Prestress detection device for building steel structure

Abstract

The utility model relates to a building steel structure prestress detection device, which comprises a base arranged on a test bed; the adjusting table is slidably connected to the base; the tail fixing mechanism is arranged on the adjusting table; the front end positioning mechanism is arranged in front of the adjusting table; the locking mechanisms are used for clamping the front end of the steel structure, the number of the locking mechanisms is two, and the two locking mechanisms are connected through a positioning column; the hydraulic oil cylinder is fixedly connected with the positioning column; and the displacement sensor is connected with the front end of the steel structure. According to the device, steel plates of different sizes can be clamped and tensioned to measure the prestress through cooperation of the adjusting table capable of changing the position, the first wedge block, the second wedge block and the pressing piece, the adaptability is improved compared with a device only capable of measuring a round steel bar, and the device is more suitable for the field of steel structure prestress measurement.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel structure detection technical field more specifically, especially relates to a building steel structure prestress detection device. BACKGROUND

[0002] Steel structure is a kind of building structure by steel material composition, mainly by section steel and steel plate etc. The component such as steel beam, steel column, steel truss etc. Composition. When installing steel structure, some steel plates will be stretched to produce prestress in the installation process, to ensure the safety of parts need to carry out the prestress detection of steel plate.

[0003] The prestress detection device in the prior art can only detect steel bars, such as the steel structure prestress detection device disclosed in the announcement No. CN219830631 U, but steel bars do not belong to the scope of steel structure, and the device has small detection adaptability and cannot detect the prestress of steel plates. UTILITY MODEL CONTENT

[0004] The utility model overcomes the above-mentioned situation, and aims at providing a building steel structure prestress detection device, which can detect the prestress of steel plates of different sizes.

[0005] A building steel structure prestress detection device, comprising: a base placed on a test bench; an adjusting table slidingly connected to the base; a tail fixing mechanism provided on the adjusting table; a front end positioning mechanism provided in front of the adjusting table; a locking mechanism clamping the front end of the steel structure, the locking mechanism is provided with two groups, and the two groups of locking mechanisms are connected through positioning columns; a hydraulic oil cylinder fixedly connected with the positioning column; and a displacement sensor connected with the front end of the steel structure.

[0006] Further, two slide rails are provided on the base, a plurality of limiting holes are provided on the slide rails, a positioning pin is detachably connected to the limiting hole, and the adjusting table is slidingly connected to the slide rail.

[0007] Further, the tail fixing mechanism comprises:

[0008] A first limiting frame fixedly connected to the top of the adjusting table, and the steel structure penetrates the first limiting frame;

[0009] A first wedge slidingly connected to the first limiting frame, and the bottom surface of the first wedge is attached to the surface of the steel structure;

[0010] A hydraulic rod fixedly connected with the first wedge.

[0011] Further, the inclination direction of the hydraulic rod is parallel to the inclination direction of the first wedge, and the fixed end of the hydraulic rod is fixedly connected with the first limiting frame through a support.

[0012] Further, the front end positioning mechanism comprises:

[0013] A second limiting frame fixed to the base, and the front end of the steel structure penetrates the second limiting frame;

[0014] A threaded rod screwed to the side wall of the second limiting frame;

[0015] A pressing piece arranged at the front end of the threaded rod, and the pressing piece is attached to the side wall of the steel structure.

[0016] Further, the locking mechanism comprises:

[0017] A second wedge slidingly connected to the second limiting frame;

[0018] A connecting piece detachably connected to the second wedge, and the connecting piece is L-shaped.

[0019] Further, an end of the second wedge is provided with a screw rod, the screw rod penetrates the front end of the connecting piece, and a first nut can be screwed to the end of the screw rod.

[0020] Further, the positioning column penetrates the connecting piece, the side wall of the positioning column is provided with threads, and a second nut can be screwed to the positioning column.

[0021] Further, the base is provided with a counterforce plate, the fixed end of the hydraulic oil cylinder is fixed to the counterforce plate, and the fixed end of the displacement sensor is also fixed to the counterforce plate.

[0022] Further, the side of the adjusting table is also provided with a stress detector, and the strain gauge of the stress detector is connected to the steel structure.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] ①The adjusting table, the first wedge, the second wedge and the pressing piece can be changed in position, so that the device can clamp and tension measure the prestress of steel plates of different sizes, the adaptability of the device is increased compared with the device capable of measuring only circular steel bars, and the device is more suitable for the field of steel structure prestress measurement. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute a limitation on the utility model. In the drawings:

[0026] Figure 1 It is a whole structure schematic view of a building steel structure prestress detection device.

[0027] Figure 2This is a schematic diagram of the front-end positioning mechanism and locking mechanism in a prestressed steel structure testing device.

