipe is provided on the opposite surfaces of the fixed clamping tube 21 and the movable clamping tube 22, and the lower end of the movable clamping tube 22 is inserted into the filter cartridge 23 and is in contact with the filter cartridge 23. The filter cartridge 23 is welded to form a seal, and the return air cover 24 is welded to the outer wall of the filter cartridge 23. Filter holes 231 are evenly distributed at the position of the filter cartridge 23 corresponding to the return air cover 24. The aperture of the filter hole 231 is smaller than the particle size of the hard particles. A connecting pipe 241 is welded to the outside of the return air cover 24. A transverse groove 121 is processed at the rear end of the experimental cabin 1. The connecting pipe 241 is inserted through the transverse groove 121 and connected to the return air pipe group 4; the movable clamping pipe A socket 221 is provided at the outer end of 22, one end of the extension rod 26 is inserted into the socket 221 and fixed, and the other end of the extension rod 26 is fixed to the movable end of the electric push rod 25; a frame plate 131 is welded on the outer side of the experimental cabin 1, and the electric push rod 25 is fixed on the frame plate 131. A through hole 141 is processed on the side of the experimental cabin 1, and the movable end of the electric push rod 25 passes through the through hole 141; after the electric push rod 25 is fully pushed out, the lower end of the filter cartridge 23 is sealed by the sealing block 14; when the electric push rod 25 retracts, the lower end surface of the filter cartridge 23 is separated from the sealing block 14, at this time, the hard particles in the filter cartridge 23 are discharged; a feeding pipe 212 is provided at the upper end of the fixed clamping tube 21, which is inclined to the upper right, and the vibrating blanking device 5 is connected to the feeding pipe 212; the electric push rod 25 is controlled by the controller 7; a passive pushing device 9 is installed through the movable clamping tube 22.
[0032] In the above technical solution, the clamping of the tested pipe 10 is completed by the cooperation of the fixed clamping tube 21 and the movable clamping tube 22 .
[0033] During the test, the hot air blown out by the circulating hot air blower 3 passes through the filter cartridge 23, and then is transported to the return air duct group 4 through the return air cover 24, and then re-enters the air inlet end of the circulating hot air blower 3. By increasing the air inlet temperature of the circulating hot air blower 3, the heating efficiency can be improved and the heating energy consumption can be saved.
[0034] During the test, hard particles are intercepted in the filter cartridge 23. After the test is completed, the electric push rod 25 retracts, so that the lower end surface of the filter cartridge 23 is separated from the sealing block 14, so that the hard particles intercepted in the filter cartridge 23 are discharged and recycled through the spiral elevator 6, eliminating the manual recycling step.
[0035] See Figure 3 As shown, a wear-resistant block 2210 is welded to the arc-shaped bend of the movable clamping tube 22 , and the outer end surface of the wear-resistant block 2210 is a guide slope 2211 , and the hot air passes through the guide slope 2211 and enters the filter cartridge 23 downward.
[0036] The wear-resistant block 2210 is made of silicon carbide (Mohs hardness is 9.5), which withstands the positive impact of hard particles and changes the direction of airflow.
[0037] See Figure 3 As shown, an inner rod 2212 is welded on the guide slope 2211, and a conical diversion end 2213 is processed at the end of the inner rod 2212. The diversion end 2213 is located in the pipe 10 to be tested. The high-temperature airflow blown in from the fixed clamping tube 21 is diverted through the diversion end 2213 and erodes the inner wall of the pipe to be tested.
[0038] In the above technical solution, the inner rod 2212 and the diverter end 2213 are both made of silicon carbide material. The diverter end 2213 can realize the diversion of the airflow, so that the hard particles blown out by the high-temperature and high-speed airflow can effectively contact the inner wall of the pipe 10.
[0039] See Figure 2 、 Figure 4 and Figure 5 As shown, the return air duct group 4 includes a first duct 41, a second duct 42 and a third duct 43. The first duct 41 and the second duct 42 are both bent pipes. One end of the first duct 41 is fixedly connected to the connecting pipe 241, and the other end of the first duct 41 is coaxial with the third duct 43. One end of the third duct 43 is welded and fixed to the second duct 42, and the other end of the third duct 43 is inserted into the first duct 41. A high-temperature resistant sealing ring 44 is clamped on the outer wall of the third duct 43, and a seal is formed between the sealing ring 44 and the inner wall of the first duct 41; a limiting end cover 45 is threadedly connected to the end of the first duct 41, and the limiting end cover 45 limits the outward movement of the sealing ring 44; the end of the second duct 42 away from the third duct 43 is connected to the air inlet end of the circulating hot air blower 3.
