Expansion bolt pull-out test device

Abstract

An expansion bolt pull-out test device belongs to the technical field of bolt piece quality detection and comprises a door-shaped frame, a base, a sliding block and an electric control telescopic mechanism, the bottom end of the door-shaped frame is fixedly connected with the upper end of the base, the sliding block is slidably connected to the inner side of the door-shaped frame, a limiting groove is formed in the top of the sliding block, and the fixed end of the electric control telescopic mechanism is clamped with the limiting groove. The telescopic end extends upwards in the direction perpendicular to the base, the top end of the door-shaped frame is parallel to the top end of the base, a plurality of through holes are evenly distributed in the top end of the door-shaped frame in the front-back direction, the through holes are matched with bolt bodies of expansion bolts to be detected in outer diameter, and the through holes correspond to the expansion bolts of different models respectively. The telescopic end of the electric control telescopic mechanism is coaxially opposite to the through hole, and the electric control telescopic mechanism is connected with a drawing force detection mechanism. The device can accurately detect the strength of the expansion sleeve of the expansion bolt so as to verify the pull-out resistance of the expansion bolt, is simple in structure and convenient to use, and can also be applied to pull-out tests of expansion bolts of various models.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bolt quality detection technical field, concretely relates to a kind of expansion bolt pull-out test device. BACKGROUND

[0002] Expansion bolts are widely used in the fields of construction, bridges, tunnels and the like for fixing and connecting, particularly in substrates such as concrete, stone and brick walls, for fixing supports, steel structural members, pipelines and equipment and the like. However, if an expansion bolt comes off, it will have a significant impact, and therefore, before installation and use, the expansion bolt needs to be subjected to a pull-out test to verify its fixing strength and pull-out resistance. There is still a lack of a device capable of performing a pull-out test on different types of expansion bolts in the prior art, and most expansion bolt pull-out testers are used to detect the pull-out resistance of expansion bolts fixed in concrete, and there is also a lack of pull-out detection devices for the strength of the expansion sleeve of an expansion bolt. Since the former can detect the strength of the expansion bolt to some extent, but there is a problem of loosening of the expansion bolt under a small force due to insufficient concrete strength, such detection instruments cannot be used to detect the strength of the expansion sleeve. SUMMARY

[0003] The utility model discloses an expansion bolt pull-out test device, which can accurately detect the strength of the expansion sleeve of the expansion bolt, thereby verifying the pull-out resistance of the expansion bolt. The utility model has a simple structure, is easy to use, and can be applied to the pull-out test of various types of expansion bolts.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] An expansion bolt pull-out test device, comprising a portal frame, a base, a sliding block, and an electric control telescopic mechanism, wherein the bottom end of the portal frame is fixedly connected to the upper end of the base, the sliding block is slidably connected to the inner side of the portal frame, a limiting groove is arranged on the top of the sliding block, the fixed end of the electric control telescopic mechanism is clamped to the limiting groove, and the telescopic end extends upward in a direction perpendicular to the base; the top end of the portal frame is parallel to the top end of the base, a plurality of through holes are uniformly distributed on the top end of the portal frame in the front-rear direction, the through holes are matched with the outer diameter of the bolt body of the expansion bolt to be detected, and the plurality of through holes correspond to different types of expansion bolts respectively; the telescopic end of the electric control telescopic mechanism is coaxially opposite to the through hole; and the electric control telescopic mechanism is connected to a pull-out force detection mechanism.

[0006] Preferably, the electric control telescopic mechanism is a hydraulic cylinder, an air cylinder or an electric cylinder, a controller is fixedly arranged on the outer surface of the portal frame, the controller is electrically connected to a power supply and is configured to control the electric control telescopic mechanism.

[0007] Preferably, the pulling force detection mechanism comprises a pressure sensor, the top of the telescopic end is connected with a pushing block, and the pressure sensor is electrically connected with the controller through wires.

[0008] Preferably, the side wall surface of the door-shaped frame is provided with a display and a control panel, and the controller is electrically connected with the display and the control panel through wires respectively.

[0009] Preferably, the sliding block is in a cubic structure, and the bottom and the side wall of the sliding block are slidably connected with the upper surface of the base and the inner wall surface of the door-shaped frame respectively.

[0010] Preferably, the two side walls of the sliding block are respectively provided with two bolt holes, the side walls of the door-shaped frame are uniformly provided with a plurality of positioning holes matched with the bolt holes, and the sliding block is fixedly connected with the door-shaped frame through positioning bolts penetrating through the positioning holes and being screwed with the bolt holes.

[0011] Preferably, the middle part of the two side wall surfaces of the door-shaped frame is provided with a rotating shaft, and the two rotating shafts are jointly rotatably connected with a U-shaped handle.

