Rain sewage square cover plate bearing test system

Abstract

The utility model relates to a rain sewage square cover plate bearing test system which comprises a supporting unit used for supporting a cover plate, the supporting unit comprises a first steel base plate arranged at the bottom end of the cover plate and a second steel base plate arranged at the top end of the cover plate, and the long axis direction of the cover plate is limited as the first direction; the breadth direction of the cover plate is a second direction; the auxiliary supporting unit is arranged beside the supporting unit and comprises a track beam, the track beam and the cover plate are distributed in parallel in the first direction, and the track beam extends in the second direction; and the pressurizing unit comprises a pressurizing box, the two sides of the pressurizing box are supported on the second steel base plate and the track beam respectively, and a balancing weight is placed in the pressurizing box. According to the bearing test system provided by the utility model, the supporting unit, the auxiliary supporting unit and the pressurizing unit are matched with one another to carry out a bearing test on the cover plate, so that the test precision is high, and the phenomenon that the balancing weight falls off is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of cover plate test, especially a rain and sewage square culvert cover plate bearing test system. BACKGROUND

[0002] Rail-mounted crane refers to the running type rotary crane that is disassembled and reinstalled when transferring the work site on the track laid on the ground, including tower crane, gantry crane, etc.

[0003] Rail-mounted crane is mainly composed of the following parts: hoisting mechanism: the hoisting mechanism includes hoisting motor, the motor drives the drum to rotate through the transmission components such as shaft coupling, the drum is wound with steel wire rope, the lower end of the steel wire rope is connected with the container special sling, when the motor rotates forward, the drum releases the steel wire rope, drives the sling to descend; when the motor reverses, the drum retracts the steel wire rope, makes the sling rise, thereby realizing the lifting and lowering of the container; cart running mechanism: the portal crane runs along the track laid on the ground, its cart running mechanism includes motor, reducer, wheel and other components, the power of the motor is transmitted to the wheel after being decelerated by the reducer, the wheel rolls on the track, drives the whole portal crane to move longitudinally along the track, so that the position can be adjusted in the yard range covered by the track to hoist the container in different positions; trolley running mechanism: the trolley is the part that moves transversely on the main beam of the portal crane, its running mechanism also contains motor, reducer and wheel, the power transmission mode of the trolley running mechanism is similar to that of the cart running mechanism, the wheel rolls on the main beam track driven by the motor, makes the trolley move transversely, combined with the movement of the cart and the hoisting mechanism, the container can be accurately positioned and hoisted; main beam structure: the main beam structure is composed of two box-shaped end beams supported on rigid and flexible legs, at present, the offset rail box beam is often used, in order to make the flange weld seam avoid the high stress area caused by wheel pressure, the "T" steel is welded with the main beam panel and the bearing web in the rail bearing part, the main beam is connected with the rigid leg by high-strength bolts or welding mode, and connected with the flexible leg by hinged connection mode; door leg structure: the rigid door leg and the flexible door leg both adopt box-shaped structure, for the rail-mounted container gantry crane with small and medium span, both sides of the door leg are made into rigid door leg, for the "Π" shaped door leg, the strength and rigidity along the cart direction are realized through the rigid connection of the door leg and the top cross beam; for the "U" shaped door leg, the rigid connection of the door leg and the bottom cross beam is realized.

[0004] At present, in order to ensure the structural strength of each component constituting the rail-mounted crane, the carrying capacity of some components needs to be tested after being processed, for example, the pile leg, the connecting support, the mounting support, the cable groove cover plate, the rain and sewage square culvert cover plate and the like, so as to ensure the structural strength of the rail-mounted crane. At present, when the rain and sewage square culvert cover plate is subjected to the carrying test, the traditional way is to support the two sides of the rain and sewage square culvert cover plate on a pad respectively, so that the rain and sewage square culvert cover plate is suspended, and then the counterweight block is directly placed on the rain and sewage square culvert cover plate to carry out the carrying test on the rain and sewage square culvert cover plate.

[0005] The above test method is used to test the rain and sewage square culvert cover plate. Generally, the rain and sewage square culvert cover plate is usually of a long and thin structure, that is, the length of the rain and sewage square culvert cover plate is much larger than the width of the rain and sewage square culvert cover plate. Generally, the counterweight block is usually small and cylindrical or cuboid in structure. Therefore, during the test, the stress is not uniform, especially when the number of the placed counterweight blocks is small, some parts are subjected to large stress or some parts are subjected to small stress, thereby leading to inaccurate test results. In addition, once the local weight is too heavy, the rain and sewage square culvert cover plate will be bent or even broken, thereby causing the counterweight block placed on the rain and sewage square culvert cover plate to fall, which has a safety hazard. The utility model discloses a rain and sewage square culvert cover plate carrying test system which has high test precision and avoids falling.

