Strength detection device for large-span prestressed concrete beam

Abstract

The invention belongs to the technical field of strength detection, and particularly relates to a strength detection device for a large-span prestressed concrete beam. Comprising a guide rail assembly, a sliding brake steering mechanism, a striking test device and a lifting control assembly, the lifting control assembly is arranged on the lifting control assembly, the sliding brake steering mechanism is arranged on the guide rail assembly in a sliding mode, and the striking test device is arranged on the sliding brake steering mechanism. According to the invention, the sliding brake steering mechanism slides along the right-angle guide rail, so that the motion trail of the strike testing device can pass through each small grid of the grid to-be-tested area, and the technical purpose of sequential testing is achieved under the condition that manual participation is not needed midway.

Description

Technical Field

[0001] The invention belongs to the technical field of strength detection, and specifically refers to a strength detection device for a large-span prestressed concrete beam. Background Art

[0002] The rebound method is a commonly used non-destructive testing method for testing concrete strength. It mainly uses a spring-driven hammer to hit the concrete surface through a striking rod (also called an impact rod), and measures the distance that the striking rod is bounced back. The rebound value (the ratio of the rebound distance to the initial length of the spring) is used as an indicator related to strength to infer the concrete strength.

[0003] When the impact rod hits the concrete surface, the concrete surface undergoes plastic deformation, consuming part of the work (the higher the concrete strength, the greater the surface hardness, and the smaller the plastic deformation), and the other part of the work is transmitted back to the impact rod through the elastic deformation of the concrete, converting kinetic energy into elastic potential energy; therefore, the higher the concrete strength and surface hardness, the farther the distance the heavy hammer will rebound.

[0004] At present, the operating method of the rebound tester is to manually squeeze the impact rod of the rebound tester toward the object to be tested in a direction perpendicular to the object to be tested. After being squeezed to a certain extent, the internal impact hammer will transmit the impact force to the surface of the object through the rebound rod. For general concrete strength measurement, a four-by-four grid is drawn at the position to be tested, and then the rebound test is carried out in sixteen small grids in turn. However, this manual operation method is not only cumbersome and labor-intensive, but also has too many accidental variables during human operation, making it difficult to consistently measure and feedback each measurement position. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a strength detection device for large-span prestressed concrete beams that does not require manual operation and has good consistency; through the sliding of the sliding brake steering mechanism along the right-angle guide rail, the movement trajectory of the impact test device can pass through each small grid of the grid test area, thereby achieving the technical purpose of sequential testing without the need for human intervention in the middle; through the locking and unlocking of the impact test device, the position of the square cavity can be automatically locked and fixed when the rebound tester is pressed, and the swinging tooth plate can be unfolded; when resetting, the movement restriction of the square cavity can be automatically released, and the device can be driven to travel a unit distance through the swinging tooth plate.

[0006] The technical solution adopted by the present invention is as follows: The present invention proposes a strength detection device for large-span prestressed concrete beams, including a guide rail assembly, a sliding brake steering mechanism, a bullet impact test device and a lifting control assembly, wherein the guide rail assembly is arranged on the lifting control assembly, the sliding brake steering mechanism is slidably arranged on the guide rail assembly, and the bullet impact test device is arranged on the sliding brake steering mechanism.

[0007] Furthermore, the guide rail assembly includes a right-angle guide rail and a guide rail connecting frame, the right-angle guide rail is composed of two separate rails, and the two parts of the right-angle guide rail are connected by the guide rail connecting frame.

[0008] By sliding the sliding brake steering mechanism along the right-angle guide rail, the movement trajectory of the impact test device can pass through each small grid of the grid test area, thereby achieving the technical purpose of sequential testing without the need for human intervention in the middle.

[0009] Furthermore, the sliding brake steering mechanism includes a sliding brake component, a pressure sensing component and a displacement component, the sliding brake component is slidably mounted on the guide rail component, the pressure sensing component is arranged in the sliding brake component, and the displacement component is arranged on the sliding brake component.

[0010] By locking and unlocking the impact test device, the position of the square cavity can be automatically locked and fixed when the rebound tester is pressed, and the swinging tooth plate can be unfolded. When resetting, the movement restriction of the square cavity can be automatically released, and the device can be driven to travel a unit distance through the swinging tooth plate.

