Steel wire rope flaw detector

Abstract

The utility model relates to the technical field of steel wire rope detection, and provides a steel wire rope flaw detector which comprises a machine shell, a rope sleeve, a fixing assembly and a detection assembly, the rope sleeve comprises a hoop plate and an end plate, and the end plate is fixedly arranged on the hoop plate and abuts against one side of the machine shell; the fixing assembly comprises a rotating rod and an abutting rod, one end of the rotating rod is rotationally arranged on the machine shell, and the abutting rod is fixedly arranged at the other end of the rotating rod; the abutting rod abuts against the side, away from the machine shell, of the end plate and can move in the axial direction of the rotating rod. The end plate is arranged on the hoop plate, and the rotating rod and the abutting rod are arranged on the shell, so that the rope sleeve can be replaced, the flaw detector is suitable for steel wire ropes with different diameters, the end part of the rope sleeve can be abutted and fixed, the displacement of the rope sleeve in the use process is avoided, and the safety of the flaw detector is improved. And the detection precision of the flaw detector is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of wire rope detection, in particular to a wire rope flaw detector. Background Art

[0002] A wire rope flaw detector is an instrument for detecting defects such as broken wires and wear of wire ropes, and is widely used in fields such as elevator maintenance. The wire rope flaw detector usually adopts magnetic detection technology. After the wire rope is saturated magnetized, the magnetic field signal of the wire rope is collected by a leakage magnetic sensor, and whether there are defects in the wire rope is judged according to the magnetic field signal.

[0003] The utility model with the patent publication number CN207020124U discloses a sensor-separable wire rope non-destructive detector, which includes a ranging wheel and a detector housing. The detector housing is composed of two half-housings. The half-housing is composed of a rear outer baffle, an outer housing body, and a front outer baffle. The outer housing body is in a semi-circular arch shape, and the rear outer baffle and the front outer baffle are in a semi-circular ring shape. The rear outer baffle and the front outer baffle are respectively vertically arranged on two sides of the outer housing body to form the half-housing; the two half-housings are relatively buckled to form the housing of the detector; a pair of semi-circular ring-shaped permanent magnets with opposite polarities are embedded on both sides of the outer housing body, and a signal processing circuit board, a connector, a sensor, and a bushing are arranged in the middle of the outer housing body. In the utility model, the sensor and the bushing adopt a separable design, and only one detection magnetic head is used. By replacing sensors and bushings of different specifications, the detection of wire ropes with different diameters is adapted, the detection accuracy and sensitivity are greatly improved, and the cost is reduced.

[0004] In the above technical solution, in order to fix the bushing, a fixing member for holding the side of the bushing is provided, and annular protrusions for respectively holding the front and rear outer baffles are provided at both ends of the bushing. However, affected by factors such as processing errors, gaps will appear between the annular protrusions and the front and rear outer baffles, resulting in axial movement of the bushing during use and affecting the detection accuracy of the detector. Content of the Utility Model

[0005] In view of this, the utility model provides a wire rope flaw detector, which improves the fixing firmness of the bushing on the premise of facilitating the replacement of the bushing.

[0006] The technical solution of the utility model is realized as follows: The utility model provides a wire rope flaw detector, which includes a housing, a rope sleeve, a fixing component, and a detection component. Among them,

[0007] The rope sleeve includes a hoop plate and an end plate. The end plate is fixedly arranged on the hoop plate and abuts against one side of the housing;

[0008] The fixing component includes a rotating rod and a resisting rod. One end of the rotating rod is rotatably arranged on the casing, and the other end is fixedly provided with the resisting rod; the resisting rod abuts against the side of the end plate away from the casing and can move along the axial direction of the rotating rod;

[0009] The detection component is arranged in the casing and is used for magnetizing the steel wire rope and collecting and transmitting the magnetic field signal in the steel wire rope;

[0010] There are two casings, the rope sleeves, the fixing components and the detection components, and they correspond one by one. The two casings are detachably and fixedly connected, and the two hoop plates enclose a circular tubular structure.

