Device for detecting grouting compactness of prestressed duct of bridge

Abstract

The invention relates to the technical field of bridge detection, in particular to a bridge prestressed duct grouting compactness detection device. Comprising a supporting table, a supporting sleeve, a support, a fixing sleeve, a signal analyzer, two electric push rods, a sliding rod, a limiting ring, two first locking blocks, two check blocks, an impact hammer, a mounting base, a locking assembly, a plurality of first telescopic rods and a first spring, and a detection probe is arranged at the output end of each first telescopic rod. According to the utility model, self-locking is realized under the action of the stop block and the locking assembly, the detection probe is attached to the detected part, then the locking assembly is controlled, the impact hammer instantly knocks the detected part under the action of the first spring, and at the moment, the detection probe transmits a signal to the signal analyzer through the wire; and the signal analyzer can automatically process and analyze data, so that the requirements of manual intervention and judgment are reduced, and the detection efficiency and accuracy are improved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge detection, and in particular to a device for detecting the compactness of grouting of prestressed ducts of bridges. Background Art

[0002] Prestressing is the compressive stress applied to the structure in advance during construction in order to improve the service performance of the structure. The prestressed compressive stress during the service period of the structure can fully or partially offset the tensile stress caused by the load and avoid structural damage. It is often used in concrete structures. Prestressed concrete structures are structures that are pre-pressed before the structure is subjected to loads, so that the internal force of the concrete in the tensile zone under the action of external loads produces compressive stress to offset or reduce the tensile stress caused by external loads, so that the structure will not crack or crack later under normal use. There are generally multiple prestressed holes on the surface of the bridge, and the density of the grouting inside the prestressed holes must be tested.

[0003] At present, there are mainly core sampling, impact echo, infrared thermal imaging, ground penetrating radar, ultrasonic transmission and ultrasonic echo, X-ray and PZT sensor methods for detecting the density of grouting in ducts. Among them, the impact echo method is currently more widely used. The impact echo detection method belongs to the active source method. First, press the handheld probe against the surface to be tested on the side of the bridge, and then use a small steel hammer or a small steel ball to tap the concrete surface to cause instantaneous low-frequency stress waves. When the reflected waves reflected by the defects inside the concrete or the outer boundary of the concrete reach the concrete surface, they cause surface displacement and are collected by the receiving transducer. Then, the collected reflected wave waveform is analyzed by the dynamic signal analyzer to detect the density of grouting in ducts.

[0004] However, during the detection process, one person is required to operate the detection head to place the sensor close to the detection component and knock it multiple times with a small hammer, while another person needs to watch the display screen to observe the popper curve. This detection method is too time-consuming and labor-intensive. At the same time, the probe is prone to shaking when held in hand, thus affecting the detection results. Summary of the invention

[0005] The purpose of the present invention is to provide a device for detecting the density of grouting of prestressed ducts of bridges, so as to solve the technical problem in the prior art that during the detection process, one person needs to operate the detection head to press the sensor against the detection component and use a handheld hammer to knock it multiple times, while another person needs to watch the display screen to observe the Popper curve. This detection method is too time-consuming and labor-intensive, and the probe is prone to shaking when held in hand, thereby affecting the detection results.

[0006] To achieve the above-mentioned purpose, the present invention provides a device for detecting the density of grouting of prestressed channels of bridges, comprising a support platform, a support sleeve, a bracket, a fixed sleeve and a signal analyzer are arranged on the support platform, two electric push rods are arranged on the outer side of the support sleeve, a sliding rod is slidably arranged in the support sleeve, a limiting ring is arranged on the sliding rod, two first locking blocks and two stoppers are arranged on the outer side of the limiting ring, and the stoppers are aligned with the corresponding electric push rods, an impact hammer is arranged at one end of the sliding rod, mounting seats are arranged on both sides of the bracket, a locking assembly is arranged on the mounting seat, a plurality of first telescopic rods are arranged on the outer side of the bracket, a detection probe is arranged at the output end of the first telescopic rod, and the detection probe is connected to the signal analyzer through a wire, a first spring is arranged in the fixed sleeve, and the sliding rod extends into the fixed sleeve and abuts against one end of the first spring, and the two first locking blocks respectively abut against the corresponding locking assemblies.

