Water gap anti-scouring performance testing device

Abstract

The utility model relates to the technical field of water gap production, in particular to a water gap anti-scouring performance testing device, which comprises a water gap anti-scouring testing mechanism and a water gap anti-scouring testing mechanism, the internal and external local washing mechanism is fixed at the upper part in the protective shell and can change the washing form according to requirements; the lifting mechanism is fixed to the bottom in the protective shell and can drive the water gap to ascend and descend. According to the utility model, through the driving of the first electric push rod, not only can the internal structure of the pipe be changed to wash the inner wall of the water gap, but also other structures of the pipe can be changed, so that the outer wall of the water gap can be washed in a surrounding manner while the water gap is internally washed; the abrasion difference of the outer wall of the nozzle at different force bearing points can be detected through all-directional scouring, great significance is achieved for judging the deformation and cracking tendency of the whole structure of the nozzle after long-term erosion, it is guaranteed that materials of the nozzle are durable in the complex external environment, the structure of the nozzle can be kept stable, and production continuity is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a water gap production technical field, and specifically is a water gap anti-erosion performance testing device. BACKGROUND

[0002] In the metallurgical industry, the anti-erosion performance of the water gap directly relates to the stability of production and product quality. However, the current water gap anti-erosion performance test has some limitations.

[0003] The conventional testing method usually fixes the water gap at a specific position and uses a relatively single erosion mode. Most of them focus on a certain direction, such as the common top-down erosion, or only apply the erosion force at a limited number of angles. This results in uneven stress on each part of the water gap, such as the side surface, bottom corner, internal bend, and other special positions, which are difficult to be fully eroded, greatly affecting the evaluation accuracy of the real anti-erosion capacity. SUMMARY

[0004] The utility model aims at providing a water gap anti-erosion performance testing device to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A water gap anti-erosion performance testing device, comprising:

[0007] A water gap anti-erosion testing mechanism, comprising a protective shell;

[0008] An internal and external partial erosion mechanism, fixed inside the protective shell at the upper position, can change the erosion form according to requirements;

[0009] A lifting mechanism, fixed at the bottom of the protective shell, can drive the water gap to lift;

[0010] A ring frame one, fixed between the inner wall of the protective shell and the lifting mechanism, can seal the lifting mechanism to prevent the original liquid from seeping into the inside;

[0011] A rotating mechanism, fixed on the lifting mechanism, can drive the water gap to rotate;

[0012] A clamping mechanism, fixed on the lifting mechanism.

[0013] Further, the internal and external partial erosion mechanism comprises:

[0014] Two square rods one, fixed at equal angles with the inner wall of the protective shell;

[0015] A U-shaped frame, fixed between the outer walls of the two square rods one, the outer wall of the U-shaped frame is fixedly connected with an electric push rod one;

[0016] Cover plate, fixed at the one end of the electric push rod.

[0017] Preferably, the internal and external partial flushing mechanism comprises:

[0018] Pipe, fixed between the outer wall of the two square rods, a ring groove is formed at the top of the pipe;

[0019] Ring frame two, fixed to the outer wall of the cover plate, the outer wall of the ring frame two is inserted into the inner ring groove.

[0020] Preferably, the internal and external partial flushing mechanism comprises:

[0021] Round rod, provided with two, fixed on the outer wall of the cover plate at equal angles;

[0022] Arc plate, fixed between the outer wall of the two round rods at one end, the arc plate is fixedly connected with a circular tube at the center;

[0023] Conical shell, fixed at one end of the circular tube, a plurality of circular holes are formed at equal angles on the outer wall of the conical shell around its axis.

[0024] Preferably, the internal and external partial flushing mechanism comprises:

[0025] Square groove, provided with two, formed at equal angles on the outer wall of the cover plate;

[0026] Square rod two, provided with two, sliding on the outer wall of the cover plate at equal angles, the outer wall of the square rod two is fixedly connected with a square block two, the outer wall of the square block two is inserted into the inner cover plate;

[0027] Bevel ring block, fixed between the outer wall of the two square rods two at one end;

[0028] Square hole, provided with two, formed at equal angles in the inner pipe, the square hole is slidingly inserted into the square rod two;

[0029] Arc hole, formed in the inner pipe and communicated with the square hole, the inner arc hole is slidingly inserted into the bevel ring block;

[0030] Square block one, provided with two, fixed on the inner wall of the arc hole at equal angles;

[0031] Ring frame three, fixed between the outer wall of the two square blocks one, and slidingly inserted into the bevel ring block.

