A spindle flow throttling device

Abstract

The present invention discloses a novel spindle flow throttling device, which relates to the technical field of spindle flow throttling devices, and includes a shell and a spindle throttling assembly; the spindle throttling assembly includes a hemispherical fairing, a column section, a tail contraction section, an annular wing plate and a plurality of support plates; a detection mechanism, the detection mechanism includes a mounting plate fixedly connected to the inner wall of the column section, the side wall of the mounting plate is provided with an annular T-groove, the inner wall of the annular T-groove is slidably connected to a plurality of T-shaped rods, the other ends of the plurality of T-shaped rods are commonly fixedly connected to a hollow column, the inner wall of the hollow column is provided with a plurality of slide grooves, the inner walls of the plurality of slide grooves are all slidably connected to a slide column, and one end of the slide column is provided with a vertical groove. Compared with the existing spindle throttling meter, the present invention is smaller in size, simpler to install, and can produce an external throttling effect. At the same time, the annular cross-section flow channel gap is small and the flow direction has a certain length, which has a rectifying effect on the flow and is more convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of spindle flow throttling devices, in particular to a spindle flow throttling device. Background Art

[0002] The spindle flowmeter is a throttling flowmeter. Due to the use of external throttling type and streamlined spindle throttling element design, this flowmeter has the advantages of short straight pipe section, strong anti-fouling ability, good wear resistance and low pressure loss. It has achieved good application results in the fields of two-way flow measurement of underground natural gas storage, flow measurement of large-diameter industrial gas pipelines and flow measurement of natural gas production processes in oil and gas fields.

[0003] In the current design of spindle flowmeters, in order to reduce the flow separation at the tail of the spindle throttling element, the end cone of the spindle throttling element is relatively long, resulting in a relatively large overall length of the throttling device, generally 4 to 5 times the pipe diameter. For large-diameter pipe flowmeters, the longer meter body length brings transportation difficulties and insufficient on-site installation space, which to a certain extent limits the use and promotion of this flowmeter. In addition, if the surface of the straight cylindrical section of the spindle flowmeter is concave, it will affect the flow state of the fluid, resulting in inaccurate flow measurement values ​​of the fluid.

[0004] Based on this, we propose a spindle flow throttling device. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a spindle flow throttling device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A spindle flow throttling device comprises a housing and a spindle throttling assembly;

[0008] The spindle throttling assembly includes a hemispherical fairing, a cylindrical section, a tail contraction section, an annular wing plate and a plurality of support plates;

[0009] The cam is fixedly connected to the inner wall of the column section, and the side wall of the cam is provided with an annular T-slot, and the inner wall of the annular T-slot is slidably connected to a plurality of T-shaped rods, and the other ends of the plurality of T-shaped rods are jointly fixedly connected to the hollow column, and the inner wall of the hollow column is provided with a plurality of sliding grooves, and the inner wall of the plurality of sliding grooves are all slidably connected to the sliding column. One end of the sliding column is provided with a vertical groove, and the inner wall of the vertical groove is sealed and slidably connected to the vertical rod, and one end of the vertical rod is fixedly connected to the arc plate, and the inner wall of the vertical groove and the vertical rod are jointly fixedly connected with a first spring. The inner wall of the vertical groove is embedded with a first conductive sleeve, and the side wall of the vertical rod is embedded with a second conductive sleeve. The side wall of the mounting plate is fixedly connected to the motor, and the output end of the motor passes through the side wall of the mounting plate and is fixedly connected to a one-way bearing. The side wall of the one-way bearing is fixedly connected to a plurality of fixing rods, and the other ends of the plurality of fixing rods are respectively fixedly connected to the plurality of T-shaped rods, and the first conductive sleeve, the second conductive sleeve, the motor and the external power supply are electrically connected by wires.

[0010] Preferably, the column section is fixedly connected to the side wall of the hemispherical fairing, the tail contraction section is fixedly connected to the side wall of the column section, the annular wing plate is fixedly connected to the side wall of the tail contraction section, and the multiple support plates are respectively fixedly connected to the side walls of the hemispherical fairing and the tail contraction section, and the multiple support plates are all fixedly connected to the inner wall of the shell.

[0011] Preferably, an annular plate is fixedly connected to the inner wall of the sliding groove, and a plurality of second springs are fixedly connected between the annular plate and the sliding column.

