Test device for detecting the connection nodes between truss vertical webs and top chords

Abstract

The present invention relates to the field of building inspection, and discloses a test device for inspecting the connection nodes between the vertical webs and the upper chords of a truss, comprising a positioning seat, a pair of circumferential positioning members provided on the sides of the positioning seat, the circumferential positioning members being capable of applying a rotational force to the upper chord and the vertical webs; a force-bearing seat being provided outside the two circumferential positioning members, a force-applying seat being provided between the force-bearing seats, an adjustable slide rail being installed on the side of the force-bearing seat, a sliding seat being slidably installed inside the adjustable slide rail, and a pressure-applying assembly being provided along the length direction of the adjustable slide rail. In the present invention, the circumferential positioning members are capable of applying a rotational force in a circumferential direction to the upper chord and the vertical webs to simulate the stress conditions of the upper chord and the vertical webs in a torsion state, and the force-applying seats are capable of simultaneously applying pressure to the upper chord and the vertical webs to simulate the stress conditions of the upper chord and the vertical webs under synchronous pressure, thereby improving the comprehensiveness of the inspection results.

Description

Technical Field

[0001] The invention relates to the technical field of building detection, in particular to a test device for detecting connection nodes between truss vertical webs and upper chords. Background Art

[0002] A truss is generally composed of an upper chord, a lower chord, and a web. The connection nodes between the chords and the webs are the key parts of the truss structure. The mechanical properties of the connection nodes are the guarantee of the safety of the truss structure. Therefore, it is necessary to carry out targeted mechanical tests on the truss connection nodes to study and evaluate the node performance. Generally, a jack is used to apply pressure to the main rod to test the performance of the node. However, this test method only simulates the stress condition of the main rod, and the test results are not comprehensive.

[0003] In this regard, the prior art invention patent with publication number CN115014968A provides a highly efficient truss node strength detection device and detection method thereof, which simulates the use of the truss in different environments by folding and stretching the truss in multiple directions.

[0004] The existing strength testing method is performed on the truss as a whole. Although pressure and tension are applied at different positions of the truss, it is impossible to simulate the force on a single structure of the truss, nor can it determine the status of the connection nodes of different structures when they are subjected to unilateral or multi-directional forces. Therefore, it is impossible to simulate the force conditions of the chords and webs. As a result, the force simulation is relatively limited and the test results are not comprehensive. Summary of the Invention

[0005] To this end, the present invention provides a test device for detecting the connection nodes between the vertical webs and the upper chords of a truss, which effectively solves the technical problem in the prior art that it is impossible to simulate the different stress conditions of the chords and webs, resulting in relatively limited stress simulation conditions and incomplete detection results.

[0006] To solve the above technical problems, the present invention specifically provides the following technical solutions: a test device for detecting the connection node between the vertical web and the upper chord of a truss, comprising a positioning seat, through which the end of the upper chord passes and is positioned, and a sensor element is provided at the connection node between the upper chord and the vertical web;

[0007] A pair of circumferential positioning members are provided on the side of the positioning seat, the end of the upper chord member away from the positioning seat passes through and is positioned on one of the circumferential positioning members, and the vertical web member passes through and is positioned on the other circumferential positioning member;

[0008] The circumferential positioning member can rotate to apply a rotational force along the circumferential direction to the upper chord member and the vertical web member;

[0009] A force-bearing seat is provided outside the two circumferential positioning members, and a force-applying seat is provided between the force-bearing seats. Both sides of the force-applying seat abut against the outer walls of the two force-bearing seats. The force-applying seat can move along the direction of the symmetry axis between the two force-bearing seats to simultaneously apply thrust to the upper chord and the vertical web through the two force-bearing seats.

[0010] The side of the force-bearing seat is installed with an adjustable slide rail, a sliding seat is slidably installed in the adjustable slide rail, and the force-bearing seat is rotatably installed on the sliding seat;

[0011] The adjustable slide rail is provided with a pressure component along its length direction, and the pressure component is capable of applying pressure to the sliding seat, so as to apply pressure to the upper chord and the vertical web along the length direction of the adjustable slide rail through the force-bearing seat;

[0012] The adjustable slide rail can rotate and adjust its own length direction to adjust the pressure direction of the pressure component on the upper chord and the vertical web.

