Detection area combined concrete quality detection rebound apparatus

Abstract

The invention relates to a testing area combined type concrete quality detection rebound apparatus, which comprises a plurality of testing units arranged in parallel and used for testing a plurality of point positions in batches, each testing unit comprises a shell, a pull rod arranged in the shell in a sliding manner, a bouncing rod fixedly connected with the pull rod, a bouncing hammer and a bouncing tension spring, and a sealing pipe is also arranged in the shell. According to the combined type electromagnetic power concrete quality detection rebound apparatus, the rebound apparatus can be carried through an excavator, a bucket of the excavator is replaced by the rebound apparatus, bouncing tests of multiple point positions of each high-altitude detection area can be rapidly completed, the function of continuously launching bouncing rods can be achieved, manual work is not completely relied on, and the working efficiency is improved. Labor intensity of detection personnel is reduced, high-altitude scaffold building is not needed, and the instrument is flexible and accurate in operation and positioning and good in safety.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete detection, and in particular relates to a measuring area combined concrete quality detection rebound tester. Background Art

[0002] The concrete rebound test hammer is a testing device suitable for testing the strength of general building components, bridges and various concrete components (slabs, beams, columns, and bridge frames). Its main technical indicators include impact function, spring stiffness, hammer stroke, maximum static friction of the pointer system and average rigidity. The working principle of the concrete rebound test hammer is to use a spring to drive the hammer and hit the concrete surface through the impact rod. The restoring force of the instantaneous elastic deformation generated causes the hammer to drive the pointer to rebound, and the pointer indicates the rebound distance. The rebound value (the ratio of the rebound distance to the distance between the hammer and the impact rod before the impact, calculated as a percentage) is used as one of the indicators related to the compressive strength of concrete to infer the compressive strength of concrete.

[0003] The existing rebound tester is generally a single-unit rebound tester. During the whole process of operating the rebound tester, attention should be paid to the posture of holding the rebound tester. One hand holds the middle part of the rebound tester to play a role in straightening; the other hand holds the tail of the instrument to apply pressure to the instrument, which also plays an auxiliary straightening role. This test method is prone to errors due to improper operation, and when the number of rebound values ​​to be tested is large according to the needs, the above test method is less efficient. Summary of the invention

[0004] The purpose of the present invention is to provide a combined concrete quality testing rebound tester for solving the above-mentioned problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A combined concrete quality inspection rebound hammer for measuring area includes a plurality of test units connected in parallel to each other, and is used for batch testing of multiple points in the measuring area. The test unit includes a shell, a pull rod slidably arranged in the shell, a striking rod fixedly connected to the pull rod, a striking hammer, a striking tension spring, and a driving device for driving the pull rod and the striking hammer into a firing position; a connecting arm is also provided on the surface of the rebound hammer, which is used to connect with a lifting tool so that the rebound hammer is sent to a high altitude by the lifting tool to inspect concrete.

[0007] As a further optimization scheme of the present invention, a central conduit is arranged in the shell, and the inner side of the central conduit slides in cooperation with the pull rod. The impact rod is a cylindrical structure with a single-end opening. One end of the central conduit slides into the interior of the impact rod. The impact hammer is arranged on the outside of the central conduit and is pushed by the impact rod to store force. The impact tension spring is connected between the impact hammer and the shell. The purpose of setting the central conduit is to guide the pull rod, so that the pull rod is more stable when impacting.

[0008] As a further optimization scheme of the present invention, a buffer spring is arranged inside the impact rod, and the impact rod is limited and slid by a clamping ring arranged at the opening of the shell. The buffer spring is used to delay the impact of the impact rod on the central catheter when it is rebounded.

