Bolt pretightening force monitoring device

Abstract

The invention relates to a bolt pre-tightening force monitoring device, a pressure sensing module is provided with a first surface and a second surface which are opposite to each other and is provided with a cross-under channel, the cross-under channel penetrates through the first surface and the second surface and is used for allowing a bolt to penetrate through, the first surface is used for abutting against the head of the bolt, and the second surface is used for abutting against a connecting part; the mounting shell is provided with a mounting channel and a mounting cavity, a communication hole communicated with the mounting cavity is formed in the side wall of the mounting channel, the pressure sensing module is arranged in the mounting channel, the first surface is convexly arranged at one end of the mounting channel, and the second surface is convexly arranged at the other end of the mounting channel; and the monitoring module is arranged in the mounting cavity and is electrically connected with the pressure sensing module through the communicating hole. Compared with the prior art, the bolt pre-tightening force monitoring device has the advantages that the bolt pre-tightening force can be monitored, the pressure sensing module and the monitoring module in the mounting cavity can be protected through the mounting shell, the structure is simple, and the manufacturing cost is low.

Description

Technical Field

[0001] The present application relates to the technical field of bolt preload monitoring, and in particular to a bolt preload monitoring device. Background Art

[0002] Bolt connection is a common form of connection in mechanical connection. When the bolts on a connecting component are loose, the stability and bearing capacity of the connecting component will decrease, which will lead to safety hazards. In order to enable the staff to detect the loosening of the bolts on the connecting component in time, a pressure sensor is usually installed between the bolt and the connecting component, and the preload force of the bolt is monitored by monitoring the pressure value of the pressure sensor.

[0003] Since the pressure sensor is exposed to the external environment for a long time, in order to prevent adverse factors such as high temperature, impurities or rain from affecting the electronic components on the pressure sensor, traditional technology usually requires a complex protective structure to be set on the pressure sensor to protect the electronic components, which is difficult to manufacture and thus increases the manufacturing cost of the pressure sensor. Summary of the invention

[0004] Based on this, it is necessary to provide a bolt preload monitoring device to address the problem that in traditional technology, a complex protective structure needs to be set on the pressure sensor to protect the electronic components, resulting in high manufacturing difficulty.

[0005] The technical solution is as follows:

[0006] One embodiment provides a bolt preload monitoring device, comprising:

[0007] A pressure sensing module, the pressure sensing module having a first surface and a second surface opposite to each other and provided with a connection channel, the connection channel passing through the first surface and the second surface and used for a bolt to pass through, the first surface being used to abut against a head of the bolt, and the second surface being used to abut against a connecting component;

[0008] A mounting shell, wherein the mounting shell has a mounting channel and a mounting cavity, a side wall of the mounting channel is provided with a communication hole communicating with the mounting cavity, the pressure sensing module is arranged in the mounting channel, the first surface is protrudingly arranged at one end of the mounting channel, and the second surface is protrudingly arranged at the other end of the mounting channel; and

[0009] A monitoring module is disposed in the installation cavity, and the monitoring module is electrically connected to the pressure sensing module through the connecting hole.

[0010] In the above-mentioned bolt preload monitoring device, the pressure sensing module is arranged in the installation channel of the installation shell. When in use, the bolt is passed through the connection channel of the pressure sensing module and is threadedly connected with the connecting component. Since the first surface and the second surface of the pressure sensing module are respectively protruded and arranged at the two ends of the installation channel, the head of the bolt and the connecting component can press the pressure sensing module, and the monitoring module arranged in the installation cavity of the installation shell can be electrically connected to the pressure sensing module through the connecting hole to obtain the pressure value of the pressure sensing module in real time, thereby realizing the monitoring of the bolt preload; compared with the traditional technology, the above-mentioned bolt preload monitoring device can protect the pressure sensing module and the monitoring module in the installation cavity through the installation shell while realizing the monitoring of the bolt preload. It has a simple structure and low manufacturing difficulty, thereby reducing the manufacturing cost of the bolt preload monitoring device.

[0011] In one of the embodiments, the bolt preload force monitoring device further includes a cover body, the mounting shell is provided with an opening, the opening is communicated with the mounting cavity, and the cover body covers the opening.

