Jack static load test bench

Abstract

The embodiment of the present invention discloses a jack static load test bench, including an upper crossbeam, a lower crossbeam, a limiter, a vertical pull rod and a force sensor. The test jack and the force sensor are placed between the upper crossbeam and the lower crossbeam. The vertical pull rod connects the upper crossbeam and the lower crossbeam to bear the loading force of the test jack. The limiter is arranged between the upper crossbeam and the lower crossbeam. By changing the connection mode between the limiter and the crossbeam to change the force condition of the limiter and changing the number of vertical pull rods, the bearing capacity of the jack static load test bench can be changed. Therefore, the jack static load test bench of the embodiment of the present invention has a compact structure, light deadweight, convenient installation and adjustment, and a clear load transfer path, and wide applicability.

Description

Technical Field

[0001] The invention relates to the technical field of jack static load testing, and in particular to a jack static load testing platform. Background Art

[0002] In static or dynamic load tests of structural parts such as bridges and floor slabs, jacks are often used to load the tested structural parts to test the mechanical properties of the structural parts. Before the test, the loading capacity of the jacks used in the test needs to be tested, and the static load test bench is a device for testing the loading capacity of the test jacks. Most of the jack static load test benches in the prior art are column-type ordinary steel frame structure test benches designed based on the principle of internal force self-balancing. Cast thick steel plates are used as loading tables to connect with solid round steel columns. The nuts connecting the round steel columns and the loading tables need to be specially made, and the structure is heavy and inconvenient to disassemble and transport. In addition, the test benches in the prior art increase the load-bearing capacity of the test bench by thickening the loading table and thickening the vertical tie rods, which is relatively costly. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides a jack static load test bench, which can adjust the load-bearing capacity of the test bench by adjusting the number of vertical pull rods and changing the preload force on the limiter, thereby having a wider range of load-bearing capacity.

[0004] The jack static load test bench of the embodiment of the present invention comprises:

[0005] A crossbeam, comprising a lower crossbeam and an upper crossbeam arranged in parallel, wherein the test jack is placed between the lower crossbeam and the upper crossbeam;

[0006] at least one stopper, disposed between the lower crossbeam and the upper crossbeam, the stopper being configured to limit the distance between the lower crossbeam and the upper crossbeam;

[0007] at least one vertical tie rod, two ends of which are respectively connected to the lower cross beam and the upper cross beam, and the vertical tie rod is configured to bear the loading force of the test jack; and

[0008] A force sensor is placed between the test jack and the crossbeam, and the force sensor is configured to detect the loading force value of the test jack;

[0009] The load-bearing capacity of the jack static load test bench is configured to be changed by changing the connection mode between the vertical tie rods and the cross beams and the number of the vertical tie rods.

[0010] Preferably, the vertical pull rod is arranged on the outer periphery of the limiting member, and the vertical pull rod is perpendicular to the cross beam.

[0011] Preferably, the limiting member is perpendicular to the crossbeam.

[0012] Preferably, the resultant force centerline of the vertical tie rod, the axis of the upper crossbeam and the axis of the lower crossbeam are configured to coincide with the loading centerline of the test jack.

[0013] Preferably, two ends of the limiting member are fixedly connected to the upper crossbeam and the lower crossbeam respectively, and the limiting member is further configured to withstand the loading force of the test jack.

[0014] Preferably, the vertical tie rod is further configured to apply prestress to the limiting member.

[0015] Preferably, the resultant force centerline of the limiter, the resultant force centerline of the vertical tie rod, the axis of the upper crossbeam and the axis of the lower crossbeam are configured to coincide with the loading centerline of the test jack.

[0016] Preferably, the limiting member is movably connected to the upper crossbeam and / or the lower crossbeam, and the upper crossbeam is further configured to be driven to move by the loading force of the test jack.

[0017] Preferably, the jack static load test bench also includes:

[0018] A positioning member is fixedly connected to at least one of the cross beams, and the positioning member is configured to position the limiting member. The positioning member is also configured to move relatively along the limiting member as the upper cross beam moves.

