Liftable single-layer probe three-dimensional flow field measuring device

Abstract

According to the liftable single-layer probe three-dimensional flow field measuring device provided by the utility model, the detection mechanism for fixing the probe on the edge of the fixed disc is arranged in the cylinder body, the detection mechanism is controlled by the lifting rod to ascend or descend, so that the detection mechanism can detect at different positions of the cylinder body, and the lifting rod is connected with the lifting disc; when the driving motor drives the lead screw to rotate, the lifting disc in threaded connection with the lead screw moves up and down along with the lead screw, so that lifting of the lifting rod and the detection mechanism is achieved. In addition, a positioning module composed of a positioning guide rail, a sliding block and an inductance limiting switch is arranged in the barrel, so that the lifting mechanism pauses at the inductance limiting switch, and pausing is started and stopped through a control module. By the adoption of the technical scheme, the probes can ascend and descend in the barrel, all parts in the barrel can be detected with a small number of probes, and the equipment time is effectively shortened; meanwhile, disturbance of fluid in the cylinder is reduced with a small number of probes; and the positioning control module controls the lifting mechanism to stay at a fixed position, so that the detection accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of jet mixing experiment temperature field measurement equipment, specifically to a liftable single-layer probe three-dimensional flow field measurement device. Background Technology

[0002] In core jet turbulence or similar high Reynolds number mixing experiments, in order to obtain the three-dimensional temperature field of the mixing zone, a multi-layer (usually greater than or equal to five layers) temperature probe array is often fixedly arranged in the experimental section to detect the temperature field of each zone.

[0003] However, setting multiple temperature probes in each layer, and in a multi-layer setup, results in an excessive number of probes. Too many probes can disturb the jet, causing measurement deviations. Furthermore, a large number of probes leads to long assembly and calibration times, and a fixed setup makes it inconvenient to add or remove measurement points without disrupting the existing flow field.

[0004] Therefore, there is a need for a device that can reduce the number of probes and enable detection in different regions. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of the aforementioned technologies by proposing a liftable single-layer probe three-dimensional flow field measurement device. This device aims to solve the problems of having too many fixed probes, making it inconvenient to add or reduce them, the long equipment time, and the large deviation in measurement results caused by too many probes disturbing the jet.

[0006] This utility model provides a liftable single-layer probe three-dimensional flow field measurement device. The top of the cylinder is provided with a top cover, and a detection mechanism for detecting the flow field is provided inside the cylinder. The top of the detection mechanism is connected to a lifting mechanism for raising and lowering the detection mechanism, so that the detection mechanism can detect at different depths in the cylinder. The lifting mechanism extends through the top cover to the outside of the cylinder. A drive mechanism is fixedly connected to the top of the top cover. The drive mechanism is fixedly connected to the lifting mechanism. The lifting mechanism is connected to a positioning control module to control the position of the detection mechanism inside the cylinder.

[0007] Preferably, the detection mechanism includes a fixed plate, and a plurality of through holes are equally spaced on the peripheral edge of the fixed plate. Each through hole is detachably fitted with a fixing buckle, which secures the probe. The top of the fixed plate is fixedly connected to the lifting mechanism.

[0008] Preferably, the lifting mechanism includes a connecting rod, one end of which is vertically and fixedly connected to the top of the fixed plate, and the other end of which passes through the top cover and is connected to the lifting plate, and the center of the lifting plate is connected to the driving mechanism.

[0009] The driving mechanism includes a sleeve fixedly connected to the top cover. A fixed base is fixedly connected to the top of the sleeve. A drive motor is fixed inside the fixed base. A lead screw is connected to the output end of the drive motor. The other end of the lead screw is rotatably connected to the top of the top cover. The center of the lifting plate is threadedly engaged with the lead screw. The sleeve has several slots along its length. The lifting plate has several irregular holes corresponding to the spacers formed by adjacent slots. The spacers pass through the irregular holes.

[0010] Preferably, the positioning control module includes a positioning module and a control module. The positioning module determines the position of the mechanism on the cylinder and feeds back the measured position to the control module to control the lifting mechanism's lifting action.

