Pre-construction detection device for steel bar protection layer of high and large formwork

Abstract

The utility model discloses a pre-construction detection device for a steel bar protective layer of a high and large template, which comprises a fixed frame, a detection coil, a detection probe and an external computer, one end of the detection coil is wound on the fixed frame, and the other end of the detection coil is connected with the detection probe and is put down along the edge of the template; the detection probe comprises a shell, an iron triangular plate, a resistance rod, a spring and a conductive fixing piece, a first corner of the iron triangular plate is located outside the shell and connected with the resistance rod, the spring is connected with the iron triangular plate and the shell, the resistance rod is in sliding connection with the conductive fixing piece, and transverse stretching and retracting of the resistance rod are achieved; the fixing frame is provided with an external interface, an external computer is connected with the detection coil through the external interface, the current inlet wire is connected with the conductive fixing piece, and the current outlet wire is connected with the end of the resistance rod arranged at the first corner. According to the utility model, the lowering length of the detection probe is utilized to solve the safety risk that an acceptance worker climbs a reinforcing mesh to check a reinforcing protective layer before pouring of a high and large template, and the qualification rate is more quickly counted by utilizing an oscillogram issued by an external computer.

Description

Technical Field

[0001] The utility model relates to the field of steel bar protection layer thickness detection, and more specifically, to a pre-construction detection device for a steel bar protection layer of a tall formwork. Background Art

[0002] At present, water transport projects mostly adopt the integral cast-in-place process, and the one-time casting height can generally reach more than 9 meters. The high height makes it difficult for personnel to enter the warehouse, which makes safety accidents prone to occur. The tall column structure on the bridge has dense steel bars, and personnel cannot enter to detect the steel bar protection layer. The use of the rod insertion method for detection cannot accurately obtain the steel protection qualification rate, and it is easy to cause the lower part to be unable to detect due to inaccurate individual steel bar protection layers. The downward steel bar protection layer detection of the present invention forms a device that reduces the safety risks of personnel entering the warehouse for detection, and achieves the situation that personnel do not need to enter the warehouse to climb and detect the steel bar protection layer under the condition of tall formwork, avoiding the safety risks of personnel climbing the steel mesh, and at the same time effectively improves the qualification rate of the concrete protection layer, meeting the quality requirements of high-quality projects. Utility Model Content

[0003] The purpose of the utility model is to provide a pre-construction detection device for the steel bar protective layer of a large formwork, which utilizes the lowering length of the detection probe to solve the safety risk of acceptance personnel climbing the steel mesh to check the steel bar protective layer before pouring the large formwork, and utilizes the waveform diagram produced by an external computer to more quickly perform pass rate statistics.

[0004] The technical solution adopted by the utility model to solve this technical problem is: providing a pre-construction detection device for the steel bar protective layer of a tall template, including a fixing frame, a detection coil, a detection probe and an external computer, wherein the fixing frame is placed on the top of the template, one end of the detection coil is wound on the fixing frame, and the other end is connected to the detection probe, and the detection probe is placed close to the edge of the template;

[0005] The detection probe comprises a shell, an iron triangle, a resistance rod, a spring and a conductive fixing part, the iron triangle comprises a first angle, a second angle and a third angle, the second angle and the third angle are located on the same vertical plane and are arranged inside the shell, the first angle is located outside the shell and connected to the resistance rod, one end of the two springs is respectively connected to the second angle and the third angle, and the other end is fixed to the shell, the conductive fixing part is fixed inside the shell, the resistance rod passes through the conductive fixing part and is slidably connected to the conductive fixing part, so as to realize the lateral extension and contraction of the resistance rod;

[0006] The fixing frame is provided with an external interface, the external computer is connected to the detection coil via the external interface, the detection coil is wrapped with a current input line and a current output line, the current input line is connected to the conductive fixing piece, and the current output line is connected to the end of the resistance rod located at the first corner.

[0007] Preferably, in the pre-construction detection device for the steel bar protective layer of the tall formwork, the maximum transverse length of the detection probe is greater than the maximum thickness allowed by the steel bar protective layer specification, and the minimum transverse length of the detection probe is less than the minimum thickness allowed by the steel bar protective layer specification.