[0006] The utility model discloses a rain and sewage square culvert cover plate carrying test system which has high test precision and avoids falling.

[0007] In order to solve the above technical problems, the technical scheme of the utility model is as follows: a rain and sewage square culvert cover plate carrying test system, which is characterized by comprising

[0008] The support unit is used for supporting the cover plate, and comprises a first steel pad plate arranged at the bottom end of the cover plate and a second steel pad plate arranged at the top end of the cover plate. The long axis direction of the cover plate is defined as the first direction, and the width direction of the cover plate is defined as the second direction. The first steel pad plate is arranged on both sides of the cover plate along the first direction, and the second steel pad plate is arranged at the middle position of the cover plate along the second direction.

[0009] The auxiliary support unit is arranged beside the support unit, and comprises a track beam which is arranged parallel to the cover plate along the first direction and extends along the second direction.

[0010] The pressurizing unit comprises a pressurizing box supported on the second steel base plate and the rail beam at two sides respectively, and the length of the pressurizing box in the second direction is longer than the length of the second steel base plate and shorter than the length of the rail beam, the pressurizing box is a hollow cuboid box with an open upper end, and a counterweight is arranged in the pressurizing box.

[0011] Further, a wooden square is arranged at each side of the support unit in the second direction, and the height of the upper end surface of the wooden square is lower than the height of the second steel base plate, and one side of the wooden square is directly below the pressurizing box.

[0012] Further, the pressurizing box comprises a base, columns arranged on the base, and cross beams connecting the columns, and an inclined brace is arranged between the columns, a plurality of positioning plates are arranged on the upper end surface of the base of the pressurizing box, the positioning plates are in inverted V shape, and two adjacent positioning plates are cooperatively arranged to position the counterweight, and an inclined surface cooperatively arranged with the positioning plate is arranged at each side of the bottom end of the counterweight, and the two inclined surfaces of the counterweight are in inverted eight character shape.

[0013] Further, a positioning protrusion extending upward is arranged at the top end of the counterweight, and a positioning groove cooperatively arranged with the positioning protrusion is arranged at the bottom end of the counterweight.

[0014] The bearing test system of the utility model has the advantages that the bearing test of the cover plate is carried out through the cooperation of the support unit, the auxiliary support unit and the pressurizing unit, the counterweight does not directly press the cover plate, but the whole pressurizing box presses the cover plate, the pressure is more uniform, the test precision is improved, the counterweight is arranged in the pressurizing box, and the falling of the counterweight is avoided.

[0015] The cooperation of the positioning plate on the base and the inclined surface at the two sides of the bottom end of the counterweight can position the bottommost counterweight when the counterweight is arranged in the pressurizing box, limit the initial position of the counterweight, provide a basis for the subsequent test precision, avoid the sliding and shifting of the counterweight in the pressurizing box when the cover plate is bent and the pressurizing box is inclined during the test, and ensure the fixation of the position of the counterweight.

[0016] The wooden square at the two sides of the support unit is used for anti-falling protection, avoids the excessive bending or even the breaking of the cover plate during the bearing test, avoids the direct falling of the pressurizing box on this side, has a good protection effect, and avoids safety accidents.

[0017] The design of the positioning protrusions and positioning grooves on the counterweights serves to limit the relative position between two adjacent counterweights distributed vertically, preventing the counterweights from sliding or shifting during the test and ensuring the stability of each counterweight's position. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the load-bearing test system for the rainwater and sewage square cover plate of this utility model.

[0019] Figure 2 This is a side view of the stormwater and sewage square cover plate load-bearing test system of this utility model.

[0020] Figure 3 This is a side view from another direction of the rainwater and sewage square cover plate load-bearing test system of this utility model.

[0021] Figure 4 This is a schematic diagram of the cover plate test block before testing in this utility model.

[0022] Figure 5 This is a schematic diagram of the cover plate test block after testing in this utility model. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0024] like Figures 1-3 The system shown is a load-bearing test system for stormwater and sewage cover slabs, including

[0025] A support unit for supporting the cover plate 1 includes a first steel pad 2 disposed at the bottom of the cover plate 1 and a second steel pad 3 disposed at the top of the cover plate 1. Both the first steel pad 2 and the second steel pad 3 are rectangular plates, defining the long axis direction of the cover plate 1 as the first direction and the width direction of the cover plate 1 as the second direction. There are two first steel pads 2, which are distributed on both sides of the cover plate along the first direction, and there is one second steel pad 3, which is located in the middle of the cover plate 1.

