CN210119316U

CN210119316U - Online detection device based on bolt fastening structure

Info

Publication number: CN210119316U
Application number: CN201921241507.0U
Authority: CN
Inventors: 张斌; 邢成吉; 李福婧
Original assignee: Shanxi An Electronic Technology Ltd By Share Ltd
Current assignee: Shanxi An Electronic Technology Ltd By Share Ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-02-28
Anticipated expiration: 2029-08-02

Abstract

The utility model discloses an on-line detection device based on a bolt fastening structure, which comprises an on-line detection sensing device, a data acquisition device, a data transmission device and a remote service device, wherein the on-line detection sensing device is a stress detection device connected with a detected bolt; on-line measuring sensing device includes installing support, stress sensor and transition piece, the installing support includes PMKD, connecting rod and lift regulating plate, the mounting hole has been seted up on the PMKD, and fixing bolt passes the mounting hole will PMKD fixes on by the connecting piece, the connecting rod vertical welding is in PMKD is last. Has the advantages that: the stress sensor is arranged on the tested bolt, so that whether the tested bolt is loosened can be detected on line; can send detected data to remote service device to in time fasten or change the bolt being surveyed, avoid because of serious consequence and the loss of property that the bolt became invalid and cause.

Description

Online detection device based on bolt fastening structure

Technical Field

The utility model relates to a mechanical equipment safety inspection field, concretely relates to on-line measuring device based on bolt-up structure.

Background

In large or heavy mechanical equipment, such as a hydro-generator and other fixing bolts, a mounting process of pretightening force fastening is used, in long-time operation, under the long-term action of loads such as vibration, impact, fatigue, friction and the like, the state of bolt connection is often changed, phenomena such as sliding, separation and even loosening occur, the change of the connection state can damage the integrity of the structure, and the functionality and the safety of the structure are damaged.

The bolt bears the tension and compression circulation action, and under the alternating coincidence action of tension and compression, the thread is subjected to plastic deformation to cause stress relaxation, so that the pretightening force of the bolt is reduced. With the reduction of the pretightening force, the friction torque generated at the meshing part of the bolt cannot be overcome, and finally the pretightening force disappears.

The bolt can have fatigue damage and loosening phenomenon under the effect of cyclic load and forced vibration, even cause the fracture of bolt, and the inefficacy of bolt can cause catastrophic consequence and major property loss, therefore, in order to prevent the bolt not hard up, the deformation of bolt, even the fracture of bolt, it is crucial to carry out online detection to the high load bearing bolt connection of large-scale structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an on-line measuring device based on bolt-up structure just for solving above-mentioned problem can realize carrying out on-line measuring to the high load bearing bolt of large-scale structure connection to avoid serious consequence and loss of property because of the bolt inefficacy causes.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides an on-line detection device based on a bolt fastening structure, which comprises an on-line detection sensing device, a data acquisition device, a data transmission device and a remote service device, wherein the on-line detection sensing device is a stress detection device connected with a detected bolt;

the on-line detection sensing device comprises a mounting bracket, a stress sensor and a transition piece, wherein the mounting bracket comprises a fixed base plate, a connecting rod and a lifting adjusting plate, the fixed base plate is provided with a mounting hole, a fixing bolt penetrates through the mounting hole to fix the fixed base plate on a connected piece, the connecting rod is vertically welded on the fixed base plate, one end of the lifting adjusting plate is slidably mounted on the connecting rod, the upper side and the lower side of the lifting adjusting plate are respectively provided with a limiting ring capable of limiting the height of the lifting adjusting plate, the other end of the lifting adjusting plate extends to the upper side of a tested bolt, a vertically downward suspension component is mounted on the lifting adjusting plate, the stress sensor is fixedly mounted at the bottom of the suspension component, the transition piece is positioned between the tested bolt and the stress sensor, and the bottom of the transition piece is placed at the top of the, the top of the transition piece is attached to the bottom of the stress sensor but is not stressed;

the stress sensor is in cable connection with the data acquisition device, and detection data of the stress sensor is transmitted to the data transmission device through the data acquisition device and is transmitted to the remote service device through the data transmission device.

Adopt above-mentioned one kind based on-line measuring device of bolt-up structure, when being surveyed the bolt and producing when becoming flexible, can arousing the displacement change of being surveyed the bolt, because transition compresses tightly on the nut of being surveyed the bolt, and the not hard up of being surveyed the bolt can produce a orientation the pressure of transition direction, this pressure passes through transition transmission gives stress sensor, stress sensor receives behind the pressure, and output value can change, and output value quilt after data acquisition device gathers, through data transmission device sends for remote service device.

Preferably, the mounting hole is a kidney-shaped hole.

Preferably, the connecting rod is a screw rod, and the limiting ring is a hexagon nut matched with the screw rod.