[0013] Furthermore, a test platform is installed at the bottom of the positioning seat, a mounting seat is installed on the test platform, and a first hydraulic cylinder is provided on the mounting seat along the direction of the symmetry axis between the two force-bearing seats;

[0014] The output end of the first hydraulic cylinder is connected to the force application seat;

[0015] Wherein, one side of the force-applying seat is parallel to the outer wall of one of the force-receiving seats, and the other side is parallel to the outer wall of the other force-receiving seat.

[0016] Furthermore, the circumferential positioning member includes a mounting nacelle fixedly mounted in the force-bearing seat and a rotating cylinder rotatably arranged in the mounting nacelle;

[0017] The rotating cylinder is provided with a threaded hole, the inner thread of the threaded hole is equipped with a threaded cap, the threaded cap is hollow and allows the upper chord rod and the vertical web rod to pass through, and a positioning spring piece is installed at the bottom of the rotating cylinder, and the positioning spring piece can be retracted inward and tightly attached to the side walls of the upper chord rod and the vertical web rod under the push of the threaded cap;

[0018] Wherein, the upper chord and the vertical web pass through the installation nacelle and the rotating cylinder.

[0019] Furthermore, the positioning spring piece is formed with a conical outer wall near one end of the threaded cap, and an inclined inner groove is provided at a portion of the inner wall of the threaded cap near the positioning spring piece. The conical outer wall is directly opposite to the inclined inner groove. When the threaded cap gradually approaches the positioning spring piece, the conical outer wall slides into the inclined inner groove and, under the push of the inclined inner groove, drives the positioning spring piece to gradually retract inward.

[0020] The end of the threaded cap is connected to a gear ring, and a driving motor is provided in the mounting cylinder cabin. The output end of the driving motor is connected to a gear rod, and the gear rod is engaged with the gear ring. The driving motor drives and drives the gear ring and the threaded cap to rotate through the gear rod.

[0021] Furthermore, the threaded cap is screwed forward in the threaded hole until the positioning spring completely fits against the outer walls of the upper chord and the vertical web, and the rotating cylinder is stationary relative to the mounting nacelle.

[0022] When the threaded cap moves forward until the positioning spring piece completely fits the outer wall of the upper chord rod, the threaded cap cannot move forward any further. Driven by the rotation of the gear rod, the threaded cap and the rotating cylinder rotate as a whole relative to the mounting cylinder cabin to apply a rotational force along the circumferential direction to the upper chord rod and the vertical web rod.

[0023] Furthermore, the outer wall of the force-bearing seat is rotatably mounted on the sliding seat via a rotating shaft;

[0024] The pressure-applying assembly includes a second hydraulic cylinder disposed within the adjustable slide rail;

[0025] The output end of the second hydraulic cylinder is connected to the sliding seat.

[0026] Furthermore, a mounting frame is installed on the test platform, and an adjustment motor is installed on the mounting frame;

[0027] The output end of the adjusting motor is connected to the side wall of the adjustable slide rail, and the adjusting motor drives the adjustable slide rail to rotate to adjust the length direction of the adjustable slide rail.

[0028] Furthermore, the positioning seat is directly opposite to one of the circumferential positioning members.

[0029] Furthermore, a slide groove is provided on the test platform along the opposite direction of the positioning seat and the circumferential positioning member;

[0030] The bottom of the mounting frame corresponding to one of the circumferential positioning members is slidably arranged in the sliding groove.

[0031] Furthermore, the positioning seat includes an upper positioning buckle and a lower positioning buckle, and a through hole for the upper chord rod to pass through is provided between the upper positioning buckle and the lower positioning buckle;

[0032] The upper positioning buckle and the lower positioning buckle are connected by bolts.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] In the present invention, a positioning seat is used to position the end of the upper chord, and a circumferential positioning piece is used to position the other end of the upper chord and the vertical web. The circumferential positioning piece can apply a rotational force in the circumferential direction to the upper chord and the vertical web to simulate the stress conditions of the upper chord and the vertical web in a torsion state. In addition, the force-applying seat can simultaneously apply pressure to the upper chord and the vertical web to simulate the stress conditions of the upper chord and the vertical web under synchronous pressure, thereby increasing the stress simulation conditions and improving the comprehensiveness of the test results.

