Low-temperature ductile iron pipe cathodic protection wiring device

Abstract

This utility model discloses a low-temperature ductile iron pipe cathodic protection wiring device, relating to the field of metal pipe corrosion protection technology. It includes a connector body made of silicone material, and further includes: a composite pipe assembly, comprising a central pipe and left and right pipes connected to the left and right ends of the central pipe, with a quick-connect assembly at the top of the central pipe; and a control heating module, comprising a control box, the top of which is screwed to the control box, which contains a wireless communication module, a sensing module, a heating module, and a heat-conducting aluminum sheet. The wireless communication module is connected to a remote terminal signal. This utility model utilizes the sensing module to detect the temperature inside the composite pipe assembly in real time. When the temperature is low, the heating module controls the heat-conducting aluminum sheet to activate and heat the connector body, preventing the leakage current sensor from becoming less sensitive and failing to detect leakage current in low-temperature environments.

Description

Technical Field

[0001] This utility model relates to the field of metal pipeline corrosion protection technology, and in particular to a low-temperature ductile iron pipeline cathodic protection wiring device. Background Technology

[0002] Ductile iron pipes are used for water supply and drainage. Buried underground, they are susceptible to corrosion. Existing cathodic protection may have problems such as complex installation, difficult maintenance, and uneven protection. The connection structure between the anode and the pipe can be improved to ensure good conductivity.

[0003] Ductile iron pipes in cold regions are prone to accelerated corrosion due to permafrost expansion, low-temperature embrittlement of materials, and abnormal electrochemical reactions. Existing cathodic protection wiring devices suffer from seal failure due to the hardening and shrinkage of rubber sealing rings at low temperatures, allowing moisture infiltration and leakage. Traditional mounting nails lack sufficient pull-out resistance in frozen soil, and joints are prone to displacement, leading to wire detachment. Conventional leakage current sensors experience decreased sensitivity and failure in low-temperature environments. While existing technologies have improved fixing and detection functions, they have not optimized materials and temperature control logic for low-temperature environments, making them unsuitable for extremely cold regions. Based on these considerations, those skilled in the art have proposed a low-temperature cathodic protection wiring device for ductile iron pipes. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a low-temperature ductile iron pipe cathodic protection wiring device. This device utilizes a sensing module to monitor the temperature inside the composite pipe assembly in real time. When the temperature is low, the heating module controls the heat-conducting aluminum sheet to start heating the joint body, thus preventing the leakage current sensor from becoming less sensitive and failing to detect leakage current due to low pipe temperature.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The low-temperature ductile iron pipe cathodic protection wiring device includes a connector body made of silicone material, and also includes:

[0007] A composite pipe assembly, comprising a middle pipe and left and right pipes connected to the left and right ends of the middle pipe, wherein a quick-installation assembly is provided at the top of the middle pipe.

[0008] The control heating module includes a control box, the top of which is fitted with an end cap by screws. The control box contains a wireless communication module, a sensing module, a heating module, and a heat-conducting aluminum sheet. The wireless communication module is connected to a remote terminal signal. The control box also contains a power supply unit that provides independent power to the sensing module, the heating module, and the heat-conducting aluminum sheet. The control heating module is connected to the top of the intermediate tube via a quick-release assembly.

[0009] Preferably, the outer wall of the left tube is provided with a threaded connection, and a fluororubber sealing ring is embedded in the inner side of the threaded connection. The fluororubber sealing ring is tightened and compressed onto the inner wall of the connector body through the threaded connection.

[0010] Preferably, a leakage current detector is fitted onto the inner wall of the intermediate tube, and the leakage current detector is connected to the wireless communication module.

[0011] Preferably, the quick-connect assembly includes a quick-connect box and a sliding sealing sleeve that is slidably connected to the outside of the quick-connect box. The four side walls of the quick-connect box are slidably connected with self-locking pins, and a slot that matches the self-locking pins is opened on the top of the control box. A compression sealing ring is fixedly connected to the top of the quick-connect box, and the four side walls of the sliding sealing sleeve are provided with quick-release slots for inserting and removing the self-locking pins.

[0012] Preferably, the inner wall of the sliding sealing sleeve is provided with a sloped surface for compressing the sealing ring, and the sloped surface gradually narrows from top to bottom.

