An early warning device for bridge and culvert construction

Abstract

The present invention discloses an early warning device for bridge and culvert construction, including a cavity and a vibrating string sensor, wherein the cavity is ellipsoidal in shape as a whole, a pipe opening is connected to one side of the cavity, a vertical surface is arranged on the inner wall of the cavity on one side of the pipe opening, and the inner wall of the cavity is located on the opposite side of the vertical surface and the inner wall surface extending to the surroundings on the opposite side is an arc surface. The present invention arranges a cavity, an elastic film, a vibrating string sensor and an inner sleeve, and utilizes the mutual cooperation of the several, so that the vibrating string sensor and the cavity can be threadedly assembled and installed, and the cavity is used to receive sound waves and generate mixed reverberation, and then the sound wave path is concentrated and reflected onto the elastic film through the specific arc surface of the cavity, and the signal is transmitted from the steel string to the vibrating string sensor, and the interior of the slope can be monitored in real time at this time, and the structural combination can effectively provide timely early warning during the construction process to improve the safety level during construction.

Description

Technical Field

[0001] The present invention relates to the technical field of early warning equipment, and more specifically, to an early warning device for bridge and culvert construction. Background Art

[0002] Bridge and culvert is an engineering term, which is a general term for bridges and culverts, especially involving a culvert project built on a slope. In this construction project, early warning equipment is needed to detect the vibration of the bridge and culvert and the external soil environment, so as to provide real-time early warning of the surrounding environment in time, so as to detect the overall stability of the slope structure, achieve safe construction and use different types of construction equipment according to the actual situation of the construction site.

[0003] However, there are still some shortcomings in its actual use. For example, the current early warning equipment can generally only monitor whether there are fluctuations and slight vibrations in the main structure of the culvert itself when issuing early warnings for construction in a slope environment (because the main structure of the culvert is constructed step by step and fixed by splicing, when cracks or local dislocations occur between the structures due to the squeezing and compression of the slope, the stability of the main structure will decrease and cause slight vibrations, leading to serious problems such as subsequent collapse). When the slope is affected by the construction equipment or the degree of excavation during construction, causing the stability of its internal structure to be affected, and reaching the critical value of collapse, it is impossible to monitor and provide feedback in the first time, resulting in the current early warning equipment being unable to effectively give early warnings during the construction process and take timely response measures, resulting in considerable safety hazards in the construction of culverts in a slope environment, and the timeliness of the early warning of the overall stability of the slope during its construction needs to be improved. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides an early warning device for bridge and culvert construction. By setting a cavity, an elastic film, a vibrating string sensor and an inner sleeve, the vibrating string sensor and the cavity can be threadedly assembled and installed, and the cavity is used to receive sound waves. When the sound wave propagates in a solid medium and encounters a cavity (i.e., a cavity), reverberation will occur, and the sound wave path will be concentrated and reflected onto the elastic film through a specific arc surface of the cavity, and a sound focusing point will be formed at its center, thereby improving the elastic film's sensitivity to sound waves, and transmitting the signal to the vibrating string sensor so that the excavation path and range can be changed in time. This structural combination can effectively provide timely early warning during the construction process, and take timely countermeasures to improve the safety level during construction, further improve its early warning sensitivity and working effect, and solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an early warning device for bridge and culvert construction, comprising a cavity and a vibrating-wire sensor, the cavity being ellipsoidal in shape as a whole, one side of the cavity being connected to a pipe opening, the inner wall of the cavity being located on one side of the pipe opening being provided with a vertical surface, one side of the vertical surface being provided with an embedded circular hole adapted to the pipe opening, the inner wall surface of the pipe opening being provided with an internal thread, the inner wall of the cavity being located on the opposite side of the vertical surface and the inner wall surface of the opposite side extending to the surrounding areas are both arc-shaped surfaces;

[0006] The internal thread of the pipe mouth is connected with an inner sleeve, the outer surface of the inner sleeve is provided with an external thread matching the internal thread, the end of the inner sleeve is fixedly sleeved with a sealing bottom plate, the middle of the sealing bottom plate is provided with a threaded notch, the end of the inner sleeve away from the sealing bottom plate is fixedly sleeved with a side baffle, the outer diameter of the inner sleeve is matched with the inner diameter of the pipe mouth, and the tail end of the sealing bottom plate is kept level with one side of the inner sleeve;