[0012] Preferably, a repair mechanism is installed on the sliding column, and the repair mechanism includes a cavity opened in the sliding column, the inner wall of the cavity is sealed and slidably connected to a slide, the side wall of the slide is fixedly connected to a repair rod, one end of the repair rod passes through one end of the sliding column and is fixedly connected to a support plate, and the cavity is connected to the vertical groove through a connecting pipe.

[0013] Preferably, the repair mechanism further comprises a rotating shaft fixedly connected to one end of the one-way bearing, and a plurality of cams are fixedly connected to the side wall of the rotating shaft.

[0014] Preferably, a third conductive sleeve is embedded in the inner wall of the vertical slot, and the second conductive sleeve, the third conductive sleeve, the motor and the external power supply are electrically connected via a wire.

[0015] Preferably, four high-pressure pressure-taking pipes are fixedly connected to the side wall of the shell, and four low-pressure pressure-taking pipes are fixedly connected to the side wall of the shell.

[0016] Preferably, a temperature sensor socket is fixedly connected to the side wall of the shell, and two flanges are symmetrically fixedly connected to the side wall of the shell.

[0017] The present invention has the following beneficial effects:

[0018] 1. By setting up the spindle throttling component, compared with the existing spindle throttle meter, the volume is smaller and the installation is simpler, and it can produce external throttling effect. At the same time, the gap of the annular cross-section flow channel is small and the flow direction has a certain length, which has a rectifying effect on the flow and is more convenient to use;

[0019] 2. By setting up a detection mechanism and a repair mechanism, the surface depression of the column segment can be monitored. When there is a depression on the surface of the column segment, the curved plate can quickly repair the depression, avoiding the depression on the surface of the column segment from affecting the flow state of the fluid, thereby affecting the monitoring calculation of the fluid flow;

[0020] 3. The arc-shaped plate can provide a certain support for the column segment, making it less likely for the surface of the column segment to dent. Friction between the column segment and the arc-shaped plate will generate heat, which will be transferred to the entire spindle throttling assembly. The heat will then diffuse to the fluid, causing the temperature of the fluid to rise, thereby increasing the fluidity of the fluid, making it more convenient for fluid circulation and easier for detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a spindle flow throttling device proposed by the present invention;

[0022] Figure 2 for Figure 1 A schematic side view of the mid-structure;

[0023] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the middle shell;

[0024] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of the mid-spindle throttle assembly;

[0025] Figure 5 for Figure 4 A schematic diagram of the structure enlargement at point A;

[0026] Figure 6 for Figure 4 A magnified schematic diagram of the structure at point B in FIG.

[0027] Figure 7 for Figure 1 Schematic diagram of the top view of the structure;

[0028] Figure 8 for Figure 3 Schematic diagram of the three-dimensional structure of the spindle throttle assembly.

[0029] In the figure: 1. shell; 2. spindle throttling assembly; 3. hemispherical fairing; 4. column section; 5. tail contraction section; 6. annular wing plate; 7. support plate; 8. mounting plate; 9. annular T-slot; 10. T-bar; 11. hollow column; 12. slide groove; 13. slide column; 14. vertical groove; 15. vertical bar; 16. arc plate; 17. first spring; 18. first conductive sleeve; 19. second conductive sleeve; 20. annular plate; 21. second spring; 22. cavity; 23. slide plate; 24. repair rod; 25. abutment plate; 26. connecting pipe; 27. motor; 28. rotating shaft; 29. ​​one-way bearing; 30. fixing rod; 31. cam; 32. third conductive sleeve; 33. high-pressure pressure taking pipe; 34. low-pressure pressure taking pipe; 35. temperature sensor pipe socket; 36. flange. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Reference Figures 1-8 , a spindle flow throttling device, comprising a housing 1 and a spindle throttling assembly 2;

[0032] The spindle throttling assembly 2 includes a hemispherical fairing 3, a cylindrical section 4, a tail contraction section 5, an annular wing plate 6 and a plurality of support plates 7;

