Hydraulic stretcher calibration device

Abstract

The present application provides hydraulic stretcher calibration device, including stretcher and puller, the inside of the stretcher is provided with second support plate, the inside of the stretchner is provided with first support plate above second support plate, the puller is arranged above first support plate, the bottom of the stretcher is provided with bottom disc, the inside center of the first support plate is provided with force sensor.The present application, by setting force sensor, by tool through first tool sleeve hole, puller is locked on the surface of force sensor, force sensor is respectively attached to first support plate and second support plate and detects the relative extrusion force of first support plate and second support plate, the calibration device further includes connecting hose electrically connected with data acquisition interface and data acquisition display instrument electrically connected with connecting hose, can be monitored in real time, the device structure is simple and convenient to carry to the work site and carries out calibration, and the calibration data is stable.

Description

Technical Field

[0001] This invention relates to the field of mechanical metrology and testing technology, and in particular to a calibration device for hydraulic tensioners. Background Technology

[0002] A hydraulic bolt tensioner, or simply a hydraulic tensioner, is a tool for tightening and loosening bolts. It is widely applicable in industries such as metallurgy, mining, petrochemicals, shipbuilding, power systems, locomotives, and heavy machinery. Utilizing hydraulic power provided by an ultra-high-pressure pump, it stretches the bolt within its elastic deformation zone, taking advantage of the material's allowable elastic range, to achieve the purpose of tightening or loosening the bolt. It can also be used as a device to apply axial force to hydraulic interference fits for pressure installation. Especially in heavily polluted or space-constrained working environments, hydraulic tensioning devices are irreplaceable by any other tool, making them ideal process equipment for assembling large and medium-sized machinery and maintaining equipment. This significantly improves construction efficiency.

[0003] Current calibration devices measure directly using tensile force sensors. This design involves numerous connectors and significant deformation under stress, making it susceptible to factors such as off-center loading during measurement. Consequently, the measurement accuracy is low, making it difficult to evaluate internal leakage indicators and hindering portable measurement. Furthermore, most hydraulic tensioner calibration devices are bulky and not portable. Therefore, we propose a hydraulic tensioner calibration device. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a hydraulic tensioner calibration device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic tensioner calibration device, comprising a tensioner and a puller, wherein a second support plate is provided inside the tensioner, a first support plate is provided above the second support plate inside the tensioner, the puller is provided above the first support plate, a chassis is provided at the bottom of the tensioner, and a force sensor is provided at the center of the interior of the first support plate.

[0006] Preferably, the surfaces of the first support plate and the second support plate are provided with threaded holes arranged in a circumferential array and are fixedly connected by a threaded adapter, and the force sensor abuts against the second support plate.

[0007] Preferably, a slot is provided on one side of the tensioner, a hose connector is provided on one side of the force sensor that passes through the first support plate, a connecting hose is provided at the end of the hose connector away from the force sensor, and a display instrument is provided at the end of the connecting hose away from the hose connector.

[0008] Preferably, the puller and the chassis are respectively provided with a first tool sleeve hole and a second tool sleeve hole that are equally distributed on their sides, the chassis has a threaded sleeve hole at the center of its surface, and the puller has a threaded connection port on one side.

[0009] Preferably, the groove is adapted to and engaged with the hose connector.

[0010] Preferably, the puller is located on the force sensor and is locked relative to it.

[0011] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0012] In this invention, a force sensor is used. A tool passes through the hole in the first tool sleeve to lock the puller onto the surface of the force sensor. The force sensor is in close contact with the first and second support plates and detects the relative pressing force between the first and second support plates. The calibration device also includes a connecting hose electrically connected to the data acquisition interface and a data acquisition and display instrument electrically connected to the connecting hose. This allows for real-time monitoring and high measurement accuracy. Currently, most existing hydraulic tensioner calibration devices suffer from low measurement accuracy and large size, making them impractical for portability. This device has a simple structure, is easy to carry to the work site for calibration, and provides stable calibration data. To better understand the above-mentioned objectives, features, and advantages of this invention, the invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0013] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0014] Examples, such as Figure 1-4 As shown, the present invention provides a hydraulic tensioner calibration device, including a tensioner 1 and a puller 2.

[0015] The specific settings and functions of the force sensor 16 will be discussed below.

[0016] like Figure 1 and Figure 2 As shown, a second support plate 14 is provided inside the tensioner 1, a first support plate 10 is provided inside the tensioner 1 above the second support plate 14, the puller 2 is provided above the first support plate 10, a base plate 3 is provided at the bottom of the tensioner 1, and a force sensor 16 is provided at the center of the inside of the first support plate 10.