[0011] Based on the above technical solutions, preferably, the rotating rod includes a rotating block and an adjusting rod, wherein,

[0012] The rotating block is rotatably arranged on the casing;

[0013] One end of the adjusting rod is connected to the rotating block by thread fit, and the other end is fixedly connected to the resisting rod.

[0014] More preferably, a clamping groove is formed on the side of the end plate away from the casing, and the resisting rod is clamped with the clamping groove.

[0015] More preferably, the clamping groove is of a conical structure, and the inner diameter of the end away from the casing is larger than the inner diameter of the end close to the casing;

[0016] The resisting rod is of a conical structure, and the outer diameter of the end close to the casing is smaller than the outer diameter of the end away from the casing.

[0017] Based on the above technical solutions, preferably, the fixing component further includes a positioning rod. A sliding groove is formed on the end plate. The positioning rod is fixedly arranged on the casing and is clamped with the sliding groove.

[0018] More preferably, the positioning rod and the rotating rod are arranged relatively with respect to the center line of the end plate.

[0019] Based on the above technical solutions, preferably, the detection component includes a C-shaped magnet, a sensor, a circuit component and a socket connector, wherein,

[0020] The C-shaped magnet and the circuit component are fixedly arranged in the casing;

[0021] The sensor is fixedly arranged on the hoop plate and is electrically connected to the circuit component through the socket connector.

[0022] More preferably, the sensor includes a housing, an intermediate plate, a Hall element, and two fixing plates, wherein,

[0023] The housing is fixedly arranged on the hoop plate and fixedly connected to one end of the socket connector;

[0024] The intermediate plate is fixedly arranged inside the housing, and an installation groove is formed inside it;

[0025] The Hall element is fixedly arranged in the installation groove and electrically connected to the socket connector;

[0026] The two fixing plates are respectively fixedly arranged on both sides of the intermediate plate and are respectively abutted against both sides of the Hall element.

[0027] More preferably, two installation grooves are arranged on each intermediate plate, the two installation grooves are symmetrically arranged about the center line of the intermediate plate, and one Hall element is arranged in each installation groove.

[0028] Based on the above technical solutions, preferably, a ranging mechanism is further included. The ranging mechanism includes a fixing frame, a coding wheel, and an elastic member, wherein,

[0029] The fixing frame is rotatably arranged on one of the casings;

[0030] The coding wheel is rotatably arranged on the fixing frame and electrically connected to an encoder;

[0031] The elastic member is abutted and arranged between the side of the fixing frame away from the rope sleeve and the casing. The wire rope flaw detector of the present utility model has the following beneficial effects compared with the prior art:

[0032] (1) By arranging an end plate on the hoop plate and arranging a rotating rod and a supporting rod on the casing, and using their mutual cooperation, not only can the rope sleeve be replaced, so that the flaw detector is adapted to wire ropes of different diameters, but also the end of the rope sleeve can be supported and fixed to prevent it from displacing during use, ensuring the detection accuracy of the flaw detector;

[0033] (2) By arranging the sensor on the rope sleeve, the sensor and the rope sleeve can be replaced synchronously. By arranging a socket connector, the sensor and the circuit component can be quickly disassembled and assembled, thereby improving the disassembly and assembly convenience of the rope sleeve and the sensor;

[0034] (3) By arranging the elastic member, the coding wheel can always abut against the wire rope, thereby improving the adaptability of the ranging mechanism. Description of the Drawings

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0036] Figure 1 It is a three-dimensional view of the wire rope flaw detector of the present invention;

[0037] Figure 2 It is a front view of the fixing component of the wire rope flaw detector of the present invention;

[0038] Figure 3 It is a three-dimensional view of the rotating rod of the wire rope flaw detector of the present invention;

[0039] Figure 4 It is a sectional view of the housing of the wire rope flaw detector of the present invention;

[0040] Figure 5 It is an exploded view of the sensor of the wire rope flaw detector of the present invention;

[0041] Figure 6 It is a three-dimensional view of the ranging mechanism of the wire rope flaw detector of the present invention.

