CN217607999U - Immersive 6 kW-level heat-insulation explosion-proof electric heating rod - Google Patents

Abstract

A heating pipe is penetratingly arranged on a first flange plate, the front side of the first flange plate is a heating area, the rear side of the first flange plate is a non-heating area, and the outer side of the heating pipe of the heating area is provided with a connecting cover which is fixed on the first flange plate; the heating pipe is connected with an external power supply through a wiring terminal. The utility model discloses an immersive 6kW level explosion-proof electric heating rod that insulates against heat can solve among the prior art heating pipe easily dry combustion method, crack, the too high, the short problem of life of terminal box operational environment temperature.

Description

Immersive 6 kW-level heat-insulation explosion-proof electric heating rod

Technical Field

The utility model relates to an electric heating pipe technical field.

Background

In the production of crude oil, crude oil extracted from underground is discharged through an oil conveying pipe, and the crude oil is solidified, namely wax deposition is often caused in the conveying process due to the high viscosity of the crude oil. The wax deposition phenomenon of an oil pipeline is influenced by factors such as pipe wall temperature difference, crude oil components, flow velocity, pipeline surface characteristics, pipeline pressure and the like, and wax, asphaltene and colloid in the crude oil are deposited on the pipe wall, so that the conveying resistance of the crude oil is increased. Wax crystals adhere to the inner wall of the pipeline under the action of adsorption force and are continuously deposited, and the magnitude of the adsorption force depends on the surface wettability between the wax crystals and the pipeline wall. The wax deposition phenomenon on the inner wall of an oil pipeline is the main reason for reducing the pipeline conveying capacity, and even causes a pipe condensation accident in severe cases, thereby causing potential safety hazards to pipeline conveying. At present, the main measure for solving the problem of crude oil condensation in an oil pipeline is to heat the oil pipeline, so that the crude oil condensation is avoided to block the pipeline as far as possible.

At present, crude oil in a crude oil pipeline is heated mainly in an electric heating mode so as to reduce the viscosity of liquid circulation and facilitate transportation and pulling. The electric heating rod is a novel and environment-friendly heat energy conversion electric heating element, the electric heating tube generates heat, and the heat energy is conducted to the crude oil to raise the oil temperature so as to reduce the viscosity of the crude oil and reduce the crystallization of the crude oil. The structure of the heating pipe is that high-temperature resistance wires are uniformly distributed in a high-temperature resistant stainless steel seamless pipe, and crystallized magnesia powder with good heat conduction performance and insulating performance is densely filled in a gap part, so that the heat transfer efficiency is enhanced, and the heating in the pipe is uniform. When current passes through the high-temperature resistance wire, the generated heat is diffused to the surface of the metal tube through the crystallized magnesium oxide powder and then is transferred to the heated crude oil, so that the heating purpose is achieved. The heating mode has small volume, flexible installation and high efficiency of converting electric energy into heat energy, and can ensure that higher working temperature can be obtained under lower operating pressure. In addition, the heat transfer agent acts on a pipeline for heating, and has high heat transfer speed and good temperature uniformity.

However, the electric heating rods on the market at present have some problems in the use process, such as certain potential safety hazards, which mainly appear as follows: the pipe diameter of the heating pipe is small, the heating area is insufficient, and the heating effect is not good enough; in addition, the old heating tube generally has the phenomenon of dry burning (the heating area of the liquid electric heating tube is not completely immersed in liquid), and the heating surface load cannot meet the dry burning requirement, so that the heating tube bursts, and the service life of the electric heating rod is greatly reduced; the existing heating pipe is directly contacted with crude oil for heating, the crude oil is easy to coke on the surface of the heating pipe, so that the local temperature of the heating pipe is too high, and the heating pipe can burst; in the electric heating process, the temperature of the electric heating rod is too high and is not easy to control, so that local high temperature or low temperature is easily caused, and safety accidents such as pipe explosion, coking and the like can be caused once the control is not good; the junction box of the old heating rod is made of iron and is easy to corrode; a heat insulation device is not arranged between the junction box and the heating pipe, the heat insulation effect is poor, the high temperature of the heating pipe is conducted to the junction box, the circuit is easy to burn, and the risk of electric leakage exists; in addition, the connection of the existing device and the pipeline is unstable and easy to loosen.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned problem that current crude oil pipeline electric heating pipe exists, the utility model provides an immersive 6kW level explosion-proof electric heating rod that insulates against heat.

