Spiral heat pipe inspection device

Abstract

The application discloses a spiral heat transfer pipe inspection device, which comprises a probe pipeline for entering and exiting a spiral heat transfer pipe, at least one set of oscillation driving assemblies arranged on the probe pipeline; the oscillation driving assembly comprises a hammering structure and a wear-reducing wheel group which is distributed at intervals on at least one side of the hammering structure; the hammering structure is used for generating oscillation through a hammering body, and the oscillation is converted into impact to drive the probe pipeline to axially displace in the spiral heat transfer pipe; the wear-reducing wheel group is in contact with the inner wall of the spiral heat transfer pipe, and the friction force of the probe pipeline on the inner wall of the spiral heat transfer pipe is reduced. The probe pipeline is driven to travel in the spiral heat transfer pipe by fluid impact oscillation, the friction force of the probe pipeline on the inner wall of the spiral heat transfer pipe is reduced by cooperating with the wear-reducing wheel group, the probe can be deeply inserted into the pipeline for a longer distance, the inspection requirement is met, and the risk of foreign matters is not prone to be caused.

Description

Technical Field

[0001] This invention relates to the field of inspection technology for heat transfer tubes in nuclear power plant heat exchangers, and more particularly to an inspection device for spiral heat transfer tubes. Background Technology

[0002] Insertion probes are used in the inspection of various pipelines, especially spiral heat transfer tubes, for the purpose of performing non-destructive internal inspections of heat exchanger tubes, particularly spiral tubes. Spiral tube heat exchangers are characterized by their extremely long spiral tubes and numerous spiral turns. When inserting the probe, the resistance increases rapidly with each insertion, eventually reaching a point where it cannot penetrate further. Therefore, conventional insertion probes cannot penetrate long distances into the spiral tube. Furthermore, after excessive insertion and numerous spiral turns, the probe is prone to self-locking during removal, leading to a sharp increase in friction that makes it impossible to pull out. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a spiral heat transfer tube inspection device that uses impact vibration to allow the probe of the probe tube to smoothly enter and exit the spiral tube for inspection.

[0004] The technical solution adopted by the present invention to solve its technical problem is: to provide a spiral heat transfer tube, including a probe line for entering and exiting the spiral heat transfer tube, and at least one set of oscillation drive components disposed on the probe line;

[0005] The oscillation drive assembly includes a hammering structure and a set of anti-wear wheels spaced apart on at least one side of the hammering structure;

[0006] The hammering structure is used to generate high-frequency oscillations through the hammer body, and convert the oscillations into impacts to drive the probe pipeline to make axial displacement within the spiral heat transfer tube.

[0007] The friction-reducing wheel assembly contacts the inner wall of the spiral heat transfer tube, reducing the friction of the probe line on the inner wall of the spiral heat transfer tube.

[0008] In some embodiments, the hammering structure includes an outer cylinder, an inner cylinder disposed inside the outer cylinder and sleeved on the probe pipeline, a first impactor and a second impactor connected to the inner cylinder and cooperating at opposite ends of the outer cylinder, and a hammering body movably disposed between the outer cylinder and the inner cylinder;

[0009] The hammer body divides the cavity between the outer cylinder and the inner cylinder into a first inner cavity and a second inner cavity. The first inner cavity is located between the first impacted body and the hammer body, and the second inner cavity is located between the second impacted body and the hammer body.

[0010] The hammer body is provided with a first flow channel and a second flow channel; the first flow channel connects the first inner cavity and the probe pipeline, allowing fluid to enter the first inner cavity through the probe pipeline and the first flow channel, driving the hammer body to move towards the second inner cavity to hammer the second object being struck; the second flow channel connects the second inner cavity and the probe pipeline, allowing fluid to enter the second inner cavity through the probe pipeline and the second flow channel, driving the hammer body to move towards the first inner cavity to hammer the first object being struck.

