Testing device for pre-buried channel shearing working load test

Abstract

The utility model discloses a testing device for a shear working load test of a pre-buried channel, which comprises a testing machine, and a test bed is fixed on a lower jaw at the bottom of the testing machine; the concrete test block is placed on the test bed, one side of the concrete test block is provided with a channel, and a bolt is fixed on the channel; the shearing plate is fixedly arranged on the bolt in a sleeving manner and is locked and fixed through a locking nut; one end of the flexible force transmission assembly is connected with an upper jaw at the top of the testing machine, and the other end of the flexible force transmission assembly is connected with the shear plate; and the clamping tool is mounted on the top end surface of the test bed and is used for fixing the concrete test block. According to the device, a traditional applied pressure stress load is changed into an upward tensile stress load, the upper jaw and the shear plate are connected through the flexible force transmission assembly, flexible force transmission is achieved between the upper jaw and the shear plate, and even if the shear plate deforms, the upper jaw cannot be damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of embedded groove detection, and more specifically to a test device for shear working load test of embedded groove. Background Art

[0002] The channel is a steel structure component used in railways, tunnels, bridges, locomotives, nuclear power plants, and housing construction. During use, the entire channel is buried in concrete, leaving a C-shaped cavity for the hanging bolts to fix the hanging product.

[0003] Generally, a testing machine 1 is used to test the shear resistance of the bolts 22 in the grooves 21 on the concrete test block 2. Figure 1 As shown, in the conventional shear test device, the test machine 1 applies a shear load downward to the upper jaw 13 through the loading force device 19 thereon, and the upper jaw 13 transmits the shear force to the shear plate 3, that is, there is a rigid force conduction between the loading force device 19 and the shear plate 3, so that when the bending of the bolt 22 during the shearing process causes the shear plate 3 to deform, the force line of the upper jaw 13 and the force point of the shear plate 3 are not in a straight line, which will cause damage to the upper jaw 13. In addition, after the concrete test block 2 is placed on the test machine 1, in order to ensure that the force line of the upper jaw 13 and the force point of the shear plate 3 are in a straight line, and thus ensure the test accuracy, it is necessary to pre-align the position of the shear plate 3 on the concrete test block 2 with the upper jaw 13 on the test machine 1, and the conventional operation relies on manually moving the bulky concrete test block multiple times, which is time-consuming and labor-intensive.

[0004] Therefore, how to provide a test device for shear working load test of embedded groove which will not cause damage to the upper jaw and is easy to align the shear plate and the upper jaw on the concrete test block, saving time and effort is an urgent problem to be solved by technical personnel in this field. Utility Model Content

[0005] In view of this, the utility model provides a test device for shear working load test of embedded grooves which will not cause damage to the upper jaw and is easy to align the shear plate and the upper jaw on the concrete test block, saving time and effort.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A test device for a shear working load test of an embedded channel, comprising:

[0008] A testing machine, wherein a test bench is fixed on a lower jaw at the bottom of the testing machine;

[0009] A concrete test block, the concrete test block is placed on the test bench, one side of the concrete test block is provided with a groove, and the groove is fixed with bolts;

[0010] A shear plate, wherein the shear plate is sleeved on the bolt and is locked and fixed by a locking nut;

[0011] A flexible force transmission component, one end of which is connected to the upper jaw at the top of the testing machine, and the other end of which is connected to the shear plate;

[0012] A clamping fixture is installed on the top surface of the test bench and is used to fix the concrete test block.

[0013] It can be seen from the above technical solutions that, compared with the prior art, the utility model discloses a test device for pre-buried groove shear working load test, wherein the loading force device on the test machine transmits the tensile stress load to the shear plate through the flexible force transmission component, and the shear plate applies tensile stress to the bolts on the groove, thereby realizing the bolt shear performance test. The device changes the traditional applied compressive stress load into an upward tensile stress load, and connects the upper jaw and the shear plate through a flexible force transmission component, so that the upper jaw and the shear plate are flexible force transmission, and even if the shear plate is deformed, the upper jaw will not be damaged.