[0026] On both sides of the support unit in the second direction, a wooden block 13 is also provided, and the height of the upper end of the wooden block 13 is lower than the height of the second steel pad 3. The wooden block 13 is a cuboid structure, and one side of the wooden block 13 is located directly below the pressure box. The design of the wooden blocks 13 on both sides of the support unit is for fall protection, to prevent the cover plate from excessive bending or even breakage during the load test, which could lead to the direct fall of that side of the pressure box. This provides good protection and avoids safety accidents.

[0027] An auxiliary support unit is arranged beside the support unit, and the auxiliary support unit comprises a track beam 14 which is arranged in parallel with the cover plates along the first direction and extends along the second direction.

[0028] The pressurizing unit comprises a pressurizing box which is supported on the second steel base plate 3 and the track beam 14 at two sides thereof and has a length in the second direction which is longer than that of the second steel base plate 3 and shorter than that of the track beam 14. The pressurizing box is a hollow cuboid box with an open upper end, and the counterweight 7 is arranged in the pressurizing box. The counterweight 7 is a cuboid counterweight.

[0029] The pressurizing box comprises a base 4, columns 5 arranged on the base 4, and cross beams 6 connecting the columns 5. The base 4, the columns 5, and the cross beams 6 are welded to form a hollow cuboid pressurizing box. In addition, inclined braces are arranged between the columns 5. The two sides of each inclined brace are welded to the two adjacent columns 5. In addition, triangular reinforcing plates 10 are welded between the upper and lower sides of each column 5 and the cross beams 6 and the base 4. In addition, lifting lugs 9 are arranged on the columns 5 or the cross beams 6 for lifting.

[0030] In addition, positioning plates 11 are arranged on the upper end surface of the base 4 of the pressurizing box. The positioning plates 11 are inverted V-shaped and are welded to the base 4. Two adjacent positioning plates 11 cooperatively position the counterweight 7. In addition, inclined surfaces are arranged on the two sides of the bottom end of the counterweight 7 and cooperatively position the positioning plates 11. The two inclined surfaces of the counterweight 7 are inverted eight-shaped. The cooperation between the positioning plates 11 on the base 4 and the inclined surfaces on the two sides of the bottom end of the counterweight 7 positions the bottommost counterweight 7 when the counterweight 7 is arranged in the pressurizing box, thereby limiting the initial position of the counterweight 7 and providing a basis for subsequent accurate tests. In addition, the cooperation between the positioning plates 11 on the base 4 and the inclined surfaces on the two sides of the bottom end of the counterweight 7 prevents the counterweight 7 from sliding or moving in the pressurizing box when the cover plates are bent and the pressurizing box is inclined, thereby fixing the position of the counterweight 7.

[0031] In addition, positioning protrusions 8 extending upward are arranged on the two sides of the top end of the counterweight 7, and positioning grooves cooperatively positioned with the positioning protrusions 8 are arranged on the bottom end of the counterweight 7. The positioning protrusions 8 and the positioning grooves cooperatively position the adjacent counterweights 7 arranged above and below each other, thereby preventing the counterweights 7 from sliding or moving during the test and fixing the positions of the counterweights 7.

[0032] The load-bearing test system of this utility model conducts a load-bearing test on the cover plate through the cooperation of the support unit, the auxiliary support unit and the pressurizing unit. The counterweight is not directly pressed on the cover plate, but is pressed on the cover plate as a whole through the pressurizing box, which makes the pressure more uniform and improves the test accuracy. At the same time, placing all the counterweights in the pressurizing box also avoids the phenomenon of counterweights falling.

[0033] Based on the above-mentioned load-bearing test system, the load-bearing capacity test of the cover plate is achieved through the following steps:

[0034] S1: First, prepare the cover plate test block 1, first steel pad 2, second steel pad 3, track beam 14, pressure box, counterweight 7, gantry crane, and wire rope 12 required for the load-bearing test. Before the test, mark the test line 15 in the middle of the cover plate test block 1. The test line 15 extends along the long axis of the cover plate test block 1. Figure 4 As shown, the length of the cover plate test block 1 is 1700mm, the length of the first steel pad 2 is 500mm and the width is 250mm, the length and width of the second steel pad 3 are both 500mm, the lifting capacity of the gantry crane is 40t, the weight of a single counterweight block 7 is 5t, the track beam 14 is a 316 track beam, the weight of the pressure box is 15t, there are four wire ropes 12, and each wire rope 12 is equipped with a 10t shackle.