[0011] In some embodiments, the end face of the hammer body facing the first inner cavity is provided with at least one first channel, the first channel extending into the hammer body and penetrating the inner surface of the hammer body facing the inner cylinder to form the first flow channel;

[0012] The end face of the hammer body facing the second inner cavity is provided with at least one second channel, the second channel extends into the interior of the hammer body and penetrates the inner surface of the hammer body facing the inner cylinder to form the second flow channel;

[0013] The inner cylinder is provided with at least one inlet hole, which is used to communicate with the first flow channel or the second flow channel; the first flow channel is connected to the probe pipeline through the inlet hole, and the second flow channel is connected to the probe pipeline through the inlet hole.

[0014] In some embodiments, at least one first drain hole is provided on the outer cylinder at a position corresponding to the first inner cavity, and at least one second drain hole is provided on the outer cylinder at a position corresponding to the second inner cavity;

[0015] When the first flow channel is connected to the inlet hole, the hammer body closes the first outlet hole;

[0016] When the first drain hole is in communication with the first inner cavity, the opening of the first flow channel on the inner surface of the hammer body is offset from the inlet hole;

[0017] When the second flow channel is connected to the inlet hole, the hammer body closes the second outlet hole;

[0018] When the second drain hole is in communication with the second inner cavity, the opening of the second flow channel on the inner surface of the hammer body is offset from the inlet hole.

[0019] In some embodiments, the anti-friction wheel assembly includes at least one vertical anti-friction wheel and at least one angular anti-friction wheel arrayed on the probe pipeline.

[0020] In some embodiments, the oscillation drive assembly further includes traction shuttles spaced apart on at least one side of the hammering structure.

[0021] In some embodiments, the traction shuttle assembly includes at least one saturated traction shuttle and at least one grooved traction shuttle; at least one of the saturated traction shuttles is located on the probe side of the hammering structure away from the probe pipeline, and at least one of the grooved traction shuttles is located on the probe side of the hammering structure facing the probe pipeline.

[0022] In some embodiments, the main body of the probe pipeline is selected from a spiral corrugated pipe, a spring tube, or a Teflon pipe.

[0023] In some embodiments, the spiral heat transfer tube inspection device further includes a wire sweeper, which is installed on the end of the spiral heat transfer tube and is used to control the speed at which the probe tube is extended and retracted.

[0024] In some embodiments, the spiral heat transfer tube inspection device further includes a pressurizing mechanism disposed between the wire sweeper and the end of the spiral heat transfer tube, the pressurizing mechanism being used to provide a flowable fluid medium for the spiral heat transfer tube inspection device to drive the probe line in and out of the spiral heat transfer tube.

[0025] In some embodiments, the spiral heat transfer tube inspection device further includes a circulation pipe connected to both ends of the spiral heat transfer tube and a bidirectional circulation pump disposed on the circulation pipe.

[0026] The beneficial effects of this invention are as follows: By setting a hammering structure on the probe line, the probe line can be driven to move inside the spiral heat transfer tube by the impact and vibration of fluid (such as gas). With the help of the anti-friction wheel set, the friction of the probe line on the inner wall of the spiral heat transfer tube is reduced. Compared with the traditional insertion probe line, it is less likely to accumulate resistance on the tube wall, so that the probe can penetrate into the pipe a longer distance, meet the inspection requirements, and reduce the risk of foreign objects. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the structure of a spiral heat transfer tube inspection device according to an embodiment of the present invention on a spiral heat transfer tube;

[0029] Figure 2 This is a schematic diagram of the structure of a spiral heat transfer tube inspection device according to an embodiment of the present invention;

[0030] Figure 3 This is an axial cross-sectional view of a spiral heat transfer tube inspection device according to an embodiment of the present invention inside a spiral heat transfer tube;

[0031] Figure 4 This is a schematic diagram of the hammering structure in a spiral heat transfer tube inspection device according to an embodiment of the present invention;

[0032] Figure 5 yes Figure 4 The diagram shows a cross-sectional view of the hammer-driven structure in one axial direction.

[0033] Figure 6 yes Figure 4 A schematic diagram of the cross-sectional structure of the hammer-driven structure in another axial direction.