[0011] Preferably, the positioning module includes a positioning guide rail parallel to the connecting rod. The top end of the positioning guide rail is fixedly connected to the bottom surface of the top cover, and the bottom end of the positioning guide rail is spaced apart from the edge of the fixed disk. A slider is slidably mounted on the surface of the positioning guide rail. The other end of the slider is fixedly connected to the side of the connecting rod near the fixed disk. The slider rises and falls on the positioning guide rail as the connecting rod rises and falls. The positioning guide rail has several through holes at equal intervals. An inductive limit switch is installed in each through hole. The inductive limit switch determines the position of the lifting mechanism by sensing the position of the slider. The inductive limit switch is connected to the control module.

[0012] Preferably, the control module includes a delay restart module, the signal input terminal of which is connected to the inductive limit switch, and the signal output terminal of which is connected to the drive motor. The delay restart module starts, closes, and reverses the drive motor according to the signal from the inductive limit switch. The delay restart module is electrically connected to a delay timer, and the delay timer controls the dwell time of the slider at the inductive limit switch.

[0013] Compared with existing technologies, it has the following beneficial effects:

[0014] This invention provides a liftable single-layer probe three-dimensional flow field measurement device. A detection mechanism is installed inside the cylinder to fix the probe to the edge of a fixed plate. The detection mechanism is controlled by a lifting rod to rise or fall, allowing it to perform detection at different positions within the cylinder. The lifting rod is connected to a lifting plate. When a drive motor rotates a lead screw, the lifting plate, threadedly connected to the lead screw, moves up and down accordingly, thus achieving the lifting and lowering of the lifting rod and the detection mechanism. Furthermore, a positioning module consisting of a positioning guide rail, a slider, and an inductive limit switch is installed inside the cylinder to stop the lifting mechanism at the inductive limit switch. The stopping is controlled by the control module. Using this technical solution, the probe can rise and fall within the cylinder, allowing for detection of various parts of the cylinder with a smaller number of probes, effectively reducing equipment time. Simultaneously, the fewer probes reduce fluid disturbance within the cylinder. The positioning control module controls the lifting mechanism to stop at a fixed position, improving detection accuracy. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a liftable single-layer probe three-dimensional flow field measurement device according to the present invention;

[0017] Figure 2 This is an internal structural diagram of a liftable single-layer probe three-dimensional flow field measurement device according to the present invention;

[0018] Figure 3 This is a partially enlarged schematic diagram of part A of the present invention;

[0019] Figure 4 This is a schematic diagram of the lifting mechanism and drive mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the lifting plate of this utility model;

[0021] Figure 6 This is a schematic diagram of the lifting mechanism and positioning control module of this utility model;

[0022] Figure 7 This is a partially enlarged schematic diagram of part B of the present invention;

[0023] Figure 8 This is a schematic diagram of the positioning control module of this utility model;

[0024] Figure 9 This is a flowchart of the positioning control module of this utility model.

[0025] In the diagram, 1-cylinder body; 11-top cover; 2-detection mechanism; 21-fixed plate; 211-perforation; 212-fixing buckle; 22-probe; 3-lifting mechanism; 31-connecting rod; 32-lifting plate; 321-irregular hole; 322-gasket; 4-drive mechanism; 41-sleeve; 411-groove; 412-spacer plate; 42-fixed seat; 43-drive motor; 44-lead screw; 5-positioning control module; 51-positioning module; 511-positioning guide rail; 512-slider; 513-through hole; 514-inductive limit switch; 52-control module; 521-delay restart module; 522-delay timer. Detailed Implementation

[0026] To better understand the structure, functional features, and advantages of this utility model, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings:

[0027] Example:

[0028] like Figures 1 to 9 As shown, this utility model provides a liftable single-layer probe three-dimensional flow field measurement device, including a cylindrical body 1, a top cover 11 at the top of the cylindrical body 1, a detection mechanism 2 for detecting the flow field inside the cylindrical body 1, a lifting mechanism 3 for raising and lowering the detection mechanism 2 at the top of the detection mechanism 2 so that the detection mechanism 2 can detect at different depths in the cylindrical body 1, the lifting mechanism 3 extends through the top cover 11 to the outside of the cylindrical body 1, a drive mechanism 4 is fixedly connected to the top of the top cover 11, the drive mechanism 4 is fixedly connected to the lifting mechanism 3, and the lifting mechanism 3 is connected to a positioning control module 525 to control the position of the detection mechanism 2 inside the cylindrical body 1.

