CN117804749B - Micro-vibration monitoring system for bolts - Google Patents

Abstract

The invention discloses a micro vibration monitoring system of a bolt, in particular to the technical field of mechanical fastener monitoring, which comprises two to-be-connected pieces, wherein a connecting bolt is movably inserted between the two to-be-connected pieces, the bottom of the connecting bolt penetrates through the two to-be-connected pieces and is provided with a connecting nut in a threaded manner, a monitoring mechanism is arranged between the head of the connecting bolt and the upper surface of the to-be-connected piece, and a sealing component is arranged between the outer side of the monitoring mechanism and the upper surface of the to-be-connected piece.

Description

Bolt Micro-Vibration Monitoring System

Technical Field

The invention relates to the technical field of mechanical fastener monitoring, in particular to a tiny vibration monitoring system for bolts.

Background technique

Various machines and parts use bolts and nuts in assembly, connection and fastening, which greatly facilitates the assembly and use of machinery, buildings, bridges, etc. However, if the fixed objects have periodic vibration, such as motors, train tracks, fan blades, etc., the bolts will loosen. If not prevented, the equipment may vibrate abnormally or parts may be damaged, or the entire equipment may be paralyzed. For bolt fastening devices that vibrate for a long time, the risk of loosening increases, and they often loosen themselves during severe vibrations, causing damage to parts and even major accidents and casualties. In order to avoid dangerous accidents caused by loosening due to bolt vibration, manual inspections are required regularly to check the connection bolts regularly. Manual inspections are not only inefficient, but also costly and carry risks of personal safety. It is also difficult to ensure the accuracy and reliability of the inspection results. Therefore, it is necessary to monitor bolt loosening in real time online.

At present, there are usually three methods for online monitoring of bolt loosening: Ultrasonic method: install an ultrasonic sensor on the top of the bolt, calculate the bolt elongation according to the ultrasonic time and speed, and calculate the axial force of the bolt according to the axial stiffness of the bolt; Strain gauge monitoring method: put a special stress sensor on the bolt like a gasket, and the pressure of the sensor is the axial force of the bolt; Video image method: use camera technology to monitor whether the nut of the bolt connection pair rotates, if it rotates, the bolt is loose; The first two methods require monitoring the preload force of each bolt, and each bolt needs to be processed, which is complex and costly; The video image method takes into account the monitoring range of a single camera, usually requires the installation of at least two high-precision cameras, and has high requirements for the installation environment and high cost. For this reason, we propose a bolt micro-vibration monitoring system to solve the above problems.

Summary of the invention

The object of the present invention is to provide a tiny vibration monitoring system for bolts to solve the problems raised in the above background technology.

To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a micro-vibration monitoring system for bolts, comprising a part to be connected, wherein two parts to be connected are provided, a connecting bolt is movably inserted between the two parts to be connected, the bottom of the connecting bolt passes through the two parts to be connected and a connecting nut is threadedly installed, a monitoring mechanism is provided between the head of the connecting bolt and the upper surface of the part to be connected, and a sealing assembly is provided between the outer side of the monitoring mechanism and the upper surface of the part to be connected.

Preferably, the monitoring mechanism includes a monitoring outer cylinder and a positioning sleeve, the middle parts of the monitoring outer cylinder and the positioning sleeve are both provided with through grooves, the connecting bolt movably passes through the two through grooves, a monitoring cavity is provided in the monitoring outer cylinder, a force transmission tube is fixedly installed in the middle part of the bottom end of the positioning sleeve, an annular through groove for use with the force transmission tube is provided in the middle part of the top end of the monitoring outer cylinder, the bottom of the force transmission tube passes through the annular through groove and extends into the monitoring cavity, a pressure ring is fixedly installed at the bottom end of the force transmission tube, an arc plate is integrally formed on the outer side of the pressure ring, the outer side of the arc plate contacts the inner wall of the monitoring cavity, a torque monitoring component corresponding to the arc plate is provided on one side of the inner lower wall of the monitoring cavity, and a tension monitoring component corresponding to the pressure ring is fixedly installed on the side of the inner lower wall of the monitoring cavity close to the torque monitoring component.

