Impact resistance detection device and method for low-precipitation PC material

Abstract

The invention relates to the field of impact resistance detection of PC materials, in particular to an impact resistance detection device and method of a low-precipitation PC material.The impact resistance detection device comprises a rectangular box, an upper circular cavity and a lower circular cavity are symmetrically formed in the rectangular box and communicate with each other, and sliding grooves communicating with the upper circular cavity and the lower circular cavity are formed in the two sides of the rectangular box; one side of the rectangular box is further provided with a placing groove communicated with the lower circular cavity, the inner wall of the upper circular cavity is further provided with a heating plate, a sliding block is arranged in the sliding groove in a sliding mode, rotating shafts are rotationally arranged on the sliding block in a penetrating mode, a cylinder is arranged between the rotating shafts, and the inner diameter of the cylinder is provided with a mounting unit used for mounting a PC transverse plate and a PC arc plate; the inner wall of the cylinder is further provided with a testing unit used for carrying out impact resistance testing on the PC transverse plate and the PC arc plate, the PC transverse plate and the PC arc plate can be clamped through the installation unit, and therefore the impact resistance testing device can carry out impact resistance testing on the straight PC plate and the arc PC plate.

Description

Technical Field

[0001] The present invention relates to the field of impact resistance detection of PC materials, and in particular to an impact resistance detection device and a detection method for low-precipitation PC materials. Background Art

[0002] Low-precipitation PC material is a special polycarbonate material. Compared with ordinary PC material, it can maintain higher transparency and appearance quality under high temperature or long-term use, while maintaining excellent mechanical properties and flame retardant properties. After its research and development or production is completed, it is usually necessary to conduct physical impact testing on it to detect the hardness and toughness of its material. Existing impact testing devices and methods usually use an impact ball to impact the surface of the PC board, and detect the impact resistance of the PC board through observation or impact force detection. However, the impact ball usually impacts the PC board in a free fall manner, and the impact force of the impact ball cannot be accurately controlled. In some processes that require strong impact, it is usually necessary to increase the falling height of the impact ball or increase the mass of the impact ball, which makes the testing steps more cumbersome.

[0003] Moreover, existing testing devices can usually only perform impact force detection on a single area of ​​a PC board, and cannot simulate the stress scenario of the PC board when it is subjected to multiple impact forces. Similarly, a single-shaped impact ball cannot test the changes that occur to the PC board when facing impacts of other shapes. Therefore, the existing methods for impact testing PC boards are relatively simple.

[0004] In the prior art, for example, the patent with publication number CN117288605A provides a PC material impact resistance detection device and detection method, which uses a steel ball drop assembly and a steel ball clamping assembly to realize the impact test of the PC board by releasing the steel ball through the drop assembly, and after the small ball is released and hit, the steel ball clamping assembly captures and clamps the small ball to prevent the small ball from jumping. However, although this technology improves some of the original problems, there are still aspects that need to be further optimized to better meet the actual detection needs.

[0005] 1. The above-mentioned prior art can only perform impact test on PC board by steel ball. Although the steel ball after impact can be clamped by steel ball clamping assembly to perform single impact test on PC board, one side can only perform single impact test on PC board, and it is impossible to simulate the effect of multiple impacts on PC board. Therefore, the testing method is relatively single, and in the process of falling of steel ball, since the steel ball is not subject to falling limit, it is impossible to ensure that the steel ball accurately hits the predetermined position.

[0006] 2. The above-mentioned prior art makes the shaping mud block correspond to the back of the PC board. After the PC board is hit by the steel ball, the PC board falls and contacts the shaping mud block, causing the deformation position of the PC board to squeeze the surface of the shaping mud block, so as to observe the deformation effect of the PC board after the impact. However, during the falling process of the PC board, the falling force and the impact force received by the PC board when it contacts the shaping mud block offset each other, resulting in the PC board being unable to make direct hard contact with the steel ball. When the PC board is deformed and contacts the shaping mud block, the deformation position squeezes the shaping mud block, so that the outside of the shaping mud block shows the deformation state of the PC board after the impact. However, during the extrusion process, the PC board will still exert downward pressure on the shaping mud block, causing part of the deformation force to be offset. Therefore, the deformation protrusions revealed on the shaping mud block cannot accurately reflect the actual deformation state of the PC board after the impact, there is a certain error, and the applicability is not high.

[0007] Therefore, based on the above-stated viewpoints, there is still room for optimization in the existing technology for impact resistance testing of PC boards. Summary of the invention

[0008] In order to solve the above problems, the present invention provides an impact resistance detection device for low-precipitation PC materials, comprising a rectangular box, wherein an upper circular cavity and a lower circular cavity are symmetrically provided in the rectangular box, and the upper circular cavity and the lower circular cavity are interconnected, sliding grooves interconnected with the upper circular cavity and the lower circular cavity are provided on both sides of the rectangular box, and a placement groove interconnected with the lower circular cavity is also provided on one side of the rectangular box, a heating plate is also provided on the inner wall of the upper circular cavity, a sliding block is slidably provided in the sliding groove, a rotating shaft is rotatably penetrated on the sliding block, a cylinder is provided between the rotating shafts, an installation unit for installing a PC horizontal plate and a PC arc plate is provided on the inner wall of the cylinder, and a test unit for performing an impact resistance test on the PC horizontal plate and the PC arc plate is also provided on the inner wall of the cylinder.

