CN106404361A - Adjusting apparatus for structural test loading reaction frame - Google Patents

Abstract

The invention provides an adjusting apparatus for structural test loading reaction frame, comprising a large scale pipe clamp. The aperture size of the large scale pipe clamp matches the standing column of a testing machine. The two sides of the pipe clamp are fixedly provided with one of the two ends of support rods that are symmetrical with each other with one at the left and the other at the right; the other end of each support rod is provided with an axle. The two ends of the axle are provided with support rolling wheels. The support rolling wheel at one side of the pipe clamp is a universal rolling wheel while the support rolling wheel at the other side of the pipe clamp is an oriented wheel. Both the universal rolling wheel and the oriented wheel are provided with a locking device. The adjusting apparatus further comprises standing column rolling wheels mounted at the bottom of the standing column. All the standing column rolling wheels are universal rolling wheels. The lower part of the standing column is in screw thread cooperation with the adjusting nuts. The invention provides an adjusting apparatus for structural test loading reaction frame, which can accurately and conveniently realize the overall horizontal movement and crossbeam movement. The adjusting apparatus is also convenient to operate.

Description

Adjusting device for loading reaction frame in structural test

technical field

The invention relates to a structural test loading reaction frame device of a circular column, in particular to an adjusting device of a circular column type reaction frame, which realizes horizontal movement and vertical adjustment of a beam.

Background technique

The loading reaction frame required for structural tests is often self-assembled. Since it has been put into use, it has a wide range of uses. It can be used for compression, bending, and tensile tests on metals, non-metals, and composite materials. Play an important role. It has the advantages of simple appearance of the device, convenient and fast processing and construction operations, and low cost, but it also has the disadvantages of large mass, difficulty in moving the device, and lack of mobility in experimental sites without cranes, hoists and other lifting equipment; at the same time At present, the up and down movement of the beam on some (small) reaction frames requires manpower to unscrew the fixing nut (or turn the bolt), or use lifting equipment to raise (or lower) the beam, and then fix it artificially. The method is extremely inconvenient, and a more convenient adjustment device is needed.

Contents of the invention

In order to overcome the existing deficiencies of difficult overall translation of the reaction frame and movement of the crossbeam and inconvenient operation, the present invention provides an adjustment device for loading the reaction force frame for structural testing that can accurately and simply realize the overall translation and movement of the crossbeam and is easy to operate.

The technical solution adopted by the present invention to solve its technical problems is:

An adjustment device for a loading reaction frame for structural testing, comprising a large-scale pipe clamp whose aperture size is adapted to the column of the testing machine, one end of two left-right symmetrical support rods is fixed on both sides of the pipe clamp, and the other end of the support rod is A wheel shaft is installed at one end, and support rollers are installed at both ends of the wheel shaft. The support roller on one side of the pipe clamp is a universal roller, and the support roller on the other side of the pipe clamp is a directional roller. The universal roller Both the directional roller and the directional roller are equipped with a locking device, and the adjustment device also includes a column roller installed at the bottom of the column, and the column rollers are all universal rollers; the lower part of the column is threaded with the adjustment nut.

Further, the bottom of the upright column is located in the groove of the trough test stand, and the adjusting nut is located on the bottom surface of the trough test stand.

Still further, a stop nut is fixed on a column positioned in the groove.

Furthermore, the adjusting nut is connected with a spacer, and the spacer is slidably set on the upright column up and down.

The adjustment device also includes an up and down adjustment transmission mechanism, the up and down adjustment transmission mechanism includes a left and right symmetrical worm on the crossbeam, a crossbeam is arranged between two columns, and worm gears are built in at both ends of the crossbeam, and the worm gear has Internal and external threads, the internal thread of the worm wheel matches the external thread of the column of the reaction force frame, the two ends of the worm have threads at the worm wheel, and the thread of the worm matches the external thread of the worm wheel; There is a driving motor, and the output shaft of the driving motor is linked with the worm.

The up and down adjustment transmission will also include a limit switch fixed on the column.

The beneficial effects of the present invention are mainly manifested in: under the condition of no lifting, the structure can be simply moved horizontally by artificial means to test the loading reaction frame, and its maneuverability can be improved; Moving the beam on the upper part of the reaction frame can meet different test heights, and can keep the upper beam level, which is safe and convenient.

