Intelligent detection device and method for grouting density of prestressed pipes in bridges

Abstract

The present invention discloses an intelligent detection device and method for the grouting density of a prestressed bridge pipe, and the present invention relates to the technical field of bridge construction. The intelligent detection device and method for the grouting density of a prestressed bridge pipe, through the setting of the detection component, when it is installed to the corresponding exhaust pipe and the ends of the slurry inlet and outlet, through a plurality of flow meters set inside, it can be compared with the flow value preset in the control panel. When the values ​​of the flow meters in the corresponding detection components tend to be equal, or the difference between them is within the preset range, or the average value measured by the flow meter in the same detection component is the flow value calculated by the preset density value, it means that the slurry can be continuously and evenly discharged from the exhaust pipe and the slurry outlet. At this time, the slurry outlet and the exhaust pipe can be sealed and the grouting density can be calculated by the formula, so that the obtained flow value can be more accurate, and the accuracy of measuring the grouting density is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to an intelligent detection device and method for the grouting density of a prestressed pipe of a bridge. Background Art

[0002] Prestressed reinforced concrete structures are characterized by high strength, high rigidity, good stability and excellent durability. In bridge projects, the prestressed tendons of prestressed reinforced concrete beams (after the steel strands are tensioned and grouted) bear about 80% of the load during bridge operation. In order to ensure the structural safety of prestressed reinforced concrete structures and prevent the corrosion of harmful substances in the prestressed tendons during use, which may cause the steel strands to rust, break or break, resulting in partial or complete loss of prestress and early damage to prestressed reinforced concrete, affecting the strength, rigidity, stability and durability of the bridge structure. In severe cases, it may cause the rupture and collapse of the bridge beams and major safety accidents such as vehicle damage and loss of life. Generally, the design and construction drawings and related quality acceptance specifications regard the pipe grouting density as the main control project and the key process and main quality control point in construction management. It is also an important source of safety hazards in bridge operation.

[0003] Existing methods for testing the density of prestressed pipe grouting usually include core sampling, impact echo, and detection radar or flow meter. When the grouting density of prestressed pipe is tested by flow meter, the flow meter needs to be installed at the slurry inlet, slurry outlet and exhaust port of the prestressed pipe to detect the flow values ​​during grouting. This will cause a large error in flow detection and make it difficult to seal the slurry outlet and exhaust port in time, resulting in delayed grouting and excessive overflow and waste of slurry when the density value is too small. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an intelligent detection device and method for the grouting density of prestressed pipes in bridges, which solves the problem of excessively large error values ​​during detection and inability to perform sealing operations in a timely manner.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an intelligent detection device for the grouting density of a prestressed pipe of a bridge, comprising a prestressed pipe and a control panel, wherein a plurality of steel strands are arranged inside the prestressed pipe, an exhaust pipe is arranged at the end of the prestressed original pipe, and detection components are arranged at the end of the exhaust pipe and the slurry inlet and outlet of the prestressed pipe, and wires are arranged between the control panel and the corresponding detection components, and are electrically connected through the wires, the detection component includes an outer sealing frame, a positioning component is arranged on the outer side of the outer sealing frame, and is fixedly connected to the exhaust pipe and the ends of the slurry inlet and the slurry outlet through the positioning component, a positioning ring is fixedly installed inside the outer sealing frame, an arc groove is opened inside the positioning ring, and an inner ring frame is rotatably installed through the opening of the arc groove, a plurality of flow meters are fixedly installed inside the inner ring frame, and a sealing component is arranged on the outer side of the outer sealing frame.

[0006] Preferably, the sealing assembly includes a connecting plate, which is fixedly mounted on the side of the corresponding outer sealing frame, a hydraulic cylinder is fixedly mounted on the inner end of the connecting plate, a limiting frame is fixedly mounted inside the inner ring frame, a sealing frame is slidably mounted on the end of the outer sealing frame through the cooperation of the inner ring frame, and the middle part of the top surface of the sealing frame is fixedly connected to the end of the hydraulic cylinder.

[0007] Preferably, a limiting column is fixedly installed in the middle of the inner side of the sealing frame, the limiting column is slidably installed in the inner center position of the limiting frame, and the sealing frame is slidably installed on the top surface of the outer sealing frame through the cooperation of the limiting column and the limiting frame.

