A high-strength bolt axial force testing device

Abstract

The utility model discloses a high -strength bolt axial force test test device, including the bottom plate, the bottom plate upper end middle part is fixedly arranged with first slide rod, the first slide rod upper end is fixedly arranged with the top plate, one side fixedly arranged with hydraulic cylinder at the top plate lower extreme, the movable sleeve of first slide rod outside surface lower extreme is equipped with the movable plate, fixedly connected between the movable end of hydraulic cylinder and movable plate, the first fixed frame is fixedly arranged with the movable plate outside surface lower extreme, the bottom plate upper end is fixedly arranged with second fixed frame, the bottom plate with top plate between first slide rod one side is fixedly arranged with second slide rod. The utility model is provided with safety protection mechanism, can be in the test bolt automatically with test position cover set up, so can provide safe test environment for whole test environment, and can make the isolating cover lift automatically after the test is completed, thereby can conveniently take the bolt of testing.

Description

Technical Field

[0001] This utility model relates to the field of bolt testing technology, specifically a test device for testing the axial force of high-strength bolts. Background Technology

[0002] High-strength bolts are bolts made of high-strength steel or requiring a large preload. Besides their widespread use in wind power, high-strength bolts are also used for connections in bridges, rails, and high-voltage and ultra-high-voltage equipment. To ensure the safety of these connections, torque and axial force are two extremely important parameters in the use and design of high-strength bolts. This application primarily focuses on the testing of the axial force of bolts.

[0003] Existing testing devices of this kind, such as the Chinese patent application number 202122134989.3, a high-strength bolt axial force testing device, detect the axial force of the bolt by applying tensile force to the bolt in conjunction with a detection sensor. However, the entire device lacks a safety protection mechanism. During testing, there is a possibility that the bolt may suddenly break due to poor quality, and the nut or bolt fragments may fly out under the action of tensile force, which poses a certain safety hazard. Therefore, an improved high-strength bolt axial force testing device is needed to address this problem. Utility Model Content

[0004] The purpose of this invention is to provide a high-strength bolt axial force testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-strength bolt axial force testing device, comprising a base plate, a first sliding rod fixedly disposed at the middle of the upper end of the base plate, a top plate fixedly disposed at the upper end of the first sliding rod, a hydraulic cylinder fixedly disposed on one side of the lower end of the top plate, a movable plate movably sleeved on the lower end of the outer surface of the first sliding rod, the movable end of the hydraulic cylinder being fixedly connected to the movable plate, a first fixed frame fixedly disposed on the lower end of the outer surface of the movable plate, a second fixed frame fixedly disposed at the upper end of the base plate, a second sliding rod fixedly disposed between the base plate and the top plate on one side of the first sliding rod, an isolation mechanism for isolating the testing environment disposed on the outer side of the second sliding rod, the isolation mechanism comprising a slider and an isolation cover, a slider movably sleeved on the outer surface of the second sliding rod, an isolation cover fixedly disposed on the surface of the slider, and the isolation cover being sleeved on the outer surface of the movable plate.

[0006] Preferably, a first rack is fixedly mounted on the upper end of the movable plate, and a gear is movably mounted between the first sliding rods via a rotating shaft. A telescopic rod is fixedly mounted on the upper end of the slider, and a second rack is fixedly mounted on the upper end of the telescopic rod. The first rack, the second rack, and the gear mesh with each other. This device is driven by the first rack, the second rack, and the gear. In this way, when the movable plate moves up to apply tension to the bolt, the slider and the isolation cover move down, which facilitates the contact between the isolation cover and the protrusion, thus isolating the test area and effectively improving the safety during testing. Furthermore, the entire testing process utilizes the linkage between the first rack, the second rack, and the gear. When the movable plate moves up for testing, the isolation cover can be automatically closed. When the movable plate moves down to complete the test, the isolation cover can be automatically moved up to open, which makes it convenient for the staff to retrieve the tested bolt.

[0007] Preferably, a spring is sleeved on the outer side of the telescopic rod; this spring can generate when the slider and the isolation cover move down and squeeze the telescopic rod to retract, so that the isolation cover can fit tightly against the outer surface of the protrusion to achieve a safe isolation effect.

