Explosion-proof electric heating tube

Abstract

The utility model relates to an explosion-proof electric heating tube, which comprises an electric heating tube, an explosion-proof junction box, a flange cover plate and a sealing gasket, the electric heating tube is composed of a spiral electric heating wire, magnesium oxide powder, a metal protective tube and sealant, the explosion-proof junction box is composed of a cover plate, a binding post, an insulator and the sealing gasket, and the electric heating tube and the explosion-proof junction box are fixed on two sides of the flange cover plate. The flange cover plate is connected and fixed to the drainer through the drainer cylinder connecting flange, and the flange cover plate is fastened to the drainer cylinder connecting flange through screws and bolts. The explosion-proof electric heating tube is used for heat preservation of a gas drainer in winter, has the advantages of being safe, reliable, convenient to disassemble and maintain and low in cost, and is remarkable in heating, moisture-proof and corrosion-resistant performance.

Description

Technical Field

[0001] This patent application belongs to the technical field of electric heating equipment, and more specifically, relates to an explosion-proof electric heating tube. Background Art

[0002] Gas drainers are explosion-proof areas, and the condensed water contains a lot of impurities, which directly corrode the wall of the electric heating tube. Therefore, the electric heating tubes used in gas drainers have high explosion-proof and anti-corrosion requirements. In actual production, some electric heating tubes do not have explosion-proof functions, or have poor anti-corrosion and moisture-proof properties, which poses safety hazards in actual use. At the same time, the installation is complicated, maintenance is inconvenient, and the use occasions are limited.

[0003] Therefore, a new type of explosion-proof electric heating tube is needed, which has better overall performance and explosion-proof, anti-corrosion and moisture-proof functions, and has the characteristics of simple installation and convenient maintenance. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an explosion-proof electric heating pipe, which is placed in the condensed water of the drainer cylinder, and bolted to the drainer flange through the bolt eyes on the flange cover, so that the explosion-proof electric heating pipe is fixed to the drainer, and the explosion-proof junction box is located above the drainer cylinder for easy wiring. The electric heating pipe has the advantages of explosion-proof, corrosion-proof and moisture-proof, has a long service life, good heating effect, is easy to disassemble and repair, and effectively solves the above-mentioned problems existing in the background technology.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is:

[0006] An explosion-proof electric heating pipe, including an explosion-proof junction box, an electric heating pipe, and a flange cover. The flange cover is fastened to the flange above the drainer cylinder by bolts and fixed to the drainer. The explosion-proof junction box is located on the upper side of the flange cover. After installation, it is above the drainer cylinder. It includes a cover, fastening screws, sealing gaskets, wiring port nuts, terminal posts, and insulators. It is used for wiring the electric heating pipe and has an explosion-proof function. The electric heating pipe is located below the flange cover. After installation, it is inside the drainer cylinder and placed in condensed water. It includes a metal protective tube, a heating wire, a sealant, and magnesium oxide powder. It has the characteristics of corrosion resistance, moisture resistance, and high thermal conductivity.

[0007] The flange cover is fastened to the connecting flange on the drain cylinder by bolts, and the electric heating tube is placed in the condensed water in the drain cylinder. The junction box cover is fastened to the upper flange of the junction box by fastening screws; the heating part of the electric heating tube is immersed below the water level of the drain cylinder to heat the water seal in the drain;

[0008] The electric heating tube includes a metal protective tube installed under the flange cover, an electric heating wire located in the metal protective tube and connected to the bottom of the flange cover, a sealant filled at the pipe mouth of the metal protective tube, and a heat-conductive insulating material filled in the metal protective tube. The insulator is externally arranged at the bottom of the terminal and extends into the metal protective tube. The electric heating wire passes through the insulator and is electrically connected to the terminal.

[0009] The flange cover plate is a steel flange, and its size matches the connecting flange above the drainer.

[0010] Each connection part of the explosion-proof junction box is provided with a sealing pad and can be reliably fastened and sealed.

[0011] The wire threading hole nut of the explosion-proof junction box is fastened at the wire threading hole by means of threads.

[0012] The heating part of the electric heating tube is placed in the condensed water of the drainer. The length of the electric heating tube must match the height of the drainer cylinder, and the length of the heating part must match the height of the water seal.

[0013] The metal protective tube of the electric heating tube is made of high-quality seamless stainless steel pipe.

[0014] Fill the joint between the electric heating tube and the flange cover with sealant and the pipe mouth.

[0015] The electric heating tube is filled with high-quality magnesium oxide powder.

[0016] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are:

[0017] This device fixes the explosion-proof electric heating pipe to the drainer connection flange through the flange cover. The explosion-proof junction box is located above the drainer for easy wiring. Each connection is equipped with a sealing gasket, which is tightly sealed and has good explosion-proof performance. At the same time, the sealant filled on the upper part of the metal protective tube of the electric heating pipe can also achieve a good sealing effect.

[0018] The electric heating tube is located in the drainer cylinder, and the heating part is immersed in the condensed water to avoid dry burning. It is filled with magnesium oxide powder, which has good thermal conductivity and good heating effect.