[0011] Through the structural design of the sliding brake steering mechanism and the shape design of the right-angle guide rail, the sliding brake steering mechanism can automatically move in another direction perpendicular to it after sliding to the extreme position, thereby realizing automatic steering of the sliding brake steering mechanism.

[0012] Preferably, the sliding brake assembly includes a square cavity, a cross cavity, a brake sleeve, a brake grinding pad and a brake reset spring, the square cavity is snap-fitted and slidably arranged in the right-angle guide rail, the cross cavity is fixedly connected to the interior of the square cavity, the brake sleeve is fixedly connected to the interiors of the square cavity and the cross cavity, the brake grinding pad is snap-fitted and slidably arranged in the brake sleeve, and the brake reset spring is arranged between the top of the brake sleeve and the brake grinding pad.

[0013] Through the connection between the cross cavity and the brake sleeve, when the rebound tester is pressed, the brake pad can be extended outward due to the increase in internal pressure of the cross cavity and the brake sleeve, thereby realizing the position locking of the sliding brake steering mechanism and the impact test device, making the position of the rebound tester more fixed during the pressure application process; and when the right-angle guide rail is lifted and reset, the position lock of the square cavity can be released by the retraction of the brake pad.

[0014] As a further preferred embodiment of the present invention, the pressure sensing component includes a pressure relief knob, a fixed column, a piston plate and a pressure pipe, the pressure relief knob is detachably arranged on the top of the square cavity and the cross cavity, the fixed column is fixedly connected to the bottom wall of the cross cavity, the fixed column is evenly distributed with a first elastic rope in a ring shape, the piston plate is slidably arranged on the cross cavity, the end of the first elastic rope is fixedly connected to the piston plate, and the pressure pipe is arranged between the brake sleeve and the cross cavity. Furthermore, the displacement component includes a ratchet row, a swinging tooth plate and a second elastic rope, the ratchet row is fixedly connected to the right-angle guide rail, the swinging tooth plate is rotatably arranged on the piston plate, the end of the swinging tooth plate is provided with an angled hook, and the second elastic rope is arranged between the piston plate and the swinging tooth plate.

[0015] By limiting the position of the swinging gear plate through the right-angle guide rail, the unfolding direction of the swinging gear plate can be automatically constrained, and the position movement can be completed by slowly retracting the swinging gear plate with the sliding brake steering mechanism.

[0016] Furthermore, the impact testing device includes a pressure-driven component and a rebound tester, wherein the pressure-driven component is arranged on the sliding brake component, and the rebound tester is arranged on the pressure-driven component.

[0017] The pressure drive assembly includes a pressure chamber, a pressure control piston, a pressure drive piston and a piston return spring. The pressure chamber is fixedly connected to the square chamber. The pressure control piston and the pressure drive piston are snap-fitted and slidably arranged in the pressure chamber. The piston return spring is arranged between the pressure control piston and the pressure drive piston.

[0018] The pressure-driven piston can sense the telescopic movement of the impact rod and the linked telescopic rod, and the pressure-driven component is driven by the telescopic movement of the linked telescopic rod. There is a piston return spring between the pressure control piston and the pressure-driven piston, which can avoid jamming due to different telescopic ranges of various positions and components when the liquid is incompressible.

[0019] Preferably, the rebound hammer is fixed to the pressure chamber, one end of the rebound hammer is provided with an impact rod which can telescopically move relative to the shell, and the other end of the rebound hammer is also provided with a linkage telescopic rod linked to the impact rod, and the linkage telescopic rod is in contact with the pressure-driven piston.

[0020] Furthermore, the lifting control assembly includes an object to be measured, a fixed bracket and a guide rail mounting frame, the object to be measured is provided with a grid test area, the fixed bracket is provided with fixed legs, the fixed bracket is arranged on the object to be measured through the fixed legs, and the guide rail mounting frame is fixedly connected to the outer side of the right-angle guide rail.

[0021] Preferably, the lifting control assembly further comprises a lifting motor and a lifting screw, the output shaft of the lifting motor is connected to the lifting screw, a lifting nut is provided on the guide rail mounting frame, and the lifting nut is threadedly connected to the lifting screw.