[0032] Preferably, the lifting mechanism comprises:

[0033] Telescopic rod, provided with two, fixed at equal angles with the inner wall of the protective shell;

[0034] Ring frame four, fixed between the two telescopic rods at one end;

[0035] The second electric push rod is fixed to the inner wall of the protective shell, and one end of the second electric push rod is rotationally connected with a placing table.

[0036] Preferably, the rotating mechanism comprises:

[0037] The motor is fixed to the outer wall of the sliding rod of one of the telescopic rods, and the rotating shaft of the motor is fixedly connected with a straight gear;

[0038] The gear ring is fixed to the inner wall of the placing table, and the gear ring is in meshing transmission with the straight gear.

[0039] Compared with the prior art, the utility model has the advantages that:

[0040] 1. The internal structure of the pipe can be quickly changed by the first electric push rod, from overall flushing to local flushing, and the original liquid can enter the conical shell along the circular pipe and be sprayed out of the circular hole to perform local flushing test on the water inlet. Compared with single-direction flushing of the water inlet, it is difficult to reach some corners and recessed parts, but the surrounding flushing of the water inlet can ensure that the water flow impacts the inner wall from various angles, accurately detects the wear condition of each tiny area of the inner wall, more accurately judges the durability of the water inlet material when coping with internal fluid impact, screens out materials more suitable for complex internal flow field environment, multi-angle water flow impact of internal flushing can accelerate the erosion of the material at these defects, discover potential hazards in advance, improve water inlet use safety, and reduce production accident risk.

[0041] 2. The first electric push rod can not only change the internal structure of the pipe to flush the inner wall of the water inlet, but also change other structures of the pipe, so that the water inlet can be internally flushed while the outer wall of the water inlet is surrounded and flushed. Compared with the prior art which focuses on limited-angle flushing of the outer wall, the surrounding flushing can fully reflect the multi-directional erosion risk of the outer wall in actual use, can consider the outer wall loss under the combined influence of multiple factors such as slag splashing, high-temperature gas flow flushing, and surrounding environmental medium corrosion, is helpful to develop outer wall protective coating or material with stronger pertinence, and can detect the wear difference of the outer wall at different stress points through all-around external flushing, which is of great significance for judging the deformation and cracking tendency of the overall structure of the water inlet after long-term erosion, ensuring that the water inlet not only has durable material, but also has stable structure under complex external environment, and ensuring production continuity.

[0042] 3. By driving the lifting mechanism and the rotating mechanism, the liquid sprayed in the inner and outer local flushing mechanism can flush every position of the water gap, so that the performance detection is more detailed, whether it is the key flow channel area of the inner wall impacted by molten steel or the protective layer surface of the outer wall resisting slag, airflow and corrosion medium, which can be covered in all directions, and the complete anti-erosion data of the inner and outer walls under complex working conditions can be obtained at one time, and the accuracy of the water gap erosion test is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 is the overall structure schematic diagram of the utility model;

[0044] Figure 2 is the internal structure schematic diagram of the protective shell in the utility model;

[0045] Figure 3 is the cross section structure schematic diagram of the inner and outer local flushing mechanism in the utility model;

[0046] Figure 4 is the local cross section structure schematic diagram of the inner and outer local flushing mechanism in the utility model;

[0047] Figure 5 is the pipe cross section structure schematic diagram in the utility model;

[0048] Figure 6 is the inclined surface ring block structure schematic diagram in the utility model;

[0049] Figure 7 is the lifting mechanism and the rotating mechanism structure schematic diagram in the utility model.

[0050] In the drawing: 100, water gap anti-erosion test mechanism; 110, protective shell; 111, ring frame one; 200, inner and outer local flushing mechanism; 210, square rod one; 211, U-shaped frame; 212, electric push rod one; 213, cover plate; 214, ring frame two; 215, square groove; 220, pipe; 221, ring groove; 222, square hole; 223, arc-shaped hole; 224, square block one; 225, ring frame three; 230, round rod; 231, arc-shaped plate; 232, round pipe; 233, conical shell; 234, round hole; 240, square rod two; 241, square block two; 242, inclined surface ring block; 300, lifting mechanism; 310, electric push rod two; 311, telescopic rod; 312, ring frame four; 320, placing table; 400, rotating mechanism; 410, motor; 411, straight gear; 420, gear ring; 500, clamping mechanism. DETAILED DESCRIPTION