[0019] The metal protective tube is made of seamless stainless steel with good corrosion resistance; the electric heating pipe mouth is filled with sealant, which has good moisture-proof effect.

[0020] The device is simple to manufacture and install, has low cost, is easy to disassemble and maintain, and can be installed online without affecting the normal use of the drainer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the installation of the utility model;

[0023] In the figure: explosion-proof junction box 1, flange cover 2, electric heating tube 3, junction box cover 4, fastening screws 5, sealing gasket 6, terminal post 7, nut 8, insulator 9, sealant 10, magnesium oxide powder 11, heating wire 12, metal protective tube 13, junction box upper flange 14. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the embodiments.

[0025] An explosion-proof electric heating tube, such as Figure 1 , including an explosion-proof junction box 1, a flange cover plate 2, and an electric heating tube 3. The explosion-proof junction box 1 and the electric heating tube 3 are respectively located on both sides of the flange cover plate 2 and are connected to the flange cover plate 2. The explosion-proof junction box 1 is placed on the non-waterline side above the flange cover plate 2, and the electric heating tube 3 is placed on the waterline side below the flange cover plate 2.

[0026] A junction box cover 4 is provided at the upper end of the explosion-proof junction box 1 away from the electric heating tube 3, and a fastening screw 5 is provided on the junction box cover 4; a terminal post 7 and an insulator 9 are provided inside the explosion-proof junction box 1, and an explosion-proof cable wiring port for the power line to pass through is provided on the outside. The power line passes through the explosion-proof cable wiring port and is connected and fixed to the terminal post 7.

[0027] The flange cover plate 2 is fastened to the connection flange above the drain cylinder by bolts, and the electric heating tube 3 is placed in the condensed water in the drain cylinder. The junction box cover plate 4 is also fastened to the junction box upper flange 14 by fastening screws 5. The heating part of the electric heating tube 3 is immersed below the water level of the drain cylinder to heat the water seal in the drain;

[0028] The electric heating tube 3 includes a metal protective tube 13 installed under the flange cover 2, a heating wire 12 located in the metal protective tube 13 and connected to the bottom of the flange cover 2, a sealant 10 filled at the pipe mouth of the metal protective tube 13, and a heat-conducting insulating material filled in the metal protective tube 13. The insulator 9 is externally arranged at the bottom of the terminal 7 and extends into the metal protective tube 13. The heating wire 12 passes through the insulator 9 and is electrically connected to the terminal 7, that is, the insulator 9 wraps around the part where the heating wire 12 is electrically connected to the terminal 7, thereby playing a safety role of insulation and protection.

[0029] A threaded joint is provided at the explosion-proof cable connection port, a nut 8 is installed at the threaded joint, and the explosion-proof cable connection port is located in the middle of the outer side of the explosion-proof junction box 1 .

[0030] The flange cover plate 2 is made of carbon steel, and its size matches the connection flange of the drainer; the connection between the junction box cover plate 4, the nut 8, and the flange cover plate 2 is provided with a sealing gasket 6, which is tightly sealed and has good explosion-proof performance. The sealing gasket 6 is a rubber gasket, a silicone gasket, or a PTFE gasket.

[0031] The length of the electric heating tube 3 matches the cylinder of the drainer, and the diameter matches the inner diameter of the connecting flange of the drainer.

[0032] The electric heating tube 3 is a seamless stainless steel tube, the heat-conducting insulating material is magnesium oxide powder 11, and the fastening screw 5 is a moisture-proof screw.

[0033] The following example illustrates this.

[0034] exist Figure 1 The explosion-proof electric heating tube of the present invention comprises an explosion-proof junction box 1, a flange cover plate 2, and an electric heating tube 3. The explosion-proof junction box 1 and the electric heating tube 3 are connected to the flange cover plate 2 on both sides thereof, respectively. The explosion-proof junction box 1 is placed on the non-waterline side above the flange cover plate 2, and the electric heating tube 3 is placed on the waterline side below the flange cover plate 2. The flange cover plate 2 is connected to the drain (combined with Figure 2 ) and fix the electric heating pipe 3 on the drainer. The heating part of the electric heating pipe 3 is placed in the condensed water of the drainer. The length of the electric heating pipe 3 should match the height of the drainer cylinder, and the length of the heating part should match the height of the water seal. During operation, the electric heating pipe 3 is located below the flange cover 2 and inside the drainer cylinder. The connection of the flange cover 2 is filled with a sealing rubber pad 6 to effectively prevent moisture.

[0035] Each connection part of the explosion-proof junction box 1 is provided with a sealing pad 6, which can play a role of reliable fastening and sealing.

[0036] The flange cover plate 2 is made of carbon steel or other steel flanges, and its size matches the connecting flange above the drainer. A sealing gasket 6 is added between the flange cover plate 2 and the connecting flange of the drainer, and is fixed by tightening screws 5.

[0037] The electric heating tube 3 and the metal protective tube 13 are made of high-quality seamless stainless steel pipes, which are corrosion-resistant and can be used in condensed water in gas pipelines. The length of the electric heating tube 3 matches the cylinder of the drainer, and the diameter matches the inner diameter of the drainer connection flange.

