Rotary single-nozzle test experiment device

Abstract

A rotary single-nozzle test experiment device comprises a submerging mechanism which is provided with a water tank for containing liquid and a clamp holder arranged in the water tank, and the clamp holder can clamp a test sample; the jet flow mechanism is provided with a jet flow driver and a jet flow structure connected with the jet flow driver, and the jet flow structure can extend into the water tank; the three-axis moving mechanism is provided with a plane moving structure and a vertical moving structure, the vertical moving structure can be horizontally and movably arranged in the plane moving structure, and the jet flow mechanism can be vertically and movably arranged through the vertical moving structure. According to the rotary single-nozzle test experiment device, the purposes that an underground submerging scene is truly simulated, and the influence of factors such as the spraying distance, the jet flow water pressure and the jet flow rotating speed on the water jet flow technology can be tested are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of high-pressure water jet rock breaking, and in particular to a rotating single nozzle test experimental device. Background Art

[0002] The description in this section merely provides background information related to the present disclosure and does not constitute prior art.

[0003] During continuous tubing operations in the field of oil and gas wells, since the pipelines transport media such as oil and gas, which are rich in organic matter, H2S, CO2 and other ions, bacteria and other impurities, it is easy to scale under high temperature and other conditions, resulting in pipeline diameter reduction, smaller flow area, hydraulic loss, reduced displacement and pipeline blockage.

[0004] High-pressure water jet technology is a technology that uses boosting equipment to compress liquid and then spray it out at high speed through a nozzle to form a high-energy jet. Using a continuous pipe as a transmission carrier and high-pressure water jet technology can achieve efficient and low-cost removal of downhole blockages. However, unlike the application in ground pipelines, the use of high-pressure water jet technology has no restrictions on the displacement and pressure of supporting equipment. The continuous pipe is used as a channel for conveying fluids. Due to the small pipe diameter, long conveying distance and limited pressure bearing capacity, the displacement and pressure of the conveyed liquid are limited, requiring the use of the smallest possible operating displacement and pressure to complete the operation. Therefore, a downhole operation tool with a self-rotating jet outlet is proposed, that is, a single nozzle is used to meet the high flow rate under small displacement, and at the same time, the single nozzle is rotated along the axis to achieve full coverage of the cleaning area of ​​the entire radial area of ​​the oil pipe.

[0005] In this regard, it is necessary to simulate the underground flooding state to better restore the real working environment, and conduct indoor tests on the jet velocity, rotation velocity, and lowering velocity of the rotating single nozzle to guide the design of underground working tools and construction parameters. At present, there is no systematic test method and supporting test bench for the rotating single nozzle. Conventional jet benches use the nozzle direct injection method, which is difficult to simulate the treatment of wellbore blockages under real underground mobile working conditions.

[0006] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present invention and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the present invention. Summary of the invention

[0007] The purpose of the present invention is to provide a rotating single nozzle test experimental device, which can simulate the working condition of high-speed rotation of the drilling tool downhole during drilling, and provide a basis for the rock breaking ability of sand-containing fluids and the spray type testing of various jet tools.

[0008] The above-mentioned implementation objectives of the present invention are mainly achieved by the following technical solutions:

[0009] The present invention provides a rotating single nozzle test experimental device, comprising:

[0010] A flooding mechanism, comprising a water tank for containing liquid and a clamp disposed in the water tank, wherein the clamp can clamp the test sample;

[0011] A jet mechanism, comprising a jet driver and a jet structure connected to the jet driver, wherein the jet structure can extend into the water tank;

[0012] The three-axis moving mechanism has a planar moving structure and a vertical moving structure. The vertical moving structure can be arranged horizontally movably in the planar moving structure, and the jet mechanism can be arranged vertically movably through the vertical moving structure.

[0013] In a specific embodiment, the water tank includes a flooding box and a support box connected to each other, the clamp is arranged in the support box, and the inner cavity of the flooding box and the inner cavity of the support box are connected to form a containing cavity for containing liquid.

[0014] Wherein, the bottom and side wall of the water tank are respectively provided with drain ports, and the drain ports are connected with recovery pipes.