[0035] S2: Then, using a gantry crane and with the help of wire rope 12, the various components are lifted according to... Figure 1 The load-bearing test system shown is placed in sequence, and the test begins after confirming that it is placed stably and that there are no other irrelevant personnel around. At this time, no counterweight 7 is placed in the pressure chamber.

[0036] S3: Loading test. In the initial state, the pressure box is unloaded. Using a gantry crane with the help of wire rope 12, the counterweight 7 is hoisted and placed in the pressure box. The positioning plate 11 is used to position the bottom counterweight 7. The positioning protrusion 8 at the top of the counterweight 7 of the next layer is embedded in the positioning groove at the bottom of the counterweight 7 of the previous layer, so as to realize the positioning and placement between two adjacent counterweights 7. Each load is 10t. The counterweights 7 are evenly placed in the pressure box. There are 7 levels in total, namely 15t, 25t, 35t, 45t, 55t, 65t and 75t.

[0037] When the loading of the counterweight 7 is performed, 15 minutes are required between each loading level, and the maximum deflection of the cover plate test block 1 in the long axis direction is measured and recorded. When the maximum deflection is measured, a horizontal line 16 is redrawn according to the end points on both sides of the detection line 15 on the cover plate test block 1, as shown in the figure, and the interval between the horizontal line 16 and the lowest point of the detection line 15 is measured, which is the deflection of the cover plate test block 1. When the maximum deflection exceeds L / 200, the subsequent loading test is cancelled, and L is the length of the cover plate test block 1.

[0038] When the loading test is performed, if the cover plate test block 1 has a crack, the test is immediately stopped, and the cover plate test block 1 is determined to be unqualified.

[0039] S4: unloading test, after the completion of the loading test, the unloading test is continued, the counterweight 7 and the pressure box are sequentially lifted away from the cover plate test block 1 by the gantry crane, the unloading test has 3 levels, which are 55t, 35t and 0t in turn, and 15 minutes are required between each unloading level, and the residual deformation is observed and recorded.

[0040] S5: complete the cover plate bearing test.

[0041] The bearing test system based on the utility model, when the bearing test is performed, the cover plate is subjected to the bearing test by the cooperation of the loading test and the unloading test, a plurality of different levels of weights are used to sequentially perform the bearing test on the cover plate, the bearing capacity test of the cover plate can be accurately realized, so as to ensure that the cover plate can meet the bearing capacity requirement.

[0042] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as above, it is not intended to limit the utility model. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution of the utility model, and any equivalent embodiment with equivalent changes and modifications is still within the scope of the utility model.

Claims

1. A rainwater and sewage square culvert cover bearing test system, characterized in that: The utility model relates to a roof support system, which comprises a support unit, an auxiliary support unit and a pressurizing unit. The support unit comprises first steel base plates arranged at the bottom ends of the roof panels and a second steel base plate arranged at the top end of the roof panels. The first steel base plates are arranged on both sides of the roof panels along the first direction. The auxiliary support unit comprises a track beam arranged beside the support unit.

2. The stormwater and sewage square culvert bearing test system according to claim 1, characterized in that: The track beam is arranged parallel to the roof panels along the first direction.

3. The stormwater and sewage square culvert bearing test system according to claim 1, characterized in that: The pressurizing unit comprises a pressurizing box.

4. The stormwater and sewage square culvert bearing test system according to claim 1, characterized in that: The pressurizing box is supported on the second steel base plate and the track beam. The length of the pressurizing box in the second direction is longer than that of the second steel base plate and shorter than that of the track beam. The pressurizing box is a hollow cuboid box with an open top end. A counterweight is arranged in the pressurizing box. The support unit is further provided with a wooden block on both sides in the second direction. The upper end surface of the wooden block is lower than the second steel base plate. One side of the wooden block is arranged directly below the pressurizing box. The pressurizing box comprises a base, columns arranged on the base and cross beams connecting the columns. Inclined braces are arranged between the columns. A plurality of positioning plates are arranged on the upper end surface of the base of the pressurizing box. The positioning plates are in the shape of inverted V. Two adjacent positioning plates cooperatively position the counterweight. Inclined surfaces are arranged on both sides of the bottom end of the counterweight. The two inclined surfaces of the counterweight are in the shape of inverted eight. A positioning protrusion extending upward is arranged on the top end of the counterweight. A positioning groove is arranged on the bottom end of the counterweight and cooperates with the positioning protrusion.

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