[0034] Figure 7 This is a schematic diagram of the vertical anti-friction wheel in a spiral heat transfer tube inspection device according to an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the angle-reducing grinding wheel in a spiral heat transfer tube inspection device according to an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the saturated traction shuttle in a spiral heat transfer tube inspection device according to an embodiment of the present invention;

[0037] Figure 10 This is a schematic diagram of the grooved traction shuttle in a spiral heat transfer tube inspection device according to an embodiment of the present invention. Detailed Implementation

[0038] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0039] The spiral heat transfer tube inspection device of the present invention is used for inspecting spiral heat transfer tubes of nuclear power plant heat exchangers, including items such as eddy currents.

[0040] like Figures 1 to 3 As shown, the spiral heat transfer tube inspection device of some embodiments of the present invention includes a probe line and at least one set of oscillation drive components disposed on the probe line 10.

[0041] The probe line 10 is used to enter and exit the spiral heat transfer tube 100 by means of blow-applied cable or liquid-applied cable, so that the probe on it can smoothly reach the detection area to check the spiral heat transfer tube 100 for items such as eddy currents. The oscillation drive assembly is set on the probe line 10 to drive the probe line 10 to travel inside the spiral heat transfer tube 100 while avoiding contact between the probe line 10 and the inner wall surface of the spiral heat transfer tube 100.

[0042] Preferably, at least one oscillation drive assembly is provided at the front end of the probe line 10 (the end where the probe 11 is located) to drive the probe on the probe line 10 to smoothly reach the detection area. The oscillation drive assembly maintains a certain distance from the probe at the front end of the probe line 10 to prevent high-frequency impact from affecting the signal acquisition of the probe coil on the probe.

[0043] The main body of the probe line 10 is made of spiral corrugated tubing, spring tubing or Teflon tubing, which has the characteristics of good toughness and good pressure resistance (such as air pressure).

[0044] Furthermore, the oscillation drive assembly may include a hammering structure 20 and a set of anti-friction wheels spaced apart on at least one side of the hammering structure 20. The hammering structure 20 is used to generate high-frequency oscillations through the hammer body 25, converting the oscillations into impacts to drive the probe line 10 to make axial displacement within the spiral heat transfer tube 100, for example, to advance into the spiral heat transfer tube 100. The anti-friction wheels contact the inner wall of the spiral heat transfer tube 100, reducing the frictional force of the probe line 10 on the inner wall of the spiral heat transfer tube 100.

[0045] In some embodiments, such as Figures 4 to 6 As shown, the hammering structure 20 includes an outer cylinder 21, an inner cylinder 22, a first impactor 23, a second impactor 24, and a hammering body 25. The inner cylinder 22 and the outer cylinder 21 are fitted together, with the inner cylinder 22 located inside the outer cylinder 21 and fitted onto the probe line 10, and fixed relative to the probe line 10. The first impactor 23 and the second impactor 24 are connected to the inner cylinder 22 and respectively fit at opposite ends of the outer cylinder 21, sealing both ends of the outer cylinder 21. The hammering body 25 is movably disposed between the outer cylinder 21 and the inner cylinder 22, and is also located between the first impactor 23 and the second impactor 24; the hammering body 25 can move back and forth between the first impactor 23 and the second impactor 24.

[0046] On the probe line 10, the outer cylinder 21, the inner cylinder 22, the first impact object 23, and the second impact object 24 are all fixed relative to the probe line 10. At least one of the first impact object 23 and the second impact object 24 can be integrally formed with the inner cylinder 22.

[0047] The hammer body 25 divides the cavity between the outer cylinder 21 and the inner cylinder 22 into a first inner cavity 201 and a second inner cavity 202. The first inner cavity 201 is located between the first impacted object 23 and the hammer body 25, and the second inner cavity 202 is located between the second impacted object 24 and the hammer body 25. The hammer body 25 is provided with a first flow channel 210 and a second flow channel 220. The first flow channel 210 connects the first inner cavity 201 and the probe line 10, allowing fluid to enter the first inner cavity 201 through the probe line 10 and the first flow channel 210, driving the hammer body 25 to move towards the second inner cavity 202 to hammer the second impacted object 24. The second flow channel 220 connects the second inner cavity 202 and the probe line 10, allowing fluid to enter the second inner cavity 202 through the probe line 10 and the second flow channel 220, driving the hammer body 25 towards the first inner cavity 201 to hammer the first impacted object 23.