[0042] Wherein: 1. Housing; 2. Rope sleeve; 21. Hoop plate; 22. End plate; 201. Card slot; 202. Slide groove; 3. Fixing component; 31. Rotating rod; 311. Rotating block; 312. Adjusting rod; 32. Supporting rod; 33. Positioning rod; 4. Detection component; 41. C-shaped magnet; 42. Sensor; 421. Outer shell; 422. Intermediate plate; 423. Hall element; 424. Fixing plate; 43. Circuit component; 44. Plug-in connector; 401. Installation groove; 5. Ranging mechanism; 51. Fixed bracket; 52. Coding wheel; 53. Elastic member. Detailed implementation manners

[0043] The following will clearly and completely describe the technical solutions in the present invention in combination with the specific implementation manners of the present invention. Obviously, the described implementation manners are only some implementation manners of the present invention, rather than all implementation manners. Based on the implementation manners in the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0044] As Figure 1-6 shown, the wire rope flaw detector of the present invention includes a housing 1, a rope sleeve 2, a fixing component 3, a detection component 4, and a ranging mechanism 5.

[0045] Among them, the housing 1 is used to carry other components. There are two housings 1, and the two housings 1 are detachably and fixedly connected. Specifically, one side of the two can be hinged, and the other side can be fixed and separated in the form of a buckle.

[0046] The rope sleeve 2 is used to be sleeved outside the steel wire rope to be detected. The rope sleeve 2 includes a hoop plate 21 and an end plate 22. The hoop plate 21 penetrates through the housing 1. The end plate 22 is fixedly arranged on the hoop plate 21 and abuts against one side of the housing 1; there are two rope sleeves 2, which are fixedly connected to the housing 1 one by one. When the two housings 1 are fixedly connected, the two hoop plates 21 enclose a circular tubular structure, so as to be sleeved outside the steel wire rope.

[0047] The fixing component 3 is used to fix the rope sleeve 2 and the housing 1. The fixing component 3 includes a rotating rod 31 and a resisting rod 32. One end of the rotating rod 31 is rotatably arranged on the housing 1, and the other end is fixedly provided with the resisting rod 32; the resisting rod 32 abuts against the side of the end plate 22 away from the housing 1. As Figure 2 shown, both sides of the end plate 22 abut against the housing 1 and the resisting rod 32 respectively. Therefore, the end plate 22 can be clamped and fixed, avoiding the axial displacement and lateral displacement of the rope sleeve 2 during use, and ensuring the detection accuracy of this flaw detector; the resisting rod 32 can move along the axial direction of the rotating rod 31. When detecting steel wire ropes of different specifications, it is necessary to replace the rope sleeve 2 with the corresponding specification. At this time, let the resisting rod 32 move away from the end plate 22 along the axial direction of the rotating rod 31, and rotate the rotating rod 31 so that it also moves away from the end plate 22, then the rope sleeve 2 can be separated from the housing 1 to quickly replace the rope sleeve 2; of course, there are also two fixing components 3, which are used to fix the two rope sleeves 2 respectively.

[0048] The rotating rod 31 includes a rotating block 311 and an adjusting rod 312. As Figure 3 shown, the rotating block 311 is rotatably arranged on the housing 1; one end of the adjusting rod 312 is connected to the rotating block 311 by thread fit, and the other end is fixedly connected to the resisting rod 32. When the adjusting rod 312 is rotated, by using the thread fit between the adjusting rod 312 and the rotating block 311, the resisting rod 32 can be driven to move along the axial direction of the adjusting rod 312.