Preferably, the head of the connecting bolt is movably engaged in the positioning sleeve, the bottom end of the monitoring outer cylinder is fixedly mounted with two symmetrically distributed fixing protrusions, the upper surface of the part to be connected is provided with a fixing groove used in conjunction with the fixing protrusion, and the fixing protrusion is movably engaged in the corresponding fixing groove.

Preferably, the torque monitoring assembly includes a fixing frame and a side pressure plate, the fixing frame is fixedly mounted on one side of the inner lower wall of the monitoring cavity, the side pressure plates are provided with two symmetrically distributed, the two side pressure plates are respectively vertically mounted on the two ends of the arc plate, and a signal receiver corresponding to the position of the side pressure plate is fixedly mounted on the top of the fixing frame.

Preferably, the tension monitoring component includes a monitoring outer frame, which is fixedly mounted on the inner lower wall of the monitoring cavity near the side of the torque monitoring component, a longitudinal sliding groove is opened in the middle of the top of the monitoring outer frame, a limiting ring is fixedly provided on the top of the longitudinal sliding groove, a tension outer cylinder is movably inserted in the middle of the limiting ring, a pressure rod is slidably provided on the bottom end of the tension outer cylinder, an electric contact is fixedly mounted on the bottom end of the pressure rod, a contact receiver used in conjunction with the electric contact is fixedly mounted on the inner lower wall of the longitudinal sliding groove, the electric contact is in contact with the contact receiver, and the upper surface of the tension outer cylinder is in contact with the lower surface of the pressure ring.

Preferably, a ring is fixedly provided at the bottom of the longitudinal slide groove, the tension outer tube movably passes through the middle part of the ring, a tension ring is fixedly provided on the middle part of the outer side of the tension outer tube, a first tension spring is provided between the bottom end of the tension ring and the top end of the ring, and a second tension spring is fixedly installed between the top end of the pressure rod and the inner upper wall of the tension outer tube.

Preferably, the sealing assembly includes a sealing outer cylinder, a sealing tube is integrally formed at the middle of the top end of the sealing outer cylinder, the sealing outer cylinder is movably sleeved on the outside of the monitoring outer cylinder, the sealing tube is movably sleeved on the outside of the force transmission tube, a telescopic groove is provided at the bottom end of the sealing outer cylinder, a sealing insert is slidably clamped at the bottom of the telescopic groove, a third tension spring is fixedly installed at the top end of the sealing insert and the inner upper wall of the telescopic groove, a sealing ring is fixedly installed at the bottom end of the sealing insert, the lower surface of the sealing ring contacts the upper surface of the part to be connected, the lower surface of the positioning sleeve is provided with a concave ring groove used in conjunction with the sealing tube, and the top of the sealing tube is movably clamped in the concave ring groove.

Preferably, a reset pointer is fixedly mounted on the outer wall of the positioning sleeve, and a reset groove for use with the reset pointer is formed on the upper surface of the monitoring outer cylinder.

Preferably, a transparent window is fixedly provided on the top end of the sealing outer cylinder, and the position of the transparent window corresponds vertically to the position of the reset groove.

Preferably, the micro-vibration monitoring system of the bolt includes a torque monitoring module, a tension monitoring module and a sealing module, the torque monitoring module includes a torque monitoring component, the tension monitoring module includes a tension monitoring component, and the torque monitoring component and the tension monitoring component are used in conjunction with each other.