The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is: an immersion type 6 kW-level heat-insulation explosion-proof electric heating rod is characterized in that a heating pipe is penetratingly mounted on a first flange plate 4, the front side of the first flange plate 4 is a heating area, the rear side of the first flange plate 4 is a non-heating area, a connecting cover 19 is arranged on the outer side of the heating pipe of the heating area, and the connecting cover 19 is fixed on the first flange plate 4; the heating tube is connected to an external power source through a terminal 16.

The heating pipe runs through a second flange 5 located on the rear side of a first flange 4 to be installed, a non-heating area is arranged between the first flange 4 and the second flange 5, a junction box 6 is installed on the rear side of the second flange 5, a binding post 16 is located in the junction box 6, a junction box end cover 7 is installed on the rear side of the junction box 6, and a wiring opening 10 is formed in the junction box 6.

The heating pipe includes U type first heating pipe 1, second heating pipe 2 and third heating pipe 3, and on first flange plate 4 and second flange plate 5 were worn to adorn side by side to first heating pipe 1 and second heating pipe 2, third heating pipe 3 was the crossing perpendicular dress of wearing on a flange plate 4 and second flange plate 5 with first heating pipe 1 and second heating pipe 2, and the heating pipe is 321 stainless steel material.

And a support sheet 8 is vertically sleeved on the heating pipe of the heating area.

And a heat insulation plate 9 is sleeved outside the heating pipe of the non-heating area.

And a superconducting coating is arranged on the outer surface of the heating pipe of the heating area.

The outer surface of the heating tube of the non-heating area is wrapped with an insulating material 20.

And the heating pipe is filled with crystallized magnesium oxide powder.

The utility model discloses an immersive 6kW level explosion-proof electrical heating rod that insulates against heat has following advantage:

1. compared with the old electric heating rod, the utility model is provided with the support sheet, which not only increases the strength of the heating rod, but also can prevent the heating pipe from shaking, and in addition, the heat exchange area is obviously increased, so that the heating efficiency is further improved;

2. compared with the old electric heating rod, the utility model fills the magnesia powder in the heating pipe, thereby strengthening the heat transfer, avoiding the dry burning phenomenon of the old electric heating rod, strengthening the use safety of the electric heating rod and prolonging the service life of the heating pipe;

3. compared with the old electric heating rod, the high-performance heat insulation material is wrapped between the heating pipe and the flange plate, namely the non-heating area of the heating pipe, and the heating pipe of the pipe section is cooled. During the use, the heat that the heating pipe transmitted to the terminal box is will be by the thermal insulation material separation of high performance, has reduced the temperature of terminal box, in addition, between first ring flange of heat insulating board department and the terminal box, has also reduced the ambient temperature of terminal box position to can effectively prevent the cable high temperature in the terminal box ageing. The temperature difference at the cold and hot joints can be prevented from being too large, so that the heating pipe is not distorted and deformed, the use safety of the electric heating rod is further improved, and the service life of the electric heating rod is further prolonged;

4. the junction box of the utility model adopts corrosion-resistant stainless steel materials, which can protect the circuit better and has stronger anticreep safety;

5. compare with old-fashioned electrical heating rod, the utility model discloses increased the stainless steel connecting cover of fixed mounting on the ring flange, arranged the heating pipe in the period in, can prevent heating pipe and crude oil direct contact effectively, made the outer surface coking of heating pipe, and then lead to the heating pipe local temperature too high and burst. Even if the heating pipe bursts, because the restriction of stainless steel adapter sleeve, the piece can not be excessive to prevent to cause the incident. In addition, because the heating pipe does not directly contact with crude oil, the heating pipe does not need to be cleaned frequently, and when the heating pipe needs to be cleaned, only dirt on the connecting cover needs to be cleaned, so that the heating pipe is convenient to maintain and replace.