[0049] As Figure 3 shown, in order to improve the fixing firmness between the resisting rod 32 and the end plate 22, a clamping groove 201 is opened on the side of the end plate 22 away from the housing 1. When the resisting rod 32 abuts against the end plate 22, it is clamped with the clamping groove 201; specifically, the clamping groove 201 is a conical structure, and the inner diameter of its end away from the housing 1 is larger than the inner diameter of its end close to the housing 1; the resisting rod 32 is a conical structure, and the outer diameter of its end close to the housing 1 is smaller than the outer diameter of its end away from the housing 1, so as to use the cooperation of the two to prevent the resisting rod 32 from disengaging from the clamping groove 201 when being fixed to the end plate 22.

[0050] As Figure 2 shown, the rope sleeve 2 further includes a positioning rod 33. A chute 202 is formed on the end plate 22. The positioning rod 33 is fixedly arranged on the machine housing 1 and is engaged with the chute 202, so as to abut against the side part of the end plate 22, thereby strengthening the fixing firmness between the rope sleeve 2 and the machine housing 1. Specifically, preferably, the chute 202 is arranged in an L shape, so that the positioning rod 33 can abut against three sides in the chute 202.

[0051] To ensure the fixing stability of the rope sleeve 2, as Figure 2 shown, preferably, the positioning rod 33 and the rotating rod 31 are arranged relatively with respect to the center line of the end plate 22.

[0052] The detection assembly 4 is used for magnetizing the steel wire rope and collecting and transmitting the magnetic field signal in the steel wire rope. The detection assembly 4 is arranged in the machine housing 1, and there are also two of them, which are respectively arranged in each machine housing 1.

[0053] The detection assembly 4 includes a C-shaped magnet 41, a sensor 42, a circuit assembly 43 and a socket connector 44. Among them, the C-shaped magnet 41 is used for magnetizing the steel wire rope, and the circuit assembly 43 is used for realizing the transfer of electric energy and signals. Both of them are prior arts. The C-shaped magnet 41 and the circuit assembly 43 are fixedly arranged in the machine housing 1. The sensor 42 is used for collecting the magnetic field signal in the steel wire rope, and the sensor 42 is fixedly arranged on the hoop plate 21. When detecting steel wire ropes of different specifications, it is necessary to replace the rope sleeve 2 and the sensor 42 together. The sensor 42 is electrically connected to the circuit assembly 43 through the socket connector 44. The socket connector 44 is composed of a male end and a female end that can be inserted and pulled out of each other. Therefore, the sensor 42 can be quickly disassembled and assembled by inserting and pulling out the socket connector 44.

[0054] The C-shaped magnet 41 can also be arranged to be composed of a magnetic bridge in the middle and magnets at both ends. One N end of a magnet in the C-shaped magnet 41 is attached to the rope sleeve 2, and the S end of the other magnet is attached to the rope sleeve 2. A closed magnetic field is formed around the steel wire rope by the connection of the magnetic bridge.

[0055] The sensor 42 includes a housing 421, an intermediate plate 422, a Hall element 423 and two fixing plates 424. Among them, the housing 421 is fixedly arranged on the hoop plate 21 and is fixedly connected to one end (female end or male end) of the socket connector 44. The intermediate plate 422 is fixedly arranged in the housing 421, and an installation groove 401 is formed inside it. The Hall element 423 is fixedly arranged in the installation groove 401 and is electrically connected to the socket connector 44. The two fixing plates 424 are respectively fixedly arranged on both sides of the intermediate plate 422 and are respectively abutted against both sides of the Hall element 423, as Figure 5As shown, after the Hall element 423 is placed in the installation groove 401 and limited, two fixing plates 424 are installed on both sides of the middle plate 422 to clamp and fix the Hall element 423.

