An integrated heating device and a direct-buried pressure regulating box instrument room

Abstract

This utility model discloses a built-in heating device and a direct-buried pressure regulating box instrument chamber, comprising: a heating tube, which has a heating column and a temperature controller inside; a connecting seat, one end of which is sealed to the heating tube; a sleeve, suitable for fixed installation on the connecting pipe of the instrument chamber, the other end of the connecting seat being detachably installed on the sleeve via a clamping ring; a sealing gasket, disposed between the connecting seat and the sleeve; and a cable, passing through the sleeve and the connecting seat, and electrically connected to the heating column and the temperature controller; the clamping ring is configured such that when it is tightened, it can compress the sealing gasket to achieve sealing and fixation between the connecting seat and the sleeve. This invention solves the problems of poor sealing performance, low thermal efficiency, and inconvenient installation of existing heaters. Through integrated design and multiple sealing structures, it effectively prevents moisture intrusion and achieves efficient and reliable anti-freeze insulation.

Description

Technical Field

[0001] This utility model belongs to the field of gas transmission and distribution technology, and in particular relates to a built-in heating device and a direct-buried pressure regulating box instrument room. Background Technology

[0002] As a key component of urban gas transmission and distribution systems, directly buried pressure regulating boxes typically have their instrument chambers (containing pressure regulators, flow meters, valves, etc.) directly buried underground to save surface space and maintain an aesthetically pleasing appearance. They also feature a sealed, waterproof design, preventing rainwater from entering the instrument chamber. However, in cold seasons or low-temperature environments, moisture contained in the piped gas can easily freeze and accumulate inside the equipment, forming ice blockages. This can cause damage or malfunction of the internal precision instruments and pipes due to freezing, severely impacting the safe and stable operation of the pressure regulating box.

[0003] To prevent the aforementioned problems, existing technologies typically install electric heating devices in the instrument room of buried voltage regulating boxes. Common practices include using externally wrapped heating tape or independently placed heaters. However, these methods have significant drawbacks: First, the heating elements are mostly exposed to the air in the instrument room, resulting in rapid heat loss, low thermal efficiency, and potential electrical safety hazards due to the humid environment. Second, the heater power cord needs to be introduced into the instrument room through a conduit interface, where sealing is crucial but often ineffective, allowing moisture to easily seep in along the cable. This can directly damage the heater itself and, in some cases, flow directly into the instrument room, exacerbating equipment corrosion and freezing risks. Third, existing heating devices often have complex structures, making them inconvenient to install and maintain in the confined space of the instrument room, and they lack effective insulation design, allowing a large amount of heat to be conducted to the outside of the box through the mounting components, resulting in energy waste.

[0004] Therefore, there is an urgent need in this field for an integrated built-in heating device that can effectively solve the problems of sealing, heat insulation and ease of installation, specifically for the instrument room of a directly buried pressure regulating box. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a built-in heating device and a direct-buried pressure regulating box instrument room to solve the problems of poor heater sealing, low thermal efficiency and inconvenient installation in the prior art. Through integrated design and multiple sealing structure, it effectively prevents moisture intrusion and achieves efficient and reliable antifreeze insulation.

[0006] This utility model is implemented as follows: a built-in heating device, characterized in that it includes: a heating tube, which has a heating column and a temperature controller inside; a connecting seat, one end of which is sealed to the heating tube; a sleeve, suitable for fixed installation on a connecting pipe in an instrument compartment, the other end of which is detachably installed on the sleeve via a clamping ring; a sealing gasket, disposed between the connecting seat and the sleeve; a cable, passing through the sleeve and the connecting seat, and electrically connected to the heating column and the temperature controller; the clamping ring is configured such that when it is tightened, it can press the sealing gasket to achieve sealing and fixation between the connecting seat and the sleeve.

[0007] Further preferably, the sleeve is further provided with a clamping seat and a sealing ring, the sealing ring and the clamping seat being sleeved on the cable; the clamping seat is configured to clamp the sealing ring when it is tightened, so as to achieve sealing and fixing between the cable and the sleeve.

[0008] More preferably, the connector is further provided with a sealing ring inside, which is used to achieve a seal between the connector and the cable.

[0009] More preferably, the connecting seat and the heating tube are sealed by a sealing ring.

[0010] More preferably, the outer surface of the heating tube is provided with fins to increase the heat dissipation area.

[0011] More preferably, the end of the heating tube away from the connector is provided with a protective cap, and the protective cap and the heating tube are sealed by a sealing ring.

