Device for automatically monitoring radial displacement of pipeline

Abstract

The utility model discloses a device for automatically monitoring radial displacement of a pipeline, which defines the horizontal extension direction of the underground pipeline as the X direction, the horizontal vertical direction as the Y direction and the gravity direction as the Z. The device comprises an arch frame, a slide rheostat and a contact monitoring unit, a plurality of hanging brackets extending downwards to the position above the ground are fixedly arranged in the middle of the arch frame in the Z direction, and sliding rheostats are fixedly arranged at the bottoms of the hanging brackets. The bottom of the contact monitoring unit is fixedly attached to the upper portion of the underground pipeline, and the upper portion of the contact monitoring unit extends out of the ground in a lifting adjustment mode and is in electric contact connection with the slide rheostat. The device and the monitoring method can continuously monitor the radial displacement of the pipeline at high precision in real time, are high in precision and do not need to be attended manually.

Description

Technical Field

[0001] This utility model relates to the field of pipeline monitoring technology, specifically to a device for automatically monitoring the radial displacement of a pipeline. Background Technology

[0002] Construction work around pipelines may cause deformation and damage. Compared to radial displacement, axial displacement is smaller, therefore, radial displacement needs to be monitored more closely. Traditional monitoring methods are difficult to implement continuously and in real-time, and high monitoring frequency leads to high labor costs. Therefore, existing technologies need improvement and enhancement. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide an automatic device for monitoring the radial displacement of a pipeline. This device and monitoring method can monitor the radial displacement of the pipeline with high precision, in real time, and continuously, without the need for manual supervision.

[0004] To address the aforementioned problems, this utility model provides an automatic device for monitoring the radial displacement of a pipeline. The horizontal extension direction of the underground pipeline is defined as the X-direction, the horizontal vertical direction as the Y-direction, and the gravity direction as the Z-direction. The device includes an arch frame, a sliding rheostat, and a contact monitoring unit. The arch frame is erected on the ground above the pipeline along the X-direction. Multiple hangers extending downwards to the ground are fixed in the Z-direction of the arch frame, with the sliding rheostat fixed at the bottom of each hanger. The bottom of the contact monitoring unit is fixedly attached to the underground pipeline, and the upper part of the contact monitoring unit extends out of the ground and makes electrical contact with the sliding rheostat.

[0005] Preferably, the arch frame includes a main beam, hangers, and rigid legs. The main beam is erected above the ground along the X direction and its orthographic projection is aligned with the underground pipeline. Both ends of the main beam in the X direction are fixed with rigid legs on the ground in the Z direction. The lower part of the main beam extends in the Z direction and multiple hangers are arranged at intervals in the X direction.

[0006] Preferably, the bottom end of the rigid outrigger is fixed to the outrigger foundation on the ground by anchor bolts, and the top end of the rigid support is fixed to the ground by wind ropes and ground anchors.

[0007] Preferably, power lines and signal lines connecting multiple sliding rheostats are laid inside the main beam and hanger.

[0008] Preferably, the sliding rheostat includes a lateral rheostat and a longitudinal rheostat, and the lateral rheostat and the longitudinal rheostat are arranged at intervals at the bottom of multiple hangers.

[0009] Both the transverse and longitudinal rheostats include: a DC power supply, a parallel monitoring circuit, an insulating plate, and copper wires. The positive and negative terminals of the DC power supply are connected to the parallel monitoring circuit and the copper wires, respectively. Multiple first resistors are fixedly installed at intervals in the middle section of the copper wires, and the middle section of the copper wires is repeatedly bent and arranged on the insulating plate. The insulating plate is fixedly suspended at the bottom of the hanger. The insulating plate forms a U-shaped structure with an open bottom, and the copper wires on the two opposite sidewalls of the insulating plate make electrical contact with the two contacts of the parallel monitoring circuit. The parallel monitoring circuit includes two series circuits connected in parallel. Each series circuit includes a digital ammeter and a second resistor connected in series.

[0010] Preferably, the copper wires of the transverse rheostat are laid out by bending laterally on the insulating plate; the copper wires of the longitudinal rheostat are laid out by bending longitudinally on the insulating plate.

[0011] Preferably, the contact monitoring unit includes a base, a telescopic rod, and contacts; the base is fixedly mounted on the upper part of the circumferential outer wall of the underground pipeline, and long leveling tubes are fixed on the top surface of the base in the X and Y directions respectively; the telescopic rod includes an outer tube, an inner rod, and contact rods, wherein the bottom end of the outer tube is fixed in the middle of the base, the top end of the outer tube extends out of the ground in the Z direction, and the top end of the outer tube is fixed to the inner rod by a lifting pin; multiple contact rods are fixed at intervals in the Z direction and in the X direction at the top end of the inner rod; a spring and a contact are sleeved on the contact rod, wherein the contact is sleeved on the free end of the contact rod, and the axial end face of the contact is elastically supported by the spring.