[0051] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0052] Please refer to Figures 1-7 In the embodiments of the present application, a water gap erosion resistance testing device includes a water gap erosion resistance testing mechanism 100, which includes a protective shell 110 and the following parts: an inside and outside local erosion mechanism 200 is fixed inside the protective shell 110 at the upper position, can change the erosion form according to the requirements, and a lifting mechanism 300 is fixed to the bottom of the protective shell 110, which can drive the water gap to rise and fall. The ring frame one 111 is fixed between the inner wall of the protective shell 110 and the lifting mechanism 300, which can seal the lifting mechanism 300 to prevent the original liquid from seeping into the inside. The rotating mechanism 400 is fixed on the lifting mechanism 300, which can drive the water gap to rotate. The clamping mechanism 500 is fixed on the lifting mechanism 300. The inside and outside local erosion mechanism 200 includes the following parts: two square rods one 210 are provided, which are fixed at equal angles with the inner wall of the protective shell 110. The U-shaped frame 211 is fixed between the outer walls of the two square rods one 210. The electric push rod one 212 is fixedly connected to the outer wall of the U-shaped frame 211. The cover plate 213 is fixed to one end of the electric push rod one 212. The pipe 220 is fixed between the outer walls of the two square rods one 210. The annular groove 221 is formed in the top of the pipe 220. The ring frame two 214 is fixed to the outer wall of one side of the cover plate 213. The outer wall of the ring frame two 214 is inserted and matched with the inside of the annular groove 221. The round rod 230 is provided with two, which are fixed on the outer wall of one side of the cover plate 213 at equal angles. The arc-shaped plate 231 is fixed between the outer walls of one end of the two round rods 230. The circular tube 232 is fixedly connected to the center of the arc-shaped plate 231. The conical shell 233 is fixed to one end of the circular tube 232. A plurality of circular holes 234 are formed in the outer wall of the conical shell 233 at equal angles around the axis. The structure inside the pipe 220 can be quickly changed from overall erosion to local erosion by driving the electric push rod one 212. The original liquid can enter the conical shell 233 along the circular tube 232 and be sprayed from the circular hole 234 to test the local erosion of the water gap inside.

[0053] The internal and external partial flushing mechanism 200 includes the following parts: two square grooves 215 are provided, opened at equal angles on one side of the outer wall of the cover plate 213; two square rods 240 are provided, sliding at equal angles on the outer wall of the cover plate 213; a square block 241 is fixedly connected to the outer wall of the square rod 240, and the outer wall of the square block 241 is inserted into the cover plate 213; its inclined ring block 242 is fixed between the outer walls of one end of the two square rods 240; two square holes 222 are provided, opened at equal angles inside the pipe 220, and the square holes 222 are slidably inserted into the square rods 240; and its arc-shaped hole 223 is... Located inside the pipe 220 and communicating with the square hole 222, the arc-shaped hole 223 is slidably inserted into the inclined ring block 242. Two square blocks 224 are provided and fixed at equal angles on the inner wall of the arc-shaped hole 223. The ring frame 225 is fixed between the outer walls of the two square blocks 224 and slidably inserted into the inclined ring block 242. Driven by the electric push rod 212, it can not only change the internal structure of the pipe 220 to flush the inner wall of the water outlet, but also change other structures of the pipe 220 so that while flushing the inside of the water outlet, it can also flush the outer wall of the water outlet in a surrounding manner.

[0054] The lifting mechanism 300 includes the following parts: it has two telescopic rods 311, which are fixed at equal angles to the inner wall of the protective shell 110, and the ring frame 312 is fixed between one end of the two telescopic rods 311. The electric push rod 310 is fixed to the inner wall of the protective shell 110. A placement platform 320 is rotatably connected to one end of the electric push rod 310. The outer wall of the placement platform 320 is rotatably connected to the ring frame 312. The rotating mechanism 400 includes the following parts: its motor 410 is fixed to the outer wall of the slide of one of the telescopic rods 311. A spur gear 411 is fixedly connected to the rotating shaft of the motor 410. Its gear ring 420 is fixed to the inner wall of the placement platform 320. The gear ring 420 meshes with the spur gear 411 for transmission. By driving the lifting mechanism 300 and the rotating mechanism 400, the original liquid sprayed in the internal and external local flushing mechanism 200 can be flushed at every position of the water inlet, making the performance test more detailed.

