CN219178888U

CN219178888U - Bolt looseness on-line monitoring device

Info

Publication number: CN219178888U
Application number: CN202320164720.6U
Authority: CN
Inventors: 杨明超; 汪传民; 唐玺添; 苏宇航; 高伟; 李谦; 刘德阳; 朱历平; 刘镜彪
Original assignee: Guangdong Inspection and Research Institute of Special Equipment Zhuhai Inspection Institute
Current assignee: Guangdong Inspection and Research Institute of Special Equipment Zhuhai Inspection Institute
Priority date: 2023-02-08
Filing date: 2023-02-08
Publication date: 2023-06-13
Anticipated expiration: 2033-02-08

Abstract

The utility model discloses an on-line bolt looseness monitoring device, which comprises a first sensing unit, a second sensing unit and a nut sleeve, wherein the first sensing unit comprises a first end cover and a second end cover, the first end cover comprises a first cover plate and a first protruding part, the second end cover comprises a second cover plate and a second protruding part, and an induction piece is arranged on the first protruding part; the second sensing unit comprises a sensing assembly and a shell, the second cover plate is rotationally connected with the shell, a first accommodating space is formed by the second cover plate and the shell, and the sensing assembly is arranged in the first accommodating space; the nut sleeve is sleeved on the shell and is used for setting a nut to be tested. In the utility model, when the bolt to be tested and the nut to be tested rotate relatively, the sensing piece and the angle conversion device rotate relatively, the relative rotation of the nut and the stud is converted into an electric signal, the analog quantity is converted into the digital quantity through the sensing component, and then the digital quantity is sent to the staff.

Description

Bolt looseness on-line monitoring device

Technical Field

The utility model relates to the field of special equipment detection, in particular to an on-line bolt loosening monitoring device.

Background

The tower crane can generate alternating load on the high-strength bolt in the working process, and the high-strength bolt of the tower crane is easy to loosen due to vibration caused by external environment. Once the loosened bolt cannot be found in time, a shearing force is generated on the bolt along with the further use of the tower crane, so that the bolt is broken and broken, and accidents are easily caused.

At present, aiming at loosening of a high-strength bolt of a tower crane, the two nuts of the bolt are usually found through regular manual overhaul or scribing by using a scribing method, the two methods are time-consuming and labor-consuming, the discovery of the loosened bolt is relatively delayed, the loosened bolt cannot be pre-tightened in time, and potential safety hazards exist.

Disclosure of Invention

In order to solve at least one of the technical problems, the utility model provides an on-line bolt loosening monitoring device, which adopts the following technical scheme:

the utility model provides a bolt looseness online monitoring device which comprises a first sensing unit, a second sensing unit and a nut sleeve, wherein the first sensing unit comprises a first end cover and a second end cover, the first end cover comprises a first cover plate and a first protruding part, the first protruding part is arranged in the middle of the first cover plate, the second end cover comprises a second cover plate and a second protruding part, the second protruding part is arranged in the middle of the second cover plate, the second protruding part is hollow, the first protruding part is inserted into the second protruding part, an induction piece is arranged on the first protruding part, a connecting hole is formed in the middle of the second protruding part, and the induction piece penetrates through the connecting hole; the second sensing unit comprises a sensing assembly and a shell, wherein the shell is hollow, the second cover plate is positioned in the shell and is rotationally connected with the shell, a first accommodating space is formed by the second cover plate and the shell, the sensing assembly is arranged in the first accommodating space, an angle conversion device is arranged on the sensing assembly, and the sensing piece is connected with the angle conversion device; the nut sleeve is sleeved on the shell, the relative position between the nut sleeve and the shell is stable, and the nut sleeve is used for setting a nut to be tested.

