Leakage monitoring and protecting device for heat conduction oil pipe

Abstract

The utility model discloses a leakage monitoring and protecting device for a heat-conducting oil pipe, which comprises an upper protecting pipe unit and a lower protecting pipe unit which are half-pipe-shaped, arc-shaped surfaces are arranged on two sides of the upper protecting pipe unit and the lower protecting pipe unit, and pipe orifices are arranged on the arc-shaped surfaces; leakage monitoring devices are arranged in the upper protection pipe unit and the lower protection pipe unit. Leakage accidents can be found in time; leakage is limited in a certain space, so that high-temperature damage to working and inspection personnel is avoided.

Description

Technical Field

[0001] The utility model relates to a leakage monitoring and protection device for a heat-conducting oil pipe, belonging to the technical field of chemical industry. Background Art

[0002] Polymer pelletizing systems often utilize thermal oil systems, which are located in separate, enclosed workshops. These systems inevitably require flanges, valves, and metal hoses, which are weak links compared to metal pipes and prone to leakage.

[0003] Once the high-temperature heat transfer oil in the closed pelletizing plant leaks, there will be safety problems: it is easy to cause fire and personal injury; in addition, the volatilization and diffusion of the high-temperature heat transfer oil after leakage will bring difficulties to the explosion-proof requirements of the electrical equipment in the closed plant. Utility Model Content

[0004] The purpose of this utility model is to provide a leakage monitoring and protection device for heat transfer oil pipes to address the above-mentioned problems, which can detect leakage accidents in time and limit the leakage to a certain space to avoid high temperature injuries to working and inspecting personnel.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A leakage monitoring and protection device for a heat transfer oil pipe comprises a semi-pipe-shaped upper protection pipe unit and a lower protection pipe unit. Both sides of the upper protection pipe unit and the lower protection pipe unit are provided with arcuate surfaces, and pipe openings are opened on the arcuate surfaces. A leakage monitoring device is provided in the upper protection pipe unit and the lower protection pipe unit.

[0007] Optionally, the leakage monitoring device includes a flame monitor provided at the top of the upper protection tube unit and / or a temperature transmitter provided at the bottom of the lower protection tube unit.

[0008] Optionally, it also includes a thermal oil metal hose, the two ends of which are connected to the thermal oil pipeline flange; the upper protective pipe unit and the lower protective pipe unit are respectively arranged above and below the thermal oil metal hose, and the flange neck of the thermal oil pipeline flange passes through the pipe mouth.

[0009] Optionally, heat-resistant insulating putty is used to seal the pipe opening and the flange neck.

[0010] Optionally, there is a gap between the upper protection tube unit and the lower protection tube unit.

[0011] Optionally, the upper protection tube unit and the lower protection tube unit are fastened and fixed by a clamp.

[0012] Optionally, radially arranged support ribs are provided inside the lower protective pipe unit.

[0013] Optionally, a heat insulating pad is provided between the support rib and the heat-conducting oil metal hose.

[0014] Optionally, the lower protective tube unit is provided with supporting legs on the outside.

[0015] Optionally, the leakage monitoring device is connected to a control system.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] 1. The utility model provides a leakage monitoring and protection device for thermal oil pipes. A large metal pipe is cut along its diameter. Flame detectors and temperature transmitters are installed in the upper and lower halves of the pipe. These are surrounded by metal hoses or pipe flanges, which are weak links in the thermal oil pipeline. This allows for thermal oil leakage monitoring and personal protection. Combined with other measures, this device can eliminate the explosion hazard in closed factory buildings and reduce the explosion-proof requirements for electrical equipment within the factory building.

[0018] 2. The utility model provides a leakage monitoring and protection device for heat transfer oil pipes, which eliminates the explosion hazard environment of the closed factory building through interlocking means according to the leakage monitoring results, reduces the explosion-proof requirements of electrical equipment in the factory building, and saves equipment investment.

[0019] 3. The leakage monitoring and protection device for heat transfer oil pipes provided by this utility model is widely available in materials, easy to manufacture, and convenient to implement. It has high practicality, provides safety protection functions, and is economically efficient. Therefore, it has high promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Figure 2 It is a structural diagram of the lower protection pipe unit.

[0022] Figure 3 It is a structural diagram of the upper protective pipe unit.

[0023] Markings in the figure: 1-thermal oil pipe flange, 2-thermal oil metal hose, 3-lower protective pipe unit, 4-upper protective pipe unit, 5-temperature transmitter, 6-flame detector, 7-support rib, 8-support leg, 9-clamp. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings.