[0012] In one embodiment, the cover body is provided with a first connecting piece, the installation cavity is provided with a first connecting fitting piece, and the first connecting piece is assembled with the first connecting fitting piece.

[0013] In one embodiment, the first connecting member includes a first threaded component, the first connecting member is provided with a first screw hole, the cover body is provided with a first mounting through hole, the first threaded component is passed through the first mounting through hole and is screwed to the first screw hole.

[0014] In one embodiment, the monitoring module includes an antenna unit, and the antenna unit is arranged on a side of the cover body facing the installation cavity. A signal transmission through hole is provided on a side of the installation shell close to the opening, and the antenna unit can transmit signals through the signal transmission through hole.

[0015] In one of the embodiments, at least two signal transmission through holes are provided, and all of the signal transmission through holes are arranged at intervals along the circumference of the opening.

[0016] In one embodiment, the cover body includes a cover body and an assembly portion, the assembly portion is arranged along the circumference of the cover body, a reinforcing plate is provided in the installation cavity, the reinforcing plate is provided with a matching portion, the matching portion is spaced apart from the inner wall of the installation cavity to form an assembly gap, and the end of the assembly portion away from the cover body can enter and exit the assembly gap.

[0017] In one embodiment, the bolt preload force monitoring device also includes a second threaded component, the side wall of the mounting channel is also provided with a second mounting through hole connected to the mounting cavity, the pressure sensing module is provided with a second screw hole, and the second threaded component is passed through the second mounting through hole and is screwed to the second screw hole.

[0018] In one embodiment, the pressure sensing module includes a pressure-bearing member and a strain member, the pressure-bearing member has the first surface and the second surface opposite to each other and is provided with the connection channel, the side wall of the pressure-bearing member is provided with an installation groove, the notch of the installation groove is arranged toward the connecting hole, the strain member is arranged on the bottom wall of the installation groove, and the monitoring module is electrically connected to the strain member through the connecting hole.

[0019] In one embodiment, the pressure sensing module also includes a first sealing ring and a second sealing ring, and the side wall of the pressure-bearing part is provided with a first annular groove and a second annular groove, the first annular groove is located between the mounting groove and the first surface, and the second annular groove is located between the mounting groove and the second surface, the first sealing ring is arranged in the first annular groove and abuts against the side wall of the mounting channel, and the second sealing ring is arranged in the second annular groove and abuts against the side wall of the mounting channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 Schematic diagram of the external structure of a bolt preload monitoring device in one embodiment of the present application.

[0022] Figure 2 This is an exploded view of a bolt preload monitoring device in one embodiment of the present application.

[0023] Figure 3 It is an exploded view of a mounting shell in one embodiment of the present application.

[0024] Figure 4 It is a schematic diagram of the structure inside the installation cavity in one embodiment of the present application.

[0025] Figure 5 for Figure 1 Schematic diagram of the structure of the AA section.

[0026] Figure 6 This is a schematic diagram of a full-bridge circuit with four 120-ohm resistors evenly distributed axially in an embodiment of the present application.

[0027] Figure 7 This is a schematic diagram of a full-bridge circuit with eight 350-ohm resistors uniformly distributed axially and eight 350-ohm resistors uniformly distributed circumferentially in one embodiment of the present application.

[0028] Notes on the attached drawings:

