A heating device for electric heating tube of resin repair of sewer pipe

Abstract

This utility model relates to the field of drainage pipes and discloses a heating device for resin repair of drainage pipes using an electric heating element. The device includes an air pump, with a first connecting pipe connected to the output end of the air pump. A pressure regulating valve is fixedly installed on the first connecting pipe. A first flange is provided at the end of the first connecting pipe away from the air pump. An air heater is fixedly connected to the first connecting pipe through the first flange, and the first connecting pipe is connected to the air inlet of the air heater. In this utility model, precise heating is achieved through the combination of an air heater and an electric heating element. Heat loss is reduced by using an electric heating tape and insulation cotton. A thermocouple sensor monitors the temperature in real time and provides feedback to a display. The resin curing environment temperature can be flexibly adjusted via a temperature control knob. This design effectively solves the problem of low curing efficiency at low temperatures, shortens the curing cycle, ensures stable curing temperature, improves the adhesion strength between the repair layer and the pipe wall, and guarantees repair quality.

Description

Technical Field

[0001] This utility model relates to the field of drainage pipes, and in particular to a heating device for resin repair of drainage pipes with electric heating tubes. Background Technology

[0002] Drainage pipes are a crucial component of urban water circulation systems. Long-term exposure to corrosive media and external forces can easily lead to localized defects, which, if not repaired promptly, can cause leaks and a decline in the network's functionality. Trenchless resin repair has become a mainstream solution due to its high efficiency and low cost. However, the low construction efficiency in low-temperature environments urgently needs to be addressed. Developing precise temperature and pressure control repair equipment adaptable to various scenarios is of great significance for ensuring the stable operation of the pipe network.

[0003] Existing pipe resin repair methods mostly involve inflating the repair airbag with an air pump, using the airbag pressure to fix the resin material, and relying on ambient temperature or a simple heat source to achieve curing. Common repair airbags only have a single air inlet or outlet to adjust the inflation pressure.

[0004] However, existing technologies lack effective temperature control and heat preservation mechanisms in low-temperature environments, making it difficult to maintain the resin curing temperature within the optimal range. This results in prolonged curing cycles and insufficient bonding strength of the repair layer. To address these issues, a heating device for the electric heating tube of a drainage pipe resin repair is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a heating device for electric heating tubes used in the repair of resin in drainage pipes, which aims to solve the problem of lack of effective temperature control in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a heating device for resin repair of drainage pipes, comprising an air pump, wherein the output end of the air pump is connected to a first connecting pipe, a pressure regulating valve is fixedly installed on the first connecting pipe, a first flange is provided at the end of the first connecting pipe away from the air pump, and an air heater is fixedly connected to the first connecting pipe through the first flange, and the first connecting pipe is connected to the air inlet of the air heater.

[0007] The air outlet of the air heater is connected to a second connecting pipe. The end of the second connecting pipe away from the air heater is provided with a second flange. The second connecting pipe is connected to an air inlet pipe through the second flange. The end of the air inlet pipe away from the second connecting pipe is connected to a repair airbag.

[0008] As a further description of the above technical solution: a thermocouple sensor and a pressure sensor are fixedly installed on the second connecting pipe, and the pressure sensor is located to the right of the thermocouple sensor.

[0009] As a further description of the above technical solution: an electric heating tape is wrapped around the outer wall of the air intake pipe, and the outer wall of the electric heating tape is fixedly covered with heat insulation cotton.

[0010] As a further description of the above technical solution: a display is provided on the left side of the air heater, and a switch and a temperature control knob are provided on the left side of the air heater.

[0011] As a further description of the above technical solution: a high-pressure air pipe is connected to the right side of the repair airbag, and a detector is fixedly installed at the end of the high-pressure air pipe away from the repair airbag.

[0012] As a further description of the above technical solution: the top of the detector is equipped with two audible and visual alarms, which are symmetrically arranged on the top of the detector.

[0013] As a further description of the above technical solution: a tubular endoscope is fixedly installed on the left side of the repair airbag, and a lighting lamp is fixedly installed on the left side of the repair airbag.

[0014] As a further description of the above technical solution: six guide wheels are fixedly installed on the side of the repair airbag, and the six guide wheels are symmetrically arranged on both sides of the repair airbag.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, precise heating is achieved by combining an air heater and an electric heating tube. The electric heating tape and insulation cotton are used to reduce heat loss. The thermocouple sensor monitors the temperature in real time and feeds it back to the display. The temperature of the resin curing environment can be flexibly adjusted by the temperature control knob. This design effectively solves the problem of low curing efficiency at low temperatures, shortens the curing cycle, ensures stable curing temperature, improves the bonding strength between the repair layer and the pipe wall, and ensures the repair quality.