[0008] Preferably, there are several connecting ring grooves, and the outer walls of the connecting ring grooves are each provided with several through holes, a sealing convex ring is fixedly installed at the bottom of the sealing frame, and the installation position of the sealing convex ring corresponds to the opening position of the connecting ring groove.

[0009] Preferably, positioning grooves are provided around the inside of the positioning ring, and the positioning ring is fixedly mounted on the inner side of the corresponding outer sealing frame through the cooperation of a plurality of positioning grooves and bolts.

[0010] Preferably, arc blocks are fixedly mounted on the outer sides of several inner ring frames.

[0011] Preferably, a plurality of the inner ring frames are respectively rotatably installed inside the corresponding positioning ring through the cooperation of the outer arc-shaped blocks and the arc-shaped grooves.

[0012] Preferably, the positioning assembly comprises a connecting end, the connecting end is fixedly mounted on the end of the corresponding outer sealing frame, a sealing ring is fixedly mounted on the inner side of the connecting end, and wing-shaped bolts are arranged around the inner side.

[0013] Preferably, a plurality of the outer sealing frames are fixedly mounted on the ends of the corresponding exhaust pipes and the slurry inlet and outlet through the cooperation of corresponding connecting ends and wing-shaped bolts.

[0014] An intelligent detection method for the grouting density of a bridge prestressed pipe comprises the following steps:

[0015] S1. First, install the detection assembly to the end of the exhaust pipe, and the slurry inlet and outlet of the prestressed pipe respectively. During installation, debug the detection assembly through the control panel to ensure that the flow meter in the detection assembly can operate normally;

[0016] S2, mixing the prepared slurry to ensure uniformity inside the slurry, and then pressing the slurry into the prestressed pipe through the slurry inlet of the prestressed pipe, while observing the values ​​of the flow meters in each detection component through the control panel;

[0017] S3. When the values ​​of the flow meters in the corresponding detection components tend to be equal, or the difference between them is within the preset range, or the average value measured by the flow meter in the same detection component is equal to the flow value calculated by the preset density value, it means that the slurry can be discharged continuously and evenly from the exhaust pipe and the slurry outlet, and then the corresponding hydraulic cylinder is controlled to operate through the control panel to push the corresponding sealing frame inward through the limit column until the sealing convex ring fixed on its inner side is inserted into the corresponding connecting ring groove, and the exhaust pipe or slurry outlet where the flow meter values ​​tend to be equal is closed, and then the grouting density in the prestressed pipe is calculated by the formula ρ=(V4-V3-V2) / V1*100%. If the grouting density in the prestressed pipe is less than the preset value, the grouting pressure value is increased until the index value is reached.

[0018] Beneficial Effects

[0019] The present invention provides an intelligent detection device and method for the density of grouting of prestressed pipes in bridges. Compared with the prior art, it has the following beneficial effects:

[0020] (1) The intelligent detection device and method for the grouting density of the prestressed pipe of the bridge, through the setting of the detection component, when it is installed at the end of the corresponding exhaust pipe and the slurry inlet and outlet, it can be compared with the preset flow value in the control panel through a plurality of flow meters set inside. When the values ​​of the flow meters in the corresponding detection components tend to be equal, or the difference between them is within the preset range, or the average value measured by the flow meters in the same detection component is the same as the flow value calculated by the preset density value, it means that the slurry can be continuously and evenly discharged from the exhaust pipe and the slurry outlet. At this time, the slurry outlet and the exhaust pipe can be sealed and the grouting density can be calculated by the formula, so that the obtained flow value can be more accurate, thereby improving the accuracy of measuring the grouting density and ensuring the subsequent construction effect.

[0021] (2) The intelligent detection device and method for the grouting density of the prestressed pipe of the bridge, through the setting of the sealing component, when the flow value measured by the flow meter in each detection component is transmitted to the control panel, it can be operated through the corresponding hydraulic cylinder at the same time, so that it pushes the corresponding sealing frame to be pressed inward through the limit column until the sealing convex ring fixed on the inner side thereof is inserted into the corresponding connecting ring groove, and the exhaust pipe or slurry outlet whose flow meter value tends to be equal is closed, thereby ensuring the subsequent slurry pressure injection and avoiding excessive slurry overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Schematic diagram of the cross-section structure;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the outer sealing frame of the present invention;

[0025] Figure 4 This is a schematic diagram of the enlarged structure of point A of the present invention;

[0026] Figure 5 It is a schematic diagram of the cross-sectional structure of the positioning ring of the present invention.