[0029] 100, pressure sensing module; 110, pressure bearing member; 111, first surface; 112, second surface; 113, connection channel; 114, mounting groove; 115, first annular groove; 116, second annular groove; 200, mounting shell; 210, mounting channel; 220, mounting cavity; 221, first chamber; 222, second chamber; 223, partition; 230, communication hole; 240, opening; 250, signal transmission through hole; 300, monitoring module; 310, circuit board; 320, power supply member; 330 , antenna unit; 400, cover body; 410, light-transmitting hole; 420, first mounting through hole; 430, cover body; 440, assembly part; 441, sealing ring; 450, reinforcing rib; 510, first threaded component; 520, first connecting fitting; 521, first screw hole; 600, reinforcing plate; 610, fitting part; 620, assembly gap; 630, mounting part; 631, first screw hole; 632, second screw hole; 633, threading groove; 720, second mounting through hole; 730, second screw hole. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0036] See also Figures 1 to 5An embodiment of the present application provides a bolt preload monitoring device, including a pressure sensing module 100, a mounting shell 200 and a monitoring module 300. The pressure sensing module 100 has a first surface 111 and a second surface 112 opposite to each other and is provided with a connection channel 113. The connection channel 113 passes through the first surface 111 and the second surface 112 and is used for bolts to pass through. The first surface 111 is used to abut against the head of the bolt, and the second surface 112 is used to abut against the connecting component; the mounting shell 200 has a mounting channel 210 and a mounting cavity 220. The side wall of the mounting channel 210 is provided with a connecting hole 230 connected to the mounting cavity 220. The pressure sensing module 100 is arranged in the mounting channel 210, the first surface 111 is protruded at one end of the mounting channel 210, and the second surface 112 is protruded at the other end of the mounting channel 210; the monitoring module 300 is arranged in the mounting cavity 220, and the monitoring module 300 is electrically connected to the pressure sensing module 100 through the connecting hole 230.

[0037] In the above-mentioned bolt preload monitoring device, the pressure sensing module 100 is arranged in the installation channel 210 of the installation shell 200. When in use, the bolt is passed through the connection channel 113 of the pressure sensing module 100 and is screwed with the connecting component. Since the first surface 111 and the second surface 112 of the pressure sensing module 100 are respectively protruded and arranged at the two ends of the installation channel 210, the head of the bolt and the connecting component can press the pressure sensing module 100, and the monitoring module 300 arranged in the installation cavity 220 of the installation shell 200 can be electrically connected to the pressure sensing module 100 through the connecting hole 230 to obtain the pressure value of the pressure sensing module 100 in real time, thereby realizing the monitoring of the bolt preload; compared with the traditional technology, the above-mentioned bolt preload monitoring device can protect the pressure sensing module 100 and the monitoring module 300 in the installation cavity 220 through the installation shell 200 while realizing the monitoring of the bolt preload. It has a simple structure and low manufacturing difficulty, thereby reducing the manufacturing cost of the bolt preload monitoring device.

[0038] For explanation, the connecting components in the above embodiments may be structures in equipment such as towers, rails, and shield machines that need to be fixed by bolts.

[0039] Furthermore, in some embodiments, the bolt preload force monitoring module 300 can also be used as a gasket between the bolt and the connecting component. In this way, the preload force of the bolt can be monitored while alleviating the stress distribution between the bolt and the connecting component and preventing mutual wear between the bolt and the connecting component.

[0040] By way of explanation, the first surface 111 and the second surface 112 of the pressure sensing module 100 are respectively protruded from the opposite ends of the mounting channel 210, so that the pressure sensing module 100 can be effectively compressed between the head of the bolt and the connecting component, ensuring the accuracy of monitoring the preload force of the bolt.

[0041] In one embodiment, the first surface 111 of the pressure sensor protrudes from the plane where one end of the mounting channel 210 is located by about 0.5 mm-3 mm, and the second surface 112 of the pressure sensor protrudes from the plane where one end of the mounting channel 210 is located by about 0.5 mm-3 mm.

[0042] See also Figure 3 In one embodiment, the monitoring module 300 includes a circuit board 310 and a power supply 320. The wire on the circuit board 310 is passed through the connecting hole 230 and is electrically connected to the pressure sensing module 100. The power supply 320 is electrically connected to the circuit board 310 and is used to supply power to the circuit board 310, thereby realizing the monitoring of the pressure value received by the pressure sensing module 100.

[0043] In one embodiment, the circuit board 310 is provided with circuits for voltage regulation, amplification, filtering, A / D conversion, signal reception and transmission, data processing, etc., as well as electrical components such as light-emitting diodes (LEDs), sliding switches, RF coaxial connectors, and wire-to-board pin headers.

[0044] See also Figure 1 to Figure 2 In one embodiment, the bolt preload force monitoring device further includes a cover body 400 , the mounting shell 200 is provided with an opening 240 , the opening 240 is communicated with the mounting cavity 220 , and the cover body 400 covers the opening 240 .