[0009] The mounting unit comprises a plurality of mounting grooves symmetrically arranged on the inner diameter of the cylinder, and two corresponding mounting grooves on the left and right form a first group.

[0010] Preferably, a plurality of push spring rods distributed along the extension section of the installation groove are arranged on the upper and lower inner walls, and a clamping plate is commonly arranged at the telescopic ends of the push spring rods in the same row.

[0011] Preferably, the test unit includes a plurality of support plates arranged on the inner wall of the cylinder at equal intervals, the front and rear corresponding support plates form a group, limiting grooves are provided on the support plates, strip plates are slidably arranged in the front and rear corresponding limiting grooves, and an impact end for contacting the PC cross plate and the PC arc plate is provided on the lower side of the strip plate.

[0012] Preferably, a return tension spring is provided between the strip plate and the inner wall of the corresponding limiting groove.

[0013] Preferably, the impact end includes conical plates symmetrically arranged on both sides of the strip plates, an impact shaft is rotatably arranged between the conical plates, an impact cylinder is sleeved on the outside of the impact shaft, and a plurality of circular grooves equidistantly distributed along its axis and extension section are opened on the outside of the impact cylinder, and the circular grooves are threadedly connected with mounting bolts.

[0014] Preferably, a triangular impact plate is provided between the corresponding mounting bolts on one side, and a conical impact block or an impact ball is provided at one end of the corresponding mounting bolt on the other side located outside the circular groove.

[0015] Preferably, a rectangular frame plate is arranged between the support plates, and a driving unit for driving the strip plate to move is arranged inside the rectangular frame plate. The driving unit includes several driving shafts that are arranged on the inner walls of both sides of the rectangular frame plate and correspond to the support plates one by one through the rotation of the spiral spring.

[0016] A winding wheel is sleeved on the outside of the driving shaft, and a traction rope is wound on the outside of the winding wheel. The inner bottom wall of the rectangular frame plate is provided with several through grooves corresponding to the driving shaft, and one side of the traction rope passes through the corresponding through groove and is connected to the strip plate.

[0017] Preferably, a main shaft is arranged between the support plates on one side for common rotation, a transmission belt is arranged between the main shaft and the corresponding driving shaft, and the transmission belt passes through the outer wall of the rectangular frame plate, a ratchet tooth is arranged on the outer side of the main shaft, a semi-annular groove is arranged on the inner wall of the upper circular cavity, a plurality of driving teeth distributed along its axis are arranged on the inner wall of the semi-annular groove, an outer side of the ratchet tooth is arranged with an outer gear ring corresponding to the driving teeth, and a structural groove is arranged on the outer side of the cylinder for the ratchet tooth and the outer gear ring to pass through.

[0018] In addition, the present invention also provides a method for detecting the impact resistance of a low-precipitation PC material, comprising the following steps: S1, PC board installation: The sliding block indirectly drives the cylinder to move into the lower circular cavity, and the PC horizontal plate or PC arc plate is installed on the installation unit.

[0019] S2, PC horizontal board test: The PC horizontal board is driven into the upper circular cavity by the installation unit, and the test unit performs an impact test on the PC horizontal board. The test effect of the PC horizontal board at different temperatures is tested by the heating plate.

[0020] S3, PC arc board test: The end face of the PC arc board is arc-shaped. The purpose is to test the impact resistance of the PC board in different shapes. The PC arc board is tested by the test unit and the heating plate.

[0021] S4, test completed: After the test is completed, the sliding block indirectly drives the cylinder to move into the lower circular cavity, and the PC horizontal plate or PC arc plate is removed from the installation unit.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present invention can clamp the PC horizontal plate and the PC arc plate through the installation unit, so that the present invention can perform impact resistance testing on both straight and arc-shaped PC plates, and after the PC horizontal plate and the PC arc plate are installed on the installation unit, the ends of the PC horizontal plate and the PC arc plate can be limited again through the blocking component to prevent them from shifting during the test and causing inaccurate test data.

[0023] 2. The present invention can simulate the fracture behavior under different stress concentration conditions by pre-opening fracture grooves on the end faces of the PC cross plate and the PC arc plate; by changing the geometric parameters of the fracture grooves, the fracture toughness of the PC cross plate and the PC arc plate under different stress states can be more comprehensively evaluated; and with the cooperation of the test unit and the impact end, the PC cross plate and the PC arc plate can be tested with a variety of impact objects through triangular impact plates, conical impact blocks and impact balls, simulating the impact scenarios that the PC cross plate and the PC arc plate are subjected to during daily use, thereby further improving the applicability of the present invention.