[0017] 2. In this utility model, a detection port is added to realize real-time monitoring of parameters inside the airbag. It forms a stable pressure control system with the pressure sensor and pressure regulating valve. The dual audible and visual alarm can promptly warn of over-temperature and over-pressure risks. In addition, the configuration of guide wheels, lighting lamps and pipeline endoscopes improves the accuracy of airbag positioning and construction visibility. The overall structure takes into account both practicality and safety, and is suitable for pipeline repair needs in multiple scenarios. Attached Figure Description

[0018] Figure 1 This is a front view of an electric heating device for resin repair of drainage pipes proposed in this utility model.

[0019] Figure 2This is a side view of an electric heating device for resin repair of drainage pipes proposed in this utility model.

[0020] Figure 3 This is a partial schematic diagram of an electric heating device for resin repair of drainage pipes proposed in this utility model.

[0021] Figure 4 This utility model proposes a heating device for resin repair of drainage pipes using an electric heating tube. Figure 2 Enlarged view of point A in the image.

[0022] Legend:

[0023] 1. Air pump; 2. First connecting pipe; 3. Air heater; 4. Pressure regulating valve; 5. Second connecting pipe; 6. Air inlet pipe; 7. Repair airbag; 8. Thermocouple sensor; 9. Pressure sensor; 10. Electric heating tape; 11. Insulation cotton; 12. Display; 13. Switch; 14. Temperature control knob; 15. High-pressure air pipe; 16. Detector; 17. Audible and visual alarm; 18. Pipe endoscope; 19. Lighting lamp; 20. Guide wheel. Detailed Implementation

[0024] 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.

[0025] Reference Figure 1 - Figure 4This utility model provides an embodiment of a heating device for a resin repair heating tube in drainage pipes, comprising an air pump 1 for inflating a repair airbag 7. A first connecting pipe 2 is connected to the output end of the air pump 1 for connecting to an air heater 3. A pressure regulating valve 4 is fixedly installed on the first connecting pipe 2 to facilitate pressure adjustment of the air pump 1. A first flange is provided at the end of the first connecting pipe 2 away from the air pump 1. The air heater 3 is fixedly connected to the first connecting pipe 2 through the first flange for heating the gas from the air pump 1. The first connecting pipe 2 is connected to the air inlet of the air heater 3. The left side of the air heater 3 is... The air heater 3 has a display 12 for showing the temperature of the heated air. A switch 13 and a temperature control knob 14 are located on the left side of the air heater 3 to control the air heating temperature. A second connecting pipe 5 is connected to the air outlet of the air heater 3. A thermocouple sensor 8 and a pressure sensor 9 are fixedly installed on the second connecting pipe 5, with the pressure sensor 9 located to the right of the thermocouple sensor 8. The thermocouple sensor 8 monitors the air temperature inside the second connecting pipe 5 in real time and displays it on the display 12. The pressure sensor 9 detects the air pressure inside the second connecting pipe 5. A second flange is located at the end of the second connecting pipe 5 furthest from the air heater 3. The second connecting pipe 5 is connected to an air inlet pipe 6 via a second flange, used to deliver gas into the repair airbag 7. An electric heating tape 10 is wrapped around the outer wall of the air inlet pipe 6 to heat it. Insulation cotton 11 is fixedly fitted onto the outer wall of the electric heating tape 10 to insulate the gas inside the air inlet pipe 6. The end of the air inlet pipe 6 furthest from the second connecting pipe 5 is connected to the repair airbag 7. A tubular endoscope 18 is fixedly installed on the left side of the repair airbag 7 for monitoring the inside of the tubing. A lighting lamp 19 is fixedly installed on the left side of the repair airbag 7 to provide illumination for the tubular endoscope 18. A guide is fixedly installed on the side of the repair airbag 7. There are six guide wheels 20, which are symmetrically arranged on both sides of the repair airbag 7. A high-pressure air pipe 15 is connected to the right side of the repair airbag 7. A detector 16 is fixedly installed at the end of the high-pressure air pipe 15 away from the repair airbag 7. The detector 16 monitors the temperature and pressure of the gas inside the repair airbag 7. Two audible and visual alarms 17 are installed on the top of the detector 16. The two audible and visual alarms 17 are symmetrically arranged on the top of the detector 16. When the temperature and pressure of the gas inside the repair airbag 7 exceed the standard, the two audible and visual alarms will be triggered respectively.