[0045] The cover body 400 covers the opening 240 of the mounting shell 200 to open or close the opening 240 , which not only facilitates the staff to install, disassemble and repair the monitoring module 300 in the mounting cavity 220 , but also prevents the external environment from affecting the monitoring module 300 in the mounting cavity 220 .

[0046] See also Figure 4 In one embodiment, a partition 223 is provided in the installation cavity 220, and the partition 223 separates the installation cavity 220 into a first cavity 221 and a second cavity 222. Both the first cavity 221 and the second cavity 222 are connected to the opening 240, the circuit board 310 is provided in the first cavity 221, and the power supply 320 is provided in the second cavity 222.

[0047] Furthermore, the power supply 320 is a battery.

[0048] In one embodiment, the cover body 400 is also provided with a light-transmitting hole 410, the position of the light-transmitting hole 410 corresponds to the position of the light-emitting diode LED on the circuit board 310, and the light-emitting diode LED can display the working status of the bolt preload monitoring device through color, such as normal operation, battery replacement or fault status.

[0049] Furthermore, the circuit board 310 has the following functions: four terminals (or terminals) are provided on the circuit board 310, two of which are used to supply power to the pressure sensing module 100, and the other two terminals are used to receive analog voltage signals; the working environment of the circuit board 310 is -35°C to 70°C; the bridge excitation voltage provided by the power module on the circuit board 310 does not change with the reduction of battery power, and the analog signal processing module on the circuit board 310 performs filtering, noise reduction, amplification and other processing on the received mV-level analog signal; the processing range of the analog signal can be set in the user software; the analog signal receiving time can be selected from five options of 0.01s, 0.1s, 1s, 3s, and 5s, which can be defined in the software; the A / D conversion module on the circuit board 310 performs A / D conversion on the processed voltage signal, and adopts The sampling frequency can be set between 62.5, 125, 250, 500, and 1000 Hz; the sampling resolution is 24 bits; the digital signal of the pressure sensing module 100 is processed with peak value and average value, and the digital signal is stored; the sensor number can be stored; the time information of receiving the analog signal can be stored; it has a certain data processing capability, and when the detected digital signal is input, the input can be processed with a polynomial of the fifth power; a confirmation message is sent to the receiver before data is sent, and data transmission starts after the receiver sends a confirmation message; a confirmation message is sent after the data is sent; the peak value of the digital signal, the average value of the digital signal, the sensor number, and the remaining battery power can be sent to the data receiver; in an unobstructed environment, the transmission distance is ≥150m; lightning resistance.

[0050] Furthermore, the bolt preload monitoring device has two working states: timing state and detection state. These two working states can be set and switched on the software side. Timing state: collects and sends signals at a fixed time every day. Detection state: can wake up from the timing state and then work once every period of time to test the performance of the bolt preload monitoring device.

[0051] In one embodiment, the circuit board 310 is a rectangular plate, and the circuit board 310 is provided with a threading hole, two screw holes, and two copper pillar holes. The positions and spacings of the two screw holes can be adjusted according to the circuit. The circuit board 310 is placed on two short copper pillars connected to the two screw holes, and the height of the copper pillars and the height of the space above the circuit board 310 can be adjusted according to the height requirements of the components on the circuit board 310.

[0052] In some embodiments, see Figure 3 to Figure 4 The circuit board 310 is arranged in the first chamber 221, and the plane where the circuit board 310 is located is perpendicular to the axis of the installation channel 210. A clamping groove is respectively opened on the left and right sides of the first chamber 221, and the opposite sides of the circuit board 310 are respectively clamped with the two clamping grooves. A notch is respectively provided at the two corners of the circuit board 310 on the side close to the opening 240, and the notch can abut against the step on the assembly part 440 of the cover body 400 to achieve the limitation of the circuit board 310; in other embodiments, the plane where the circuit board 310 is located can also be parallel to the axis of the installation channel 210, that is, the arrangement of the circuit board 310 can be flexibly arranged according to the internal space and wiring of the installation shell 200, which will not be repeated here.