[0012] The advantages of this utility model compared with the prior art are as follows:

[0013] This utility model discloses an automatic device for monitoring the radial displacement of a pipeline. A contact monitoring unit, fixedly mounted on the underground pipeline, transmits the radial deformation displacement of the pipeline. The contact monitoring unit electrically contacts a sliding rheostat to measure the resistance of the pipeline's radial deformation. Finally, an arch frame positions and mounts the sliding rheostat to ensure its monitoring position accuracy. Based on the relative displacement between the sliding rheostat and the contact monitoring unit, the resistance value of their electrical connection is monitored, thereby calculating the deformation of the underground pipeline.

[0014] This utility model discloses an automatic device for monitoring the radial displacement of a pipeline. It uses a variable resistor to automatically monitor the radial displacement of the pipeline, achieving high monitoring accuracy. This monitoring method can achieve continuous monitoring. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view of the pipeline radial displacement monitoring device in this utility model;

[0017] Figure 2 This is a side view of the radial displacement monitoring device for pipelines in this utility model;

[0018] Figure 3 This is a schematic diagram of the contact monitoring unit in this utility model;

[0019] Figure 4 This is a circuit connection diagram of the sliding rheostat (vertical rheostat) in this utility model;

[0020] Figure 5 This is a circuit connection diagram of the sliding rheostat (horizontal rheostat) in this utility model;

[0021] Figure 6 This is a schematic diagram illustrating the calculation of pipeline displacement in this utility model;

[0022] In the diagram: 1-Main beam; 2-Hanger; 3-Sliding rheostat; 4-Contact monitoring unit; 5-Rigid support leg; 6-Underground pipe; 7-Inner rod; 8-Contact rod; 9-Spring; 10-Contact; 11-Outer pipe; 12-Long level tube; 13-Base; 14-Copper wire; 15-Insulation board; 16-First resistor; 17-Contact; 18-Second resistor; 19-Digital ammeter. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] Combination Figures 1-6This utility model provides a device for automatically monitoring the radial displacement of a pipeline. The horizontal extension direction of the underground pipeline 6 is defined as the X direction, the horizontal vertical direction as the Y direction, and the gravity direction as the Z direction. The device includes an arch frame, a sliding rheostat 3, and a contact monitoring unit 4. The arch frame is erected on the ground above the pipeline along the X direction. Multiple hangers extending downward to the ground are fixed in the middle of the arch frame along the Z direction. The sliding rheostat is fixed at the bottom of the hangers. The bottom of the contact monitoring unit is fixedly attached to the underground pipeline. The upper part of the contact monitoring unit extends out of the ground and is electrically connected to the sliding rheostat.

[0027] Preferably, the arch frame includes a main beam 1, a hanger 2, and rigid legs 5. The main beam is erected above the ground along the X direction and its orthographic projection is aligned with the underground pipeline. Both ends of the main beam in the X direction are fixed with rigid legs on the ground in the Z direction. The lower part of the main beam extends in the Z direction and multiple hangers are arranged at intervals in the X direction.

[0028] Preferably, the bottom end of the rigid outrigger is fixed to the outrigger foundation on the ground by anchor bolts, and the top end of the rigid support is fixed to the ground by wind ropes and ground anchors.

[0029] Preferably, power lines and signal lines connecting multiple sliding rheostats are laid inside the main beam and hanger.

[0030] Preferably, the sliding rheostat includes a lateral rheostat and a longitudinal rheostat, and the lateral rheostat and the longitudinal rheostat are arranged at intervals at the bottom of multiple hangers.

[0031] Both the transverse and longitudinal rheostats include: a DC power supply, a parallel monitoring circuit, an insulating plate 15, and copper wires 14. The positive and negative terminals of the DC power supply are connected to the parallel monitoring circuit and the copper wires, respectively. Multiple first resistors 16 are fixedly installed at intervals in the middle section of the copper wires, and the middle section of the copper wires is repeatedly bent and arranged on the insulating plate. The insulating plate is fixedly suspended at the bottom of the hanger. The insulating plate forms a U-shaped structure with an open bottom end, and the copper wires on the two opposite sidewalls of the insulating plate are electrically connected to the two contacts 17 of the parallel monitoring circuit. The parallel monitoring circuit includes two series circuits connected in parallel. Each series circuit includes a digital ammeter 19 and a second resistor 18 connected in series.

[0032] Preferably, the copper wires of the transverse rheostat are laid out by bending laterally on the insulating plate; the copper wires of the longitudinal rheostat are laid out by bending longitudinally on the insulating plate.