[0022] By rotating the lifting motor with the lifting screw rod, the guide rail mounting frame and the right-angle guide rail can be lifted and slid relative to the fixed bracket. By providing a ring on the guide rail mounting frame that is lifted along the fixed leg, the stability of the right-angle guide rail when being lifted relative to the fixed bracket can be improved.

[0023] As a further preferred embodiment of the present invention, a avoidance groove is provided on the right-angle guide rail, and the cross cavity, the brake sleeve and the pressure cavity are connected and filled with liquid.

[0024] The beneficial effects achieved by the present invention using the above structure are as follows: (1) By sliding the sliding brake steering mechanism along the right-angle guide rail, the motion trajectory of the impact test device can pass through each small grid of the grid test area, thereby achieving the technical purpose of sequential testing without the need for human intervention in the middle.

[0025] (2) By locking and unlocking the impact test device, the position of the square cavity can be automatically locked and fixed when the rebound tester is pressed, and the swinging tooth plate can be unfolded. When resetting, the movement restriction of the square cavity can be automatically released, and the device can be driven to move a unit distance through the swinging tooth plate.

[0026] (3) Through the structural design of the sliding brake steering mechanism and the shape design of the right-angle guide rail, the sliding brake steering mechanism can automatically move in another direction perpendicular to it after sliding to the extreme position, thereby realizing automatic steering of the sliding brake steering mechanism.

[0027] (4) Through the connection between the cross cavity and the brake sleeve, when the rebound tester is pressed, the brake pad can be extended outward due to the increase in internal pressure of the cross cavity and the brake sleeve, thereby realizing the position locking of the sliding brake steering mechanism and the impact test device, making the position of the rebound tester more fixed during the pressure application process; and when the right-angle guide rail is lifted and reset, the position lock of the square cavity can be released by the retraction of the brake pad.

[0028] (5) By limiting the position of the swinging gear plate through the right-angle guide rail, the direction in which the swinging gear plate is unfolded can be automatically constrained, and the position movement can be completed by slowly retracting the swinging gear plate with the sliding brake steering mechanism.

[0029] (6) The pressure-driven piston can sense the telescopic movement of the impact rod and the linked telescopic rod, and the pressure-driven component can be driven through the telescopic movement of the linked telescopic rod. There is a piston return spring between the pressure control piston and the pressure-driven piston, which can avoid jamming due to different telescopic ranges of various positions and components when the liquid is incompressible.

[0030] (7) By rotating the lifting screw rod with the lifting motor, the guide rail mounting frame and the right-angle guide rail can be lifted and slid relative to the fixed bracket. By providing a ring on the guide rail mounting frame that is lifted and lowered along the fixed leg, the stability of the right-angle guide rail when it is lifted and lowered relative to the fixed bracket can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A partial stereoscopic diagram of a strength detection device for a large-span prestressed concrete beam proposed by the present invention; Figure 2 A partial front view of a strength detection device for a large-span prestressed concrete beam proposed by the present invention; Figure 3 It is a partial left view of a strength detection device for a large-span prestressed concrete beam proposed by the present invention; Figure 4 A partial top view of a strength detection device for a large-span prestressed concrete beam proposed by the present invention; Figure 5 for Figure 3 A cross-sectional view along the cutting line AA; Figure 6 for Figure 3 A cross-sectional view along the cutting line BB; Figure 7 for Figure 2 A cross-sectional view along the cutting line CC; Figure 8 A partial explosion schematic diagram of a strength detection device for a large-span prestressed concrete beam proposed by the present invention; Fig. 9 for Figure 5 A partial enlarged view of point Ⅰ in the middle; Fig.10 for Figure 7 A partial enlarged view of the middle II; Fig.11 A three-dimensional diagram of a strength detection device for a large-span prestressed concrete beam proposed by the present invention; Fig.12 The present invention is a top view of a strength detection device for large-span prestressed concrete beams.