[0007] Among them, the support sleeve is located at one end of the support platform, the bracket is located in the middle of the support platform, the fixing sleeve is located in the middle of the support platform and is also located on one side of the bracket, and the signal analyzer is located at the other end of the support platform.

[0008] In which, the locking assembly includes a second locking block, a second spring and a second telescopic rod, the first locking block and the second locking block both have a guide surface, the inner side of the mounting seat is provided with a locking groove, the second locking block is fixedly connected to the second spring and is located at one end of the second spring, the second locking block is also slidably connected to the mounting seat and is located in the locking groove, and the two first locking blocks are respectively abutted against the corresponding second locking blocks, the second spring is fixedly connected to the second telescopic rod and is located at the output end of the second telescopic rod and is also located in the locking groove, the second telescopic rod is fixedly connected to the mounting seat and is located on the other side of the mounting seat, and the output end of the second telescopic rod extends into the locking groove.

[0009] Among them, the device for detecting the density of grouting of prestressed ducts of bridges also includes a plurality of L-shaped rods and a lifting mechanism, a universal wheel is arranged below the L-shaped rod, the plurality of L-shaped rods are respectively fixedly connected to the support platform and are located on the outside of the support platform, and the lifting mechanism is arranged below the support platform.

[0010] Wherein, the lifting mechanism includes a base plate and two lifting hydraulic cylinders, the base plate is arranged at the output ends of the two lifting hydraulic cylinders, and the two lifting hydraulic cylinders are respectively fixedly connected to the support platform and are located below the support platform.

[0011] Wherein, the lifting mechanism further includes a plurality of directional moving wheels, and the plurality of directional moving wheels are respectively fixedly connected to the bottom plate and are located below the bottom plate.

[0012] Wherein, a bearing plate is arranged between the bottom plate and the lifting hydraulic cylinder, a plurality of reinforcement rods are arranged on the bearing plate, and the plurality of reinforcement rods are respectively fixedly connected to the lifting hydraulic cylinder and are located on the output shaft of the lifting hydraulic cylinder.

[0013] A device for detecting the density of grouting of prestressed channels of bridges according to the present invention comprises a support platform, on which a support sleeve, a bracket, a fixed sleeve and a signal analyzer are arranged, two electric push rods are arranged on the outer side of the support sleeve, a sliding rod is slidably arranged in the support sleeve, a limiting ring is arranged on the sliding rod, two first locking blocks and two stoppers are arranged on the outer side of the limiting ring, an impact hammer is arranged at one end of the sliding rod, mounting seats are arranged on both sides of the bracket, a locking assembly is arranged on the mounting seat, a plurality of first telescopic rods are arranged on the outer side of the bracket, a detection probe is arranged at the output end of the first telescopic rod, a first spring is arranged in the fixed sleeve, and the electric push rod is used to push the sliding rod into the fixed sleeve, and then self-locking is achieved under the action of the stopper and the locking assembly, while the detection probe is The detection probe transmits the signal to the signal analyzer through the wire, so that the detection data can be collected and analyzed in real time without manual observation of the pop curve on the display screen. The signal analyzer can automatically process and analyze the data, thereby reducing the need for manual intervention and judgment, and improving the detection efficiency and accuracy. In this way, the problem that one person needs to operate the detection head to make the sensor close to the detection component and hold a small hammer to knock it several times during the detection process, while the other person needs to watch the display screen to observe the pop curve, and this detection method is too time-consuming and labor-intensive, and the probe is prone to shaking when held in the hand, thereby affecting the technical problem of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0015] Figure 1 It is a front view of the first embodiment of the present invention.

[0016] Figure 2 The present invention Figure 1 Section view along line AA.

[0017] Figure 3The present invention Figure 2 A partial enlarged view of point B in the middle.

