A monitoring device for a spherical bearing

Abstract

The present invention discloses a monitoring device for a spherical bearing, which relates to the technical field of bridge / building bearings and includes a lower bearing plate, a pressure-bearing body, a spherical support, an upper bearing plate, and a monitoring system; the spherical support is arranged between the upper bearing plate and the lower bearing plate, and the pressure-bearing body is arranged between the spherical support and the lower bearing plate; at least one through hole is provided on the lower bearing plate, and the monitoring system is arranged in the through hole. By means of distributed pressure sensors to sense the stress changes of the pressure-bearing body, real-time monitoring of the settlement of bridge piers and abutments and the comprehensive load conditions is achieved; the pressure sensors are externally arranged on the side wall of the lower bearing plate, and the installation and disassembly are very convenient. At the same time, the quantity and types of sensors can be adaptively adjusted according to the actual working conditions of the bearing. Preferably, the limiting structure of the pressure sensor is a detachable connection, which is convenient for maintenance and replacement, improves the accuracy and effectiveness of the monitoring data, and enhances the operation safety of the bridge bearing.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge / building bearings, and particularly to a monitoring device for a spherical bearing. Background Art

[0002] In the existing bridge design specification system, most of the bridge bearing loads and their force distribution parameters are calculated based on theoretical assumptions. Due to the lack of effective actual working test means, there is a certain error between the calculation results and the actual situation of the bearing. When the error is too large, it will cause abnormal bridge operation, form a large potential safety hazard, or result in material waste due to over-designed safety factor.

[0003] Therefore, adding real-time monitoring functions to bridges to achieve full-life-cycle health monitoring of bridges is a necessary prerequisite for the safety and economy of bridge design. Moreover, after the bridge is built, the piers and abutments will settle within a certain period, which will cause redistribution of internal forces in the bridge structure. If the settlement of the piers and abutments causes the simply supported box girder to be supported at three points, it may lead to catastrophic accidents. Therefore, timely understanding of the force condition of the bridge bearing, remotely warning of the three-point support when the vehicle crosses the bridge, and dealing with it in the first time is an economical and effective solution to avoid catastrophic accidents of the bridge.

[0004] In the prior art, the monitoring of the force condition of the bearing mainly relies on the pressure sensing unit. Due to the fact that the sensing unit is usually fixedly connected to the bearing body, if the sensing unit needs to be replaced, the entire bearing needs to be replaced, and the normal operating line needs to be shut down, which is costly and complex to operate. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a monitoring device for a spherical bearing that can perform real-time force monitoring on the full life cycle of the bridge bearing, is easy to assemble and disassemble, can timely repair and replace the internal sensor, and has a simple and compact structure and a reasonable design layout.

[0006] To achieve the above object, the present invention provides the following solution:

[0007] The present invention provides a monitoring device for a spherical bearing, including a lower bearing plate, a pressure-bearing body, a spherical support, an upper bearing plate, and a monitoring system; the spherical support is arranged between the upper bearing plate and the lower bearing plate, and the pressure-bearing body is arranged between the spherical support and the lower bearing plate; at least one through hole is provided on the lower bearing plate, and the monitoring system is arranged in the through hole.

[0008] Optionally, the axis of the through hole is along the radial direction of the pressure-bearing body.

[0009] Optionally, the monitoring system includes a pressure sensor and a force transfer pin. The top of the force transfer pin extends into the through hole and contacts the bottom of the pressure-bearing body, and the bottom of the force transfer pin contacts the pressure sensor.

[0010] Optionally, the monitoring system further includes a spacer and a wedge bar; the spacer is arranged at the bottom of the pressure sensor, and the wedge bar is arranged between the spacer and the lower support plate.

[0011] Optionally, a support surface is provided at the connection of the lower support plate with the extension line of the axis of the through hole, and the support surface is perpendicular to the axis of the through hole.

[0012] Optionally, the connection between the wedge bar and the lower support plate is detachable.

[0013] Optionally, a connection hole is provided through the wedge bar, and a threaded hole corresponding to the connection hole is provided on the lower support plate. The wedge bar is detachably connected to the lower support plate by passing a fastening bolt through the connection hole and screwing it into the threaded hole.

[0014] Optionally, the axial direction of the connection hole is perpendicular to the axial direction of the through hole.

[0015] Optionally, the monitoring system further includes a microcontroller and a wireless transmission module; both the pressure sensor and the wireless transmission module are electrically connected to the microcontroller.

[0016] Optionally, a limiting hole is provided on the lower support plate, the limiting hole is communicated with the through hole, and a limiting rod is arranged in the limiting hole.