[0033] Preferably, the contact monitoring unit includes a base 13, a telescopic rod, and a contact 10; the base is fixedly mounted on the upper part of the circumferential outer wall of the underground pipeline, and long leveling tubes 12 are fixed on the top surface of the base in the X and Y directions respectively; the telescopic rod includes an outer tube 11, an inner rod 7, and contact rods 8, wherein the bottom end of the outer tube is fixed in the middle of the base, the top end of the outer tube extends out of the ground in the Z direction, and the top end of the outer tube is fixed to the inner rod by a lifting pin; multiple contact rods are fixed at intervals in the Z direction and in the X direction at the top end of the inner rod; a spring 9 and a contact are sleeved on the contact rod, wherein the contact is sleeved on the free end of the contact rod, and the axial end face of the contact is elastically supported by the spring.

[0034] A monitoring method for an automatic monitoring device for radial displacement of a pipeline includes the following aspects:

[0035] a) When monitoring the radial displacement of the pipeline, first excavate downwards from the ground surface, and after the pipeline is exposed, remove the soil above the pipeline; then install the base, and fix the base to the outer wall of the pipeline with adhesive;

[0036] b) The main beam and hangers of the arch frame are assembled from several trusses by bolts; the length of the main beam and the length of the hangers are determined according to the site conditions; the arch frame is fixed to the ground by leg foundations and wind ropes;

[0037] c) The measuring point consists of a base, an outer tube, an inner rod, a contact rod, and a fixing pin; the inner rod has several round holes along the height direction, the outer tube has two round holes at the same height, and the inner rod is fixed to the outer tube by the fixing pin;

[0038] d) The DC power supply is a constant voltage source; the copper wires and the first resistor are connected in series and fixed on the insulating plate in an S-shape; the parallel copper wires are spaced equally, and the spacing between the copper wires is no more than 0.5mm; the contacts are connected in series with the second resistor and the digital ammeter; the contact rod and the contact head are made of metal as contacts on the copper wires; when the position of the metal contact changes, the current value of the digital ammeter also changes accordingly, and the change in current is transmitted to the controller through the signal line.

[0039] In a transverse rheostat, the horizontal displacement of the metal contacts is linearly related to the change in current.

[0040] In a longitudinal rheostat, the vertical displacement of the metal contacts is linearly related to the change in current.

[0041] f) The controller automatically converts the change in current into the horizontal or vertical displacement of the measuring point;

[0042] e) The horizontal and vertical displacements of each measuring point can be transmitted to the receiving terminal via wireless signals generated by a wireless signal generator installed on the support. When the displacement change rate (mm / d) or the cumulative displacement value (mm) exceeds the set alarm value, the alarm will issue an alarm signal to remind the monitoring personnel to pay attention.

[0043] e) The equipment is powered by either the power grid or a diesel generator is installed on-site;

[0044] f) The monitoring frequency is set manually; the monitoring equipment can automatically monitor and record monitoring data according to the set monitoring frequency.

[0045] The working principle of this utility model is as follows: When a pipeline undergoes changes in its surrounding environment (such as excavation or piling), it will experience displacement and deformation. Excessive deformation may lead to pipeline cracking and subsequent accidents (such as gas leaks or water gushing). Therefore, timely monitoring of pipeline displacement is crucial. Compared to the radial displacement of the pipeline, the axial displacement is smaller, so the radial displacement needs to be monitored more closely. The radial displacement of the pipeline can be decomposed into horizontal displacement ΔX, vertical displacement ΔY, and rotation angle Δθ. When installing the measuring point, the plumbness of the inner rod must be ensured. The inner rod is in the plumb direction when the bubbles of the two mutually perpendicular long spirit levels above the base are centered. Record the radius R of the pipeline at the measuring point (distance from the center to the outer surface of the pipeline), the distance H1 from the outer diameter of the pipeline to contact 2, the distance H2 from contact 1 to contact 2, and the distance L from contact 1 to the center of the pipeline = R + H1 + H2. Input the above values ​​into the controller. The controller can record these values ​​and set the coordinates of the pipe center point to (0,0), the coordinates of contact 1 to (X1, Y1) (where X1 = 0, Y1 = L), and the coordinates of contact 2 to (X2, Y2) (where X2 = 0, Y2 = R + H1). When the pipe at the measuring point is displaced (e.g., ... Figure 6 When contacts 1 and 2 move to new positions, since the changes in horizontal and vertical displacement of the contacts are proportional to the changes in current (the proportional coefficient is calibrated in advance and stored in the controller), the coordinate increments of the contacts in the X and Y directions can be calculated based on the changes in current, and thus the new coordinates of contact 1 (X3, Y3) and contact 2 (X4, Y4) can be obtained.

[0046] Then, the horizontal displacement ΔX = X3 - X1 + LsinΔθ, the vertical displacement ΔY = Y3 - Y1 + L(1 - cosΔθ), and the pipe rotation angle Δθ = arctan(X1 - X2) / (Y1 - Y2) - arctan(X3 - X4) / (Y3 - Y4) are calculated at the measuring point.