[0014] Furthermore, the flexible force transmission component comprises:

[0015] An upper sleeve, the upper end of which is clamped and fixed on the upper jaw;

[0016] A connecting screw, the upper end of which is threadedly connected to the lower barrel opening of the upper sleeve;

[0017] A lower sleeve, the upper sleeve opening of which is threadedly connected to the lower end of the connecting screw;

[0018] a first flexible chain, wherein the upper end of the first flexible chain is connected to the lower end of the lower sleeve;

[0019] A metal rod, the upper end of which is connected to the lower end of the first flexible chain;

[0020] A second flexible chain, wherein the upper end of the second flexible chain is connected to the lower end of the metal rod, and the lower end of the second flexible chain is connected to the top end of the shear plate.

[0021] The beneficial effects of adopting the above technical solution are: upper sleeves of different sizes can be replaced, so that the flexible force transmission component can adapt to upper jaws of different sizes, thereby improving ease of use, and flexible force transmission between the upper jaw and the shear plate is achieved through the flexible chain. Even if the shear plate is deformed, the upper jaw will not be damaged.

[0022] Furthermore, the upper end of the first flexible chain is connected to the lower end of the lower sleeve through a first universal joint, the upper end of the metal rod is connected to the lower end of the first flexible chain through a second universal joint, the upper end of the second flexible chain is connected to the lower end of the metal rod through a third universal joint, and the lower end of the second flexible chain is connected to the top of the shear plate through a fourth universal joint.

[0023] The beneficial effect of adopting the above technical solution is: improving the flexibility of the connection between the flexible chain and each component, and avoiding the problem of poor force transmission effect caused by rigid connection.

[0024] Furthermore, it also includes an alignment plate, the concrete test block is placed on the top of the alignment plate, and a plurality of roller assemblies that are in rolling contact with the top surface of the test bench are installed on the alignment plate.

[0025] The beneficial effect of adopting the above technical solution is: during the test, the concrete test block is placed on the alignment plate, and then the alignment plate is moved by the roller assembly to align the force point of the shear plate on the concrete test block with the upper jaw position of the testing machine, and then the concrete test block is fixed on the test bench by the clamping fixture, and then the subsequent testing process is carried out. Therefore, the device uses a movable alignment plate, which can drive the concrete test block on it to move in position, and it is easy to align the force point of the shear plate on the concrete test block with the upper jaw position of the testing machine, without manually moving the bulky concrete test block, reducing the physical labor of the test personnel and improving the test efficiency.

[0026] Furthermore, notches are provided on the front and rear sides of the alignment plate, a transverse rod is fixed to each of the notches, the top of the roller assembly is pivotally connected to the transverse rod, and the bottoms of multiple roller assemblies are respectively fixed to the alignment plate by pins; multiple lifting support members that can abut against the top surface of the test bench are installed on the left and right sides of the alignment plate.

[0027] Furthermore, the two ends of the transverse rod are respectively fixed on the two opposite side walls at the top of the notch, and the two opposite side walls at the bottom of the notch are respectively provided with a through hole and a latch fixing hole, and the roller assembly includes:

[0028] A leg, wherein a pivot hole and a latch hole are respectively provided at the top and the bottom of the leg, the transverse rod is arranged through the pivot hole, and one end of the latch passes through the through hole and the latch hole in sequence and then is plugged into the latch fixing hole;

[0029] A roller is pressed into a groove at the bottom end of the leg; a plurality of drag-reducing balls are embedded on the groove wall of the groove, and the plurality of drag-reducing balls are in rolling contact with the roller.