[0008] Preferably, in the pre-construction detection device for the protective layer of steel bars of tall formwork, the detection coil is marked with scale values.

[0009] Preferably, in the pre-construction detection device for the steel bar protective layer of the tall formwork, the spring is fixed to the iron triangle piece by a spring connecting bolt.

[0010] The utility model at least has the following beneficial effects:

[0011] 1. By adjusting the length of the detection probe, the protective layer of the steel bars of large structures can be inspected before pouring, which can solve the safety risk of inspection personnel climbing the steel mesh to inspect the protective layer of the steel bars before pouring the large structures.

[0012] 2. In order to solve the problem that the qualified rate of the steel bar protective layer after the formwork is erected is difficult to detect and calculate the qualified rate, the waveform diagram issued by the external detection equipment is used to more conveniently and quickly calculate the qualified rate.

[0013] 3. All testing equipment is operated on the platform on the top of the template, which greatly improves the testing efficiency.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of a pre-construction detection device for a high and large template steel bar protective layer of the utility model;

[0016] Figure 2 This is a partial structural diagram of a pre-construction detection device for a high-rise template steel bar protective layer of the utility model;

[0017] Figure 3 This is a structural diagram of a detection probe in a pre-construction detection device for a protective layer of steel bars of a tall formwork according to the utility model;

[0018] Explanation of the accompanying reference numerals: 1. fixing frame, 2. detection coil, 3. detection probe, 4. template, 5. external computer, 6. external interface, 7. housing, 8. current input line, 9. current output line, 10. resistance rod, 11. conductive fixing part, 12. spring, 13. iron triangle piece, 131. first corner, 132. second corner, 133. third corner, 14. spring connecting bolt, 15. steel skeleton distribution ribs. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0020] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0021] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0022] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0023] like Figure 1-3 As shown, a preferred embodiment of the utility model provides a pre-construction detection device for a steel bar protective layer of a tall template, comprising a fixing frame 1, a detection coil 2, a detection probe 3 and an external computer 5, wherein the fixing frame 1 is placed on the top of a template 4, one end of the detection coil 2 is wound around the fixing frame 1, and the other end is connected to the detection probe 3, and the detection probe 3 is placed close to the edge of the template 4;

[0024] The detection probe 3 includes a shell 7, an iron triangular piece 13, a resistor rod 10, a spring 12 and a conductive fixing piece 11. The iron triangular piece 13 includes a first corner 131, a second corner 132 and a third corner 133. The second corner 132 and the third corner 133 are located on the same vertical plane and are arranged inside the shell 7. The first corner 131 is located outside the shell 7 and connected to the resistor rod 10. One end of the two springs 12 is respectively connected to the second corner 132 and the third corner 133, and the other end is fixed to the shell 7. The conductive fixing piece 11 is fixed inside the shell 7. The resistor rod 10 passes through the conductive fixing piece 11 and is slidably connected to the conductive fixing piece 11 to achieve lateral extension and contraction of the resistor rod 10. In this embodiment, a preferred implementation scheme is that the detection probe 3 has a certain weight so that the detection probe 3 can be lowered smoothly.

[0025] The fixing frame 1 is provided with an external interface 6, and the external computer 5 is connected to the detection coil 2 via the external interface 6. The detection coil 2 is wrapped with a current input line 8 and a current output line 9. The current input line 8 is connected to the conductive fixing part 11, and the current output line 9 is connected to the end of the resistance rod 10 located at the first corner 131.

[0026] In the above technical scheme, a fixing frame 1 is fixed to a template 4, and a detection probe 3 is connected through a detection coil 2 and lowered close to the template 4. The iron triangle piece 13 and the spring 12 on the detection probe 3 are squeezed with the distribution ribs 15 of the steel skeleton, so that the resistance rod 10 is expanded and contracted. The external computer 5 connected to the detection coil 2 transmits current, and the expansion and contraction of the resistance rod 10 produces a change in current value. The external computer 5 collects the current change and generates a waveform diagram, thereby realizing the detection and data analysis of the thickness of the steel bar protective layer, judging whether the thickness of the steel bar protective layer is within the specified range, and more conveniently and quickly performing qualified rate statistics.