[0007] An annular baffle is fixedly installed on the inner wall of the pipe mouth, and the inner wall of the side baffle is gradually distributed in an involute shape toward one end of the annular baffle and finally forms an inclined surface structure, and the inclined surface structure is rounded and transitioned with the end of the inner side of the side baffle away from the annular baffle and is arranged to be seamlessly connected, and the inner side surface of the side baffle is maintained at the same horizontal plane as the inner side of the annular baffle, and an elastic film is fixedly attached to one end of the inner sleeve and located on one side of the side baffle, and the side baffle is fitted with one side of the elastic film, and a steel string is fixedly arranged at the center position of one side of the elastic film, and a vibrating string sensor is fixedly arranged on the other end of the steel string, and a fixing seat is fixedly sleeved on the other end of the vibrating string sensor , the upper and lower ends of the fixing seat are respectively provided with a mounting groove and a rotating notch, one end of the rotating notch is connected with a connecting hole, the inner rotating sleeve of the rotating notch is connected with a copper sleeve, one end of the copper sleeve is fixedly installed with a connecting rod, the inner part of the vibrating string sensor is electrically connected with a wire, the working form of the elastic film is arc-shaped, and the arc-shaped concave part points to one side of the cavity, and the elastic film is in a tensioned state as a whole, the rotating notch and the copper sleeve are in a transition fit, the connecting hole and the connecting rod are in a clearance fit, and the copper sleeve is in a semi-closed structure toward the tail end of the connecting rod, and the centers of the vibrating string sensor, the fixing seat, the copper sleeve and the connecting rod are all located on the same central axis;

[0008] A fixing column is fixedly installed at one end of the connecting rod, and the other end of the fixing column is fixedly connected to a limiting plate, and a threaded column is fixedly installed at the other end of the limiting plate, and the other end of the threaded column is fixedly connected to a handle, and the surface of the handle is inclined and has wear-resistant grooves. When the elastic film is in an arc shape as a whole, the limiting plate is driven by the rotation of the threaded column to move to one side of the sealing chassis and maintain a close contact with the inner wall of the sealing chassis. The threaded notch and the limiting plate are horizontally distributed, and the maximum spacing value between the limiting plate and the inner side of the sealing chassis is the same as the tension deformation of the elastic film;

[0009] One side of the wire passes through the interior of the sealed chassis and extends outward, and a circular through hole adapted to the wire is provided inside the sealed chassis, and the thickness of the elastic film and the distance between one side end of the inner sleeve and the annular baffle are adapted to each other;

[0010] After the sound wave moves from one side of the vertical surface of the inner wall of the cavity to the opposite side of the curved surface and is reflected, an acoustic focusing point is formed inside the pipe mouth, and the acoustic focusing point coincides with the round point of the elastic film.

[0011] In a preferred embodiment, the surfaces of the internal thread and the external thread are coated with a layer of lubricating grease. When the elastic film is in a working state, one side of the elastic film close to the side baffle plate is adhered to the surface of the inclined surface structure, and the other side of the elastic film is adhered to the inner side of the annular baffle plate.

[0012] In a preferred embodiment, the steel string is in a taut state.

[0013] In a preferred embodiment, the annular baffle and the side baffle are both annular in structure as a whole, and the cross section of the annular baffle is rectangular, and the elastic film is made of styrene-based high elastic material as a whole.

[0014] In a preferred embodiment, the distance between one side of the annular baffle and the inner end of the pipe opening is greater than the thickness of the annular baffle, and there is a gap between one side of the vertical plane and the annular baffle.

[0015] In a preferred embodiment, the length range of the external thread is greater than the length range of the internal thread, and the connection between the sealing chassis and the inner sleeve is sealed and fixed by a rubber ring.