[0009] As a further optimization scheme of the present invention, the rebound tester also includes a sealing assembly, a sealing tube is also arranged in the shell, the sealing assembly is slidably arranged in the sealing tube and connected to the pull rod, and is used to pull the pull rod through negative pressure; the driving device is connected to the sealing tube, including a negative pressure driving chamber, an electromagnet and a sealing plate driven by the electromagnet to change the air pressure are arranged in the negative pressure driving chamber, a guide rail is also arranged in the negative pressure driving chamber to limit the sliding of the sealing plate, an armature corresponding to the electromagnet is arranged on the surface of the sealing plate, and a return spring for driving the sealing plate to slide in the pressurization direction is also arranged in the negative pressure driving chamber.

[0010] As a further optimization scheme of the present invention, the negative pressure driving chamber is also provided with an air valve, which is used to eliminate the pressure difference between the inside and outside of the negative pressure driving chamber to prevent the positive and negative pressures from affecting the ejection of the impact rod.

[0011] As a further optimization scheme of the present invention, the sealing assembly includes a first limit plate and a second limit plate arranged at the end of the pull rod, and a two-section groove of large and small sizes is provided between the first limit plate and the second limit plate, and an elastic sealing ring is sleeved in the groove. By setting the two-end groove, the groove is made gourd-shaped. When the elastic sealing ring enters the groove section with a larger radius, it is squeezed and pressed against the inner wall of the sealing tube. Under the action of negative pressure, a piston with a sealing function is formed between the second limit plate. When the elastic sealing ring enters the groove section with a smaller radius, the elastic sealing ring retracts without contacting the inner wall of the sealing tube, which helps to prevent the influence of friction when the pull rod is struck out.

[0012] As a further optimization scheme of the present invention, a locking mechanism for locking the spring hammer is arranged in the shell, and the locking mechanism includes an articulated seat arranged on the surface of the sealing tube and an articulated rod arranged on the articulated seat. One end of the articulated rod is provided with a one-way hook, and the other end is restricted by a toothed rod slidably arranged on the outer surface of the sealing tube. The one-way hook corresponds to the hook claw arranged on the surface of the spring hammer to fix the spring hammer. The toothed rod is driven through the transmission structure to release the restriction of the articulated rod when the sealing plate is reset. By setting the locking mechanism, the sealing plate releases the restriction on the articulated rod when it is reset. The one-way hook drives the articulated rod to rotate after being pulled by the spring hammer, so that the one-way hook disengages from the hook claw, thereby achieving the effect of automatically releasing the spring hammer.

[0013] As a further optimization scheme of the present invention, the transmission structure includes a sliding rod that is slidably connected between the shell and the negative pressure driving chamber, a limiting ring is provided on the surface of the sliding rod to form a one-way valve plate, a rack is provided at the end of the sliding rod entering the shell, and the rack rod and the rack are meshed with the same gear. The transmission structure is driven by the sealing plate by entering the negative pressure driving chamber, thereby solving the problem of complex independent driving.

[0014] As a further optimization scheme of the present invention, the surface of the sealing plate is provided with a guide member extending into the sealing tube and an extrusion rod provided on the surface of the guide member, and the surface of the second limiting plate is provided with a through hole so that the extrusion rod enters the through hole to squeeze the elastic sealing ring into the other section of the slot. This scheme switches the elastic sealing ring by moving the sealing plate so that the elastic sealing ring releases its sealing effect, and after breaking away from the contact with the sealing tube, reduces friction, thereby reducing the impact on the pull rod when it is struck out.

[0015] As a further optimization scheme of the present invention, an indicating mechanism is also arranged in the shell, and the indicating mechanism includes a pointer shaft, a measuring slider and a spring sheet. The indicating mechanism is a prior art, and is used to drive the measuring slider to slide through the rebound of the impact hammer, and then measure the rebound value.