[0056] The middle plate 422 and the fixing plate 424 are preferably slidably connected by a dovetail groove. After the middle plate 422, the fixing plate 424, and the Hall element 423 are assembled, they are preferably fixed in the housing 421 by injecting glue; the housing 421 is preferably made of aluminum, which will not affect the reception of the magnetic induction lines of the steel wire rope. The fixing plate 424 is made of iron, which allows the magnetic induction lines to vertically pass through the Hall element 423. The middle plate 422 is made of copper, and its cooperation with the fixing plate 424 plays a role in concentrating the magnetic field, which can gather the magnetic field at the steel wire rope, not only expanding the coverage range of a single Hall element 423, effectively reducing the number of Hall elements 423, but also increasing the detection sensitivity of this flaw detector, reducing the missed detection rate, and effectively improving the reliability of steel wire rope detection.

[0057] Two installation grooves 401 are provided on each middle plate 422. The two installation grooves 401 are symmetrically arranged about the center line of the middle plate 422, and one Hall element 423 is provided in each installation groove 401. Specifically, it is preferably that the included angle between the connection line of the position where the Hall element 423 is located and the center line of the rope sleeve 2 and the center line of the middle plate 422 is 45 degrees. There are a total of four Hall elements 423 in the two detection assemblies 4, and the four Hall elements 423 are circumferentially arrayed around the center line of the rope sleeve 2, so as to receive the magnetic induction lines of the steel wire rope in all directions and improve the detection accuracy of the magnetic field signal of this flaw detector. Of course, this is one of the implementation manners, and the Hall elements 423 can also be circumferentially arrayed around the center line of the rope sleeve 2 in multiple numbers.

[0058] The principle of the detection assembly 4 is as follows: First, the C-shaped magnet 41 saturates the magnetization of the steel wire rope, and then the sensor 42 collects the magnetic induction intensity information inside the steel wire rope. After signal processing, this magnetic induction intensity information is transmitted to the observation device through the socket connector 44 and the circuit assembly 43 and displayed in the form of a magnetic flux leakage image. If there are defects in the steel wire rope, abnormal fluctuations will appear in this magnetic flux leakage image, so it is determined whether there are defects in the steel wire rope by whether there are abnormal fluctuations in this magnetic flux leakage image.

[0059] The ranging mechanism 5 is used to detect the position of this flaw detector on the steel wire rope. The ranging mechanism 5 includes a fixed frame 51, a coding wheel 52, and an elastic member 53. Among them, the fixed frame 51 is rotatably arranged on one of the casings 1; the coding wheel 52 is rotatably arranged on the fixed frame 51; the elastic member 53 is abutted and arranged between the side of the fixed frame 51 away from the rope sleeve 2 and the casing 1; thus, the elastic member 53 makes the coding wheel 52 can abut against steel wire ropes with different diameters; specifically, the elastic member 53 is preferably a torsion spring.

[0060] The coding wheel 52 is electrically connected to the encoder. Its ranging principle is a prior art. The number of turns of the coding wheel 52 can be converted by the encoder into the distance that the coding wheel 52 travels on the steel wire rope, so as to determine the moving distance of the flaw detector from the initial position of the steel wire rope, that is, to determine the position of the flaw detector on the steel wire rope.

[0061] The usage method of the steel wire rope flaw detector of the present utility model is as follows:

[0062] First, replace the rope sleeve 2 and the sensor 42 with corresponding specifications according to the diameter of the steel wire rope to be measured. Then fix the two casings 1 and make the steel wire rope located between the two hoop plates 21. Finally, move the casing 1 and use the detection component 4 to detect the defects of the steel wire rope.