[0035] Furthermore, the length direction of the adjustable slide rail is adjustable, so that the pressure direction of the pressure component on the upper chord and the vertical web can be adjusted respectively, and the force conditions of the upper chord and the vertical web separately and in different directions can be simulated, making the detection results more comprehensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0037] Figure 1 A schematic structural diagram of a test device for detecting connection nodes between truss vertical webs and top chords provided in an embodiment of the present invention;

[0038] Figure 2 A schematic top view of the structure of a test device for detecting connection nodes between truss vertical webs and top chords provided in an embodiment of the present invention;

[0039] Figure 3 A schematic structural diagram of another perspective of a test device for detecting connection nodes between truss vertical webs and top chords provided in an embodiment of the present invention;

[0040] Figure 4 A schematic side view of the structure of a test device for detecting connection nodes between truss vertical webs and top chords provided in an embodiment of the present invention;

[0041] Figure 5 for Figure 2 Plane section view along the AA direction;

[0042] Figure 6 for Figure 2 Stereoscopic cross-sectional view in the AA direction;

[0043] Figure 7 for Figure 6 Schematic diagram of the enlarged structure of the mid-circumferential positioning part.

[0044] The numbers in the figure represent the following:

[0045] 1. Upper chord; 2. Vertical web; 3. Positioning seat; 4. Circumferential positioning member; 5. Force bearing seat; 6. Force applying seat; 7. Adjustable slide rail; 8. Sliding seat; 9. Pressure applying assembly; 10. Test platform; 11. Mounting seat; 12. First hydraulic cylinder; 13. Rotating shaft; 14. Mounting frame; 15. Adjustment motor; 16. Slideway;

[0046] 31. Upper locating buckle; 32. Lower locating buckle; 33. Bolt;

[0047] 41. Mounting nacelle; 42. Rotating cylinder; 43. Threaded hole; 44. Threaded cap; 45. Positioning spring; 46. Conical outer wall; 47. Inclined inner groove; 48. Gear ring; 49. Drive motor; 410. Gear rod;

[0048] 91. Second hydraulic cylinder. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0050] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the present invention provides a test device for detecting the connection node between the vertical web and the upper chord of a truss, including a positioning seat 3, on which the end of the upper chord 1 passes and is positioned.

[0051] The positioning seat 3 serves to fix the end of the upper chord 1. The positioning seat 3 is composed of an upper positioning buckle 31 and a lower positioning buckle 32. A through hole is provided between the upper positioning buckle 31 and the lower positioning buckle 32 for the upper chord 1 to pass through. The through hole is completely matched with the outer wall of the upper chord 1. The upper positioning buckle 31 and the lower positioning buckle 32 are connected by a bolt 33. By removing the lower bolt 33, the upper positioning buckle 31 can be removed from the lower positioning buckle 32, thereby facilitating the removal of the upper chord 1.

[0052] A sensing element is usually provided at the connection node between the upper chord 1 and the vertical web 2. The sensing element generally adopts a sensor capable of detecting the connection node, such as a strain gauge, a displacement sensor, etc.

[0053] A pair of circumferential positioning members 4 are provided on the side of the positioning seat 3. The end of the upper chord 1 away from the positioning seat 3 passes through and is positioned on one of the circumferential positioning members 4, and the vertical web member 2 passes through and is positioned on the other circumferential positioning member 4. One of the circumferential positioning members 4 is opposite to and parallel to the upper chord 1, and the other circumferential positioning member 4 is opposite to and parallel to the vertical web member 2.

[0054] The circumferential positioning member 4 can rotate to apply a rotational force along the circumferential direction to the upper chord 1 and the vertical web 2, that is, to apply a torsional force to the upper chord 1 and the vertical web 2, so as to facilitate the simulation of the situation where the upper chord 1 and the vertical web 2 are subjected to torsional force.

[0055] A force-bearing seat 5 is provided outside the two circumferential positioning members 4, and a force-applying seat 6 is provided between the force-bearing seats 5. Both sides of the force-applying seat 6 abut against the outer walls of the two force-bearing seats 5. The force-applying seat 6 can move along the direction of the symmetry axis between the two force-bearing seats 5 to simultaneously apply thrust to the upper chord 1 and the vertical web 2 through the two force-bearing seats 5;

[0056] Among them, the side of the force-bearing seat 5 is installed with an adjustable slide rail 7, and a sliding seat 8 is slidably installed in the adjustable slide rail 7, and the force-bearing seat 5 is rotatably installed on the sliding seat 8;

[0057] The adjustable slide rail 7 is provided with a pressure component 9 along its length direction, and the pressure component 9 can apply pressure to the sliding seat 8 to apply pressure to the upper chord member 1 and the vertical web member 2 along the length direction of the adjustable slide rail 7 through the force bearing seat 5;

[0058] The adjustable slide rail 7 can rotate and adjust its own length direction to adjust the pressure direction of the pressure component 9 on the upper chord 1 and the vertical web 2.