[0048] Taking airflow as an example:

[0049] When airflow enters the first inner cavity 201 and the second inner cavity 202, it causes the hammer body 25 to vibrate at a high frequency, and the amplitude of the vibration increases with the increase of air pressure. When the amplitude reaches a certain level, it impacts the nearby hammer receivers (the first impact receiver 23 and the second impact receiver 24). The hammer body 25 contacts the first impact receiver 23 and the second impact receiver 24 at both ends. When the impact intensity increases to a certain level, the probe line 10 connecting the hammer receivers (the first impact receiver 23 and the second impact receiver 24) forms a distance displacement, and the hammer body 25 forms the next impact under the gas injection.

[0050] Under high-frequency impact, the deformation accumulated in the probe line 10 near the hammer impact receiver within the spiral heat transfer tube 100 is evenly spread out, forming an approximately continuous forward or backward movement. As the probe passes through the detection zone, it records the detected pipe signal, completing the inspection of the spiral heat transfer tube 100.

[0051] High-frequency oscillation can effectively reduce the contact opportunity between the probe line 10 and the inner wall of the spiral heat transfer tube 100, thereby reducing its frictional resistance and playing a role in oscillation and friction reduction.

[0052] Specifically, in the hammering structure 20, the end face of the hammer body 25 facing the first inner cavity 201 is provided with at least one first channel. The first channel extends into the hammer body 25 and penetrates the inner surface of the hammer body 25 facing the inner cylinder 22, forming an opening on the inner surface. The first channel and the opening form a first flow channel 210. The end face of the hammer body 25 facing the second inner cavity 202 is provided with at least one second channel. The second channel extends into the hammer body 25 and penetrates the inner surface of the hammer body 25 facing the inner cylinder 22, forming an opening on the inner surface. The second channel and the opening form a second flow channel 220.

[0053] The inner cylinder 22 is provided with at least one inlet hole 221. Preferably, the inlet hole 221 is located within the coverage area of ​​the hammer body 25 on the inner cylinder 22, and the inlet hole 221 is always located inside the hammer body 25 during the reciprocating motion of the hammer body 25. The inlet hole 221 is used to communicate with the first flow channel 210 or the second flow channel 220; the first flow channel 210 is connected to the probe line 10 through the inlet hole 221, and the second flow channel 220 is connected to the probe line 10 through the inlet hole 221. Fluid (such as airflow) is injected from the end of the probe line 10, flows along the probe line 10, and enters the first flow channel 210 or the second flow channel 220 through the inlet hole 221.

[0054] The outer cylinder 21 is provided with at least one first drain hole 211 at a position corresponding to the first inner cavity 201. The first drain hole 211 is used for the discharge of fluid in the first inner cavity 201, such as venting or draining liquid. The outer cylinder 21 is provided with at least one second drain hole 212 at a position corresponding to the second inner cavity 202. The second drain hole 212 is used for the discharge of fluid in the second inner cavity 202, such as venting or draining liquid.

[0055] The inlet hole 221 is used to communicate with the first flow channel 210 or the second flow channel 220, that is, the inlet hole 221 will not be simultaneously connected to the first flow channel 210 and the second flow channel 220.

[0056] When the first flow channel 210 is connected to the inlet hole 221, the second flow channel 220 is isolated from the inlet hole 221 (not connected); the outer surface of the hammer body 25 is inside the location of the first drain hole 211 and covers the first drain hole 211, thereby closing the first drain hole 211. At this time, the first inner cavity 201, the first flow channel 210 and the inlet hole 221 are in a state of sequential connection. When fluid is filled into the probe line 10, the fluid enters the first inner cavity 201 along the probe line 10, through the inlet hole 221 and the first flow channel 210, and can push the hammer body 25 to move towards the second inner cavity 202. When the pressure reaches a sufficiently high level, it pushes the hammer body 25 to impact the second impacted body 24.