[0013] Preferably, the connection between the middle tube and the right and left tubes is provided with a clamp on the outside, and the right and left tubes are connected to the middle tube through the clamp. Mounting pins are provided at the pins on both sides of the clamp.

[0014] Preferably, the outer wall of the mounting pin is provided with a threaded structure, and the bottom of the mounting pin is provided with a tapered flare.

[0015] Preferably, the bottom of the intermediate pipe is provided with a groove for drainage, and a one-way permeable membrane is provided in the groove.

[0016] This utility model has the following beneficial effects:

[0017] In this invention, a sensing module is used to detect the temperature inside the composite pipe assembly in real time. When the temperature is low, the heating module controls the heat-conducting aluminum sheet to start and heat the connector body, thus avoiding the problem of the leakage sensor's sensitivity decreasing and leakage detection failing in low-temperature environments due to the low temperature inside the pipe.

[0018] In this invention, the sensing module, heating module, and heat-conducting aluminum sheet are powered by independent power supply units. Because they are powered by independent power supplies, the three units can be hot-swapped and replaced independently without interrupting power, reducing operational difficulty. At the same time, the control heating module can be quickly installed using quick-connect boxes and sliding sealing sleeves, which also improves the sealing between the control heating module and the composite tube assembly. Attached Figure Description

[0019] Figure 1 This is an overall diagram of the low-temperature ductile iron pipe cathodic protection wiring device proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the first internal structure of the control heating module in the low-temperature ductile iron pipe cathodic protection wiring device proposed in this utility model.

[0021] Figure 3 This is a schematic diagram of the second internal structure of the control heating module in the low-temperature ductile iron pipe cathodic protection wiring device proposed in this utility model.

[0022] Figure 4 This is an exploded view of the control heating module and quick-assembly assembly in the low-temperature ductile iron pipe cathodic protection wiring device proposed in this utility model.

[0023] Figure 5 This is a schematic diagram of the mechanism after concealing the left and right pipes and their connecting components in the low-temperature ductile iron pipe cathodic protection wiring device proposed in this utility model.

[0024] Figure 6 for Figure 5 A schematic diagram of the structure at point A in the middle.

[0025] Legend:

[0026] 1. Right tube; 2. Middle tube; 3. Left tube; 4. Clamp; 5. Mounting pin; 6. Threaded connection; 7. Fluororubber sealing ring; 8. Control box; 9. End cap; 10. Wireless communication module; 11. Sensing module; 12. Heating module; 13. Thermally conductive aluminum sheet; 14. Leakage detector; 15. Quick-connect box; 16. Sliding sealing sleeve; 17. Extrusion sealing ring; 18. Self-locking pin; 19. Quick-release groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example: Refer to Figures 1-3This utility model provides an embodiment of a low-temperature ductile iron pipe cathodic protection wiring device, including a connector body made of silicone material, and further including: a composite pipe assembly, which includes a middle pipe 2 and a left pipe 3 and a right pipe 1 connected to the left and right ends of the middle pipe 2, and a quick-connect assembly is provided on the top of the middle pipe 2; a control heating module, which includes a control box 8, with an end cover installed on the top of the control box 8 by screws, and a wireless communication module 10, a sensing module 11, a heating module 12 and a heat-conducting aluminum sheet 13 disposed inside the control box 8, wherein the wireless communication module 10 is connected to a remote terminal signal, and the control box 8 is also provided with a sensing module 11. Block 11, heating module 12 and heat-conducting aluminum sheet 13 are independently powered. Because they are powered by independent power supplies, the three units can be hot-swapped and replaced independently without interrupting power, reducing the difficulty of operation. The heating module is connected to the top of the intermediate tube 2 through a quick-release assembly. The heating module 12 uses a miniature heating element. The heat-conducting aluminum sheet 13 is plugged into the instrument with the miniature heating element. The heat generated by the heat-conducting aluminum sheet acts on the cavity of the connector body, thereby preventing the sealing ring from hardening and losing its sealing effect under low temperature. A leakage current detector 14 is embedded in the inner wall of the intermediate tube 2 and is connected to the sensing module 11.