[0016] Technical effects and advantages of the present invention:

[0017] The present invention provides a cavity, an elastic film, a vibrating-wire sensor and an inner sleeve, and utilizes the mutual cooperation of the plurality of them to threadably combine and install the vibrating-wire sensor with the cavity, and utilize the cavity to receive sound waves. When the sound waves propagate in a solid medium and encounter a cavity (i.e., the cavity), reverberation will occur, and the sound wave path will be concentrated and reflected onto the elastic film through a specific arc surface of the cavity, and a sound focusing point will be formed at the center thereof, thereby improving the elastic film's sensitivity to sound waves, and at the same time improving the concentration trend of sound waves, increasing the structure's receiving effect on sound waves, and transmitting the signal from the steel string to the vibrating-wire sensor, so that the sensor's peripheral early warning center can receive the signal fluctuation in real time. At this time, the internal structure of the slope can be monitored in real time, so as to timely change the excavation path and range. The structural combination can effectively provide timely early warning during the construction process, and take timely countermeasures, thereby ensuring the stability of the culvert during slope construction, and improving the safety level during construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of a half-section structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the local structure of the pipe mouth of the present invention;

[0021] Figure 4 It is a schematic diagram of the overall structure of the pipe mouth and the inner sleeve of the present invention;

[0022] Figure 5 It is a schematic diagram of the assembly structure of the nozzle and the inner sleeve of the present invention;

[0023] Figure 6 It is a schematic diagram of the side cross-sectional structure of the inner sleeve of the present invention;

[0024] Figure 7 It is a schematic diagram of the three-dimensional assembly structure of the vibrating-wire sensor and the fixing seat of the present invention;

[0025] Figure 8 It is a schematic diagram of the cross-sectional structure of the cavity of the present invention;

[0026] Fig. 9 A schematic diagram of the acoustic wave reflection direction path inside the cavity of the present invention and the acoustic focal point formed therein;

[0027] Fig.10 It is a schematic diagram of the cross-sectional structure of the pipe mouth and the inner sleeve of the present invention;

[0028] Fig.11 This is a schematic diagram of the structure of the elastic film of the present invention when it is pre-tightened;

[0029] Fig.12For the present invention Fig.10 A schematic diagram of the enlarged structure at point A;

[0030] Fig.13 It is a schematic diagram of the overall assembly structure of the present invention;

[0031] Fig.14 It is a schematic diagram of the partial structure of the mounting base and the copper sleeve of the present invention;

[0032] Fig.15 It is a schematic diagram of the cross-sectional expansion structure of the inner sleeve of the present invention;

[0033] Fig.16 It is a partial enlarged structural schematic diagram of the elastic film and the side baffle of the present invention;

[0034] Fig.17 It is a finite element analysis cloud diagram of the cavity of the present invention gradually receiving the focused state of the sound wave;

[0035] Fig.18 It is a finite element analysis cloud diagram of the sound wave gathering state of the cavity of the present invention at different sound speeds;

[0036] Fig.19 It is the sound pressure diagram of the sound focusing point inside the cavity of the present invention.

[0037] The accompanying drawings are marked as follows: 1. cavity; 2. pipe mouth; 3. vertical surface; 4. embedded circular hole; 5. internal thread; 7. annular baffle; 61. inner sleeve; 62. external thread; 63. sealing chassis; 64. threaded slot; 65. side baffle; 81. elastic film; 82. steel string; 83. vibrating string sensor; 84. fixing seat; 85. mounting groove; 86. rotating slot; 87. connecting hole; 88. copper sleeve; 89. connecting rod; 89A, electric wire; 91. fixing column; 92. limit plate; 93. threaded column; 94. handle; 95. wear-resistant pattern. DETAILED DESCRIPTION

[0038] 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.

[0039] like Figures 1 to 19The early warning device for bridge and culvert construction shown in the figure comprises a cavity 1 and a vibrating-wire sensor 83, wherein the cavity 1 is ellipsoidal in shape as a whole, and a pipe opening 2 is connected to one side of the cavity 1, and a vertical surface 3 is arranged on the inner wall of the cavity 1 on one side of the pipe opening 2, and an embedded circular hole 4 matching the pipe opening 2 is provided on one side of the vertical surface 3, and an inner wall surface of the pipe opening 2 is provided with an internal thread 5, and the inner wall of the cavity 1 is located on the opposite side of the vertical surface 3 and the inner wall surface extending to the surroundings on the opposite side are both arc-shaped surfaces, and the vertical surface 3 and the arc-shaped surface of the inner wall of the cavity 1 are used to effectively conduct incoming sound waves in a direction, so that an acoustic focusing point is formed inside the cavity 1 to concentrate the energy of the sound waves, so as to facilitate the subsequent effective monitoring of the sound waves;