[0059] In the present invention, the end of the upper chord 1 is positioned by using the positioning seat 3, and the other end of the upper chord 1 and the vertical web 2 are respectively positioned by the circumferential positioning member 4. The circumferential positioning member 4 can apply a rotational force along the circumferential direction to the upper chord 1 and the vertical web 2 to simulate the stress conditions of the upper chord 1 and the vertical web 2 in a torsion state. In addition, the force-applying seat 6 can simultaneously apply pressure to the upper chord 1 and the vertical web 2 to simulate the stress conditions of the upper chord 1 and the vertical web 2 under synchronous pressure, thereby increasing the force simulation conditions and improving the comprehensiveness of the detection results.

[0060] In addition, the length direction of the adjustable slide rail 7 is adjustable, so that the pressure direction of the pressure component 9 on the upper chord rod 1 and the vertical web rod 2 can be adjusted respectively, and the force conditions of the upper chord rod 1 and the vertical web rod 2 alone and in different directions can be simulated, making the detection results more comprehensive.

[0061] The present invention has three different simulations of stress conditions. The first is a simulation of a stress condition in which a torsional force is applied along the circumferential direction of the upper chord 1 and the vertical web 2. The second is a simulation of a stress condition in which forces are applied to the upper chord 1 and the vertical web 2 at the same time. The third is a simulation of a stress condition in which forces in different directions are applied to the upper chord 1 and the vertical web 2 separately.

[0062] In order to realize the second type of stress simulation in which forces are simultaneously applied to the upper chord 1 and the vertical web 2, the present invention applies pressure to the upper chord 1 and the vertical web 2 at the same time through the force-applying seat 6. Specifically, a test platform 10 is installed at the bottom of the positioning seat 3, and a mounting seat 11 is installed on the test platform 10. A first hydraulic cylinder 12 is provided on the mounting seat 11 along the direction of the symmetry axis between the two force-bearing seats 5. The output end of the first hydraulic cylinder 12 is connected to the force-applying seat 6. The first hydraulic cylinder 12 drives the force-applying seat 6 forward and applies force to the upper chord 1 and the vertical web 2 at the same time.

[0063] Among them, one side of the force-applying seat 6 is parallel to the outer wall of one of the force-bearing seats 5, and the other side is parallel to the outer wall of the other force-bearing seat 5. Taking the upper chord 1 as a horizontal state and the vertical web 2 as an example, when the force-applying seat 6 moves along the direction of the symmetry axis between the two force-bearing seats 5, an upward force is applied to the upper chord 1 and an oblique downward force is applied to the vertical web 2 by extrusion, thereby realizing the simulation of the force situation in which the upper chord 1 and the vertical web 2 are subjected to synchronous force.

[0064] In order to simulate the first stress condition of applying a torsional force along the circumferential direction of the upper chord 1 and the vertical web 2, the circumferential positioning member 4 of the present invention can rotate to apply a rotational force along the circumferential direction to the upper chord 1 and the vertical web 2. Specifically, the circumferential positioning member 4 is installed outside the upper chord 1, such as Figure 5 、 Figure 6 and Figure 7 As shown, the circumferential positioning member 4 includes a mounting nacelle 41 fixedly mounted in the force bearing seat 5 and a rotating cylinder 42 rotatably disposed in the mounting nacelle 41;

[0065] A threaded hole 43 is provided on the rotating cylinder 42. A threaded cap 44 is installed on the inner thread of the threaded hole 43. The threaded cap 44 is hollow and allows the upper chord 1 to pass through. A positioning spring 45 is installed at the bottom of the rotating cylinder 42. The positioning spring 45 can be retracted inwardly and tightly attached to the side wall of the upper chord 1 under the push of the threaded cap 44.

[0066] The upper chord 1 passes through the installation nacelle 41 and the rotating cylinder 42 .

[0067] In the initial state, the positioning spring piece 45 is far away from the upper chord rod 1 . Pushed by the threaded cap 44 , the elastic positioning spring piece 45 can gradually retract and cling to the side wall of the upper chord rod 1 .