[0032] Among them, 1. Guide rail assembly, 2. Sliding brake steering mechanism, 3. Impact test device, 4. Lifting control assembly, 5. Right-angle guide rail, 6. Guide rail connecting frame, 7. Sliding brake assembly, 8. Pressure sensing assembly, 9. Displacement assembly, 10. Square cavity, 11. Cross cavity, 12. Brake sleeve, 13. Brake grinding pad, 14. Brake reset spring, 15. Pressure relief knob, 16. Fixed column, 17. Piston plate, 18. Pressure pipe, 19. Ratchet row, 20. Swing gear Plate, 21. second elastic rope, 22. first elastic rope, 23. bevel hook, 24. pressure drive assembly, 25. rebound tester, 26. pressure chamber, 27. pressure control piston, 28. pressure drive piston, 29. piston return spring, 30. impact rod, 31. linkage telescopic rod, 32. object to be measured, 33. fixed bracket, 34. guide rail mounting bracket, 35. lifting motor, 36. lifting screw, 37. grid area to be measured, 38. fixed support leg, 39. lifting nut.

[0033] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described 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 the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0036] like Figure 1 to Figure 12As shown, the present invention proposes a strength detection device for large-span prestressed concrete beams, including a guide rail assembly 1, a sliding brake steering mechanism 2, a bullet impact test device 3 and a lifting control assembly 4, the guide rail assembly 1 is arranged on the lifting control assembly 4, the sliding brake steering mechanism 2 is slidably arranged on the guide rail assembly 1, and the bullet impact test device 3 is arranged on the sliding brake steering mechanism 2.

[0037] The guide rail assembly 1 includes a right-angle guide rail 5 and a guide rail connecting frame 6 . The right-angle guide rail 5 is composed of two separate rails. The two parts of the right-angle guide rail 5 are connected by the guide rail connecting frame 6 .

[0038] By sliding the sliding brake steering mechanism 2 along the right-angle guide rail 5, the movement trajectory of the impact test device 3 can pass through each small grid of the grid test area 37, thereby achieving the technical purpose of sequential testing without the need for human intervention in the middle.

[0039] The sliding brake steering mechanism 2 includes a sliding brake component 7, a pressure sensing component 8 and a displacement component 9. The sliding brake component 7 is slidably mounted on the guide rail component 1, the pressure sensing component 8 is disposed in the sliding brake component 7, and the displacement component 9 is disposed on the sliding brake component 7.

[0040] By locking and unlocking the impact test device 3, the position of the square cavity 10 can be automatically locked and fixed when the rebound tester 25 is pressed, and the swinging tooth plate 20 can be unfolded. When resetting, the movement restriction of the square cavity 10 can be automatically released, and the device can be driven to move a unit distance through the swinging tooth plate 20.

[0041] Through the structural design of the sliding brake steering mechanism 2 and the shape design of the right-angle guide rail 5, the sliding brake steering mechanism 2 can automatically move in another direction perpendicular to it after sliding to the extreme position, thereby realizing automatic steering of the sliding brake steering mechanism 2.

[0042] The sliding brake assembly 7 includes a square cavity 10, a cross cavity 11, a brake sleeve 12, a brake grinding plate 13 and a brake reset spring 14. The square cavity 10 is snap-fitted and slidably arranged in the right-angle guide rail 5, the cross cavity 11 is fixedly connected to the inside of the square cavity 10, the brake sleeve 12 is fixedly connected to the inside of the square cavity 10 and the cross cavity 11, the brake grinding plate 13 is snap-fitted and slidably arranged in the brake sleeve 12, and the brake reset spring 14 is arranged between the top of the brake sleeve 12 and the brake grinding plate 13.

[0043] Through the connection between the cross cavity 11 and the brake sleeve 12, when the rebound meter 25 is pressed, the brake grinding plate 13 can be extended outward by the increase of the internal pressure of the cross cavity 11 and the brake sleeve 12, thereby realizing the position locking of the sliding brake steering mechanism 2 and the impact test device 3, so that the position of the rebound meter 25 is more fixed during the pressure application process; and when the right-angle guide rail 5 is lifted and reset, the position locking of the square cavity 10 can be released by the retraction of the brake grinding plate 13.

[0044] The pressure sensing assembly 8 includes a pressure relief knob 15, a fixed column 16, a piston plate 17 and a pressure pipe 18. The pressure relief knob 15 is detachably arranged on the top of the square cavity 10 and the cross cavity 11. The fixed column 16 is fixedly connected to the bottom wall of the cross cavity 11. The fixed column 16 is evenly distributed with a first elastic rope 22 in an annular shape. The piston plate 17 is slidably arranged on the cross cavity 11. The end of the first elastic rope 22 is fixedly connected to the piston plate 17. The pressure pipe 18 is arranged between the brake sleeve 12 and the cross cavity 11. The displacement assembly 9 includes a ratchet row 19, a swinging tooth plate 20 and a second elastic rope 21. The ratchet row 19 is fixedly connected to the right-angle guide rail 5. The swinging tooth plate 20 is rotatably arranged on the piston plate 17. The end of the swinging tooth plate 20 is provided with an angled hook 23. The second elastic rope 21 is arranged between the piston plate 17 and the swinging tooth plate 20.