[0040] The internal thread 5 of the pipe mouth 2 is connected with an inner sleeve 61, and the outer surface of the inner sleeve 61 is provided with an external thread 62 that matches the internal thread 5. The end of the inner sleeve 61 is fixedly sleeved with a sealing bottom plate 63, and the middle part of the sealing bottom plate 63 is provided with a threaded groove 64. The end of the inner sleeve 61 away from the sealing bottom plate 63 is fixedly sleeved with a side baffle 65, and the outer diameter of the inner sleeve 61 is matched with the inner diameter of the pipe mouth 2, and the tail end of the sealing bottom plate 63 is kept horizontal with one side of the inner sleeve 61. The inner wall of the side baffle 65 gradually forms an involute distribution toward one end of the annular baffle 7 and finally forms an inclined surface structure. The inclined surface structure and the end of the inner side of the side baffle 65 away from the annular baffle 7 are rounded and seamlessly connected. Through the design of the inclined surface structure, one side of the side baffle 65 can effectively fit the outer side of the elastic film 81 and adhere to it according to its shape, further ensuring the adhesion intimacy between the elastic film 81 and the side baffle 65.

[0041] An annular baffle 7 is fixedly installed on the inner wall of the pipe mouth 2, and the inner side surface of the side baffle 65 is maintained at the same horizontal plane as the inner side of the annular baffle 7. An elastic film 81 is fixedly attached to one end of the inner sleeve 61 and located on one side of the side baffle 65. The side baffle 65 fits with one side of the elastic film 81. A steel string 82 is fixedly provided at the center position of one side of the elastic film 81, and a vibrating string sensor 83 is fixedly provided at the other end of the steel string 82. A fixing seat 84 is fixedly sleeved on the other end of the vibrating string sensor 83. A mounting groove 85 and a rotating slot 86 are respectively provided at the upper and lower ends of the fixing seat 84. A connecting hole 87 is connected to one end of the rotating slot 86. A copper sleeve 88 is rotatably sleeved inside the rotating slot 86. By setting the above copper sleeve 88 and the rotating slot 86, the rotational friction between the copper sleeve 88 and the rotating slot 86 can be reduced to ensure its smoothness in rotation and lateral movement. The wear rate of each structure of the equipment is reduced, and the service life of each structure thereof is increased. A connecting rod 89 is fixedly installed at one end of the copper sleeve 88. The inside of the vibrating-wire sensor 83 is electrically connected with a wire 89A. The working form of the elastic film 81 is arc-shaped, and the concave part of the arc points to one side of the cavity 1, and the elastic film 81 is in a tensioned state as a whole. There is a transition fit between the rotating notch 86 and the copper sleeve 88, and there is a clearance fit between the connecting hole 87 and the connecting rod 89. The tail end of the copper sleeve 88 toward the connecting rod 89 is a semi-closed structure. The centers of the vibrating-wire sensor 83, the fixing seat 84, the copper sleeve 88 and the connecting rod 89 are all located on the same central axis. The arc-shaped working form of the elastic film 81 is set so that the whole is always in a tensioned state. When receiving the conducted vibration of the sound wave, it can effectively drive itself to vibrate, improve the sensitivity to the sound wave, and reduce the telescopic range required for itself in vibration.

[0042] A fixing column 91 is fixedly installed at one end of the connecting rod 89, and the other end of the fixing column 91 is fixedly connected to a limiting plate 92, and a threaded column 93 is fixedly installed at the other end of the limiting plate 92, and the other end of the threaded column 93 is fixedly connected to a handle 94, and the surface of the handle 94 is inclined and provided with wear-resistant grooves 95. The wear-resistant grooves 95 provided on the surface of the handle 94 facilitate the operator to grasp the handle 94, thereby further improving its controllability. When the elastic film 81 is in an arc shape as a whole, the limiting plate 92 is driven by the rotation of the threaded column 93 to move To one side of the sealing chassis 63, and maintain a close contact with the inner wall of the sealing chassis 63, the threaded groove 64 and the limit plate 92 are maintained in a horizontal distribution, and the maximum spacing value of the limit plate 92 from the inner side of the sealing chassis 63 is maintained the same as the tensioning deformation amount of the elastic film 81. By setting the above-mentioned spacing of the limit plates 92 and the tensioning deformation amount of the elastic film 81, when the limit plate 92 is driven by the rotation of the threaded column 93 and moves to one side of the sealing chassis 63, the elastic film 81 is just stretched and reaches the required warning shape, thereby further improving the matching accuracy between the various structures.

