A nuclear industry bolt strength reduction detection device

Abstract

The present invention discloses a nuclear industry bolt strength reduction degree detection device, which relates to the technical field of bolt strength detection, and comprises a main body, a cover tube is arranged on the outside of the main body, a magnetic column disk, a control rod and an exchange disk are arranged inside the cover tube from top to bottom, the magnetic column disk and the exchange disk are connected by a control rod, a plurality of magnetic columns are arranged in an annular shape below the magnetic column disk, a detection mechanism, a removal component, a cleaning component and an installation component are distributed in an annular shape on the exchange disk, and an ultrasonic detection element is installed inside the detection mechanism. During the cleaning of the mounting hole, the present invention forms a closed space on one side of the mounting hole, thereby realizing that the mounting hole is cleaned by the cleaning component in a closed environment, and maintenance oil is applied after cleaning, so that when a new bolt is subsequently installed, the gap between the mounting hole and the bolt is filled with maintenance oil, thereby reducing the negative impact of the harsh environment on the mounting hole and the bolt.

Description

Technical Field

[0001] The invention relates to the technical field of bolt strength detection, in particular to a device for detecting the degree of bolt strength reduction in the nuclear industry. Background Art

[0002] The transmission loss of ultrasonic waves in solids is very small, and the detection depth is large. Because ultrasonic waves will be reflected and refracted on heterogeneous interfaces, especially they cannot pass through gas-solid interfaces. If there are defects such as pores, cracks, delamination (gas in the defects) or inclusions in the metal, the ultrasonic waves will be fully or partially reflected when they propagate to the interface between the metal and the defects. The reflected ultrasonic waves are received by the probe and processed by the circuit inside the instrument to form waveforms of different heights and certain spacings. The depth, position and shape of the defects in the workpiece can be judged based on the changing characteristics of the waveforms.

[0003] In the nuclear industry, there are some bolts that are in harsh environments such as acid and moisture for a long time. Bolts corrode rapidly in acid and moisture environments, and will break if their strength drops too much. During maintenance, the strength surplus should be detected in time. If they break during the detection process, the bolts of the same batch or the same standard should be replaced in time. When the equipment is inspecting or even replacing the bolts, it needs to be inserted into the acid and moisture environment to work. The harsh environment in which the bolts are located places high demands on the use of existing equipment. Summary of the invention

[0004] The purpose of the present invention is to provide a nuclear industry bolt strength reduction degree detection device to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A nuclear industry bolt strength reduction degree detection device, comprising a main body, a cover cylinder is arranged outside the main body, a magnetic column disk, a control rod and an exchange disk are arranged inside the cover cylinder from top to bottom, the magnetic column disk and the exchange disk are connected by a control rod, and a plurality of magnetic columns are arranged in an annular shape below the magnetic column disk;

[0006] The exchange disk is provided with a detection mechanism, a removal component, a cleaning component and an installation component distributed in a ring; an ultrasonic detection element is installed inside the detection mechanism; the removal component and the installation component respectively complete the removal and installation of the bolts; a maintenance liquid output structure is installed on one side of the cleaning component; the cleaning component is used to clean the bolt installation holes; the detection mechanism, the removal component, the cleaning component and the installation component are arranged at the same distance on the exchange disk, and each mechanism or component is connected to the exchange disk by a single telescopic drive rod.

[0007] Furthermore, the magnetic column disk is composed of an inner ring and an outer ring, a control rod is movably installed at the lower middle part of the inner ring, a plurality of spring blocks are arranged on the outer side of the exchange disk, an oblique groove and a straight groove are opened inside the cover tube, the oblique groove and the straight groove are alternately connected, the spring block is slidably connected with the oblique groove and the straight groove, and the end depth of the oblique groove and the straight groove is less than the initial end depth; before using the detection equipment, the cover tube needs to be installed on the bolt to be detected, and the detection mechanism is kept directly above the bolt. Due to the existence of the cover tube, the required bolt is located in the sealed space, and then the control rod can be started to work. The control rod is used to control the lifting and lowering of the exchange disk. The control rod is extended to the maximum stroke, and then the driving rod controls the detection structure to descend to fit with the bolt. An ultrasonic detection element is arranged inside the detection structure, and the ultrasonic detection element detects the bolt and feeds back the detection result to the main body, which determines whether the bolt needs to be replaced;

[0008] When the main body determines that the bolt needs to be replaced, the drive rod and the control rod are synchronously recovered. Since the contact surfaces of the exchange disk and the cover tube are provided with oblique grooves, straight grooves and spring blocks, the oblique grooves and straight grooves are alternately connected, and the end depths of the oblique grooves and the straight grooves are less than the initial depths, the spring block is in the straight groove during the descent of the exchange disk, so that the exchange disk descends vertically under the drive of the control rod. When the exchange disk descends to the lowest point, the end depth of the straight groove is less than the initial depth of the oblique groove, so that when the exchange disk rises, the spring block changes from engaging with the straight groove to engaging with the oblique groove, thereby realizing the synchronous deflection of the exchange disk during the ascent, until the exchange disk rises to the highest point, the detection mechanism changes to the removal assembly directly above the bolt.