[0008] Preferably, a protrusion is fixedly provided on the surface of the base plate outside the second fixed frame. The protrusion, together with the isolation cover, can form a safe isolation environment when inspecting bolts. The isolation cover of this device is best made of a sturdy metal material.

[0009] Preferably, both the first and second fixed frames have slots on their outer surfaces. These slots allow for easy locking and fixing of the bolts to be tested. When the movable plate moves up, the first and second fixed frames can apply tension to the bolts, thereby enabling the bolt quality to be tested.

[0010] Preferably, the surface of the isolation cover is provided with a viewing window, which allows staff to easily observe the experimental area.

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

[0012] 1. This utility model uses a first rack, a second rack, and a gear for transmission. This allows the slider and the isolation cover to move downwards while the movable plate moves up to apply tension to the bolt. This facilitates the fitting of the isolation cover and the protrusion, thus isolating the test area and effectively improving the safety of the test.

[0013] 2. The entire testing process of this utility model utilizes the linkage between the first rack, the second rack, and the gear. When the movable plate moves up for testing, the isolation cover can be automatically closed. When the movable plate moves down to complete the test, the isolation cover can be automatically moved up to open, which makes it convenient for staff to take the tested bolts. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a high-strength bolt axial force testing device according to the present invention;

[0015] Figure 2 This is a cross-sectional view of a high-strength bolt axial force testing device according to the present invention;

[0016] Figure 3 This utility model relates to a test device for testing the axial force of high-strength bolts. Figure 2 A magnified view of point A in the middle.

[0017] In the diagram: 1. Base plate; 2. First slide rod; 3. Top plate; 4. Hydraulic cylinder; 5. Movable plate; 6. First fixed frame; 7. Second fixed frame; 8. Second slide rod; 9. Slider; 10. Isolation cover; 11. First rack; 12. Gear; 13. Telescopic rod; 14. Second rack; 15. Protrusion; 16. Viewing window; 17. 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] Please see Figure 1-3 This utility model provides a technical solution: a high-strength bolt axial force testing device, including a base plate 1, a first slide rod 2 fixedly installed at the middle of the upper end of the base plate 1, a top plate 3 fixedly installed at the upper end of the first slide rod 2, a hydraulic cylinder 4 fixedly installed on one side of the lower end of the top plate 3, a movable plate 5 movably sleeved on the lower end of the outer surface of the first slide rod 2, the movable end of the hydraulic cylinder 4 being fixedly connected to the movable plate 5, a first fixed frame 6 fixedly installed on the lower end of the outer surface of the movable plate 5, a second fixed frame 7 fixedly installed at the upper end of the base plate 1, a second slide rod 8 fixedly installed between the base plate 1 and the top plate 3 on one side of the first slide rod 2, an isolation mechanism for isolating the test environment provided on the outer side of the second slide rod 8, the isolation mechanism including a slider 9 and an isolation cover 10, the slider 9 movably sleeved on the outer surface of the second slide rod 8, the isolation cover 10 fixedly installed on the surface of the slider 9, and the isolation cover 10 sleeved on the outer surface of the movable plate 5.

[0020] A first rack 11 is fixedly installed on the upper end of the movable plate 5. A gear 12 is movably installed between the first sliding rods 2 via a rotating shaft. A telescopic rod 13 is fixedly installed on the upper end of the slider 9. A second rack 14 is fixedly installed on the upper end of the telescopic rod 13. The first rack 11, the second rack 14 and the gear 12 mesh with each other. This device is driven by the first rack 11, the second rack 14 and the gear 12. In this way, when the movable plate 5 moves upward to apply tension to the bolt, the slider 9 and the isolation cover 10 move downward, so that the isolation cover 10 and the protrusion 15 can be easily attached. This can isolate the test area and effectively improve the safety during testing. In addition, the entire test process is linked by the first rack 11, the second rack 14 and the gear 12. When the movable plate 5 moves upward for testing, the isolation cover 10 can be automatically closed. When the movable plate 5 moves downward to complete the test, the isolation cover 10 can be automatically moved upward to open, which can facilitate the staff to take the tested bolt.

[0021] A spring is sleeved on the outside of the telescopic rod 13; this spring can generate a spring when the slider 9 and the isolation cover 10 move down and squeeze the telescopic rod 13 to retract, so that the isolation cover 10 can be tightly attached to the outer surface of the protrusion 15 to achieve a safe isolation effect.