[0045] The right-angle guide rail 5 limits the position of the swinging gear plate 20, so that the unfolding direction of the swinging gear plate 20 can be automatically constrained, and the position movement of the sliding brake steering mechanism 2 can be completed by slowly retracting the swinging gear plate 20.

[0046] The impact testing device 3 includes a pressure-driven component 24 and a rebound tester 25 . The pressure-driven component 24 is arranged on the sliding brake component 7 , and the rebound tester 25 is arranged on the pressure-driven component 24 .

[0047] The pressure drive assembly 24 includes a pressure chamber 26, a pressure control piston 27, a pressure drive piston 28 and a piston return spring 29. The pressure chamber 26 is fixedly connected to the square chamber 10. The pressure control piston 27 and the pressure drive piston 28 are slidably engaged in the pressure chamber 26. The piston return spring 29 is arranged between the pressure control piston 27 and the pressure drive piston 28.

[0048] The pressure-driven piston 28 can sense the telescopic movement of the impact rod 30 and the linked telescopic rod 31, and the pressure-driven component 24 is driven by the telescopic movement of the linked telescopic rod 31. A piston return spring 29 is provided between the pressure-controlled piston 27 and the pressure-driven piston 28, which can avoid jamming due to different telescopic ranges of various positions and components when the liquid is incompressible.

[0049] The rebound hammer 25 is fixed to the pressure chamber 26 . One end of the rebound hammer 25 is provided with an impact rod 30 that can telescopically move relative to the shell. The other end of the rebound hammer 25 is also provided with a linkage telescopic rod 31 that is linked to the impact rod 30 . The linkage telescopic rod 31 is in contact with the pressure driving piston 28 .

[0050] The lifting control assembly 4 includes an object to be measured 32, a fixed bracket 33 and a guide rail mounting frame 34. A grid test area 37 is provided on the object to be measured 32, and a fixed leg 38 is provided on the fixed bracket 33. The fixed bracket 33 is arranged on the object to be measured 32 through the fixed leg 38. The guide rail mounting frame 34 is fixedly connected to the outer side of the right-angle guide rail 5.

[0051] The lifting control assembly 4 also includes a lifting motor 35 and a lifting screw 36 , the output shaft of the lifting motor 35 is connected to the lifting screw 36 , and a lifting nut 39 is provided on the guide rail mounting frame 34 , and the lifting nut 39 and the lifting screw 36 are threadedly connected.

[0052] By rotating the lifting motor 35 with the lifting screw rod 36, the guide rail mounting frame 34 and the right-angle guide rail 5 can be lifted and slid relative to the fixed bracket 33. By providing a ring on the guide rail mounting frame 34 that is lifted and lowered along the fixed leg 38, the stability of the right-angle guide rail 5 when being lifted and lowered relative to the fixed bracket 33 can be improved.

[0053] The right-angle guide rail 5 is provided with an avoidance groove, and the cross cavity 11, the brake sleeve 12 and the pressure cavity 26 are connected and filled with liquid.

[0054] During specific use, the user first needs to fix the fixed bracket 33 on the surface of the object to be tested 32 through the fixed legs 38, and place the fixed bracket 33 directly above the grid to be tested area 37. When using this device to perform rebound detection on the grids to be tested in the grid to be tested area 37 in turn, it is necessary to drive the lifting screw 36 to rotate through the lifting motor 35, so that the right-angle guide rail 5 can be reciprocated and lifted through the guide rail mounting frame 34.

[0055] When the right-angle guide rail 5 approaches the object to be tested 32, the impact rod 30 on the rebound tester 25 is compressed. When the impact rod 30 is compressed to a certain extent, the impact rod 30 will perform a strength test on the concrete surface in the small grid area of ​​the grid test area 37 through its own small amplitude rapid rebound. Then the right-angle guide rail 5 will move away from the object to be tested 32. During this process, since the extension and reset speed of the impact rod 30 relative to the housing of the rebound tester 25 is slow, the impact rod 30 will never contact the surface of the object to be tested 32 until the right-angle guide rail 5 reaches the farthest position from the object to be tested 32, and then the impact rod 30 will contact the object to be tested 32 again.