Compared with the prior art, the present invention has the following beneficial effects:

1. By setting up a monitoring mechanism, which includes a torque monitoring component and a tension monitoring component used in conjunction with each other, real-time monitoring of the torsion of the connecting bolts caused by tiny vibrations and real-time monitoring of the increase in the distance between the connecting nut and the connecting bolt when the connecting nut is torsion caused by tiny vibrations can be performed simultaneously, thereby effectively improving the monitoring effect of tiny vibrations of the bolts and improving the safety of the fixation between the connecting nut and the connecting bolt;

2. By setting up the sealing assembly, when the positioning sleeve and the force transmission tube rotate stably, the bottom end of the positioning sleeve, the outside of the monitoring outer tube and the upper surface of the part to be connected can still be effectively sealed. At the same time, when the spacing between the connecting bolts and the connecting nuts increases, the spacing between the positioning sleeve and the monitoring outer tube increases, and the bottom end of the positioning sleeve, the outside of the monitoring outer tube and the upper surface of the part to be connected can still be effectively sealed;

3. By setting the reset pointer and opening the reset groove, during subsequent maintenance, it is only necessary to observe the correspondence between the reset groove and the reset pointer through the transparent window when tightening the connecting bolts and nuts, so as to realize the reset of the relative position between the positioning sleeve and the monitoring outer cylinder, which is convenient for subsequent real-time detection.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of the structure of the present invention,

FIG2 is a schematic diagram of the structural connection after the present invention is split.

FIG3 is a schematic diagram of the structure of the monitoring mechanism in the present invention,

FIG4 is a schematic diagram of the partial structural connection of the torque monitoring assembly in the present invention,

FIG5 is a schematic diagram of the structural connection of the tension monitoring assembly in the present invention,

FIG6 is a schematic diagram of the partial structural connection of the tension monitoring assembly in the present invention,

FIG. 7 is a schematic diagram of the structural connection of the sealing assembly in the present invention,

FIG8 is a schematic diagram of the structural connection of the monitoring mechanism and the sealing assembly in the present invention,

FIG. 9 is a diagram of a micro-vibration monitoring system for bolts in the present invention.

In the figure: 1, the part to be connected; 101, the fixing groove; 2, the connecting bolt; 3, the connecting nut; 4, the monitoring mechanism; 5, the sealing assembly; 41, the monitoring outer tube; 411, the monitoring cavity; 412, the annular groove; 42, the positioning sleeve; 43, the force transmission tube; 44, the pressure ring; 45, the arc plate; 46, the torque monitoring assembly; 47, the tension monitoring assembly; 48, the reset pointer; 481, the reset groove; 49, the fixing convex; 461, the fixing frame; 462, the signal receiver; 463, Side pressure plate; 471, monitoring outer frame; 4711, longitudinal slide groove; 472, limit ring; 473, tension outer cylinder; 474, pressure rod; 475, electrical contact; 4751, contact receiver; 476, sleeve ring; 477, tension ring; 478, first tension spring; 479, second tension spring; 51, sealing outer cylinder; 52, sealing tube; 511, telescopic groove; 53, sealing insert; 54, third tension spring; 55, sealing ring; 521, concave ring groove; 56, transparent window.

Detailed ways

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.

Embodiment: As shown in Figures 1-9, the present invention provides a micro-vibration monitoring system for bolts, including a part to be connected 1, wherein two parts 1 to be connected are provided, a connecting bolt 2 is movably inserted between the two parts 1 to be connected, the bottom of the connecting bolt 2 passes through the two parts to be connected 1 and is threadedly installed with a connecting nut 3 to perform bolt fixation between the two parts to be connected, a monitoring mechanism 4 is provided between the head of the connecting bolt 2 and the upper surface of the part 1 to be connected, and a sealing assembly 5 is provided between the outer side of the monitoring mechanism 4 and the upper surface of the part 1 to be connected.

The monitoring mechanism 4 includes a monitoring outer cylinder 41 and a positioning sleeve 42. The middle of the monitoring outer cylinder 41 and the positioning sleeve 42 are both provided with through slots, and the connecting bolt 2 movably passes through the two through slots.

The head of the connecting bolt 2 is movably engaged in the positioning sleeve 42 to perform a positioning sleeve connection between the monitoring mechanism 4 and the head of the connecting bolt 2. The bottom end of the monitoring outer cylinder 41 is fixedly installed with two symmetrically distributed fixing protrusions 49. The upper surface of the part to be connected 1 is provided with a fixing groove 101 used in conjunction with the fixing protrusion 49. The fixing protrusion 49 is movably engaged in the corresponding fixing groove 101 to perform a positioning sleeve connection between the monitoring mechanism 4 and the upper surface of the part to be connected 1.