[0015] In a specific embodiment, the jet mechanism includes a rotatable injection pipe, the injection structure has a guide rod and a nozzle detachably connected to the guide rod, and the injection structure is connected to the injection pipe.

[0016] Wherein, a splash guard is sleeved on the guide rod, and the splash guard is arranged close to the nozzle.

[0017] Wherein, the jet mechanism includes a shell and a motor located in the shell, the injection pipe is connected to the output shaft of the motor through a transmission structure, one end of the injection pipe passing through the shell is covered with a pressure joint, and the other end of the injection pipe passing through the shell is sleeved with a bearing cover.

[0018] Wherein, there is a gap between the pressure joint and the injection pipe.

[0019] In a specific embodiment, the planar moving structure has an X-axis slide rail and a Y-axis slide rail, and the Y-axis slide rail is movably arranged on the X-axis slide rail; the vertical moving structure has a Z-axis slide rail, and the Z-axis slide rail is movably arranged on the Y-axis slide rail, and the jet mechanism is vertically movably connected to the Z-axis slide rail.

[0020] In a specific embodiment, a water tank sliding base is further included, and the water tank is horizontally movably arranged on the water tank sliding base.

[0021] In a specific embodiment, a gantry crane is further included, and the gantry crane can be moved above the water tank.

[0022] Compared with the prior art, the technical solution of the present invention has the following characteristics and advantages:

[0023] 1. When performing downhole operations, the pipe is filled with liquid. Therefore, compared with the jet experiment in the air, the submerged jet has a smaller contraction angle under the wrapping of water and is more concentrated, which is obviously different. The present invention provides a test platform under submerged conditions, which can simulate the actual situation downhole, obtain more accurate test data, and provide test guarantee for downhole oil pipe jet descaling.

[0024] 2. The present invention provides three degrees of freedom in XYZ directions, can realize three-axis linkage, precise positioning, and provide a higher degree of freedom guarantee for simulated downhole fixed-point testing and dynamic-point testing. When performing jet experiments on specific materials such as scale sample pipes, the nozzle can be moved arbitrarily in the pipe, simulating the eccentric injection experiment when the nozzle may not be able to maintain the center of the pipe during jet descaling.

[0025] 3. The testing device provided by the present invention can measure the main design parameters of the rotating single nozzle including the minimum jet velocity, the minimum rotation speed and the optimal drilling speed through a reasonable working method. At the same time, the device has a high degree of integration and can quickly test and measure these parameters, providing rapid testing capabilities for tool development and improving overall testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the rotating single nozzle test experimental device of the present invention;

[0027] Figure 2 A front view of a water tank of the rotating single nozzle test experimental device of the present invention;

[0028] Figure 3 A side view of a water tank of a rotating single nozzle test experimental device of the present invention;

[0029] Figure 4 A top view of a water tank of a rotating single nozzle test experimental device of the present invention;

[0030] Figure 5 A cross-sectional view of a jet driver of a rotating single nozzle test experimental device of the present invention;

[0031] Figure 6 A front view of a jet driver of a rotating single nozzle test experimental device of the present invention;

[0032] Figure 7 It is a front view of the injection structure of the rotating single nozzle test experimental device of the present invention;

[0033] Figure 8 It is a cross-sectional view of a water tank during a simulated oil pipe descaling experiment of the rotating single nozzle test experimental device of the present invention.

[0034] Description of Figure Numbers:

[0035] 1. Submergence mechanism; 11. Water tank; 111. Submergence box; 112. Bracket box; 113. Accommodation chamber; 12. Clamp; 13. Scale sample tube; 131. Scale body; 14. Drain port; 15. Overflow port; 16. Sliding base; 17. Pulley; 18. Water tank slide rail;

[0036] 2. Fluidic mechanism; 21. Fluidic driver; 211. Injection pipe; 212. Transmission structure; 213. Pressure joint; 214. Bearing gland; 215. Rolling bearing; 216. Bearing sleeve; 217. Bearing cover plate; 218. Sealing gland; 22. Injection structure; 221. Guide rod; 2211. One end; 2212. The other end; 222. Nozzle; 223. Injection joint; 224. Splash shield; 23. Housing; 231. One end; 232. The other end; 24. Motor; 241. Output shaft; 25. Slide tray;

[0037] 3. Three-axis moving mechanism; 31. Planar moving structure; 311. X-axis slide rail; 312. Y-axis slide rail; 32. Vertical moving structure; 321. Z-axis slide rail; 33. Motor;

[0038] 4. Gantry crane. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0040] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention 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.