[0053] The battery has a life of more than 3 years under the condition of ambient temperature of -20℃~50℃. It has the function of uploading the remaining power; the battery is replaceable: easy to install and replace. After the battery is replaced (i.e. restarting the bolt preload monitoring device), the "zero point" is not affected. The installation shell 200 is provided with a physical switch, which can control the start, shutdown and restart of the bolt preload monitoring device. The battery can be a rechargeable battery.

[0054] See also Figure 2 In one embodiment, the cover body 400 is provided with a first connecting piece, and a first connecting fitting piece 520 is provided in the installation cavity 220 , and the first connecting piece and the first connecting fitting piece 520 are assembled.

[0055] The cover body 400 is assembled with the first connecting member 520 in the installation cavity 220 through the first connecting member, thereby achieving the covering of the cover body 400 on the opening 240 .

[0056] Optionally, the first connecting member and the first connecting fitting 520 may be assembled in the form of protrusions and grooves, or may be assembled in the form of snap-fitting, snap-fitting, or bonding, which is not specifically limited here.

[0057] See also Figure 2 and Figure 4 In one embodiment, the first connecting member includes a first threaded component 510, the first connecting fitting 520 is provided with a first screw hole 521, the cover body 400 is provided with a first mounting through hole 420, the first threaded component 510 is passed through the first mounting through hole 420 and is screwed to the first screw hole 521.

[0058] The first threaded component 510 can pass through the first mounting through hole 420 on the cover body 400 and be screwed to the first screw hole 521 to achieve the covering of the cover body 400 on the opening 240. The assembly and disassembly between the cover body 400 and the mounting shell 200 can be achieved by rotating the first threaded component 510. The implementation cost is low and the installation effect is reliable.

[0059] Furthermore, there are at least two first threaded components 510, the cover body 400 is provided with at least two first mounting through holes 420 which are arranged one-to-one corresponding to the first threaded components 510, and there are at least two first connecting fittings 520 which are arranged one-to-one corresponding to the first threaded components 510; in this way, the cover body 400 can achieve a better covering effect.

[0060] See also Figure 2 In one embodiment, the first connection fitting 520 includes a connection fitting column, one end of which is disposed on the inner wall of the mounting cavity 220 , and the other end of which is provided with a first screw hole 521 .

[0061] In one embodiment, the first screw hole 521 is a hexagonal copper column hole.

[0062] See also Figures 1 to 3 as well as Figure 5 In one embodiment, the monitoring module 300 includes an antenna unit 330, which is disposed on a side of the cover body 400 facing the installation cavity 220. A signal transmission through hole 250 is provided on a side of the installation shell 200 close to the opening 240, and the antenna unit 330 can transmit signals through the signal transmission through hole 250.

[0063] The antenna unit 330 is disposed on a side of the cover body 400 facing the mounting cavity 220. When the cover body 400 covers the opening 240, the antenna unit 330 is also located in the mounting cavity 220 to protect the antenna unit 330. In addition, the antenna unit 330 is disposed on the cover body 400, and a signal transmission through hole 250 is provided on a side of the mounting shell 200 close to the opening 240, which can prevent the mounting shell 200 from affecting the signal transmission effect of the antenna unit 330, thereby improving the signal transmission effect of the antenna unit 330.

[0064] In one embodiment, the antenna unit 330 includes a patch antenna, one side of which is attached to a side of the cover 400 facing the mounting cavity 220 , so as to transmit signals through the signal transmission through hole 250 .

[0065] By way of explanation, in order to ensure the signal transmission effect of the antenna unit 330, the cover body 400 is usually made of a non-metallic material that can transmit signals. In this way, the antenna unit 330 can not only transmit signals through the cover body 400, but also transmit signals through the signal transmission through hole 250, thereby further improving the reliability of signal transmission.

[0066] See also Figures 1 to 3 In one embodiment, at least two signal transmission through holes 250 are provided, and all signal transmission through holes 250 are arranged at intervals along the circumference of the opening 240 .

[0067] At least two signal transmission holes 250 are arranged at circumferential intervals along the opening 240. In this way, the signal of the antenna unit 330 can be transmitted through at least two signal transmission holes 250, so that the antenna unit 330 can realize signal transmission in different directions, further improving the signal transmission effect of the antenna unit 330.