[0029] The cylinder 1 has multiple connection ports and ventilation ducts around its perimeter to facilitate the connection of other related testing equipment, forming a complete fluid channel. Nozzles are installed at the bottom of the cylinder 1 for jet spraying. The top cover 11 is fixed to the top of the cylinder 1 via a flange. The drive mechanism 4 drives the lifting mechanism 3 to move up and down, thereby causing the control mechanism to move up and down inside the cylinder 1. During the lifting process, different positions inside the cylinder 1 are detected. The positioning control module 525 controls the opening and closing of the drive device; closing it stops the drive device from moving, and opening it starts the drive device from moving.

[0030] As another embodiment, such as Figure 2 and Figure 3As shown, the detection mechanism 2 described in this application includes a fixed plate 21. The peripheral edge of the fixed plate 21 is provided with a plurality of through holes 211 at equal intervals. The through holes 211 are detachably provided with fixing buckles 212, which fix the probe 22. The top of the fixed plate 21 is fixedly connected to the lifting mechanism 3.

[0031] The fixed plate 21 has the same cross-sectional shape as the cylinder 1. In this application, the cylinder 1 and the fixed plate 21 are cylindrical and disc-shaped, respectively. The fixed plate 21 is a hollow annular shape to reduce disturbance to the jet. The probe 22 is located on the outer edge of the fixed plate 21. There can be several probes 22. In this application, 3-5 probes 22 are preferably provided according to the size of the cylinder 1 and the actual use. The fixing buckle 212 is a commonly used probe 22 fixing component. In this application, an expansion tube is inserted into the perforation 211, and the probe 22 is snapped into the expansion tube. The probe 22 is connected to the external positioning control module 525 through a flexible cable passing through the top cover 11 of the cylinder 1.

[0032] As another embodiment, such as Figures 2 to 6 As shown, the lifting mechanism 3 of this application includes a connecting rod 31. One end of the connecting rod 31 is vertically and fixedly connected to the top of the fixed plate 21. The other end of the connecting rod 31 passes through the top cover 11 and is connected to a lifting plate 32. The center of the lifting plate 32 is connected to the driving mechanism 4. The driving mechanism 4 includes a sleeve 41 fixedly connected to the top cover 11. A fixed seat 42 is fixedly connected to the top of the sleeve 41. A drive motor 43 is fixed inside the fixed seat 42. The output end of the drive motor 43 is connected to a lead screw 44. The other end of the lead screw 44 is rotatably connected to the top of the top cover 11. The center of the lifting plate 32 is threadedly engaged with the lead screw 44. The sleeve 41 has several slots 411 along its length. The lifting plate 32 has several irregular holes 321 corresponding to the spacers 412 formed by adjacent slots 411. The spacers 412 pass through the irregular holes 321. A pad 322 is fixedly connected to the edge of the irregular hole 321, and the pad 322 slides against the spacer plate 412.

[0033] The connecting rod 31 is a cylindrical rod, and it is fixedly connected to the edge of the lifting plate 32 by bolts or flanges. The center of the lifting plate 32 is threadedly connected to the lead screw 44 of the drive mechanism 4. The sleeve 41 is fixedly connected to the top of the top cover 11 by bolts. The fixing seat 42 is a hollow metal seat welded to the top of the sleeve 41. The drive motor 43 is a stepper motor, which is fixed by the fixing seat 42. The output end of the drive motor 43 is fixed to one end of the lead screw 44 by a coupling. The other end of the lead screw 44 is rotatably connected to the top of the top cover 11. The rotatable connection here is achieved by welding a metal sleeve to the top of the top cover 11, and the end of the lead screw 44 is inserted into the metal sleeve. Since the lead screw 44 is threadedly connected to the lifting plate 32, when the lead screw 44 rotates, it will drive the lifting plate 32 to rotate. However, after fixing the rotation direction of the lifting plate 32, when the lead screw 44 rotates, it can drive the lifting plate 32 to rise and fall along the lead screw 44. Therefore, several slots 411 are formed along the length of the sleeve 41, and a spacer plate 412 is formed between adjacent slots 411. The spacer plate 412 is inserted into the irregular hole 321 of the lifting plate 32, and the shape of the irregular hole 321 matches the shape of the spacer plate 412. At this time, when the lead screw 44 rotates, the lifting plate 32 cannot rotate because it is limited by the spacer plate 412, and can rise or fall along the lead screw 44. The gasket 322 is made of rubber and has a smooth surface to reduce the gap between the irregular hole 321 and the spacer plate 412. The gasket 322 is fixed to the edge of the irregular hole 321 by adhesive or by screws. The drive motor 43 drives the lead screw 44 to rotate. When the lead screw 44 drives the lifting plate 32 to rise and fall, vibration will be generated. The gasket 322 can reduce noise and reduce the rigid collision between the lifting plate 32 and the spacer plate 412, thus extending the service life.