[0012] Preferably, the top end of the door-shaped frame is further provided with a plurality of bubble levels.

[0013] Preferably, the female corner at the top of the door-shaped frame is further fixedly connected with a diagonal plate.

[0014] Preferably, the two side walls at the rear end of the door-shaped frame are respectively provided with limiting blocks.

[0015] The expansion bolt pulling test device has the advantages that:

[0016] The device can accurately detect the strength of the expansion sleeve of the expansion bolt, thereby verifying the pull-out resistance of the expansion bolt, and has the advantages of simple structure, convenient use and wide application in pulling test of various types of expansion bolts. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 : the front view structural schematic diagram (partially sectioned).

[0018] Figure 2 : the side view structural schematic diagram.

[0019] Figure 3 : the top view structural schematic diagram.

[0020] 1, door type frame; 2, sliding block; 3, electric control telescopic mechanism; 4, pressure sensor; 5, bolt body of expansion bolt; 6, expansion sleeve; 7, conical head at bottom of bolt body; 8, rotating shaft; 9, U-shaped handle; 10, nut; 11, gasket; 12, positioning bolt; 13, base; 14, controller; 15, display; 16, control panel; 17, limiting block; 18, positioning hole; 19, through hole; 20, bubble level. DETAILED DESCRIPTION

[0021] The following description is only a preferred embodiment of the present application, and is not intended to limit the scope of protection of the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

[0022] The following embodiments can be understood as a part of the structure or method of the present application, or as a combination of the embodiments to explain the structure or method of the present application.

[0023] An expansion bolt pull-out test device, as shown in Figures 1-3 , comprises a door type frame 1, a base 13, a sliding block 2 and an electric control telescopic mechanism 3. The bottom end of the door type frame 1 is fixedly connected to the upper end of the base 13. The sliding block 2 is slidably connected to the inner side of the door type frame 1. The top of the sliding block 2 is provided with a limiting groove (not marked in the figure). The fixed end of the electric control telescopic mechanism 3 is clamped with the limiting groove. The telescopic end extends upward in a direction perpendicular to the base 13. The top end of the door type frame 1 is parallel to the top end of the base 13. The top end of the door type frame 1 is uniformly distributed with a plurality of through holes 19 in the front and back directions. The through holes 19 match the outer diameter of the bolt body 5 of the expansion bolt to be detected. The plurality of through holes 19 correspond to different types of expansion bolts respectively. The telescopic end of the electric control telescopic mechanism 3 is coaxially opposite to the through hole 19. The electric control telescopic mechanism 3 is connected with a pull-out force detection mechanism.

[0024] Further, as shown in Figures 1-3 , the electric control telescopic mechanism 3 is a hydraulic cylinder or a pneumatic cylinder or an electric cylinder. The outer surface of the door type frame 1 is fixedly provided with a controller 14. The controller 14 is electrically connected with a power supply and is configured to control the electric control telescopic mechanism 3.

[0025] Further, as shown in Figures 1-3 , the pull-out force detection mechanism comprises a pressure sensor 4. The top of the telescopic end is connected with a pushing block (not marked in the figure, as shown in Figure 1 ) through the pressure sensor 4. The pressure sensor 4 is electrically connected with the controller 14 through a wire.

[0026] Further, as shown in Figures 1-3As shown, the side wall surface of the door-shaped frame 1 is provided with a display 15 and a control panel 16, and the controller 14 is electrically connected with the display 15 and the control panel 16 through wires respectively.

[0027] Further, as shown in the figure, Figures 1-3 the slider 2 is of a cubic structure, and the bottom and the side wall of the slider 2 are slidably connected with the upper surface of the base 13 and the inner wall surface of the door-shaped frame 1 respectively, so that the relative position stability of the slider and the door-shaped frame is ensured, and the movement of the slider is facilitated.

[0028] Further, as shown in the figure, Figures 1-3 the two side walls of the slider 2 are respectively provided with two bolt holes (not shown in the figure), and the side walls of the door-shaped frame 1 are uniformly distributed with a plurality of positioning holes 18 matched with the bolt holes, and the slider 2 is fixedly connected with the door-shaped frame 1 through positioning bolts 12 penetrating the positioning holes 18 and being screwed with the bolt holes, and when the positioning bolts are matched with different positioning holes, the slider is located at different positions, so that different types of expansion bolts can be detected.

[0029] Further, as shown in the figure, Figures 1-3 the middle part of the two side wall surfaces of the door-shaped frame 1 is provided with a rotating shaft 8, and the two rotating shafts 8 are jointly rotatably connected with a U-shaped handle 9, so as to facilitate the movement of the device.

