Mechanical four-way bending moment testing device

Abstract

The utility model relates to the technical field of testing, in particular to a mechanical four-way bending moment testing device which comprises a suspension and a base, a loading plate is fixedly installed at the lower end of the suspension, a lower fixing table used for bearing a four-way workpiece is fixedly installed on the base, and a driving motor is fixedly installed on the loading plate. And an upper fixing table which corresponds to the lower fixing table and is used for pressing the four-way workpiece is arranged on the loading plate through a driving motor, and a testing pressure gauge used for testing the bending moment is fixedly mounted on the upper fixing table. The suspension and the base are respectively provided with the upper fixing table and the lower fixing table, and the loading plate is arranged on the suspension, so that a four-way workpiece positioned on the lower fixing table is limited and fixed; the upper groove and the lower groove are formed in the upper fixing table and the lower fixing table respectively so that the four-way workpiece can be limited in a matched mode, and meanwhile the testing pressure gauge is arranged in the upper fixing table so that stable bending moment testing can be conducted on the four-way workpiece.

Description

Technical Field

[0001] The utility model relates to the technical field of testing, in particular to a mechanical four-way bending moment testing device. Background Art

[0002] The mechanical cross has the same function as the common tee. It is mainly divided into grooved mechanical cross and threaded mechanical cross. It can be used to directly connect branch pipes on steel pipes. It is widely used in the installation of fire protection pipes and sprinkler pipes. Mechanical cross can be used when diversion or confluence is required. In order to ensure the structural strength and safety of the mechanical cross, it must be subjected to bending moment test under the existing conditions.

[0003] At present, a bending moment test fixture such as the one disclosed in announcement number CN220671166U is widely used, which can simplify the clamp bending moment test process, reduce the required equipment and personnel, and improve the accuracy and consistency of the test. However, it lacks suitable limiting measures for the four-way workpiece, which makes it very easy for the four-way workpiece to shift its position during the bending moment test. In this way, it is impossible to ensure that the four-way workpiece can be stably stressed, which seriously affects the accuracy of the bending moment test. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that it is difficult to fix a four-way workpiece and affects the accuracy of the bending moment test, and proposes a mechanical four-way bending moment test device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A mechanical four-way bending moment testing device comprises a suspension and a base, wherein a load plate is fixedly mounted on the lower end of the suspension, a lower fixed platform for carrying a four-way workpiece is fixedly mounted on the base, a driving motor is fixedly mounted on the load plate, and an upper fixed platform corresponding to the lower fixed platform and used to press the four-way workpiece is arranged on the load plate through the driving motor, and a test pressure gauge for testing the bending moment is fixedly mounted on the upper fixed platform.

[0007] Preferably, the suspension, load plate, upper and lower fixed platforms, and base are arranged in sequence from top to bottom, and the lower and upper fixed platforms are respectively provided with a lower groove and an upper groove for fitting a four-way workpiece.

[0008] Preferably, four guide columns are fixedly connected between the load plate and the lower fixed platform, and guide through holes for slidably sleeved the guide columns are opened in the upper fixed platform.

[0009] Preferably, the lower end of the load plate is integrally connected to a limiting bracket, and a ball screw fixedly connected to the output end of the drive motor is rotatably installed between the load plate and the limiting bracket, a lifting nut is matched with the ball screw, the pin shaft at the lower end of the load plate is connected to a tensioning and closing connecting rod movably pulled by the lifting nut, a limiting groove is provided in the upper fixed platform, and a limiting slider connected to the pin shaft of the tensioning and closing connecting rod is slidably installed in the limiting groove.

[0010] Preferably, the lifting nut is integrally connected with a limiting rod which slides through the limiting bracket.

[0011] Preferably, a traction rod is pin-connected between the lifting nut and the tensioning and closing connecting rod.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. The utility model utilizes a suspension and a base to respectively set an upper fixed platform and a lower fixed platform, and a load plate is arranged on the suspension, and a driving motor is used to drive the ball screw to rotate, so that the traction connecting rod and the opening and closing connecting rod adjusted with the movement of the lifting nut drive the upper fixed platform to move up and down, thereby limiting and fixing the four-way workpiece located on the lower fixed platform.