The monitoring outer tube 41 is provided with a monitoring cavity 411, a force transmission tube 43 is fixedly installed in the middle of the bottom end of the positioning sleeve 42, and an annular groove 412 used in conjunction with the force transmission tube 43 is opened in the middle of the top end of the monitoring outer tube 41. The bottom of the force transmission tube 43 passes through the annular groove 412 and extends into the monitoring cavity 411, which is convenient for the positioning sleeve 42 and the force transmission tube 43 to rotate stably. When the connecting bolt 2 generates a small vibration and twists, the positioning sleeve 42 and the force transmission tube 43 are driven to rotate stably. A pressure ring 44 is fixedly installed at the bottom end, and an arc plate 45 is integrally formed on the outer side of the pressure ring 44. The outer side of the arc plate 45 contacts the inner wall of the monitoring cavity 411, and the positioning sleeve 42 and the force transmission tube 43 rotate stably to drive the pressure ring 44 and the arc plate 45 to rotate stably. A torque monitoring component 46 corresponding to the arc plate 45 is provided on one side of the inner lower wall of the monitoring cavity 411, and a tension monitoring component 47 corresponding to the pressure ring 44 is fixedly installed on one side of the inner lower wall of the monitoring cavity 411 close to the torque monitoring component 46.

The torque monitoring assembly 46 includes a fixing frame 461 and a side pressure plate 463. The fixing frame 461 is fixedly installed on one side of the inner lower wall of the monitoring cavity 411. The side pressure plates 463 are provided with two symmetrically distributed ones. The two side pressure plates 463 are respectively vertically installed at the two ends of the arc plate 45. The top of the fixing frame 461 is fixedly installed with a signal receiver 462 corresponding to the position of the side pressure plate 463. The arc plate 45 rotates stably to drive the side pressure plate 463 to rotate. When rotating a certain safe distance, the side pressure plate 463 will contact the corresponding signal receiver 462. The signal receiver 462 transmits an electrical signal to the monitoring terminal to remind the connection bolt 2 at this location that a small vibration has been generated for twisting, so as to facilitate subsequent maintenance personnel to perform precise maintenance on it, thereby realizing real-time monitoring of the small vibration of the bolt and improving safety in use.

The tension monitoring assembly 47 includes a monitoring outer frame 471, which is fixedly mounted on the inner lower wall of the monitoring cavity 411 near the side of the torque monitoring assembly 46. A longitudinal slide groove 4711 is provided in the middle of the top of the monitoring outer frame 471. A limit ring 472 is fixedly clamped on the top of the longitudinal slide groove 4711. A tension outer cylinder 473 is movably inserted in the middle of the limit ring 472. The upper surface of the tension outer cylinder 473 is in contact with the lower surface of the pressure ring 44. After the two parts 1 to be connected are bolted together by the connecting bolts 2 and the connecting nuts 3, the pressure ring 44 always presses against the tension outer cylinder 473 to limit the height of the tension outer cylinder 473.

The bottom end sliding card of the tension outer cylinder 473 is provided with a pressure rod 474, and the bottom end of the pressure rod 474 is fixedly installed with an electric contact 475, and the inner lower wall of the longitudinal slide groove 4711 is fixedly installed with a contact receiver 4751 used in conjunction with the electric contact 475. The electric contact 475 is in contact with the contact receiver 4751. After the two parts 1 to be connected are bolted by connecting bolts 2 and connecting nuts 3, the electric contact 475 is always in contact with the contact receiver 4751, and the contact receiver 4751 always receives the tension signal, indicating that the distance between the connecting bolts 2 and the connecting nuts 3 has not changed significantly.