[0030] Further, as shown in the figure, Figures 1-3 the top end of the door-shaped frame 1 is also distributed with a plurality of bubble levels 20, which are used to detect whether the top of the door-shaped frame is deformed, and if the deformation occurs, the bolt body will not be perpendicular, and then the data of the pull-out test will be inaccurate.

[0031] Further, as shown in the figure, Figures 1-3 the female corner at the top of the door-shaped frame 1 is also fixedly connected with a diagonal plate (not labeled in the figure, as shown in the figure), Figure 1 so as to enhance the structural strength of the door-shaped frame and avoid deformation; the two side walls of the rear end of the door-shaped frame are respectively provided with limiting blocks 17, which should be overlapped with the U-shaped handle.

[0032] The use principle of the new type is as follows:

[0033] First, according to the type of expansion bolt, the bolt body is passed through the corresponding through hole and the gasket is sleeved, and the nut is locked, at this time, the top end of the expansion sleeve abuts against the lower surface of the top end of the portal frame, and due to the guiding effect of the through hole, the bolt body remains vertical. By moving the slider, the electric control telescopic mechanism 3 is moved to the working position, and due to the limiting effect of the limiting groove and the positioning hole, the telescopic end is coaxial with the expansion bolt at this time, after the slider is fixed by the positioning bolt, the controller is started by the control panel, the electric control telescopic mechanism 3 is elongated, the pressure displayed on the display screen gradually increases, and then suddenly decreases after reaching a certain peak value, which means that the peak value is the pullout strength of the expansion sleeve, and the controller records the pullout strength data. The sudden decrease in pressure is due to the yielding of the expansion sleeve. In daily maintenance, the base can be leveled, and whether the bubble of the bubble level is centered is observed, and the deformation degree of the top plate of the portal frame is detected, so as to monitor the quality of the device itself.

Claims

1. A pull-out test device for expansion bolts, characterized in that: The device includes a portal frame, a base, a slider, and an electrically controlled telescopic mechanism. The bottom end of the portal frame is fixedly connected to the top end of the base. A slider is slidably connected to the inner side of the portal frame, and a limiting groove is provided on the top of the slider. The fixed end of the electrically controlled telescopic mechanism is engaged with the limiting groove, and the telescopic end extends upward in a direction perpendicular to the base. The top end of the portal frame is parallel to the top end of the base. Several through holes are evenly distributed along the front-back direction on the top end of the portal frame. The through holes match the outer diameter of the expansion bolt to be tested, and the several through holes correspond to different types of expansion bolts. The telescopic end of the electrically controlled telescopic mechanism is coaxial with the through holes, and the electrically controlled telescopic mechanism is connected to a pull-out force detection mechanism.

2. The expansion bolt pull-out test device as described in claim 1, characterized in that: The electrically controlled telescopic mechanism is a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. A controller is fixedly installed on the outer surface of the gantry frame. The controller is electrically connected to a power source and is configured to control the electrically controlled telescopic mechanism.

3. The expansion bolt pull-out test device as described in claim 2, characterized in that: The pull-out force detection mechanism includes a pressure sensor, and a push block is connected to the top of the telescopic end through the pressure sensor. The pressure sensor is electrically connected to the controller through a wire.

4. The expansion bolt pull-out test device as described in claim 3, characterized in that: The side wall surface of the gantry frame is equipped with a display and a control panel, and the controller is electrically connected to the display and the control panel via wires.

5. The expansion bolt pull-out test device as described in claim 4, characterized in that: The slider has a cubic structure, and its bottom and sidewalls are slidably connected to the upper surface of the base and the inner wall surface of the portal frame, respectively.

6. The expansion bolt pull-out test device as described in claim 5, characterized in that: The slider has two bolt holes on each of its two side walls. The side walls of the portal frame have several positioning holes that mate with the bolt holes. The slider is fixedly connected to the portal frame by positioning bolts that pass through the positioning holes and are screwed into the bolt holes.

7. The expansion bolt pull-out test device as described in claim 6, characterized in that: The portal frame has a pivot at the center of the two side wall surfaces, and the two pivots are connected to a U-shaped handle for rotation.

8. The expansion bolt pull-out test device as described in claim 7, characterized in that: The top of the gantry frame is also equipped with multiple bubble levels.

9. The expansion bolt pull-out test device as described in claim 8, characterized in that: A diagonal brace is also fixedly connected to the inside corner of the top of the gantry frame.

10. The expansion bolt pull-out test device as described in claim 9, characterized in that: Limiting blocks are provided on both sides of the rear end of the gantry frame.

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