[0024] 3. The present invention can more conveniently adjust the impact force of the impact end on the PC horizontal plate and the PC arc plate through the driving unit, so that the impact end can simulate different impact forces to perform impact resistance detection on the PC horizontal plate and the PC arc plate, and during the detection process, the PC horizontal plate and the PC arc plate are heated by the heating plate to simulate the impact resistance effect of the PC horizontal plate and the PC arc plate at different temperatures, which is in line with actual usage conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0027] Figure 2 It is a schematic cross-sectional view of the main body of the present invention.

[0028] Figure 3 It is a schematic structural diagram of the upper circular cavity and the lower circular cavity of the present invention.

[0029] Figure 4 It is a structural schematic diagram of the installation unit of the present invention.

[0030] Figure 5 It is a plan cross-sectional view of the installation unit of the present invention.

[0031] Figure 6 It is a schematic diagram of the installation of the test unit and the cylinder of the present invention.

[0032] Figure 7 It is a structural schematic diagram of the test unit of the present invention.

[0033] Figure 8It is a structural schematic diagram of the impact end of the present invention.

[0034] Fig. 9 It is a schematic structural diagram of the drive unit of the present invention.

[0035] Fig.10 It is a structural schematic diagram of the driving unit of the present invention from another perspective.

[0036] Fig.11 The present invention Fig.10 A partial enlarged view of the structure at point A.

[0037] Fig.12 It is a structural schematic diagram of the PC horizontal board of the present invention.

[0038] Fig.13 It is a structural schematic diagram of the PC arc plate of the present invention.

[0039] Fig.14 It is a schematic structural diagram of the plugging assembly of the present invention.

[0040] In the figure, 1, rectangular box; 10, upper circular cavity; 11, lower circular cavity; 12, sliding groove; 13, placement groove; 14, sliding block; 15, rotating shaft; 16, cylinder; 17, PC horizontal plate; 18, PC arc plate; 19, blocking cloth; 2, mounting unit; 20, mounting groove; 21, push spring rod; 22, clamping plate; 3, test unit; 30, support plate; 31, limit groove; 32, strip plate; 33, reset tension spring; 4, impact end; 40, cone plate; 4 1. Impact shaft; 42. Impact cylinder; 43. Circular groove; 44. Mounting bolt; 45. Triangular impact plate; 46. Conical impact block; 47. Impact ball; 5. Drive unit; 50. Rectangular frame plate; 51. Drive shaft; 52. Winding wheel; 53. Traction rope; 54. Through groove; 55. Main shaft; 56. Ratchet teeth; 57. Drive teeth; 58. Outer gear ring; 6. Fracture groove; 7. Sealing assembly; 70. Annular groove; 71. Arc sealing plate; 72. Shifting block. DETAILED DESCRIPTION

[0041] The following combination Figures 1 to 14 Embodiments of the present invention are described in detail.

[0042] The embodiments of the present application disclose an impact resistance detection device and detection method for low-precipitation PC materials, which illustrate that the present application is mainly suitable for impact resistance testing of low-precipitation PC materials, and can install and limit PC cross plates and PC arc plates, and simultaneously perform impact resistance testing on them. More importantly, the impact part in the present application can perform multiple impacts on the PC cross plates and PC arc plates in a single test, and according to the test standards, the tester can install different types of impact devices on the impact part to perform impact tests on the PC cross plates and PC arc plates, and during the testing of the PC cross plates and PC arc plates, the present application can also detect the impact resistance of the PC cross plates and PC arc plates at different temperatures by heating the PC cross plates and PC arc plates, thereby further improving the applicability of the present application.

[0043] Example 1: Reference Figure 1 , Figure 2 , Figure 3 , Fig.12 and Fig.13 As shown, it includes a rectangular box 1, an upper circular cavity 10, a lower circular cavity 11, a sliding groove 12, a placement groove 13, a sliding block 14, a rotating shaft 15, a cylinder 16, a PC cross plate 17, a PC arc plate 18, an installation unit 2, a test unit 3 and a sealing cloth 19. The upper circular cavity 10 and the lower circular cavity 11 are symmetrically opened in the rectangular box 1, and the upper circular cavity 10 and the lower circular cavity 11 are interconnected. Sliding grooves 12 interconnected with the upper circular cavity 10 and the lower circular cavity 11 are opened on both sides of the rectangular box 1. A placement groove 13 interconnected with the lower circular cavity 11 is also opened on one side of the rectangular box 1. A heating plate (not shown in the figure) is also arranged on the inner wall of the upper circular cavity 10. A sliding block 14 is slidably arranged in the sliding groove 12. A rotating shaft 15 is rotatably penetrated through the sliding block 14, and a cylinder 16 is arranged between the rotating shafts 15.