[0009] Furthermore, an annular rack is provided on the outer side of the magnetic column disk and the exchange disk, and a spring sleeve rod is provided between the exchange disk and the annular rack, and the length of the spring sleeve rod is equal to half of the movement stroke of the control rod; since the length of the spring sleeve rod is equal to half of the movement stroke of the control rod, and the magnetic column disk is composed of an inner ring and an outer ring, and the inner ring and the outer ring are rotatably connected, when the control rod is recovered to half of the stroke, the annular rack on the upper side of the exchange disk is meshed with the annular rack below the magnetic column disk, so that when the control rod is recovered to the remaining stroke, the exchange disk drives the magnetic column disk to deflect synchronously, and as the distance between the exchange disk and the magnetic column disk continues to decrease, the spring inside the spring sleeve rod is continuously compressed, and the length of the spring sleeve rod is synchronously reduced;

[0010] The exchange disk descends again, and the removal assembly takes out the bolts that need to be replaced. The exchange disk rises again, and the magnetic column disk deflects synchronously. At this time, the two magnetic columns under the magnetic column disk correspond to the removal assembly and the installation assembly respectively, and the corresponding manner is on the same vertical midline. Among them, the magnetic column corresponding to the driven removal assembly attracts the bolts that have just been taken out, so that the bolts that have just been taken out are separated from the removal assembly. Secondly, there are bolts that need to be replaced under the magnetic column corresponding to the installation assembly. An electromagnet is arranged inside the magnetic column. The magnetic column above the installation assembly is powered off, and the new bolts under the magnetic column fall naturally and are connected to the installation assembly.

[0011] Furthermore, the cleaning assembly comprises a round tube, a movable tube, a hollow sleeve and a cleaning sheet, a cavity exists at the connection between the round tube and the movable tube, a connecting spring is arranged inside the cavity, and the cavity is connected with the cleaning sheet through the hollow sleeve; after the removal assembly is completed, the exchange plate rises and deflects, and the removal assembly is transformed into the cleaning assembly directly above the bolt hole, the exchange plate descends next time, and the driving rod extends synchronously at the same time, the cleaning assembly extends into the bolt hole, and the cleaning assembly cleans the bolt hole;

[0012] The round tube and the movable tube are socketed. Driven by the continuous extension of the driving rod, the lower end surface of the movable tube fits with the lower end surface of the bolt hole, and the spring between the round tube and the movable tube is compressed. The volume of the cavity is constantly decreasing. Since the cavity is connected with the hollow sleeve and the cleaning sheet, the hollow sleeve is extended to balance the air pressure inside the cleaning assembly until the outer wall surface of the cleaning sheet contacts the inner wall of the bolt hole. The hollow sleeve stops extending. An air pressure detection element is installed inside the cavity. When the air pressure detection element detects that the air pressure inside the cleaning assembly rises to a specified value, the driving rod stops extending.

[0013] Furthermore, a plurality of balls are provided at the lower end of the movable tube, a two-way delivery pump is provided inside the circular tube, the output shaft of the water pump is connected to the movable tube, and blades and a spring shaft are provided at one end inside the hollow casing; the movable tube contacts the bottom plate of the bolt hole through the balls, and due to the presence of the balls, there is a gap between the movable tube and the bolt bottom plate. After the driving rod stops extending, the two-way delivery pump starts working, and the output shaft inside the two-way delivery pump starts working, and the delivery pump extracts impurities and solutions inside the enclosed space. The operation of the two-way delivery pump drives the movable tube to start rotating, and the movable tube is connected to the cleaning sheet through the hollow casing, so that the cleaning sheet can rotate synchronously with the movable tube as the center.