[0033] The detection mechanism includes a mounting plate 8 fixedly connected to the inner wall of the column section 4, and a side wall of the mounting plate 8 is provided with an annular T-slot 9 (such as Figure 6As shown), the inner wall of the annular T-slot 9 is slidably connected to a plurality of T-shaped rods 10, and the other ends of the plurality of T-shaped rods 10 are commonly fixedly connected to a hollow column 11, and the inner wall of the hollow column 11 is provided with a plurality of slide grooves 12, and the inner walls of the plurality of slide grooves 12 are slidably connected to a slide column 13, and one end of the slide column 13 is provided with a vertical groove 14, and the inner wall of the vertical groove 14 is sealed and slidably connected to a vertical rod 15, and one end of the vertical rod 15 is fixedly connected to an arc plate 16, and a first spring 17 is commonly fixedly connected between the inner wall of the vertical groove 14 and the vertical rod 15, and a first conductive sleeve 18 is embedded in the inner wall of the vertical groove 14, and the side wall of the vertical rod 15 A second conductive sleeve 19 is embedded, and a motor 27 is fixedly connected to the side wall of the mounting plate 8. The output end of the motor 27 passes through the side wall of the mounting plate 8 and is fixedly connected to a one-way bearing 29. A plurality of fixing rods 30 are fixedly connected to the side wall of the one-way bearing 29. The output end of the motor 27 is fixedly connected to the inner ring of the one-way bearing 29. The plurality of fixing rods 30 are fixedly connected to the side wall of the outer ring of the one-way bearing 29. The other ends of the plurality of fixing rods 30 are respectively fixedly connected to a plurality of T-shaped rods 10. The first conductive sleeve 18, the second conductive sleeve 19, the motor 27 and the external power supply are electrically connected through wires.

[0034] Furthermore, during the fluid circulation process, a positive current is passed through the motor 27, and the motor 27 will drive the one-way bearing 29 to rotate. At this time, due to the positive rotation of the one-way bearing 29, the outer ring and the inner ring of the one-way bearing 29 will rotate synchronously, thereby driving the rotating shaft 28 and multiple fixed rods 30 to rotate. The fixed rod 30 will drive multiple T-shaped rods 10 to rotate, drive the hollow column 11 to rotate, and the hollow column 11 will drive multiple arc plates 16 to rotate. The arc plate 16 will fit with the inner wall of the column segment 4 under the action of the first spring 17, so it can play a certain supporting role on the column segment 4, making it less likely for the surface of the column segment 4 to be concave, and friction will be generated between the column segment 4 and the arc plate 16, which will generate heat. The heat will be transferred to the entire spindle throttling assembly 2, so that the heat will diffuse to the fluid, causing the temperature of the fluid to rise, thereby increasing the fluidity of the fluid, making it more convenient for fluid circulation and easy to detect.

[0035] The column section 4 is fixedly connected to the side wall of the hemispherical fairing 3, the tail contraction section 5 is fixedly connected to the side wall of the column section 4, the annular wing plate 6 is fixedly connected to the side wall of the tail contraction section 5, and multiple support plates 7 are respectively fixedly connected to the side walls of the hemispherical fairing 3 and the tail contraction section 5, and the multiple support plates 7 are all fixedly connected to the inner wall of the shell 1.

[0036] It is worth mentioning that the annular wing plate 6 can reduce the flow separation effect of the tail contraction section 5, prevent the generation of large-scale vortex shedding, reduce flow losses, and reduce pressure fluctuations and pressure signal pulsations caused by large-scale vortex shedding.

[0037] It should be noted that the spindle throttling assembly 2 is coaxially fixed to the inner wall of the housing 1 through multiple support plates 7, which can form a ring-shaped cross-section flow channel. This throttling device produces an external throttling effect on the fluid entering its flow channel.

[0038] An annular plate 20 is fixedly connected to the inner wall of the sliding groove 12 , and a plurality of second springs 21 are fixedly connected between the annular plate 20 and the sliding post 13 .

[0039] It should be noted that the spring constant of the second spring 21 is greater than that of the first spring 17 . The second spring 21 will only start to be compressed when the first spring 17 is compressed to its limit.

[0040] A repair mechanism is installed on the sliding column 13, which includes a cavity 22 opened in the sliding column 13. The inner wall of the cavity 22 is sealed and slidably connected to a slide plate 23. The side wall of the slide plate 23 is fixedly connected to a repair rod 24. One end of the repair rod 24 passes through one end of the sliding column 13 and is fixedly connected to a support plate 25. The cavity 22 is connected to the vertical groove 14 through a connecting pipe 26.

[0041] It should be noted that the diameter and height of the cavity 22 are equal to the diameter and height of the vertical slot 14 .