[0030] The beneficial effect of adopting the above technical solution is: when the alignment plate is moved and aligned by the roller assembly, the lifting support does not contact the top of the test bench, which facilitates the movement of the alignment plate. When the point of force of the shear plate on the concrete test block is aligned with the upper jaw position of the testing machine, the lifting support is operated to make the bottom end of the lifting support contact the top of the test bench, and the alignment plate and the concrete test block thereon are lifted together by the lifting support until the roller is no longer in contact with the top of the test bench, and then the pin is pulled out. At this time, the bottom of the leg can move, and the top can swing around the transverse rod. After that, the lifting support is operated to lower the alignment plate until the bottom end surface of the alignment plate is completely in contact with the top surface of the test bench, and at this time, the bottom of the leg can swing to the outside of the notch, and the roller no longer plays a supporting role. In this way, the alignment plate is in full contact with the test bench, avoiding shaking or offset of the alignment plate in contact with the test bench through the roller during subsequent tests, which affects the experimental effect. The setting of the drag-reducing ball can improve the rolling effect of the roller, avoiding the problem of jamming caused by large friction between the roller and the groove, resulting in unsmooth movement of the alignment plate.

[0031] Furthermore, each of the lifting supports comprises:

[0032] A mounting plate, one side of which is fixed to a side wall of the alignment plate;

[0033] A lifting screw rod, the lifting screw rod is arranged through the mounting plate, an upper nut and a lower nut are screwed on the lifting screw rod, and the upper nut and the lower nut are respectively located above and below the mounting plate;

[0034] A support seat, the top end of the support seat is fixedly connected to the lower end of the lifting screw, and the bottom end of the support seat can abut against the top surface of the test bench.

[0035] The beneficial effect of adopting the above technical scheme is: when the alignment plate is moved and aligned using the roller assembly, the support seat does not contact the top of the test bench, which facilitates the movement of the alignment plate. When the fulcrum of the shear plate on the concrete test block is aligned with the upper jaw position of the testing machine, the upper nut and the lower nut are loosened to allow the lifting screw to bring the support seat down so that the support seat is supported on the top surface of the test bench. The lower nut is then rotated to move it upward, thereby lifting the mounting plate, thereby achieving the upward movement of the alignment plate until the roller is no longer in contact with the top of the test bench. The pin is then pulled out. At this time, the bottom of the leg can move, and the top can swing around the transverse rod. Afterwards, the lower nut is rotated to move it downward, thereby causing the alignment plate to fall back until the bottom end surface of the alignment plate is completely in contact with the top surface of the test bench. At this time, the bottom of the leg swings to the outside of the notch, the roller does not play a supporting role, and the alignment plate is fully supported on the test bench.

[0036] Furthermore, a level is installed on the outer peripheral side wall of the alignment plate.

[0037] The beneficial effect of adopting the above technical solution is that when lifting and lowering the alignment plate, a spirit level can be used to observe whether the alignment plate is in a horizontal position, thereby avoiding a large tilt of the alignment plate that affects the alignment of the shear plate's force point with the upper jaw position of the testing machine.

[0038] Furthermore, the clamping tool comprises:

[0039] A clamping screw, wherein the clamping screw is arranged at intervals on both sides of the concrete test block, a slider at the lower end of each clamping screw is placed in a slide groove on the top surface of the test bench, and a clamping nut is threaded on the upper end of each clamping screw;

[0040] A pressing plate, wherein the pressing plates are arranged in two intervals, and the two sides of each pressing plate are respectively penetrated on the corresponding clamping screw, the bottom end surface of the pressing plate is pressed with the top end surface of the concrete test block, and the clamping nut is pressed on the top end surface of the pressing plate;

[0041] A support screw is screwed to the bottom end of the test bench, a clamping rod is fixed to the lower end of the support screw, the lower end of the clamping rod is fixed to the lower jaw of the testing machine, an auxiliary support plate is fixed to the support screw, and the top end of the auxiliary support plate abuts against the bottom end of the test bench.

[0042] The beneficial effect of adopting the above technical solution is that the concrete test block can be pressed onto the alignment plate by the pressing plate, which is convenient for subsequent test operations. In addition, the diameter of the support screw can be fixed, and the clamping rod can be provided with a plurality of clamping rods of different diameters and sizes, so that clamping rods of different specifications can be replaced according to different sizes of lower jaws without replacing the test bench, so that the test bench can be adapted to test machines of different specifications without replacement.