[0040] In the above technical solution, the sealing ring 44 is a metal sealing ring, and a small gap is maintained between its outer wall and the inner wall of the first pipe 41. During the return air process, the suction force of the circulating hot air blower 3 is used to suck air, so maintaining a small gap will not cause the heat to be lost outward.
[0041] In the above technical solution, the expansion and contraction of the third pipe 43 along the first pipe 41 can meet the displacement requirements of the clamping device 2 .
[0042] See Figure 1 and Figure 2 As shown, a first temperature sensor 71 is embedded in the outer wall of the fixed clamping tube 21, located on the right side of the feeding tube 212, and a second temperature sensor 72 is embedded in the second pipe 42. The outlet air temperature of the circulating hot air blower 3 is monitored by the first temperature sensor 71, and the return air temperature of the circulating hot air blower 3 is monitored by the second temperature sensor 72. The first temperature sensor 71 and the second temperature sensor 72 are both connected to the controller 7. A three-color warning light 73 is integrated on the outside of the experimental chamber 1, and the three-color warning light 73 is connected to the controller 7.
[0043] In the above technical solution, when the first temperature sensor 71 detects that the output temperature of the circulating hot air blower 3 reaches the temperature set by the controller 7, the three-color warning light 73 lights up green, and when it does not reach the set temperature, the three-color warning light 73 does not light up.
[0044] When the second temperature sensor 72 detects that the temperature of the return air is greater than the temperature set by the controller 7 , the three-color warning light 73 turns red and keeps flashing.
[0045] When the first temperature sensor 71 detects that the air outlet temperature is greater than the safety threshold of the temperature set by the controller 7, the three-color warning light 73 turns yellow and the yellow light is always on.
[0046] See Figure 2 As shown, a branch pipe mouth 421 is welded at the outer wall of the second pipe 42, and a solenoid valve 422 is installed at the branch pipe mouth 421. The solenoid valve 422 is connected to the controller 7. When the second temperature sensor 72 detects that the inlet air temperature exceeds the set value of the controller 7, the solenoid valve 422 opens and draws in normal temperature air from the solenoid valve 422.
[0047] In this technical solution, the air can be opened to inhale air at normal temperature to avoid the situation where the air inlet temperature is too high.
[0048] See Figure 2 As shown, the vibrating blanking device 5 includes a vibrating blanking machine 51, a first solenoid valve 52, a first connecting pipe 53 and a second connecting pipe 54. The first solenoid valve 52 is installed at the discharge position of the vibrating blanking machine 51. The first connecting pipe 53 connects the first solenoid valve 52 and the feeding pipe 212; the second connecting pipe 54 connects the vibrating blanking machine 51 and the screw elevator 6; a high-temperature resistant flexible pipe 55 is integrated on the first connecting pipe 53 and the second connecting pipe 54, and the vibrating blanking machine 51 is connected to the controller 7.
[0049] In the above technical solution, the flexible tube 55 is a metal braided hose.
[0050] During the test, the first solenoid valve 52 is kept normally open or intermittently opened to meet the material discharge requirement.
[0051] After the test is completed, the second solenoid valve 52 remains closed, so that the hard particles lifted by the screw elevator 6 are stored in the vibrating feeder 51 .
[0052] See Figure 6 As shown, the passive ejection device 9 includes a clamping sleeve 91, and two side plates 92 are welded to the outer wall of the clamping sleeve 91, and a guide rod 93 is welded on the side of the side plate 92 facing the movable clamping tube 22, and a first side plate 94 is welded on the outer side of the movable clamping tube 22. The guide rod 93 passes through the first side plate 94 and cooperates with a limiting nut 95. A spring 96 is sleeved on the guide rod 93, and the spring 96 acts between the side plate 92 and the first side plate 94; the tested pipe fitting is clamped by the clamping sleeve 91, and a hand screw 97 is screwed into the upper end of the clamping sleeve 91. After the hand screw 97 is screwed in, it presses against the tested pipe fitting 10, and the clamping sleeve 91 is coaxial with the fixed clamping tube 21 and the movable clamping tube 22, respectively.
[0053] In the above technical solution, the clamping sleeve 91 can be used to pre-clamp the pipe 10. After clamping is completed, the pipe 10 is clamped by resetting the movable clamping tube 22 without the need for hand-held clamping, thereby achieving a technical effect of safety protection.