A collar 476 is fixedly provided at the bottom of the longitudinal slide groove 4711, and the tension outer cylinder 473 movably passes through the middle part of the collar 476. A tension ring 477 is fixedly provided at the middle part of the outer side of the tension outer cylinder 473. A first tension spring 478 is provided between the bottom end of the tension ring 477 and the top end of the collar 476, and a second tension spring 479 is fixedly installed between the top end of the pressure rod 474 and the inner upper wall of the tension outer cylinder 473. After the two parts 1 to be connected are bolted together by the connecting bolts 2 and the connecting nuts 3, the first tension spring 478 and the second tension spring 479 are always in a compressed state. When the connecting nut 3 generates a slight vibration and twists, the distance between the connecting nut 3 and the connecting bolt 2 increases, and the tension effect of the first tension spring 478 is cooperated to drive the tension ring 477 and the tension outer cylinder 473 to move upward. 4751 will not receive the tension signal, and the monitoring terminal will detect that the connecting nut 3 has generated a small vibration for twisting, which is convenient for subsequent maintenance personnel to perform precise maintenance on it, thereby realizing real-time monitoring of the small vibration of the bolts and improving the safety of use.

The sealing assembly 5 comprises a sealing outer cylinder 51, a sealing tube 52 is integrally formed at the middle of the top end of the sealing outer cylinder 51, the sealing outer cylinder 51 is movably sleeved on the outside of the monitoring outer cylinder 41, the sealing tube 52 is movably sleeved on the outside of the force transmission tube 43, a telescopic groove 511 is provided at the bottom end of the sealing outer cylinder 51, a sealing insert 53 is slidably clamped at the bottom of the telescopic groove 511, and the sealing insert 53 can be telescopic in the telescopic groove 511, a third tension spring 54 is fixedly installed at the top end of the sealing insert 53 and the inner upper wall of the telescopic groove 511, a sealing ring 55 is fixedly installed at the bottom end of the sealing insert 53, the lower surface of the sealing ring 55 contacts the upper surface of the to-be-connected member 1, a concave ring groove 521 is provided on the lower surface of the positioning sleeve 42 for use with the sealing tube 52, and the top of the sealing tube 52 is movably clamped in the concave ring groove 521, By opening a concave annular groove 521, and using a sealing outer cylinder 51, a sealing tube 52 and a sealing ring 55 in combination, an effective seal is performed between the bottom end of the positioning sleeve 42, the outside of the monitoring outer cylinder 41 and the upper surface of the part 1 to be connected. When the positioning sleeve 42 and the force transmission tube 43 rotate stably, an effective seal can still be performed between the bottom end of the positioning sleeve 42, the outside of the monitoring outer cylinder 41 and the upper surface of the part 1 to be connected. By setting a third tension spring 54, when the spacing between the connecting bolt 2 and the connecting nut 3 increases, the spacing between the positioning sleeve 42 and the monitoring outer cylinder 41 increases. At this time, the third tension spring 54 is reset, driving the top of the sealing tube 52 to always be movably engaged in the concave annular groove 521, and the lower surface of the sealing ring 55 is always in contact with the upper surface of the part 1 to be connected. An effective seal can still be performed between the bottom end of the positioning sleeve 42, the outside of the monitoring outer cylinder 41 and the upper surface of the part 1 to be connected.

A reset pointer 48 is fixedly installed on the outer wall of the positioning sleeve 42, and a reset groove 481 used in conjunction with the reset pointer 48 is provided on the upper surface of the monitoring outer cylinder 41; a transparent window 56 is fixedly provided on the top of the sealing outer cylinder 51, and the position of the transparent window 56 corresponds vertically to the position of the reset groove 481; by setting the reset pointer 48 and cooperating with the reset groove 481, when performing subsequent maintenance, it is necessary to reset the relative position between the positioning sleeve 42 and the monitoring outer cylinder 41 to facilitate subsequent real-time detection. When tightening the connecting bolt 2 and the connecting nut 3, the corresponding reset groove 481 and the reset pointer 48 are observed through the transparent window 56, so as to achieve the reset of the relative position between the positioning sleeve 42 and the monitoring outer cylinder 41, so as to facilitate subsequent real-time detection.