[0043] Furthermore, an extension plate extending out of the testing machine is fixed to a side of the test bench away from the concrete test block, a hook is fixed to the bottom of the extension plate, and a counterweight is hung on the hook.

[0044] The beneficial effect of adopting the above technical solution is that after the shear plate's force point is aligned with the upper jaw position, the heavy concrete test block will be located on one side of the test bench, that is, the weight of this side is increased, while the other side of the test bench is lighter, which may cause the test bench to warp and become unbalanced, affecting the experimental effect. Therefore, the device can ensure the stability of the test bench and the test effect by installing a counterweight on the other side of the test bench where the weight is lighter. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0046] Figure 1 This is a structural schematic diagram of a traditional shear test device provided by the utility model.

[0047] Figure 2 The utility model provides a front view schematic diagram of a test device for shear working load test of embedded grooves.

[0048] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part A in the middle.

[0049] Figure 4 The utility model provides a side structural schematic diagram of a test device for a shear working load test of a pre-buried channel.

[0050] Figure 5 The utility model is a schematic structural diagram of another embodiment of a test device for a shear working load test of a pre-buried channel provided by the utility model. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0052] like Figure 2-Figure 4 The utility model embodiment discloses a test device for a shear working load test of a pre-buried channel, comprising:

[0053] The testing machine 1 has a test table 12 fixed on the lower jaw 11 at the bottom of the testing machine 1.

[0054] A concrete test block 2 is placed on the test bench 12. A groove 21 is provided on one side of the concrete test block 2. Bolts 22 are fixed on the groove 21.

[0055] The shear plate 3 is sleeved on the bolt 22 and is locked and fixed by a locking nut 4;

[0056] A flexible force transmission component 5, one end of which is connected to the upper jaw 13 at the top of the testing machine 1, and the other end of which is connected to the shear plate 3;

[0057] The clamping fixture 6 is installed on the top surface of the test bench 12 and is used to fix the concrete test block 2.

[0058] Among them, in some embodiments, the flexible force transmission component 5 includes:

[0059] An upper sleeve 51, the upper end of which is clamped and fixed on the upper jaw 13;

[0060] A connecting screw 52, ​​the upper end of which is threadedly connected to the lower end of the upper sleeve 51;

[0061] A lower sleeve 53, the upper sleeve opening of which is threadedly connected to the lower end of the connecting screw 52;

[0062] A first flexible chain 54, the upper end of which is connected to the lower end of the lower sleeve 53;

[0063] A metal rod 55, the upper end of the metal rod 55 is connected to the lower end of the first flexible chain 54;

[0064] The second flexible chain 56 , the upper end of the second flexible chain 56 is connected to the lower end of the metal rod 55 , and the lower end of the second flexible chain 56 is connected to the top end of the shear plate 3 .

[0065] A preferred embodiment is that the upper end of the first flexible chain 54 is connected to the lower end of the lower sleeve 53 via a first universal joint 57, the upper end of the metal rod 55 is connected to the lower end of the first flexible chain 54 via a second universal joint 58, the upper end of the second flexible chain 56 is connected to the lower end of the metal rod 55 via a third universal joint 59, and the lower end of the second flexible chain 56 is connected to the top end of the shear plate 3 via a fourth universal joint 60.

[0066] In another embodiment, the test device further comprises an alignment plate 7 , a concrete test block 2 is placed on the top of the alignment plate 7 , and a plurality of roller assemblies 8 are mounted on the alignment plate 7 and in rolling contact with the top surface of the test bench 12 .