[0044] That is, by connecting the sliding block 14 with the external cylinder, the sliding block 14 can be pushed to move in the corresponding sliding groove 12 in the up and down directions, so that the sliding block 14 can drive the cylinder 16 to move from the upper circular cavity 10 to the lower circular cavity 11 through the rotating shaft 15, or from the lower circular cavity 11 to the upper circular cavity 10. The external motor can be connected to the end of the rotating shaft 15, and the cylinder 16 can be driven to rotate in the upper circular cavity 10 or the lower circular cavity 11 through the rotating shaft 15.

[0045] The inner wall of the cylinder 16 is provided with a mounting unit 2 for mounting the PC horizontal plate 17 and the PC arc plate 18. The inner wall of the cylinder 16 is also provided with a test unit 3 for performing an impact test on the PC horizontal plate 17 and the PC arc plate 18. During installation, the cylinder 16 is indirectly driven by the sliding block 14 to move into the lower circular cavity 11, so that the mounting unit 2 can correspond to the placement groove 13, and then the PC horizontal plate 17 or the PC arc plate 18 is installed on the mounting unit 2 through the placement groove 13, and then the cylinder 16 is indirectly driven by the sliding block 14 to move to the upper circular cavity 11 again. In the cavity 10, the PC horizontal plate 17 or the PC arc plate 18 is subjected to an impact resistance test by the test unit 3, and the interior of the upper circular cavity 10 is heated by the heating plate during the test to test the impact resistance of the PC horizontal plate 17 or the PC arc plate 18 under different temperatures, and a sealing cloth 19 is provided on the inner wall of the sliding groove 12 and the outer side of the sliding block 14. The sealing cloth 19 is made of a flexible material and expands and contracts synchronously with the sliding block 14 to seal the sliding groove 12 to prevent the hot air in the upper circular cavity 10 from leaking through the sliding groove 12.

[0046] Reference Figure 4 and Figure 5 As shown, the installation unit 2 is used to install the PC cross plate 17 and the PC arc plate 18; specifically, the installation unit 2 includes a mounting groove 20, a push spring rod 21 and a clamping plate 22. Several symmetrically distributed mounting grooves 20 are opened on the inner diameter of the cylinder 16. Two left and right corresponding mounting grooves 20 are the first group, and the spacing between the left and right of each group of mounting grooves 20 gradually decreases from top to bottom. When installing the PC cross plate 17 or the PC arc plate 18, the PC cross plate 17 or the PC arc plate 18 is inserted into the corresponding two mounting grooves 20 through the placement groove 13, that is, the spacing between the two mounting grooves 20 in each group is different, so it can be inserted into the corresponding two mounting grooves 20 according to the different widths of the PC cross plate 17 or the PC arc plate 18.

[0047] The upper and lower inner walls of the mounting groove 20 are provided with a plurality of push spring rods 21 distributed along the extension section thereof, and the telescopic ends of the push spring rods 21 in the same row are commonly provided with clamping plates 22, and the upper and lower corresponding clamping plates 22 clamp the PC transverse plate 17 and the PC arc plate 18. When the PC transverse plate 17 or the PC arc plate 18 is inserted into the mounting groove 20, the PC transverse plate 17 or the PC arc plate 18 will drive the two corresponding clamping plates 22 to separate, and then after the PC transverse plate 17 or the PC arc plate 18 is inserted, the push spring rods 21 will drive the corresponding clamping plates 22 to clamp the end faces of the PC transverse plate 17 or the PC arc plate 18 tightly to prevent the PC transverse plate 17 or the PC arc plate 18 from deflecting during the impact process.

[0048] Reference Figure 6 and Figure 7As shown, the test unit 3 is used to perform impact resistance test on the PC cross plate 17 and the PC arc plate 18; specifically, the test unit 3 includes a support plate 30, a limit groove 31, a strip plate 32, an impact end 4 and a reset spring 33, and several support plates 30 distributed at equal intervals are arranged on the inner wall of the cylinder 16, and the front and rear corresponding support plates 30 are a group, that is, the cylinder 16 can drive the support plates 30 to rotate synchronously with it; a limit groove 31 is provided on the support plate 30, and a strip plate 32 is slidably arranged in the front and rear corresponding limit grooves 31, and the impact end 4 for contacting the PC cross plate 17 and the PC arc plate 18 is arranged on the lower side of the strip plate 32, and the strip plate 32 can drive the impact end 4 to move up and down under the limit guide of the limit groove 31.