[0016] The beneficial effects of the present invention are:

[0017] (1) The combined electromagnetic power concrete quality inspection rebound tester of the measuring area of ​​the present invention can be carried by an excavator, and the excavator bucket is replaced with the rebound tester, which can quickly complete the impact test of multiple points in each measuring area at high altitude, and can realize the function of continuously firing the impact rod, which does not rely entirely on manual labor, reduces the labor intensity of the inspection personnel, does not require the construction of scaffolding at high altitude, and the instrument operation and positioning are flexible and accurate, and the safety is good;

[0018] (2) Multiple pull rods can be driven to move by negative pressure through one electromagnet, and the pneumatic drive structure makes up for the shortcoming of the electromagnetic drive stroke, so that the pulling stroke of the pull rod is large, which is more conducive to measuring the rebound value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a schematic diagram of a test unit of the present invention;

[0021] Figure 3 The present invention Figure 2 A magnified view of the structure of part A;

[0022] Figure 4 The present invention Figure 2 A magnified view of the structure of part B;

[0023] Figure 5 The present invention Figure 2 A magnified view of the structure of part C in the middle;

[0024] Figure 6 The present invention Figure 4 Middle DD view;

[0025] Figure 7 The present invention Figure 4 Middle EE view;

[0026] Figure 8 It is a schematic diagram of the use of the present invention;

[0027] In the figure: 1. test unit; 11. housing; 12. sealing tube; 13. central guide tube; 14. pull rod; 15. spring hammer; 16. hook; 17. spring rod; 18. spring spring; 19. snap ring; 110. buffer spring; 2. drive device; 21. negative pressure drive chamber; 22. sealing plate; 23. electromagnet; 24. armature; 25. guide rail; 26. return spring; 27. air valve; 28. guide member; 29. ​​extrusion rod; 3. locking mechanism; 31. slide Rod; 32. Limiting ring; 33. Sealing ring; 34. Rack; 35. Gear; 36. Tooth rod; 37. Articulated seat; 38. Articulated rod; 39. One-way hook; 4. Sealing assembly; 41. First limiting plate; 42. Second limiting plate; 43. Through hole; 44. Slot; 45. Elastic sealing ring; 46. Protrusion; 5. Indicating mechanism; 51. Pointer shaft; 52. Measuring slide; 53. Spring sheet; 6. Junction box; 7. Connecting arm; 8. Excavator; 9. Hydraulic arm. DETAILED DESCRIPTION

[0028] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0029] Example 1

[0030] like Figure 1-8 As shown, a combined concrete quality testing hammer tester includes:

[0031] Several test units 1 are arranged in parallel for testing multiple points in batches. A connecting arm 7 is also arranged on the surface of the rebound hammer, which is used to connect with a lifting tool so that the rebound hammer is sent to a high altitude by the lifting tool to test concrete. The test unit 1 includes a housing 11, a pull rod 14 slidably arranged in the housing 11, a striking rod 17 fixedly connected to the pull rod 14, a striking hammer 15 and a striking tension spring 18. A sealing tube 12 is also arranged in the housing 11;

[0032] A sealing assembly 4 is slidably disposed in the sealing tube 12 and connected to the pull rod 14, and is used to pull the pull rod 14 through negative pressure;

[0033] The driving device 2 is connected to the sealing tube 12 and includes a negative pressure driving chamber 21 , in which an electromagnet 23 and a sealing plate 22 driven by the electromagnet 23 to change the air pressure are arranged.

[0034] This solution can perform batch operations through the excavator 8 by setting up multiple parallel test units 1. By adopting a hybrid electromagnetic and pneumatic driving method, the impact hammer 15 and the impact rod 17 are put into the firing position. A single electromagnet 23 can drive multiple pull rods 14 to move through negative pressure, and the pneumatic driving structure makes up for the shortcoming of the short electromagnetic driving stroke, so that the pulling stroke of the pull rod 14 is large, which is more conducive to measuring the rebound value.

[0035] The sealing tube 12 coaxially extends out of the central conduit 13, and the inner side of the central conduit 13 cooperates with the pull rod 14 to slide. The impact rod 17 is a cylindrical structure with a single end opening. One end of the central conduit 13 slides into the interior of the impact rod 17. The impact hammer 15 is sleeved on the outside of the central conduit 13 and is pushed by the impact rod 17 to store force. The impact tension spring 18 is connected between the impact hammer 15 and the housing 11. The central conduit 13 is provided to guide the pull rod 14, so that the pull rod 14 is more stable when impacting. Specifically, Figure 2 Shown and Figure 5 As shown, the bottom of the pull rod 14 is fixedly connected to the impact rod 17. When the pull rod 14 moves upward, the impact rod 17 is pulled upward, and the upper edge of the impact rod 17 pushes the impact hammer 15 to slide upward, and the central guide tube 13 enters the interior of the impact rod 17 to slide.

