Online monitoring device for tightness of high-strength bolt

Abstract

The utility model relates to the technical field of bolt safety, in particular to a high-strength bolt tightness on-line monitoring device which comprises a bolt body, a mounting groove is formed in the bottom of the bolt body, a monitoring mechanism is arranged in the mounting groove, the monitoring mechanism comprises a fixing block, a middle rod is fixedly arranged at the lower end of the fixing block, and the middle rod is fixedly connected with the bolt body. A pressure sensor is fixedly arranged at one end of the middle rod; the annular plate is arranged on the surface of the middle rod in a sleeving mode, and the lower end of the middle rod is fixed to the top plate through a plurality of connecting rods; when the bolt body is tightened, the top plate is jacked into the mounting groove, the top plate drives the annular plate to be separated from the pressure sensor through the connecting rod, when the bolt body is loosened, the spring drives the annular plate to move so as to abut against the pressure sensor, and the pressure sensor transmits data back to a terminal through the connecting line; and meanwhile, the resistance is infinite, so that the resistance is known by the terminal.

Description

Technical Field

[0001] This utility model relates to the field of bolt safety technology, specifically to an online monitoring device for the tightness of high-strength bolts. Background Technology

[0002] In industrial settings such as machinery operation, high-strength bolts are frequently used for fastening and fixing, such as the bolts securing the top cover of hydroelectric generator sets in hydropower stations. If these bolts loosen or fracture due to fatigue, the top cover could be forced open under high water pressure, potentially causing a major safety accident. Similarly, loosening or fatigue fracture of the fixing bolts on wind turbine towers could lead to serious accidents such as tower collapse. Therefore, an online monitoring device for the tightness of high-strength bolts is needed to address these issues. Utility Model Content

[0003] The purpose of this invention is to provide an online monitoring device for the tightness of high-strength bolts, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An online monitoring device for the tightness of high-strength bolts includes a bolt body, a mounting groove at the bottom of the bolt body, and a monitoring mechanism inside the mounting groove. The monitoring mechanism includes:

[0006] A fixed block, wherein a middle rod is fixedly provided at the lower end of the fixed block, and a pressure sensor is fixedly provided at one end of the middle rod;

[0007] An annular plate is sleeved on the surface of the intermediate rod, and the lower end of the intermediate rod is fixed to the top plate by several connecting rods;

[0008] A spring is provided at the bottom of the mounting groove, and the upper end of the spring is fixedly connected to the annular plate.

[0009] As a preferred embodiment of this utility model, a conductive wire is provided at the center of the bolt body, and the two ends of the conductive wire are respectively connected to a power connector and a pressure sensor.

[0010] As a preferred embodiment of this utility model, the electrical connector is fixedly disposed on the upper end of the bolt body.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. In this utility model, as the bolt body is tightened, the top plate is pushed into the mounting groove. The top plate then drives the annular plate to disengage from the pressure sensor via the connecting rod. When the bolt body loosens, the spring will drive the annular plate to move and thus hold the pressure sensor in place. The pressure sensor will transmit data back to the terminal via the connecting line. When the bolt body breaks, the connection of the pressure sensor will be lost, and the resistance will be infinitely large, thus being known by the terminal. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall internal structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the monitoring mechanism structure of this utility model;

[0015] Figure 3 This is a top view schematic diagram of the monitoring mechanism of this utility model;

[0016] Figure 4 This is a schematic diagram of the monitoring mechanism of this utility model from below.

[0017] In the diagram: 1. Connector; 2. Bolt body; 3. Fixing block; 4. Spring; 5. Annular plate; 6. Intermediate rod; 7. Pressure sensor; 8. Connecting rod; 9. Top plate; 10. Monitoring mechanism; 11. Mounting slot. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0020] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0022] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0023] Please see Figure 1-4 This utility model provides a technical solution:

[0024] An online monitoring device for the tightness of high-strength bolts includes a bolt body 2, a mounting groove 11 at the bottom of the bolt body 2, and a monitoring mechanism 10 inside the mounting groove 11. The monitoring mechanism 10 includes:

[0025] A fixing block 3 is fixedly provided with an intermediate rod 6 at its lower end, and a pressure sensor 7 is fixedly provided at one end of the intermediate rod 6.

[0026] The annular plate 5 is sleeved on the surface of the intermediate rod 6, and the lower end of the intermediate rod 6 is fixed to the top plate 9 by several connecting rods 8.

[0027] A spring 4 is provided at the bottom of the mounting groove 11. The upper end of the spring 4 is fixedly connected to the annular plate 5. As the bolt body 2 is tightened, the top plate 9 is pushed into the mounting groove 11. The top plate 9 then drives the annular plate 5 to disengage from the pressure sensor 7 through the connecting rod 8. When the bolt body 2 is loose, the spring 4 will drive the annular plate 5 to move and thus hold the pressure sensor 7 in place. The pressure sensor 7 will transmit data back to the terminal through the connecting line. When the bolt body 2 breaks, the connection of the pressure sensor 7 will be lost, and the resistance will be infinitely large, thus being known by the terminal.

[0028] As an example of this utility model, a conductive wire is provided in the center of the bolt body 2, and the two ends of the conductive wire are connected to the connector 1 and the pressure sensor 7 respectively.

[0029] As an example of this utility model, the electrical connector 1 is fixedly disposed on the upper end of the bolt body 2.

[0030] Working principle: During use, as the bolt body 2 is tightened, the top plate 9 is pushed into the mounting groove 11. The top plate 9 then drives the annular plate 5 to disengage from the pressure sensor 7 via the connecting rod 8. When the bolt body 2 loosens, the spring 4 will drive the annular plate 5 to move and thus hold the pressure sensor 7 in place. The pressure sensor 7 will transmit data back to the terminal through the connecting line. When the bolt body 2 breaks, the connection of the pressure sensor 7 will be lost, and the resistance will be infinitely large, thus being detected by the terminal.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An online monitoring device for the tightness of high-strength bolts, comprising a bolt body (2), characterized in that: The bolt body (2) has a mounting groove (11) at its bottom, and a monitoring mechanism (10) is provided inside the mounting groove (11). The monitoring mechanism (10) includes: A fixing block (3) is fixedly provided with an intermediate rod (6) at the lower end of the fixing block (3), and a pressure sensor (7) is fixedly provided at one end of the intermediate rod (6); An annular plate (5) is sleeved on the surface of the intermediate rod (6), and the lower end of the intermediate rod (6) is fixed to the top plate (9) by several connecting rods (8); The bottom of the mounting groove (11) is provided with a spring (4), and the upper end of the spring (4) is fixedly connected to the annular plate (5).

2. The online monitoring device for high-strength bolt tightness according to claim 1, characterized in that: The bolt body (2) has a conductive wire at its center, and the two ends of the conductive wire are connected to the connector (1) and the pressure sensor (7) respectively.

3. The online monitoring device for high-strength bolt tightness according to claim 2, characterized in that: The connector (1) is fixedly mounted on the upper end of the bolt body (2).

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