The embodiment of the utility model has at least the following beneficial effects: according to the utility model, the bolt to be tested and the first end cover are relatively static, so that the relative position between the sensing piece and the bolt to be tested is stable, the nut to be tested and the nut sleeve are relatively static, the nut sleeve and the shell are relatively static, so that the relative position between the second sensing unit and the nut to be tested is stable, when the bolt to be tested and the nut to be tested rotate relatively, the sensing piece rotates relatively with the angle conversion device, the relative rotation of the nut and the stud is converted into an electric signal, the sensing component converts the analog quantity into the digital quantity, and then the digital quantity is sent to a worker, and the worker can timely and effectively find the loosening bolt, so that the on-line monitoring of the loosening of the bolt is realized, and the safety accident caused by the loosening of the tower crane bolt is avoided.

In some embodiments of the present utility model, the first sensing unit further includes a magnetic component, an end surface of the bolt to be tested can be abutted against the first cover plate, the magnetic component is used for attracting an end of the bolt to be tested, and a double faced adhesive tape is disposed between the first cover plate and the end surface of the bolt to be tested.

In some embodiments of the present utility model, the nut sleeve includes a first straight portion, an inclined portion, and a second straight portion, where an inner wall of the first straight portion is provided with a prism shape, the first straight portion is used to be sleeved on the nut to be tested so that the nut sleeve rotates along with the nut to be tested, the inclined portion is located between the first straight portion and the second straight portion, the first straight portion forms an angle with the inclined portion, the second straight portion forms an angle with the inclined portion, an inner wall of the second straight portion includes a gap portion and a mating portion, a first step is provided at a connection position of the gap portion and the mating portion, a gap is provided between the gap portion and the first sensing unit, and the mating portion is sleeved on an outer wall of the housing.

In some embodiments of the present utility model, the mating portion is provided in a prismatic shape, and the shape of the outer wall of the housing corresponds to the shape of the mating portion, so that the housing rotates together with the nut sleeve.

In some embodiments of the present utility model, a second step is disposed on an inner wall of the housing, and the second cover plate abuts against an end surface of the second step.

In some embodiments of the present utility model, the outer wall of the first protrusion is provided in a prismatic shape, and the inner wall of the second protrusion corresponds to the outer wall of the first protrusion in shape, so that the relative positions of the first end cover and the second end cover are stable.

In some embodiments of the present utility model, a second accommodating space is formed between the first cover plate and the second cover plate, a sealing cover is disposed in the second accommodating space, the sealing cover includes a first extending portion, a bending portion, and a second extending portion, the bending portion is located between the first extending portion and the second extending portion, the first extending portion extends toward the first cover plate, the second extending portion extends toward the second protruding portion, an end portion of the housing extends into the second accommodating space, and the end portion of the housing is connected with the bending portion through glue curing.

In some embodiments of the utility model, an end of the first boss is provided with an abutment member that abuts the first end of the sensing piece.

In some embodiments of the present utility model, the sensing component is fixed in the housing through a pouring sealant, the sensing component includes an analog conversion board, a main control board, and a bluetooth communication board, the angle conversion device is disposed on the analog conversion board, and the analog conversion board is electrically connected with the main control board.

In some embodiments of the present utility model, the angle conversion device is provided with a groove, and the second end of the sensing piece is disposed in the groove.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of an on-line bolt looseness monitoring device;

FIG. 2 is a cross-sectional view of the bolt looseness on-line monitoring device of the utility model;

FIG. 3 is a schematic view of the structure of a first end cap in the bolt looseness on-line monitoring device of the utility model;

FIG. 4 is a schematic view of the structure of a second end cap in the bolt looseness on-line monitoring device of the utility model;

FIG. 5 is a schematic structural view of a seal cover in the bolt looseness on-line monitoring device of the utility model;

FIG. 6 is a schematic view of the structure of the housing in the bolt looseness on-line monitoring device of the utility model;

FIG. 7 is a schematic view of the structure of a nut housing in the bolt looseness on-line monitoring device of the utility model;

fig. 8 is a cross-sectional view of a nut housing in the bolt looseness on-line monitoring device of the utility model.