[0068] In one embodiment, the cover 400 is made of a non-metal material and has the ability to transmit wireless signals, thereby ensuring that the antenna unit 330 can achieve signal transmission.

[0069] See also Figure 2 and Figure 5 In one embodiment, the cover body 400 includes a cover body 430 and an assembly portion 440, the assembly portion 440 is arranged along the circumference of the cover body 430, a reinforcing plate 600 is provided in the installation cavity 220, the reinforcing plate 600 is provided with a matching portion 610, the matching portion 610 is spaced apart from the inner wall of the installation cavity 220 to form an assembly gap 620, and the end of the assembly portion 440 away from the cover body 430 can enter and exit the assembly gap 620.

[0070] The assembly part 440 arranged along the circumference of the cover body 430 can enter the installation cavity 220 through the opening 240, and the assembly part 440 can enter the assembly gap 620 formed between the matching part 610 of the reinforcing plate 600 and the inner wall of the installation cavity 220. The assembly gap 620 formed between the matching part 610 of the reinforcing plate 600 and the inner wall of the installation cavity 220 can achieve a certain limit on the assembly part 440 to prevent the assembly part 440 from being deformed, which will cause the sealing effect of the cover body 400 on the installation cavity 220 to deteriorate.

[0071] Furthermore, a sealing ring 441 is sleeved on the outer periphery of the assembly portion 440 , and the sealing ring 441 abuts between the assembly portion 440 and the inner wall of the installation cavity 220 to further improve the sealing effect of the cover body 400 on the installation cavity 220 .

[0072] Furthermore, in order to ensure the signal transmission effect of the antenna module, the assembly part 440 is made of non-metallic material with relatively low strength. Since the sealing ring 441 will cause a certain tightening effect on the assembly part 440, the assembly part 440 will produce a certain degree of deformation when it is tightened by the sealing ring 441 for a long time. In the present application, the assembly part 440 is limited by the assembly gap 620, so that the reinforcement plate 600 can provide the assembly part 440 with a force in the direction of the sealing ring 441 to prevent the assembly part 440 from being deformed.

[0073] See also Figure 5 In one embodiment, a reinforcing rib 450 is provided between the cover body 430 and the assembly portion 440 , and a plurality of reinforcing ribs 450 are provided and are spaced apart along the circumference of the cover body 430 .

[0074] See also Figures 4 to 5 In one embodiment, two reinforcing plates 600 are provided, wherein one reinforcing plate 600 is provided in the first cavity 221 , and the other reinforcing plate 600 is provided in the second cavity 222 .

[0075] For explanation, whether to set the reinforcing rib 450 is determined by the strength of the cover body 400. When the material strength of the cover body 400 is low, in order to prevent the cover body 400 from deforming during production and use, it is necessary to set the reinforcing rib 450. If the strength of the cover body 400 itself is sufficient, there is no need to set the reinforcing rib 450, which will not be repeated here.

[0076] See also Figures 3 to 5 In one embodiment, a mounting portion 630 is bent on one side of the reinforcing plate 600 away from the mating portion 610, the mounting portion 630 is provided with a first screw hole 631, and a second screw hole 632 is provided on the side wall of the mounting cavity 220. The reinforcing plate 600 is fixed in the mounting cavity 220 by sequentially inserting screws into the first screw hole 631 and the second screw hole 632.

[0077] For further information, see Figure 4 The mounting portion 630 is further provided with a wire threading groove 633, the position of which corresponds to the position of the connecting hole 230, so as to facilitate the routing of the wires when the pressure sensing module 100 and the monitoring module 300 are electrically connected through the wires.

[0078] See also Figure 5 In one embodiment, the bolt preload force monitoring device further includes a second threaded component (not shown in the figure), the side wall of the mounting channel 210 further defines a second mounting through hole 720 communicating with the mounting cavity 220, the pressure sensing module 100 defines a second screw hole 730, and the second threaded component passes through the second mounting through hole 720 and is screwed to the second screw hole 730.

[0079] The second threaded component passes through the second mounting through hole 720 and is threadedly connected to the second screw hole 730 on the pressure sensing module 100 to position the pressure sensing module 100 located in the mounting channel 210 to prevent the pressure sensor from moving in the mounting channel 210 and affecting the monitoring accuracy of the bolt preload.