[0055] Specifically, in operation, the personnel places the nozzle on the lifting mechanism 300, and fixes the nozzle by driving the clamping mechanism 500, and tests the original liquid flowing into the pipe 220 through the pipeline, and flows out of the pipe 220 through the inside of the ring frame three 225, and performs overall flushing performance test on the nozzle clamped by the clamping mechanism 500 below, when it is necessary to perform local flushing test on the inner wall of the nozzle, the electric push rod one 212 drives the cover plate 213 to move downward, so that the arc plate 231 is separated from the one end of the pipe 220, and moves downward to the port of the ring frame three 225, and is attached to the inner wall of the ring frame three 225, and seals the ring frame three 225, after the original liquid flows into the pipe 220, it reaches the arc plate 231, flows into the circular pipe 232 through the inclined surface, and is sprayed out through the circular hole 234 on the conical shell 233, while the electric push rod one 212 drives to adjust the position of the conical shell 233, the cover plate 213 moves downward and slides with the square rod two 240, one end of the square rod two 240 is separated from the cover plate 213, and the inclined surface ring block 242 slides downward to the lowest end along the inside of the arc-shaped hole 223 under the action of gravity, so that both ends of the arc-shaped hole 223 are exposed, when the cover plate 213 moves downward and contacts the square block two 241, the current position of the inclined surface ring block 242 can be limited, at the same time, the ring frame two 214 on the cover plate 213 is inserted into the ring groove 221, and seals one end of the pipe 220, when the original liquid flows into the pipe 220, part of it flows into the conical shell 233, and the other part flows into the arc-shaped hole 223 through one end, and flows out through the other end, and performs surrounding flushing on the outside of the nozzle, while flushing the inside and outside of the nozzle, the electric push rod two 310 drives the placement table 320 to move upward, and the motor 410 drives the spur gear 411 to rotate and engage with the gear ring 420, drives the placement table 320 to rotate, drives the nozzle clamped on the clamping mechanism 500 to rotate, and can quickly adjust the flushing position of the nozzle.

[0056] Embodiment one

[0057] As Figures 2-5As shown, in the embodiment, the internal and external partial flushing mechanism 200 comprises the following parts: two square rods one 210 are arranged on the inner wall of the protective shell 110 at equal angles, and a U-shaped frame 211 is fixed between the outer walls of the two square rods one 210, an electric push rod one 212 is fixedly connected to the outer wall of the U-shaped frame 211, a cover plate 213 is fixed to one end of the electric push rod one 212, a pipe 220 is fixed between the outer walls of the two square rods one 210, an annular groove 221 is formed at the top of the pipe 220, a ring frame two 214 is fixed to the outer wall of one side of the cover plate 213, the outer wall of the ring frame two 214 is inserted and matched with the inner part of the annular groove 221, two round rods 230 are arranged on the outer wall of one side of the cover plate 213 at equal angles, an arc-shaped plate 231 is fixed between the outer walls of one end of the two round rods 230, a circular tube 232 is fixedly connected to the center of the arc-shaped plate 231, and a conical shell 233 is fixed to one end of the circular tube 232, a plurality of circular holes 234 are formed on the outer wall of the conical shell 233 at equal angles around the axis.

[0058] In the embodiment, when the internal and external partial flushing mechanism 200 is needed to test the partial flushing of the inner wall of the water gap, the electric push rod one 212 drives the cover plate 213 to move downward, so that the arc-shaped plate 231 is separated from one end of the pipe 220, and moves downward to the port of the ring frame three 225 and is attached to the inner wall of the ring frame three 225 to seal the ring frame three 225. After the original liquid flows into the pipe 220, it reaches the arc-shaped plate 231, flows into the circular tube 232 through the inclined surface, and is sprayed out through the circular holes 234 on the conical shell 233. The structure inside the pipe 220 can be quickly changed by the electric push rod one 212, from overall flushing to partial flushing. The original liquid can enter the conical shell 233 through the circular tube 232, and is sprayed out from the circular holes 234 to test the partial flushing of the internal water gap. Compared with single-direction flushing of the internal water gap, it is difficult to reach some corners and recessed parts, but the surrounding flushing of the internal water gap can ensure that the water flow impacts the inner wall from various angles, accurately detects the wear condition of each tiny area of the inner wall, more accurately judges the durability of the water gap material when dealing with internal fluid impact, selects materials that are more suitable for complex internal flow field environment, multi-angle water flow impact for internal flushing can accelerate the erosion of materials at these defects, discover potential hazards in advance, improve the safety of the water gap, and reduce the risk of production accidents.