[0028] In the diagram: 1. Base; 11. Slide rail; 111. Limiting hole; 112. Positioning pin; 12. Reaction plate; 13. Groove; 2. Adjusting platform; 3. Tail fixing mechanism; 31. First limiting frame; 32. First wedge; 33. Hydraulic rod; 34. Bracket; 4. Front positioning mechanism; 41. Second limiting frame; 42. Threaded rod; 43. Pressing plate; 5. Locking mechanism; 51. Second wedge; 52. Connecting piece; 6. Positioning column; 7. Hydraulic cylinder; 8. Displacement sensor; 9. Stress detector; 91. Strain gauge. Detailed Implementation

[0029] 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.

[0030] like Figure 1 As shown, a prestressed steel structure testing device includes: a base 1 placed on a test bench; an adjustment platform 2 slidably connected to the base 1; a tail fixing mechanism 3 provided on the adjustment platform 2; a front positioning mechanism 4 provided in front of the adjustment platform 2; a locking mechanism 5 for clamping the front end of the steel structure, the locking mechanism 5 having two sets, the two sets of locking mechanisms 5 being connected by a positioning column 6; a hydraulic cylinder 7 fixedly connected to the positioning column 6; and a displacement sensor 8 connected to the front end of the steel structure.

[0031] The base 1 is a rectangular plate structure with two slide rails 11 protruding from its upper surface. Each slide rail 11 has several limiting holes 111, with equal spacing between adjacent holes. Positioning pins 112 are detachably connected to each limiting hole 111. The adjusting platform 2 is slidably connected to the slide rails 11. The adjusting platform 2 adapts to the length of the steel structure to be inspected by sliding, ensuring that both ends of the steel structure are clamped, guaranteeing normal inspection. The positioning pins 112 restrict the position of the adjusting platform 2. When the positioning pins 112 are inserted into the limiting holes 111, they prevent the adjusting platform 2 from sliding back and forth, thus avoiding wobbling during prestress testing.

[0032] The tail end is fixed and moves together with the adjustment platform 2. The tail end fixing mechanism 3 includes: a first limiting frame 31 fixed to the top of the adjustment platform 2. The length of the first limiting frame 31 is greater than the width of the steel structure to be tested. The steel structure passes through the first limiting frame 31 and the bottom of the steel structure is in contact with the bottom of the first limiting frame 31; a first wedge 32 slidably connected to the first limiting frame 31. The bottom surface of the first wedge 32 is in contact with the upper surface of the steel structure. The small end face of the first wedge 32 is inserted into the first limiting frame 31. The first wedge 32 and the first limiting frame 31 cooperate to clamp the steel structure; and a hydraulic rod 33 fixed to the first wedge 32. The hydraulic rod 33 uses pressure to make the first wedge 32 clamp the steel structure.

[0033] The tilting direction of the hydraulic rod 33 is parallel to the tilting direction of the first wedge 32. The fixed end of the hydraulic rod 33 is fixed to the first limiting frame 31 through the bracket 34. The bracket 34 provides a reaction force for the hydraulic rod 33. The hydraulic rod 33 is telescopic. When the hydraulic rod 33 is extended, the bottom horizontal surface of the first wedge 32 moves downward, increasing the clamping force on the steel structure.

[0034] like Figure 2 As shown, the front positioning mechanism 4 clamps the front end of the steel structure. The front positioning mechanism 4 includes: a second limiting frame 41 fixed to the base 1, the front end of the steel structure passing through the second limiting frame 41, the steel structure being located in the middle of the second limiting frame 41, and the steel structure not contacting the inner wall of the second limiting frame 41; threaded rods 42 screwed to the two side walls of the second limiting frame 41; and a clamping plate 43 located at the front end of the threaded rod 42, the side wall of the clamping plate 43 being in contact with the front end of the threaded rod 42, and the clamping plate 43 being in contact with the side wall of the steel structure. In use, the threaded rod 42 is rotated to press against the clamping plate 43, thereby causing the two clamping plates 43 to cooperate and clamp the steel structure.

[0035] The locking mechanism 5, in conjunction with the front positioning mechanism 4, clamps the front end of the steel structure. The locking mechanism 5 includes: a second wedge 51 slidably connected to the second limiting frame 41, the horizontal surfaces of the two second wedges 51 being in contact with the upper and lower surfaces of the steel structure, the small end face of the second wedge 51 being inserted into the upper and lower gap between the steel structure and the inner wall of the second limiting frame 41, and the two second wedges 51 clamping the steel structure; and a connector 52 detachably connected to the second wedges 51, the connector 52 being L-shaped, which moves the second wedges 51 into the second limiting frame 41 by pulling the connector 52.

[0036] A screw is provided on the large end face of the second wedge 51. The screw passes through the front end of the connector 52. A first nut can be screwed to the end of the screw. The first nut fixes the connector 52 and the second wedge 51. The front end of the connector 52 is located at the front end of the second limiting frame 41.

[0037] The positioning column 6 penetrates the front end of the connecting piece 52, and the positioning column 6 connects the two connecting pieces 52 together, and when the positioning column 6 moves, the two connecting pieces 52 and the second wedge block 51 are synchronously moved, the side wall of the positioning column 6 is provided with a thread, and the second nut can be screwed on the positioning column 6, and the second nut further fixes the position of the connecting piece 52. A groove 13 is formed in the base 1, and the bottom of the positioning column 6 slides in the groove 13, and the groove 13 limits the movement path of the positioning column 6.