[0042] like Figure 1 , Figure 4 As shown, the present invention provides a rotating single nozzle test experimental device, comprising:

[0043] The submerging mechanism 1 comprises a water tank 11 for containing liquid and a clamp 12 arranged in the water tank 11, wherein the clamp 12 can clamp the test sample;

[0044] The jet mechanism 2 comprises a jet driver 21 and a jet structure 22 connected to the jet driver 21, and the jet structure 22 can extend into the water tank 11;

[0045] The three-axis moving mechanism 3 has a planar moving structure 31 and a vertical moving structure 32 . The vertical moving structure 32 can be arranged to be horizontally movable in the planar moving structure 31 , and the jet mechanism 2 can be arranged to be vertically movable through the vertical moving structure 32 .

[0046] The rotating single nozzle test experimental device provided by the present invention can simulate the actual situation downhole and obtain more accurate test data, providing experimental guarantee for carrying out downhole oil pipe jet descaling. At the same time, three-axis linkage is realized through the three-axis moving mechanism 3, and the positioning is accurate, which can provide a higher degree of freedom guarantee for simulating downhole fixed-point testing and moving-point testing.

[0047] For details, please refer to Figures 2 to 4 As shown, the water tank 11 of the submerging mechanism 1 is generally in a rectangular shape, and the clamp 12 is located at the lower part of the water tank 11 and is arranged inside the water tank 11. The clamp 12 can clamp test samples including sleeves, rock samples, etc.

[0048] The jet mechanism 2 includes a jet driver 21 mounted on a vertical moving structure 32, and a tubular injection structure 22 connected to the jet driver 21; Figures 5 to 7 As shown, the jet driver 21 includes a rotatable injection pipe 211, and the injection structure 22 has a guide rod 221 and a nozzle 222 detachably connected to the guide rod 221, so as to simulate the scene of a downhole jet tool extending into a casing.

[0049] The three-axis moving mechanism 3 realizes three-degree-of-freedom movement in space through a planar moving structure 31 and a vertical moving structure 32. In the present embodiment, the planar moving structure 31 includes two parallel X-axis rails 311 and a Y-axis rail 312 arranged between the two X-axis rails 311. The Y-axis rail 312 is movably arranged on the two X-axis rails 311. The vertical moving structure 32 includes a Z-axis rail 321, which is movably arranged on the Y-axis rail 312. The fluidic mechanism 2 is vertically movably connected to the Z-axis rail 321. Motors 33 are respectively provided at the ends of the X-axis rail 311, the ends of the Y-axis rail 312 and the ends of the Z-axis rail 321 to control the fluidic mechanism 2 to move according to the set program.

[0050] According to a specific embodiment of the present invention, Figures 1 to 4 As shown, the water tank 11 includes a flooding box 111 and a support box 112 connected to each other, the holder 12 is placed in the support box 112, and the inner cavity of the flooding box 111 and the inner cavity of the support box 112 are connected to form a containing cavity 113 for containing liquid.

[0051] Related References Figure 8 As shown, after the water tank 11 is filled with liquid, it can submerge the test sample, making it convenient for the injection structure 22 to extend into the liquid to perform injection experiments on the test sample, so as to provide a simulation of an underwater construction scene, and more realistically simulate the more concentrated underwater jet rock breaking and scale removal effect caused by the smaller contraction angle of the water flow, thereby providing a more realistic testing environment for the development of multiple models of nozzles 222.

[0052] Specifically, the flooding box 111 is located above the support box 112, and the two are sealed and connected by bolts. The clamp 12 is located in the support box 112 and is clamped by threaded clamping mechanisms on both sides of the support box 112. The clamp 12 is used to clamp the test sample from both sides of the support box 112 to the middle, and the clamp 12 used in the present invention is not limited to this; in this embodiment, the bottom and side walls of the support box 112 are respectively provided with drain ports 14, and the drain ports 14 located at the bottom of the support box 112 are larger in area than the drain ports 14 located on the side walls of the support box 112, and are used to discharge wastewater and residual rock fragments. Further, as Figure 4 As shown, an overflow port 15 is provided on the side wall of the flooding box 111. The drain port 14 and the overflow port 15 can be respectively connected to recovery pipes to recover the waste water in the water tank 11 for recycling.