[0054] After the test is completed, the movable clamping tube 22 retracts, so that the two ends of the pipe 10 are separated from the fixed clamping tube 21 and the movable clamping tube 22 respectively, so that the test piece can be taken out easily.
[0055] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.
Claims
1. A high-temperature particle erosion metal surface experimental device, characterized by: include, An experimental cabin (1) is provided, wherein the interior of the experimental cabin (1) is a cavity, the upper end of the experimental cabin (1) is an opening, and a box cover (11) is turned over and fitted at the opening. The experimental cabin (1) has an inclined bottom surface (12) inclined to the lower right, and an arc-shaped discharge chute (13) is processed at the lower end of the inclined bottom surface (12). The rear end of the discharge chute (13) is inclined downward, and a sealing block (14) is processed on the inclined bottom surface (12). The left side of the sealing block (14) is processed to form a slope surface (144), and the slope surface (144) is inclined to the lower left; A clamping device (2), wherein the clamping device (2) is movably installed in the experimental chamber (1) and cooperates with the sealing block (14). When the clamping device (2) moves horizontally to the right to the extreme position, the sealing block (14) forms a seal on the bottom of the clamping device (2). At this time, the hard particles used for the experiment are blocked by the sealing block (14). When the clamping device (2) moves horizontally to the left to the extreme position, the bottom of the clamping device (2) opens, and the hard particles used for the experiment are discharged from the bottom, and then gather in the discharge trough (13) after passing through the inclined bottom surface (12). The tested pipe fitting is clamped by the clamping device (2); A circulating hot air blower (3), the circulating hot air blower (3) blows air into the clamping device (2), and the blown hot air passes through the pipe being tested; A return air duct group (4), the return air duct group (4) is connected between the clamping device (2) and the circulating hot air blower (3), and the hot air after passing through the tested pipe is filtered out by the clamping device (2), and then passes through the return air duct group (4) and re-enters the circulating hot air blower (3) from the air inlet position; a vibrating blanking device (5), wherein the vibrating blanking device (5) conveys hard particles toward the clamping device (2); A spiral elevator (6), the spiral elevator (6) is connected to the discharge chute (13), and the discharge position of the spiral elevator (16) is connected to the vibrating feeder (5); A controller (7) is connected and controlled via the controller (7) to control the clamping device (2), the circulating hot air blower (3), the vibrating blanking machine (5) and the spiral elevator (6).
2. The high-temperature particle erosion metal surface experimental device according to claim 1, characterized in that: The clamping device (2) comprises a fixed clamping tube (21), a movable clamping tube (22), a filter cartridge (23), a return air cover (24), an electric push rod (25) and an extension rod (26); the movable clamping tube (22) is a curved tube, one end of which is opposite to the fixed clamping tube (21), and the other end is bent vertically downward, and stepped surfaces (210) for limiting the position of the tested pipe are provided on the opposite surfaces of the fixed clamping tube (21) and the movable clamping tube (22), and the lower end of the movable clamping tube (22) is inserted into the filter cartridge (23) and is in contact with the filter cartridge ( 23) is welded to form a seal, the return air cover (24) is welded to the outer wall of the filter cartridge (23), filter holes (231) are evenly distributed at the position of the filter cartridge (23) corresponding to the return air cover (24), the aperture of the filter hole (231) is smaller than the particle size of the hard particles, a connecting pipe (241) is welded on the outside of the return air cover (24), a transverse groove (121) is processed at the rear end of the experimental chamber (1), the connecting pipe (241) is inserted through the transverse groove (121), and the connecting pipe (241) is connected to the return air pipe group (4); the movable clamping pipe ( 22) is provided with a socket (221) at the outer end, one end of the extension rod (26) is inserted into the socket (221) and fixed, and the other end of the extension rod (26) is fixed to the movable end of the electric push rod (25); a frame plate (131) is welded on the outer side of the experimental cabin (1), and the electric push rod (25) is fixed on the frame plate (131); a through hole (141) is processed on the side of the cabin (1), and the movable end of the electric push rod (25) passes through the through hole (141); after the electric push rod (25) is completely pushed out, The lower end of the filter cartridge (23) is sealed by the sealing block (14); when the electric push rod (25) retracts, the lower end surface of the filter cartridge (23) is separated from the sealing block (14), and at this time, the hard particles in the filter cartridge (23) are discharged; a feeding pipe (212) is provided at an angle to the upper right of the upper end of the fixed clamping tube (21), and the vibrating feeding device (5) is connected to the feeding pipe (212); the electric push rod (25) is controlled by the controller (7); and a passive ejection device (9) is installed through the movable clamping tube (22).