[0056] Since the impact rod 30 and the linkage telescopic rod 31 are linked, when the impact rod 30 is squeezed, the linkage telescopic rod 31 will extend from the other end of the rebound tester 25. When the linkage telescopic rod 31 extends, it will press against the pressure driving piston 28, so that the pressure control piston 27 and the pressure driving piston 28 slide. When the pressure control piston 27 slides, the liquid in the pressure chamber 26 will be squeezed into the cross chamber 11. The cross cavity 11 and the brake sleeve 12 are connected through, so the pressure in the cross cavity 11 and the brake sleeve 12 increases together; on the one hand, when the pressure in the brake sleeve 12 increases, the brake grinding plate 13 will extend, and the extrusion pressure and friction force between the brake grinding plate 13 and the right-angle guide rail 5 will increase. At this time, the relative positions of the square cavity 10 and the right-angle guide rail 5 are fixed; on the other hand, when the pressure in the cross cavity 11 increases, the piston plate 17 that is not in a restricted position (that is, along the direction of the right-angle guide rail 5) will extend.

[0057] When the swing tooth plate 20 is extended, the bevel hook 23 and the ratchet row 19 cooperate, so that one of the two swing tooth plates 20 extending along with the piston plate 17 causes the end of the bevel hook 23 to jump upward through the bevel edge of the bevel hook 23, and the other causes the end of the bevel hook 23 to jump upward through the bevel edge of the ratchet teeth of the ratchet row 19; When the impact rod 30 is extended to reset, the linkage telescopic rod 31 will also reset along with the impact rod 30. Because there is sliding friction between the pressure-driven piston 28 and the pressure chamber 26, the pressure-driven piston 28 without support will slowly reset under the elastic force of the first elastic rope 22 and the brake reset spring 14. During this process, on the one hand, the brake pad 13 retracts and the brake of the square chamber 10 is released due to the pressure reduction in the brake sleeve 12, and on the other hand, the piston plate 17 retracts due to the pressure reduction in the cross chamber 11. During the retraction of the piston plate 17, one swinging tooth plate 20 can still allow the bevel hook 23 to jump upward through the slope of the ratchet teeth of the ratchet row 19. This swinging tooth plate 20 does not play a driving role, and the other swinging tooth plate 20, through the combination of the bevel hook 23 and the ratchet row 19, pulls the square cavity 10 to move a unit distance during the retraction of the swinging tooth plate 20 following the piston plate 17. The amplitude of each sliding of the square cavity 10 is related to the grid size of the grid area 37 to be tested.

[0058] In the straight motion section and the turning section, the operation method of the device is the same, and the automatic direction change can be achieved through the design of the sliding brake steering mechanism 2; specifically, the direction of the translational movement of the square cavity 10 is changed according to the different directions of the extended piston plate 17.

[0059] If in the linear motion section, the two piston plates 17 along the motion direction can freely extend and retract, while the piston plates 17 on both sides cannot extend. If in the corner, the two piston plates 17 along the directions of the two sides of the right angle can freely extend and retract, while the other piston plates 17 cannot extend.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0061] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A strength detection device for long-span prestressed concrete beams, characterized in that: The invention comprises a guide rail assembly (1), a sliding brake steering mechanism (2), a spring impact test device (3) and a lifting control assembly (4), wherein the guide rail assembly (1) is arranged on the lifting control assembly (4), the sliding brake steering mechanism (2) is slidably arranged on the guide rail assembly (1), and the spring impact test device (3) is arranged on the sliding brake steering mechanism (2); The sliding brake steering mechanism (2) comprises a sliding brake component (7), a pressure sensing component (8) and a displacement component (9); the sliding brake component (7) is slidably mounted on the guide rail component (1), the pressure sensing component (8) is disposed in the sliding brake component (7), and the displacement component (9) is disposed on the sliding brake component (7); The impact test device (3) comprises a pressure drive component (24) and a rebound tester (25), wherein the pressure drive component (24) is arranged on the sliding brake component (7), and the rebound tester (25) is arranged on the pressure drive component (24); The invention is characterized in that: the guide rail assembly (1) comprises a right-angle guide rail (5) and a guide rail connecting frame (6); the right-angle guide rail (5) is composed of two separate rails, and the two parts of the right-angle guide rail (5) are connected via the guide rail connecting frame (6); The invention is characterized in that: the sliding brake assembly (7) comprises a square cavity (10), a cross cavity (11), a brake sleeve (12), a brake grinding plate (13) and a brake reset spring (14); the square cavity (10) is slidably arranged in the right-angle guide rail (5); the cross cavity (11) is fixedly connected to the inside of the square cavity (10); the brake sleeve (12) is fixedly connected to the inside of the square cavity (10) and the cross cavity (11); the brake grinding plate (13) is slidably arranged in the brake sleeve (12); and the brake reset spring (14) is arranged between the top of the brake sleeve (12) and the brake grinding plate (13).