[0053] According to a specific embodiment of the present invention, Figure 5 and Figure 6As shown, the jet mechanism 2 includes a shell 23 and a motor 24 located in the shell 23, the injection pipe 211 is connected to the output shaft 241 of the motor 24 through a transmission structure 212, one end 231 of the injection pipe 211 passing through the shell 23 is covered with a pressure joint 213, and the other end 232 of the injection pipe 211 passing through the shell 23 is sleeved with a bearing cover 214.

[0054] The jet driver 21 of the jet mechanism 2 is connected to the injection structure 22, and can drive the nozzle 222 of the injection structure 22 to rotate, provide radial tension and circumferential shear force for the jet experiment, more realistically simulate the downhole rotating jet working conditions, more intuitively observe the rock breaking and descaling effects of the rotating jet, and provide a real test scenario for the development of multiple models of nozzles 222.

[0055] For details, please refer to Figure 1 As shown, the shell 23 of the fluidic mechanism 2 has an open end for placing the motor 24 and the transmission structure 212 into its inner cavity, and a slide rail tray 25 is installed at the open end. The fluidic mechanism 2 can be connected to the Z-axis slide rail 321 through the slide rail tray 25. In this embodiment, the motor 24 is fixedly connected to the slide rail tray 25, and the transmission structure 212 is a gear transmission structure. The output shaft 241 of the motor 24 cooperates with the injection pipe 211 through the gear transmission structure to drive the injection pipe 211 to rotate. Rolling bearings 215 are respectively provided at both ends of the injection pipe 211, which can be fixed on the slide rail tray 25 with a bearing sleeve 216 or a bearing cover plate 217. At the same time, the two ends of the injection pipe 211 are sealed by a bearing gland 214 and a sealing gland 218. The pressure joint 213 is fixed to the shell 23 by screws. There is a gap between the pressure joint 213 and the injection pipe 211, which can make the liquid flow into the injection pipe 211 when the injection pipe 211 rotates; in other embodiments, a servo motor can also be used to directly connect the injection pipe 211 to drive the injection pipe 211 to rotate. This embodiment is not reflected in the accompanying drawings, but the driving method is not limited to this.

[0056] like Figures 5 to 7 As shown, a tapered thread is provided inside one end of the injection pipe 211, and the tapered thread is used to connect the injection joint 223 of one end 2211 of the guide rod 221. The other end 2212 of the guide rod 221 is provided with a thread for loading and unloading various types of nozzles 222. The outer side of the other end 2212 of the guide rod 221 is threadedly sleeved with a funnel-shaped splash cover 224 to prevent liquid from splashing back.

[0057] According to a specific embodiment of the present invention, Figure 1 As shown, the rotating single nozzle test experimental device also includes a sliding base 16, and the water tank 11 can be horizontally movably arranged on the sliding base 16; further, the rotating single nozzle test experimental device also includes a gantry crane 4, and the gantry crane 4 can be moved to the top of the water tank 11.

[0058] Through the water tank 11, the sliding base 16 and the gantry crane 4, the test sample can be replaced conveniently and quickly. At the same time, through the cooperation of the water tank 11, the sliding base 16 and the three-axis moving mechanism 3, the equipment can be placed in a three-dimensional manner to maximize the use of space and save the overall space occupied by the device.

[0059] For details, please refer to Figures 2 to 4 As shown, in this embodiment, the sliding base 16 includes a water tank slide rail 18, and a pulley 17 is respectively provided at the four corners of the bottom of the water tank 11. The pulley 17 cooperates with the water tank slide rail 18 to enable the water tank 11 to move horizontally on the sliding base 16.

[0060] In order to more clearly reveal the test objectives and specific test process that can be obtained when the rotating single nozzle test experimental device provided by the present invention is carried out, the following will cooperate with Figure 1 and Figure 8 , for detailed description:

[0061] Example 1: The rotary single nozzle test experimental device of the present invention is used to test the jet descaling in the oil pipe to determine the minimum jet velocity.