[0036] A buffer spring 110 is arranged inside the impact rod 17. The impact rod 17 is limited in sliding by a clamping ring 19 arranged at the opening of the shell 11. The buffer spring 110 is used to delay the impact of the impact rod 17 on the central conduit 13 when it is rebounded.

[0037] A guide rail 25 is also provided in the negative pressure driving chamber 21 to limit the sliding of the sealing plate 22. An armature 24 corresponding to the electromagnet 23 is provided on the surface of the sealing plate 22. A return spring 26 for driving the sealing plate 22 to slide in the pressurization direction is also provided in the negative pressure driving chamber 21. In this scheme, the guide rail 25 is provided in the negative pressure driving chamber 21 to make the sliding of the sealing plate 22 more stable, and the return spring 26 is used to reset the sealing plate 22 so that the sealing plate 22 can return to its initial position when the electromagnet 23 loses its suction.

[0038] The negative pressure driving chamber 21 is also provided with an air valve 27, which is used to eliminate the pressure difference between the inside and outside of the negative pressure driving chamber 21 to prevent the positive and negative pressures from affecting the ejection of the impact rod 17.

[0039] The sealing assembly 4 includes a first limiting plate 41 and a second limiting plate 42 disposed at the ends of the pull rod 14. A two-stage card slot 44 of large and small is disposed between the first limiting plate 41 and the second limiting plate 42. An elastic sealing ring 45 is sleeved in the card slot 44. By providing the two-end card slot 44, as shown in FIG. Figure 4 As shown, the slot 44 is gourd-shaped. When the elastic sealing ring 45 enters the slot section with a larger radius, the elastic sealing ring 45 is squeezed and pressed against the inner wall of the sealing tube 12. Under the action of negative pressure, a piston with a sealing function is formed between the elastic sealing ring 45 and the second limiting plate 42. When the elastic sealing ring 45 enters the slot section with a smaller radius, it is closer to the first limiting plate 41, and the elastic seal 45 retracts without contacting the inner wall of the sealing tube 12, which helps to prevent the influence of friction when the pull rod 14 is struck out. In order to make the elastic sealing ring 45 return to a section of the slot 44 close to the second limiting plate 42 when the sealing assembly 4 moves downward, a protrusion 46 is set on the inner wall of the sealing tube 12, so that the elastic sealing ring 45 can act as a piston again when the sealing tube 12 generates negative pressure next time.

[0040] A locking mechanism 3 for locking the impact hammer 15 is provided in the shell 11. The locking mechanism 3 includes an articulated seat 37 arranged on the surface of the sealing tube 12 and an articulated rod 38 arranged on the articulated seat 37. One end of the articulated rod 38 is provided with a one-way hook 39, and the other end is restricted by a toothed rod 36 slidably arranged on the outer surface of the sealing tube 12. The one-way hook 39 corresponds to a hook claw 16 arranged on the surface of the impact hammer 15 to fix the impact hammer 15. The toothed rod 36 is driven through the transmission structure to release the restriction of the articulated rod 38 when the sealing plate 22 is reset. By setting the locking mechanism 3, the sealing plate 22 releases the restriction on the articulated rod 38 when it is reset. The one-way hook 39 drives the articulated rod 38 to rotate after being pulled by the impact hammer 15, so that the one-way hook 39 is disengaged from the hook claw, thereby achieving the effect of automatically releasing the impact hammer 15.