[0067] Specifically, notches 701 are provided on the front and rear sides of the alignment plate 7, a transverse rod 9 is fixed to each notch 701, the top of the roller assembly 8 is pivotally connected to the transverse rod 9, and the bottoms of multiple roller assemblies 8 are fixed to the alignment plate 7 by pins 10 respectively; multiple lifting support members 14 that can abut against the top surface of the test bench 12 are installed on the left and right sides of the alignment plate 7.

[0068] The two ends of the transverse rod 9 are respectively fixed on the two opposite side walls at the top of the notch 701, and the two opposite side walls at the bottom of the notch 701 are respectively provided with a through hole 702 and a latch fixing hole 703. The roller assembly 8 includes:

[0069] The leg 81 has a pivot hole 811 and a latch hole 812 at the top and bottom, respectively. The transverse rod 9 is arranged through the pivot hole 811. One end of the latch 10 passes through the through hole 702 and the latch hole 812 in sequence and then plugs into the latch fixing hole 703.

[0070] The roller 82 is press-fitted into the groove 813 at the bottom end of the support leg 81 ; a plurality of drag-reducing balls 83 are embedded on the groove wall of the groove 813 , and the plurality of drag-reducing balls 83 are in rolling contact with the roller 82 .

[0071] Preferably, the latch is a square rod, and the through hole, the latch hole, and the latch fixing hole are all square holes that match the shape of the square rod. In this way, since the latch, the through hole, the latch hole, and the latch fixing hole are all square structures, when the square rod is inserted into the through hole, the latch hole, and the latch fixing hole, it can be ensured that the bottom of the leg will not swing, thereby ensuring that the roller at the bottom of the leg can always be in rolling contact with the top surface of the test bench, thereby ensuring the stability of the movement of the alignment plate.

[0072] Each lifting support 14 comprises:

[0073] A mounting plate 141, one side of the mounting plate 141 is fixed to the side wall of the alignment plate 7;

[0074] A lifting screw rod 142, the lifting screw rod 142 is arranged through the mounting plate 141, an upper nut 143 and a lower nut 144 are screwed on the lifting screw rod 142, and the upper nut 143 and the lower nut 144 are respectively located above and below the mounting plate 141;

[0075] The support seat 145 has a top end fixedly connected to the lower end of the lifting screw rod 142 , and a bottom end of the support seat 145 can abut against the top surface of the test bench 12 .

[0076] Of course, in addition to adopting the structural mode of lifting the support member 14, the alignment plate can also be directly lifted and installed by a crane.

[0077] Level gauges 15 are installed on the outer peripheral side walls of the alignment plate 7 .

[0078] In the above-mentioned embodiment, the clamping tool 6 comprises:

[0079] Clamping screws 61, which are arranged at intervals on both sides of the concrete test block 2. The slider 611 at the lower end of each clamping screw 61 is placed in the slide groove 121 on the top surface of the test bench 12, and the upper end of each clamping screw 61 is threaded with a clamping nut 62;

[0080] The pressing plates 63 are two arranged at intervals, and the two sides of each pressing plate 63 are respectively penetrated on the corresponding clamping screw 61, the bottom end surface of the pressing plate 63 is pressed against the top surface of the concrete test block 2, and the clamping nut 62 is pressed on the top surface of the pressing plate 63;

[0081] A support screw 16 is screwed to the bottom end of the test bench 12, a clamping rod 17 is fixed to the lower end of the support screw 16, the lower end of the clamping rod 17 is fixed to the lower jaw 11 of the testing machine 1, an auxiliary support plate 18 is fixed to the support screw 16, and the top end of the auxiliary support plate 18 abuts against the bottom end of the test bench 12.

[0082] like Figure 5 In another embodiment, an extension plate 23 extending out of the testing machine 1 is fixed to one side of the test bench 12 away from the concrete test block 2, a hook 24 is fixed to the bottom of the extension plate 23, and a counterweight 25 is hung on the hook 24.