[0080] Furthermore, when assembling the bolt preload monitoring device, the pressure sensing module 100 is first placed in the installation channel 210, the second threaded component is placed in the installation cavity 220, and then the second threaded component is passed through the second installation through hole 720 and assembled with the second screw hole 730 on the pressure sensing module 100 to achieve the positioning of the pressure sensing module 100.

[0081] Optionally, the first threaded component 510 and the second threaded component may be screws, studs, bolts and other components, which are not specifically limited here.

[0082] In one embodiment, the pressure sensing module 100 is a cylinder. In order to prevent the cylindrical pressure sensing module 100 from rotating in the installation channel 210, a second threaded component is provided to pass through the second installation through hole 720 and is threadedly connected to the second screw hole 730 on the pressure sensing module 100, thereby preventing the pressure sensing module 100 from rotating in the installation channel 210.

[0083] See also Figure 1 and Figure 5 In one embodiment, the pressure sensing module 100 includes a pressure-bearing member 110 and a strain member (not shown in the figure), the pressure-bearing member 110 has a first surface 111 and a second surface 112 opposite to each other and is provided with a connection channel 113, a side wall of the pressure-bearing member 110 is provided with a mounting groove 114, the notch of the mounting groove 114 is arranged toward the connecting hole 230, the strain member is arranged on the bottom wall of the mounting groove 114, and the monitoring module 300 is electrically connected to the strain member through the connecting hole 230.

[0084] When the head of the bolt and the connecting component press the pressure-bearing part 110, the pressure-bearing part 110 will be deformed due to the pressure. The strain member arranged in the installation groove 114 on the side wall of the pressure-bearing part 110 can obtain the deformation of the pressure-bearing part 110. The monitoring module 300 is electrically connected to the strain member through the connecting hole 230 to obtain the deformation of the strain member, and calculates the pressure value exerted on the pressure-bearing part 110 according to the deformation of the strain member, thereby obtaining the preload force of the bolt. The strain member is arranged in the installation groove 114 on the side wall of the pressure-bearing part 110, which not only facilitates the electrical connection between the strain member and the monitoring module 300 and simplifies the winding process, but also has a certain protective effect on the strain member, preventing the strain member from being damaged by the influence of the external environment, thereby improving the overall service life of the bolt preload force monitoring device.

[0085] See also Figure 1 and Figure 5 In one embodiment, the pressure sensing module 100 further includes a first sealing ring and a second sealing ring (not shown in the figure), and a first annular groove 115 and a second annular groove 116 are formed on the side wall of the pressure bearing member 110. The first annular groove 115 is located between the mounting groove 114 and the first surface 111, and the second annular groove 116 is located between the mounting groove 114 and the second surface 112. The first sealing ring is disposed in the first annular groove 115 and abuts against the side wall of the mounting channel 210, and the second sealing ring is disposed in the second annular groove 116 and abuts against the side wall of the mounting channel 210.

[0086] The first sealing ring and the second sealing ring can have a certain sealing effect on the installation groove 114, thereby preventing the external environment from affecting the strain member in the installation groove 114, and improving the monitoring accuracy and service life of the bolt preload monitoring device.

[0087] See also Figure 1 In one embodiment, the pressure-bearing member 110 is a cylinder, and the opposite ends of the cylindrical pressure-bearing member 110 are penetrated by the connecting channel 113, and the first annular groove 115, the installation groove 114 and the second annular groove 116 are arranged at intervals along the height direction of the cylindrical pressure-bearing member 110.

[0088] In one embodiment, the strain member includes a strain gauge, and a plurality of strain gauges are provided to form a 1 / 4 bridge, half bridge or full bridge circuit, thereby realizing the monitoring of the deformation of the pressure bearing member 110, and the resistance value of the strain gauge can be selected from 120 ohms, 350 ohms, and 1000 ohms.

[0089] As an example, Figure 6 The four 120 ohm axially evenly distributed full-bridge circuit shown, Figure 7 The full-bridge circuit shown is composed of eight 350-ohm resistors evenly distributed axially and eight 350-ohm resistors evenly distributed circumferentially.