To sum up, use the technical scheme of the utility model the heating pipe easily dry combustion method among the prior art can be solved, burst, terminal box operational environment high temperature, the short problem of life.

Drawings

Fig. 1 is the whole structure diagram of the heat-insulating explosion-proof electric heating rod of the utility model.

Fig. 2 is a bottom view of the heat-insulating explosion-proof electric heating rod of the present invention.

Fig. 3 is a top view of the heat-insulating explosion-proof electric heating rod of the present invention.

Fig. 4 is an internal structure view of the heat-insulating explosion-proof electric heating rod of the present invention.

Fig. 5 is a structural view of the installation of the heating tube of the heat-insulating explosion-proof electric heating rod in the junction box of the present invention.

Fig. 6 is a first flange structure diagram of the heat-insulating explosion-proof electric heating rod of the present invention.

Fig. 7 is a front view structural diagram of the support sheet of the heat-insulating explosion-proof electric heating rod of the present invention.

Fig. 8 is a side view of the supporting sheet of the heat-insulating explosion-proof electric heating rod of the present invention.

Fig. 9 is a structure view of the junction box of the heat-insulating explosion-proof electric heating rod of the present invention.

Fig. 10 is a front view structural diagram of the terminal box end cover of the heat-insulating explosion-proof electric heating rod of the present invention.

Fig. 11 is a side view of the terminal box end cover of the heat-insulating explosion-proof electric heating rod of the present invention.

In the figure: 1. a first heating pipe 2, a second heating pipe 3, a third heating pipe 4, a first flange 5, a second flange 6 and a junction box, 7, a junction box end cover 8, a supporting sheet 9, a heat insulation plate 10, a wiring port 11, a first flange threaded hole 12 and a grounding screw; 13. bolt, 14, nut, 15, nameplate, 16, wiring terminal, 17, gasket, 18, junction box threaded hole, 19, connecting cover, 20 and heat insulating material.

Detailed Description

The utility model discloses an immersive 6kW level explosion-proof electrical heating rod structure that insulates against heat is shown as figure 1-4, and the heating pipe runs through first ring flange 4 and the installation of second ring flange 5, as shown in figure 6, has seted up 3 screw holes 11 on the first ring flange 1 for with electrical heating rod fixed mounting on oil pipeline or oil storage tank, wherein, the zone of heating pipe is inside the pipeline, non-zone of heating and terminal box 6 are outside the pipeline. A non-heating area is arranged between the first flange plate 4 and the second flange plate 5, the front side of the first flange plate 4 is a heating area, and the outer surface of a heating pipe of the non-heating area is wrapped with a heat insulating material 20, and the heating pipe of the pipe section is cooled. When the heat insulation type junction box is used, heat transferred from the heating pipe to the junction box is blocked by the heat insulation material, and the temperature of the junction box is reduced. A heat insulation plate 9 is sleeved outside the heating tube of the non-heating area, a superconducting coating is arranged on the outer surface of the heating tube of the heating area, so that the heating efficiency of the heating tube is higher, a connecting cover 19 is arranged on the outer side of the heating tube of the heating area, and the connecting cover 19 is fixed on the first flange plate 4; the heating tube is connected to an external power source through a terminal 16. The junction box 6 is installed on the rear side of the second flange plate 5, the wiring terminal 16 is located in the junction box 6, the junction box end cover 7 is installed on the rear side of the junction box 6, the wiring port 10 is formed in the junction box 6, the heating pipe comprises a U-shaped first heating pipe 1, a second heating pipe 2 and a third heating pipe 3, the first heating pipe 1 and the second heating pipe 2 penetrate through the first flange plate 4 and the second flange plate 5 side by side, the third heating pipe 3 and the first heating pipe 1 and the second heating pipe 2 are crossed and perpendicularly penetrate through the first flange plate 4 and the second flange plate 5, the heating pipe is made of 321 stainless steel materials, the heat conduction performance is good, corrosion resistance and dry burning resistance are achieved, the arrangement is compact in structure, the heating efficiency of the heating pipe is improved, and the surface load on the unit area can be reduced. The supporting sheet 8 is vertically sleeved on the heating pipe of the heating area, the diameter and the supporting sheet of the heating pipe are increased, the strength is increased, the heating rod can be prevented from shaking, and the heat exchange area is obviously increased. The heating pipe is filled with the crystallized magnesia powder heat conduction material, so that the heating rod is prevented from being burnt dry, and the service life of the heating rod is prolonged.