[0038] The upper end of the explosion-proof junction box 1 is provided with a junction box cover plate 4 away from the electric heating tube 3. The junction box cover plate 4 is connected to the upper flange of the explosion-proof junction box by fastening screws 5, and a sealing gasket 6 is added in the middle. In application, the junction box cover plate 4, the nut 8, the flange cover plate 2 and other joints are all provided with sealing gaskets 6.

[0039] The explosion-proof junction box 1 is provided with an explosion-proof cable connection port, the connection port is provided with a threaded joint, and the nut 8 is installed at the threaded joint. The sealant 10 is filled at the opening of the metal protective tube 13. The magnesium oxide powder 11 is filled in the metal protective tube 13, and the magnesium oxide powder 11 is high-purity and high-quality magnesium oxide powder 11, with high thermal conductivity and good insulation performance.

[0040] In practical applications, combined with Figure 2, put the electric heating tube 3 of the explosion-proof electric heating tube into the drainer through the connecting flange hole above the drainer cylinder, add a sealing gasket 6 between the flange cover 2 and the connecting flange of the drainer, and use the fastening screws 5 to connect and fasten the explosion-proof electric heating tube to the drainer. Open the junction box cover 4 and the wiring port nut 8, insert the power cord through the explosion-proof cable wiring port first, connect and fix it to the terminal 7, add the sealing gasket 6 to the junction box cover 4 and the wiring port nut 8, and use the fastening screws 5 to fix it. Check the sealing of each connection part to confirm that the sealing is good and the explosion-proof performance is good. Before powering on, confirm that the water level of the drainer water seal is normal to avoid dry burning of the electric heating tube. After power is turned on, the condensed water of the drainer can be heated and kept warm.

[0041] This new type of explosion-proof electric heating pipe for drainers is a tubular electric heating element, using high-quality seamless stainless steel pipe as the outer wall, with excellent overall performance and anti-corrosion and moisture-proof performance. The addition of an explosion-proof junction box meets the conditions for use in gas explosion-proof areas. At the same time, it has the characteristics of simple installation and convenient maintenance. The overall production and installation are simple, the cost is low, and it can be installed online, which has good promotion value.

Claims

1. An explosion-proof electric heating tube, characterized in that: The invention comprises an explosion-proof junction box (1), a flange cover plate (2), and an electric heating tube (3), wherein the explosion-proof junction box (1) and the electric heating tube (3) are respectively located on both sides of the flange cover plate (2) and connected to the flange cover plate (2), the explosion-proof junction box (1) is located on the non-waterline side above the flange cover plate (2), and the electric heating tube (3) is located on the waterline side below the flange cover plate (2); A junction box cover (4) is provided at the upper end of the explosion-proof junction box (1) away from the electric heating tube (3), and a fastening screw (5) is provided on the junction box cover (4). The junction box cover (4) is fastened to the junction box upper flange (14) by the fastening screw (5); a terminal post (7) and an insulator (9) are provided inside the explosion-proof junction box (1), and an explosion-proof cable connection port for a power line to pass through is provided on the outside, a threaded joint is provided at the explosion-proof cable connection port, and a nut (8) is installed at the threaded joint, and the power line passes through the explosion-proof cable connection port and is connected and fixed to the terminal post (7); a sealing gasket (6) is provided at the connection between the junction box cover (4), the nut (8) and the flange cover (2); The flange cover plate (2) is fastened to the connecting flange above the drain cylinder by bolts, and the electric heating pipe (3) is placed in the condensed water in the drain cylinder; the heating part of the electric heating pipe (3) is immersed below the water level of the drain cylinder to heat the water seal in the drain; The electric heating tube (3) comprises a metal protective tube (13) installed below the flange cover (2), an electric heating wire (12) located inside the metal protective tube (13) and connected to the bottom of the flange cover (2), a sealant (10) filled at the mouth of the metal protective tube (13), and a heat-conducting insulating material filled inside the metal protective tube (13); an insulator (9) is externally arranged at the bottom of the terminal (7) and extends into the metal protective tube (13); and the electric heating wire (12) passes through the insulator (9) and is electrically connected to the terminal (7).

2. The explosion-proof electric heating tube according to claim 1, characterized in that: The flange cover plate (2) is made of carbon steel and its size matches the connection flange of the drainer; the sealing gasket (6) is a rubber gasket, a silicone gasket or a polytetrafluoroethylene gasket.

3. The explosion-proof electric heating tube according to claim 1, characterized in that: The length of the electric heating tube (3) matches the cylinder of the drainer, and the diameter matches the inner diameter of the connecting flange of the drainer.

4. The explosion-proof electric heating tube according to claim 1, characterized in that: The explosion-proof cable connection port is located in the middle of the outer side of the explosion-proof junction box (1).

5. The explosion-proof electric heating tube according to claim 1, characterized in that: The electric heating tube (3) is a seamless stainless steel tube.

6. An explosion-proof electric heating tube according to any one of claims 1 to 5, characterized in that: The thermally conductive insulating material is magnesium oxide powder (11).

7. The explosion-proof electric heating tube according to claim 6, characterized in that: The fastening screw (5) is a moisture-proof screw.

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