[0029] It should be noted that the sensing module 11 continuously monitors the internal temperature, while the start and stop of the miniature heating element of the heating module 12 is controlled by a PID algorithm. When the detected temperature is below 0℃, the PID algorithm starts the heating module 12 to heat, and the heat is transferred to the sealing ring area through the thermally conductive aluminum sheet. After the temperature rises to 5℃, it automatically shuts off. The leakage current detector is an industrial-grade wide-temperature sensor. The heating status and energy consumption data will be fed back to the wireless communication module 10, and then uploaded to the remote platform through the LoRa module. The operating temperature range of the leakage current detector 14 is -40℃ to 85℃. The wireless communication module 10 can be selected as the Ebyte E52-400NW30S LoRa module, the sensing module 10 can be selected as the ZQWL PT100 temperature detection module, and the heating module 12 can be selected as the G3F-203S-VD.

[0030] Reference Figure 1 The outer wall of the left tube 3 is provided with a threaded connection part 6, and a fluororubber sealing ring 7 is embedded in the inner side of the threaded connection part 6. The fluororubber sealing ring 7 is tightened and compressed on the inner wall of the connector body through the threaded connection part 6. The connector body is made of silicone material. The silicone rubber and fluororubber are combined for sealing. The compression rate of the sealing ring is stable under low temperature conditions, and the hardness change rate is low. It can effectively prevent water leakage and electric leakage, and has good low temperature sealing performance. The compression rate of the fluororubber sealing ring 7 is 30%~40%, and the hardness change rate is ≤10% in the -40℃ environment.

[0031] Reference Figure 1 , Figures 4-6 The quick-connect assembly includes a quick-connect box 15 and a sliding sealing sleeve 16 that is slidably connected to the outside of the quick-connect box 15. Self-locking pins 18 are slidably connected to the four side walls of the quick-connect box 15. A slot is provided on the top of the control box 8 to fit the self-locking pins 18. A compression sealing ring 17 is fixedly connected to the top of the quick-connect box 15. Quick-release grooves 19 for inserting and removing the self-locking pins 18 are provided on the four side walls of the sliding sealing sleeve 16. The inner wall of the sliding sealing sleeve 16 has a sloped surface for compressing the compression sealing ring 17. The sloped surface gradually narrows from top to bottom. When the control heating module needs to be installed, the sliding sealing sleeve 16 is lifted upwards and... The quick-release slot 19 pulls out each self-locking pin 18 at once, and then the control heating module is placed in the quick-connect box 15. Then, the sliding sealing sleeve 16 is pressed down, and the slope surface of the sliding sealing sleeve 16 presses each self-locking pin 18, putting the self-locking pin 18 into the slot on the outer wall of the control box 8. At the same time, under the pressure of the slope surface of the sliding sealing sleeve 16, the compression sealing ring 17 on the top of the quick-connect box 15 will be pressed tightly between the control box 8 and the sliding sealing sleeve 16, thereby forming a tight seal and preventing liquid from seeping in from the gaps. This not only improves the ease of installation of the control heating module, but also improves the sealing performance between the control heating module and the composite pipe assembly.

[0032] Reference Figure 1 The middle pipe 2 is connected to the right pipe 1 and the left pipe 3 with clamps 4 on the outside. The right pipe 1 and the left pipe 3 are connected to the middle pipe 2 through the clamps 4. There are mounting nails 5 on both sides of the clamps 4. The outer wall of the mounting nail 5 has a threaded structure and the bottom of the mounting nail 5 has a conical flare. The bottom of the middle pipe 2 has a groove for drainage. At the same time, a one-way permeable membrane is installed in the groove. When installing the composite pipe assembly with the mounting nails 5, the mounting nails are screwed vertically into the frozen soil layer. The conical flare is used to compact the surrounding soil. Then the cable is passed through the right pipe 1 and the left pipe 3 in sequence. If there is accidental water seepage or condensation due to the temperature difference between the inside and outside, it can be discharged in time through the one-way permeable membrane to prevent the composite pipe assembly from freezing and bursting.