[0012] More preferably, the protective cap has a wiring terminal inside, and the cable, the temperature controller and the heating column cable are all connected to the wiring terminal.

[0013] More preferably, the temperature controller is connected in series with the heating column, and the temperature controller is configured to switch the circuit on and off according to the temperature of the heating tube to control the operation and stop of the heating column.

[0014] More preferably, the connector is made of heat-insulating material.

[0015] More preferably, the connecting pipe is equipped with the aforementioned built-in heating device; a cable conduit is sleeved on the outside of the connecting pipe, and the cable of the built-in heating device passes through the cable conduit.

[0016] The advantages and technical effects of this utility model are as follows:

[0017] This utility model integrates heating, sealing, insulation, and intelligent control functions through an integrated built-in design, resulting in significant overall technical benefits. Its core lies in a multi-layered sealing structure: dynamic sealing of the cable is achieved by compressing the sealing ring 9 with the clamping seat 10; the interface between the device and the instrument chamber is sealed by compressing the sealing gasket with the clamping ring 3; and a sealing ring is installed inside the connecting seat to provide redundant protection, completely eliminating the risk of moisture seeping into the installation interface and cables in the buried environment, resulting in a high level of protection. In terms of thermal efficiency, the low thermal conductivity connecting seat 2 effectively blocks thermal bridges, reducing heat loss to the outside of the chamber. Combined with the fins 17 on the outer wall of the heating tube 15, the heat dissipation area is significantly increased, allowing heat to be concentrated and efficiently applied to the instrument chamber, significantly reducing energy consumption. Structurally, the modular design simplifies installation and maintenance, and the centralized arrangement of wiring terminals ensures safe and reliable electrical connections. The intelligent temperature controller is connected in series with the heating column, directly sensing the tube temperature and switching the circuit on and off, achieving fully automatic and precise temperature control cycles with stable and reliable operation. Ultimately, it achieves safe, efficient, long-lasting, and automated anti-freeze insulation in harsh buried environments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the built-in heating device of this utility model.

[0019] Figure 2 This is a schematic diagram of the installation structure of the instrument room with a built-in heating device and a direct-buried pressure regulating box of this utility model.

[0020] 1: Sealing ring; 2: Connecting seat; 3: Compression ring; 4: Sealing gasket; 5: Cable; 6: Cable conduit; 7: Connecting pipe; 8: Sleeve; 9: Sealing ring; 10: Compression seat;

[0021] 11: Sealing ring; 12: Terminal block; 13: Protective cap; 14: Sealing ring; 15: Heating tube; 16: Heating column; 17: Fin; 18: Thermostat; 19: Direct-buried pressure regulating box instrument room; 20: Pressure regulating equipment. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0023] Please see Figure 1An internal heating device includes: a heating tube 15, which has a heating column 16 and a thermostat 18 inside; a connecting seat 2, one end of which is sealed to the heating tube 15; a sleeve 8, adapted to be fixedly installed on a connecting pipe 7 in an instrument compartment, the other end of the connecting seat 2 being detachably installed on the sleeve 8 via a clamping ring 3; a sealing gasket 4, disposed between the connecting seat 2 and the sleeve 8; a cable 5, passing through the sleeve 8 and the connecting seat 2, and electrically connected to the heating column 16 and the thermostat 18; the clamping ring 3 is configured such that when it is tightened, it can press the sealing gasket 4 to achieve sealing and fixation between the connecting seat 2 and the sleeve 8.

[0024] Technical Effects: This design constitutes the core of this utility model's compact integrated structure. The mechanical pressure generated by tightening the clamping ring 3 tightly presses the connecting seat 2 against the sealing gasket 4, achieving the main sealing interface between the entire device and the reserved connecting pipe 7, effectively preventing external moisture and gas from intruding into the instrument chamber from the installation interface. Simultaneously, this structure enables rapid installation and fixation, simplifying the on-site construction process and ensuring the stability of the device. The internally integrated heating tube 15 directly applies heat to the internal space of the instrument chamber, improving thermal efficiency.

[0025] More preferably, the sleeve 8 is further provided with a clamping seat 10 and a sealing ring 9 inside, the sealing ring 9 and the clamping seat 10 being sleeved on the cable 5; the clamping seat 10 is configured to clamp the sealing ring 9 when it is tightened, so as to achieve sealing and fixing between the cable 5 and the sleeve 8.