[0022] A protrusion 15 is fixedly provided on the surface of the base plate 1 outside the second fixed frame 7. The protrusion 15, together with the isolation cover 10, can form a safe isolation environment when inspecting bolts. The isolation cover 10 of this device is preferably made of a sturdy metal material.

[0023] The outer surfaces of the first fixed frame 6 and the second fixed frame 7 are provided with slots 17. The bolts to be tested can be easily locked and fixed through the slots 17. When the movable plate 5 moves upward, the first fixed frame 6 and the second fixed frame 7 can apply tension to the bolts, thereby enabling the bolt quality to be detected.

[0024] The isolation cover 10 has a viewing window 16 on its surface, which allows staff to easily observe the experimental area.

[0025] Working principle: When using this device, the bolt to be tested is placed into the slot 17 of the first fixed frame 6 and the second fixed frame 7. Then, the hydraulic cylinder 4 is contracted to drive the movable plate 5 and the first fixed frame 6 to move upward, so that the first fixed frame 6 and the second fixed frame 7 pull the bolt together, thereby testing the bolt strength.

[0026] When the movable plate 5 and the first fixed frame 6 move upwards, the device is driven by the first rack 11, the second rack 14, and the gear 12. This allows the slider 9 and the isolation cover 10 to move downwards as the movable plate 5 moves upwards and applies tension to the bolts. This facilitates the contact between the isolation cover 10 and the protrusion 15, effectively isolating the test area and improving safety during testing. Figure 3 As shown, the test bolt and the slot 17 are not fitted together, which allows the movable plate 5 to move upwards, and thus allows the isolation cover 10 to move downwards.

[0027] Furthermore, the entire testing process utilizes the linkage between the first rack 11, the second rack 14, and the gear 12. When the movable plate 5 moves upward for testing, it can automatically close the isolation cover 10. When the movable plate 5 moves downward to complete the test, it can automatically move upward to open the isolation cover 10, which makes it convenient for staff to take the tested bolts.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 process, method, article, or apparatus.

[0029] 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. A test device for testing the axial force of high-strength bolts, comprising a base plate (1), characterized in that: A first slide rod (2) is fixedly installed at the middle of the upper end of the base plate (1). A top plate (3) is fixedly installed at the upper end of the first slide rod (2). A hydraulic cylinder (4) is fixedly installed on one side of the lower end of the top plate (3). A movable plate (5) is movably sleeved on the lower end of the outer surface of the first slide rod (2). The movable end of the hydraulic cylinder (4) is fixedly connected to the movable plate (5). A first fixed frame (6) is fixedly installed on the lower end of the outer surface of the movable plate (5). A second fixed frame (7) is fixedly installed at the upper end of the base plate (1). A second slide rod (8) is fixedly installed between the base plate (1) and the top plate (3) on one side of the first slide rod (2). An isolation mechanism for isolating the test environment is provided on the outer side of the second slide rod (8). The isolation mechanism includes a slider (9) and an isolation cover (10). A slider (9) is movably sleeved on the outer surface of the second slide rod (8). An isolation cover (10) is fixedly installed on the surface of the slider (9). The isolation cover (10) is sleeved on the outer surface of the movable plate (5).

2. The high-strength bolt axial force testing device according to claim 1, characterized in that: The upper end of the movable plate (5) is fixedly provided with a first rack (11), and the first slide rod (2) is movably provided with a gear (12) through a rotating shaft. The upper end of the slider (9) is fixedly provided with a telescopic rod (13), and the upper end of the telescopic rod (13) is fixedly provided with a second rack (14). The first rack (11), the second rack (14) and the gear (12) mesh with each other.

3. The high-strength bolt axial force testing device according to claim 2, characterized in that: A spring is fitted on the outside of the telescopic rod (13).

4. The high-strength bolt axial force testing device according to claim 1, characterized in that: The base plate (1) has a protrusion (15) fixedly installed on the outside of the second fixed frame (7).

5. The high-strength bolt axial force testing device according to claim 1, characterized in that: The outer surfaces of the first fixed frame (6) and the second fixed frame (7) are provided with slots (17).

6. The high-strength bolt axial force testing device according to claim 1, characterized in that: The surface of the isolation cover (10) is provided with a viewing window (16).

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