[0057] When the hammer body 25 moves towards the second inner cavity 202 and away from the first drain hole 211, the first drain hole 211 opens and communicates with the first inner cavity 201. The fluid in the first inner cavity 201 is discharged through the first drain hole 211. At this time, the opening of the first flow channel 210 on the inner surface of the hammer body 25 is offset from the inlet hole 221, so that the first flow channel 210 is not connected with the inlet hole 221, and at the same time, the inlet hole 221 is connected with the second flow channel 220. When fluid is continuously filled into the probe line 10, the fluid in the probe line 10 enters the second inner cavity 202 through the inlet hole 221 and the second flow channel 220, pushing the hammer body 25 towards the first inner cavity 201. When the pressure reaches a sufficiently high level, it pushes the hammer body 25 to impact the first impacted object 23.

[0058] When the hammer body 25 moves towards the first inner cavity 201 and away from the second drain hole 212, the second drain hole 212 opens and connects with the second inner cavity 202. The fluid in the second inner cavity 202 is discharged through the second drain hole 212. At this time, the opening of the second flow channel 220 on the inner surface of the hammer body 25 is offset from the inlet hole 221, so that the second flow channel 220 is not connected with the inlet hole 221, and at the same time, the inlet hole 221 is connected with the first flow channel 210. The above reciprocating motion causes the hammer body 25 to vibrate at high frequency, alternately impacting the first impacted body 23 and the second impacted body 24, causing the probe pipeline 10 to form a distance displacement. The deformation accumulated in the spiral heat transfer tube 100 is evenly spread out to form an approximately continuous forward or backward motion.

[0059] In one alternative embodiment, the hammer body 25 is provided with two first flow channels 210 and two second flow channels 220; the two first flow channels 210 are located on opposite sides of one end of the hammer body 25, and the two second flow channels 220 are located on opposite sides of the other end of the hammer body 25, and the center line connecting the two first flow channels 210 is perpendicular to the center line connecting the two second flow channels 220. The inner cylinder 22 is provided with two inlet holes 221, and each inlet hole 221 is connected to one of the first flow channels 210 or one of the second flow channels 220.

[0060] More preferably, the inner surface of the hammer body 25 is provided with two axially distributed annular grooves, namely a first annular groove 251 and a second annular groove 252. The first annular groove 251 is connected to the first flow channel 210, and the second annular groove 252 is connected to the second flow channel 220. This allows the inlet hole 221 to be connected to the first flow channel 210 through the first annular groove 251 without being directly opposite the opening of the first flow channel 210 on the inner surface of the hammer body 25; the inlet hole 221 can be connected to the second flow channel 220 through the second annular groove 252 without being directly opposite the opening of the second flow channel 220 on the inner surface of the hammer body 25.

[0061] Combination Figure 2 , Figure 3 , Figure 7 and Figure 8 The friction-reducing wheel assembly serves as an auxiliary friction-reducing structure on the probe line 10, reducing the frictional force between the probe line 10 and the inner wall of the spiral heat transfer tube 100. The friction-reducing wheel assembly includes at least one vertical friction-reducing wheel 30 and at least one angular friction-reducing wheel 40 arrayed on the probe line 10; the vertical friction-reducing wheel 30 and the angular friction-reducing wheel 40 separate the probe line 10 from the inner wall of the spiral heat transfer tube 100. The vertical friction-reducing wheel 30 is mainly formed by a wheel frame and several bearings arranged on its outer periphery, with the bearings parallel to the axis of the wheel frame; the bearings can rotate relative to the wheel frame and roll against the inner wall of the spiral heat transfer tube 100. The angular friction-reducing wheel 40 is mainly formed by a wheel frame and several bearings arranged on its outer periphery, with the bearings forming an angle with the axis of the wheel frame, providing circumferential torque while rolling against the inner wall of the spiral heat transfer tube 100.