[0043] One side of the electric wire 89A passes through the interior of the sealing chassis 63 and extends outward, and a circular through hole adapted to the electric wire 89A is provided inside the sealing chassis 63, and the thickness of the elastic film 81 and the distance between one side end of the inner sleeve 61 and the annular baffle 7 are adapted to each other. The setting of the circular through hole facilitates the subsequent operators to set up and move the electric wire 89A, and ensures the subsequent fixation;

[0044] After the sound wave moves from one side of the vertical surface 3 of the inner wall of the cavity 1 to the opposite side of the curved surface and is reflected, an acoustic focusing point is formed inside the pipe mouth 2, and the acoustic focusing point coincides with the dot of the elastic film 81. The steel string 82 is in a taut state. By coinciding the acoustic focusing point with the dot of the elastic film 81, the energy focusing point of the sound wave can effectively transmit its energy to the elastic film 81, thereby improving the sensitivity of its warning and increasing its working effect.

[0045] The distance between one side of the annular baffle 7 and the inner end of the pipe mouth 2 is greater than the thickness of the annular baffle 7, there is a gap between one side of the vertical plane 3 and the annular baffle 7, the length range of the external thread 62 is greater than the length range of the internal thread 5, and the connection between the sealing chassis 63 and the inner sleeve 61 is sealed and fixed by a rubber ring, and the outer side of the side baffle 65 and one side of the end of the inner sleeve 61 are maintained on the same horizontal plane, so that after the elastic film 81 is clamped, the edge height of the elastic film 81 when it is in the working state remains consistent, thereby ensuring the effective vibration of the elastic film 81 and avoiding the problem of sound wave conduction obstruction caused by inconsistent fixing ranges at both ends of the elastic film 81.

[0046] Specific reference Figure 3-Figure 6 The surfaces of the internal thread 5 and the external thread 62 are coated with a layer of lubricating grease. When the elastic film 81 is in working condition, one side close to the side baffle 65 is in contact with the surface of the inclined surface structure, and the other side of the elastic film 81 is in contact with the inner side of the annular baffle 7.

[0047] The elastic film 81 is clamped between the side baffle 65 and the annular baffle 7 so that the edge of the elastic film 81 can be stretched and clamped, thereby ensuring that the entire edge can be effectively clamped and stretched and deformed during the subsequent stretching process, thereby ensuring that the elastic film 81 can receive sound waves in a taut state, and increasing its sensitivity to sound waves, thereby further improving its practical effect.

[0048] Specific reference Fig.12 The annular baffle 7 and the side baffle 65 are both annular in structure as a whole, and the cross section of the annular baffle 7 is rectangular, and the elastic film 81 is made of styrene-based high elastic material as a whole.

[0049] The annular baffle 7 and the side baffle 65 are both annular in structure as a whole. When they clamp the elastic film 81, they only act within a certain range at the edge of the elastic film 81, and will not affect the normal deformation of the elastic film 81 as a whole and at the center, thereby ensuring its normal working effect. At the same time, the elastic film 81 is made of styrene material as a whole, so that it has good tensile strength and elasticity, excellent friction and fatigue resistance, and is inexpensive and good quality, which helps to reduce the cost of the internal wear parts structure of the equipment and improve the use value of the structure.

[0050] Working principle of the present invention:

[0051] Step 1: First, the operator assembles the various components of the device normally, and then uses the device normally.