[0014] Furthermore, the blades and spring shafts are provided in two groups and are symmetrically arranged, the spring shafts are arranged on one side of the middle of the blades, the spacing of the spring shafts is less than half the width of the hollow sleeve, and the width of the blades after unfolding is less than the width of the hollow sleeve; when the airflow inside the cavity moves toward the inside of the cleaning sheet as a positive flow, the airflow needs to pass through the blades and the spring shafts during the positive flow, wherein the blades and the spring shafts are structurally arranged, the blades and the spring shafts cooperate to form a lever structure, and the airflow will contact one side surface of the blades during the positive flow, and during the positive flow, the blades on both sides of the spring shaft form a power arm and a resistance arm due to the movement of the airflow, wherein the length of the power arm is greater than the length of the resistance arm, so that the airflow drives the blades to deflect with the spring shaft as the center, until the airflow movement route is parallel to the blades, and after the deflection, the two blades are parallel, until the air pressure inside the cleaning sheet is balanced with the air pressure in the cavity, and the blades are reset under the drive of the spring shaft;

[0015] When the airflow moves from the cleaning sheet to the cavity in the reverse flow, since the length of the power arm is less than the length of the resistance arm, the blades are deflected in the reverse direction, wherein the spacing of the spring shaft is less than the length of the two power arms, so that after the two blades are deflected, the adjacent ends of the two blades fit together, thereby achieving the two blades hindering each other's deflection, and finally the two blades form a dynamic balance. After the blades form the dynamic balance, there is a gap between the end of the blade away from the spring shaft and the hollow sleeve, and the gap is used to decelerate the airflow during the reverse flow. Since the arrangement of the blades and the spring shaft constitutes a structure similar to a one-way valve, it is used to hinder the reverse flow and reduce the ability of the airflow in the cleaning sheet space to move into the cavity.

[0016] Furthermore, the cleaning sheet is hollow and consists of a rectangular sheet and a special-shaped sheet. A magnetic plate is provided at the connection between the rectangular sheet and the special-shaped sheet. The vertical cross-section of the special-shaped sheet is a parallelogram. The height of the special-shaped sheet close to the hollow sleeve is higher than the height close to the rectangular sheet. The structural setting of the cleaning sheet is that a protruding needle is provided inside the rectangular sheet. Under the guidance of the rectangular sheet, the protruding needle is perpendicular to the inner wall of the mounting hole to facilitate cleaning of the mounting hole. Secondly, during the extraction of the two-way output pump, the structural setting of the special-shaped sheet is that the lower surface of the special-shaped sheet is the working surface. The special-shaped sheet guides impurities and solutions inside the mounting hole and guides the impurities and solutions to the bottom of the movable tube. During the output of maintenance oil by the two-way output pump, the upper surface of the special-shaped sheet is the working surface to facilitate pushing excess maintenance oil to the outside of the mounting hole.

[0017] Furthermore, the rectangular sheet is provided with a plurality of protruding needles, which are slidably connected to the rectangular sheet; the rectangular sheet is provided with a plurality of protruding needles, and when the air pressure inside the cleaning sheet rises, the protruding needles are all extended under the action of the air pressure, and since the outer wall of the cleaning sheet fits with the inner wall of the bolt hole, some of the protruding needles extend into the threaded groove after fitting, and during the operation of the two-way output pump, the cleaning sheet rotates synchronously, and the protruding needles move synchronously with the cleaning sheet, and since there is a spiral thread groove inside the bolt hole, when the protruding needle cleans the inner wall of the mounting hole, the protruding needle performs reciprocating horizontal motion under the combined action of the outer wall structure of the thread groove and the air pressure inside the cleaning sheet, and the protruding needle slides horizontally inside the rectangular sheet along the outer wall structure of the thread groove, and during the movement of the protruding needle, impurities attached to the inner wall of the thread groove are cleaned, and at the same time, the two-way output pump recovers the impurities and solution in the mounting hole;

[0018] After the installation hole is cleaned, both ends of the two-way output pump are connected with control valves and corresponding connecting pipes. When the two-way output pump changes the rotation direction, the control valve works synchronously to replace the connecting pipe. One end of the connecting pipe is connected with maintenance oil. When the two-way output pump starts to rotate in the opposite direction, the drive rod shrinks synchronously by a specified length, so that the gas pressure inside the cleaning component is reduced. A magnetic plate is provided at the connection between the rectangular sheet and the special-shaped sheet. The protruding needle of the magnetic plate has an attraction effect. Due to the reduction of the air pressure inside the cleaning component, there is a difference between the attraction strength of the magnetic plate on the protruding needle and the squeezing strength of the air pressure on the protruding needle, so that the protruding needle starts to move toward the inside of the rectangular sheet, waiting for the attraction strength of the magnetic plate on the protruding needle and the squeezing strength of the air pressure on the protruding needle to reach a balance again, so that there is a gap between the thread groove at the end of the contracted protruding needle;