[0019] Preferably, the cross beam is at least one of a box beam, a steel beam and a casting platform;

[0020] The vertical tie rod is at least one of threaded steel, steel plate, section steel and steel strand;

[0021] The limiting member is at least one of a steel section and a steel pipe.

[0022] The jack static load test bench of the embodiment of the present invention comprises an upper crossbeam, a lower crossbeam, a limiter, a vertical pull rod and a force sensor. The test jack and the force sensor are placed between the upper crossbeam and the lower crossbeam. The vertical pull rod connects the upper crossbeam and the lower crossbeam to bear the loading force of the test jack. The limiter is arranged between the upper crossbeam and the lower crossbeam. By changing the connection mode between the limiter and the crossbeam to change the force condition of the limiter and changing the number of vertical pull rods, the bearing capacity of the jack static load test bench can be changed. Therefore, the jack static load test bench of the embodiment of the present invention has a compact structure, light deadweight, convenient installation and adjustment, and a clear load transfer path, and has wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the jack static load test bench according to an embodiment of the present invention;

[0025] Figure 2 is a front view of a jack static load test bench according to an embodiment of the present invention;

[0026] Figure 3 is a side view of a jack static load test bench according to an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of the installation of the vertical pull rod, the limiter and the lower cross beam of the jack static load test bench according to an embodiment of the present invention;

[0028] Figure 5 It is a schematic diagram of the installation of the lower cross beam and the positioning member of the jack static load test bench according to an embodiment of the present invention;

[0029] Figure 6 It is a schematic diagram of the installation of the upper crossbeam of the jack static load test bench according to an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1-lower beam; 2-upper beam; 3-limiting piece; 4-vertical pull rod; 5-force sensor; 6-test jack; 7-positioning piece; 8-leg; 9-installation hole. DETAILED DESCRIPTION

[0032] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the detailed description of the present invention below, some specific details are described in detail. It is possible for a person skilled in the art to fully understand the present invention without the description of these details. In order to avoid confusing the essence of the present invention, known methods, processes, flows, components and circuits are not described in detail.

[0033] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0034] Unless the context clearly requires otherwise, the words "include", "comprising" and similar words throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, the meaning is "including but not limited to".

[0035] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0036] Unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] For ease of explanation, spatially relative terms such as "inside", "outside", "below", "below", "lower", "above", "upper", etc. are used herein to describe the relationship of one element or feature illustrated in the figures to another element or feature. It will be understood that spatially relative terms may be intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figure is turned over, an element described as being "below" or "below" other elements or features will then be positioned as being "above" the other elements or features. Thus, the example term "below" can include both the orientations of above and below. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0038] Figure 1-3 Schematic diagram of the structure of the jack static load test bench according to an embodiment of the present invention. Figure 1 As shown, the jack static load test bench of this embodiment includes a crossbeam, a force sensor 5, at least one stopper 3 and at least one vertical tie rod 4. The crossbeam includes an upper crossbeam 2 and a lower crossbeam 1 arranged in parallel, and the stopper 3 is arranged between the lower crossbeam 1 and the upper crossbeam 2. Both ends of the vertical tie rod 4 are respectively connected to the lower crossbeam 1 and the upper crossbeam 2, and are used to bear the loading force of the test jack 6.

[0039] Figure 4 FIG. 1 is a schematic diagram of the installation of the vertical pull rod, the limiter and the lower cross beam of the jack static load test bench of this embodiment. Figure 1-4As shown, since the vertical pull rod 4 is configured to bear the tension, a limiter 3 is provided to support the upper cross beam 2, limit the distance between the lower cross beam 1 and the upper cross beam 2, and provide a space for placing the test jack 6 and the force sensor 5 when the test jack 6 is not provided on the test bench or the test jack 6 is not loaded. The limiter 3 can be an independent rod or other structure suitable as a supporting component. When the limiter 3 is an independent rod, the limiter 3 is basically vertically connected to the cross beam. Preferably, the limiter 3 is vertical to the cross beam to obtain a better support effect and can make the length of the limiter 3 shorter, thereby reducing the overall weight of the test bench. The number of limiters 3 can be selected by those skilled in the art according to specific test requirements. Preferably, the number of limiters 3 is an even number, for example, two. When the number of limiters 3 is an even number, the same number of limiters 3 are respectively provided at both ends of the cross beam, and the arrangement positions of the limiters 3 are symmetrical, so that the upper cross beam 2 can be stably supported.