[0052] Step 2: First, use the pipe mouth 2 on one side of the cavity 1 to perform threaded installation with the inner sleeve 61, and ensure that the annular baffle 7 and the side baffle 65 work together to clamp the elastic film 81 in the middle. At this time, the elastic film 81 is pre-fixed, and then the cavity 1 itself is pre-buried into the slope to be tested, and ensure that it is in full contact with the soil in the slope without a large gap. At the same time, ensure that the pipe mouth 2 and the inner sleeve 61 on one side of the cavity 1 are exposed to the outside to facilitate subsequent adjustments. Then twist the handle 94 to drive the threaded column 93 at the tail end to rotate, and make the threaded column 93 gradually rotate outward along the threaded notch 64 on the sealing chassis 63, and simultaneously drive the connecting rod 89 and the fixing column 91 to move laterally toward the side of the threaded column 93. At this time, the connecting rod 89 and the fixing column 91 are connected. The copper sleeve 88 at the end of the connecting rod 89 will rotate with the internal rotating notch 86 of the fixing seat 84, and pull the fixing seat 84 itself to move synchronously in the direction of the connecting rod 89. At this time, the vibrating wire sensor 83 at one end of the fixing seat 84 will drive the steel string 82 on one side thereof to stretch the elastic film 81 toward the tail end of the inner sleeve 61, until the threaded column 93 rotates to the limit plate 92 at its tail end to fit and contact with the inner side of the sealing bottom plate 63, thereby preventing the threaded column 93 from further rotating and extending outward. At this time, the elastic film 81 is subjected to the optimal stretching deformation, ensuring that it is in an inwardly concave arc shape, and deforming the two sides of its edges in contact with the inclined surface structure on the side baffle 65. At this time, the steel string 82 on one side of the elastic film 81 is also in a taut state, and the vibrating wire sensor 81 can be The wire 89A inside the sensor 83 is connected to the peripheral circuit. At this time, the internal structure of the slope is monitored together with the vibrating string sensor 83 through the cavity 1. When the slope is affected by the construction equipment and excavated, vibrations will be generated synchronously inside it, thereby generating arbitrary waves coupled with longitudinal waves and transverse waves. At this time, the sound waves will propagate outward through the soil medium and enter the interior of the cavity 1. When the sound waves propagate in the solid medium and encounter holes (i.e., cavity 1), reverberation will occur, which will concentrate the sound waves originally in propagation, making them clear and enhancing the energy of the local sound waves. Specifically, when the sound waves are emitted from the soil medium into the air medium inside the cavity 1, the sound waves will continuously reflect at the interface between the two media, so that part of the energy of the incident sound waves returns to the first medium. The medium can be reciprocated in this way, thereby achieving the working effect of virtual energy sound absorption (i.e., using the cavity 1 to concentrate the sound waves). At the same time, when the sound waves enter the cavity 1, they will be reflected by the vertical surface 3, and the sound waves will be emitted to the opposite side of the arc surface of the vertical surface 3, and the arc surface will reflect the sound waves again in a concentrated manner, and form a sound focusing point in front of it. At this time, the sound focusing point coincides with the elastic film 81, thereby effectively transmitting energy to the elastic film 81, and prompting it to accept the sound waves, and guide itself to vibrate at high frequency, and transmit the vibration to the steel string 82, thereby driving the steel string 82 to change its shape, and the signal is received by the vibrating string sensor 83, so that the signal is transmitted to the peripheral monitoring equipment unit through the vibrating string sensor 83.The vibration frequency of the internal structure of the slope is monitored in real time. When it exceeds the predetermined safety value range, it means that the stability of the internal structure of the slope has reached the critical value. At this time, the signal can be fed back to the control center in time through the monitoring equipment unit, so as to ensure that the control center can adjust the excavation range and construction machinery in time, notify the construction personnel, and give early warning, so as to ensure the safety of the construction, avoid the safety accidents of slope collapse caused by blind excavation, and further improve the safety of its engineering construction.