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] A leakage monitoring and protection device for a heat transfer oil pipe, such as Figure 1-3 As shown, it includes a semi-tube-type upper protection pipe unit 4 and a lower protection pipe unit 3, and arc-shaped surfaces are provided on both sides of the upper protection pipe unit 4 and the lower protection pipe unit 3, and pipe openings are opened on the arc-shaped surfaces; leakage monitoring devices are provided in the upper protection pipe unit 4 and the lower protection pipe unit 3.

[0027] Specifically, the upper protective tube unit 4 and the lower protective tube unit 3 together form a relatively comprehensive protection system, which can effectively protect both the upper and lower parts of the oil pipe. The semi-tube structure facilitates installation and maintenance operations on the oil pipe. The curved surface design increases the strength and stability of the protective tube, which can better withstand external pressure and also provides protection from the side of the protective tube. The built-in leakage monitoring device can promptly detect small leaks in the oil pipe and prevent the leak from expanding. While ensuring the safe operation of the thermal oil pipe, it also provides a convenient maintenance and monitoring method. Optionally, insulation material can be added to the outside of the upper protective tube unit 4 and the lower protective tube unit 3 as needed. The protective tube is not limited to a straight line. It can be cut according to the direction of the thermal oil pipeline and then combined and welded into a broken line. The protective tube is not limited to being horizontal and of the same diameter. It can be tilted, expanded or reduced as needed to move the low and high points of the protective tube to a position convenient for the installation of the temperature transmitter 5 and the flame detector 6. For valve protection, the diameter of the protective tube can be appropriately increased to surround the valve body; a circular hole is opened in the upper protective tube unit 4 to allow the valve stem to pass through; the protective tube can be tilted or expanded as needed, so that the high point is staggered from the valve stem position, the low point is staggered from the protruding part of the valve body, and the protective tube as a whole is not too large.

[0028] As another specific embodiment, the leakage monitoring device includes a flame monitor provided at the top of the upper protective tube unit 4 and / or a temperature transmitter 5 provided at the bottom of the lower protective tube unit 3. The flame monitor can monitor in real time whether there is a flame generated near the thermal oil pipe; the temperature transmitter 5 can monitor the temperature change of the oil pipe in real time, and can prevent damage or leakage of the oil pipe due to overheating. The combined use of the flame monitor and the temperature transmitter 5 provides a double safety guarantee for the thermal oil pipe, which can not only monitor leaks, but also monitor potential fire risks. The number of temperature transmitters 5 and flame detectors 6 in each protective space is not limited to one set, and can be increased as needed at different low points and high points.

[0029] As another specific embodiment, it also includes a thermal oil metal hose 2, and the two ends of the thermal oil metal hose 2 are connected to the thermal oil pipeline flange 1; the upper protective pipe unit 4 and the lower protective pipe unit 3 are respectively arranged above and below the thermal oil metal hose 2, and the flange neck of the thermal oil pipeline flange 1 passes through the pipe opening.

[0030] Another specific embodiment includes a thermal oil metal hose 2, each end of which is connected to a thermal oil pipeline flange 1; an upper protective tube unit 4 and a lower protective tube unit 3 are respectively disposed above and below the thermal oil metal hose 2, with the flange neck of the thermal oil pipeline flange 1 passing through the nozzle. This system surrounds vulnerable points in thermal oil pipelines, such as metal hoses or pipeline flanges, to monitor thermal oil leaks and protect personnel. Specifically, the flange neck outer diameter do and the flange surface outer diameter df of the thermal oil pipeline flange 1, and the inner diameters Di of the upper and lower protective tube units 4 and 3 are required to be greater than df. The hemispherical tops of the caps of the two protective tube halves are cut out to a diameter of (do + 4) mm to form nozzles. After the upper and lower protective tube halves are spliced ​​together, a circular hole with a diameter of (do + 4) mm in the caps is formed to allow the thermal oil metal pipe / flange neck to pass through, with (do + 4) being required to be less than df.

[0031] In another specific embodiment, heat-resistant insulating putty is used to seal the pipe opening and flange neck. This insulating putty can fill tiny gaps, ensuring a tight seal between the protective pipe and flange neck, and preventing oil leakage. The heat-resistant insulating putty can withstand high temperatures and will not soften or lose its adhesive strength due to temperature increases.

[0032] In another specific embodiment, a gap is provided between the upper and lower protective tube units 4 and 3. Air can enter the protective tubes through the gap, balancing the pressure and preventing deformation or damage to the protective tubes caused by pressure differences. This gap also helps dissipate heat, maintaining the oil pipe temperature within a reasonable range.