[0049] A reset spring 33 is provided between the strip plate 32 and the inner wall of the corresponding limiting groove 31. In the initial state, the reset spring 33 pulls the corresponding strip plate 32 to always be close to the inner bottom wall of the limiting groove 31. When the strip plate 32 is driven to move upward by an external force, the reset spring 33 will stretch and accumulate force. After that, the strip plate 32 is no longer subjected to force, and the reset spring 33 will pull the strip plate 32 to move quickly toward the inner bottom wall of the limiting groove 31, and during the movement process, the impact end 4 is driven to move toward the PC cross plate 17 or the PC arc plate 18, and contacts the surface of the PC cross plate 17 or the PC arc plate 18 to complete the impact. The stretching length of the reset spring 33 pulled by the strip plate 32 can adjust the impact force of the impact end 4 on the PC cross plate 17 or the PC arc plate 18.

[0050] Reference Figure 8 As shown, the impact end 4 is used to contact the PC cross plate 17 and the PC arc plate 18; specifically, the impact end 4 includes a conical plate 40, an impact shaft 41, an impact cylinder 42, a circular groove 43, a mounting bolt 44, a triangular impact plate 45, a conical impact block 46 and an impact ball 47. Two symmetrically distributed conical plates 40 are arranged on both sides of the strip plate 32, and an impact shaft 41 is rotatably arranged between the conical plates 40. The impact cylinder 42 is sleeved on the outer side of the impact shaft 41. The outer side of the impact cylinder 42 is provided with a number of circular grooves 43 distributed at equal intervals along its axis and extension section. The inner thread of the circular groove 43 is connected with a mounting bolt 44. The strip plate 32 can drive the conical plate 40 to move synchronously. The impact cylinder 42 is limited by the impact shaft 41, and can drive the impact shaft 41 to rotate under the limitation of the corresponding two conical plates 40. The mounting bolt 44 can be inserted into or removed from the corresponding circular groove 43 by rotation.

[0051] A triangular impact plate 45 is commonly provided between the corresponding mounting bolts 44 on one side. The triangular impact plate 45 is used to perform an impact test on the length end surface of the PC cross plate 17 or the PC arc plate 18 to test the overall stability of the PC cross plate 17 or the PC arc plate 18.

[0052] The triangular impact plate 45 is rotatably connected to the mounting bolt 44, and a conical impact block 46 is provided at one end of the mounting bolt 44 corresponding to the other side, which is located outside the circular groove 43. The end of the conical impact block 46 is conical and pointed, so as to test the overall protective performance of the PC horizontal plate 17 or the PC arc plate 18 after colliding with a pointed cone object.

[0053] The mounting bolt 44 can be replaced with an impact ball 47 , which simulates the impact effect of an ordinary steel ball on the PC horizontal plate 17 or the PC arc plate 18 .

[0054] That is, according to different testing methods, the tester can install the triangular impact plate 45, the conical impact block 46 and the impact ball 47 on the side of the impact tube 42, and change different impact objects by rotating the impact tube 42 to perform impact resistance test on the PC cross plate 17 or the PC arc plate 18. Since the corresponding mounting bolts 44 are rotatably connected to the triangular impact plate 45, multiple mounting bolts 44 can be rotated to enter the circular groove 43 to limit the triangular impact plate 45.

[0055] A high-speed camera (not shown in the figure) is also provided on the inner wall of the cylinder 16, which is a prior art. Its purpose is to quickly capture the deformation process of the PC horizontal plate 17 or the PC arc plate 18 through the high-speed camera at the moment of collision when the triangular impact plate 45, the conical impact block 46 and the impact ball 47 collide with the PC horizontal plate 17 or the PC arc plate 18, so that the inspection personnel can judge the impact resistance of the PC horizontal plate 17 or the PC arc plate 18 after the inspection is completed.

[0056] A clamping assembly is installed between the outer side of the impact shaft 41 and the conical plate 40 (which is the prior art and limits the impact shaft 41 in sections), so that the impact shaft 41 can rotate when driven by an external force, but will not rotate during an impact test. Therefore, when changing the collision object, the tester needs to drive the impact tube 42 and the impact shaft 41 to rotate manually or with the help of an external driving device.

[0057] Reference Fig. 9 , Fig.10 and Fig.11 As shown, a rectangular frame plate 50 is commonly arranged between the support plates 30, and a driving unit 5 for driving the strip plate 32 to move is arranged inside the rectangular frame plate 50; specifically, the driving unit 5 includes a rectangular frame plate 50, a driving shaft 51, a winding wheel 52, a traction rope 53, a through groove 54, a main shaft 55, a ratchet wheel ratchet 56, a driving tooth 57 and an outer gear ring 58, and several driving shafts 51 corresponding to the support plates 30 are rotatably arranged on the inner walls on both sides of the rectangular frame plate 50 through a volute spring, and the driving shafts 51 are connected by a belt drive, that is, multiple driving shafts 51 can be rotated synchronously by a belt drive, and when the driving shaft 51 rotates, it can drive the volute spring to store force.