Preferably, the suspension assembly includes suspension bolt, adjusting nut and connecting plate, suspension bolt is vertical to run through the lifting adjusting plate, suspension bolt is last to install and is used for fixing to it adjusting nut, just adjusting nut is located lifting adjusting plate's bottom, the connecting plate passes through the screw thread and installs suspension bolt's lower extreme, just it is right to install on suspension bolt be used for the locking nut that the connecting plate carries out locking, stress sensor passes through bolt fixed mounting in the bottom of connecting plate.

Preferably, the transition piece comprises a gland, a positioning groove for positioning the stress sensor is formed in the center of the top of the gland, a stepped clamping groove is formed in the bottom of the gland, and the inner diameter of the stepped clamping groove is gradually reduced from the bottom of the gland to the upper part;

transition still including lengthening the cover, lengthen the cylinder metal casing that the cover runs through from top to bottom, just it has multiple specification, every kind of specification to lengthen the external diameter of cover and correspond respectively the external diameter of one of them grade of cell body of notch cuttype draw-in groove.

Has the advantages that: 1. the utility model can detect whether the tested bolt is loose on line by arranging the stress sensor on the tested bolt;

2. can send detected data to remote service device to in time fasten or change the bolt being surveyed, avoid because of serious consequence and the loss of property that the bolt became invalid and cause.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the installation structure of the on-line detection sensing device of the present invention;

FIG. 2 is a view of a transition piece structure of the present invention;

FIG. 3 is a flow chart of the present invention;

FIG. 4 is a block diagram of the data acquisition device of the present invention;

fig. 5 is a block diagram of the data transmission device of the present invention.

The reference numerals are explained below:

1. fixing the bolt; 1a, mounting holes; 2. mounting a bracket; 2a, fixing a bottom plate; 2b, a connecting rod; 2c, a limiting ring; 2d, lifting an adjusting plate; 3. a suspension assembly; 3a, a suspension bolt; 3b, adjusting nuts; 3c, locking the nut; 3d, connecting plates; 4. a stress sensor; 5. a transition piece; 5a, a gland; 5a1, positioning groove; 5a2, a step-type card slot; 5b, lengthening the sleeve; 6. a tested bolt; 7. a connected member; 8. detecting a sensing device on line; 9. a data acquisition device; 10. a data transmission device; 11. and a remote service device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-5, the utility model provides an on-line measuring device based on bolt-up structure, including on-line measuring sensing device 8, data acquisition device 9, data transmission device 10 and teleservice device 11, on-line measuring sensing device 8 is the stress detection device who is connected with bolt 6 under test;

the on-line detection sensing device 8 comprises a mounting bracket 2, a stress sensor 4 and a transition piece 5, the mounting bracket 2 comprises a fixed base plate 2a, a connecting rod 2b and a lifting adjusting plate 2d, the fixed base plate 2a is provided with a mounting hole 1a, a fixing bolt 1 penetrates through the mounting hole 1a to fix the fixed base plate 2a on a connected piece 7, the connecting rod 2b is vertically welded on the fixed base plate 2a, one end of the lifting adjusting plate 2d is slidably mounted on the connecting rod 2b, the upper side and the lower side of the lifting adjusting plate 2d are respectively provided with a limiting ring 2c capable of limiting the height of the lifting adjusting plate, the other end of the lifting adjusting plate 2d extends to the upper part of a tested bolt 6, the lifting adjusting plate 2d is provided with a vertically downward suspension component 3, the stress sensor 4 is fixedly mounted at the bottom of the suspension component 3, the transition piece 5 is positioned between the tested bolt 6 and the stress sensor 4, the bottom of the transition piece 5 is placed at the top of the tested bolt 6, and the top of the transition piece 5 is attached to the bottom of the stress sensor 4 but is not stressed;

the stress sensor 4 is in cable connection with the data acquisition device 9, and the detection data of the stress sensor 4 is transmitted to the data transmission device 10 through the data acquisition device 9 and is transmitted to the remote service device 11 through the data transmission device 10;

the data acquisition device 9 is an acquisition substation and mainly comprises a single chip microcomputer, a multi-path stress sensor 4 (at most 8 paths), a data acquisition conditioning circuit, a power management circuit, a wireless module (433 MHZ frequency band), a memory, a display screen, a man-machine interaction circuit (key) and the like; the stress sensor is mainly responsible for transmitting stress data acquired by the stress sensor 4 to the data transmission device 10 through the wireless module at regular time, storing the stress data locally and displaying the acquired stress data on a local display screen in real time;

the data transmission device 10 is a transmission substation and mainly comprises a singlechip, a power management circuit, a 433MHZ wireless transceiver module, a 4G module, a memory, a display screen, a man-machine interaction interface (key), and the like; the transmission substation is a coordinator of a star network, receives an instruction of an upper computer, sends the instruction to the acquisition substation, is responsible for collecting acquisition data of the acquisition substation in the network through a 433MHZ frequency band wireless transceiver module, and transmits the acquisition data to the upper computer through a ground 4G network, is a transfer station of information, and has the functions of alarming indication, inquiring real-time data of the acquisition substation, storing missing data and intelligently judging faults of the acquisition substations;

the remote service device 11 is an upper computer, and an alarm threshold value can be set through the upper computer, so that when the detection value of the stress sensor 4 reaches the alarm threshold value, the upper computer can send out an alarm signal, and a maintainer can be arranged to overhaul the bolt at the alarm position in time.