[0026] Technical Effects: This solution provides a dynamic sealing solution for the power cable 5. Tightening the clamping seat 10 radially compresses the sealing ring 9, causing it to simultaneously grip the outer wall of the cable 5 and fill the inner wall space of the sleeve 8, forming a crucial cable sealing barrier. This design effectively prevents moisture from seeping into the device and instrument compartment due to the failure of the seal of the external cable conduit 6, greatly improving the system's water-proof reliability. Simultaneously, the compressed sealing ring 9 firmly clamps the cable 5, facilitating on-site cable threading and preventing the cable from loosening due to accidental pulling.

[0027] More preferably, the connector 2 is further provided with a sealing ring 11 inside, which is used to achieve a seal between the connector 2 and the cable 5.

[0028] Technical Benefits: This solution adds an additional independent static sealing ring 11 inside the connector 2, specifically designed to seal the minute gap between the cable 5 and the connector 2. Together with the sealing ring 9 inside the sleeve 8, it forms a double-seal guarantee. Even if the sealing ring 9 becomes loose due to long-term use or cable movement, this seal effectively prevents moisture from continuing to penetrate the heating tube 15 along the cable 5, greatly enhancing the safety redundancy and long-term reliability of the entire system.

[0029] More preferably, the connecting seat 2 and the heating tube 15 are sealed by a sealing ring 1.

[0030] Technical effect: This solution achieves a reliable static seal at the connection between the connector 2 and the heating tube 15 by setting a sealing ring 1. It ensures the sealing between the heating tube 15, the core heating component, and the external mounting structure, preventing heat leakage from this point and blocking external corrosive gases or moisture from entering through this interface and damaging the internal electrical components, thus ensuring the airtightness and long service life of the heater body.

[0031] More preferably, the outer surface of the heating tube 15 is provided with fins 17 for increasing the heat dissipation area.

[0032] Technical benefits: This solution significantly increases the contact area between the heating tube 15 and the air inside the instrument room by processing fins 17 on its outer wall. This effectively improves heat exchange efficiency, allowing heat to be dissipated into the surrounding environment more quickly and evenly, avoiding localized heat accumulation, and achieving rapid and uniform heating and insulation of the instrument room with lower energy consumption, thus saving energy and reducing consumption.

[0033] More preferably, a protective cap 13 is provided at the end of the heating tube 15 away from the connecting seat 2, and the protective cap 13 and the heating tube 15 are sealed by a sealing ring 14.

[0034] Technical benefits: This solution provides a safe and reliable sealed cover for the tail of the heating tube 15 by adding a protective cap 13 and sealing it with a sealing ring 14. It not only prevents dust and moisture from entering the internal circuit from the tail, but the sealed cavity it forms also provides a dry and safe working environment for the internal wiring terminals 12, facilitating centralized arrangement of electrical connections and subsequent maintenance, while improving the overall protection level of the structure.

[0035] More preferably, the protective cap 13 has a wiring terminal 12 inside, and the cables of the cable 5, the thermostat 18 and the heating column 16 are all connected to the wiring terminal 12.

[0036] Technical benefits: This solution centralizes all electrical connection points on the terminal blocks 12 inside the protective cap 13, with the terminal blocks connected to an external power source via cables. This junction box design makes the internal wiring clear and standardized, greatly facilitating wiring operations during production and assembly, as well as inspection and replacement during future maintenance. It avoids the risks of poor contact and short circuits that may result from directly twisting and hinged wire ends, thus improving the reliability and safety of electrical connections.

[0037] More preferably, the thermostat 18 is connected in series with the heating column 16, and the thermostat 18 is configured to switch the circuit on and off according to the tube temperature of the heating tube 15 to control the operation and stop of the heating column 16.

[0038] Technical Benefits: This solution employs a simple circuit with a thermostat 18 connected in series with the heating element 16 for automatic temperature control. The thermostat 18 directly senses the wall temperature of the heating element 15, automatically cutting off the power to the entire circuit when the temperature reaches the set value and automatically reconnecting it when the temperature falls below the set value. This direct control of the main circuit eliminates the need for a complex control unit, resulting in a simple structure, low cost, and reliable operation. It achieves efficient automatic constant temperature control, avoiding energy waste and the risk of equipment overheating.

[0039] Further preferably, the connecting seat 2 is made of thermal insulation material. Technical effect: This solution uses a thermal insulation material with low thermal conductivity, such as ceramic, polytetrafluoroethylene, or polyoxymethylene, to manufacture the connecting seat 2; a thermal bridge is established between the heating pipe 15 and the external mounting sleeve 8. This significantly reduces heat loss from the high-temperature heating pipe 15 to the low-temperature instrument chamber wall (connecting pipe 7), more effectively confining heat to circulate within the instrument chamber, thereby greatly improving the thermal efficiency of the entire heating device and reducing operating energy consumption.