[0027] In the figure: 1. prestressed pipe; 101. steel strand; 2. exhaust pipe; 3. outer sealing frame; 301. connecting end; 302. sealing ring; 303. wing bolt; 304. connecting ring groove; 3041. through hole; 4. control panel; 401. wire; 5. connecting plate; 501. hydraulic cylinder; 6. sealing frame; 601. limiting column; 602. sealing convex ring; 7. positioning ring; 701. positioning groove; 702. arc groove; 8. inner ring frame; 801. limiting frame; 802. arc block; 9. flow meter. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-5 , the present invention provides two technical solutions: Embodiment 1:

[0030] An intelligent detection device for the grouting density of a prestressed pipe of a bridge comprises a prestressed pipe 1 and a control panel 4, wherein a plurality of steel strands 101 are arranged inside the prestressed pipe 1, an exhaust pipe 2 is arranged at the end of the prestressed original pipe 1, and detection components are arranged at the end of the exhaust pipe 2 and the slurry inlet and outlet of the prestressed pipe 1, and a wire 401 is arranged between the control panel 4 and the corresponding detection component, and is electrically connected through the wire 401; the detection component comprises an outer sealing frame 3, a positioning component is arranged on the outer side of the outer sealing frame 3, and is fixedly connected to the exhaust pipe 2 and the ends of the slurry inlet and outlet through the positioning component, a positioning ring 7 is fixedly installed inside the outer sealing frame 3, an arc groove 702 is opened inside the positioning ring 7, and an inner ring frame 8 is rotatably installed through the opening of the arc groove 702, a plurality of flow meters 9 are fixedly installed inside the inner ring frame 8, and a sealing component is arranged on the outer side of the outer sealing frame 3.

[0031] Embodiment 2:

[0032] An intelligent detection device for the grouting density of a prestressed pipe of a bridge comprises a prestressed pipe 1 and a control panel 4, wherein a plurality of steel strands 101 are arranged inside the prestressed pipe 1, an exhaust pipe 2 is arranged at the end of the prestressed original pipe 1, and detection components are arranged at the end of the exhaust pipe 2 and the slurry inlet and outlet of the prestressed pipe 1, and a wire 401 is arranged between the control panel 4 and the corresponding detection component, and the wire 401 is electrically connected; the detection component comprises an outer sealing frame 3, a positioning component is arranged on the outer side of the outer sealing frame 3, and the positioning component is fixedly connected to the exhaust pipe 2 and the ends of the slurry inlet and outlet through the positioning component, a positioning ring 7 is fixedly installed inside the outer sealing frame 3, an arc groove 702 is opened inside the positioning ring 7, and the arc groove 702 is opened through the opening of the arc groove 702. An inner ring frame 8 is rotatably installed, and a plurality of flow meters 9 are fixedly installed inside the inner ring frame 8. A sealing assembly is arranged on the outer side of the outer sealing frame 3, and the sealing assembly includes a connecting plate 5, which is fixedly installed on the side of the corresponding outer sealing frame 3. A hydraulic cylinder 501 is fixedly installed on the inner end of the connecting plate 5. A limiting frame 801 is fixedly installed inside the inner ring frame 8. A sealing frame 6 is slidably installed on the end of the outer sealing frame 3 through the cooperation of the inner ring frame 8. The middle part of the top surface of the sealing frame 6 is fixedly connected to the end of the hydraulic cylinder 501. A limiting column 601 is fixedly installed on the inner middle part of the sealing frame 6. The limiting column 601 is slidably installed at the inner center position of the limiting frame 801. The sealing frame 6 is slidably installed on the top of the outer sealing frame 3 through the cooperation of the limiting column 601 and the limiting frame 801. The sealing frame 6 has a plurality of connecting ring grooves 304, and the outer walls of the connecting ring grooves 304 are provided with a plurality of through holes 3041. A sealing convex ring 602 is fixedly installed at the bottom of the sealing frame 6. The installation position of the sealing convex ring 602 corresponds to the opening position of the connecting ring groove 304. Positioning grooves 701 are provided around the inside of the positioning ring 7. The positioning ring 7 is fixedly installed on the inner side of the corresponding outer sealing frame 3 through the cooperation of the plurality of positioning grooves 701 and bolts. The outer sides of the plurality of inner ring frames 8 are fixedly installed with arc blocks 802. The plurality of inner ring frames 8 are rotatably installed in the corresponding positioning ring 7 through the cooperation of the outer arc blocks 802 and the arc grooves 702. The positioning assembly includes a connecting end 301, and the connecting end 301 is fixedly installed in the corresponding outer sealing frame 3. At the end of the frame 3, a sealing ring 302 is fixedly installed on the inner side of the connecting end 301, and wing-shaped bolts 303 are arranged around the inside. Several external sealing frames 3 are fixedly installed on the corresponding exhaust pipe 2 and the ends of the slurry inlet and outlet through the cooperation of the corresponding connecting ends 301 and the wing-shaped bolts 303. The grouting density calculation formula is ρ=(V4-V3-V2) / V1*100%, where ρ represents the grouting density, V1 represents the grouting amount of the prestressed pipe 1, that is, the volume, V2 represents the leakage amount of the slurry outlet, V3 represents the leakage amount of the exhaust pipe 2, and V4 represents the grouting amount of the slurry inlet. The control panel 4 is used to control the operation of the corresponding hydraulic cylinder 501 and monitor the flow meter 9 at the same time. Several flow meters 9 are all existing devices.