Reference numerals:

101. a first end cap; 102. a second end cap; 103. a first cover plate; 104. a first boss; 105. a second cover plate; 106. a second protruding portion; 107. an induction piece;

201. a housing; 202. a second step; 203. sealing cover; 204. a first extension; 205. a bending part; 206. a second extension; 207. an analog quantity conversion board;

301. a nut sleeve; 302. a first straight portion; 303. an inclined portion; 304. a second straight portion; 305. a first step.

Detailed Description

This section will describe in detail embodiments of the present utility model with reference to fig. 1 to 8, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that, if the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are used as directions or positional relationships based on the directions shown in the drawings, the directions are merely for convenience of description and for simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Features defining "first", "second" are used to distinguish feature names from special meanings, and furthermore, features defining "first", "second" may explicitly or implicitly include one or more such features. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 2, an embodiment of the present utility model provides an on-line bolt loosening monitoring device, which includes a first sensing unit, a second sensing unit, and a nut sleeve 301.

The first sensing unit and the bolt to be tested are kept relatively static, so that the first sensing unit and the bolt to be tested are prevented from rotating relatively; the second sensing unit and the nut to be detected are kept relatively static, relative rotation between the second sensing unit and the nut to be detected is avoided, when the bolt to be detected and the nut to be detected are rotated relatively, the first sensing unit and the second sensing unit are rotated relatively, and the loosening condition of the bolt is monitored by measuring, calculating and quantifying the relative rotation between the first sensing unit and the second sensing unit.

The first sensing unit includes a first end cover 101 and a second end cover 102, where the relative positions of the first end cover 101 and the second end cover 102 are stable, so that the first end cover 101 and the second end cover 102 are prevented from generating relative rotation. As shown in fig. 3, the first end cover 101 includes a first cover plate 103 and a first protruding portion 104, where the first protruding portion 104 is disposed in the middle of the first cover plate 103, so that the first sensing unit is convenient to rotate, the first cover plate 103 is circular, and the first protruding portion 104 is disposed at the center of the first cover plate 103.

As shown in fig. 4, the second end cover 102 includes a second cover 105 and a second protruding portion 106, where the second protruding portion 106 is disposed in the middle of the second cover 105, in order to facilitate the rotation of the first sensing unit, the second cover 105 is also configured in a circular shape, and the second protruding portion 106 is disposed at the center of the second cover 105. Further, the first end cover 101 and the second end cover 102 are connected with the second protruding portion 106 through the first protruding portion 104, the second protruding portion 106 is hollow, and the first protruding portion 104 can be inserted into the second protruding portion 106 to complete connection, so that the first end cover 101 and the second end cover 102 are tightly connected, shaking is avoided, and the shape of the outer wall of the first protruding portion 104 is approximately the same as the shape of the inner wall of the second protruding portion 106.

To facilitate axial positioning between the first end cap 101 and the second end cap 102, a third step is provided on a sidewall of the first boss 104, and an outer diameter of the first boss 104 in a range from the third step to the first cover plate 103 is approximately the same as an outer diameter of the second boss 106. It will be appreciated that the extreme position of the second boss 106 is such that the second boss 106 abuts the stepped surface of the third step, thereby defining an axial relative position between the first end cap 101 and the second end cap 102.

Be provided with sensing piece 107 on the first bellying 104, sensing piece 107 is in the tip of first bellying 104, and the middle part of second bellying 106 is provided with the connecting hole, and sensing piece 107 passes the connecting hole to be connected to on the second sensing unit, and first sensing unit passes through sensing piece 107 transmission bolt and the relative rotation trend of nut that awaits measuring with the second sensing unit.