[0058] A winding wheel 52 is sleeved on the outside of the driving shaft 51, and a traction rope 53 is wound on the outside of the winding wheel 52. The inner bottom wall of the rectangular frame plate 50 is provided with several through grooves 54 corresponding to the driving shaft 51. One side of the traction rope 53 passes through the corresponding through groove 54 and is connected to the strip plate 32. The driving shaft 51 can drive the corresponding winding wheel 52 to rotate, and the winding wheel 52 can drive the traction rope 53 to be wound on its side. Through the change of the winding of the traction rope 53, the traction rope 53 can pull the corresponding strip plate 32 to move upward and drive the corresponding reset spring 33 to accumulate force. When the driving shaft 51 is no longer driven by external force, the strip plate 32 will drive the corresponding impact end 4 to descend and impact the PC cross plate 17 or the PC arc plate 18 under the pull of the reset spring 33. At the same time, the winding wheel 52 will reversely drive the driving shaft 51 to release the traction rope 53.

[0059] A main shaft 55 is arranged between the support plates 30 on one side for common rotation, a transmission belt is arranged between the main shaft 55 and the corresponding driving shaft 51, and the transmission belt passes through the outer wall of the rectangular frame plate 50, a ratchet tooth 56 is arranged on the outer side of the main shaft 55, a semi-annular groove is arranged on the inner wall of the upper circular cavity 10, and a plurality of driving teeth 57 distributed along its axis are arranged on the inner wall of the semi-annular groove, and an outer gear ring 58 corresponding to the driving teeth 57 is arranged on the outer side of the ratchet tooth 56, and a structural groove is arranged on the outer side of the cylinder 16 for the ratchet tooth 56 and the outer gear ring 58 to pass through, that is, the outer gear ring 58 can drive the main shaft 55 to rotate between the support plates 30 through the ratchet tooth 56, and during the rotation of the main shaft 55, it can drive the driving shaft 51 to rotate through the transmission belt.

[0060] Therefore, in actual use, after the cylinder 16 moves into the upper circular cavity 10, the rotating shaft 15 drives the cylinder 16 to rotate counterclockwise, so that the outer gear ring 58 meshes with the driving teeth 57 and drives the ratchet teeth 56 to rotate, and the ratchet teeth 56 can drive the main shaft 55 to rotate, so that the main shaft 55 can indirectly drive the driving shaft 51 to rotate, so that the reset tension spring 33 accumulates force. When the reset tension spring 33 completes the accumulation of force, the rotating shaft 15 drives the cylinder 16 clockwise. The outer gear ring 58 can still rotate on the outside of the ratchet teeth 56 driven by the driving teeth 57, but it can only drive the ring outside the ratchet teeth 56 to rotate, and the ratchet will not be driven to rotate and will not be subjected to force. At this time, the reset spring 33 can pull the strip plate 32 down, and the descent of the strip plate 32 will indirectly drive the main shaft 55 to rotate in the opposite direction through the traction rope 53, that is, the main shaft 55 drives the ratchet to rotate, and the rotation direction is opposite to that of the ring.

[0061] It should be noted that in the initial state, the force of the volute spring is greater than the tension of the reset push spring. However, after the reset tension spring 33 is stretched to a certain length, even if the volute spring has been driven by the drive shaft 51 to store force, its winding force is not as large as the tension of the reset tension spring 33. Therefore, after the reset tension spring 33 pulls the strip plate 32 down to the bottom, the reset tension spring 33 has contracted to the initial state, and the volute spring is in a force storage state. When the falling force of the strip plate 32 is less, the volute spring will drive the drive shaft 51 to rotate in the opposite direction, and indirectly pull the strip plate 32 upward for a certain distance through the traction rope 53, so that the impact end 4 will not always be in contact with the outer side of the PC cross plate 17 or the PC arc plate 18, which is convenient for personnel to disassemble and assemble later.

[0062] Reference Fig.12 and Fig.13 As shown, a PC horizontal plate 17 or a PC arc plate 18 is installed in the corresponding installation grooves 20 on the left and right, and the PC horizontal plate 17 or the PC arc plate 18 is clamped by the corresponding clamping plate 22, and the PC horizontal plate 17 and the PC arc plate 18 are provided with a plurality of fracture grooves 6 distributed along their extension sections and inner diameters, and the outer diameter of the PC arc plate 18 corresponds to the inner diameter of the cylinder 16.

[0063] That is, the triangular impact plate 45, the conical impact block 46 and the impact ball 47 can impact the fracture groove 6 to test whether the weak position of the fracture groove 6 on the PC cross plate 17 or the PC arc plate 18 is broken after the impact. Before the test, the position of the fracture groove 6 can also be changed so that the triangular impact plate 45, the conical impact block 46 and the impact ball 47 directly impact the end face of the PC cross plate 17 or the PC arc plate 18 to test whether the PC cross plate 17 or the PC arc plate 18 will break from the fracture after the impact. During the test, the depth, width and shape of the fracture groove 6 can be precisely adjusted according to different test requirements to simulate the fracture behavior under different stress concentration conditions; by changing the geometric parameters of the fracture groove 6, the fracture toughness of the PC cross plate 17 and the PC arc plate 18 under different stress states can be more comprehensively evaluated. Of course, the PC cross plate 17 and the PC arc plate 18 can also be tested directly without opening the fracture groove 6.