[0040] When the number of limit members 3 is an odd number, the shape of the beam can be set to a corresponding regular polygon, and each limit member 3 can be correspondingly set close to the end point of the regular polygon, or an odd number of limit members 3 can be set in the center of the rectangular beam, and the remaining limit members 3 can be symmetrically set at both ends of the rectangular beam, or other arrangements of the limit members 3 that can balance and support the upper beam 2 can be adopted.

[0041] The vertical rod 4 is substantially perpendicular to the lower cross beam 1 and the upper cross beam 2. The vertical rod 4 may surround the outer periphery of the limit member 3 or be symmetrically arranged at both ends of the cross beam, or be arranged at other positions suitable for providing sufficient reaction force to the test jack 6 during the test.

[0042] The vertical tie rod 4 can be one or a combination of fine rolled threaded steel, steel plate, steel section and steel strand. In this embodiment, the vertical tie rod 4 uses fine rolled threaded steel, which has high strength and can be connected to a connector with corresponding internal threads at will, without the need to process a connection structure separately, and is convenient for connecting to the crossbeam.

[0043] The cross beam can be one or a combination of box beam, steel beam and casting platform. In the present embodiment, the cross beam is selected from steel box beam, which has good overall force bearing performance and light deadweight, and is suitable for bearing the loading force of the test jack 6.

[0044] The lower crossbeam 1 is placed on the ground or on the surface of other stable test bench carriers as a structure to support the test bench and the test jack 6. The upper crossbeam 2 is located directly above the lower crossbeam 1 and is substantially parallel to the lower crossbeam 1. The test jack 6 and the force sensor 5 are placed between the upper crossbeam 2 and the lower crossbeam 1. The upper crossbeam 2 is combined with the vertical tie rod 4 to apply a reaction force to the test jack 6 during the loading process of the test jack 6. The force sensor 5 can be placed on the upper surface of the lower crossbeam 1, and the test jack 6 is placed on the force sensor 5, with the upper part of the test jack 6 in contact with the lower surface of the upper crossbeam 2; the test jack 6 can also be placed on the upper surface of the lower crossbeam 1, and the force sensor 5 is placed on the test jack 6, with the other end of the force sensor 5 in contact with the lower surface of the upper crossbeam 2. The force sensor 5 of this embodiment is arranged below the test jack 6. The model of the force sensor 5 can be selected according to the needs of the test load.

[0045] Figure 5 : is a schematic diagram of the installation of the lower crossbeam and the positioning member of the jack static load test bench of this embodiment, Figure 6 It is a schematic diagram of the installation of the upper crossbeam of the jack static load test bench of this embodiment.

[0046] like Figure 4-6 As shown, in order to facilitate the installation and positioning of the vertical tie rod 4, the upper cross beam 2 and the lower cross beam 1 may be provided with a mounting hole 9 so that the vertical tie rod 4 can pass through, and then the vertical tie rod 4 is connected to the upper cross beam 2 and the lower cross beam 1 by bolts. Optionally, the vertical tie rod 4 is fixed by tightening nuts at the upper surface of the upper cross beam 2 and the lower surface of the lower cross beam 1. After the vertical tie rod 4 is connected to the cross beam, the upper cross beam 2 and the lower cross beam 1 are restricted from moving backwards without supporting the upper cross beam 2, that is, the vertical tie rod 4 does not restrict the upper cross beam 2 and the lower cross beam 1 from moving toward each other, but the limiter 3 restricts the upper cross beam 2 and the lower cross beam 1 from moving toward each other. The positions of the mounting holes 9 of the upper cross beam 2 and the lower cross beam 1 should correspond to each other, so that the vertical tie rod 4 can basically maintain a vertical state with the cross beam after installation, and prevent the vertical tie rod 4 from tilting and contacting the edge of the mounting hole 9 during the test to generate a large shear force, causing the vertical tie rod 4 to be broken, endangering the test safety.