[0041] The transmission structure includes a slide rod 31 that penetrates and slides between the housing 11 and the negative pressure driving chamber 21. A limit ring 32 is provided on the surface of the slide rod 31 to form a one-way valve plate. A rack 34 is provided at one end of the slide rod 31 that enters the housing 11. A gear 35 is meshed between the gear rod 36 and the rack 34. The transmission structure is driven by the sealing plate 22 by entering the negative pressure driving chamber 21, thereby solving the problem that independent driving is relatively complicated. Specifically, Figure 3 As shown, a sealing ring 33 is also provided on the surface of the limiting ring 32. When the sealing plate 22 moves upward, the sliding rod 31 moves upward due to pressure, and the corresponding gear rod 36 slides downward. Figure 4As shown, the gear rod 36 slides downward and presses against the upper part of the hinge rod 38, so that the hinge rod 38 cannot rotate in the clockwise direction, so that the one-way hook 39 is aligned with the hook claw 16. Conversely, when the slide rod 31 is pressed down by the sealing plate 22, the gear rod 36 moves up, and the hinge rod 38 can rotate clockwise to make the one-way hook 39 disengage from the hook claw 16, thereby achieving the purpose of releasing the impact hammer 15.

[0042] The surface of the sealing plate 22 is provided with a guide member 28 extending into the sealing tube 12 and an extrusion rod 29 arranged on the surface of the guide member 28. The surface of the second limiting plate 42 is provided with a through hole 43, so that the extrusion rod 29 enters the through hole 43 to squeeze the elastic sealing ring 45 into the other end of the slot 44. This scheme switches the elastic sealing ring 45 by moving the sealing plate 22, so that the elastic sealing ring 45 releases its sealing effect, and reduces the friction after being out of contact with the sealing tube 12, thereby reducing the impact on the pull rod 14 when it is struck out.

[0043] An indicating mechanism 5 is also provided in the housing 11. The indicating mechanism 5 includes a pointer shaft 51, a measuring slider 52 and a spring sheet 53. The indicating mechanism is a prior art, which is used to drive the measuring slider to slide through the rebound of the impact hammer, and then measure the rebound value.

[0044] It should be noted that for some sliding devices, it is necessary to set a limit to prevent them from rotating when sliding, which will not be described in detail here, for example, between the sealing assembly 4 and the sealing tube 12.

[0045] The specific implementation method is as follows: the measuring area should be selected on the concrete pouring side where the rebound tester can be in a horizontal direction. By setting a connecting arm 7 outside the negative pressure driving chamber 21 to connect with the hydraulic arm 9 of the excavator 8, the testing device is used to test the concrete. A junction box 6 is also required to control related electrical components. When in use, a negative pressure is formed by moving the sealing plate 22, and the sealing component 4 in the sealing tube 12 is driven upward by the negative pressure, and drives the spring hammer 15 to move in the direction of storing force of the spring tension spring 18, and is restricted by the one-way hook 39 to enter the firing position, and is controlled by the excavator 8 to The shell 11 is aligned with the concrete surface, and the electromagnet 23 releases the armature 24. Under the push of the return spring 26, the sealing plate 22 rebounds quickly, and the elastic sealing ring 45 is pushed to the end of the slot 44 close to the second limit plate 41 by the extrusion rod 29, and the air valve 27 is opened to discharge the excess gas. Then the sealing plate 22 squeezes the slide bar 31 to unlock the one-way hook 39 to complete the firing. When rebounding, the hammer 15 drives the measuring slider 52 to move by contacting the elastic sheet 53, and then the rebound distance of the measuring slider 52 is recorded by other means to obtain the experimental results.

[0046] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A combined concrete quality testing rebound tester, characterized in that: The invention comprises a plurality of test units (1) connected in parallel to each other, and is used for batch testing of a plurality of points in a test area. The test unit (1) comprises a housing (11), a pull rod (14) slidably arranged in the housing (11), a firing rod (17) fixedly connected to the pull rod (14), a firing hammer (15), a firing tension spring (18), and a driving device (2) for driving the pull rod (14) and the firing hammer (15) to enter a firing position. The surface of the rebound hammer is also provided with a connecting arm (7) which is used to be connected to a lifting tool so that the rebound hammer can be sent to a high altitude by the lifting tool to detect concrete.