[0033] When in use, first install the detection components to the ends of the exhaust pipe 2, and the slurry inlet and outlet of the prestressed pipe 1 respectively. During installation, debug the detection components through the control panel 4 to ensure that the flow meter 9 in the detection component can operate normally; mix the prepared slurry to ensure uniformity inside, and then press the slurry into the prestressed pipe 1 through the slurry inlet of the prestressed pipe 1. While pressing, observe the values ​​of the flow meters 9 in each detection component through the control panel 4; when the values ​​of the flow meters 9 in the corresponding detection components tend to be equal, or the difference between them is within the preset range, or the average value measured by the flow meter 9 in the same detection component is equal to the preset value, When the flow value calculated by the flow meter 9 is obtained, it means that the slurry can be discharged continuously and evenly from the exhaust pipe 2 and the slurry outlet, and then the corresponding hydraulic cylinder 501 is controlled to operate through the control panel 4 to push the corresponding sealing frame 6 to be pressed inward through the limit column 601 until the sealing convex ring 602 fixedly installed on the inner side thereof is inserted into the corresponding connecting ring groove 304, and the exhaust pipe 2 or the slurry outlet whose value of the flow meter 9 tends to be equal is closed, and then the grouting density in the prestressed pipe 1 is calculated by the formula ρ=ρ=(V4-V3-V2) / V1*100%. If the grouting density in the prestressed pipe 1 is less than the preset value, the grouting pressure value is increased until the index value is reached.

[0034] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] 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.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent detection device for the grouting density of a bridge prestressed pipe, comprising a prestressed pipe (1) and a control panel (4), wherein a plurality of steel strands (101) are arranged inside the prestressed pipe (1), and an exhaust pipe (2) is arranged at the end of the prestressed pipe (1), characterized in that: The end of the exhaust pipe (2) and the slurry inlet and outlet of the prestressed pipe (1) are both provided with detection components, and a wire (401) is provided between the control panel (4) and the corresponding detection components, and they are electrically connected via the wire (401); The detection assembly comprises an outer sealing frame (3), a positioning assembly is arranged on the outer side of the outer sealing frame (3), and is fixedly connected to the exhaust pipe (2) and the ends of the slurry inlet and the slurry outlet through the positioning assembly, a positioning ring (7) is fixedly installed inside the outer sealing frame (3), an arc-shaped groove (702) is opened inside the positioning ring (7), and an inner ring frame (8) is rotatably installed through the opening of the arc-shaped groove (702), a plurality of flow meters (9) are fixedly installed inside the inner ring frame (8), and a sealing assembly is arranged on the outer side of the outer sealing frame (3); The sealing assembly comprises a connecting plate (5), the connecting plate (5) being fixedly mounted on the side of the corresponding outer sealing frame (3), a hydraulic cylinder (501) being fixedly mounted on the inner end of the connecting plate (5), a limiting frame (801) being fixedly mounted inside the inner ring frame (8), a sealing frame (6) being slidably mounted on the end of the outer sealing frame (3) through the cooperation of the inner ring frame (8), and a middle portion of the top surface of the sealing frame (6) being fixedly connected to the end of the hydraulic cylinder (501); A limiting column (601) is fixedly mounted on the inner middle part of the sealing frame (6), and the limiting column (601) is slidably mounted on the inner center position of the limiting frame (801). The sealing frame (6) is slidably mounted on the top surface of the outer sealing frame (3) through the cooperation between the limiting column (601) and the limiting frame (801). A plurality of connecting ring grooves (304) and a plurality of through holes (3041) are provided on the outer walls of the connecting ring grooves (304). A sealing convex ring (602) is fixedly mounted on the bottom of the sealing frame (6), and the installation position of the sealing convex ring (602) corresponds to the opening position of the connecting ring groove (304).