[0064] Example 2: Reference Fig.14As shown, on the basis of the first embodiment, during the rotation of the cylinder 16, the PC horizontal plate 17 or the PC arc plate 18 may move out of the mounting groove 20 during the following rotation, so a blocking component 7 is provided on one side of the cylinder 16 to block the mounting groove 20; specifically, the blocking component 7 includes an annular groove 70, an arc-shaped sealing plate 71 and a shifting block 72, the annular groove 70 is provided on one side of the cylinder 16 and is connected with the mounting groove 20, and an arc-shaped sealing plate 71 is slidably provided in the annular groove 70, and the arc-shaped sealing plate 71 is slidably provided in the annular groove 70. A rubber sticker is adhered to one side close to the inner wall of the annular groove 70, and a shift block 72 is provided on one side of the arc sealing plate 71. That is, after the PC cross plate 17 or the PC arc plate 18 is installed, the staff shifts the shift block 72 to drive the arc sealing plate 71 to correspond to one side of the installation groove 20, and seals it to prevent the PC cross plate 17 or the PC arc plate 18 from moving out of the installation groove 20. The rubber sticker is used to increase the friction between the arc sealing plate 71 and the inner wall of the annular groove 70 to prevent the arc sealing plate 71 from accidentally sliding in the annular groove 70.

[0065] After the PC horizontal plate 17 or the PC arc plate 18 has completed the inspection, the cylinder 16 moves into the lower circular cavity 11, and the staff opens the arc-shaped sealing plate 71 through the placement groove 13, and no longer blocks the installation groove 20, and the PC horizontal plate 17 or the PC arc plate 18 can be taken out from the corresponding installation groove 20.

[0066] Embodiment 3: On the basis of Embodiment 1 and Embodiment 2, when the PC arc plate 18 is installed, its arc surface can not only correspond to the inner wall of the cylinder 16, and its inner diameter can be impacted by the impact end 4, but the PC arc plate 18 can also be turned over and installed on the mounting unit 2, so that the outer diameter of the PC arc plate 18 corresponds to the impact end 4, and then the outer diameter of the PC arc plate 18 is impacted by the impact end 4, so as to realize the detection of the impact resistance of the inner diameter and outer diameter of the PC arc plate 18, thereby further improving the applicability of the present invention.

[0067] In addition, the present invention also provides a method for detecting the impact resistance of a low-precipitation PC material, comprising the following steps: S1, PC board installation: drive the sliding block 14 through external force to indirectly drive the cylinder 16 to move into the lower circular cavity 11, so that the installation unit 2 corresponds to the placement groove 13, and then install the PC cross plate 17 or PC arc plate 18 on the installation unit 2 through the placement groove 13, and limit it through the installation unit 2.

[0068] S2, PC horizontal board test: the circular cavity drives the PC horizontal board 17 into the upper circular cavity 10 through the installation unit 2, and then the test unit 3 performs an impact test on the PC horizontal board 17. During the impact test, the temperature in the upper circular cavity 10 is increased through the heating plate to test the impact resistance of the PC horizontal board 17 at different temperatures.

[0069] S3, PC arc plate test: The end face of the PC arc plate 18 is arc-shaped, and the purpose is to test the impact resistance of the PC plate in different shapes. Similarly, the PC arc plate 18 is tested by the test unit 3, and during the test, the temperature in the upper circular cavity 10 is heated by the heating plate to detect the impact resistance of the PC arc plate 18 at different temperatures.

[0070] S4, test completed: After the PC horizontal plate 17 and the PC arc plate 18 complete the test, the sliding block 14 is driven by external force to indirectly drive the cylinder 16 to move into the lower circular cavity 11, and then the PC horizontal plate 17 or the PC arc plate 18 is removed from the mounting unit 2.

[0071] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0072] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An impact resistance testing device for low precipitation PC material, comprising a rectangular box (1), characterized in that: The rectangular box (1) is symmetrically provided with an upper circular cavity (10) and a lower circular cavity (11), and the upper circular cavity (10) and the lower circular cavity (11) are interconnected. Sliding grooves (12) interpenetrating with the upper circular cavity (10) and the lower circular cavity (11) are provided on both sides of the rectangular box (1). A placement groove (13) interpenetrating with the lower circular cavity (11) is also provided on one side of the rectangular box (1). A heating plate is also provided on the inner wall of the upper circular cavity (10). A sliding block (14) is slidably provided in the sliding groove (12). A rotating shaft (15) is rotatably provided on the sliding block (14). A cylinder (16) is provided between the rotating shafts (15). An installation unit (2) for installing a PC horizontal plate (17) and a PC arc plate (18) is provided on the inner wall of the cylinder (16). A test unit (3) for performing an impact resistance test on the PC horizontal plate (17) and the PC arc plate (18) is also provided on the inner wall of the cylinder (16). The mounting unit (2) comprises a plurality of mounting grooves (20) symmetrically arranged on the inner diameter of the cylinder (16), wherein two corresponding mounting grooves (20) on the left and right form a first group.