[0062] First, the gantry crane 4 is used to cut the scale sample tube 13 to be tested into sections and hoist them into the water tank 11, and the scale sample tube 13 is locked by the clamp 12, wherein the scale sample tube 13 is a standard petroleum oil pipe short section (2-3 / 8" oil pipe) with an inner diameter of 49mm and a scale body 131 thickness of 7.3±0.7mm.

[0063] Furthermore, the pressure joint 213 of the jet mechanism 2 is connected to the high-pressure water pipe, the guide rod 221 is installed with a side spray nozzle 222, the water tank 11 is filled with liquid to submerge the scale sample tube 13, and the nozzle 222 is lowered to the processing starting position through the three-axis moving mechanism 3. At this time, the experimental parameters are set: the spray distance is 24.5mm, the falling speed of the nozzle 222 is 5mm / s, the rotation speed of the jet mechanism 2 is 60rpm, and the jet speed is 150m / s.

[0064] Start the rotating single nozzle test experimental device, and the nozzle 222 starts to spray. After waiting for 8 minutes, stop the test. Remove the scale sample tube 13 section that has completed the test, and replace it with the scale sample tube 13 section to be tested. When other experimental parameters remain unchanged, set the jet velocity in the experimental parameters to 200m / s or 250m / s for the experiment respectively.

[0065] After the experiment was completed, the three sections of the scale sample pipe 13 under the three jet velocity experiments were cut into sections for comparison, and the crushing of the scale body 131 was observed. At this time, it was observed that when the jet velocity was set to 150m / s, there were cracks and erosion pits on the surface of the scale body 131, but the scale body 131 did not fall off. At the same time, it was observed that the scale body 131 completely fell off when the jet velocity was ≥200m / s. It can be determined that the minimum jet velocity for the current coiled tubing jet descaling is 200m / s.

[0066] Example 2: The rotary single nozzle test experimental device of the present invention is used to test the jet descaling in the oil pipe to determine the minimum rotation speed.

[0067] First, the gantry crane 4 is used to cut the scale sample tube 13 to be tested into sections and hoist them into the water tank 11, and the scale sample tube 13 is locked by the clamp 12, wherein the scale sample tube 13 is a standard petroleum oil pipe short section (2-3 / 8" oil pipe) with an inner diameter of 49mm and a scale body 131 thickness of 7.3±0.7mm.

[0068] Furthermore, the pressure joint 213 of the jet mechanism 2 is connected to the high-pressure water pipe, the guide rod 221 is installed with a side spray nozzle 222, the water tank 11 is filled with liquid to submerge the scale sample tube 13, and the nozzle 222 is lowered to the processing starting position through the three-axis moving mechanism 3. At this time, the experimental parameters are set: the spray distance is 24.5mm, the falling speed of the nozzle 222 is 5mm / s, the jet speed is 200m / s, and the rotation speed of the jet mechanism 2 is 30rpm.

[0069] Start the rotating single nozzle test experimental device, the nozzle 222 starts to spray, and the test is stopped after waiting for 8 minutes. Remove the scale sample tube 13 section that has completed the test, and replace it with the scale sample tube 13 section to be tested. When other experimental parameters remain unchanged, set the speed of the jet mechanism 2 in the experimental parameters to 60rpm or 90rpm for the experiment respectively.

[0070] After the experiment was completed, the three sections of the scale sample pipe 13 under the rotation speed test of the three jet mechanisms 2 were cut into sections for comparison, and the crushing of the scale body 131 was observed. At this time, it was observed that when the rotation speed was 30rpm, some scale bodies 131 on the pipe wall had not been cleaned up. At the same time, it was observed that when the rotation speed was ≥30rpm, the scale body 131 was completely cleaned up. It can be determined that the minimum rotation speed of the current coiled tubing jet descaling is 60rpm.

[0071] Example 3: The rotary single nozzle test experimental device of the present invention is used to test the jet descaling in the oil pipe to determine the optimal drilling speed.

[0072] First, the gantry crane 4 is used to cut the scale sample tube 13 to be tested into sections and hoist them into the water tank 11, and the scale sample tube 13 is locked by the clamp 12, wherein the scale sample tube 13 is a standard petroleum oil pipe short section (2-3 / 8" oil pipe) with an inner diameter of 49mm and a scale body 131 thickness of 7.3±0.7mm.