[0068] The positioning spring piece 45 is formed with a tapered outer wall 46 near one end of the threaded cap 44. The inner wall of the threaded cap 44 near the positioning spring piece 45 is provided with an inclined inner groove 47. The tapered outer wall 46 is directly opposite the inclined inner groove 47. When the threaded cap 44 gradually approaches the positioning spring piece 45, the tapered outer wall 46 slides into the inclined inner groove 47 and, under the push of the inclined inner groove 47, drives the positioning spring piece 45 to gradually retract inward.

[0069] The end of the threaded cap 44 is connected to a gear ring 48, and a drive motor 49 is provided in the mounting nacelle 41. The output end of the drive motor 49 is connected to a gear rod 410, which engages with the gear ring 48. The drive motor 49 drives and drives the gear ring 48 through the gear rod 410, thereby driving the threaded cap 44 to rotate.

[0070] The threaded cap 44 is screwed forward in the threaded hole 43 until the positioning spring 45 is completely in contact with the outer wall of the upper chord 1, and the rotating cylinder 42 is stationary relative to the installation cylinder nacelle 41;

[0071] When the threaded cap 44 moves forward until the positioning spring piece 45 completely fits the outer wall of the upper chord 1, the threaded cap 44 cannot move forward. Driven by the rotation of the gear rod 410, the threaded cap 44 and the rotating cylinder 42 rotate as a whole relative to the mounting cylinder cabin 41 to apply a rotational force along the circumferential direction to the upper chord 1 and the vertical web 2.

[0072] Among them, the resistance encountered by the threaded cap 44 before it spirals forward in the threaded hole 43 until the positioning spring piece 45 completely fits the outer wall of the upper chord rod 1 is less than the friction force of the rotating cylinder 42 relative to the mounting cylinder nacelle 41. That is to say, when the gear rod 410 drives the gear ring 48 to rotate, the threaded cap 44 is easier to spiral forward in the threaded hole 43 than the rotating cylinder 42 rotates relative to the mounting cylinder nacelle 41. When the threaded cap 44 advances until the positioning spring piece 45 completely fits the outer wall of the upper chord rod 1 and the threaded cap 44 can no longer move forward, there will be no relative rotation between the threaded cap 44 and the rotating cylinder 42. When the threaded cap 44 itself continues to rotate, it can only drive the rotating cylinder 42 to rotate relative to the mounting cylinder nacelle 41, thereby applying a rotational force along the circumferential direction to the upper chord rod 1.

[0073] As another embodiment of the present invention:

[0074] The circumferential positioning member 4 is installed outside the vertical web member 2. The circumferential positioning member 4 includes a mounting nacelle 41 fixedly installed in the force bearing seat 5 and a rotating cylinder 42 rotatably arranged in the mounting nacelle 41.

[0075] A threaded hole 43 is provided on the rotating cylinder 42. A threaded cap 44 is installed on the inner thread of the threaded hole 43. The threaded cap 44 is hollow and allows the vertical web 2 to pass through. A positioning spring 45 is installed at the bottom of the rotating cylinder 42. The positioning spring 45 can be retracted inward and tightly attached to the side wall of the vertical web 2 under the push of the threaded cap 44.

[0076] The vertical web member 2 passes through the installation nacelle 41 and the rotating cylinder 42 .

[0077] In the initial state, the positioning spring piece 45 is far away from the vertical web bar 2 . Pushed by the threaded cap 44 , the elastic positioning spring piece 45 can gradually retract and cling to the side wall of the vertical web bar 2 .

[0078] The positioning spring piece 45 is formed with a tapered outer wall 46 near one end of the threaded cap 44. The inner wall of the threaded cap 44 near the positioning spring piece 45 is provided with an inclined inner groove 47. The tapered outer wall 46 is directly opposite the inclined inner groove 47. When the threaded cap 44 gradually approaches the positioning spring piece 45, the tapered outer wall 46 slides into the inclined inner groove 47 and, under the push of the inclined inner groove 47, drives the positioning spring piece 45 to gradually retract inward.

[0079] The end of the threaded cap 44 is connected to a gear ring 48, and a drive motor 49 is provided in the mounting nacelle 41. The output end of the drive motor 49 is connected to a gear rod 410, which engages with the gear ring 48. The drive motor 49 drives and drives the gear ring 48 through the gear rod 410, thereby driving the threaded cap 44 to rotate.