[0014] 2. The utility model provides an upper groove and a lower groove in the upper fixing platform and the lower fixing platform respectively to fit and limit the four-way workpiece, and at the same time, a test pressure gauge is arranged in the upper fixing platform to perform a stable bending moment test on the four-way workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the mechanical four-way bending moment testing device proposed by the utility model;

[0016] Figure 2 This is a bottom view of the mechanical four-way bending moment testing device proposed by the utility model;

[0017] Figure 3 It is a cross-sectional view of the mechanical four-way bending moment testing device proposed by the utility model;

[0018] Figure 4 This is an enlarged schematic diagram of the structure of part A of the mechanical four-way bending moment test device proposed by the utility model;

[0019] Figure 5 This is a schematic diagram of the four-way workpiece structure.

[0020] In the figure: 1. suspension; 2. base; 3. load plate; 4. lower fixed platform; 401, lower groove; 5. drive motor; 6. upper fixed platform; 601, upper groove; 7. test pressure gauge; 8. guide column; 9. guide through hole; 10. limit bracket; 11. ball screw; 12. lifting nut; 13. limit rod; 14. opening and closing connecting rod; 15. limit groove; 16. limit slider; 17. traction rod. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-Figure 5 The mechanical four-way bending moment testing device comprises a suspension 1 and a base 2. A load plate 3 is fixedly installed at the lower end of the suspension 1. A lower fixed platform 4 for carrying a four-way workpiece is fixedly installed on the base 2. It should be noted that the suspension 1 is fixedly installed on the roof of the building, the base 2 is fixedly installed on the ground of the building, and the four-way workpiece is horizontally placed on the lower fixed platform 4.

[0023] A driving motor 5 is fixedly installed on the load plate 3, and an upper fixed platform 6 corresponding to the lower fixed platform 4 and used to press the four-way workpiece is provided on the load plate 3 through the driving motor 5. The upper fixed platform 6 is driven by vertical lifting to facilitate placing the four-way workpiece on the lower fixed platform 4 and limiting and fixing the four-way workpiece.

[0024] Please refer to the instruction manual for details Figure 3 With attached Figure 4 The lower end of the load plate 3 is integrally connected to a limiting bracket 10, and a ball screw 11 fixedly connected to the output end of the drive motor 5 is rotatably installed between the load plate 3 and the limiting bracket 10, and a lifting nut 12 is matched with the ball screw 11. The pin shaft at the lower end of the load plate 3 is connected to a tensioning and closing link 14 that is movably pulled by the lifting nut 12. A limiting groove 15 is provided in the upper fixed platform 6, and a limiting slider 16 connected to the pin shaft of the tensioning and closing link 14 is slidably installed in the limiting groove 15. Under the driving action of the lifting nut 12, the traction link 17 pulls and squeezes the tensioning and closing link 14 to drive the limiting slider 16 to move horizontally, thereby driving the upper fixed platform 6 to move vertically downward, and the upper groove 601 and the lower groove 401 are used to limit and fix the four-way workpiece.

[0025] The upper fixed platform 6 is fixedly installed with a test pressure gauge 7 for testing bending moment. The four-way workpiece is placed between the lower fixed platform 4 and the upper fixed platform 6, and a torque is applied to the four-way workpiece according to standard specifications. The required pressure is read from the test pressure gauge 7.

[0026] The suspension 1, the load plate 3, the upper fixed platform 6 and the lower fixed platform 4, and the base 2 are arranged in sequence from top to bottom. The lower fixed platform 4 and the upper fixed platform 6 are respectively provided with a lower groove 401 and an upper groove 601 for fitting the four-way workpiece. It is further explained that the upper groove 601 and the lower groove 401 are corresponding cross-shaped structures to facilitate the snap-on fixation of the four-way workpiece.