In some examples, to ensure that the bolt to be tested is always in a connected state with the first sensing unit, the first sensing unit further includes a magnetic component that attracts an end of the bolt to be tested, so that the end of the bolt to be tested always remains in abutment with the first cover plate 103. Under the condition that the bolt to be tested is abutted against the first cover plate 103, relative rotation still possibly occurs between the bolt to be tested and the first cover plate 103, so that double faced adhesive tape is arranged between the first cover plate 103 and the bolt to be tested, relative rotation between the bolt to be tested and the first cover plate 103 is avoided, and further the rotation trend of the bolt to be tested is transmitted to the first sensing unit.

In some examples, the bolt under test transmits the rotational trend to the first end cap 101, and the first end cap 101 needs to further transmit the rotational trend of the bolt under test to the sensing piece 107 through the second end cap 102, so that it is necessary to ensure stable position between the first end cap 101 and the second end cap 102, i.e. to avoid relative rotation between the first end cap 101 and the second end cap 102. The outer wall of the first boss 104 is provided in a prismatic shape, and the inner wall of the second boss 106 is also provided in a corresponding prismatic shape, and the prism edge of the outer wall of the first boss 104 is caught in the prism groove of the inner wall of the second boss 106, thereby transmitting the rotational force from the first boss 104 to the second boss 106. Since the shape of the connecting hole corresponds to the shape of the sensing piece 107, the sensing piece 107 and the second end cover 102 are prevented from rotating relatively, and the rotation trend can be transmitted to the sensing piece 107.

In some examples, the end of the first protruding portion 104 is provided with an abutment member, and the abutment member abuts against the first end of the sensing piece 107, so that the sensing piece 107 is pushed into the second sensing unit, and for the heights of different second sensing units, the height of the sensing piece 107 can be changed on the premise that the abutment member compresses and ensures connection, that is, the sensing piece 107 can dynamically adapt to the heights of different second sensing units, and the connection effectiveness of the sensing piece 107 and the second sensing unit is ensured.

In some examples, the sensing piece 107 is connected to an angle conversion device in the second sensing unit, the angle conversion device is provided with a groove, and the second end of the sensing piece 107 is inserted into the groove. The loosening degree of the bolt to be measured is monitored by measuring the rotation angle of the sensing piece 107 relative to the angle converter.

The second sensing unit comprises a sensing assembly, a housing 201, the housing 201 for accommodating the sensing assembly.

As shown in fig. 6, the housing 201 is hollow, the second cover plate 105 is located in the housing 201, the second cover plate 105 is rotationally connected with the housing 201, and when the bolt to be tested and the nut to be tested rotate relatively, the second cover plate 105 rotates in the housing 201. The second cover plate 105 and the housing 201 enclose a first accommodating space, the sensing assembly is disposed in the first accommodating space, and the angle conversion device is disposed on the sensing assembly. The shell 201 and the sensing assembly form a whole, under the condition that a tower crane bolt is loosened, the relative rotation of the nut to be tested and the bolt to be tested is converted into an electric signal on the sensing assembly, the electric signal is further converted into a digital value from an analog value, and then the digital value is sent to a worker to form monitoring of bolt loosening.

In some examples, the inner wall of the housing 201 is provided with a second step 202, and the second cover plate 105 abuts against an end surface of the second step 202, so as to define an axial position of the second end cover 102, thereby ensuring that the first sensing unit and the second sensing unit are firmly connected.

In some examples, a second accommodation space is formed between the first cover plate 103 and the second cover plate 105. As shown in fig. 5, a sealing cover 203 is disposed in the second accommodating space, where the sealing cover 203 ensures that the first sensing unit and the second sensing unit are independent of each other, and the sealing cover 203 further ensures that the first sensing unit and the second sensing unit are stably connected.