[0033] As another specific embodiment, the upper protection pipe unit 4 and the lower protection pipe unit 3 are connected by a clamp 9. The protection pipe units connected by the clamp 9 can be easily opened, which is convenient for maintenance operations and saves time and labor.

[0034] As another specific embodiment, radially arranged support ribs 7 are provided inside the lower protective pipe unit 3. The support ribs 7 can fix the position of the metal hose and keep it on the centerline of the protective device, thereby ensuring uniform flow of fluid in the pipe and avoiding increased flow resistance or localized wear caused by deviation.

[0035] As another specific embodiment, a thermal insulation pad is provided between the support rib 7 and the thermal oil metal hose 2. This pad blocks heat transfer between the metal hose and the support rib 7, preventing the high temperature of the metal hose from directly transferring to the support rib 7. This protects the support rib 7 from high temperatures and maintains its structural and performance stability. Furthermore, the pad helps maintain the shape and stability of the metal hose, preventing deformation caused by the pressure of the support rib 7.

[0036] As another specific embodiment, the lower protection pipe unit 3 is provided with a support leg 8 on its exterior. The support leg 8 provides a solid support point for the protection pipe, ensuring that the entire protection device remains stable during operation and will not move due to external force or vibration.

[0037] In another specific embodiment, the leakage monitoring device is connected to a control system. Interlocks can be configured based on the leakage monitoring device: the interlock shuts off the thermal oil supply and return lines in the factory to reduce the pressure and leakage of the thermal oil; the interlock activates the emergency blower to dilute the concentration of the vapor-phase thermal oil in the air within the factory to below 10% of the lower explosion limit, eliminating the explosive atmosphere within the enclosed factory and reducing the explosion-proof rating of the electrical equipment within the factory.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The present invention extends to any new features or any new combinations disclosed in this specification, and any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that detailed technical features not disclosed in this embodiment, such as specific structures and connection methods, can be obtained by those skilled in the art from the prior art, and the present disclosed embodiment does not specifically limit them.

Claims

1. A leakage monitoring and protection device for a thermal oil pipe, characterized by: The invention comprises a semi-pipe-type upper protective pipe unit (4) and a lower protective pipe unit (3), wherein arc-shaped surfaces are provided on both sides of the upper protective pipe unit (4) and the lower protective pipe unit (3), and pipe openings are provided on the arc-shaped surfaces; and leakage monitoring devices are provided in the upper protective pipe unit (4) and the lower protective pipe unit (3).

2. The leakage monitoring and protection device for a thermal oil pipe according to claim 1, characterized in that: The leakage monitoring device comprises a flame monitor arranged at the top of the upper protection tube unit (4) and / or a temperature transmitter (5) arranged at the bottom of the lower protection tube unit (3).

3. The leakage monitoring and protection device for a thermal oil pipe according to claim 1, characterized in that: It also includes a heat-conducting oil metal hose (2), the two ends of which are connected to the heat-conducting oil pipeline flange (1); the upper protective pipe unit (4) and the lower protective pipe unit (3) are respectively arranged above and below the heat-conducting oil metal hose (2), and the flange neck of the heat-conducting oil pipeline flange (1) passes through the pipe opening.

4. The leakage monitoring and protection device for a thermal oil pipe according to claim 3, characterized in that: Heat-resistant insulating putty is sealed between the pipe opening and the flange neck.

5. The leakage monitoring and protection device for a thermal oil pipe according to claim 1 or 3, characterized in that: There is a gap between the upper protection pipe unit (4) and the lower protection pipe unit (3).

6. The leakage monitoring and protection device for a thermal oil pipe according to claim 1 or 3, characterized in that: The upper protection pipe unit (4) and the lower protection pipe unit (3) are connected via a clamp (9).

7. The leakage monitoring and protection device for a thermal oil pipe according to claim 1 or 3, characterized in that: The lower protective tube unit (3) is provided with radially arranged support ribs (7) inside.

8. The leakage monitoring and protection device for a thermal oil pipe according to claim 7, characterized in that: A heat insulating pad is provided between the supporting rib (7) and the heat-conducting oil metal hose (2).

9. The leakage monitoring and protection device for a thermal oil pipe according to claim 1 or 3, characterized in that: Support legs (8) are provided on the outside of the lower protective pipe unit (3).

10. The leakage monitoring and protection device for a thermal oil pipe according to claim 1 or 3, characterized in that: The leakage monitoring device is connected to a control system.

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