[0027] Furthermore, in the pre-construction detection device for the steel bar protective layer of the tall formwork, the maximum transverse length of the detection probe 3 is greater than the maximum thickness allowed by the steel bar protective layer specification, and the minimum transverse length of the detection probe 3 is less than the minimum thickness allowed by the steel bar protective layer specification, so that there is a change in the current value during the lifting process of the detection probe 3.

[0028] Furthermore, in the pre-construction detection device for the steel bar protective layer of the tall formwork, the detection coil 2 is marked with a scale value, and the scale value can be used to determine whether the detection probe 3 has reached the bottom of the tall formwork 4.

[0029] Furthermore, in the pre-construction detection device for the steel bar protective layer of the tall formwork, the spring 12 is fixed to the iron triangle piece 13 by a spring connecting bolt 14.

[0030] The utility model also provides a method for pre-construction detection of a high and large formwork steel bar protective layer, comprising the following steps:

[0031] Step 1: Fix the detection coil 2.

[0032] Step 2: Connect the detection coil 2 to the detection probe 3 and the external computer 5.

[0033] Step 3: Lower the detection probe 3 along the edge of the template 4 to the bottom of the tall template 4.

[0034] Step 4: Determine whether it is placed at the bottom of the tall template 4 by observing the scale value on the detection coil 2.

[0035] Step 5: Turn on the external computer 5 to provide the detection current.

[0036] Step 6: Rotate the detection coil 2 and lift the detection probe 3 at a constant speed.

[0037] Step 7: By squeezing the detection probe 3 and the steel skeleton distribution bar 15, the current value change caused by the expansion and contraction of the resistor rod 10 is transmitted to the external computer 5, a waveform diagram is generated, the qualified rate of the steel bar protection layer is obtained, and the data is analyzed.

[0038] Step 8: Lift the detection probe 3 to the top of the template 4 and replace the next detection surface.

[0039] Step 9: Adjust the unqualified points of the structural steel bar skeleton through data analysis of the qualified rate of the steel bar protective layer.

[0040] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A pre-construction detection device for a tall formwork steel bar protective layer, characterized in that: It includes a fixing frame, a detection coil, a detection probe and an external computer. The fixing frame is placed on the top of the template. One end of the detection coil is wound around the fixing frame, and the other end is connected to the detection probe. The detection probe is placed close to the edge of the template. The detection probe comprises a shell, an iron triangle, a resistance rod, a spring and a conductive fixing part, the iron triangle comprises a first angle, a second angle and a third angle, the second angle and the third angle are located on the same vertical plane and are arranged inside the shell, the first angle is located outside the shell and connected to the resistance rod, one end of the two springs is respectively connected to the second angle and the third angle, and the other end is fixed to the shell, the conductive fixing part is fixed inside the shell, the resistance rod passes through the conductive fixing part and is slidably connected to the conductive fixing part, so as to realize the lateral extension and contraction of the resistance rod; The fixing frame is provided with an external interface, and the external computer is connected to the detection coil via the external interface. The detection coil is wrapped with a current input line and a current output line, and the current input line is connected to the conductive fixing part, and the current output line is connected to the end of the resistance rod located at the first corner.

2. The pre-construction detection device for the protective layer of the steel bar of the large formwork according to claim 1 is characterized in that: The maximum transverse length of the detection probe is greater than the maximum thickness allowed by the steel bar protection layer specification, and the minimum transverse length of the detection probe is less than the minimum thickness allowed by the steel bar protection layer specification.

3. The pre-construction detection device for the protective layer of steel bars of a large formwork as claimed in claim 1 is characterized in that: The detection coil is marked with scale values.

4. The pre-construction detection device for the protective layer of steel bars of a large formwork as claimed in claim 1 is characterized in that: The spring is fixed on the iron triangle piece through spring connecting bolts.

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