[0073] Furthermore, the pressure joint 213 of the jet mechanism 2 is connected to the high-pressure water pipe, the guide rod 221 is installed with a side spray nozzle 222, the water tank 11 is filled with liquid to submerge the scale sample tube 13, and the nozzle 222 is lowered to the processing starting position through the three-axis moving mechanism 3. At this time, the experimental parameters are set: the spray distance is 24.5mm, the falling speed of the nozzle 222 is 15mm / s, the jet speed is 200m / s, and the rotation speed of the jet mechanism 2 is 60rpm.

[0074] Start the rotating single nozzle test experimental device, the nozzle 222 starts to spray, and the test is stopped after waiting for 8 minutes. Remove the scale sample tube 13 section that has completed the test, and replace it with the scale sample tube 13 section to be tested. When other experimental parameters remain unchanged, set the falling speed of the nozzle 222 to 10mm / s or 5mm / s to conduct experiments respectively.

[0075] After the experiment was completed, the three sections of the scale sample pipe 13 under the three drilling speed experiments were cut and compared to observe the crushing of the scale body 131. At this time, it was observed that when the drilling speed was 15 and 10 mm / s, there was a local scale body 131 on the pipe wall that had not been cleaned up. At the same time, it was observed that when the rotation speed was ≤5 mm / s, the scale body 131 was completely cleaned up. It can be determined that the optimal drilling speed for the current coiled tubing jet descaling is 5 mm / s.

[0076] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rotating single nozzle test experimental device, characterized in that: include: A flooding mechanism, comprising a water tank for containing liquid and a clamp disposed in the water tank, wherein the clamp can clamp the test sample; A jet mechanism, comprising a jet driver and a jet structure connected to the jet driver, wherein the jet structure can extend into the water tank; The three-axis moving mechanism has a planar moving structure and a vertical moving structure. The vertical moving structure can be arranged horizontally movably in the planar moving structure, and the jet mechanism can be arranged vertically movably through the vertical moving structure.

2. The rotating single nozzle test experimental device according to claim 1, characterized in that: The water tank comprises a flooding box and a support box connected to each other, the clamp is arranged in the support box, and the inner cavity of the flooding box and the inner cavity of the support box are connected to form a containing cavity for containing liquid.

3. The rotating single nozzle test experimental device according to claim 1 or 2, characterized in that: The bottom and the side wall of the water tank are respectively provided with drain ports, and the drain ports are connected with recovery pipes.

4. The rotating single nozzle test experimental device according to claim 1, characterized in that: The jet mechanism comprises a rotatable injection pipe, the injection structure comprises a flow guide rod and a nozzle detachably connected to the flow guide rod, and the injection structure is connected to the injection pipe.

5. The rotating single nozzle test experimental device according to claim 4, characterized in that: A splash guard is sleeved on the guide rod, and the splash guard is arranged close to the nozzle.

6. The rotating single nozzle test experimental device according to claim 4, characterized in that: The jet mechanism includes a shell and a motor located in the shell, the injection pipe is connected to the output shaft of the motor through a transmission structure, one end of the injection pipe passing through the shell is covered with a pressure joint, and the other end of the injection pipe passing through the shell is sleeved with a bearing cover.

7. The rotating single nozzle test experimental device according to claim 6, characterized in that: There is a gap between the pressure joint and the injection pipe.

8. The rotating single nozzle test experimental device according to claim 1, characterized in that: The planar moving structure has an X-axis slide rail and a Y-axis slide rail, and the Y-axis slide rail is movably arranged on the X-axis slide rail; the vertical moving structure has a Z-axis slide rail, and the Z-axis slide rail is movably arranged on the Y-axis slide rail, and the jet mechanism is vertically movably connected to the Z-axis slide rail.

9. The rotating single nozzle test experimental device according to claim 1, characterized in that: It also includes a water tank sliding base, on which the water tank is horizontally movably arranged.

10. The rotating single nozzle test experimental device according to claim 1, characterized in that: Also included is a gantry crane, which can be moved above the water tank.

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