Preferably, the mounting hole 1a is a kidney-shaped hole, so that the position of the mounting bracket 2 can be slightly adjusted when the fixing bolt 1 is mounted on the connected piece 7 and the fixing bolt 1 is not locked, so that the stress sensor 4 corresponds to the lower transition piece 5.

Connecting rod 2b is the screw rod, spacing ring 2c be with this screw rod assorted hexagon nut, so set up, be convenient for make spacing ring 2c can reciprocate along connecting rod 2b to make things convenient for the altitude mixture control and the fixed of lift regulating plate 2 d.

Suspension assembly 3 includes suspension bolt 3a, adjusting nut 3b and connecting plate 3d, suspension bolt 3a is vertical to run through lifting adjusting plate 2d, it is used for fixing to it to install on suspension bolt 3a adjusting nut 3b, just adjusting nut 3b is located lifting adjusting plate 2 d's bottom, connecting plate 3d passes through the screw thread and installs suspension bolt 3 a's lower extreme, just it is right to install on suspension bolt 3a be used for connecting plate 3d carries out the lock nut 3c of locking, stress sensor 4 passes through bolt fixed mounting in connecting plate 3 d's bottom.

Transition piece 5 includes gland 5a, gland 5a top center offer be used for right the positioning groove 5a1 that stress sensor 4 advances line location, gland 5a bottom processing has notch 5a2, notch 5a2 by gland 5a bottom to the top internal diameter successive layer reduces, so set up, be convenient for make gland 5a can be applicable to the bolt of multiple specification simultaneously, when gland 5a installs, make the nut card at 6 tops of bolt under test in certain level notch 5a2 rather than diameter assorted, and make stress sensor 4 below stretch into positioning groove 5a1 in to make stress sensor 4, gland 5a and the axis of bolt under test 6 be located a straight line, and then improve the accuracy of data detection;

transition piece 5 is still including lengthening cover 5b, lengthening cover 5b is the cylinder metal casing that runs through from top to bottom, just lengthening cover 5b has multiple specification, every specification lengthening cover 5 b's external diameter corresponds respectively the external diameter of notch-type draw-in groove 5a 2's one of them one-level cell body, so set up, be convenient for at the vertical upwards passed by connecting piece 7 of bolt 6 under test, and when being surveyed 6 upper ends bolt and being locked by connecting piece 7 through the nut, the accessible will lengthen cover 5b and overlap the screw rod part at being surveyed bolt 6, and make lengthening cover 5b bottom top on being surveyed the nut, cup joint gland 5a again in lengthening cover 5b upper end, wherein surveyed bolt 6 stretches into the length that lengthens in the cover 5b and is not higher than lengthening cover 5 b's height, so can be when being surveyed the nut and become flexible, the displacement that produces transmits for gland 5a through lengthening cover 5b, and is transmitted to the stress sensor 4 by the gland 5a, thereby realizing the online detection of the fastening connection of the nut.

Adopt above-mentioned structure, when being surveyed bolt 6 and producing when becoming flexible, can arousing the displacement change of being surveyed bolt 6, because transition 5 compresses tightly on being surveyed bolt 6's nut, and being surveyed bolt 6's not flexible can produce a orientation transition 5 direction's pressure, this pressure passes through transition 5 transmits for stress sensor 4, stress sensor 4 receives behind the pressure, and output value can change, output value quilt data acquisition device 9 gathers the back, through data transmission device 10 sends for remote service device 11.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides an online detection device based on bolt-up structure which characterized in that: the on-line detection device is a stress detection device connected with a bolt to be detected;

2. The on-line detection device based on the bolt fastening structure is characterized in that: the mounting hole is a waist-shaped hole.

3. The on-line detection device based on the bolt fastening structure is characterized in that: the connecting rod is a screw rod, and the limiting ring is a hexagon nut matched with the screw rod.

4. The on-line detection device based on the bolt fastening structure is characterized in that: the suspension assembly includes suspension bolt, adjusting nut and connecting plate, suspension bolt is vertical to be run through the lifting adjusting plate, it is used for fixing to it to install on the suspension bolt adjusting nut, just adjusting nut is located the bottom of lifting adjusting plate, the connecting plate passes through the screw thread and installs suspension bolt's lower extreme, just it is right to install on the suspension bolt be used for the connecting plate carries out the lock nut who locks, stress transducer passes through bolt fixed mounting in the bottom of connecting plate.

5. The on-line detection device based on the bolt fastening structure is characterized in that: the transition piece comprises a gland, a positioning groove for positioning the stress sensor is formed in the center of the top of the gland, a stepped clamping groove is formed in the bottom of the gland, and the inner diameter of the stepped clamping groove is gradually reduced from the bottom of the gland to the upper part;