The micro-vibration monitoring system of the bolt includes a torque monitoring module, a tension monitoring module and a sealing module. The torque monitoring module includes a torque monitoring component, and the tension monitoring module includes a tension monitoring component. The torque monitoring component and the tension monitoring component are used in conjunction with each other. By setting the torque monitoring module and the tension monitoring module, wherein the tension monitoring component in the tension monitoring module and the torque monitoring component in the torque monitoring module are used in conjunction with each other, real-time monitoring of the micro-vibration generated by the connecting bolt 2 for twisting, and real-time monitoring of the increase in the distance between the connecting nut 3 and the connecting bolt 2 when the connecting nut 3 generates micro-vibration for twisting can be performed simultaneously, thereby effectively improving the micro-vibration monitoring effect of the bolt and improving the safety of the fixation between the connecting nut 3 and the connecting bolt 2.

Working principle: When in use, the fixing protrusion 49 is movably engaged in the corresponding fixing groove 101, the head of the connecting bolt 2 is movably engaged in the positioning sleeve 42, the connecting bolt 2 is movably passed through the two through grooves and the two to-be-connected parts 1, and the connecting nut 3 is threadedly fixed at the end, and the two to-be-connected parts 1 are bolted together through the connecting bolt 2 and the connecting nut 3;

At this time, the pressure ring 44 always presses against the tension outer cylinder 473 to limit the height of the tension outer cylinder 473, the electrical contact 475 always contacts the contact receiver 4751, and the contact receiver 4751 always receives the tension signal, indicating that the distance between the connecting bolt 2 and the connecting nut 3 has not changed significantly, and the first tension spring 478 and the second tension spring 479 are always in a compressed state;

At the same time, the sealing outer cylinder 51 is movably sleeved on the outside of the monitoring outer cylinder 41, the sealing tube 52 is movably sleeved on the outside of the force transmission tube 43, and the lower surface of the sealing ring 55 contacts the upper surface of the to-be-connected part 1, so as to effectively seal the bottom end of the positioning sleeve 42, the outer side of the monitoring outer cylinder 41 and the upper surface of the to-be-connected part 1;

In subsequent use, when the connecting bolt 2 generates a tiny vibration for twisting, the positioning sleeve 42 and the force transmission tube 43 are driven to rotate stably, the positioning sleeve 42 and the force transmission tube 43 are driven to rotate stably, the pressure ring 44 and the arc plate 45 are driven to rotate stably, and the arc plate 45 rotates stably to drive the side pressure plate 463 to rotate. When rotating a certain safe distance, the side pressure plate 463 will contact the corresponding signal receiver 462, and the signal receiver 462 transmits an electrical signal to the monitoring terminal, reminding the connecting bolt 2 at this location that a tiny vibration has been generated for twisting, so that subsequent maintenance personnel can perform precise maintenance on it, thereby realizing real-time monitoring of the tiny vibration of the bolt;

When the connecting nut 3 generates a small vibration and twists, the distance between the connecting nut 3 and the connecting bolt 2 increases, and the tension of the first tension spring 478 is cooperated to drive the tension ring 477 and the tension outer cylinder 473 to move upward, and the arc plate 45 is driven to move upward. At the same time, with the tension of the second tension spring 479, the electrical contact 475 will also contact the contact receiver 4751, and the contact receiver 4751 always receives the tension signal, indicating that the distance between the connecting bolt 2 and the connecting nut 3 has not changed significantly, until the connecting nut 3 generates a small vibration and twists and the distance between the connecting bolts 2 is large, the tension outer cylinder 473 continues to move upward, and drives the pressure rod 474 and the electrical contact 475 to move upward, and finally the electrical contact 475 does not contact the contact receiver 4751. At this time, the contact receiver 4751 will not receive the tension signal, and the monitoring terminal detects that the connecting nut 3 has generated a small vibration and twisted, which is convenient for subsequent maintenance personnel to perform precise maintenance on it, thereby realizing real-time monitoring of the small vibration of the bolt;