[0018] Figure 4 The present invention Figure 2 Sectional view along the CC line.

[0019] Figure 5 It is a three-dimensional stereogram of the second embodiment of the present invention.

[0020] Figure 6 It is a three-dimensional stereogram of the third embodiment of the present invention.

[0021] 101-support table, 102-support sleeve, 103-bracket, 104-fixing sleeve, 105-signal analyzer, 106-electric push rod, 107-sliding rod, 108-limiting ring, 109-first locking block, 110-stop block, 111-impact hammer, 112-mounting seat, 113-first telescopic rod, 114-detection probe, 115-second locking block, 116-second spring, 117-second telescopic rod, 11 8-guide surface, 119-locking groove, 120-first spring, 201-L-shaped rod, 202-universal wheel, 203-bottom plate, 204-lifting hydraulic cylinder, 205-directional moving wheel, 206-bearing plate, 207-reinforcement rod, 301-load-bearing mounting frame, 302-lifting ring, 303-load-bearing block, 304-connecting rod, 305-first push rod, 306-second push rod, 307-positioning rod, 308-positioning cylinder. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0023] First embodiment:

[0024] See also Figure 1 to Figure 4 ,in Figure 1 is a front view of a first embodiment of the present invention, Figure 2 The present invention Figure 1 The cross-sectional view along the AA line. Figure 3 The present invention Figure 2 A partial enlarged view of point B in the middle. Figure 4 The present invention Figure 2 Sectional view along the CC line.

[0025] The present invention provides a device for detecting the density of grouting of prestressed ducts of bridges, comprising a support platform 101, on which a support sleeve 102, a bracket 103, a fixing sleeve 104 and a signal analyzer 105 are arranged, two electric push rods 106 are arranged on the outer side of the support sleeve 102, a sliding rod 107 is slidably arranged in the support sleeve 102, a limiting ring 108 is arranged on the sliding rod 107, two first locking blocks 109 and two stoppers 110 are arranged on the outer side of the limiting ring 108, and the stoppers 110 are aligned with the corresponding electric push rods 106, an impact hammer 111 is arranged at one end of the sliding rod 107, and both sides of the bracket 103 are arranged There is a mounting seat 112, and a locking assembly is arranged on the mounting seat 112. A plurality of first telescopic rods 113 are arranged on the outer side of the bracket 103. A detection probe 114 is arranged at the output end of the first telescopic rod 113, and the detection probe 114 is connected to the signal analyzer 105 through a wire. A first spring 120 is arranged in the fixing sleeve 104, and the sliding rod 107 extends into the fixing sleeve 104 and abuts against one end of the first spring 120. Two first locking blocks 109 respectively abut against the corresponding locking assemblies. The signal analyzer 105 of this design is a prior art, so its specific structure and working principle are not described in detail here. By integrating the support platform 101, the support sleeve 102, the bracket 103, the fixing sleeve 104 and the signal analyzer 105 and other components, a systematic and automated detection device is formed, which can efficiently and accurately detect the density of the grouting of the prestressed duct of the bridge. The sliding rod 107 is pushed into the fixing sleeve 104 by the electric push rod 106, and then self-locking is achieved under the action of the stopper 110 and the locking component, and the detection probe 114 is fitted with the detected part. Finally, by controlling the locking component, the impact hammer 111 and the sliding rod 107 are instantly moved toward the detected part under the action of the first spring 120. Knocking, at this time, the detection probe 114 transmits the signal to the signal analyzer 105 through the wire, so that the detection data can be collected and analyzed in real time, without manual observation of the pop curve on the display screen, and the signal analyzer 105 can automatically process and analyze the data, thereby reducing the need for manual intervention and judgment, and improving detection efficiency and accuracy. In this way, it is effectively solved that during the detection process, one person needs to operate the detection head to press the sensor against the detection component and hold a small hammer to knock it several times, while the other person needs to watch the display screen to observe the pop curve. This detection method is too time-consuming and labor-intensive, and the probe is prone to shaking when held in the hand, thereby affecting the technical problem of the detection result.