[0063] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Wire rope flaw detector, characterized by: It comprises a housing (1), a rope loop (2), a fixing component (3) and a detection component (4), wherein: The rope loop (2) comprises a hoop plate (21) and an end plate (22), wherein the end plate (22) is fixedly arranged on the hoop plate (21) and abuts against one side of the casing (1); The fixing assembly (3) comprises a rotating rod (31) and a supporting rod (32); one end of the rotating rod (31) is rotatably arranged on the housing (1), and the other end is fixedly provided with the supporting rod (32); the supporting rod (32) is in contact with a side of the end plate (22) away from the housing (1), and is movable along the axial direction of the rotating rod (31); The detection component (4) is arranged in the housing (1) and is used to magnetize the steel wire rope and collect and transmit the magnetic field signal in the steel wire rope; The housing (1), the rope loop (2), the fixing assembly (3) and the detection assembly (4) are each provided with two and correspond to each other. The two housings (1) are detachably fixedly connected, and the two hoop plates (21) enclose a circular tubular structure.

2. The wire rope flaw detector according to claim 1, characterized in that: The rotating rod (31) comprises a rotating block (311) and an adjusting rod (312), wherein: The rotating block (311) is rotatably arranged on the housing (1); One end of the adjusting rod (312) is connected to the rotating block (311) through threaded engagement, and the other end is fixedly connected to the supporting rod (32).

3. The wire rope flaw detector according to claim 2, characterized in that: A slot (201) is provided on a side of the end plate (22) away from the housing (1), and the supporting rod (32) is engaged with the slot (201).

4. The wire rope flaw detector according to claim 3, characterized in that: The slot (201) is a conical structure, and the inner diameter of the end away from the housing (1) is larger than the inner diameter of the end close to the housing (1); The supporting rod (32) is a conical structure, and the outer diameter of the end close to the housing (1) is smaller than the outer diameter of the end away from the housing (1).

5. The wire rope flaw detector according to claim 1, characterized in that: The fixing assembly (3) further comprises a positioning rod (33), a slide groove (202) is provided on the end plate (22), and the positioning rod (33) is fixedly arranged on the housing (1) and is engaged with the slide groove (202).

6. The wire rope flaw detector according to claim 5, characterized in that: The positioning rod (33) and the rotating rod (31) are arranged relative to each other with respect to the center line of the end plate (22).

7. The wire rope flaw detector according to claim 1, characterized in that: The detection assembly (4) comprises a C-shaped magnet (41), a sensor (42), a circuit assembly (43) and a socket-type connector (44), wherein: The C-shaped magnet (41) and the circuit assembly (43) are fixedly arranged in the housing (1); The sensor (42) is fixedly arranged on the hoop plate (21) and is electrically connected to the circuit assembly (43) via the socket connector (44).

8. The wire rope flaw detector according to claim 7, characterized in that: The sensor (42) comprises a housing (421), an intermediate plate (422), a Hall element (423) and two fixing plates (424), wherein: The housing (421) is fixedly arranged on the hoop plate (21) and is fixedly connected to one end of the socket connector (44); The intermediate plate (422) is fixedly arranged in the outer shell (421), and a mounting groove (401) is provided inside the intermediate plate; The Hall element (423) is fixedly disposed in the mounting groove (401) and is electrically connected to the socket connector (44); The two fixing plates (424) are respectively fixedly arranged on two sides of the middle plate (422), and are respectively in contact with two sides of the Hall element (423).

9. The wire rope flaw detector according to claim 8, characterized in that: Two mounting grooves (401) are arranged on each of the intermediate plates (422), the two mounting grooves (401) are symmetrically arranged about the center line of the intermediate plate (422), and one of the Hall elements (423) is arranged in each of the mounting grooves (401).

10. The wire rope flaw detector according to claim 1, characterized in that: It also includes a distance measuring mechanism (5), the distance measuring mechanism (5) including a fixing frame (51), a coding wheel (52) and an elastic member (53), wherein the fixing frame (51) is rotatably arranged on one of the housings (1); The encoding wheel (52) is rotatably mounted on the fixing frame (51) and is electrically connected to the encoder; The elastic member (53) is disposed between a side of the fixing frame (51) away from the rope loop (2) and the housing (1).

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