Description of drawings

Fig. 1 is a front view of the entire adjustment device, which is in a state of translational adjustment.

Figure 2 is a side view of the uprights and support rods.

Figure 3 is a top view of a single pipe clamp and support rod.

Figure 4 is a schematic diagram of the worm gear transmission.

Fig. 5 is a front view of the trough test stand, wherein Fig. 5a is a front view when the reaction force frame is loaded, and Fig. 5b is a front view when the reaction force frame moves.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

Referring to Figures 1 to 5, an adjustment device for a loading reaction frame for a structural test includes a large iron pipe clamp whose aperture size is compatible with the lifting screw of the testing machine (that is, the circular column, hereinafter referred to as the column). Two left and right symmetrical diameters of 3cm and 80° solid iron support rods are welded on both sides of the pipe clamp. Install support rollers at the end, the support rollers are universal rollers on one side of the pipe clamp, and directional rollers on the other side, and the support rollers are equipped with locking devices. The adjustment device also includes a column roller installed at the bottom of the column, and the column rollers are all universal rollers; the lower part of the column is screwed with the adjustment nut.

Before the reaction frame moves, fix the pipe clamp at the height specified by the column, that is, the uppermost plane of the pipe clamp is 110cm from the ground, engage with the column, and tighten. After the pipe clamp is fixed, the rollers at the bottom of the column and the bottom of the support rod are slightly higher than the ground, and the rollers at the bottom of the support rod are in a locked state. At the same time, loosen the nuts at the bottom of the column of the reaction force frame to ensure that the left and right columns are evenly lowered at the same time, so that the overall beam is kept horizontal, and the rollers of the translation adjustment device are in contact with the ground, and a horizontal load (artificial thrust) is applied slowly to make the bearing force Move the shelf to the desired position. After the reaction force frame is moved in place, the nut at the bottom of the column of the reaction force frame can be tightened.

The adjustment device also includes an up and down adjustment transmission mechanism, a built-in worm gear at both ends of the beam, the worm gear has internal and external threads, and the internal thread of the worm gear matches the external thread of the column of the reaction force frame. The up and down adjustment transmission device includes a left-right symmetrical worm on the crossbeam, the two ends of the worm are threaded at the worm wheel, and the middle is smooth. The worm thread matches the external thread of the worm wheel. A motor is installed on the beam. When the worm is energized, it rotates with the motor at a certain speed, driving the worm wheel to rotate at a certain speed. When the column is fixed, the worm wheel is forced to move, driving the beam to rise and fall horizontally. Since the two worm gears engaged with the column are driven by the same worm, the level of the beam during movement can be ensured. The up and down adjustment transmission device also includes a limit switch fixed on the column. That is, when the crossbeam falls to touch the limit switch, the circuit is disconnected, and the motor stops working.

As shown in Figure 1, 1 is a support rod (including iron pipe clamps and struts), and the specific structure is shown in Figure 2 and Figure 3; 2 is a support roller (two universal rollers at one end and two directional rollers at the other end) ; 3 is a column; 4 is a column roller, which is a universal roller; 5 is a beam; 6 is a hydraulic loader; 7 is a limit switch; 8 is a motor; 9 is a detachable power plug of the motor. When moving, the plug can be removed to avoid problems such as wire entanglement; 10 is the top connecting rod, which is used to protect the column and ensure integrity; 11 is a grooved test bench.

As shown in Figure 2, the support rod 1 adopts a diameter of 3 cm iron solid support rod; the length of the steel wire rope 14 is 80 cm, detachable, and is used to connect two support rollers (a directional roller and a universal roller) to improve the translation adjustment device. Stability; supporting roller 2 is a total of four front, rear, left, and right, wherein the two on one side of the moving direction are universal rollers, and the other side is a directional roller; 12 is the holding card of the iron pipe clamp, specifically see the top view of Fig. 3; the beam 5 is built-in the worm wheel; the worm 13 is engaged with the worm wheel and driven by the motor; 7 is the limit switch. The connection principle of the worm and the worm wheel is shown in FIG. 4 .