[0062] The vertical anti-friction wheel 30 works in conjunction with the angle anti-friction wheel 40 to achieve vertical anti-friction while also allowing circumferential rotation. The angle anti-friction wheel 40 generates circumferential torque by rotating the probe line 10 when the probe line 10 needs to move forward or backward. The friction between the angle anti-friction wheel 40 and the inner wall of the spiral heat transfer tube 100 causes the probe line 10 to unfold.

[0063] Preferably, the radial filling coefficient of the friction-reducing wheel assembly within the spiral heat transfer tube 100 is greater than the critical coefficient suitable for air-laid cables. Air-laid / liquid-laid cables refer to a technology that utilizes the flow of fluid media within a pipe to allow cables to pass through it.

[0064] Depending on the option, the oscillation drive assembly may further include traction shuttles spaced apart on at least one side of the hammering structure 20. In some embodiments, combined with Figure 2 , Figure 3 , Figure 9 and Figure 10 The traction shuttle assembly may include at least one saturated traction shuttle 50 and at least one grooved traction shuttle 60. At least one saturated traction shuttle 50 is located on the side of the hammer structure 20 away from the probe line 10, opposite to the probe 11. At least one grooved traction shuttle 60 is located on the side of the hammer structure 20 facing the probe line 10, opposite to the probe 11. The saturated traction shuttle 50 is formed by a sealing soft body and a wire mesh wrapped around the outer surface of the sealing soft body, providing a fluid seal. The grooved traction shuttle 60 is a traction shuttle with a groove in the middle, which can store fluid and provide lubrication. Fluid (gas or liquid) entering the spiral heat transfer tube 100 reaches the saturated traction shuttle 50 and then enters the hammer structure 20 from the middle.

[0065] exist Figure 2 and Figure 3 In the illustrated embodiment, a hammering structure 20 is provided at the front end of the probe line 10. A saturation traction shuttle 50 is arranged on the side of the hammering structure 20 away from the probe 11, and a grooved traction shuttle 60 is arranged on the side of the hammering structure 20 facing the probe 11. Vertical anti-friction wheels 30 and angular anti-friction wheels 40 are arranged in sequence between the hammering structure 20 and the grooved traction shuttle 60. A vertical anti-friction wheel 30 is arranged between the grooved traction shuttle 60 and the probe 11. It is understood that the arrangement and number of the components of the oscillation drive assembly on the probe line 10 are not limited to... Figure 2 and Figure 3 As shown.

[0066] In some embodiments, reference Figure 1 The spiral heat transfer tube inspection device may further include a wire sweeper 70, which is installed on the end of the spiral heat transfer tube 100. The wire sweeper 70 is used to control the speed of the probe wire 10's extension and retraction, and to assist in providing power for the probe wire 10 to enter and exit the spiral heat transfer tube 100. Its main function is to control the speed. Combined with... Figure 1 and Figure 2 The sweeper 70 drives the probe line 10 passing through the middle forward or backward by a tracked brush; or, as needed, the sweeper 70 may use two rows of rollers with intervals opposite each other instead of a tracked brush, the rotation of which drives the probe line 10 passing through the middle forward or backward.

[0067] The sweeper 70 works in conjunction with the traction shuttle assembly. The traction shuttle assembly has a certain sealing effect inside the spiral heat transfer tube 100 and has a small coefficient of friction, which can increase the ability of the fluid to drag the probe line 10 during cable blowing and liquid cable laying.

[0068] In some embodiments, reference Figure 1 The spiral heat transfer tube inspection device may also include a pressurizing mechanism 80; the pressurizing mechanism 80 is installed at the end of the spiral heat transfer tube 100 and is used to provide a flowable fluid medium for the spiral heat transfer tube inspection device, serving as the main power to drive the probe line 10 in and out of the spiral heat transfer tube 100. The fluid medium includes gas and liquid, and gas or liquid can be selected as the main power to drive the probe line 10 in and out of the spiral heat transfer tube 100 according to actual needs (i.e., gas-coated cable or liquid-coated cable).