[0047] The automatic monitoring device for radial displacement of pipelines mainly consists of a support frame, measuring points, a sliding rheostat, a power supply, cables, a controller, a wireless signal generator, and a receiving device. Monitoring includes the following steps:

[0048] a) Remove the soil above the test points (test point 1, test point 2, test point 3, etc.) and clean the outer surface of the pipeline. Install the test point bases, and fix the bases to the pipeline with adhesive;

[0049] b) Install rigid outriggers, main beams, hangers, anchor bolts, outrigger foundations, guy ropes, ground anchors, etc. to form a rigid support structure;

[0050] c) Install the sliding rheostat, equipment power supply, controller, wireless signal generator, and receiving equipment;

[0051] d) Install the outer tube and inner rod of the measuring point, adjust the height of the inner rod and fix it to the outer tube with the fixing pin.

[0052] e) Check the contact between the contacts and the sliding rheostat to ensure good contact.

[0053] f) Debug the equipment and set the monitoring frequency (e.g., 1 time / h).

[0054] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A device for automatically monitoring the radial displacement of a pipeline, defining the horizontal extension direction of the underground pipeline as the X-direction, the horizontal and vertical direction as the Y-direction, and the gravity direction as the Z-direction, characterized in that: The device includes an arch frame, a sliding rheostat, and a contact monitoring unit. The arch frame is erected on the ground above the pipeline along the X direction. Multiple hangers extending downwards to the ground are fixed in the middle of the arch frame along the Z direction. The sliding rheostat is fixed at the bottom of the hangers. The bottom of the contact monitoring unit is fixedly attached to the underground pipeline. The upper part of the contact monitoring unit extends out of the ground and is electrically connected to the sliding rheostat.

2. The device for automatically monitoring the radial displacement of a pipeline according to claim 1, characterized in that: The arch frame includes a main beam, hangers, and rigid legs. The main beam is erected above the ground along the X direction and its orthographic projection is aligned with the underground pipeline. Both ends of the main beam in the X direction are fixed with rigid legs on the ground in the Z direction. The lower part of the main beam extends in the Z direction and multiple hangers are arranged at intervals in the X direction.

3. The device for automatically monitoring the radial displacement of a pipeline according to claim 2, characterized in that: The bottom end of the rigid support leg is fixed to the support leg foundation on the ground by anchor bolts, and the top end of the rigid support is fixed to the ground by wind ropes and ground anchors.

4. The device for automatically monitoring the radial displacement of a pipeline according to claim 2, characterized in that: The main beam and hanger are equipped with power lines and signal lines that connect to multiple sliding rheostats.

5. The device for automatically monitoring the radial displacement of a pipeline according to claim 1, characterized in that: The sliding rheostat includes a horizontal rheostat and a vertical rheostat, and the horizontal rheostat and the vertical rheostat are arranged at intervals at the bottom of multiple hangers. Both the transverse and longitudinal rheostats include: a DC power supply, a parallel monitoring circuit, an insulating plate, and copper wires. The positive and negative terminals of the DC power supply are connected to the parallel monitoring circuit and the copper wires, respectively. Multiple first resistors are fixedly installed at intervals in the middle section of the copper wires, and the middle section of the copper wires is repeatedly bent and arranged on the insulating plate. The insulating plate is fixedly suspended at the bottom of the hanger, and the insulating plate forms a U-shaped structure with an open bottom. The copper wires on the two opposite sidewalls of the insulating plate are electrically connected to the two contacts of the parallel monitoring circuit. The parallel monitoring circuit includes two series circuits connected in parallel, and each series circuit includes a digital ammeter and a second resistor connected in series.

6. The device for automatically monitoring the radial displacement of a pipeline according to claim 5, characterized in that: The insulating plate of the transverse rheostat is folded laterally with copper wires; the insulating plate of the longitudinal rheostat is folded longitudinally with copper wires.

7. The device for automatically monitoring the radial displacement of a pipeline according to claim 1, characterized in that: The contact monitoring unit includes a base, a telescopic rod, and contacts. The base is fixedly mounted on the upper part of the circumferential outer wall of the underground pipeline, and long leveling tubes are fixed on the top surface of the base in the X and Y directions respectively. The telescopic rod includes an outer tube, an inner rod, and contact rods. The bottom end of the outer tube is fixed in the middle of the base, and the top end of the outer tube extends out of the ground in the Z direction. The top end of the outer tube is fixed to the inner rod by a lifting pin. Multiple contact rods are fixed at intervals in the Z direction and in the X direction at the top end of the inner rod. A spring and a contact are sleeved on the contact rod, wherein the contact is sleeved on the free end of the contact rod, and the axial end face of the contact is elastically supported by the spring.

Images