[0033] Working principle: When installing the composite pipe assembly using mounting nail 5, the mounting nail is screwed vertically into the frozen soil layer. The conical flare compacts the surrounding soil. Then, the cable is passed through the right pipe 1 and the left pipe 3 in sequence, and the threaded connection 6 is tightened to compress the fluororubber sealing ring 7 to 35%. Finally, the self-test program of the control heating module is started to confirm that the wireless communication module 10, the sensing module 11, the heating module 12, and the leakage detector 14 are functioning normally. The sensing module 11 continuously monitors the internal temperature. When the detected temperature is below 0℃, the PID algorithm starts the heating module to heat. The heat is transferred to the sealing ring area through the heat-conducting aluminum sheet 13. After the temperature rises to 5℃, it automatically shuts off. The heating status and energy consumption data are uploaded to the remote platform via the LoRa module. The leakage current detector 14 collects current signals in real time. If an abnormality is detected (such as current fluctuation ≥10%), it controls the heating module to trigger an audible and visual alarm and sends a fault code to the terminal via LoRa, marking the specific connector number and location. Maintenance personnel can log in to the terminal platform to view the real-time temperature, leakage status and historical alarm records of all connectors. It supports one-click generation of maintenance work orders, shortening fault response time and facilitating rapid maintenance.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cathodic protection wiring device for low temperature ductile cast iron pipes, comprising a joint body made of silicone, characterized in that: Also includes: A composite pipe assembly is located inside the connector body. The composite pipe assembly includes a middle pipe (2) and a left pipe (3) and a right pipe (1) connected to the left and right ends of the middle pipe (2). A quick-installation assembly is provided on the top of the middle pipe (2). The control heating module includes a control box (8), the top of which is fitted with an end cap (9) by screws. The control box (8) contains a wireless communication module (10), a sensing module (11), a heating module (12) and a heat-conducting aluminum sheet (13), wherein the wireless communication module (10) is connected to a remote terminal signal. Leakage detector (14), which is fitted and installed on the inner wall of the intermediate tube (2), and is connected to the wireless communication module (10) for signal transmission. The control box (8) is also equipped with a power supply unit that provides independent power to the sensing module (11), the heating module (12) and the heat-conducting aluminum sheet (13), and the control heating module is connected to the top of the intermediate tube (2) through a quick-connect assembly.

2. The low temperature ductile cast iron pipe cathodic protection bonding device according to claim 1, characterized in that: The outer wall of the left tube (3) is provided with a threaded connection part (6), and a fluororubber sealing ring (7) is embedded in the inner side of the threaded connection part (6). The fluororubber sealing ring (7) is tightened and compressed on the inner wall of the connector body through the threaded connection part (6).

3. The low temperature ductile cast iron pipe cathodic protection bonding device of claim 1, wherein: The quick-connect assembly includes a quick-connect box (15) and a sliding sealing sleeve (16) that is slidably connected to the outside of the quick-connect box (15). The four side walls of the quick-connect box (15) are slidably connected with self-locking pins (18), and a slot that matches the self-locking pins (18) is opened on the top of the control box (8). A compression sealing ring (17) is fixedly connected to the top of the quick-connect box (15), and the four side walls of the sliding sealing sleeve (16) are provided with quick-release slots (19) for inserting and removing the self-locking pins (18).

4. The low temperature ductile cast iron pipe cathodic protection bonding device according to claim 3, characterized in that: The inner wall of the sliding sealing sleeve (16) is provided with a sloped surface for pressing and squeezing the sealing ring (17), and the sloped surface gradually narrows from top to bottom.

5. The low temperature ductile cast iron pipe cathodic protection bonding device of claim 1, wherein: The middle tube (2) is connected to the right tube (1) and the left tube (3) with a clamp (4) on the outside. The right tube (1) and the left tube (3) are connected to the middle tube (2) through the clamp (4). Mounting nails (5) are provided at the pins on both sides of the clamp (4).

6. The low-temperature ductile iron pipeline cathodic protection wiring device according to claim 5, characterized in that: The outer wall of the mounting pin (5) is provided with a threaded structure, and the bottom of the mounting pin (5) is provided with a tapered flare.

7. The low-temperature ductile iron pipeline cathodic protection wiring device according to claim 1, characterized in that: The bottom of the intermediate pipe (2) is provided with a groove for drainage, and a one-way permeable membrane is provided in the groove.

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