[0034] As another embodiment, such as Figures 6 to 9 As shown, the positioning control module 525 of this application includes a positioning module 51 and a control module 52. The positioning module 51 determines the position of the mechanism on the cylinder 1 and feeds back the measured position to the control module 52 to control the opening and closing of the lifting mechanism 3.

[0035] The positioning module 51 includes a positioning guide rail 511 parallel to the connecting rod 31. The top end of the positioning guide rail 511 is fixedly connected to the bottom surface of the top cover 11. The bottom end of the guide rail is spaced apart from the edge of the fixed plate 21. A slider 512 is slidably mounted on the surface of the positioning guide rail 511. The other end of the slider 512 is fixedly connected to the side of the connecting rod 31 near the fixed plate 21. The slider 512 moves up and down on the positioning guide rail 511 as the connecting rod 31 moves up and down. The positioning guide rail 511 has several through holes 513 at equal intervals. An inductive limit switch 514 is installed in the through hole 513. The position of the lifting mechanism 3 is determined by the inductive limit switch 514 sensing the position of the slider 512. The inductive limit switch 514 is connected to the control module 52.

[0036] One end of the positioning guide rail 511 is welded or screwed to the bottom surface of the top cover 11, i.e., the top cover 11 is located on one side inside the cylinder 1. The other end of the positioning guide rail 511 points to the bottom of the cylinder 1, leaving a certain gap with the edge of the fixed plate 21 to prevent obstruction of the lifting and lowering of the fixed plate 21. One side of the slider 512 is welded to the side of the connecting rod 31 near the fixed plate 21, and it rises and falls with the connecting rod 31. The side of the slider 512 away from the connecting rod 31 is fitted onto the positioning guide rail 511 and moves up and down along the length of the positioning guide rail 511. Several through holes 513 are provided on the positioning guide rail 511. According to the actual size of the cylinder 1, this application provides 5 through holes 513, and 5 inductive limit switches 514 are correspondingly provided. The inductive limit switches 514 are fixed by expansion tubes inserted into the through holes 513, and their output lines extend to the outside of the cylinder 1 and connect to the control module 52. The slider 512 is a ferromagnetic metal block, such as iron, carbon steel, or stainless steel. This application uses stainless steel, which is corrosion-resistant. When the slider 512 slides to the inductive limit switch 514, its sensing part detects the position of the slider 512 and feeds back the position signal to the control module 52. The control module 52 then controls the drive motor 43 to stop running.

[0037] As another embodiment, such as Figure 8 and Figure 9 As shown, the control module 52 of this application includes a delay restart module 521. The signal input terminal of the delay restart module 521 is connected to the inductive limit switch 514, and the signal output terminal of the delay restart module 521 is connected to the drive motor 43. The delay restart module 521 starts and stops the drive motor 43 according to the signal of the inductive limit switch 514.

[0038] The initial position of the detection mechanism 2 is at the bottom of the cylinder 1. The drive unit is activated, causing the detection mechanism 2 to rise. Simultaneously, the slider 512 rises. Each time the slider 512 passes an inductive limit switch 514, the inductive limit switch 514 transmits a signal to the delay restart module 521, pausing the drive motor 43 and starting the delay timer 522. After the preset time is reached, the drive motor 43 restarts and continues rising. This continues until the slider 512 reaches the uppermost inductive limit switch 514, at which point the delay timer 522 has finished counting. Then, the delay restart module 521 controls the drive motor 43 to reverse, repeatedly stopping at the inductive limit switch 514, until the slider 512 reaches the lowermost inductive limit switch 514, at which point the delay timer 522 has finished counting. Finally, the drive motor 43 is turned off, stopping the detection activity. The test pause time is 3-6 seconds.

[0039] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of this utility model without departing from the scope of the technical solution of this utility model shall fall within the protection scope of this technical solution.