2. The combined concrete quality testing rebound tester according to claim 1, characterized in that: A central conduit (13) is provided in the shell (11), and the inner side of the central conduit (13) slides in cooperation with the pull rod (14). The impact rod (17) is a cylindrical structure with a single end opening. One end of the central conduit (13) slides into the interior of the impact rod (17). The impact hammer (15) is sleeved on the outside of the central conduit (13) and is pushed by the impact rod (17) to store force. The impact tension spring (18) is connected between the impact hammer (15) and the shell (11).

3. The combined concrete quality testing rebound tester according to claim 2, characterized in that: A buffer spring (110) is arranged inside the impact rod (17), and the impact rod (17) is limited in sliding movement by a clamping ring (19) arranged at the opening of the housing (11).

4. The combined concrete quality testing rebound tester according to claim 1, characterized in that: The rebound tester also includes a sealing component (4), a sealing tube (12) is also arranged in the shell (11), the sealing component (4) is slidably arranged in the sealing tube (12) and connected to the pull rod (14), and is used to pull the pull rod (14) through negative pressure; the driving device (2) is connected to the sealing tube (12), including a negative pressure driving chamber (21), an electromagnet (23) and a sealing plate (22) driven by the electromagnet (23) to change the air pressure are arranged in the negative pressure driving chamber (21), a guide rail (25) is also arranged in the negative pressure driving chamber (21) to limit the sliding of the sealing plate (22), the surface of the sealing plate (22) is provided with an armature (24) corresponding to the electromagnet (23), and a return spring (26) is also arranged in the negative pressure driving chamber (21) for driving the sealing plate (22) to slide in the boosting direction.

5. The combined concrete quality testing rebound tester according to claim 4, characterized in that: The negative pressure driving chamber (21) is also provided with an air valve (27).

6. The combined concrete quality testing rebound tester according to claim 4, characterized in that: The sealing assembly (4) comprises a first limiting plate (41) and a second limiting plate (42) arranged at the end of the pull rod (14); a large and a small two-stage clamping groove (44) is arranged between the first limiting plate (41) and the second limiting plate (42); and an elastic sealing ring (45) is sleeved in the clamping groove (44).

7. The combined concrete quality testing rebound tester according to claim 6, characterized in that: A locking mechanism (3) for locking the impact hammer (15) is arranged in the housing (11), and the locking mechanism (3) comprises a hinge seat (37) arranged on the surface of the sealing tube (12), and a hinge rod (38) arranged on the hinge seat (37); one end of the hinge rod (38) is provided with a one-way hook (39), and the other end is restricted by a toothed rod (36) slidably arranged on the outer surface of the sealing tube (12); the one-way hook (39) corresponds to a hook claw (16) arranged on the surface of the impact hammer (15) to fix the impact hammer (15); and the toothed rod (36) is driven through a transmission structure when the sealing plate (22) is reset to release the restriction of the hinge rod (38).

8. The combined concrete quality testing rebound test hammer according to claim 7, characterized in that: The transmission structure comprises a sliding rod (31) that penetrates through the housing (11) and is slidably connected to the negative pressure driving chamber (21); a limit ring (32) is provided on the surface of the sliding rod (31) to form a one-way valve plate; a rack (34) is provided at one end of the sliding rod (31) that enters the housing (11); and a same gear (35) is meshed between the rack rod (36) and the rack (34).

9. The combined concrete quality testing rebound test hammer according to claim 6, characterized in that: The surface of the sealing plate (22) is provided with a guide member (28) extending into the sealing tube (12) and an extrusion rod (29) arranged on the surface of the guide member (28); the surface of the second limiting plate (42) is provided with a through hole (43) so that the extrusion rod (29) enters the through hole (43) to squeeze the elastic sealing ring (45) into the other end of the slot (44).

10. The combined concrete quality testing rebound tester according to claim 1, characterized in that: The housing (11) is also provided with an indicating mechanism (5), which comprises a pointer shaft (51), a measuring slide block (52) and a spring sheet (53).

Images