High-voltage-resistant explosion-proof electric heating tube

Abstract

The utility model discloses a high-pressure-resistant explosion-proof electric heating tube, which comprises a tube body, an end cover is arranged at the open end of the tube body, an insulating support rod is arranged at one end, facing the tube body, of the end cover, an electric heating wire is arranged on the insulating support rod, and a pressure release valve is connected to the tube body and close to the electric heating wire. The pipe body sequentially comprises a lining layer, a reinforcing layer and a protective layer from inside to outside. The utility model has the advantages that the spring type pressure release valve is arranged on the pipe body close to the electric heating wire, so that when the electric heating wire is heated to heat gas in the pipe body to expand and the pressure is increased, the pressure release valve can be opened in time to discharge redundant gas in the pipe, and the pressure in the pipe is prevented from exceeding the bearing limit; therefore, safety accidents such as breakage and even explosion of the tube body are effectively prevented, the use safety of the electric heating tube is greatly improved, and stable operation of application scenes such as industrial production is guaranteed.

Description

A high-pressure resistant explosion-proof electric heating tube Technical Field

[0001] This utility model belongs to the field of electric heating element technology, specifically relating to a high-pressure resistant explosion-proof electric heating tube. Background Technology

[0002] Electric heating elements are widely used as a key heating element in industrial production and many other fields requiring heating. However, with the continuous advancement of industrial technology, the environmental requirements for electric heating elements are becoming increasingly stringent, and traditional electric heating elements are gradually revealing numerous problems, making it difficult to meet actual production needs.

[0003] In the use of traditional electric heating tubes, the gas inside the tube expands due to the heating wire, which increases the pressure inside the tube. When the pressure exceeds the tube's tolerance limit, it can easily cause the tube to rupture or even explode, posing a significant safety hazard.

[0004] Therefore, there is an urgent need to provide a high-pressure resistant explosion-proof electric heating tube to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this utility model is to provide a high-pressure resistant explosion-proof electric heating tube to solve the technical problem that when the pressure inside the electric heating tube rises and exceeds the tube's withstand limit, it can easily cause the tube to rupture or even explode, leading to safety accidents.

[0006] To solve the above-mentioned technical problems, this utility model provides a high-pressure resistant explosion-proof electric heating tube, comprising: a tube body, an end cap at the open end of the tube body, an insulating support rod at the end of the end cap facing the tube body, an electric heating wire on the insulating support rod, a pressure relief valve connected to the tube body near the electric heating wire, and the tube body comprising, from the inside to the outside, an inner lining layer, a reinforcing layer, and a protective layer.

[0007] As further explained, the inner lining layer is bonded to the reinforcing layer, the reinforcing layer is bonded to the protective layer, and the exposed surfaces of the inner lining layer and the protective layer are all finely polished.

[0008] As further explained, the pressure relief valve is a spring-loaded pressure relief valve, which includes an air inlet and an air outlet. The air inlet is located inside the tube and faces the heating wire, while the air outlet is located outside the tube.

[0009] As further explained, each end of the heating wire is connected to two pins, and one end of each pin passes through the end cap and extends out.

[0010] As further explained, the pin is connected to a sealing block outside the end cover, and the sealing block is fixed to the end cover.

[0011] As further explained, the heating wire has a double helix structure and is tightly wound in a spiral shape around the insulating support rod.

[0012] As further explained, the end cap and the tube body are connected by threads.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By installing a spring-loaded pressure relief valve near the heating wire in the tube, when the heating wire heats up and causes the gas inside the tube to expand and the pressure to rise, the pressure relief valve can open in time to discharge the excess gas in the tube, preventing the pressure inside the tube from exceeding the limit. This effectively prevents safety accidents such as tube rupture or even explosion, greatly improves the safety of electric heating tube use, and ensures stable operation in industrial production and other application scenarios.

[0015] 2. The tube body adopts a composite structure consisting of an inner lining layer, a reinforcing layer, and a protective layer from the inside out. Each layer is bonded to the other. This multi-layer composite structure enhances the overall strength and pressure resistance of the tube body, enabling it to better withstand internal pressure and external forces such as collisions and compressions, further improving the high pressure resistance and explosion-proof performance of the heating element.

[0016] 3. The pins are connected to a sealing block fixed on the end cover, which effectively prevents external dust, moisture and other impurities from entering the tube body through the connection between the pins and the end cover. This avoids damage to components such as the heating wire, extends the service life of the heating tube, and also helps maintain a sealed environment inside the tube, ensuring the normal operation of components such as the pressure relief valve.