[0069] The pressurizing mechanism 80 has a pressurizing channel inside, and an inlet 81 is provided on the pressurizing mechanism 80 to connect to the pressurizing channel. At the end of the spiral heat transfer tube 100, the pressurizing channel is connected to the spiral heat transfer tube 100. When gas is introduced through the inlet 81 as an air inlet (air-insulated cable mode), the gas enters the spiral heat transfer tube 100 along the pressurizing channel, which not only drives the probe line 10 to advance in the spiral heat transfer tube 100, but also enters the hammer structure 20 when the gas reaches the position of the hammer structure 20, thereby driving the hammer body 25 to reciprocate.

[0070] In an embodiment of the spiral heat transfer tube inspection device having a wire sweeper 70 and a pressurizing mechanism 80, the pressurizing mechanism 80 and the wire sweeper 70 are sequentially installed on the end of the spiral heat transfer tube 100.

[0071] A wire sweeper 70 can be further installed with a wire winder 71, which is constructed using a figure-eight winding method. The probe cable 10 is wrapped and stored on the wire winder 71 in a figure-eight winding manner. During the operation of the wire sweeper 70, the probe cable 10 is pulled into the spiral heat transfer tube 100.

[0072] Furthermore, the spiral heat transfer tube inspection device may also include a circulation pipe 90 connected to both ends of the spiral heat transfer tube 100, and a bidirectional circulation pump 91 installed on the circulation pipe 90; the bidirectional circulation pump 91 is used to drive the bidirectional flow of the fluid medium. The two ends of the circulation pipe 90 are respectively connected to the two ends of the spiral heat transfer tube 100, thereby forming a circulation loop. Under the power provided by the bidirectional circulation pump 91, the fluid (airflow or liquid flow) can circulate in this circulation loop. When a wire cleaner 70 is installed at the end of the spiral heat transfer tube 100, the circulation pipe 90 is connected to the wire cleaner 70, and a circulation loop is formed by the wire cleaner 70 connecting to the spiral heat transfer tube 100.

[0073] In liquid-coated cable mode, the liquid circulates within the loop formed by the circulation pipe 90 and the spiral heat transfer pipe 100, with the bidirectional circulation pump 91 providing power for the liquid flow. The liquid flow propels the probe cable 10 within the spiral heat transfer pipe 100, and the oscillation drive assembly assists the probe 11 within the spiral heat transfer pipe 100 to extend and travel smoothly to the detection area. The spiral heat transfer pipe inspection device of this invention can be used to advance the probe in both blow-coated and liquid-coated cable modes, utilizing compressed air for blowing or injecting deionized water to create fluid dragging and achieve a friction reduction effect. The advantage of this invention is that it can generate its own impact oscillation during the continuous spiral pipe insertion process, making the friction between the nearby probe cable and the pipe wall a form of kinematic friction.

[0074] When the probe line 10 is retrieved after the inspection of the spiral heat transfer tube 100, it is difficult to pull the probe back directly due to the accumulated friction. At this time, the probe can be pulled back by using a reverse blowing cable / liquid-coated cable and a vacuum suction tube.

[0075] In summary, this invention utilizes the principle of fluid hammering oscillation device to set up an oscillation drive component on the probe pipeline, which uniformly dissipates the resistance deformation that the probe pipeline continuously enters into the pipe (such as a spiral heat transfer tube), and has the characteristics of stable operation and not easily damaged.