[0080] The threaded cap 44 is screwed forward in the threaded hole 43 until the positioning spring 45 is completely in contact with the outer wall of the vertical web 2, and the rotating cylinder 42 is stationary relative to the installation cylinder nacelle 41;

[0081] When the threaded cap 44 moves forward until the positioning spring piece 45 completely fits the outer wall of the vertical web member 2, the threaded cap 44 cannot move forward. Driven by the rotation of the gear rod 410, the threaded cap 44 and the rotating cylinder 42 rotate as a whole relative to the installation cylinder cabin 41 to apply a rotational force along the circumferential direction to the vertical web member 2.

[0082] Among them, the resistance encountered by the threaded cap 44 before it spirals forward in the threaded hole 43 until the positioning spring piece 45 completely fits the outer wall of the vertical web bar 2 is less than the friction force of the rotating cylinder 42 relative to the mounting cylinder 41. That is to say, when the gear rod 410 drives the gear ring 48 to rotate, the threaded cap 44 is easier to spiral forward in the threaded hole 43 than the rotating cylinder 42 rotates relative to the mounting cylinder 41. When the threaded cap 44 advances until the positioning spring piece 45 completely fits the outer wall of the vertical web bar 2 and the threaded cap 44 can no longer move forward, there will be no relative rotation between the threaded cap 44 and the rotating cylinder 42. When the threaded cap 44 itself continues to rotate, it can only drive the rotating cylinder 42 to rotate relative to the mounting cylinder 41, thereby applying a rotational force along the circumferential direction to the vertical web bar 2.

[0083] The above design of the circumferential positioning member 4 can simulate the stress conditions under which the torsional force is applied to the upper chord 1 and the vertical web 2 respectively.

[0084] In order to realize the third type of stress simulation in which forces in different directions are applied to the upper chord 1 and the vertical web 2 separately, the present invention makes the following design: the outer wall of the force-bearing seat 5 is rotatably mounted on the sliding seat 8 through the rotating shaft 13, and the pressure-applying assembly 9 includes a second hydraulic cylinder 91 arranged in the adjustable slide rail 7, and the output end of the second hydraulic cylinder 91 is connected to the sliding seat 8.

[0085] The second hydraulic cylinder 91 can apply force to the sliding seat 8 , thereby applying force to the force-bearing seat 5 along the length direction of the adjustable slide rail 7 .

[0086] In order to further adjust the direction of the force applied to the upper chord 1 and the vertical web 2, the present invention also makes the following design, such as Figure 3 As shown, a mounting frame 14 is mounted on the test platform 10, and an adjustment motor 15 is mounted on the mounting frame 14;

[0087] The output end of the adjusting motor 15 is connected to the side wall of the adjustable slide rail 7 , and the adjusting motor 15 drives the adjustable slide rail 7 to rotate to adjust the length direction of the adjustable slide rail 7 .

[0088] The positioning seat 3 is opposite to one of the circumferential positioning members 4 to position the upper chord 1. Taking the upper chord 1 as an example in a horizontal state, the positioning seat 3 and its corresponding circumferential positioning member 4 are both in a horizontal state.

[0089] In addition, in order to facilitate the installation of the upper chord 1 and the vertical web 2, the present invention makes the following design: a slide groove 16 is provided on the test platform 10 in the direction opposite to the positioning seat 3 and the circumferential positioning member 4, and the bottom of the mounting frame 14 corresponding to one of the circumferential positioning members 4 is slidably set in the slide groove 16.

[0090] During the installation process, the vertical web members 2 of the truss are first placed into the circumferential positioning members 4, and then the upper chord 1 is fixed by the positioning seat 3. At this time, the mounting frame 14 is driven to slide, so that the circumferential positioning members 4 in the horizontal state are gradually sleeved on the outside of the end of the upper chord 1, and then the positioning between the circumferential positioning members 4 and the upper chord 1 and the vertical web members 2 is achieved by driving the motor 49.

[0091] In summary, the main implementation process of the present invention is:

[0092] 1. Simulation of the stress conditions when torsional force is applied along the circumferential direction of the upper chord 1 and the vertical web 2:

[0093] After the upper chord 1 and the vertical web 2 are installed, in one of the circumferential positioning members 4, the driving motor 49 is used to drive the threaded cap 44 to spirally advance in the threaded hole 43 until the positioning spring 45 is completely in contact with the outer wall of the upper chord 1. The rotating cylinder 42 remains stationary. When the threaded cap 44 advances until the positioning spring 45 is completely in contact with the outer wall of the upper chord 1, the upper chord 1 is positioned and the threaded cap 44 cannot advance further. Driven by the rotation of the gear rod 410, the threaded cap 44 and the rotating cylinder 42 rotate as a whole relative to the installation cylinder 41, thereby applying a rotational force in the circumferential direction to the upper chord 1.