[0059] As Figures 5-6As shown, in the embodiment, the internal and external partial flushing mechanism 200 comprises the following parts: the square groove 215 is provided with two, equiangularly arranged on the outer wall of the cover plate 213, and the square rod two 240 is provided with two, equiangularly sliding on the outer wall of the cover plate 213, the square rod two 240 is fixedly connected with the square block two 241 on the outer wall, the square block two 241 is inserted and matched with the cover plate 213 inside, the bevel ring block 242 is fixed between the outer wall of one end of the two square rod two 240, the square hole 222 is provided with two, equiangularly arranged inside the pipe 220, and the square hole 222 is slidingly inserted with the square rod two 240, the arc hole 223 is arranged inside the pipe 220 and communicates with the square hole 222, and the arc hole 223 is slidingly inserted with the bevel ring block 242 inside, the square block one 224 is provided with two, equiangularly fixed on the inner wall of the arc hole 223, and the ring frame three 225 is fixed between the outer wall of the two square block one 224 and slidingly inserted with the bevel ring block 242.

[0060] In specific implementation, while the electric push rod one 212 drives the adjustment of the position of the conical shell 233, the cover plate 213 moves downward and slides with the square rod two 240, one end of the square rod two 240 is separated from the cover plate 213, and the bevel ring block 242 slides downward along the arc hole 223 inside to the lowest end under the influence of gravity, so that both ends of the arc hole 223 are exposed, when the cover plate 213 moves downward and contacts with the square block two 241, the current position of the bevel ring block 242 can be limited, at the same time, the ring frame two 214 on the cover plate 213 is inserted with the ring groove 221 to seal one end of the pipe 220, when the raw liquid flows into the pipe 220, part of it flows into the conical shell 233, and the other part flows in through one end of the arc hole 223 and flows out through the other end, so as to surround the water outlet outside for flushing, through the driving of the electric push rod one 212, not only the internal structure of the pipe 220 can be changed to flush the inner wall of the water outlet, but also other structures of the pipe 220 can be changed, so that the water outlet can be flushed from the inside and the outer wall at the same time, compared with the prior art which focuses on flushing the outer wall at a limited angle and cannot fully reflect the multi-directional erosion risk of the outer wall in actual use, the surrounding flushing can act on the outer wall in all directions and can consider the outer wall loss under the influence of multiple factors such as slag splashing, high-temperature gas flow flushing and surrounding environmental medium corrosion, which is helpful to develop a more targeted outer wall protection coating or material, and the all-directional external flushing can detect the wear difference of the outer wall at different stress points, which is of great significance to judge the deformation and cracking tendency of the overall structure of the water outlet after long-term erosion, to ensure that the water outlet not only has durable material but also stable structure under complex external environment, and to ensure the production continuity.

[0061] Embodiment two

[0062] As Figure 7As shown, in the embodiment, the lifting mechanism 300 comprises the following parts: two telescopic rods 311 are arranged equiangularly and fixed to the inner wall of the protective shell 110, the ring frame four 312 is fixed between the ends of the two telescopic rods 311, the electric push rod two 310 is fixed to the inner wall of the protective shell 110, the placement table 320 is rotatably connected to the end of the electric push rod two 310, and the outer wall of the placement table 320 is rotatably connected with the ring frame four 312. The rotating mechanism 400 comprises the following parts: the motor 410 is fixed to the outer wall of the slide rod of one of the telescopic rods 311, the spur gear 411 is fixedly connected to the rotating shaft of the motor 410, the gear ring 420 is fixed to the inner wall of the placement table 320, and the gear ring 420 is in meshing transmission with the spur gear 411.

[0063] In specific implementation, while the inner and outer local flushing mechanism 200 flushes the water gap, the electric push rod two 310 drives the placement table 320 to move, the motor 410 drives the spur gear 411 to rotate and mesh with the gear ring 420, the placement table 320 is driven to rotate, and the water gap clamped on the clamping mechanism 500 is driven to rotate, so that the flushing position of the water gap can be quickly adjusted. By driving the lifting mechanism 300 and the rotating mechanism 400, the liquid sprayed in the inner and outer local flushing mechanism 200 can flush every position of the water gap, the performance detection is more detailed, whether it is the key flow channel region of the inner wall impacted by molten steel or the protective layer of the outer wall resisting slag, airflow and corrosion medium, it can be covered in all directions, and the complete anti-flushing data of the inner and outer walls under complex working conditions can be obtained at one time, and the accuracy of the water gap flushing test is effectively improved.