[0053] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0054] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0055] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An early warning device for bridge and culvert construction, comprising a cavity and a vibrating wire sensor, characterized in that: The cavity is ellipsoidal in shape as a whole, a pipe opening is connected to one side of the cavity, a vertical surface is arranged on the inner wall of the cavity on one side of the pipe opening, a circular hole matching the pipe opening is arranged on one side of the vertical surface, an internal thread is arranged on the inner wall of the pipe opening, and the inner wall of the cavity on the opposite side of the vertical surface and the inner wall extending to the surroundings on the opposite side are both arc-shaped surfaces; The internal thread of the pipe mouth is connected with an inner sleeve, the outer surface of the inner sleeve is provided with an external thread matching the internal thread, the end of the inner sleeve is fixedly sleeved with a sealing bottom plate, the middle of the sealing bottom plate is provided with a threaded notch, the end of the inner sleeve away from the sealing bottom plate is fixedly sleeved with a side baffle, the outer diameter of the inner sleeve is matched with the inner diameter of the pipe mouth, and the tail end of the sealing bottom plate is kept level with one side of the inner sleeve; An annular baffle is fixedly installed on the inner wall of the pipe mouth, and the inner wall of the side baffle is gradually distributed in an involute shape toward one end of the annular baffle and finally forms an inclined surface structure, and the inclined surface structure is rounded and transitioned with the end of the inner side of the side baffle away from the annular baffle and is arranged to be seamlessly connected, and the inner side surface of the side baffle is maintained at the same horizontal plane as the inner side of the annular baffle, and an elastic film is fixedly attached to one end of the inner sleeve and located on one side of the side baffle, and the side baffle is fitted with one side of the elastic film, and a steel string is fixedly arranged at the center position of one side of the elastic film, and a vibrating string sensor is fixedly arranged on the other end of the steel string, and a fixing seat is fixedly sleeved on the other end of the vibrating string sensor , the upper and lower ends of the fixing seat are respectively provided with a mounting groove and a rotating notch, one end of the rotating notch is connected with a connecting hole, the inner rotating sleeve of the rotating notch is connected with a copper sleeve, one end of the copper sleeve is fixedly installed with a connecting rod, the inner part of the vibrating string sensor is electrically connected with a wire, the working form of the elastic film is arc-shaped, and the arc-shaped concave part points to one side of the cavity, and the elastic film is in a tensioned state as a whole, the rotating notch and the copper sleeve are in a transition fit, the connecting hole and the connecting rod are in a clearance fit, and the copper sleeve is in a semi-closed structure toward the tail end of the connecting rod, and the centers of the vibrating string sensor, the fixing seat, the copper sleeve and the connecting rod are all located on the same central axis; A fixing column is fixedly installed at one end of the connecting rod, and the other end of the fixing column is fixedly connected to a limiting plate, and a threaded column is fixedly installed at the other end of the limiting plate, and the other end of the threaded column is fixedly connected to a handle, and the surface of the handle is inclined and has wear-resistant grooves. When the elastic film is in an arc shape as a whole, the limiting plate is driven by the rotation of the threaded column to move to one side of the sealing chassis and maintain a close contact with the inner wall of the sealing chassis. The threaded notch and the limiting plate are horizontally distributed, and the maximum spacing value between the limiting plate and the inner side of the sealing chassis is the same as the tension deformation of the elastic film; One side of the wire passes through the interior of the sealed chassis and extends outward, and a circular through hole adapted to the wire is provided inside the sealed chassis, and the thickness of the elastic film is adapted to the distance between one side end of the inner sleeve and the annular baffle.

2. The early warning device for bridge and culvert construction according to claim 1 is characterized by: The surfaces of the internal thread and the external thread are coated with a layer of lubricating grease. When the elastic film is in working condition, the side close to the side baffle is attached to the surface of the inclined surface structure, and the other side of the elastic film is attached to the inner side of the annular baffle.

3. The early warning device for bridge and culvert construction according to claim 1 is characterized by: The steel string is in a taut state.

4. The early warning device for bridge and culvert construction according to claim 1 is characterized by: The annular baffle and the side baffle are both annular in structure as a whole, and the cross section of the annular baffle is rectangular. The elastic film is made of styrene-based high elastic material as a whole.

5. The early warning device for bridge and culvert construction according to claim 1 is characterized by: The distance between one side of the annular baffle and the inner end of the pipe opening is greater than the thickness of the annular baffle, and there is a gap between one side of the vertical surface and the annular baffle.

6. The early warning device for bridge and culvert construction according to claim 1 is characterized by: The length range of the external thread is greater than the length range of the internal thread, and the connection between the sealing chassis and the inner sleeve is sealed and fixed by a rubber ring.

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