[0083] The process of using the device is:

[0084] During the test, the concrete test block is placed on the alignment plate. When the alignment plate is moved and aligned using the roller assembly, the support seat does not contact the top of the test bench, which facilitates the movement of the alignment plate. When the fulcrum of the shear plate on the concrete test block is aligned with the upper jaw position of the testing machine, the upper nut and the lower nut are loosened to allow the lifting screw to bring the support seat down so that the support seat is supported on the top surface of the test bench. The lower nut is then rotated to move it upward, thereby lifting the mounting plate, thereby achieving the upward movement of the alignment plate until the roller is no longer in contact with the top of the test bench. The pin is then pulled out. At this time, the bottom of the leg can move, and the top can swing around the transverse rod. Afterwards, the lower nut is rotated to move it downward, thereby causing the alignment plate to fall back until the bottom end surface of the alignment plate is completely in contact with the top surface of the test bench. At this time, the bottom of the leg swings to the outside of the notch, the roller does not play a supporting role, and the alignment plate is fully supported on the test bench. Then, a flexible force transmission component is connected between the shear plate and the upper jaw. Finally, the loading force device is started to apply a vertical upward loading force, and the corresponding shear resistance test is performed according to the relevant parameters specified in the standard.

[0085] The device changes the traditional compressive stress load into an upward tensile stress load, and connects the upper jaw and the shear plate through a flexible force transmission component, so that the upper jaw and the shear plate are subjected to flexible force transmission. Even if the shear plate is deformed, the upper jaw will not be damaged, thus avoiding the problem of rigid force transmission between the existing loading force device and the shear plate, which causes damage to the upper jaw. In addition, the device uses a movable alignment plate, which can drive the concrete test block on it to move in position, making it easy to align the force point of the shear plate on the concrete test block with the upper jaw position of the testing machine, without the need to manually move the bulky concrete test block, reducing the physical labor of the test personnel and improving the test efficiency.

[0086] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0087] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test device for shear working load test of embedded channel, characterized in that: include: A testing machine (1), wherein a testing table (12) is fixed on a lower jaw (11) at the bottom of the testing machine (1); A concrete test block (2), the concrete test block (2) being placed on the test bench (12), a groove (21) being provided on one side of the concrete test block (2), and a bolt (22) being fixed on the groove (21); A shear plate (3), wherein the shear plate (3) is sleeved on the bolt (22) and is locked and fixed by a locking nut (4); A flexible force transmission component (5), one end of which is connected to the upper jaw (13) at the top of the testing machine (1), and the other end of which is connected to the shear plate (3); A clamping fixture (6), the clamping fixture (6) is installed on the top surface of the test bench (12) and is used to fix the concrete test block (2).

2. A test device for shear working load test of embedded channel according to claim 1, characterized in that: The flexible force transmission component (5) comprises: An upper sleeve (51), the upper end of the upper sleeve (51) being clamped and fixed on the upper jaw (13); A connecting screw (52), the upper end of which is threadedly connected to the lower end of the upper sleeve (51); A lower sleeve (53), the upper sleeve opening of which is threadedly connected to the lower end of the connecting screw (52); A first flexible chain (54), the upper end of the first flexible chain (54) being connected to the lower end of the lower sleeve (53); A metal rod (55), the upper end of the metal rod (55) being connected to the lower end of the first flexible chain (54); A second flexible chain (56), the upper end of the second flexible chain (56) is connected to the lower end of the metal rod (55), and the lower end of the second flexible chain (56) is connected to the top end of the shear plate (3).

3. A test device for shear working load test of embedded channel according to claim 2, characterized in that: The upper end of the first flexible chain (54) is connected to the lower end of the lower sleeve (53) via a first universal joint (57), the upper end of the metal rod (55) is connected to the lower end of the first flexible chain (54) via a second universal joint (58), the upper end of the second flexible chain (56) is connected to the lower end of the metal rod (55) via a third universal joint (59), and the lower end of the second flexible chain (56) is connected to the top end of the shear plate (3) via a fourth universal joint (60).