[0019] The bidirectional output pump injects the maintenance oil into the mounting hole, wherein the output end of the maintenance oil is aligned with the rectangular sheet, and the maintenance oil is smeared on the inner wall of the mounting hole during the rotation of the cleaning sheet. Since the cleaning sheet fits the inside of the mounting hole and there is a gap between the thread groove at the end of the protruding needle, most of the maintenance oil remains in the thread groove after the maintenance oil is applied;

[0020] After the cleaning assembly completes cleaning and applies maintenance oil, the control lever drives the exchange plate to rise and then fall again, and the mechanism directly above the mounting hole is replaced by the cleaning assembly. The mounting assembly installs the new bolt in the mounting hole applied with maintenance oil.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0022] 1. The nuclear industry bolt strength reduction degree detection equipment has bolt detection, disassembly, installation and installation hole cleaning equipment or mechanisms on the exchange plate through the setting of the control rod and the exchange plate. The control rod drives the exchange plate to rise and fall, so that the mechanisms on the exchange plate are respectively in contact with the installation holes or bolts. Secondly, the exchange plate and the adjacent structures of the cover tube cooperate with each other. The exchange plate actively forms the replacement of the mechanism during the lifting and lowering, and cooperates with the magnetic column plate and the magnetic column to synchronously realize the recovery of waste bolts and the replenishment of core bolts, so that the automation degree of this equipment during use is improved;

[0023] 2. The nuclear industry bolt strength reduction degree detection equipment, through the setting of the cleaning component, the setting of the cavity and the air flow channel inside the cleaning component, cooperates with the driving rod to realize that when the cleaning component is extended into the installation hole, the cleaning piece actively adapts to the inner diameter of the installation hole, actively cleans the inner wall of the installation hole, and cooperates with the two-way delivery pump to recycle the waste liquid inside the installation hole;

[0024] 3. The nuclear industry bolt strength reduction detection equipment actively adjusts the height of the driving rod through the setting of the cleaning piece and the driving rod, thereby changing the air pressure strength in the cleaning component, and cooperates with the two-way delivery pump to clean the thread groove of the mounting hole. During the application of maintenance oil, it cooperates with the magnetic plate to actively adjust the distance between the thread groove and the protruding needle, so that the maintenance oil can be applied to the thread groove and the excess maintenance oil can be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the top view of the exchange disk structure of the present invention;

[0028] Figure 3 It is a schematic diagram of the bottom side view of the magnetic column disk of the present invention;

[0029] Figure 4 2. It is a schematic diagram of the full cross-sectional structure of the straight groove of the present invention from top view;

[0030] Figure 5 It is a schematic diagram of the full cross-section structure of the cleaning component of the present invention;

[0031] Figure 6 It is a schematic diagram of the top view of the cleaning assembly of the present invention;

[0032] Figure 7 It is a schematic diagram of the hollow casing of the present invention in a top view and in full cross-section;

[0033] Figure 8 It is a schematic diagram of the front side structure of the vertical cross section of the cleaning piece of the present invention.

[0034] In the figure: 1. cover cylinder; 101. inclined groove; 102. straight groove; 2. magnetic column disk; 201. inner ring; 202. outer ring; 203. magnetic column; 3. control rod; 4. exchange disk; 401. spring block; 5. annular rack; 6. spring sleeve rod; 7. removal assembly; 8. cleaning assembly; 801. round tube; 802. movable tube; 803. hollow sleeve; 804. cleaning sheet; 8041. rectangular sheet; 8042. special-shaped sheet; 8043. protruding needle; 8044. magnetic plate; 9. installation assembly; 11. blade; 12. spring shaft. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-Figure 8 The present invention provides a technical solution: a nuclear industry bolt strength reduction degree detection device, comprising a main body, a cover tube 1 is arranged on the outside of the main body, a magnetic column disk 2, a control rod 3 and an exchange disk 4 are arranged from top to bottom inside the cover tube 1, and a plurality of magnetic columns 203 are arranged in an annular shape below the magnetic column disk 2; the magnetic column disk 2 is composed of an inner ring 201 and an outer ring 202, a control rod 3 is movably installed below the middle of the inner ring 201, and a plurality of spring blocks 401 are arranged on the outside of the exchange disk 4, an inclined groove 101 and a straight groove 102 are opened inside the cover tube 1, the inclined groove 101 and the straight groove 102 are alternately connected, the spring block 401 is slidably connected with the inclined groove 101 and the straight groove 102, and the end depth of the inclined groove 101 and the straight groove 102 is less than the initial end depth;

[0037] The magnetic column disk 2 and the exchange disk 4 are connected by a control rod 3. An annular rack 5 is arranged on the outer side of the magnetic column disk 2 and the exchange disk 4. A spring sleeve rod 6 is arranged between the exchange disk 4 and the annular rack 5. The length of the spring sleeve rod 6 is equal to half of the movement stroke of the control rod 3.