[0094] In another circumferential positioning member 4, a driving motor 49 is used to drive the threaded cap 44 to spirally advance in the threaded hole 43 until the positioning spring piece 45 is completely in contact with the outer wall of the vertical web member 2. The rotating cylinder 42 does not move. When the threaded cap 44 advances until the positioning spring piece 45 is completely in contact with the outer wall of the vertical web member 2, the positioning of the vertical web member 2 is achieved, and the threaded cap 44 cannot move forward. Driven by the rotation of the gear rod 410, the threaded cap 44 and the rotating cylinder 42 rotate as a whole relative to the mounting barrel 41 to apply a rotational force along the circumferential direction to the vertical web member 2.

[0095] 2. Simulate the stress conditions of applying forces to the upper chord 1 and the vertical web 2 at the same time:

[0096] The first hydraulic cylinder 12 drives the force-applying seat 6 to move forward and simultaneously applies force to the upper chord member 1 and the vertical web member 2, exerting an upward force on the upper chord member 1 and an oblique downward force on the vertical web member 2 by squeezing;

[0097] 3. Simulation of the stress conditions when forces in different directions are applied to the upper chord 1 and the vertical web 2 separately:

[0098] The adjusting motor 15 drives the adjustable slide rail 7 to rotate to adjust the length direction of the adjustable slide rail 7;

[0099] After adjusting the length direction of the adjustable slide rail 7, the second hydraulic cylinder 91 can apply force to the sliding seat 8, thereby applying force to the force-bearing seat 5 along the length direction of the adjustable slide rail 7, thereby applying force to the upper chord rod 1 along the length direction of the adjustable slide rail 7 and applying force to the vertical web rod 2 along the length direction of the adjustable slide rail 7.

[0100] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. A test device for detecting the connection nodes between truss vertical webs and top chords, characterized in that: It comprises a positioning seat (3), and the end of the upper chord (1) passes through and is positioned on the positioning seat (3); A pair of circumferential positioning members (4) are provided on the side of the positioning seat (3); the end of the upper chord (1) away from the positioning seat (3) passes through and is positioned on one of the circumferential positioning members (4); and the vertical web member (2) passes through and is positioned on the other circumferential positioning member (4); The circumferential positioning member (4) is capable of self-rotation to apply a rotational force along the circumferential direction to the upper chord member (1) and the vertical web member (2); A force-bearing seat (5) is provided outside the two circumferential positioning members (4), and a force-applying seat (6) is provided between the force-bearing seats (5). Both sides of the force-applying seat (6) abut against the outer walls of the two force-bearing seats (5), and the force-applying seat (6) can move along the direction of the symmetry axis between the two force-bearing seats (5) to simultaneously apply thrust to the upper chord (1) and the vertical web (2) through the two force-bearing seats (5); Wherein, an adjustable slide rail (7) is installed on the side of the force-bearing seat (5), a sliding seat (8) is slidably installed in the adjustable slide rail (7), and the force-bearing seat (5) is rotatably installed on the sliding seat (8); The adjustable slide rail (7) is provided with a pressure component (9) along its length direction, and the pressure component (9) is capable of applying pressure to the sliding seat (8) to apply pressure to the upper chord (1) and the vertical web (2) through the force-bearing seat (5) along the length direction of the adjustable slide rail (7); The adjustable slide rail (7) is capable of self-rotation and adjusting its own length direction to adjust the pressure direction of the pressure component (9) on the upper chord (1) and the vertical web (2).

2. The test device for detecting the connection nodes between truss vertical webs and top chords according to claim 1, characterized in that: A test platform (10) is installed at the bottom of the positioning seat (3), a mounting seat (11) is installed on the test platform (10), and a first hydraulic cylinder (12) is provided on the mounting seat (11) along the direction of the symmetry axis between the two force-bearing seats (5); The output end of the first hydraulic cylinder (12) is connected to the force application seat (6); One side of the force-applying seat (6) is parallel to the outer wall of one of the force-receiving seats (5), and the other side is parallel to the outer wall of the other force-receiving seat (5).