4. A test device for shear working load test of embedded channel according to any one of claims 1 to 3, characterized in that: It also comprises an alignment plate (7), the concrete test block (2) being placed on the top of the alignment plate (7), and a plurality of roller assemblies (8) being mounted on the alignment plate (7) and in rolling contact with the top surface of the test bench (12).

5. A test device for shear working load test of embedded channel according to claim 4, characterized in that: The alignment plate (7) is provided with notches (701) on both the front and rear sides, and a transverse rod (9) is fixed to each of the notches (701). The top of the roller assembly (8) is pivotally connected to the transverse rod (9), and the bottoms of the plurality of roller assemblies (8) are respectively fixed to the alignment plate (7) by means of latches (10); and a plurality of lifting support members (14) that can abut against the top surface of the test bench (12) are installed on both the left and right sides of the alignment plate (7).

6. A test device for shear working load test of embedded channel according to claim 5, characterized in that: The two ends of the transverse rod (9) are respectively fixed on the two opposite side walls at the top of the notch (701); the two opposite side walls at the bottom of the notch (701) are respectively provided with a through hole (702) and a latch fixing hole (703); the roller assembly (8) comprises: A support leg (81), wherein a pivot hole (811) and a latch hole (812) are respectively provided at the top and the bottom of the support leg (81), the transverse rod (9) is arranged through the pivot hole (811), and one end of the latch (10) passes through the through hole (702) and the latch hole (812) in sequence and then is plugged into the latch fixing hole (703); A roller (82) is pressed into a groove (813) at the bottom end of the support leg (81); a plurality of drag-reducing balls (83) are embedded on the groove wall of the groove (813), and the plurality of drag-reducing balls (83) are in rolling contact with the roller (82).

7. A test device for shear working load test of embedded channel according to claim 5, characterized in that: Each of the lifting supports (14) comprises: A mounting plate (141), one side of the mounting plate (141) being fixed to a side wall of the alignment plate (7); A lifting screw rod (142), the lifting screw rod (142) is arranged through the mounting plate (141), an upper nut (143) and a lower nut (144) are screwed onto the lifting screw rod (142), and the upper nut (143) and the lower nut (144) are respectively located above and below the mounting plate (141); A support seat (145), the top end of the support seat (145) is fixedly connected to the lower end of the lifting screw rod (142), and the bottom end of the support seat (145) can abut against the top surface of the test bench (12).

8. A test device for shear working load test of embedded channel according to any one of claims 5 to 7, characterized in that: A level (15) is installed on the outer peripheral side wall of the alignment plate (7).

9. A test device for shear working load test of embedded channel according to any one of claims 1-3 and 5-7, characterized in that: The clamping tool (6) comprises: A clamping screw (61), wherein the clamping screw (61) is arranged in a plurality at intervals on both sides of the concrete test block (2), a slider (611) at the lower end of each clamping screw (61) is placed in a slide groove (121) on the top surface of the test bench (12), and a clamping nut (62) is screwed onto the upper end of each clamping screw (61); A pressing plate (63), wherein two pressing plates (63) are arranged at intervals, and both sides of each pressing plate (63) are respectively inserted into the corresponding clamping screw (61), the bottom end surface of the pressing plate (63) is pressed against the top end surface of the concrete test block (2), and the clamping nut (62) is pressed onto the top end surface of the pressing plate (63); A support screw (16) is screwed to the bottom end of the test bench (12), a clamping rod (17) is fixed to the lower end of the support screw (16), the lower end of the clamping rod (17) is fixed to the lower jaw (11) of the testing machine (1), an auxiliary support plate (18) is fixed to the support screw (16), and the top end of the auxiliary support plate (18) is in contact with the bottom end of the test bench (12).

10. A test device for shear working load test of embedded channel according to any one of claims 1-3 and 5-7, characterized in that: An extension plate (23) extending out of the testing machine (1) is fixed to a side of the test bench (12) away from the concrete test block (2), and a hook (24) is fixed to the bottom of the extension plate (23), and a counterweight (25) is hung on the hook (24).

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