[0064] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be considered as limiting the claims to which they relate.

[0065] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A device for testing the resistance to erosion of a nozzle, characterized in that it comprises: The utility model relates to a water gap anti-scour test mechanism (100) including a protective shell (110), an inside and outside local scour mechanism (200) is fixed in the inside upper portion of protective shell (110) can change the scour form according to the requirement, a lifting mechanism (300) is fixed in the bottom of protective shell (110) can drive water gap to lift, a ring frame one (111) is fixed between the inner wall of protective shell (110) and lifting mechanism (300) can seal lifting mechanism (300) prevents the raw liquid from seeping into the inside, a rotating mechanism (400) is fixed on lifting mechanism (300) can drive water gap to rotate, a clamping mechanism (500) is fixed on lifting mechanism (300). The inside and outside local scour mechanism (200) includes two square bars one (210) are arranged, equal angle and the inner wall of protective shell (110) are fixed, a U-shaped frame (211) is fixed between the outer wall of two square bars one (210), and the outer wall of U-shaped frame (211) is fixedly connected with electric push rod one (212), a cover plate (213) is fixed at one end of electric push rod one (212). The inside and outside local scour mechanism (200) includes a pipe (220) is fixed between the outer wall of two square bars one (210), and the top of pipe (220) is provided with a ring groove (221), a ring frame two (214) is fixed at the outer wall of one side of cover plate (213), and the outer wall of ring frame two (214) is insertedly matched with the inside of ring groove (221). The inside and outside local scour mechanism (200) includes two round bars (230) are arranged, equal angle and are fixed on the outer wall of one side of cover plate (213), an arc plate (231) is fixed between the outer wall of one end of two round bars (230), and the arc plate (231) is fixedly connected with a circular tube (232) at the center, a conical shell (233) is fixed at one end of circular tube (232), and the outer wall of conical shell (233) is provided with a plurality of round holes (234) around the axis at equal angles. The inside and outside local scour mechanism (200) includes two square grooves (215) are arranged, equal angle and are provided on the outer wall of one side of cover plate (213), two square bars two (240) are arranged, equal angle and slide on the outer wall of cover plate (213), and the outer wall of square bar two (240) is fixedly connected with square block two (241), and the outer wall of square block two (241) is insertedly matched with the inside of cover plate (213), a bevel ring block (242) is fixed between the outer wall of one end of two square bars two (240), two square holes (222) are arranged, equal angle and are provided in the inside of pipe (220), and the square hole (222) is slidably inserted with square bar two (240), an arc-shaped hole (223) is provided in the inside of pipe (220) and communicates with square hole (222), and the inside of arc-shaped hole (223) is slidably inserted with bevel ring block (242), two square blocks one (224) are arranged, equal angle and are fixed on the inner wall of arc-shaped hole (223), a ring frame three (225) is fixed between the outer wall of two square blocks one (224) and slidably inserted with bevel ring block (242). The lifting mechanism (300) includes ​ 2. The device for testing the resistance to erosion of a nozzle according to claim 1, characterized in that, ​ ​ ​ ​ 3. The device for testing the resistance to erosion of a nozzle according to claim 2, characterized in that, ​ ​ ​ 4. The device for testing the resistance to erosion of a nozzle according to claim 3, characterized in that, ​ ​ ​ ​ 5. The device for testing the resistance to erosion of a nozzle according to claim 4, characterized in that, ​ ​ ​ ​ ​ ​ ​ ​ 6. The device for testing the resistance to erosion of a nozzle according to claim 5, characterized in that, ​ Two telescopic rods (311) are arranged equiangularly and fixed to the inner wall of the protective shell (110); A ring frame four (312) is fixed between the two ends of the two telescopic rods (311); An electric push rod two (310) is fixed to the inner wall of the protective shell (110), and one end of the electric push rod two (310) is rotatably connected with a placing table (320), and the outer wall of the placing table (320) is rotatably connected with the ring frame four (312).

7. The device for testing the resistance to erosion of a nozzle according to claim 6, characterized in that, The rotating mechanism (400) comprises: A motor (410) is fixed to the outer wall of the slide rod of one of the telescopic rods (311), and the rotating shaft of the motor (410) is fixedly connected with a spur gear (411); A gear ring (420) is fixed to the inner wall of the placing table (320), and the gear ring (420) is in meshing transmission with the spur gear (411).

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