[0026] Among them, the support sleeve 102 is located at one end of the support platform 101, the bracket 103 is located in the middle of the support platform 101, the fixing sleeve 104 is located in the middle of the support platform 101 and is also located on one side of the bracket 103, and the signal analyzer 105 is located at the other end of the support platform 101.

[0027] Secondly, the locking assembly includes a second locking block 115, a second spring 116 and a second telescopic rod 117, the first locking block 109 and the second locking block 115 both have a guide surface 118, the inner side of the mounting seat 112 has a locking groove 119, the second locking block 115 is fixedly connected to the second spring 116 and is located at one end of the second spring 116, the second locking block 115 is also slidably connected to the mounting seat 112 and is located in the locking groove 119, and the two first locking blocks 109 are respectively abutted against the corresponding second locking blocks 115, the second spring 116 is fixedly connected to the second telescopic rod 117 and is located at the output end of the second telescopic rod 117 and is also located in the locking groove 119, the second telescopic rod 117 is fixedly connected to the mounting seat 112 and is located on the other side of the mounting seat 112, and the second The output end of the telescopic rod 117 extends into the locking groove 119. By controlling the second telescopic rod 117, the output end of the second telescopic rod 117 is retracted, and the second locking block 115 is pulled back together under the action of the second spring 116. At this time, the second locking block 115 is separated from the first locking block 109, thereby releasing the first locking block 109, and the pressure of the first spring 120 is instantly released and pushes the sliding rod 107, thereby achieving the knocking of the impact hammer 111. The role of the guide surface 118 is reflected in the time when the sliding rod 107 is reset. When the two guide surfaces 118 conflict with each other, the second locking block 115 is retracted into the locking groove 119 under the action of the second spring 116, so that the first locking block 109 moves to the back of the second locking block 115, and then self-locking is achieved.

[0028] When using a device for detecting the density of grouting of prestressed channels of bridges according to the present embodiment, the device is moved to the area to be detected, and then the first telescopic rod 113 is started, and the detection probe 114 at its output end gradually approaches the channel wall to be detected. The first telescopic rod 113 can automatically adjust the position of the probe to ensure that it is tightly fitted to the channel wall to avoid the shaking problem that may occur when holding the probe. Subsequently, the two electric push rods 106 are started, so that the output ends of the electric push rods 106 push the two blocking blocks 110, and the sliding rod 107 moves into the fixed sleeve 104 and compresses the first spring 120. The two first locking blocks 109 are self-locked with the locking assembly under the action of the guide surface 118, and then the second telescopic rod 117 is controlled to move back, and the second locking block 115 moves into the locking groove 119. The first spring 120 is released instantly and pushes the sliding rod 107. The impact hammer 111 knocks the detected part under the action of the sliding rod 107. The vibration signal generated by the knocking is transmitted to the detection probe 114 through the channel wall. The detection probe 114 converts these vibration signals into electrical signals and transmits them to the signal analyzer 105 through a wire. The signal analyzer 105 receives and processes the electrical signals from the detection probe 114, generates a pop curve or other related data analysis charts, and judges whether the grouting density of the channel meets the requirements according to the characteristics of the pop curve or the data analysis results. For example, information such as the amplitude, frequency and phase of the waveform can reflect the uniformity, density and presence of voids or defects of the slurry in the channel.

[0029] Second embodiment:

[0030] Based on the first embodiment, please refer to Figure 5 ,in Figure 5 It is a three-dimensional stereogram of the second embodiment of the present invention.

[0031] The present invention provides a device for detecting the density of grouting of prestressed channels of bridges, which also includes a plurality of L-shaped rods 201 and a lifting mechanism. Universal wheels 202 are arranged below the L-shaped rods 201. The plurality of L-shaped rods 201 are respectively fixedly connected to the support platform 101 and are located on the outside of the support platform 101. The lifting mechanism is arranged below the support platform 101. The device can be easily moved through the universal wheels 202, thereby improving convenience.