[0076] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A spiral heat transfer tube inspection device, characterized in that, Includes a probe line for entering and exiting a spiral heat transfer tube, and at least one set of oscillation drive components disposed on the probe line; The oscillation drive assembly includes a hammering structure and a set of anti-wear wheels spaced apart on at least one side of the hammering structure; The hammering structure is used to generate high-frequency oscillations through the hammer body, and convert the oscillations into impacts to drive the probe pipeline to make axial displacement within the spiral heat transfer tube. The friction-reducing wheel assembly contacts the inner wall of the spiral heat transfer tube, reducing the friction of the probe line on the inner wall of the spiral heat transfer tube; The hammering structure includes an outer cylinder, an inner cylinder disposed inside the outer cylinder and sleeved on the probe pipeline, a first impactor and a second impactor connected to the inner cylinder and fitted at opposite ends of the outer cylinder, and a hammering body movably disposed between the outer cylinder and the inner cylinder. The hammer body divides the cavity between the outer cylinder and the inner cylinder into a first inner cavity and a second inner cavity. The first inner cavity is located between the first impacted body and the hammer body, and the second inner cavity is located between the second impacted body and the hammer body. The hammer body is provided with a first flow channel and a second flow channel; the first flow channel connects the first inner cavity and the probe pipeline, allowing fluid to enter the first inner cavity through the probe pipeline and the first flow channel, driving the hammer body to move towards the second inner cavity to hammer the second object being struck; the second flow channel connects the second inner cavity and the probe pipeline, allowing fluid to enter the second inner cavity through the probe pipeline and the second flow channel, driving the hammer body to move towards the first inner cavity to hammer the first object being struck.

2. The spiral heat transfer tube inspection device according to claim 1, characterized in that, The hammer body has at least one first channel on its end face facing the first inner cavity. The first channel extends into the hammer body and penetrates the inner surface of the hammer body facing the inner cylinder to form the first flow channel. The end face of the hammer body facing the second inner cavity is provided with at least one second channel, the second channel extends into the interior of the hammer body and penetrates the inner surface of the hammer body facing the inner cylinder to form the second flow channel; The inner cylinder is provided with at least one inlet hole, which is used to communicate with the first flow channel or the second flow channel; the first flow channel is connected to the probe pipeline through the inlet hole, and the second flow channel is connected to the probe pipeline through the inlet hole.

3. The spiral heat transfer tube inspection device according to claim 2, characterized in that, The outer cylinder is provided with at least one first drain hole at the position corresponding to the first inner cavity, and the outer cylinder is provided with at least one second drain hole at the position corresponding to the second inner cavity; When the first flow channel is connected to the inlet hole, the hammer body closes the first outlet hole; When the first drain hole is in communication with the first inner cavity, the opening of the first flow channel on the inner surface of the hammer body is offset from the inlet hole; When the second flow channel is connected to the inlet hole, the hammer body closes the second outlet hole; When the second drain hole is in communication with the second inner cavity, the opening of the second flow channel on the inner surface of the hammer body is offset from the inlet hole.

4. The spiral heat transfer tube inspection device according to claim 1, characterized in that, The anti-friction wheel assembly includes at least one vertical anti-friction wheel and at least one angular anti-friction wheel arranged in an array on the probe pipeline.

5. The spiral heat transfer tube inspection device according to claim 1, characterized in that, The oscillation drive assembly also includes traction shuttle groups spaced apart on at least one side of the hammering structure.

6. The spiral heat transfer tube inspection device according to claim 5, characterized in that, The traction shuttle assembly includes at least one saturated traction shuttle and at least one grooved traction shuttle; at least one of the saturated traction shuttles is located on the probe side of the hammering structure away from the probe pipeline, and at least one of the grooved traction shuttles is located on the probe side of the hammering structure facing the probe pipeline.

7. The spiral heat transfer tube inspection device according to claim 1, characterized in that, The main body of the probe pipeline is made of spiral corrugated tubing, spring tubing, or Teflon tubing.

8. The spiral heat transfer tube inspection device according to any one of claims 1-7, characterized in that, The spiral heat transfer tube inspection device also includes a wire sweeper, which is installed on the end of the spiral heat transfer tube and is used to control the speed of the probe tube's extension and retraction.

9. The spiral heat transfer tube inspection device according to claim 8, characterized in that, The spiral heat transfer tube inspection device further includes a pressurizing mechanism disposed between the wire sweeper and the end of the spiral heat transfer tube. The pressurizing mechanism provides a flowable fluid medium to the spiral heat transfer tube inspection device to drive the probe line in and out of the spiral heat transfer tube; and / or, The spiral heat transfer tube inspection device also includes a circulation pipe connected to both ends of the spiral heat transfer tube and a bidirectional circulation pump installed on the circulation pipe.

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