As shown in Figure 3, 12 is the holding card of the iron pipe clamp; 15 is a bolt with an L-shaped handle, which is used to fix and tighten the holding card, and the handle is easy to operate; 16 is a hexagonal nut; 1 is the support Bar; 14 is detachable wire rope.

As shown in FIG. 4 , 13 is the worm, 17 is the outer edge of the worm wheel, which is threadedly engaged with the worm, and 18 is the threaded engagement of the internal thread of the worm wheel and the column. When the worm starts to rotate clockwise (viewed from the right side) driven by the motor, it will drive the worm wheel to rotate counterclockwise. Since the column is fixed, the worm wheel moves up and down along the column, thereby driving the beam up and down move. When the crossbeam descends to touch the limit switch, the motor will cut off the power supply, that is, stop moving, ensuring safety.

As shown in Figure 5 (a), 11 is a trough test bench; 19 is the groove bottom of the trough test bench; 20 is the laboratory floor; 4 is the column roller; 21 is the connection (welding) between the column and the roller Iron sheet; 22 is a spacer; 23 is an adjusting nut; 24 is a limit nut (welded and fixed on the column).

When the reaction force frame was working normally, it was fixed by the adjusting nut 23, and the column was promoted so that the stop nut 24 was in close contact with the upper wall of the groove (i.e. compressed), and now the column roller 4 was 20mm away from the bottom of the groove. .

When the reaction frame needs to be moved horizontally, adjust the beam to touch the limit switch through the vertical adjustment transmission device of the beam, fix the iron pipe clamp at the designated position of the column, and tighten the bolts so that the iron pipe clamp cannot move up and down. At this moment, the roller at the bottom of the support rod is slightly higher than the ground (about 20mm), and is in a locked state. Simultaneously turn the adjustment nuts 23 on the left and right columns of the reaction force frame to keep both sides descending evenly until the column roller 4 touches the groove bottom 19, as shown in Figure 5 (b). At this moment, the locking device of the rollers at the bottom of the support rod can be opened, and the reaction force can be slowly promoted with less horizontal thrust (manpower), so as to achieve the purpose of horizontal movement.

This embodiment is applicable to the loading reaction frame of circular column structure test, which can move the device without the assistance of lifting equipment, and is convenient to use, so as to achieve the purpose of safety and convenience.

Claims (6)

1. A kind of adjustment device of structural test loading reaction force frame, it is characterized in that: comprise the large-scale pipe clamp that the aperture size and testing machine column are adapted, described pipe clamp both sides fix two left and right symmetrical support bars one end, The other end of the support rod is equipped with a wheel shaft, and supporting rollers are installed at both ends of the wheel shaft. The supporting roller on one side of the pipe clamp is a universal roller, and the supporting roller on the other side of the pipe clamp is a directional roller. , the universal roller and the directional roller are equipped with locking devices, and the adjustment device also includes a column roller installed at the bottom of the column, and the column rollers are all universal rollers; the lower part of the column and the adjustment nut Thread fit. 2. The adjustment device of the structural test loading reaction force frame as claimed in claim 1, wherein the bottom of the column is located in the groove of the trough test bench, and the adjusting nut is located on the bottom surface of the trough test bench . 3. The adjusting device of the loading reaction frame for structural testing according to claim 1 or 2, characterized in that: the limit nut is fixed on the upright in the groove. 4. The adjusting device of the loading reaction frame for structural testing according to claim 1 or 2, characterized in that: the adjusting nut is connected to a spacer, and the spacer is slidably set on the upright column. 5. The adjustment device of the structural test loading reaction force frame as claimed in claim 1 or 2, characterized in that: the adjustment device also includes an up and down adjustment transmission mechanism, and the up and down adjustment transmission mechanism includes a Left and right symmetrical worms, a beam is set between two columns, and worm gears are built in at both ends of the beams. The worm wheel is threaded, and the worm thread matches the external thread of the worm wheel; a driving motor is installed on the beam, and the output shaft of the driving motor is linked with the worm. 6 . The adjustment device of the loading reaction frame for structural testing according to claim 5 , wherein the up and down adjustment drive mechanism further includes a limit switch fixed on the column. 7 .