[0032] Among them, the lifting mechanism includes a base plate 203 and two lifting hydraulic cylinders 204. The base plate 203 is arranged at the output end of the two lifting hydraulic cylinders 204. The two lifting hydraulic cylinders 204 are respectively fixedly connected to the support platform 101 and are located below the support platform 101. The lifting hydraulic cylinders 204 provide a stable lifting power for the base plate 203, so that the height of the entire device can be easily adjusted to adapt to detection components of different heights.

[0033] Secondly, the lifting mechanism also includes a plurality of directional moving wheels 205, which are respectively fixedly connected to the base plate 203 and are located below the base plate 203. The directional moving wheels 205 enable the device to be conveniently installed and moved in the specified direction, thereby improving the detection efficiency. This design not only improves the mobility of the device, but also ensures the stability and accuracy of the device during the detection process.

[0034] At the same time, a bearing plate 206 is arranged between the base plate 203 and the lifting hydraulic cylinder 204, and a plurality of reinforcement rods 207 are arranged on the bearing plate 206. The plurality of reinforcement rods 207 are respectively fixedly connected to the lifting hydraulic cylinder 204 and are located on the output shaft of the lifting hydraulic cylinder 204. The bearing plate 206 and the reinforcement rods 207 cooperate with each other to enhance the structural strength of the lifting mechanism and ensure the stability and safety of the lifting process.

[0035] When using a device for detecting the density of grouting of prestressed bridge channels according to the present embodiment, the detection device is placed near the prestressed bridge channel to be detected, ensuring that the support platform 101 is stable and in the correct direction, and then the bottom plate 203 is pushed by the lifting hydraulic cylinder 204 to adjust the height of the support platform 101 to a suitable position to accommodate different detected parts, so that the conveying detection probe 114 can be accurately aligned with the channel position to be detected, and the directional moving wheel 205 is used for horizontal movement of the device, so as to facilitate movement to any detected part in one direction.

[0036] Third embodiment:

[0037] Based on the second embodiment, please refer to Figure 6 ,in Figure 6 It is a three-dimensional stereogram of the third embodiment of the present invention.

[0038] The present invention provides a device for detecting the density of grouting of prestressed ducts of bridges, which also includes a pushing component, a plurality of positioning components, two load-bearing mounting frames 301 and a lifting ring 302, wherein a plurality of load-bearing blocks 303 are slidably arranged on the load-bearing mounting frame 301, a plurality of connecting rods 304 are arranged on the outer side of the lifting ring 302, the pushing component is arranged on the outer side of the supporting platform 101, a plurality of the positioning components are arranged between the supporting platform 101 and the bottom plate 203, the two load-bearing mounting frames 301 are fixedly connected to the bottom plate 203, and are located on the bottom plate 203, and are also located between the two lifting hydraulic cylinders 204, the supporting The lifting ring 302 is fixedly connected to the support sleeve 102 and is sleeved on the support sleeve 102, and the multiple connecting rods 304 are respectively fixedly connected to the corresponding first telescopic rods 113 and are located on the outside of the first telescopic rod 113. The load-bearing mounting frame 301 can facilitate the placement of the weight block 303, and the weight block 303 can facilitate the increase of the overall weight of the base plate 203, thereby avoiding the displacement of the entire device when the impact hammer 111 is hammering. The setting of the lifting ring 302 and the multiple connecting rods 304 can facilitate the improvement of the stability when the multiple first telescopic rods 113 are fixed.

[0039] Among them, the pushing assembly includes a first push rod 305 and a second push rod 306. The first push rod 305 is fixedly connected to the support platform 101 and is located on the outside of the support platform 101. The second push rod 306 is fixedly connected to the support platform 101 and is located on the outside of the support platform 101. The first push rod 305 is also located on one side of the second push rod 306. The first push rod 305 can be used to facilitate pushing the device as a whole, and the second push rod 306 is used to push it slightly when it needs to be close to the detected part.

