Intelligent bolt force value calibration device

Abstract

The utility model discloses an intelligent bolt force value calibration device, comprising a hydraulic oil cylinder which is provided with a hydraulic oil inlet and is also provided with a first end face and a second end face which are oppositely arranged in parallel; the pressure transmitter is arranged on the hydraulic oil cylinder and is used for detecting the pressure of the hydraulic oil in the hydraulic oil cylinder; the liquid conveying end of the hydraulic pneumatic pump is connected with a hydraulic oil inlet of the hydraulic oil cylinder through an oil conveying pipe; the hydraulic stretching head is arranged on the first end surface of the hydraulic oil cylinder and is connected with the output end of the hydraulic oil cylinder; the intelligent bolt mounting cushion block is arranged on the second end face of the hydraulic oil cylinder; and the control unit is respectively connected with the pressure transmitter, the hydraulic pneumatic pump and the sensor of the intelligent bolt. According to the utility model, the force value of the intelligent bolt can be accurately calibrated, the error between the intelligent bolt and the actual force value is reduced, the operation is convenient, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent bolt calibration equipment, in particular to a force value calibration device for intelligent bolts. Background Art

[0002] An intelligent bolt is a new type of fastener. Through built-in sensors and control modules, it can realize real-time monitoring and remote control of the bolt status. Intelligent bolts have been widely used in fields such as aviation, railway, bridge, and wind power generation, and have great advantages in terms of safety, reliability, and efficiency.

[0003] The existing force value calibration method for intelligent bolts calibrates the force value at different torques. Since the torque needs to be converted into force value data, the error is relatively large.

[0004] Therefore, through beneficial exploration and research, the applicant has found a method to solve the above problems. The technical solution to be introduced below is generated under this background. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is: to provide a force value calibration device for intelligent bolts that improves calibration accuracy in view of the deficiencies of the prior art.

[0006] The technical problem to be solved by the utility model can be achieved by adopting the following technical solutions:

[0007] A force value calibration device for intelligent bolts, comprising:

[0008] A hydraulic cylinder, which has a hydraulic oil inlet and also has a first end face and a second end face arranged relatively parallel;

[0009] A pressure transmitter installed on the hydraulic cylinder for detecting the pressure of the hydraulic oil in the hydraulic cylinder;

[0010] A hydraulic pneumatic pump, the liquid delivery end of which is connected to the hydraulic oil inlet of the hydraulic cylinder through an oil pipeline;

[0011] A hydraulic stretching head arranged on the first end face of the hydraulic cylinder and connected to the output end of the hydraulic cylinder;

[0012] An intelligent bolt installation pad arranged on the second end face of the hydraulic cylinder; and

[0013] A control unit, which is respectively connected to the pressure transmitter, the hydraulic pneumatic pump, and the sensor of the intelligent bolt;

[0014] During installation, the head of the intelligent bolt is located on the end face of the intelligent bolt mounting pad away from the hydraulic cylinder, and its screw part passes through the intelligent bolt mounting pad and the hydraulic cylinder and then is fixedly connected to the hydraulic tension head.

[0015] In a preferred embodiment of the present invention, the intelligent bolt mounting pad is composed of several stacked mounting gaskets. A bolt through-hole is provided at the center position of each mounting gasket, and the bolt through-holes of all the mounting gaskets form a bolt through-channel; when the intelligent bolt is installed on the intelligent bolt mounting pad, the screw part of the intelligent bolt passes through the bolt through-channel and then extends to the hydraulic tension head.

[0016] In a preferred embodiment of the present invention, a threaded through-hole is provided in the hydraulic tension head. After the screw part of the intelligent bolt passes through the hydraulic cylinder, its end is connected to the threaded through-hole of the hydraulic tension head.

[0017] In a preferred embodiment of the present invention, the control unit is a PLC controller.

[0018] Due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows: The present invention directly calibrates the intelligent bolt through the pressure transmitter, can accurately calibrate the force value of the intelligent bolt, reduces the error between the intelligent bolt and the actual force value, is convenient for operation, and reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is the front view of the present invention.

[0021] Figure 2 is the top view of the present invention.

[0022] Figure 3 is Figure 1 the A-A sectional view of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below with reference to specific drawings.

[0024] Referring to the attached drawings, shown in the figures is a force value calibration device for an intelligent bolt, including a hydraulic cylinder 100, a pressure transmitter 200, a hydraulic pneumatic pump (not shown in the figures), a hydraulic tension head 300, an intelligent bolt mounting pad 400, and a control unit (not shown in the figures).

[0025] The hydraulic cylinder 100 is integrally in a cylindrical structure, which has a hydraulic oil inlet 110 and also has a first end face 120 and a second end face 130 arranged relatively parallelly.

[0026] The pressure transmitter 200 is installed on the hydraulic cylinder 100 and is used to detect the pressure of the hydraulic oil in the hydraulic cylinder 100.