[0038] The exchange plate 4 is provided with bolt detection, disassembly, installation and installation hole cleaning equipment or mechanism. The control rod 3 drives the exchange plate 4 to rise and fall, so that the mechanism on the exchange plate 4 can contact the installation hole or bolt respectively. Secondly, the adjacent structures of the exchange plate 4 and the cover tube 1 cooperate with each other. The exchange plate 4 actively forms the replacement of the mechanism during the lifting and lowering, and cooperates with the magnetic column plate 2 and the magnetic column 203 to synchronously realize the recycling of waste bolts and the replenishment of core bolts, so that the automation degree of the device during use is improved;

[0039] The exchange plate 4 is provided with a detection mechanism, a removal assembly 7, a cleaning assembly 8 and a mounting assembly 9 in an annular arrangement. A maintenance liquid output structure is provided on one side of the cleaning assembly 8. The cleaning assembly 8 is used to clean the bolt mounting holes.

[0040] The cleaning assembly 8 includes a circular tube 801, a movable tube 802, a hollow sleeve 803 and a cleaning sheet 804. A cavity exists at the connection between the circular tube 801 and the movable tube 802. A connecting spring is arranged inside the cavity. The cavity is connected to the cleaning sheet 804 through the hollow sleeve 803.

[0041] There are cavities and airflow channels inside the cleaning component 8, and the cleaning sheet 804 actively adapts to the inner diameter of the mounting hole and actively cleans the inner wall of the mounting hole in cooperation with the driving rod when the cleaning component 8 is extended into the mounting hole, and the waste liquid inside the mounting hole is recovered in cooperation with the bidirectional delivery pump;

[0042] A plurality of balls are arranged at the lower end of the movable tube 802, a two-way delivery pump is arranged inside the circular tube 801, the output shaft of the water pump is connected to the movable tube 802, and a blade 11 and a spring shaft 12 are arranged at one end of the hollow sleeve 803;

[0043] There are two groups of blades 11 and spring shafts 12, and they are symmetrically arranged. The spring shaft 12 is arranged on one side of the middle part of the blade 11. The spacing between the spring shafts 12 is less than half the width of the hollow sleeve 803. After unfolding, the width of the blade 11 is less than the width of the hollow sleeve 803.

[0044] The cleaning sheet 804 is hollow and consists of a rectangular sheet 8041 and a special-shaped sheet 8042. A magnetic plate 8044 is provided at the connection between the rectangular sheet 8041 and the special-shaped sheet 8042. The vertical section of the special-shaped sheet 8042 is a parallelogram. The height of the special-shaped sheet 8042 close to the hollow sleeve 803 is higher than the height of the side close to the rectangular sheet 8041.

[0045] A plurality of protruding needles 8043 are provided on the rectangular sheet 8041, and the protruding needles 8043 are slidably connected to the rectangular sheet 8041;

[0046] Actively adjust the height of the driving rod to change the air pressure strength in the cleaning assembly 8, cooperate with the two-way delivery pump to clean the thread groove of the installation hole, and during the application of maintenance oil, cooperate with the magnetic plate 8044 to actively adjust the distance between the thread groove and the protruding needle 8043, so that the maintenance oil is applied to the thread groove and the excess maintenance oil is discharged;

[0047] An ultrasonic detection element is installed inside the detection mechanism, and the removal component 7 and the installation component 9 respectively complete the removal and installation of the bolts.

[0048] The working principle of the present invention is as follows: the detection mechanism, the removal assembly 7, the cleaning assembly 8 and the installation assembly 9 are arranged at the same distance on the exchange plate 4, and each mechanism or assembly is connected to the exchange plate 4 by a single telescopic drive rod;

[0049] Before using the detection device, the cover tube 1 needs to be installed on the bolt to be detected, and the detection mechanism is kept directly above the bolt. Due to the existence of the cover tube 1, the required bolt is located in the sealed space, and then the control rod 3 can be started to work. The control rod 3 is used to control the lifting and lowering of the exchange plate 4. The control rod 3 is extended to the maximum stroke, and then the driving rod controls the detection structure to descend to fit with the bolt. An ultrasonic detection element is arranged inside the detection structure. The ultrasonic detection element detects the bolt and feeds back the detection result to the main body, which determines whether the bolt needs to be replaced;