3. The test device for detecting the connection nodes between truss vertical webs and top chords according to claim 1, characterized in that: The circumferential positioning member (4) includes a mounting nacelle (41) fixedly mounted in the force bearing seat (5), and a rotating cylinder (42) rotatably disposed in the mounting nacelle (41); The rotating cylinder (42) is provided with a threaded hole (43), the threaded hole (43) is internally threaded with a threaded cap (44), the threaded cap (44) is hollow and is for the upper chord rod (1) and the vertical web rod (2) to pass through, and a positioning spring piece (45) is installed at the bottom of the rotating cylinder (42), and the positioning spring piece (45) can be retracted inwardly and closely attached to the side walls of the upper chord rod (1) and the vertical web rod (2) under the push of the threaded cap (44); Wherein, the upper chord (1) and the vertical web (2) pass through the installation nacelle (41) and the rotating cylinder (42).

4. The test device for detecting the connection nodes between truss vertical webs and top chords according to claim 3, characterized in that: The positioning spring piece (45) is formed with a conical outer wall (46) near one end of the threaded cap (44), and an inclined inner groove (47) is provided at a portion of the inner wall of the threaded cap (44) near the positioning spring piece (45). The conical outer wall (46) is directly opposite to the inclined inner groove (47). When the threaded cap (44) gradually approaches the positioning spring piece (45), the conical outer wall (46) slides into the inclined inner groove (47) and, under the push of the inclined inner groove (47), drives the positioning spring piece (45) to gradually retract inward. The end of the threaded cap (44) is connected to a gear ring (48), a driving motor (49) is provided in the mounting nacelle (41), an output end of the driving motor (49) is connected to a gear rod (410), the gear rod (410) is engaged with the gear ring (48), and the driving motor (49) drives and drives the gear ring (48) and the threaded cap (44) to rotate through the gear rod (410).

5. The test device for detecting the connection nodes between truss vertical webs and top chords according to claim 4, characterized in that: The threaded cap (44) is screwed forward in the threaded hole (43) until the positioning spring (45) is completely in contact with the outer wall of the upper chord (1) and the vertical web (2), and the rotating cylinder (42) is stationary relative to the mounting cylinder cabin (41); When the threaded cap (44) advances until the positioning spring (45) completely fits the outer wall of the upper chord (1), the threaded cap (44) cannot continue to advance, and driven by the rotation of the gear rod (410), the threaded cap (44) and the rotating cylinder (42) rotate as a whole relative to the mounting cylinder cabin (41), so as to apply a rotational force along the circumferential direction to the upper chord (1) and the vertical web rod (2).

6. The test device for detecting the connection nodes between truss vertical webs and top chords according to claim 2, characterized in that: The outer wall of the force bearing seat (5) is rotatably mounted on the sliding seat (8) via a rotating shaft (13); The pressure-applying assembly (9) includes a second hydraulic cylinder (91) disposed within the adjustable slide rail (7); The output end of the second hydraulic cylinder (91) is connected to the sliding seat (8).

7. The test device for detecting the connection nodes between truss vertical webs and top chords according to claim 6, characterized in that: A mounting frame (14) is installed on the test platform (10), and an adjustment motor (15) is installed on the mounting frame (14); The output end of the adjusting motor (15) is connected to the side wall of the adjustable slide rail (7), and the adjusting motor (15) drives the adjustable slide rail (7) to rotate to adjust the length direction of the adjustable slide rail (7).

8. The test device for detecting the connection nodes between truss vertical webs and top chords according to claim 7, characterized in that: The positioning seat (3) is directly opposite to one of the circumferential positioning members (4).

9. The test device for detecting the connection nodes between truss vertical webs and top chords according to claim 8, characterized in that: A sliding groove (16) is provided on the test platform (10) along the direction facing the positioning seat (3) and the circumferential positioning member (4); The bottom of the mounting frame (14) corresponding to one of the circumferential positioning members (4) is slidably disposed in the sliding groove (16).

10. The test device for detecting the connection nodes between truss vertical webs and top chords according to claim 1, characterized in that: The positioning seat (3) comprises an upper positioning buckle (31) and a lower positioning buckle (32), and a through hole for the upper chord rod (1) to pass through is provided between the upper positioning buckle (31) and the lower positioning buckle (32); The upper positioning buckle (31) and the lower positioning buckle (32) are connected via a bolt (33).

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