Claims

1. A vertically movable single-layer probe three-dimensional flow field measuring device comprising a cylinder, characterized in that, The top end of the barrel (1) is provided with a top cover (11), the inside of the barrel (1) is provided with a detection mechanism (2) for detecting flow field, the top of the detection mechanism (2) is connected with a lifting mechanism (3) for lifting the detection mechanism (2), so that the detection mechanism (2) detects at different depths of the barrel (1), the lifting mechanism (3) extends to the outside of the barrel (1) through the top cover (11), the top end of the top cover (11) is fixedly connected with a driving mechanism (4), the driving mechanism (4) is fixedly connected with the lifting mechanism (3), the lifting mechanism (3) is connected with a positioning control module (5) for controlling the position of the detection mechanism (2) in the barrel (1).

2. The liftable single-probe three-dimensional flow field measurement device according to claim 1, characterized by, The detection mechanism (2) comprises a fixed disc (21), a plurality of through holes (211) are equidistantly arranged on the circumferential edge of the fixed disc (21), a fixing buckle (212) is detachably arranged in the through hole (211), the fixing buckle (212) fixes a probe (22), and the top end of the fixed disc (21) is fixedly connected with the lifting mechanism (3).

3. The liftable single-probe three-dimensional flow field measurement device according to claim 2, wherein, The lifting mechanism (3) comprises a connecting rod (31), one end of the connecting rod (31) is vertically and fixedly connected to the top end of the fixed disc (21), the other end of the connecting rod (31) passes through the top cover (11) and is connected with a lifting disc (32), and the center of the lifting disc (32) is connected with the driving mechanism (4).

4. The liftable single-probe three-dimensional flow field measurement device according to claim 3, characterized by, The driving mechanism (4) comprises a sleeve (41) fixedly connected to the top cover (11), a fixed seat (42) is fixedly connected to the top end of the sleeve (41), a driving motor (43) is fixedly arranged in the fixed seat (42), an output end of the driving motor (43) is connected with a lead screw (44), the other end of the lead screw (44) is rotatably connected to the top end of the top cover (11), the center of the lifting disc (32) is in threaded engagement with the lead screw (44), a plurality of grooves (411) are formed in the sleeve (41) along the length direction of the sleeve (41), a plurality of special-shaped holes (321) are formed in the lifting disc (32) corresponding to the interval plates (412) formed by adjacent grooves (411), and the interval plates (412) pass through the special-shaped holes (321).

5. The liftable single-probe three-dimensional flow field measurement device according to claim 4, wherein, The positioning control module (5) comprises a positioning module (51) and a control module (52), the position of the mechanism in the barrel (1) is measured by the positioning module (51), and the measured position is fed back to the control module (52) to control the opening and closing of the lifting action of the lifting mechanism (3).

6. The liftable single-probe three-dimensional flow field measurement device according to claim 5, wherein, The positioning module (51) includes a positioning guide rail (511) parallel to the connecting rod (31), the top end of the positioning guide rail (511) is fixedly connected with the bottom surface of the top cover (11), the bottom end of the positioning guide rail (511) is arranged in a gap with the edge of the fixed disc (21), a sliding block (512) is sleeved on the surface of the positioning guide rail (511), the other end of the sliding block (512) is fixedly connected with the side of the connecting rod (31) close to the fixed disc (21), the sliding block (512) rises and falls on the positioning guide rail (511) along with the lifting of the connecting rod (31), the positioning guide rail (511) is provided with a plurality of through holes (513) at equal intervals, an inductive limit switch (514) is arranged in the through hole (513), the position of the lifting mechanism (3) is determined by the inductive limit switch (514) through the induction of the position of the sliding block (512), and the inductive limit switch (514) is connected with the control module (52).

7. The liftable single-probe three-dimensional flow field measurement device according to claim 6, wherein, The control module (52) includes a delay restart module (521), the signal input end of the delay restart module (521) is connected with the inductive limit switch (514), the signal output end of the delay restart module (521) is connected with the driving motor (43), the delay restart module (521) starts, closes and reverses the driving motor (43) according to the signal of the inductive limit switch (514), and the delay restart module (521) is electrically connected with a delay timer (522), and the delay timer (522) controls the residence time of the sliding block (512) at the inductive limit switch (514).

8. The liftable single-probe three-dimensional flow field measurement device according to claim 4, wherein, The edge of the special-shaped hole (321) is fixedly connected with a gasket (322), and the gasket (322) is in sliding abutment with the spacing plate (412).

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