[0050] When the main body determines that the bolt needs to be replaced, the driving rod and the control rod 3 are synchronously recovered. Since the contact surfaces of the exchange disk 4 and the cover tube 1 are provided with an inclined groove 101, a straight groove 102 and a spring block 401, wherein the inclined groove 101 and the straight groove 102 are alternately connected, and the end depths of the inclined groove 101 and the straight groove 102 are less than the initial depths, wherein during the descent of the exchange disk 4, the spring block 401 is in the straight groove 102, so that the exchange disk 4 is driven by the control rod 3 to vertically descend. When the exchange disk 4 descends to the lowest point, the end depth of the straight groove 102 is less than the initial depth of the inclined groove 101, so that during the ascent of the exchange disk 4, the spring block 401 is transformed from being engaged with the straight groove 102 to being engaged with the inclined groove 101, thereby realizing the synchronous deflection of the exchange disk 4 during the ascent, until the exchange disk 4 rises to the highest point, the detection mechanism is changed to the removal component 7 directly above the bolt;

[0051] Since the length of the spring sleeve rod 6 is equal to half of the movement stroke of the control rod 3, and the magnetic column disk 2 is composed of an inner ring 201 and an outer ring 202, and the inner ring 201 and the outer ring 202 are rotatably connected, when the control rod 3 is recovered to half of the stroke, the annular rack 5 on the upper side of the exchange disk 4 is meshed with the annular rack 5 under the magnetic column disk 2, so that when the control rod 3 is recovered to the remaining stroke, the exchange disk 4 drives the magnetic column disk 2 to deflect synchronously, and as the distance between the exchange disk 4 and the magnetic column disk 2 is continuously reduced, the spring inside the spring sleeve rod 6 is continuously compressed, and the length of the spring sleeve rod 6 is synchronously reduced;

[0052] The exchange disk 4 descends again, and the removal component 7 takes out the bolt that needs to be replaced. The exchange disk 4 rises again, and the magnetic column disk 2 deflects synchronously. At this time, the two magnetic columns 203 below the magnetic column disk 2 correspond to the removal component 7 and the installation component 9 respectively, and the corresponding manner is on the same mid-vertical line. Among them, the magnetic column 203 corresponding to the driving removal component 7 attracts the bolt that has just been taken out, so that the bolt that has just been taken out is separated from the removal component 7. Secondly, there is a bolt that needs to be replaced below the magnetic column 203 corresponding to the installation component 9. An electromagnet is arranged inside the magnetic column 203. The magnetic column 203 above the installation component 9 is powered off, and the new bolt below the magnetic column 203 falls naturally and is connected to the installation component 9.

[0053] After the removal component 7 has finished its work, the exchange plate 4 rises and deflects, and the removal component 7 is replaced by the cleaning component 8 directly above the bolt hole. The exchange plate 4 descends next time, and the driving rod extends synchronously at the same time, and the cleaning component 8 extends into the bolt hole to clean the bolt hole.

[0054] The circular tube 801 is connected with the movable tube 802. Under the driving force of the continuous extension of the driving rod, the lower end surface of the movable tube 802 is fitted with the lower end surface of the bolt hole, and the spring between the circular tube 801 and the movable tube 802 is compressed, and the volume of the cavity is continuously reduced. Since the cavity is connected with the hollow sleeve 803 and the cleaning piece 804, the hollow sleeve 803 is extended to balance the air pressure inside the cleaning component 8 until the outer wall surface of the cleaning piece 804 contacts the inner wall of the bolt hole, and the hollow sleeve 803 stops extending. An air pressure detection element is installed inside the cavity. When the air pressure detection element detects that the air pressure inside the cleaning component 8 rises to a specified value, the driving rod stops extending.

[0055] The movable tube 802 contacts the bottom plate of the bolt hole through the ball bearings. Due to the existence of the ball bearings, there is a gap between the movable tube 802 and the bottom plate of the bolt. After the driving rod stops extending, the two-way delivery pump starts to work, and the output shaft inside the two-way delivery pump starts to work. The delivery pump extracts the impurities and solution inside the enclosed space. The two-way delivery pump drives the movable tube 802 to start rotating. The movable tube 802 is connected to the cleaning sheet 804 through the hollow sleeve 803, so that the cleaning sheet 804 can rotate synchronously with the movable tube 802 as the center.