The sealing cover 203 includes a first extending portion 204, a bending portion 205, and a second extending portion 206, the bending portion 205 is located between the first extending portion 204 and the second extending portion 206, the first extending portion 204 extends toward the direction of the first cover plate 103, so as to ensure that the axial position of the sealing cover 203 in the second accommodating space is stable, and prevent the sealing cover 203 from shaking in the second accommodating space, and the second extending portion 206 extends toward the direction of the second protruding portion 106. The bending portion 205 is fixedly connected with the opening end of the housing 201, it can be understood that the opening end of the housing 201 extends into the second accommodating space, and is connected with the bending portion 205 through glue curing, and the sealing cover 203 is clamped in the second accommodating space through the second extending portion 206, so that the position of the housing 201 is further stable.

Specifically, the opening end of the housing 201 is provided with a first inclined plane, the bending portion 205 is provided with a second inclined plane, the first inclined plane is abutted against the second inclined plane, the contact area between the bending portion 205 and the opening end of the housing 201 is enlarged, and connection stability is ensured.

In some examples, the sensing assembly is fixed in the housing 201 by a potting compound, so that the sensing assembly and the housing 201 rotate synchronously, thereby ensuring the monitoring precision, and simultaneously improving the structural strength of the second sensing unit. The sensing component comprises an analog quantity conversion plate 207, a main control board and a Bluetooth communication board, wherein an angle conversion device is arranged on the analog quantity conversion plate 207, the analog quantity conversion plate 207 is electrically connected with the main control board through a flat cable, smooth signal transmission is guaranteed, and the Bluetooth communication board wirelessly transmits monitored data of a bolt to be detected and a nut to be detected to a worker.

As shown in fig. 7, in some examples, a nut sleeve 301 is sleeved on the housing 201, and the nut to be tested is positioned in the nut sleeve 301, so that the relative position of the nut to be tested and the nut sleeve 301 is ensured to be stable, and the nut to be tested and the nut sleeve 301 are prevented from rotating relatively. It can be understood that the relative position between the nut sleeve 301 and the housing 201 is also kept stable, so that the nut sleeve 301 and the housing 201 are prevented from rotating relatively, and the rotation trend of the nut to be tested is transferred to the housing 201, that is, to the second sensing unit, so that the same movement trend as that of the bolt to be tested and the nut to be tested is generated between the sensing piece 107 and the angle conversion device.

As shown in fig. 8, in some examples, the nut sleeve 301 includes a first straight portion 302, an inclined portion 303, and a second straight portion 304, where an inner wall of the first straight portion 302 is configured as a prism shape, so as to be conveniently sleeved on the nut to be tested, and prevent the nut to be tested from rotating relative to the nut sleeve 301. The inclined portion 303 is located between the first straight portion 302 and the second straight portion 304, and the diameter of the first straight portion 302 is larger than that of the second straight portion 304 due to the larger size of the nut to be measured, and the inclined portion 303 serves as a transition portion between the first straight portion 302 and the second straight portion 304. It will be appreciated that the inclined portion 303 is angled with respect to the first straight portion 302 and that the inclined portion 303 is angled with respect to the second straight portion 304.

The inner wall of the second straight portion 304 includes a gap portion and a mating portion, a first step 305 is disposed at a connection portion between the gap portion and the mating portion, that is, an inner diameter of the gap portion is larger than an inner diameter of the mating portion, the gap portion surrounds the first sensing unit, a gap is disposed between the gap portion and the first sensing unit, friction is avoided to affect measurement accuracy of relative rotation, and the mating portion abuts against an outer wall of the housing 201.

In some examples, the mating portion is prismatic, and correspondingly, the outer wall of the housing 201 is prismatic, and edges of the outer wall of the housing 201 are snapped into prismatic grooves of the mating portion, so as to avoid relative rotation between the housing 201 and the nut sleeve 301.

