A self-monitoring bolt

Abstract

The present invention discloses a self-monitoring bolt, and a detection hole is formed in the self-monitoring bolt, and a sensor is embedded in the detection hole. Compared with the prior art, the self-monitoring bolt of the present invention can automatically monitor core parameters such as stress, strain, and temperature at a local position during the service operation of the equipment. Based on these self-monitoring data, the strength, stiffness, and temperature rise indexes of the equipment during the service operation can be evaluated. Before the arrival of the major inspection period or the minor inspection period, the maintenance parts can be determined according to the self-monitoring data of the bolt, which can avoid the blindness of maintenance and improve the maintenance efficiency. Secondly, by collecting the self-monitoring data of the bolt, the operation conditions of the local position can be predicted in advance, and corresponding measures can be taken for the dangerous positions of the equipment to avoid the failure of the entire equipment.

Description

Technical Field

[0001] The present invention relates to bolts, and particularly to a self-monitoring bolt. Background Art

[0002] In special equipment for oil pipelines (such as heat exchangers and compressors) and single equipment in aerospace (such as missile-borne mission machines and fire control boxes), the equipment has strict requirements for strength, stiffness and temperature rise. Therefore, such equipment usually requires major inspection cycles and minor inspection cycles. Whether it is a major overhaul cycle or a minor overhaul cycle, the equipment needs to be disassembled for various experimental tests to determine the service operation status of the equipment, especially to detect the strength, stiffness and temperature rise of local positions, then evaluate the comprehensive performance of the equipment, and then determine the replacement of parts, maintenance and assembly according to the evaluation results, and finally debug and run the equipment. The whole detection process has certain blindness and time-consuming, low efficiency, and has a certain impact on the performance of fasteners during repeated disassembly and assembly. In view of this, the inventor of the present invention has conducted in-depth research and obtained a self-monitoring bolt. Summary of the Invention

[0003] The purpose of the present invention is to provide a self-monitoring bolt, which can automatically monitor core parameters such as stress, strain and temperature of local positions of equipment, thereby avoiding the blindness of maintenance and improving the maintenance efficiency.

[0004] The above technical purpose of the present invention is achieved through the following technical solutions:

[0005] A self-monitoring bolt is provided with a detection hole, and a sensor is embedded in the detection hole.

[0006] Further improvement: The sensor includes at least one or several of a photothermal temperature controller, a pressure sensor and a strain sensor.

[0007] Further improvement: The sensor is connected with an external wire, and the surface of the self-monitoring bolt has a groove for routing the external wire.

[0008] Further improvement: The self-monitoring bolt includes a bolt head and a shank connected to each other, and the detection holes are respectively provided on the bolt head and the shank.

[0009] Further improvement: The lower surface of the bolt head is provided with the detection hole.

[0010] Further improvement: The detection hole provided on the lower surface of the screw head includes a first detection hole and a second detection hole. A pressure sensor is embedded in the first detection hole, and a strain sensor is embedded in the second detection hole.

[0011] Further improvement: The side part of the shank is provided with the detection hole.

[0012] Further improvement: A photothermal and temperature controller is embedded in the detection hole provided on the side of the polished rod.

[0013] Further improvement: The detection holes provided on the side of the polished rod include a third detection hole and a fourth detection hole, and the photothermal sensors are respectively embedded in the third detection hole and the fourth detection hole.

[0014] Further improvement: The third detection hole and the fourth detection hole are respectively provided on opposite surfaces of the polished rod and are staggered in height positions.

[0015] Compared with the prior art, by using a self-monitoring bolt of the present invention, core parameters such as stress, strain, and temperature at local positions during the service operation of the equipment can be automatically monitored. Based on these self-monitoring data, the strength, stiffness, and temperature rise indexes of the equipment during the service operation can be evaluated. Before the arrival of the major inspection period or the minor inspection period, the inspection parts can be determined according to the self-monitoring data of the bolt, which can avoid the blindness of the inspection and improve the inspection efficiency. Secondly, by collecting the self-monitoring data of the bolt, the operation conditions at local positions can be predicted in advance, and corresponding measures can be taken for the dangerous positions of the equipment to avoid the failure of the entire equipment. Brief Description of the Drawings

[0016] Figure 1 is a schematic structural view of one side of a self-monitoring bolt according to the present invention.

[0017] Figure 2 is a schematic structural view of another side of a self-monitoring bolt according to the present invention

[0018] Figure 3 is a top view of a self-monitoring bolt according to the present invention.

[0019] Figure 4 is a schematic structural view of the bottom box of a self-monitoring bolt according to the present invention.

[0020] In the figure

[0021] bolt head - 1; first detection hole - 11; second detection hole - 12;

[0022] polished rod - 2; third detection hole - 21; fourth detection hole - 22;

[0023] box body - 31; large spring - 32; small spring - 33. Detailed Description of the Embodiment

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] This specific embodiment is only an interpretation of the present invention and not a limitation thereof. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

[0026] As Figure 1 , Figure 2 shown, a self - monitoring bolt, a detection hole is provided on the self - monitoring bolt, and a sensor is embedded in the detection hole. The sensor here includes at least one or several of a photothermal - sensitive temperature controller, a pressure sensor, and a strain sensor. Each sensor needs to correspond to a detection hole, and the sensor is inserted into the detection hole to complete its embedding process.