[0047] like Figure 5-6 As shown, in order to facilitate the positioning of the stopper 3, the test bench further includes a positioning member 7. Two sets of positioning members 7 are respectively fixed at corresponding positions on the lower surface of the upper crossbeam 2 and the upper surface of the lower crossbeam 1. The positioning member 7 matches the shape and size of the stopper 3, so that the stopper 3 can only move up and down along the positioning member 7, and will not move along the plane direction of the crossbeam.

[0048] The stopper 3 may be one or a combination of steel and steel pipe. In this embodiment, the stopper 3 is a round steel pipe, which is balanced in force and convenient for use with the positioning member 7 for positioning. The positioning member 7 may be configured as a member similar to a spline shaft, and the round steel pipe may be sleeved outside the positioning member 7 and move up and down along the positioning member 7. Those skilled in the art may configure the positioning member 7 to other shapes suitable for positioning with the stopper 3, such as a cylindrical shape.

[0049] The two ends of the limiter 3 have connecting parts for fixedly connecting with the upper crossbeam 2 and / or the lower crossbeam 1. The specific connection method can be bolt connection, pin connection or other connection methods. Those skilled in the art can set the connection method between the limiter 3 and the crossbeam according to the specific needs of the test load so that the load-bearing capacity of the test bench can meet the needs of the test.

[0050] Specifically, when the test load is small, the limiter 3 can be fixedly connected to the lower beam 1 and the upper beam 2 can be flexibly connected to the limiter 3, that is, when the test jack 6 is loaded, the upper beam 2 can move up and down along the limiter 3 through the positioning member 7, and the loading force of the test jack 6 is actually borne by the vertical tie rod 4. The transmission path of the test load is: test jack 6 - upper beam 2 - vertical tie rod 4 - lower beam 1 - force sensor 5 - test jack 6, realizing the self-balance of the internal force of the system composed of the test jack 6 and the test bench. During the test, the center line of the combined force of the vertical tie rod 4, the axis of the upper beam 2 and the axis of the lower beam 1 should coincide with the loading center line of the test jack 6, so that the test bench is balanced in force and prevented from being damaged by excessive local force. Of course, the limiter 3 can also be fixedly connected to the upper beam 2 and flexibly connected to the lower beam 1, or the limiter 3 can be flexibly connected to both the upper beam 2 and the lower beam 1. Preferably, the limiting member 3 is fixedly connected to the lower cross beam 1 and the upper cross beam 2 is movably connected to the limiting member 3, so that the limiting member 3 can be more stable.

[0051] When the test load is large, the positioning member 7 can be fixedly connected to both the upper beam 2 and the lower beam 1, that is, the upper beam 2, the lower beam 1 and the limit member 3 are interconnected to form a rigid structure as a whole. At the same time, prestress can be applied to the limit member 3 by tightening the nut that fixes the vertical tie rod 4. Therefore, during the test, the loading force of the test jack 6 is actually borne by the limit member 3 and the vertical tie rod 4, which can effectively improve the bearing capacity of the jack static load test bench. The transmission path of the test load is: test jack 6 - upper beam 2 - vertical tie rod 4 and limit member 3 - lower beam 1 - force sensor 5 - test jack 6, which realizes the self-balancing of the internal force of the system composed of the test jack 6 and the test bench. During the test, the center line of the combined force of the limiter 3, the center line of the combined force of the vertical pull rod 4, the axis of the upper beam 2 and the axis of the lower beam 1 should coincide with the loading center line of the test jack 6 to balance the force on the test bench and prevent the test bench from being damaged due to excessive force in some parts.

[0052] Preferably, a large number of mounting holes 9 can be provided on the crossbeam. When the test load is large, the load-bearing capacity of the test bench can be increased by adding vertical pull rods 4 connected to the crossbeam.