2. According to claim 1, the intelligent detection device for the grouting density of the prestressed pipe of the bridge is characterized by: The locating ring (7) is provided with locating grooves (701) all around its interior, and the locating ring (7) is fixedly mounted on the inner side of the corresponding outer sealing frame (3) through the cooperation of a plurality of locating grooves (701) and bolts.

3. The intelligent detection device for the grouting density of a bridge prestressed pipe according to claim 1 is characterized by: The outer sides of the plurality of inner ring frames (8) are all fixedly mounted with arc-shaped blocks (802).

4. The intelligent detection device for the grouting density of prestressed pipes of bridges according to claim 3 is characterized by: A plurality of the inner ring frames (8) are respectively rotatably mounted inside corresponding positioning rings (7) through the cooperation of the outer arc-shaped blocks (802) and the arc-shaped grooves (702).

5. According to claim 1, the intelligent detection device for the grouting density of the prestressed pipe of a bridge is characterized by: The positioning assembly comprises a connecting end (301), the connecting end (301) being fixedly mounted on the end of the corresponding outer sealing frame (3), a sealing ring (302) being fixedly mounted on the inner side of the connecting end (301), and wing-shaped bolts (303) are arranged around the inner side.

6. The intelligent detection device for the grouting density of prestressed pipes of bridges according to claim 5 is characterized by: The plurality of outer sealing frames (3) are respectively fixedly mounted on the ends of the corresponding exhaust pipes (2) and the pulp inlet and the pulp outlet through the cooperation of corresponding connecting ends (301) and wing-shaped bolts (303).

7. An intelligent detection method for the grouting density of a prestressed bridge pipe, using an intelligent detection device for the grouting density of a prestressed bridge pipe as claimed in claim 1, characterized in that: The intelligent detection method specifically includes the following: S1. First, the detection assembly is installed at the end of the exhaust pipe (2) and the slurry inlet and outlet of the prestressed pipe (1), respectively. During the installation, the detection assembly is debugged through the control panel (4) to ensure that the flow meter (9) in the detection assembly can operate normally; S2, mixing the prepared slurry to ensure uniformity inside the slurry, and then pressing the slurry into the prestressed pipe (1) through the slurry inlet of the prestressed pipe (1), and observing the values ​​of the flow meters (9) in each detection component through the control panel (4) while pressing the slurry into the prestressed pipe (1); S3. When the values ​​of the flowmeters (9) in the corresponding detection components tend to be equal, or the difference between them is within a preset range, it means that the slurry can be discharged continuously and evenly from the exhaust pipe (2) and the slurry outlet. Then, the corresponding hydraulic cylinder (501) is controlled to operate through the control panel (4) so ​​that it pushes the corresponding sealing frame (6) to press inward through the limit column (601) until the sealing convex ring (602) fixedly installed on the inner side thereof is inserted into the corresponding connecting ring groove (304), and the value of the flowmeter (9) tends to be equal. The exhaust pipe (2) or the grouting outlet of equal value is closed, and then the grouting density in the prestressed pipe (1) is calculated by the formula ρ=(V4-V3-V2) / V1*100%. If the grouting density in the prestressed pipe (1) is less than the preset value, the grouting pressure value is increased until the index value is reached, wherein ρ represents the grouting density, V1 represents the grouting amount of the prestressed pipe 1, that is, the volume, V2 represents the leakage amount of the grouting outlet, V3 represents the leakage amount of the exhaust pipe 2, and V4 represents the grouting amount of the grouting inlet.

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