[0027] It is worth mentioning that four guide columns 8 are fixedly connected between the load plate 3 and the lower fixed platform 4, and a guide through hole 9 for slidingly sleeve the guide column 8 is opened in the upper fixed platform 6. The upper fixed platform 6 is vertically lifted and lowered under the drive of the drive motor 5, and the guide column 8 is used to provide a guiding and limiting function for the lifting and moving upper fixed platform 6 to ensure that the upper fixed platform 6 is lifted and lowered smoothly corresponding to the lower fixed platform 4.

[0028] The lifting nut 12 is integrally connected with a limiting rod 13 which slides through the limiting bracket 10 , so as to ensure that the lifting nut 12 can only be lifted and moved in the vertical direction.

[0029] A traction rod 17 is pin-connected between the lifting nut 12 and the opening and closing connecting rod 14 , and the lifting nut 12 is used to pull and drive the opening and closing connecting rod 14 .

[0030] It should be noted that the specific model and specifications of the drive motor 5 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it is not repeated here.

[0031] The functional principle of the utility model can be explained through the following operation modes:

[0032] Place the cross-piece in the lower groove 401 of the lower fixed table 4, and control the drive motor 5 to start;

[0033] The output end of the driving motor 5 drives the ball screw 11 to rotate, and at the same time, due to the limiting effect of the limiting rod 13, the lifting nut 12 moves downward;

[0034] The lifting nut 12 squeezes the opening and closing link 14 through the pulling link 17, so that the opening and closing link 14 is closed in the vertical direction, and the opening and closing link 14 drives the limit slider 16 to slide in the limit groove 15, so that the upper fixed platform 6 moves vertically downward along the guide column 8 until it contacts and connects with the lower fixed platform 4;

[0035] The upper groove 601 is matched with the lower groove 401 to fix the cross-tube between the upper fixing platform 6 and the lower fixing platform 4 , and then the bending moment test of the cross-tube is performed through the test pressure gauge 7 .

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mechanical four-way bending moment test device, comprising a suspension (1) and a base (2), characterized in that: A load plate (3) is fixedly mounted on the lower end of the suspension (1); a lower fixed platform (4) for carrying a four-way workpiece is fixedly mounted on the base (2); a driving motor (5) is fixedly mounted on the load plate (3); and an upper fixed platform (6) corresponding to the lower fixed platform (4) and used for pressing the four-way workpiece is arranged on the load plate (3) through the driving motor (5); a test pressure gauge (7) for testing bending moment is fixedly mounted on the upper fixed platform (6).

2. The mechanical cross-bending moment testing device according to claim 1, characterized in that: The suspension frame (1), the load plate (3), the upper fixed platform (6), the lower fixed platform (4), and the base (2) are arranged in sequence from top to bottom, and the lower fixed platform (4) and the upper fixed platform (6) are respectively provided with a lower groove (401) and an upper groove (601) for fitting a four-way workpiece.

3. The mechanical cross-bending moment testing device according to claim 1, characterized in that: Four guide columns (8) are fixedly connected between the load-bearing plate (3) and the lower fixed platform (4), and a guide through hole (9) for slidingly sleeve-mounting the guide column (8) is provided in the upper fixed platform (6).

4. The mechanical cross-bending moment testing device according to claim 1, characterized in that: The lower end of the load plate (3) is integrally connected to a limit bracket (10), and a ball screw (11) fixedly connected to the output end of the drive motor (5) is rotatably installed between the load plate (3) and the limit bracket (10), a lifting nut (12) is matched with the ball screw (11), a pin shaft at the lower end of the load plate (3) is connected to an opening and closing connecting rod (14) movably pulled by the lifting nut (12), a limit slot (15) is provided in the upper fixed platform (6), and a limit slider (16) connected to the pin shaft of the opening and closing connecting rod (14) is slidably installed in the limit slot (15).

5. The mechanical cross-bending moment testing device according to claim 4, characterized in that: The lifting nut (12) is integrally connected with a limiting rod (13) which slides through the limiting bracket (10).

6. The mechanical cross-bending moment testing device according to claim 4, characterized in that: A traction rod (17) is pin-connected between the lifting nut (12) and the opening and closing connecting rod (14).

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