2. The impact resistance detection device for low precipitation PC material according to claim 1, characterized in that: The upper and lower inner walls of the installation groove (20) are provided with a plurality of push spring rods (21) distributed along the extension section thereof, and the telescopic ends of the push spring rods (21) in the same row are provided with a clamping plate (22) in common.

3. The impact resistance detection device for low precipitation PC material according to claim 1, characterized in that: The test unit (3) comprises a plurality of support plates (30) arranged on the inner wall of the cylinder (16) and distributed at equal intervals, wherein the front and rear corresponding support plates (30) form a group, and the support plates (30) are provided with limit grooves (31), and strip plates (32) are slidably arranged in the front and rear corresponding limit grooves (31), and the lower side of the strip plates (32) is provided with an impact end (4) for contacting the PC horizontal plate (17) and the PC arc plate (18).

4. The impact resistance detection device for low precipitation PC material according to claim 3 is characterized in that: A return tension spring (33) is provided between the strip plate (32) and the inner wall of the corresponding limiting groove (31).

5. The impact resistance detection device for low precipitation PC material according to claim 3 is characterized in that: The impact end (4) comprises conical plates (40) symmetrically arranged on both sides of the strip plate (32), an impact shaft (41) is rotatably arranged between the conical plates (40), an impact tube (42) is sleeved on the outer side of the impact shaft (41), and a plurality of circular grooves (43) are formed on the outer side of the impact tube (42) at equal intervals along its axis and extension section, and mounting bolts (44) are threadedly connected to the circular grooves (43).

6. The impact resistance detection device for low precipitation PC material according to claim 5, characterized in that: A triangular impact plate (45) is provided between the mounting bolts (44) corresponding to one side, and a conical impact block (46) or an impact ball (47) is provided at one end of the mounting bolt (44) corresponding to the other side, which is located outside the circular groove (43).

7. The impact resistance detection device for low precipitation PC material according to claim 3, characterized in that: A rectangular frame plate (50) is disposed between the support plates (30), and a driving unit (5) for driving the strip plate (32) to move is disposed inside the rectangular frame plate (50), the driving unit (5) comprising a plurality of driving shafts (51) which are arranged on the inner walls of both sides of the rectangular frame plate (50) and correspond one to one with the support plates (30) through the rotation of a spiral spring; A winding wheel (52) is sleeved on the outside of the driving shaft (51), and a traction rope (53) is wound on the outside of the winding wheel (52). The inner bottom wall of the rectangular frame plate (50) is provided with a plurality of through slots (54) corresponding to the driving shaft (51), and one side of the traction rope (53) passes through the corresponding through slot (54) and is connected to the strip plate (32).

8. The impact resistance detection device for low precipitation PC material according to claim 3, characterized in that: A main shaft (55) is provided between the support plates (30) on one side for co-rotation, a transmission belt is provided between the main shaft (55) and the corresponding driving shaft (51), and the transmission belt passes through the outer wall of the rectangular frame plate (50), a ratchet wheel (56) is provided on the outer side of the main shaft (55), a semi-annular groove is provided on the inner wall of the upper circular cavity (10), a plurality of driving teeth (57) distributed along the axis thereof are provided on the inner wall of the semi-annular groove, and an outer tooth ring (58) corresponding to the driving teeth (57) is provided on the outer side of the ratchet wheel (56), and a structural groove for the ratchet wheel (56) and the outer tooth ring (58) to pass through is provided on the outer side of the cylinder (16).

9. A method for detecting the impact resistance of a low precipitation PC material, using a device for detecting the impact resistance of a low precipitation PC material as claimed in any one of claims 1 to 8, characterized in that: Detection Methods The following steps are involved: S1, PC board installation: the sliding block (14) indirectly drives the cylinder (16) to move into the lower circular cavity (11), and the PC horizontal plate (17) or the PC arc plate (18) is installed on the installation unit (2); S2, PC horizontal board test: the PC horizontal board (17) is driven into the upper circular cavity (10) by the installation unit (2), the test unit (3) performs an impact test on the PC horizontal board (17), and the test effect of the PC horizontal board (17) at different temperatures is tested by the heating plate; S3, PC arc plate test: the end surface of the PC arc plate (18) is arc-shaped, and the purpose is to test the impact resistance of the PC plate in different shapes. The PC arc plate (18) is tested by the test unit (3) and the heating plate; S4, test completed: After the test is completed, the sliding block (14) indirectly drives the cylinder (16) to move into the lower circular cavity (11), and removes the PC horizontal plate (17) or the PC arc plate (18) from the mounting unit (2).

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