[0042] The repair mechanism further includes a rotating shaft 28 fixedly connected to one end of a one-way bearing 29 , and a plurality of cams 31 are fixedly connected to the side wall of the rotating shaft 28 .

[0043] It should be noted that the rotating shaft 28 is fixedly connected to the inner ring of the one-way bearing 29, and since the output end of the motor 27 is fixedly connected to the inner ring of the one-way bearing 29, multiple fixing rods 30 are fixedly connected to the side wall of the outer ring of the one-way bearing 29. Therefore, when the motor 27 is supplied with a forward current, the outer ring and the inner ring of the one-way bearing 29 will rotate together. When the motor 27 is supplied with a reverse current, the inner ring of the one-way bearing 29 rotates, but the outer ring does not rotate.

[0044] A third conductive sleeve 32 is embedded in the inner wall of the vertical slot 14 , and the second conductive sleeve 19 , the third conductive sleeve 32 , the motor 27 and the external power supply are electrically connected via wires.

[0045] Furthermore, when a depression occurs somewhere in the column segment 4, the depression will bulge toward the inside of the column segment 4, and the arc plate 16 will rotate to this point. The bulge will push the arc plate 16, driving the vertical rod 15 to slide and squeeze the first spring 17. At this time, the movement of the vertical rod 15 will drive the second conductive sleeve 19 to move, so that the second conductive sleeve 19 is separated from the first conductive sleeve 18 and contacts the third conductive sleeve 32. Then, the motor 27 will pass a reverse current to drive the one-way bearing 29 to rotate in the opposite direction, thereby driving the rotating shaft 28 to rotate in the opposite direction. At this time, the outer ring of the one-way bearing 29 does not rotate, and the hollow column 11 will stop rotating, causing the arc plate 16 to stop rotating and stay in the depression. Moreover, since the vertical rod 15 slides a certain distance (the moving distance of the vertical rod 15 is equal to the depth of the depression), part of the air in the vertical slot 14 will be squeezed into the cavity 22 through the connecting pipe 26, thereby pushing the slide plate 23 to move, driving The repair rod 24 moves, thereby driving the plate 25 to move in the direction close to the cam 31. Since the diameter and height of the vertical slot 14 are the same as the diameter and height of the cavity 22, the movement distance of the vertical rod 15 is the same as the movement distance of the plate 25. At this time, the rotation of the rotating shaft 28 will drive the cam 31 to rotate. When the cam 31 rotates to abut against the plate 25, it will push the plate 25 to move, thereby driving the sliding column 13 to move, driving the curved plate 16 to move, squeezing the convex part of the inner wall of the column segment 4, so that it slowly returns to its original position, and thus the concave part of the column segment 4 can be quickly repaired. During the repair process, the vertical rod 15 will slowly reset under the action of the first spring 17 until the repair is completed. The vertical rod 15 is reset. At this time, the second conductive sleeve 19 separates from the third conductive sleeve 32 and contacts the first conductive sleeve 18 again. The motor 27 will pass a positive current, driving the curved plate 16 to rotate again.

[0046] Four high-pressure pressure-taking pipes 33 are fixedly connected to the side wall of the shell 1, and four low-pressure pressure-taking pipes 34 are fixedly connected to the side wall of the shell 1. Multi-point pressure taking is adopted at the cross section of the high-pressure pressure-taking pipe 33 to reduce the influence of uneven flow on pressure measurement. Single-point pressure taking is adopted at the cross section of the low-pressure pressure-taking pipe 34. This is because the pressure distribution tends to be uniform after the flow passes through the annular cross-section flow channel for rectification, and there is no need to adopt multi-point pressure taking.

[0047] It should be noted that the support plates 7 are divided into two groups, front and rear, to fix the spindle throttling assembly 2 in the housing 1. The number of support plates 7 in each group is consistent with the number of high-pressure pressure-taking tubes 33, and they are evenly arranged along the circumference of the spindle throttling assembly 2, and staggered with the high-pressure pressure-taking tube 33.

[0048] Furthermore, the fluid flows in from the inlet on the left side of the housing 1 and flows out from the outlet on the right side of the housing 1 (e.g. Figure 3As shown), the fluid can flow in the annular section between the inner wall of the housing 1 and the spindle throttling assembly 2, and then the fluid pressure in the housing 1 is measured through the high-pressure pressure taking pipe 33 and the low-pressure pressure taking pipe 34. The flow rate of the fluid can be calculated based on the pressure difference and the inner diameter of the pipe.