The high-performance heat insulation materials are wrapped on the non-heating areas of the first heating pipe 1, the second heating pipe 2 and the third heating pipe 3, namely the pipe sections of the first heating pipe 1, the second heating pipe 2 and the third heating pipe 3 between the heating areas of the first heating pipe 1, the second heating pipe 2 and the third heating pipe 3 and the junction box, when the heat insulation material connecting device is used, the heat transmitted from the first heating pipe 1, the second heating pipe 2 and the third heating pipe 3 to the junction box 6 is blocked by the heat insulation materials, and the heat insulation plates 9 with excellent performance are further arranged between the non-heating areas of the first heating pipe 1, the second heating pipe 2 and the third heating pipe 3 and the junction box 6, so that the heat of the heating pipes is further prevented from being transmitted to the junction box, the environmental temperature of the junction box is also reduced, and the high-temperature aging of cables in the junction box can be effectively prevented; the first heating pipe 1, the second heating pipe 2 and the third heating pipe 3 are added with heat conducting materials, so that the phenomenon that the first heating pipe 1, the second heating pipe 2 and the third heating pipe 3 are dry-burned like an old electric heating rod is avoided, and the first heating pipe 1, the second heating pipe 2 and the third heating pipe 3 are prevented from bursting.

As shown in the figure, the electric heating rod comprises three U-shaped first heating pipes 1, second heating pipes 2 and third heating pipes 3, the upper ends of the first heating pipes 1, the second heating pipes 2 and the third heating pipes 3 are connected with a first flange plate 4 and a second flange plate 5, and a binding post 16 is fixed at the tops of the first heating pipes 1, the second heating pipes 2 and the third heating pipes 3 through nuts 14 and gaskets 17, as shown in fig. 5. The upper end of the second flange 5 is provided with a groove, the bottom of the junction box 6 is provided with a limiting block which is matched with the groove, and the junction box 6 is fixedly arranged on the second flange 5.

The first heating pipe 1, the second heating pipe 2 and the third heating pipe 3 are all composed of two vertical sections and a transition section connecting the two vertical sections, the vertical sections and the transition section are integrally formed, the outer diameters of the three heating pipes are all set to be 12mm, the first heating pipe 1, the second heating pipe 2 and the third heating pipe 3 are all independently arranged, and the height of the transition section of the third heating pipe 3 is higher than the height of the transition section of the first heating pipe 1 and the second heating pipe 2. The third heating pipe 3 is fixed on first ring flange 1 and second ring flange 2 with two other heating pipes alternately, wherein first heating pipe 1 and second heating pipe 2 parallel placement, and the third heating pipe 3 sets up 90 with the crossing angle of first heating pipe 1 and second heating pipe 2, saves space, does benefit to the heat transfer. The outer surface of the heating tube is provided with the superconducting coating, so that the heat conduction speed is improved, and the time required by heating crude oil is reduced. The first heating pipe 1, the second heating pipe 2 and the third heating pipe 3 are in seamless sealing connection with the upper end faces of the first flange plate 4 and the second flange plate 5, and the positions of all the end parts of the heating pipes 1, 2 and 3 form concentric circles with the center of the flange plate as the center of a circle and are distributed at intervals of 60 degrees.