[0026] Working principle: Turn on the switch 13 of the air heater 3, set the target heating temperature using the temperature control knob 14, start the air pump 1 to generate gas, and deliver the gas to the air heater 3 via the first connecting pipe 2. As the gas flows within the first connecting pipe 2, the pressure is regulated by the pressure regulating valve 4 to ensure the gas pressure meets the working requirements of the repair airbag 7. After entering the air inlet of the air heater 3, the gas is heated by the internal electric heating element. The heated gas flows from the air outlet into the second connecting pipe 5. Thermocouple sensor 8 on the second connecting pipe 5 monitors the temperature of the heated gas in real time, and pressure sensor 9 simultaneously monitors the gas pressure. The data is synchronously fed back to the display 12 on the left side of the air heater 3 for the operator to view in real time. The electric heating tape 10 on the outer wall of the air inlet pipe 6 provides continuous heating, and the outer insulation cotton 11 reduces heat loss. To ensure the gas maintains the set temperature during delivery, constant-temperature and constant-pressure gas is delivered into the repair airbag 7 through the air inlet pipe 6. The gas filling causes the repair airbag 7 to expand, tightly adhering to the inner wall of the pipe and compacting the resin repair material. The lighting lamp 19 on the left side of the repair airbag 7 provides illumination, and the pipe endoscope 18 transmits the repair status inside the pipe in real time, allowing operators to observe the adhesion and material laying status. The gas inside the repair airbag 7 is connected to the detector 16 through the high-pressure air pipe 15. The detector 16 continuously monitors the temperature and pressure inside the airbag. When the parameters exceed the safety threshold, the corresponding audible and visual alarm 17 is activated to issue an alarm prompt. After maintaining the airbag pressure and temperature until the resin material is completely cured, the air pump 1 and air heater 3 are turned off, and the gas inside the airbag is slowly released. After the airbag contracts, it is removed, completing the pipe repair.

[0027] It is worth noting that in this embodiment, the electrical equipment is a common device in the prior art, and the model used can be customized according to actual usage requirements. The power supply interface of the electrical equipment in this utility model is connected to the power supply system through a switch (not shown in the figure) and a wire (not shown in the figure) to realize its control. The circuits and controls involved are all prior art and are known in the current field, so they will not be described in detail here.

[0028] 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 heating device for resin repair of drainage pipes, comprising an air pump (1), characterized in that: The output end of the air pump (1) is connected to a first connecting pipe (2), a pressure regulating valve (4) is fixedly installed on the first connecting pipe (2), a first flange is provided at the end of the first connecting pipe (2) away from the air pump (1), an air heater (3) is fixedly connected to the first connecting pipe (2) through the first flange, and the first connecting pipe (2) is connected to the air inlet of the air heater (3). The air outlet of the air heater (3) is connected to a second connecting pipe (5). A second flange is provided at the end of the second connecting pipe (5) away from the air heater (3). An air inlet pipe (6) is connected to the second connecting pipe (5) through the second flange. A repair airbag (7) is connected to the end of the air inlet pipe (6) away from the second connecting pipe (5).

2. The electric heating device for resin repair of drainage pipes according to claim 1, characterized in that: The second connecting pipe (5) is fixedly installed with a thermocouple sensor (8) and a pressure sensor (9), and the pressure sensor (9) is located to the right of the thermocouple sensor (8).

3. The electric heating device for resin repair of drainage pipes according to claim 1, characterized in that: The outer wall of the air inlet pipe (6) is wrapped with an electric heat tracing tape (10), and the outer wall of the electric heat tracing tape (10) is fixedly covered with heat insulation cotton (11).

4. The electric heating device for resin repair of drainage pipes according to claim 1, characterized in that: A display (12) is provided on the left side of the air heater (3), and a switch (13) and a temperature control knob (14) are provided on the left side of the air heater (3).

5. The electric heating device for resin repair of drainage pipes according to claim 1, characterized in that: A high-pressure air tube (15) is connected to the right side of the repair airbag (7), and a detector (16) is fixedly installed at the end of the high-pressure air tube (15) away from the repair airbag (7).

6. The electric heating device for resin repair of drainage pipes according to claim 5, characterized in that: The detector (16) is equipped with two audible and visual alarms (17) on its top. The two audible and visual alarms (17) are symmetrically arranged on the top of the detector (16).

7. The electric heating device for resin repair of drainage pipes according to claim 1, characterized in that: A tubular endoscope (18) is fixedly installed on the left side of the repair airbag (7), and a lighting lamp (19) is fixedly installed on the left side of the repair airbag (7).

8. The electric heating device for resin repair of drainage pipes according to claim 7, characterized in that: The repair airbag (7) is fixedly mounted with guide wheels (20) on its side. There are six guide wheels (20), and the six guide wheels (20) are symmetrically arranged on both sides of the repair airbag (7).

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