[0049] It is worth mentioning that the calculation formula for volume flow is:

[0050]

[0051] Where C is the outflow coefficient, which is determined by calibration test; ε is the expansibility correction coefficient, which is calculated based on the equivalent diameter ratio, pressure ratio and gas isentropic index; D is the inner diameter of the pipe of the shell 1; Δp is the pressure difference between the high-pressure pressure pipe 33 and the low-pressure pressure pipe 34; ρ is the fluid density; β is the equivalent diameter ratio, where β is calculated as follows:

[0052]

[0053] Wherein d is the diameter of the column section 4 in the spindle throttling assembly 2, and the length of the column section 4 in the spindle throttling assembly 2 is not less than 1d, the length of the tail contraction section 5 is approximately 0.5d, the length of the annular wing plate 6 is approximately 0.1d, the pressure taking section of the high-pressure pressure taking tube 33 is located at least 0.1d to the left of the vertex of the hemispherical fairing 3, the pressure taking section of the low-pressure pressure taking tube 34 corresponds to the approximately middle position of the column section 4, and the temperature sensor tube seat 35 is welded to the shell 1, and the position corresponds to the area of ​​the tail contraction section 5.

[0054] A temperature sensor tube base 35 is fixedly connected to the side wall of the shell 1 , and two flanges 36 are symmetrically fixedly connected to the side wall of the shell 1 .

[0055] In the present invention, the fluid flows in from the inlet on the left side of the housing 1 and flows out from the outlet on the right side of the housing 1 (e.g. Figure 3 As shown), the fluid can flow in the annular section between the inner wall of the housing 1 and the spindle throttling assembly 2, and then the fluid pressure in the housing 1 is measured through the high-pressure pressure taking pipe 33 and the low-pressure pressure taking pipe 34. The flow rate of the fluid can be calculated based on the pressure difference and the inner diameter of the pipe.

[0056] During the fluid circulation process, a positive current is passed through the motor 27, and the motor 27 will drive the one-way bearing 29 to rotate. At this time, due to the positive rotation of the one-way bearing 29, the outer ring and the inner ring of the one-way bearing 29 will rotate synchronously, thereby driving the rotating shaft 28 and multiple fixed rods 30 to rotate. The fixed rod 30 will drive multiple T-shaped rods 10 to rotate, drive the hollow column 11 to rotate, and the hollow column 11 will drive multiple arc plates 16 to rotate. The arc plate 16 will fit with the inner wall of the column segment 4 under the action of the first spring 17, so it can play a certain supporting role on the column segment 4, making it less likely for the surface of the column segment 4 to be concave, and friction will be generated between the column segment 4 and the arc plate 16, which will generate heat. The heat will be transferred to the entire spindle throttling assembly 2, so that the heat will diffuse to the fluid, causing the temperature of the fluid to rise, thereby increasing the fluidity of the fluid, making it more convenient for fluid circulation and easy to detect.

[0057] When a depression occurs somewhere in the column segment 4, the depression will bulge toward the inside of the column segment 4, and the arc plate 16 will rotate to this point. The bulge will push the arc plate 16, driving the vertical rod 15 to slide and squeeze the first spring 17. At this time, the movement of the vertical rod 15 will drive the second conductive sleeve 19 to move, so that the second conductive sleeve 19 is separated from the first conductive sleeve 18 and contacts the third conductive sleeve 32. At this time, the motor 27 will pass a reverse current to drive the one-way bearing 29 to rotate in the opposite direction, thereby driving the rotating shaft 28 to rotate in the opposite direction. At this time, the outer ring of the one-way bearing 29 does not rotate, and the hollow column 11 will stop rotating, causing the arc plate 16 to stop rotating and stay in the depression. Moreover, since the vertical rod 15 slides a certain distance (the moving distance of the vertical rod 15 is equal to the depth of the depression), part of the air in the vertical slot 14 will be squeezed into the cavity 22 through the connecting pipe 26, thereby pushing the slide plate 23 to move, driving the repair rod When the cam 31 rotates to abut against the plate 25, it pushes the plate 25 to move, thereby driving the sliding column 13 to move, and driving the arc plate 16 to move, squeezing the protrusion of the inner wall of the column segment 4, so that it slowly returns to its original position, and thus the concave part of the column segment 4 can be quickly repaired. During the repair process, the vertical rod 15 will slowly reset under the action of the first spring 17 until the repair is completed and the vertical rod 15 is reset. At this time, the second conductive sleeve 19 separates from the third conductive sleeve 32 and contacts the first conductive sleeve 18 again. The motor 27 will pass a positive current, and drive the arc plate 16 to rotate again.