[0027] The liquid delivery end of the hydraulic pneumatic pump is connected to the hydraulic oil inlet of the hydraulic cylinder 100 through an oil delivery pipe and is used to deliver hydraulic oil into the hydraulic cylinder 100 or extract hydraulic oil from the hydraulic cylinder 100.

[0028] The hydraulic tension head 300 is arranged on the first end face 120 of the hydraulic cylinder 100 and is connected to the output end 140 of the hydraulic cylinder 100. A threaded through hole 310 is provided in the hydraulic tension head 300.

[0029] The intelligent bolt mounting pad 400 is arranged on the second end face 130 of the hydraulic cylinder 100. In this embodiment, the intelligent bolt mounting pad 400 is composed of several stacked mounting gaskets 410. A bolt passing through hole 411 is provided at the center position of each mounting gasket 410, and the bolt passing through holes 411 of all the mounting gaskets 410 form a bolt passing channel. In this way, the intelligent bolt mounting pad 400 can adjust the thickness of the intelligent bolt mounting pad 400 by adjusting the number of mounting gaskets 410, so as to adapt to the installation of intelligent bolts with different lengths.

[0030] The control unit is respectively connected to the pressure transmitter 200, the hydraulic tension head 300, and the sensor 13 of the intelligent bolt 10, and is used to collect the data of each component in real time or control each mechanism or component to perform coordinated actions. In this embodiment, the control unit preferably adopts a PLC controller.

[0031] When the intelligent bolt 10 is installed, the head 11 of the intelligent bolt 10 is located on the end face of the intelligent bolt mounting pad 400 away from the hydraulic cylinder 100. Its screw rod part 12 passes through the bolt passing channel of the intelligent bolt mounting pad 400 and the hydraulic cylinder 100 and then is connected to the threaded through hole 310 of the hydraulic tension head 300. The screw rod part 12 of the intelligent bolt 10 is locked through the threaded through hole 310 of the hydraulic tension head 300. The intelligent bolt mounting pad 400 is located between the intelligent screw 10 and the hydraulic cylinder 100 and plays a supporting role.

[0032] The working principle of the force value calibration device for the intelligent bolt of the present utility model is as follows:

[0033] When the control unit controls the pressure value delivered by the hydraulic pneumatic pump and delivers a certain amount of hydraulic oil into the hydraulic cylinder 100, the hydraulic cylinder 100 is jacked up, thereby pushing the hydraulic tension head 300 to move outward. At this time, the hydraulic tension head 300 pulls the screw part 12 of the intelligent bolt 10, causing the screw part 12 of the intelligent bolt 10 to deform. At this time, the control unit receives the displacement value x collected by the sensor of the intelligent bolt 10 and the force value y converted by the pressure transmitter.

[0034] The calibration calculation method is to use the binary linear equation y = kx + b. By knowing the pre-tightening force of the corresponding intelligent bolt and selecting n points between 0 and the maximum pre-tightening force, n point values (x, y) will be obtained. The k value and b value are calculated using the least squares formula to obtain the linear equation of the force value and displacement value of the intelligent bolt, thereby completing the calibration of the intelligent bolt.

[0035] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A force value calibration device for a smart bolt, characterized in that: include: A hydraulic cylinder, wherein the hydraulic cylinder has a hydraulic oil inlet and a first end surface and a second end surface arranged in parallel with each other; A pressure transmitter installed on the hydraulic cylinder for detecting the pressure of the hydraulic oil in the hydraulic cylinder; A hydraulic pneumatic pump, wherein the infusion end of the hydraulic pneumatic pump is connected to the hydraulic oil inlet of the hydraulic cylinder through an oil delivery pipe; A hydraulic stretching head disposed on a first end surface of the hydraulic cylinder and connected to an output end of the hydraulic cylinder; A smart bolt mounting pad disposed on the second end surface of the hydraulic cylinder; as well as A control unit, the control unit being connected to the pressure transmitter, the hydraulic pneumatic pump and the sensor of the smart bolt respectively; During installation, the head of the smart bolt is located on the end surface of the smart bolt installation pad away from the hydraulic cylinder, and the screw portion thereof passes through the smart bolt installation pad and the hydraulic cylinder and is fixedly connected with the hydraulic tensioning head.

2. The force value calibration device of the smart bolt according to claim 1, characterized in that: The smart bolt mounting pad is composed of a plurality of stacked mounting pads, each mounting pad is provided with a bolt through hole at the center, and the bolt through holes of all mounting pads form a bolt through channel; when the smart bolt is installed on the smart bolt mounting pad, the screw portion of the smart bolt passes through the bolt through channel and extends to the hydraulic stretching head.

3. The force value calibration device of the smart bolt according to claim 1, characterized in that: A threaded through hole is provided in the hydraulic stretching head. After the screw rod of the smart bolt passes through the hydraulic cylinder, the end of the screw rod is connected to the threaded through hole of the hydraulic stretching head.

4. The force value calibration device of the smart bolt according to any one of claims 1 to 3, characterized in that: The control unit is a PLC controller.

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