2. A strength detection device for a large-span prestressed concrete beam according to claim 1, characterized in that: The pressure sensing component (8) comprises a pressure relief knob (15), a fixed column (16), a piston plate (17) and a pressure pipe (18); the pressure relief knob (15) is detachably arranged on the top of the square cavity (10) and the cross cavity (11); the fixed column (16) is fixedly connected to the bottom wall of the cross cavity (11); a first elastic rope (22) is evenly distributed in a ring shape on the fixed column (16); the piston plate (17) is slidably arranged on the cross cavity (11); the end of the first elastic rope (22) is fixedly connected to the piston plate (17); and the pressure pipe (18) is arranged between the brake sleeve (12) and the cross cavity (11).

3. A strength detection device for a large-span prestressed concrete beam according to claim 2, characterized in that: The displacement assembly (9) comprises a ratchet row (19), a swinging tooth plate (20) and a second elastic rope (21); the ratchet row (19) is fixedly connected to the right-angle guide rail (5); the swinging tooth plate (20) is rotatably arranged on the piston plate (17); an angled hook (23) is arranged at the end of the swinging tooth plate (20); and the second elastic rope (21) is arranged between the piston plate (17) and the swinging tooth plate (20).

4. A strength detection device for a large-span prestressed concrete beam according to claim 3, characterized in that: The pressure drive assembly (24) comprises a pressure chamber (26), a pressure control piston (27), a pressure drive piston (28) and a piston return spring (29); the pressure chamber (26) is fixedly connected to the square chamber (10); the pressure control piston (27) and the pressure drive piston (28) are slidably engaged in the pressure chamber (26); and the piston return spring (29) is arranged between the pressure control piston (27) and the pressure drive piston (28).

5. A strength detection device for a large-span prestressed concrete beam according to claim 4, characterized in that: The rebound hammer (25) is fixedly connected to the pressure chamber (26); one end of the rebound hammer (25) is provided with an impact rod (30) that can telescopically move relative to the housing; the other end of the rebound hammer (25) is also provided with a linkage telescopic rod (31) that is linked to the impact rod (30); the linkage telescopic rod (31) is in contact with the pressure driving piston (28).

6. The strength detection device for a large-span prestressed concrete beam according to claim 1, characterized in that: The lifting control assembly (4) comprises an object to be measured (32), a fixed support (33) and a guide rail mounting frame (34); a grid area to be measured (37) is provided on the object to be measured (32); a fixed support leg (38) is provided on the fixed support leg (33); the fixed support (33) is arranged on the object to be measured (32) via the fixed support leg (38); and the guide rail mounting frame (34) is fixedly connected to the outer side of the right-angle guide rail (5).

7. A strength detection device for a large-span prestressed concrete beam according to claim 6, characterized in that: The lifting control assembly (4) further comprises a lifting motor (35) and a lifting screw (36), wherein the output shaft of the lifting motor (35) is connected to the lifting screw (36), and the guide rail mounting frame (34) is provided with a lifting nut (39), and the lifting nut (39) and the lifting screw (36) are threadedly connected.

8. The strength detection device for a large-span prestressed concrete beam according to claim 5, characterized in that: The right-angle guide rail (5) is provided with a relief groove, and the cross cavity (11), the brake sleeve (12) and the pressure cavity (26) are connected and filled with liquid.

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