[0017] 4. The heating wire adopts a double helix structure and is tightly wound in a spiral shape on the insulating support rod. This structure increases the heating area of ​​the heating wire, improves the heating efficiency, and can transfer heat more quickly and evenly, meeting the requirements of industrial production for heating speed and effect.

[0018] 5. The end cap and the tube body are connected by threads. This connection method is not only convenient for installation and disassembly, facilitating maintenance and repair of the inside of the heating element, but also provides a certain degree of sealing and stability, ensuring a tight fit between the tube body and the end cap and preventing problems such as gas leakage.

[0019] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 is a schematic diagram of a preferred structure of this utility model;

[0023] Figure 2 is a schematic diagram of the composition of the tube body of this utility model.

[0024] In the picture:

[0025] 1. Pipe body, 101. Inner lining layer, 102. Reinforcing layer, 103. Protective layer, 2. End cap, 3. Pressure relief valve, 301. Air inlet, 302. Air outlet, 4. Insulating support rod, 5. Heating wire, 6. Pin, 7. Sealing block. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Referring to Figures 1-2, a high-pressure resistant explosion-proof electric heating tube includes: a tube body 1, an end cap 2 at the open end of the tube body 1, an insulating support rod 4 at the end of the end cap 2 facing the tube body 1, an electric heating wire 5 on the insulating support rod 4, and a pressure relief valve 3 connected to the tube body 1 near the electric heating wire 5. The tube body 1 includes, from the inside out, an inner lining layer 101, a reinforcing layer 102, and a protective layer 103. The electric heating wire 5 is wound around the insulating support rod 4 and generates heat to achieve the heating function after being energized. The pressure relief valve 3 is connected to the tube body 1 near the electric heating wire 5. When the pressure inside the tube rises abnormally, the pressure relief valve 3 can promptly release excess gas and reduce the pressure inside the tube. The tube body 1 adopts a three-layer composite structure of inner lining layer 101, reinforcing layer 102, and protective layer 102, which enhances the performance of the tube body 1 from different levels. The overall structure of this case is reasonably designed, and all components work together to meet basic heating needs. By setting up a pressure relief valve 3 and a multi-layer composite tube structure 1, it effectively solves the safety hazards of traditional electric heating tubes that may rupture or even explode due to increased internal pressure. This significantly improves the safety and reliability of the electric heating tube and enables it to adapt to more demanding operating environments.

[0028] As shown in Figure 2, the inner lining layer 101 is bonded to the reinforcing layer 102, and the reinforcing layer 102 is bonded to the protective layer 103. The exposed surfaces of both the inner lining layer 101 and the protective layer 103 have undergone fine polishing. The inner lining layer 101 is in direct contact with the medium inside the pipe, and its material and performance directly affect its compatibility with the medium. The reinforcing layer 102 provides the main mechanical support, enhancing the pressure resistance of the pipe body 1. The protective layer 103 provides protection, preventing damage to the pipe body from external factors. Fine polishing of the exposed surfaces of the inner lining layer 102 and the protective layer 103 reduces surface roughness, minimizes stress concentration, further improves their pressure resistance, and also improves surface smoothness and flatness. The bonding between the layers ensures the integrity and stability of the pipe body 1 structure, improving its pressure resistance and sealing performance.

[0029] As shown in Figure 1, the pressure relief valve 3 is a spring-loaded pressure relief valve. It includes an inlet 301 and an outlet 302. The inlet 301 is located inside the tube body 1 and faces the heating wire 5, while the outlet 302 is located outside the tube body 1. The spring-loaded pressure relief valve has a simple structure, sensitive operation, and high reliability. It can promptly and effectively discharge excess gas from the tube, preventing excessive pressure and ensuring the safe operation of the heating element. The inlet 301, facing the heating wire 5, allows for more direct sensing of pressure changes caused by the heating wire 5; the outlet 302, located outside the tube body 1, ensures that the discharged gas will not affect other components inside the tube. The optimized placement of the inlet 301 and outlet 302 further improves the working efficiency and safety of the pressure relief valve 3. During operation, when the pressure inside the pipe is normal, the spring force inside the pressure relief valve 3 keeps the valve closed, preventing gas leakage. When the heating wire 5 heats the gas inside the pipe, the pressure increases. When the pressure exceeds the pressure value set by the spring, the spring is compressed, the valve opens, and the gas enters the pressure relief valve 3 from the inlet 301 and is discharged outside the pipe through the outlet 302, thereby reducing the pressure inside the pipe. When the pressure drops to a safe range, the spring returns to its elasticity, and the valve closes again.