In the description of the present specification, if a description appears that makes reference to the term "one embodiment," "some examples," "some embodiments," "an exemplary embodiment," "an example," "a particular example," or "some examples," etc., it is intended that the particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. Bolt looseness on-line monitoring device, characterized by, include:

the first sensing unit comprises a first end cover and a second end cover, wherein the first end cover comprises a first cover plate and a first protruding part, the first protruding part is arranged in the middle of the first cover plate, the second end cover comprises a second cover plate and a second protruding part, the second protruding part is arranged in the middle of the second cover plate, the second protruding part is hollow, the first protruding part is inserted into the second protruding part, an induction piece is arranged on the first protruding part, a connecting hole is formed in the middle of the second protruding part, and the induction piece penetrates through the connecting hole;

the second sensing unit comprises a sensing assembly and a shell, wherein the shell is hollow, the second cover plate is positioned in the shell and is rotationally connected with the shell, a first accommodating space is formed by the second cover plate and the shell in an enclosing mode, the sensing assembly is arranged in the first accommodating space, an angle conversion device is arranged on the sensing assembly, and the sensing piece is connected with the angle conversion device;

the nut sleeve is sleeved on the shell, the relative position between the nut sleeve and the shell is stable, and the nut sleeve is used for setting a nut to be tested.

2. The on-line monitoring device for bolt looseness according to claim 1, wherein the first sensing unit further comprises a magnetic component, an end face of the bolt to be detected can be abutted against the first cover plate, the magnetic component is used for attracting an end portion of the bolt to be detected, and a double faced adhesive tape is arranged between the first cover plate and the end face of the bolt to be detected.

3. The on-line monitoring device for bolt looseness according to claim 1, wherein the nut sleeve comprises a first straight portion, an inclined portion and a second straight portion, the inner wall of the first straight portion is in a prismatic shape, the first straight portion is used for being sleeved on a nut to be tested so that the nut sleeve rotates along with the nut to be tested, the inclined portion is located between the first straight portion and the second straight portion, the first straight portion is angled with the inclined portion, the second straight portion is angled with the inclined portion, the inner wall of the second straight portion comprises a gap portion and a matching portion, a first step is arranged at the joint of the gap portion and the matching portion, a gap is arranged between the gap portion and the first sensing unit, and the matching portion is sleeved with the outer wall of the shell.

4. The on-line monitoring device for bolt looseness according to claim 3, wherein the fitting portion is provided in a prismatic shape, and the shape of the outer wall of the housing corresponds to the shape of the fitting portion so that the housing rotates together with the nut housing.

5. The on-line monitoring device for bolt looseness according to claim 1, wherein the inner wall of the housing is provided with a second step, and the second cover plate abuts against the end face of the second step.

6. The on-line monitoring device for bolt looseness according to claim 1, wherein the outer wall of the first boss is provided in a prismatic shape, and the inner wall of the second boss is shaped corresponding to the outer wall of the first boss so as to stabilize the relative positions of the first end cover and the second end cover.

7. The on-line monitoring device for bolt looseness according to claim 5, wherein a second accommodating space is formed between the first cover plate and the second cover plate, a sealing cover is arranged in the second accommodating space, the sealing cover comprises a first extending part, a bending part and a second extending part, the bending part is positioned between the first extending part and the second extending part, the first extending part extends towards the direction of the first cover plate, the second extending part extends towards the direction of the second protruding part, the end part of the shell extends into the second accommodating space, and the end part of the shell is connected with the bending part through glue solidification.

8. The on-line monitoring device for bolt looseness according to claim 1, wherein an end of the first boss is provided with an abutment member that abuts against the first end of the sensing piece.

9. The on-line monitoring device for bolt looseness according to claim 1, wherein the sensing assembly is fixed in the shell through pouring sealant, the sensing assembly comprises an analog quantity conversion plate, a main control board and a Bluetooth communication board, the angle conversion device is arranged on the analog quantity conversion plate, and the analog quantity conversion plate is electrically connected with the main control board.

10. The on-line bolt looseness monitoring device of claim 9, wherein the angle conversion device is provided with a groove, and the second end of the sensing piece is arranged in the groove.