3. The high-temperature particle erosion metal surface experimental device according to claim 2, characterized in that: A wear-resistant block (2210) is welded to the arc-shaped bend of the movable clamping tube (22), and the outer end surface of the wear-resistant block (2210) is a guide slope (2211), through which hot air flows downward into the filter cartridge (23).
4. The high-temperature particle erosion metal surface experimental device according to claim 3, characterized in that: An inner rod (2212) is welded to the guide slope (2211), and a conical diversion end (2213) is machined at the end of the inner rod (2212). The diversion end (2213) is located in the pipe fitting (10) to be tested, and the high-temperature airflow blown in from the fixed clamping tube (21) is diverted through the diversion end (2213) and erodes the inner wall of the pipe fitting to be tested.
5. The high-temperature particle erosion metal surface experimental device according to claim 2, characterized in that: The return air duct group (4) includes a first duct (41), a second duct (42) and a third duct (43), wherein the first duct (41) and the second duct (42) are both bent ducts, one end of the first duct (41) is fixedly connected to the connecting duct (241), the other end of the first duct (41) is coaxial with the third duct (43), one end of the third duct (43) is welded and fixed to the second duct (42), and the other end of the third duct (43) is inserted into the first duct (41), and a high-temperature resistant sealing ring (44) is clamped on the outer wall of the third duct (43), and a seal is formed between the sealing ring (44) and the inner wall of the first duct (41); a limiting end cover (45) is threadedly connected to the end of the first duct (41), and the limiting end cover (45) limits the outward movement of the sealing ring (44); the end of the second duct (42) away from the third duct (43) is connected to the air inlet end of the circulating hot air blower (3).
6. The high-temperature particle erosion metal surface experimental device according to claim 5, characterized in that: A first temperature sensor (71) is embedded in the outer wall of the fixed clamping tube (21), located on the right side of the feeding tube (212), and a second temperature sensor (72) is embedded in the second pipe (42). The outlet air temperature of the circulating hot air blower (3) is monitored by the first temperature sensor (71), and the return air temperature of the circulating hot air blower (3) is monitored by the second temperature sensor (72). The first temperature sensor (71) and the second temperature sensor (72) are both connected to the controller (7). A three-color warning light (73) is integrated on the outer side of the experimental chamber (1), and the three-color warning light (73) is connected to the controller (7).
7. The high-temperature particle erosion metal surface experimental device according to claim 6, characterized in that: A branch pipe opening (421) is welded to the outer wall of the second pipe (42), and a solenoid valve (422) is installed at the branch pipe opening (421). The solenoid valve (422) is connected to the controller (7). When the second temperature sensor (72) detects that the inlet air temperature exceeds the set value of the controller (7), the solenoid valve (422) opens, and air at normal temperature is sucked in from the solenoid valve (422).
8. The high-temperature particle erosion metal surface experimental device according to claim 2, characterized in that: The vibrating blanking device (5) comprises a vibrating blanking machine (51), a first solenoid valve (52), a first connecting pipe (53) and a second connecting pipe (54), wherein the first solenoid valve (52) is installed at the discharge position of the vibrating blanking machine (51), the first connecting pipe (53) connects the first solenoid valve (52) and the feeding pipe (212); the second connecting pipe (54) connects the vibrating blanking machine (51) and the screw elevator (6); a high-temperature resistant flexible pipe (55) is integrated on the first connecting pipe (53) and the second connecting pipe (54), and the vibrating blanking machine (51) is connected to the controller (7).
9. The high-temperature particle erosion metal surface experimental device according to claim 2, characterized in that: The passive ejection device (9) includes a clamping sleeve (91), two side plates (92) are welded on the outer wall of the clamping sleeve (91), a guide rod (93) is welded on the side of the side plate (92) facing the movable clamping tube (22), and a first side plate (94) is welded on the outer side of the movable clamping tube (22), the guide rod (93) passes through the first side plate (94) and is matched with a limit nut (95), a spring (96) is sleeved on the guide rod (93), and the spring (96) acts between the side plate (92) and the first side plate (94); the tested pipe fitting is clamped by the clamping sleeve (91), and a hand screw (97) is screwed into the upper end of the clamping sleeve (91), and the hand screw (97) is screwed in to abut the tested pipe fitting (10), and the clamping sleeve (91) is coaxial with the fixed clamping tube (21) and the movable clamping tube (22), respectively.