[0053] Preferably, the test bench further comprises a leg 8, one end of which can be fixedly connected to the stopper 3 and / or the lower cross beam 1, and the other end of which is connected to the ground, other test bench carriers or other fixed objects, so as to assist the lower cross beam 1 in supporting the test bench, improve the stability of the test bench, and prevent the test bench from tipping over in the thickness direction of the test bench frame composed of the cross beam and the stopper 3. Figure 1-Figure 3 As shown, the leg 8 may include an oblique rod inclined to the ground and the plane of the test bench frame, and a cross bar parallel to the ground. The cross bar is placed on the ground, one end of which is connected to the lower cross beam 1, and the other end is fixedly connected to the oblique rod. The other end of the oblique rod is fixedly connected to the limiter 3. If the limiter 3 is movably connected to the lower cross beam 1, the other end of the oblique rod can be fixedly connected to the lower cross beam 1. As a result, the leg 8 and the test bench frame form a right triangle structure with high stability. Preferably, the legs 8 can be symmetrically arranged on both sides of the plane of the test bench frame, and the legs 8 can also be fixedly connected to the ground by anchor bolts or the like to further improve the stability of the test bench.

[0054] The jack static load test bench of the embodiment of the present invention comprises an upper crossbeam, a lower crossbeam, a limiter, a vertical pull rod and a force sensor. The test jack and the force sensor are placed between the upper crossbeam and the lower crossbeam. The vertical pull rod connects the upper crossbeam and the lower crossbeam to bear the loading force of the test jack. The limiter is arranged between the upper crossbeam and the lower crossbeam. By changing the connection mode between the limiter and the crossbeam to change the force condition of the limiter and changing the number of vertical pull rods, the bearing capacity of the jack static load test bench can be changed. Therefore, the jack static load test bench of the embodiment of the present invention has a compact structure, light deadweight, convenient installation and adjustment, and a clear load transfer path, and has wide applicability.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A jack static load test bench, characterized in that: include: A crossbeam, comprising a lower crossbeam and an upper crossbeam arranged in parallel, wherein the test jack is placed between the lower crossbeam and the upper crossbeam; at least one stopper, disposed between the lower crossbeam and the upper crossbeam, the stopper being configured to limit the distance between the lower crossbeam and the upper crossbeam; at least one vertical tie rod, the two ends of which are respectively connected to the lower cross beam and the upper cross beam, and the vertical tie rod is configured to bear the loading force transmitted by the test jack through the upper cross beam and the lower cross beam, so that the upper cross beam applies a reaction force to the test jack during the loading process of the test jack; A force sensor is placed between the test jack and the crossbeam, and the force sensor is configured to detect the loading force value of the test jack; as well as A positioning member configured to position the limiting member, the positioning member is further configured to move relatively along the limiting member as the upper crossbeam moves, the positioning member includes two groups, and the two groups of positioning members are respectively fixed at positions corresponding to the lower surface of the upper crossbeam and the upper surface of the lower crossbeam; The load-bearing capacity of the jack static load test bench is configured to be changed by changing the connection mode between the limiter and the crossbeam and the number of the vertical tie rods; Changing the load-bearing capacity of the jack static load test bench by changing the connection mode between the limiter and the crossbeam includes: When the test load is less than the first preset value, the limiter is fixedly connected to the lower beam and the upper beam is movably connected to the limiter, so that when the test jack is loaded, the upper beam can move up and down along the limiter through the positioning member, the loading force of the test jack is borne by the vertical pull rod, and the transmission path of the test load is: the test jack The upper crossbeam The vertical pull rod The lower cross beam The force sensor The test jack; When the test load is greater than the second preset value, the positioning member is fixedly connected to the upper beam and the lower beam, the upper beam, the lower beam and the limiting member are connected to each other to form a rigid structure as a whole, the loading force of the test jack is jointly borne by the limiting member and the vertical pull rod, and the transmission path of the test load is: the test jack The upper crossbeam The vertical pull rod and the limiting member The lower cross beam The force sensor The test jack.

2. The jack static load test bench according to claim 1, characterized in that: The vertical pull rod is arranged on the outer periphery of the limiting member, and the vertical pull rod is perpendicular to the cross beam.

3. The jack static load test bench according to claim 2, characterized in that: The limiting member is perpendicular to the crossbeam.

4. The jack static load test bench according to claim 1, characterized in that: The cross beam is at least one of a box beam, a steel beam and a casting platform; The vertical tie rod is at least one of threaded steel, steel plate, section steel and steel strand; The limiting member is at least one of a steel section and a steel pipe.

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