[0017] The present invention has achieved the following technical effects compared with the prior art:

[0018] (1). Since the pressure sensor of the intelligent monitoring device is arranged on the lower support plate through a limiting mechanism, and several through holes for the force transfer pin to penetrate are provided. One end of the force transfer pin is connected to the pressure sensor, and the other end is connected to the pressure-bearing body in the groove of the upper support plate. The stress condition of the bridge bearing is reflected on the internal pressure-bearing body, and the stress change of the pressure-bearing body is sensed by the distributed pressure sensors, realizing the real-time monitoring of the settlement of the bridge pier and abutment and the comprehensive load condition.

[0019] (2). Compared with the traditional monitoring system with an integrally fixed and built-in structure, the pressure sensor of this monitoring device is externally arranged on the side wall of the lower support plate, and the installation and disassembly are very convenient. At the same time, the quantity and type of sensors can be adaptively adjusted according to the actual working conditions of the bearing. Preferably, the limiting structure of the pressure sensor is detachably connected, which is convenient for maintenance and replacement, improves the accuracy and effectiveness of the monitoring data, and enhances the operation safety of the bridge bearing. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the usage state of the monitoring device for the spherical bearing of the present invention;

[0022] Figure 2 It is a schematic top view structure diagram of the monitoring device for the spherical bearing of the present invention.

[0023] Description of the reference numerals: 1, lower bearing plate; 3, pressure sensor; 4, force transmission pin; 5, pressure-bearing body; 6, fastening bolt; 11, limiting hole; 12, limiting rod; 21, spacer block; 22, wedge-shaped strip; 41, channel; 71, microcontroller; 72, wireless transmission module. Detailed Embodiment

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] As Figure 1 and 2 shown, this embodiment provides a monitoring device for a spherical bearing, including a lower bearing plate 1, a pressure-bearing body 5, a spherical support, an upper bearing plate, and a monitoring system; the spherical support is arranged between the upper bearing plate and the lower bearing plate 1, and the pressure-bearing body is arranged between the spherical support and the lower bearing plate 1; four through holes are arranged on the lower bearing plate 1, and the four through holes are evenly distributed along the circumferential direction of the lower bearing plate 1, and the monitoring system is arranged in the through holes.

[0026] In this specific embodiment, the monitoring device for the spherical bearing includes at least one pressure sensor 3 with a limiting mechanism arranged around the outer circumference of the lower bearing plate 1. At least one through hole for the force transmission pin 4 to penetrate is arranged around the lower bearing plate 1. One end of the force transmission pin 4 is connected to the pressure sensor 3, and the other end is connected to the pressure-bearing body 5 in the groove of the lower bearing plate 1.

[0027] Its working principle is as follows: According to the actual application conditions, pressure sensors 3 are arranged around the lower bearing plate 1. One side of the pressure sensor 3 has a limiting mechanism, and the other side is connected to the force transmission pin 4. The force transmission pin 4 penetrates through the through-hole of the lower bearing plate 1. The upper end of the force transmission pin 4 is connected to the pressure-bearing body 5 in the groove of the lower bearing plate 1 (stress contact). When the bearing of the bridge or building is under pressure, the external force acts on the pressure-bearing body 5 inside it. Due to the stress consistency of the pressure-bearing body 5, the force on its upper part is fed back to the pressure sensor 3 through the force transmission pin 4, thus realizing the real-time monitoring function.

[0028] In the structure of the above-mentioned pressure-bearing body 5 force monitoring device, the number of pressure sensors 3 is 4, which are respectively located at the four corners of the cross of the lower bearing plate 1. Specifically, when installed, the 4 pressure sensors 3 are distributed in a vertical and horizontal cross pattern along the bridge deck. That is, two pressure sensors 3 are arranged along the traveling direction of the bridge deck, and the other two pressure sensors 3 are arranged along the direction perpendicular to the traveling direction of the bridge deck. Thus, it can quickly reflect the force condition of the bridge deck load change, and the monitoring data obtained by the pressure sensors 3 is more accurate, which is convenient for grasping the working conditions of the bridge in real time, transmitting the lateral stress received by the lower bearing plate 1 circumferentially to the pressure sensors 3. By analyzing the bearing monitoring data, the force condition can be understood and judged in time to ensure the safe use of the bearing.

[0029] One end of the pressure sensor 3 is in stress contact with the force transmission pin 4, and the other end is in stress contact with the groove of the cushion block 21.