By providing a concave annular groove 521, and using a sealing outer cylinder 51, a sealing tube 52 and a sealing ring 55 in combination, an effective seal is performed between the bottom end of the positioning sleeve 42, the outside of the monitoring outer cylinder 41 and the upper surface of the part 1 to be connected, and when the positioning sleeve 42 and the force transmission tube 43 are stably rotated, an effective seal can still be performed between the bottom end of the positioning sleeve 42, the outside of the monitoring outer cylinder 41 and the upper surface of the part 1 to be connected, and by providing a third tension spring 54, when the spacing between the connecting bolt 2 and the connecting nut 3 increases, the spacing between the positioning sleeve 42 and the monitoring outer cylinder 41 is increased, at this time, the third tension spring 54 is reset, driving the top of the sealing tube 52 to always be movably engaged in the concave annular groove 521, and the lower surface of the sealing ring 55 is always in contact with the upper surface of the part 1 to be connected, and an effective seal can still be performed between the bottom end of the positioning sleeve 42, the outside of the monitoring outer cylinder 41 and the upper surface of the part 1 to be connected;

When performing subsequent maintenance, it is only necessary to observe the correspondence between the reset groove 481 and the reset pointer 48 through the transparent window 56 when tightening the connecting bolt 2 and the connecting nut 3, so as to achieve the reset of the relative position between the positioning sleeve 42 and the monitoring outer cylinder 41, which is convenient for subsequent real-time detection;

Among them, the micro-vibration monitoring system of the entire bolt includes a torque monitoring module, a tension monitoring module and a sealing module. The tension monitoring component in the tension monitoring module and the torque monitoring component in the torque monitoring module are used in conjunction with each other, and can simultaneously perform real-time monitoring of the micro-vibration and twisting of the connecting bolt 2, as well as real-time monitoring of the increase in the distance between the connecting nut 3 and the connecting bolt 2 when the connecting nut 3 generates micro-vibration and twists, thereby effectively improving the micro-vibration monitoring effect of the bolt and improving the safety of the fixation between the connecting nut 3 and the connecting bolt 2.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. The utility model provides a tiny vibration monitoring system of bolt, includes waiting connecting piece (1), its characterized in that: the two parts to be connected (1) are provided with two connecting bolts (2) which are movably inserted between the two parts to be connected (1), the bottoms of the connecting bolts (2) penetrate through the two parts to be connected (1) and are provided with connecting nuts (3) in a threaded manner, a monitoring mechanism (4) is arranged between the head of the connecting bolts (2) and the upper surface of the parts to be connected (1), and a sealing assembly (5) is arranged between the outer side of the monitoring mechanism (4) and the upper surface of the parts to be connected (1);

The monitoring mechanism (4) comprises a monitoring outer cylinder (41) and a positioning sleeve (42), the middle parts of the monitoring outer cylinder (41) and the positioning sleeve (42) are provided with through grooves, a connecting bolt (2) movably penetrates through the two through grooves, a monitoring cavity (411) is arranged in the monitoring outer cylinder (41), a force transmission pipe (43) is fixedly arranged in the middle of the bottom end of the positioning sleeve (42), a ring through groove (412) matched with the force transmission pipe (43) is formed in the middle of the top end of the monitoring outer cylinder (41), the bottom of the force transmission pipe (43) penetrates through the ring through groove (412) and extends into the monitoring cavity (411), a compression ring (44) is fixedly arranged at the bottom end of the force transmission pipe (43), an arc plate (45) is integrally formed in the outer side of the compression ring (44), the outer side of the arc plate (45) is contacted with the inner wall of the monitoring cavity (411), a torsion monitoring assembly (46) corresponding to the torsion monitoring assembly (45) is arranged on one side of the inner lower wall of the monitoring cavity (411), and the tension assembly (47) is fixedly arranged on one side of the lower wall of the monitoring cavity (46) close to the tension assembly (47);