[0090] In one embodiment, the pressure-bearing member 110 is made of high-strength stainless steel material, such as martensitic stainless steel, with a yield strength of not less than 1100 MPa and a tensile strength of not less than 1300 MPa, and the surface hardness of the pressure-bearing member 110 is 35HRC-45HRC, and the surface hardness of the mounting shell 200 is 35HRC-40HRC. The material of the mounting shell 200 can be austenitic stainless steel, such as 304 stainless steel, and the material of the cover body 400 is reinforced polyurethane material.

[0091] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A bolt preload monitoring device, characterized in that: include: A pressure sensing module, the pressure sensing module having a first surface and a second surface opposite to each other and provided with a connection channel, the connection channel passing through the first surface and the second surface and used for a bolt to pass through, the first surface being used to abut against a head of the bolt, and the second surface being used to abut against a connecting component; A mounting shell, wherein the mounting shell has a mounting channel and a mounting cavity, a side wall of the mounting channel is provided with a communication hole communicating with the mounting cavity, the pressure sensing module is arranged in the mounting channel, the first surface is protrudingly arranged at one end of the mounting channel, and the second surface is protrudingly arranged at the other end of the mounting channel; as well as A monitoring module is disposed in the installation cavity, and the monitoring module is electrically connected to the pressure sensing module through the connecting hole.

2. The bolt preload monitoring device according to claim 1, characterized in that: The bolt preload monitoring device further comprises a cover body, the mounting shell is provided with an opening, the opening is communicated with the mounting cavity, and the cover body covers the opening.

3. The bolt preload monitoring device according to claim 2, characterized in that: The cover body is provided with a first connecting piece, the installation cavity is provided with a first connecting fitting piece, and the first connecting piece is assembled with the first connecting fitting piece.

4. The bolt preload monitoring device according to claim 3, characterized in that: The first connecting member includes a first threaded component, the first connecting fitting is provided with a first screw hole, the cover body is provided with a first mounting through hole, the first threaded component is passed through the first mounting through hole and is screwed to the first screw hole.

5. The bolt preload monitoring device according to claim 2, characterized in that: The monitoring module includes an antenna unit, which is arranged on a side of the cover body facing the installation cavity. A signal transmission through hole is provided on a side of the installation shell close to the opening, and the antenna unit can transmit signals through the signal transmission through hole.

6. The bolt preload monitoring device according to claim 5, characterized in that: There are at least two signal transmission through holes, and all of the signal transmission through holes are arranged at intervals along the circumference of the opening.

7. The bolt preload monitoring device according to claim 2, characterized in that: The cover body includes a cover body and an assembly part, the assembly part is arranged along the circumference of the cover body, a reinforcing plate is provided in the installation cavity, the reinforcing plate is provided with a matching part, the matching part is spaced apart from the inner wall of the installation cavity to form an assembly gap, and the end of the assembly part away from the cover body can enter and exit the assembly gap.

8. The bolt preload monitoring device according to claim 1, characterized in that: The bolt preload monitoring device also includes a second threaded component, the side wall of the mounting channel is also provided with a second mounting through hole connected to the mounting cavity, the pressure sensing module is provided with a second screw hole, and the second threaded component is passed through the second mounting through hole and is screwed to the second screw hole.

9. The bolt preload monitoring device according to claim 1, characterized in that: The pressure sensing module includes a pressure-bearing member and a strain member, the pressure-bearing member has the first surface and the second surface opposite to each other and is provided with the connection channel, the side wall of the pressure-bearing member is provided with a mounting groove, the notch of the mounting groove is arranged toward the connecting hole, the strain member is arranged on the bottom wall of the mounting groove, and the monitoring module is electrically connected to the strain member through the connecting hole.

10. The bolt preload monitoring device according to claim 9, characterized in that: The pressure sensing module also includes a first sealing ring and a second sealing ring. The side wall of the pressure-bearing part is provided with a first annular groove and a second annular groove. The first annular groove is located between the mounting groove and the first surface, and the second annular groove is located between the mounting groove and the second surface. The first sealing ring is arranged in the first annular groove and abuts against the side wall of the mounting channel, and the second sealing ring is arranged in the second annular groove and abuts against the side wall of the mounting channel.

Images