[0017] The surfaces of the first support plate 10 and the second support plate 14 are provided with threaded holes 9 arranged in a circumferential array and are fixedly connected by threaded adapters 8. The force sensor 16 abuts against the second support plate 14. A slot 15 is opened on one side of the tensioner 1. A hose connector 4 is provided on one side of the force sensor 16 that passes through the first support plate 10. A connecting hose 5 is provided at the end of the hose connector 4 away from the force sensor 16. A display instrument 6 is provided at the end of the connecting hose 5 away from the hose connector 4. The sides of the puller 2 and the chassis 3 are respectively provided with first tool sleeve holes 7 and second tool sleeve holes 12 that are evenly distributed to facilitate the use of tools to lock them.

[0018] A threaded sleeve hole 11 is provided at the center of the surface of the chassis 3. A threaded connection port 13 is provided on one side of the puller 2. The groove 15 is adapted to and engaged with the hose connector 4. The puller 2 is located on the force sensor 16 and is locked relative to it.

[0019] The overall effect of the force sensor 16 is that, by setting the force sensor 16, the puller 2 is locked to the surface of the force sensor 16 by passing the tool through the first tool sleeve hole 7. The force sensor 16 is closely attached to the first support plate 10 and the second support plate 14 respectively and detects the relative pressing force of the first support plate 10 and the second support plate 14. The calibration device also includes a connecting hose 5 electrically connected to the data acquisition interface and a data acquisition display instrument 6 electrically connected to the connecting hose 5. It can monitor in real time, has high measurement accuracy, and the device has a simple structure, is easy to carry to the work site for calibration, and the calibration data is stable.

[0020] The overall working principle of this invention is as follows: This invention is a hydraulic tensioner calibration device. The tensioner 1 is sleeved on the bolt to be tested. By setting a force sensor 16, the puller 2 is locked to the surface of the force sensor 16 by passing a tool through the first tool sleeve hole 7. The force sensor 16 is closely attached to the first support plate 10 and the second support plate 14 respectively and detects the relative pressing force between the first support plate 10 and the second support plate 14. The calibration device also includes a connecting hose 5 electrically connected to the data acquisition interface and a data acquisition and display instrument 6 electrically connected to the connecting hose 5. It can monitor in real time, has high measurement accuracy, and the device has a simple structure, is easy to carry to the work site for calibration, and the calibration data is stable.

[0021] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention. Attached Figure Description

[0022] Figure 1 This invention presents a three-dimensional structural schematic diagram of a hydraulic tensioner calibration device.

[0023] Figure 2 This invention provides a three-dimensional structural diagram of the hydraulic tensioner calibration device.

[0024] Figure 3 A three-dimensional structural diagram of the puller of the hydraulic tensioner calibration device proposed in this invention;

[0025] Figure 4 This invention provides a three-dimensional structural diagram of the tensioner of the hydraulic tensioner calibration device.

[0026] Legend: 1. Tensioner; 2. Puller; 3. Chassis; 4. Hose connector; 5. Connecting hose; 6. Display instrument; 7. First tool sleeve hole; 8. Threaded adapter; 9. Threaded hole; 10. First support plate; 11. Threaded sleeve hole; 12. Second tool sleeve hole; 13. Threaded connection port; 14. Second support plate; 15. Groove; 16. Force sensor.

Claims

1. Hydraulic stretcher calibration apparatus comprising a stretcher and a puller, characterized in that: The tensioner has a second support plate inside, and a first support plate is located above the second support plate inside the tensioner. The puller is located above the first support plate, and a base is located at the bottom of the tensioner. A force sensor is located at the center of the first support plate. The surfaces of the first and second support plates are provided with threaded holes arranged in a circumferential array and are fixedly connected by a threaded adapter. The force sensor abuts against the second support plate.

2. The hydraulic stretcher calibrator apparatus of claim 1, wherein: The tensioner has a slot on one side, and the force sensor has a hose connector on one side that passes through the first support plate. A connecting hose is provided at the end of the hose connector away from the force sensor, and a display instrument is provided at the end of the connecting hose away from the hose connector.

3. The hydraulic stretcher calibrator of claim 1, wherein: The puller and the chassis are respectively provided with a first tool sleeve hole and a second tool sleeve hole that are equally distributed on their sides. A threaded sleeve hole is provided at the center of the surface of the chassis. A threaded connection port is provided on one side of the puller.

4. The hydraulic tensioner calibration device according to claim 2, characterized in that: The groove is adapted to and snaps into place with the hose connector.

5. The hydraulic stretcher calibrator of claim 1, wherein: The puller is located on the force sensor and is locked relative to it.

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