The tension monitoring assembly (47) comprises a monitoring outer frame (471), one side of a torsion monitoring assembly (46) is close to the inner lower wall of a monitoring cavity (411) through the fixed mounting of the monitoring outer frame (471), a longitudinal sliding groove (4711) is formed in the middle of the top end of the monitoring outer frame (471), a limiting ring (472) is fixedly clamped at the top of the longitudinal sliding groove (4711), a tension outer cylinder (473) is movably inserted in the middle of the limiting ring (472), a compression rod (474) is arranged at the sliding clamp of the bottom end of the tension outer cylinder (473), an electric contact head (475) is fixedly mounted at the bottom end of the compression rod (474), a contact receiver (4751) matched with the electric contact head (475) is fixedly mounted on the inner lower wall of the longitudinal sliding groove (4711), the electric contact head (475) is in contact with the contact receiver (4751), and the upper surface of the tension outer cylinder (473) is in contact with the lower surface of the compression ring (44).

2. The system for monitoring the minute vibration of a bolt according to claim 1, wherein: the head movable joint of connecting bolt (2) is in positioning sleeve (42), two fixed protruding (49) of symmetric distribution are installed to the bottom fixed mounting of monitoring urceolus (41), fixed recess (101) that cooperation of protruding (49) was used with the fixed are offered to the upper surface of waiting connecting piece (1), fixed protruding (49) movable joint is in fixed recess (101) that correspond.

3. The system for monitoring the minute vibration of a bolt according to claim 2, wherein: the torsion monitoring assembly (46) comprises a fixing frame (461) and side pressure plates (463), the fixing frame (461) is fixedly arranged on one side of the inner lower wall of the monitoring cavity (411), the side pressure plates (463) are symmetrically distributed, the two side pressure plates (463) are respectively and vertically arranged at two end parts of the arc plate (45), and signal receivers (462) corresponding to the side pressure plates (463) are fixedly arranged at the top ends of the fixing frame (461).

4. The system for monitoring the minute vibration of a bolt according to claim 2, wherein: the bottom fixing clip of indulging spout (4711) is equipped with lantern ring (476), the middle part of lantern ring (476) is run through in tension urceolus (473) activity, the fixed cover in outside middle part of tension urceolus (473) is equipped with tension ring (477), be equipped with first tension spring (478) between tension ring (477) bottom and lantern ring (476) top, fixed mounting has second tension spring (479) between the interior upper wall of top and tension urceolus (473) of depression bar (474).

5. The system for monitoring the minute vibration of a bolt according to claim 2, wherein: seal assembly (5) are including sealed urceolus (51), the top middle part integrated into one piece of sealed urceolus (51) has sealed pipe (52), sealed urceolus (51) activity cup joints in the outside of monitoring urceolus (41), sealed pipe (52) activity cup joints in the outside of force transmission pipe (43), expansion groove (511) have been seted up to the bottom of sealed urceolus (51), the bottom slip card of expansion groove (511) is equipped with sealed intubate (53), the top of sealed intubate (53) and the interior upper wall fixed mounting of expansion groove (511) have third tension spring (54), the bottom fixed mounting of sealed intubate (53) has sealing washer (55), the lower surface of sealing washer (55) and the upper surface contact of waiting connecting piece (1), recess groove (521) that cooperate the use with sealed pipe (52) are seted up to the lower surface of location sleeve (42), the top activity card of sealed pipe (52) is in recess groove (521).

6. The system for monitoring the minute vibration of a bolt according to claim 5, wherein: the outer wall of the positioning sleeve (42) is fixedly provided with a reset pointer (48), and the upper surface of the monitoring outer cylinder (41) is provided with a reset groove (481) matched with the reset pointer (48).

7. The system for monitoring the minute vibration of a bolt according to claim 6, wherein: the top end fixing clamp of the sealing outer barrel (51) is provided with a transparent window (56), and the position of the transparent window (56) corresponds to the position of the reset groove (481) vertically.

8. The system for monitoring the minute vibration of a bolt according to claim 1, wherein: the micro vibration monitoring system of the bolt comprises a torsion monitoring module, a tension monitoring module and a sealing module.