[0056] When the airflow inside the cavity moves toward the inside of the cleaning sheet 804 as a forward flow, the airflow needs to pass through the blade 11 and the spring shaft 12 during the forward flow, wherein the blade 11 and the spring shaft 12 are structurally arranged such that the blade 11 and the spring shaft 12 cooperate to form a lever structure, and the airflow will come into contact with one side surface of the blade 11 during the forward flow, and during the forward flow, the blades 11 on both sides of the spring shaft 12 form a power arm and a resistance arm due to the airflow movement during the forward flow, wherein the length of the power arm is greater than the length of the resistance arm, so that the airflow drives the blade 11 to deflect with the spring shaft 12 as the center, until the airflow movement route is parallel to the blade 11, and after the deflection, the two blades 11 are parallel, until the air pressure inside the cleaning sheet 804 is balanced with the air pressure in the cavity, and the blade 11 is reset under the drive of the spring shaft 12;

[0057] When the airflow moves from the cleaning sheet 804 to the cavity in reverse flow, since the length of the power arm is less than the length of the resistance arm, the blade 11 is deflected in the reverse direction, wherein the spacing of the spring shaft 12 is less than the length of the two power arms, so that after the two blades 11 are deflected, the adjacent ends of the two blades 11 fit together, thereby achieving the two blades 11 hindering each other's deflection, and finally the two blades 11 form a dynamic balance. After the blades 11 form a dynamic balance, there is a gap between the end of the blade 11 away from the spring shaft 12 and the hollow sleeve 803, and the gap is used to decelerate the airflow during the reverse flow. Since the arrangement of the blades 11 and the spring shaft 12 constitutes a structure similar to a one-way valve, it is used to hinder the reverse flow and reduce the ability of the airflow in the space of the cleaning sheet 804 to move into the cavity;

[0058] The cleaning sheet 804 is structurally arranged in that a protruding needle 8043 is arranged inside the rectangular sheet 8041. Under the guidance of the rectangular sheet 8041, the protruding needle 8043 is perpendicular to the inner wall of the mounting hole, so as to facilitate cleaning the mounting hole. Secondly, during the extraction period of the two-way output pump, the structural arrangement of the special-shaped sheet 8042 is that the lower surface of the special-shaped sheet 8042 is a working surface. The special-shaped sheet 8042 guides the impurities and solution inside the mounting hole to the bottom of the movable tube 802. During the output of the maintenance oil by the two-way output pump, the upper surface of the special-shaped sheet 8042 is a working surface, so as to facilitate pushing the excess maintenance oil to the outside of the mounting hole.

[0059] A plurality of protruding needles 8043 are arranged inside the rectangular sheet 8041. When the air pressure inside the cleaning sheet 804 rises, the protruding needles 8043 are all extended under the action of the air pressure. Since the outer wall of the cleaning sheet 804 fits with the inner wall of the bolt hole, some of the protruding needles 8043 extend into the thread groove after fitting. During the operation of the two-way output pump, the cleaning sheet 804 rotates synchronously, and the protruding needles 8043 move synchronously with the cleaning sheet 804. Since there is a spiral thread groove inside the bolt hole, the protruding needles 8043 perform reciprocating horizontal motion in the process of cleaning the inner wall of the installation hole under the combined action of the outer wall structure of the thread groove and the air pressure inside the cleaning sheet 804. The protruding needles 8043 slide horizontally inside the rectangular sheet 8041 along the outer wall structure of the thread groove. During the movement of the protruding needles 8043, the impurities attached to the inner wall of the thread groove are cleaned, and at the same time, the two-way output pump recovers the impurities and solution in the installation hole.

[0060] After the installation hole is cleaned, both ends of the two-way output pump are connected with control valves and corresponding connecting pipes. When the two-way output pump changes its rotation direction, the control valve works synchronously to replace the connecting pipe. One end of the connecting pipe is connected with maintenance oil. When the two-way output pump starts to rotate in the opposite direction, the drive rod shrinks synchronously by a specified length, so that the gas pressure inside the cleaning component 8 is reduced. A magnetic plate 8044 is provided at the connection between the rectangular sheet 8041 and the special-shaped sheet 8042. The protruding needle 8043 of the magnetic plate 8044 has a suction effect. Due to the reduction of the air pressure inside the cleaning component 8, there is a difference between the attraction strength of the magnetic plate 8044 on the protruding needle 8043 and the squeezing strength of the air pressure on the protruding needle 8043, so that the protruding needle 8043 starts to move toward the inside of the rectangular sheet 8041, waiting for the attraction strength of the magnetic plate 8044 on the protruding needle 8043 and the squeezing strength of the air pressure on the protruding needle 8043 to reach a balance again, so that there is a gap between the thread grooves at the ends of the contracted protruding needle 8043.