[0027] The self - monitoring bolt of this embodiment is applied to fastening connectors of special equipment for oil pipelines and single - unit equipment in aerospace, and can timely monitor the stress, strain, and temperature rise conditions of the equipment during operation.

[0028] It should be noted that: the photothermal - sensitive temperature controller, the pressure sensor, and the strain sensor are all existing devices and can be obtained through market procurement.

[0029] Furthermore, the sensor is connected with an external wire for real - time acquisition of the detection data of the sensor. For the convenience of wiring, the surface of the self - monitoring bolt has a groove for the external wire to be routed. The external wire passes through the groove. Of course, since the diameter of the external wire is small, even without setting the groove, it will not have a great impact on the normal use of the bolt.

[0030] Furthermore, the self - monitoring bolt includes a bolt head 1 and a smooth shank 2 connected to each other, and the detection holes are respectively provided on the bolt head 1 and the smooth shank 2.

[0031] The detection holes provided on the lower surface of the screw head include a first detection hole 11 and a second detection hole 12. Here, the lower surface is the washer surface of the bolt head 1. A pressure sensor is embedded in the first detection hole 11, and a strain sensor is embedded in the second detection hole 12. Setting the pressure sensor and the strain sensor at the washer surface can accurately detect the pressure and stress changes at the bolt.

[0032] The detection holes provided on the side of the smooth shank 2 include a third detection hole 21 and a fourth detection hole 22, and a photothermal - sensitive sensor is respectively embedded in the third detection hole 21 and the fourth detection hole 22. The photothermal - sensitive temperature controller can realize real - time monitoring of the temperature.

[0033] Further, in order to monitor the temperature more comprehensively, the third detection hole 21 and the fourth detection hole 22 are respectively arranged on opposite faces of the polished rod 2 and are staggered in height position, so as to realize the temperature monitoring of different sides and different positions of the polished rod 2, and improve the detection accuracy at the same time.

[0034] By setting the pressure sensor, strain sensor and photothermal temperature controller, the strength, stiffness and temperature rise of the bolt installation can be comprehensively monitored, providing data support for maintenance. On the one hand, this can avoid the blindness of maintenance and improve the maintenance efficiency; on the other hand, by collecting the bolt self-monitoring data, the operation conditions of local positions can be predicted in advance, and corresponding measures can be taken for the dangerous positions of the equipment to avoid the failure of the entire equipment and cause heavy losses to the enterprise.

[0035] As a supplement, in order to facilitate the installation of the pressure sensor and strain sensor, a double-spring assembly bottom box is arranged in the first detection hole 11 and the second detection hole 12, as Figure 3 shown. The double-spring assembly bottom box includes a box body 31, a large spring 32 and a small spring 33. The large spring 32 has a long length and a small elastic coefficient, and the small spring 33 has a short length and a large elastic coefficient. The large spring 32 is sleeved on the small spring 33, and both the large spring 32 and the small spring 33 are fixed in the box body 31. The double-spring assembly bottom box is fixed at the bottom of the detection hole, and can be specifically fixed by setting a buckle. The sensor is fixed on the box body 31. Such a setting can improve the detection accuracy in the normal and axial directions.

[0036] The above description of the embodiments is to facilitate the understanding and use of the present invention by those of ordinary skill in the art. Those who are familiar with the technology in the art can obviously make various modifications to the embodiments easily, and apply the general principles described herein to other embodiments without creative labor. Therefore, the present invention is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A self-monitoring bolt, characterized in that, The self - monitoring bolt is provided with a detection hole, and a sensor is embedded in the detection hole; The self - monitoring bolt includes a bolt head (1) and a shank (2) which are connected to each other, and the detection holes are respectively provided on the bolt head (1) and the shank (2); The side of the shank (2) is provided with the detection hole, and a photothermal - sensitive temperature controller is embedded in the detection hole provided on the side of the shank (2). The detection holes provided on the side of the shank (2) include a third detection hole (21) and a fourth detection hole (22), and the photothermal - sensitive sensors are respectively embedded in the third detection hole (21) and the fourth detection hole (22). The third detection hole (21) and the fourth detection hole (22) are respectively arranged on the opposite surfaces of the shank (2) and are staggered in height position; The lower surface of the bolt head (1) is provided with the detection hole. The detection holes provided on the lower surface of the bolt head include a first detection hole (11) and a second detection hole (12). A pressure sensor is embedded in the first detection hole (11), and a strain sensor is embedded in the second detection hole (12); A double - spring assembly bottom box is arranged in the first detection hole (11) and the second detection hole (12). The double - spring assembly bottom box includes a box body (31), a large spring (32) and a small spring (33). The length of the large spring (32) is greater than that of the small spring (33), the elastic coefficient of the large spring (32) is less than that of the small spring (33), the large spring (32) is sleeved on the small spring (33), and both the large spring (32) and the small spring (33) are fixed in the box body (31). The double - spring assembly bottom box is fixed at the bottom of the detection hole, and the sensor is fixed on the box body (31).

2. The self-monitoring bolt according to claim 1, characterized in that: The sensor includes at least one or several of a photothermal - sensitive temperature controller, a pressure sensor and a strain sensor.

3. The self-monitoring bolt according to claim 1, characterized in that: The sensor is connected with an external wire, and the surface of the self - monitoring bolt has a groove for routing the external wire.

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