[0030] The above-mentioned limiting mechanism also includes a pre-tightening structure, and the pre-tightening structure includes a cushion block 21 and a wedge-shaped strip 22. Among them, the cushion block 21 is in stress contact with the pressure sensor 3, and the wedge-shaped strip 22 is inserted into the gap between the cushion block 21 and the lower bearing plate 1. The bottom of the wedge-shaped strip 22 is supported by the support surface on the lower bearing plate. By inserting the cushion block 21, the force transmission pin 4 is respectively compacted and connected to the pressure-bearing body 5 and the pressure sensor 3, ensuring that the sensor receives data more sensitively, and also preventing the pressure sensor 3 from failing to feedback after the support has a large displacement. At the same time, this structure belongs to a detachable method. After the cushion block 21 is taken out, the pressure sensor 3 can be repaired and replaced, and the installation and disassembly are very convenient.

[0031] In order to facilitate the insertion of the wedge-shaped strip 22 into the gap between the lower bearing plate 1 and the cushion block 21, one side of the above-mentioned cushion block 21 is a progressive inclined surface that matches the shape of the wedge-shaped strip 22. That is, the top surface of the wedge-shaped strip 22 and the bottom surface of the cushion block 21 are two complementary inclined surfaces, making the contact between the wedge-shaped strip 22 and the cushion block 21 closer, and the reaction force on the pressure sensor 3 more constant. Further, a threaded through-hole is provided in the wedge-shaped strip 22, and the fastening bolt 6 passes through the threaded through-hole and is screwed and fixed to the threaded hole provided on the lower bearing plate 1.

[0032] The lower bearing plate 1 is provided with a limiting hole 11 communicated with the through hole. The surface of the force transfer pin 4 in the through hole has a channel 41 arranged along its axial direction. The limiting rod 12 is a screw rod or a pin shaft. The limiting rod 12 passes through the limiting hole 11 and is inserted into the channel 41. The limiting hole 11 and the through hole are preferably arranged vertically. After the limiting rod 12 is inserted, its end is placed in the channel 41 of the force transfer pin 4, that is, the force transfer pin 4 can move axially, sense the stress change of the sensing pressure body 5, and is in a restricted state in other directions. The force transfer pin 4 is not prone to deviation problems, ensuring the accuracy of the monitoring value of the pressure sensor 3. Of course, when the axial movement amount of the force transfer pin 4 is small, the channel 41 can also be replaced by a circular groove, as long as a suitable redundant space is ensured.

[0033] The pressure sensor 3 is a vibrating wire type sensor, with accurate measurement values, good working stability, low use cost, suitable for long-term monitoring, and good economic benefits. The pressure sensor 3 is electrically connected to the microcontroller 71. The microcontroller 71 has a wireless transmission module 72. The microcontroller 71 can collect sensing data and transmit the data in time through the wireless transmission module 72, such as connecting to a mobile phone or an upper computer through devices such as a SIM card and a SIM antenna, facilitating personnel to obtain data in time and perform further processing, improving the intelligent level of the bearing.

[0034] It should be noted that for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention, and any reference signs in the claims should not be regarded as limiting the claimed claims.

[0035] In this specification, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A monitoring device for a spherical bearing, characterized in that, It includes a lower support plate, a pressure-bearing body, a spherical support, an upper support plate and a monitoring system; the spherical support is arranged between the upper support plate and the lower support plate, and the pressure-bearing body is arranged between the spherical support and the lower support plate; at least one through hole is arranged on the lower support plate, and the monitoring system is arranged in the through hole; The monitoring system includes a pressure sensor and a force transmission pin. The top of the force transmission pin extends into the through hole and contacts the bottom of the pressure-bearing body, and the bottom of the force transmission pin contacts the pressure sensor; The monitoring system further includes a spacer and a wedge bar; the spacer is arranged at the bottom of the pressure sensor, and the wedge bar is arranged between the spacer and the lower support plate; A connection hole is penetrated through the wedge bar, and a threaded hole corresponding to the connection hole is arranged on the lower support plate. The wedge bar is detachably connected to the lower support plate by passing a fastening bolt through the connection hole and screwing it into the threaded hole.

2. The monitoring device for a spherical bearing according to claim 1, characterized in that, The axis of the through hole is along the radial direction of the pressure-bearing body.

3. The monitoring device for a spherical bearing according to claim 1, characterized in that, A support surface is arranged at the intersection of the extension line of the axis of the through hole on the lower support plate, and the support surface is perpendicular to the axis of the through hole.

4. The monitoring device for a spherical bearing according to claim 1, characterized in that, The axis direction of the connection hole is perpendicular to the axis direction of the through hole.

5. The monitoring device for a spherical bearing according to claim 1, characterized in that, The monitoring system further includes a microcontroller and a wireless transmission module; both the pressure sensor and the wireless transmission module are electrically connected to the microcontroller.

6. The monitoring device for a spherical bearing according to claim 1, characterized in that, A limiting hole is arranged on the lower support plate, the limiting hole is communicated with the through hole, and a limiting rod is arranged in the limiting hole.

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