[0061] The bidirectional output pump injects the maintenance oil into the mounting hole, wherein the output end of the maintenance oil is aligned with the rectangular sheet 8041, and the cleaning sheet 804 smears the maintenance oil on the inner wall of the mounting hole during rotation. Since the cleaning sheet 804 fits the inside of the mounting hole and there is a gap between the thread groove at the end of the protruding needle 8043, most of the maintenance oil remains in the thread groove after the maintenance oil is applied.

[0062] After the cleaning component 8 completes cleaning and applies maintenance oil, the control rod 3 drives the exchange plate 4 to rise and then fall again, and the mechanism directly above the mounting hole is replaced by the cleaning component 8 with the mounting component 9, and the mounting component 9 installs the new bolt in the mounting hole applied with maintenance oil.

[0063] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0064] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A nuclear industry bolt strength reduction detection device, comprising a main body, characterized in that: A cover cylinder (1) is arranged outside the main body, and a magnetic column disk (2), a control rod (3) and an exchange disk (4) are arranged inside the cover cylinder (1) from top to bottom, the magnetic column disk (2) and the exchange disk (4) are connected via the control rod (3), and a plurality of magnetic columns (203) are arranged in an annular shape below the magnetic column disk (2); The exchange disk (4) is provided with a detection mechanism, a removal component (7), a cleaning component (8) and a mounting component (9) in an annular arrangement. An ultrasonic detection element is installed inside the detection mechanism. The removal component (7) and the mounting component (9) respectively complete the removal and installation of the bolts. A maintenance liquid output structure is installed on one side of the cleaning component (8). The cleaning component (8) is used to clean the bolt mounting holes. The detection mechanism, the removal component, the cleaning component and the mounting component are arranged at the same distance on the exchange disk, and each mechanism or component is connected to the exchange disk by a single telescopic drive rod; The magnetic column disk (2) is composed of an inner ring (201) and an outer ring (202); a control rod (3) is movably installed at the lower middle part of the inner ring (201); a plurality of spring blocks (401) are arranged on the outer side of the exchange disk (4); an inclined groove (101) and a straight groove (102) are provided inside the cover tube (1); the end depths of the inclined groove (101) and the straight groove (102) are less than the initial end depths; the inclined groove (101) and the straight groove (102) are alternately connected; and the spring block (401) is slidably connected to the inclined groove (101) and the straight groove (102).

2. A nuclear industry bolt strength reduction detection device according to claim 1, characterized in that: An annular rack (5) is provided on the outer sides of the magnetic column disk (2) and the exchange disk (4), a spring sleeve rod (6) is provided between the exchange disk (4) and the annular rack (5), and the length of the spring sleeve rod (6) is equal to half the movement stroke of the control rod (3).

3. The nuclear industry bolt strength reduction detection device according to claim 1 is characterized by: The cleaning assembly (8) comprises a circular tube (801), a movable tube (802), a hollow sleeve (803) and a cleaning sheet (804); a cavity is present at the connection between the circular tube (801) and the movable tube (802); a connecting spring is disposed inside the cavity; and the cavity is connected to the cleaning sheet (804) via the hollow sleeve (803).

4. A nuclear industry bolt strength reduction detection device according to claim 3, characterized in that: A plurality of balls are arranged at the lower end of the movable tube (802), a bidirectional delivery pump is arranged inside the circular tube (801), and a blade (11) and a spring shaft (12) are arranged at one end inside the hollow sleeve (803).

5. A nuclear industry bolt strength reduction detection device according to claim 4, characterized in that: The blades (11) and spring shafts (12) are provided in two groups, the spring shafts (12) are provided on one side of the middle of the blades (11), the spacing between the spring shafts (12) is less than half the width of the hollow sleeve (803), and after being unfolded, the width of the blades (11) is less than the width of the hollow sleeve (803).

6. A nuclear industry bolt strength reduction detection device according to claim 5, characterized in that: The cleaning sheet (804) is hollow and is composed of a rectangular sheet (8041) and a special-shaped sheet (8042). A magnetic plate (8044) is provided at the connection between the rectangular sheet (8041) and the special-shaped sheet (8042). The vertical cross-section of the special-shaped sheet (8042) is a parallelogram. The height of the special-shaped sheet (8042) on the side close to the hollow sleeve (803) is higher than the height on the side close to the rectangular sheet (8041).

7. A nuclear industry bolt strength reduction detection device according to claim 6, characterized in that: A plurality of protruding needles (8043) are provided on the rectangular sheet (8041), and the protruding needles (8043) are slidably connected to the rectangular sheet (8041).

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