[0030] As shown in Figure 1, two pins 6 are connected to both ends of the heating wire 5. One end of each pin 6 passes through the end cap 2 and extends outward. The pins 6 serve as a bridge connecting the heating wire 5 to an external power source. One end is connected to the heating wire 5, and the other end passes through the end cap 2 and extends outward from the tube body 1 to connect to an external circuit, thereby enabling the input of electrical energy and allowing the heating wire 5 to be energized and heated.

[0031] As shown in Figure 1, a sealing block 7 is connected to the outside of the end cap 2 for the pin 6, and the sealing block 7 is fixed to the end cap 2. The sealing block 7, fixed to the end cap 2, seals the gap between the pin 6 and the end cap 2, preventing external dust, moisture, impurities, etc., from entering the tube body 1 through this gap. The sealing block 7 effectively improves the sealing performance of the heating element, avoiding the corrosion and damage of external impurities to components such as the heating wire 5 inside the tube, and reducing safety hazards caused by external factors.

[0032] As shown in Figure 1, the heating wire 5 has a double-helix structure and is tightly wound in a spiral shape around the insulating support rod 4. The double-helix structure is based on a single helix, with two spirals intertwined to form a more complex and compact structure. This structure is then tightly wound in a spiral shape around the insulating support rod 4, increasing the length of the heating wire 5 within a limited space, thereby increasing the heating area. Simultaneously, the tightly wound spiral structure makes the heat distribution more uniform, enabling faster and more efficient heating and improving the heating efficiency of the heating element.

[0033] As shown in Figure 1, the end cap 2 and the tube body 1 are connected by threads. By rotating the end cap 2 or the tube body 1, the threads engage, thus achieving a tight connection between the end cap 2 and the tube body 1. The threaded connection method is simple and convenient to operate, facilitating the installation and removal of the heating element. When maintenance, repair, or replacement of components is required inside the heating element, the end cap 2 can be easily removed. Simultaneously, the threaded connection has a certain degree of self-locking, ensuring a tight and airtight connection between the end cap 2 and the tube body 1, preventing gas leakage, and ensuring the normal operation of the heating element.

[0034] In summary, this invention relates to a high-pressure resistant explosion-proof electric heating tube. The tube body 1 is equipped with an end cap 2, an insulating support rod 4, a heating wire 5, and a pressure relief valve 3. The tube body 1 has a three-layer composite structure with interlayer bonding. The various components work together to effectively improve safety and practicality in terms of pressure relief and explosion protection, structural reinforcement, sealing and dust prevention, efficient heating, and convenient assembly and disassembly, meeting stringent usage requirements.

[0035] All components selected in this application (parts whose specific structures are not described) are general standard parts or parts known to those skilled in the art, and their structures and principles can be obtained by those skilled in the art through technical manuals.

[0036] This knowledge can be obtained through conventional experimental methods.

[0037] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0038] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0039] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A high-pressure resistant explosion-proof electric heating tube, characterized in that, include: The tube body (1) has an end cap (2) at its open end. An insulating support rod (4) is provided on the end of the end cap (2) facing the tube body (1). An electric heating wire (5) is provided on the insulating support rod (4). A pressure relief valve (3) is connected to the tube body (1) near the electric heating wire (5). The tube body (1) includes an inner lining layer (101), a reinforcing layer (102), and a protective layer (103) from the inside to the outside.

2. The high-pressure resistant explosion-proof electric heating tube as described in claim 1, characterized in that, The inner lining layer (101) is bonded to the reinforcing layer (102), and the reinforcing layer (102) is bonded to the protective layer (103). The exposed surfaces of the inner lining layer (101) and the protective layer (103) are both finely polished.

3. The high-pressure resistant explosion-proof electric heating tube as described in claim 1, characterized in that, The pressure relief valve (3) is a spring-loaded pressure relief valve. The pressure relief valve (3) includes an air inlet (301) and an air outlet (302). The air inlet (301) is located inside the tube body (1) and faces the heating wire (5). The air outlet (302) is located outside the tube body (1).

4. The high-pressure resistant explosion-proof electric heating tube as described in claim 1, characterized in that, The heating wire (5) has two pins (6) connected to its two ends respectively, and one end of each pin (6) passes through the end cap (2) and extends out.

5. A high-pressure resistant explosion-proof electric heating tube as described in claim 4, characterized in that, The pin (6) is connected to a sealing block (7) outside the end cover (2), and the sealing block (7) is fixed on the end cover (2).

6. The high-pressure resistant explosion-proof electric heating tube as described in claim 1, characterized in that, The heating wire (5) has a double helix structure and is tightly wound in a spiral shape on the insulating support rod (4).

7. A high-pressure resistant explosion-proof electric heating tube as described in claim 1, characterized in that, The end cap (2) is connected to the tube body (1) by threads.

Images