[0040] Secondly, the positioning assembly includes a positioning rod 307 and a positioning cylinder 308. The positioning rod 307 is fixedly connected to the support platform 101 and is located at the bottom corner of the support platform 101. The positioning rod 307 is also slidably connected to the positioning cylinder 308 and is located inside the positioning cylinder 308. The positioning cylinder 308 is fixedly connected to the base plate 203 and is located at the top corner of the base plate 203. The arrangement of the positioning rod 307 and the positioning cylinder 308 can facilitate the improvement of the stability between the support platform 101 and the base plate 203, thereby avoiding shaking.

[0041] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A device for detecting the density of grouting in prestressed ducts of bridges, characterized in that: It includes a support platform, on which a support sleeve, a bracket, a fixed sleeve and a signal analyzer are arranged, two electric push rods are arranged on the outer side of the support sleeve, a sliding rod is slidably arranged in the support sleeve, a limiting ring is arranged on the sliding rod, two first locking blocks and two stop blocks are arranged on the outer side of the limiting ring, and the stop blocks are aligned with the corresponding electric push rods, an impact hammer is arranged at one end of the sliding rod, mounting seats are arranged on both sides of the bracket, a locking assembly is arranged on the mounting seat, a plurality of first telescopic rods are arranged on the outer side of the bracket, a detection probe is arranged at the output end of the first telescopic rod, and the detection probe is connected to the signal analyzer through a wire, a first spring is arranged in the fixed sleeve, and the sliding rod extends into the fixed sleeve and abuts against one end of the first spring, and the two first locking blocks respectively abut against the corresponding locking assemblies.

2. The device for detecting the density of grouting of prestressed ducts in bridges according to claim 1, characterized in that: The support sleeve is located at one end of the support platform, the bracket is located in the middle of the support platform, the fixing sleeve is located in the middle of the support platform and is also located on one side of the bracket, and the signal analyzer is located at the other end of the support platform.

3. The device for detecting the density of grouting of prestressed ducts in bridges according to claim 2, characterized in that: The locking assembly includes a second locking block, a second spring and a second telescopic rod, the first locking block and the second locking block both have a guide surface, the inner side of the mounting seat is provided with a locking groove, the second locking block is fixedly connected to the second spring and is located at one end of the second spring, the second locking block is also slidably connected to the mounting seat and is located in the locking groove, and the two first locking blocks are respectively abutted against the corresponding second locking blocks, the second spring is fixedly connected to the second telescopic rod and is located at the output end of the second telescopic rod and is also located in the locking groove, the second telescopic rod is fixedly connected to the mounting seat and is located on the other side of the mounting seat, and the output end of the second telescopic rod extends into the locking groove.

4. The device for detecting the density of grouting of prestressed ducts in bridges according to claim 3, characterized in that: The device for detecting the density of grouting of prestressed ducts in bridges also includes a plurality of L-shaped rods and a lifting mechanism. Universal wheels are arranged below the L-shaped rods. The plurality of L-shaped rods are respectively fixedly connected to the support platform and are located on the outside of the support platform. The lifting mechanism is arranged below the support platform.

5. The device for detecting the density of grouting of prestressed ducts in bridges according to claim 4, characterized in that: The lifting mechanism includes a base plate and two lifting hydraulic cylinders. The base plate is arranged at the output ends of the two lifting hydraulic cylinders. The two lifting hydraulic cylinders are respectively fixedly connected to the support platform and are located below the support platform.

6. The device for detecting the density of grouting of prestressed ducts in bridges according to claim 5, characterized in that: The lifting mechanism further comprises a plurality of directional moving wheels, which are respectively fixedly connected to the bottom plate and are located below the bottom plate.

7. The device for detecting the density of grouting of prestressed ducts in bridges according to claim 6, characterized in that: A bearing plate is arranged between the bottom plate and the lifting hydraulic cylinder, a plurality of reinforcing rods are arranged on the bearing plate, and the plurality of reinforcing rods are respectively fixedly connected to the lifting hydraulic cylinder and are located on the output shaft of the lifting hydraulic cylinder.

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