[0058] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A spindle flow throttling device, characterized in that: include: shell and spindle throttle assembly; The spindle throttling assembly includes a hemispherical fairing, a column section, a tail contraction section, an annular wing plate and a plurality of support plates; The detection mechanism comprises a mounting plate fixedly connected to the inner wall of the column section, the side wall of the mounting plate is provided with an annular T-slot, the inner wall of the annular T-slot is slidably connected to multiple T-shaped rods, the other ends of the multiple T-shaped rods are jointly fixedly connected to the hollow column, the inner wall of the hollow column is provided with multiple sliding grooves, the inner walls of the multiple sliding grooves are all slidably connected to the sliding column, one end of the sliding column is provided with a vertical groove, the inner wall of the vertical groove is sealed and slidably connected to the vertical rod, one end of the vertical rod is fixedly connected to the arc plate, the inner wall of the vertical groove and the vertical rod are jointly fixedly connected with a first spring, the inner wall of the vertical groove is embedded with a first conductive sleeve, the side wall of the vertical rod is embedded with a second conductive sleeve, the side wall of the mounting plate is fixedly connected to the motor, the output end of the motor passes through the side wall of the mounting plate and is fixedly connected to a one-way bearing, the side wall of the one-way bearing is fixedly connected to multiple fixing rods, the other ends of the multiple fixing rods are respectively fixedly connected to the multiple T-shaped rods, and the first conductive sleeve, the second conductive sleeve, the motor and the external power supply are electrically connected by wires; An annular plate is fixedly connected to the inner wall of the slide groove, and a plurality of second springs are fixedly connected between the annular plate and the slide column; A repair mechanism is installed on the sliding column. The repair mechanism includes a cavity opened in the sliding column. A slide plate is sealingly and slidingly connected to the inner wall of the cavity. A repair rod is fixedly connected to the side wall of the slide plate. One end of the repair rod passes through one end of the sliding column and is fixedly connected to the abutment plate. The cavity is connected to the vertical slot through a connecting pipe. The repair mechanism also includes a rotating shaft fixedly connected to one end of the one-way bearing, and a plurality of cams are fixedly connected to the side wall of the rotating shaft; A third conductive sleeve is embedded in the inner wall of the vertical slot, and the second conductive sleeve, the third conductive sleeve, the motor and the external power supply are electrically connected via wires; When a bulge appears on the inner wall of the column segment due to depression, the arc plate rotates to that position and is pushed by the bulge, driving the vertical rod to slide, so that the second conductive sleeve separates from the first conductive sleeve and contacts with the third conductive sleeve, thereby triggering the motor to rotate in the opposite direction; when the motor reverses, the hollow column stops rotating through the unidirectional action of the one-way bearing, and at the same time drives the cam on the rotating shaft to rotate; the sliding of the vertical rod also presses the air in the vertical groove into the cavity through the connecting pipe, thereby pushing the slide plate and the repair rod, so that the abutment plate moves to abut against the rotating cam, and the cam then pushes the abutment plate and the sliding column, driving the fixed arc plate to squeeze and repair the bulge on the inner wall of the column segment.

2. A spindle flow throttling device according to claim 1, characterized in that: in: The column section is fixedly connected to the side wall of the hemispherical fairing, the tail contraction section is fixedly connected to the side wall of the column section, the annular wing plate is fixedly connected to the side wall of the tail contraction section, and multiple support plates are respectively fixedly connected to the side walls of the hemispherical fairing and the tail contraction section, and the multiple support plates are all fixedly connected to the inner wall of the shell.

3. A spindle flow throttling device according to claim 1, characterized in that: in: Four high-pressure pressure-taking pipes are fixedly connected to the side wall of the shell, and four low-pressure pressure-taking pipes are fixedly connected to the side wall of the shell.

4. A spindle flow throttling device according to claim 1, characterized in that: in: A temperature sensor tube seat is fixedly connected to the side wall of the shell, and two flanges are symmetrically fixedly connected to the side wall of the shell.

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