[0038] The base 1 is provided with a counterforce plate 12, and the fixed end of the hydraulic oil cylinder 7 is fixedly connected to the counterforce plate 12. When the steel structure prestress is detected, the hydraulic oil cylinder 7 is contracted, the hydraulic oil cylinder 7 drives the positioning column 6, the connecting piece 52 and the second wedge block 51 to move towards the counterforce plate 12, at this time, the two second wedge blocks 51 clamp and tension the steel structure, so that the steel structure generates prestress. When the hydraulic oil cylinder 7 works, the pressure generated is transmitted to the test bench in a wired or wireless manner, which is convenient for detection personnel to collect.

[0039] The fixed end of the displacement sensor 8 is also fixedly connected to the counterforce plate 12, and the front end of the displacement sensor 8 is attached to the steel structure. The displacement sensor 8 detects the movement of the steel structure.

[0040] The side of the adjusting table 2 is also provided with a stress detector 9, and the strain sheet 91 of the stress detector 9 is connected to the side of the steel structure. The stress detector 9 measures the stress in the middle of the steel structure.

[0041] The device can clamp and tension the steel plate of different sizes to measure the prestress through the adjusting table 2 which can change the position and the cooperation of the first wedge block 32, the second wedge block 51 and the pressing piece 43. Compared with the device which can only measure circular steel bars, the adaptability is increased, and the device is more suitable for the field of steel structure prestress measurement.

[0042] Finally, it should be noted that: the above only describes the preferred embodiments of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, and for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A device for detecting the prestress of a building steel structure, characterized in that, The utility model relates to a steel structure tail end positioning device, including: The base (1) is placed on the test bench; The adjusting table (2) is slidably connected to the base (1); The tail fixing mechanism (3) is arranged on the adjusting table (2); The front end positioning mechanism (4) is arranged in front of the adjusting table (2); The locking mechanism (5) clamps the front end of the steel structure, and the locking mechanism (5) is provided with two groups; The hydraulic oil cylinder (7) is fixedly connected with the positioning column (6); The displacement sensor (8) is connected with the front end of the steel structure.

2. The building steel structure prestress detection device according to claim 1, characterized in that: The base (1) is provided with two slide rails (11), a plurality of limiting holes (111) are arranged on the slide rails (11), the limiting holes (111) are detachably connected with positioning pins (112), and the adjusting table (2) is slidably connected to the slide rails (11).

3. The device for detecting the prestress of a building steel structure according to claim 2, characterized in that: The tail fixing mechanism (3) includes: The first limiting frame (31) is fixedly connected to the top of the adjusting table (2), and the steel structure penetrates the first limiting frame (31); The first wedge block (32) is slidably connected to the first limiting frame (31), and the bottom surface of the first wedge block (32) is attached to the surface of the steel structure; The hydraulic rod (33) is fixedly connected with the first wedge block (32).

4. The device for detecting the prestress of a building steel structure according to claim 3, characterized in that: The inclination direction of the hydraulic rod (33) is parallel to the inclination direction of the first wedge block (32), and the fixed end of the hydraulic rod (33) is fixedly connected with the first limiting frame (31) through the support (34).

5. The device for detecting the prestress of a building steel structure according to claim 4, characterized in that: The front end positioning mechanism (4) includes: The second limiting frame (41) is fixedly connected to the base (1), and the front end of the steel structure penetrates the second limiting frame (41); The threaded rod (42) is screwed on the side wall of the second limiting frame (41); The pressing sheet (43) is arranged at the front end of the threaded rod (42), and the pressing sheet (43) is attached to the side wall of the steel structure.

6. The device for detecting the prestress of a building steel structure according to claim 5, characterized in that: The locking mechanism (5) includes: The second wedge block (51) is slidably connected to the second limiting frame (41); The connecting piece (52) is detachably connected to the second wedge block (51), and the connecting piece (52) is L-shaped.

7. The device for detecting the prestress of a building steel structure according to claim 6, characterized in that: The end of the second wedge block (51) is provided with a screw rod, the screw rod penetrates the front end of the connecting piece (52), and the first nut can be screwed on the end of the screw rod.

8. The device for detecting the prestress of a building steel structure according to claim 7, characterized in that: The positioning column (6) penetrates the connecting piece (52), and the side wall of the positioning column (6) is provided with threads, and the second nut can be screwed on the positioning column (6).

9. The device for detecting the prestress of a building steel structure according to claim 8, characterized in that: The base (1) is provided with a counterforce plate (12), the fixed end of the hydraulic oil cylinder (7) is fixedly connected to the counterforce plate (12), and the fixed end of the displacement sensor (8) is also fixedly connected to the counterforce plate (12).

10. The device for detecting the prestress of a building steel structure according to claim 9, characterized in that: The side of the adjusting table (2) is also provided with a stress detector (9), and the strain sheet (91) of the stress detector (9) is connected with the steel structure.

Images