[0040] Please see Figure 2 This utility model also relates to a direct-buried pressure regulating box instrument room 19, including an instrument room body and a connecting pipe 7 reserved thereon, wherein an internal heating device is installed on the connecting pipe 7; a cable pipe 6 is sleeved on the outside of the connecting pipe 7, and the cable 5 of the internal heating device passes through the cable pipe 6.

[0041] Working Principle: When the instrument room of this directly buried voltage regulating box is in operation, the built-in heating device is fixed to the wall of the instrument room via connecting pipe 7. Power is introduced through the buried protective cable pipe 6 and connected to the device via cable 5. After the current flows through the terminal block 12, it powers the series-connected heating column 16 and temperature controller 18. The heating column 16 generates heat when energized, and the heat is efficiently dissipated into the air of the instrument room through the heating tube 15 and its fins 17, preventing ice blockage in the voltage regulating equipment 20. The temperature controller 18 monitors the temperature of the heating tube 15 in real time. When the temperature rises to the set upper limit, its internal contacts open, automatically cutting off the entire circuit, and the heating column 16 stops heating; when the temperature drops to the set lower limit, the contacts of the temperature controller 18 reset and close, the circuit is restored, and the heating column 16 starts heating again. This cycle maintains the temperature within the set range. The device's multiple sealing structures (such as sealing gasket 4, sealing ring 9, sealing ring 11, etc.) work together to ensure that even if water enters the external cable conduit 6 or the soil is damp, moisture cannot penetrate into the instrument room and heater body through the installation interface or cable, thus ensuring the long-term safe and reliable operation of the pressure regulating box in harsh underground environments.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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 built-in heating device, characterized in that include: Heating tube (15), which has a heating column (16) and a thermostat (18) inside; Connecting seat (2), one end of which is sealed to the heating tube (15); A sleeve (8) is suitable for fixed installation on a connecting pipe (7) in the instrument room, and the other end of the connecting seat (2) is detachably installed on the sleeve (8) by a clamping ring (3); A sealing gasket (4) is disposed between the connecting seat (2) and the sleeve (8); The cable (5) is inserted inside the sleeve (8) and the connector (2) and is electrically connected to the heating column (16) and the temperature controller (18); The clamping ring (3) is configured to clamp the sealing gasket (4) when it is tightened, so as to achieve sealing and fixation between the connecting seat (2) and the sleeve (8).

2. The built-in heating device according to claim 1, characterized in that, The sleeve (8) also has the following features inside: A clamping seat (10) and a sealing ring (9) are fitted onto the cable (5); The clamping seat (10) is configured to clamp the sealing ring (9) when tightened, thereby achieving sealing and fixation between the cable (5) and the sleeve (8).

3. A built-in heating device according to claim 1 or 2, characterized in that The connector (2) is also provided with a sealing ring (11) inside, which is used to achieve a seal between the connector (2) and the cable (5).

4. The built-in heating device of claim 1, wherein The connection seat (2) and the heating tube (15) are sealed by a sealing ring (1).

5. The built-in heating device of claim 1, wherein The outer surface of the heating tube (15) is provided with fins (17) to increase the heat dissipation area.

6. The built-in heating device of claim 1, wherein The heating tube (15) is provided with a protective cap (13) at the end away from the connecting seat (2), and the protective cap (13) and the heating tube (15) are sealed by a sealing ring (14).

7. The built-in heating device according to claim 6, characterized in that The protective cap (13) is provided with a wiring terminal (12), and the cables of the cable (5), the thermostat (18) and the heating column (16) are all connected to the wiring terminal (12).

8. The built-in heating device of claim 1, wherein The thermostat (18) is connected in series with the heating column (16). The thermostat (18) is configured to switch the circuit on and off according to the tube temperature of the heating tube (15) to control the operation and stop of the heating column (16).

9. The built-in heating device of claim 1, wherein The connector (2) is made of heat-insulating material.

10. A direct-buried pressure regulating box instrument compartment, comprising an instrument compartment body and a connecting pipe (7) pre-installed thereon, characterized in that, The connecting pipe (7) is equipped with a built-in heating device as described in any one of claims 1-9; a cable pipe (6) is sleeved on the outside of the connecting pipe (7), and the cable (5) of the built-in heating device passes through the cable pipe (6).

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