Firstly, 96 support sheets 8 are sequentially arranged on the first heating pipe 1, the second heating pipe 2 and the third heating pipe 3 in a penetrating manner, are small in size and compact in structure, are used for being supported in the connecting cover to prevent the heating pipes from deforming, and can also play a role of a rib to increase the heat exchange area. Afterwards with first heating pipe 1, second heating pipe 2, third heating pipe 3 is fixed to wear to adorn on first ring flange 4 and second ring flange 5, with first heating pipe 1, second heating pipe 2, third heating pipe 3 is fixed on second ring flange 5, connect the wire between binding post and heating wire, the wiring end includes binding post 12 and the crimping bolt of threaded connection on binding post 12, first heating pipe 1, second heating pipe 2, be provided with the heater strip in the third heating pipe 3, the heater strip resistance of being close to the wiring end of heater strip is less, thereby the cold junction has been constituted, heating pipe 1, 2, it has magnesium oxide powder to fill in 3, first heating pipe 1, second heating pipe 2, third heating pipe 3 is stainless steel pipe, be provided with gasket 13 between its and the clamp stud, thereby accomplish the installation to first heating pipe 1, second heating pipe 2, third heating pipe 3.

The pipe sections between the first flange plate 4 and the heating areas of the first heating pipe 1, the second heating pipe 2 and the third heating pipe 3, namely the non-heating areas, are wrapped with high-performance heat insulation materials. On the pipe section between the first flange 4 and the terminal box 6, a well performing heat shield 9 is arranged. Connecting cover 19 fixed mounting is on first ring flange 4, covers first heating pipe 1, second heating pipe 2, third heating pipe 3 wherein, makes heating pipe and crude oil direct contact not, prevents effectively that heating pipe and crude oil direct contact from coking at the surface of heating pipe, and then leads to the too high and burst consequence of heating pipe local temperature, plays fine explosion-proof effects, and is convenient for clear up the dirt to and maintain and change the heating pipe.

The junction box 6 is a hollow cylinder, a groove is formed in the upper end of the second flange plate 5, an inward convex limiting block is arranged at the bottom of the junction box 6 and matched with the groove, and the junction box 6 is fixedly mounted on the second flange plate 5. The lower end face of the terminal box end cover 7 is consistent with the upper end face of the terminal box 6 in shape, and the terminal box 6 is connected with the end cover 7 through the bolt 13 to achieve close fitting. Two convex wiring ports 10 are formed in the side face of the junction box 6, an external power line is connected with wiring terminals 16 at the upper ends of the first heating pipe 1, the second heating pipe 2 and the third heating pipe 3 in the junction box 6 through the wiring ports 10, and power is input to the first heating pipe 1, the second heating pipe 2 and the third heating pipe 3 to carry out heating work. The junction box is made of high-temperature-resistant and corrosion-resistant stainless steel materials, so that although the working environment of the junction box is severe, the internal cable can be well protected from being damaged by high temperature, and the use safety of the electric heating rod and the service life of the electric heating rod are further improved. Two wiring ports are formed in the side face of the junction box, so that the angle of the electric heating rod connected to a power supply is more flexible, and the problem of difficult wiring is avoided.

As shown in fig. 9-11, four threaded holes 18 are uniformly distributed on the upper end surface of the terminal box 6, the lower end surface of the terminal box end cover 7 is identical to the upper end surface of the terminal box 6 in shape, and the terminal box 6 is tightly attached to the end cover 7 through bolts 13. The terminal box end cover 7 is designed to be in a central cylindrical shape and a side reinforcing rib form, and the reinforcing rib is provided with a groove processing threaded hole, so that the light weight is achieved as far as possible, and the total weight is reduced.

While the invention has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the protection scope of the present invention.

Claims (8)

1. The utility model provides an immersive 6kW level explosion-proof electric heating rod that insulates against heat which characterized in that: the heating pipe is arranged on the first flange plate (4) in a penetrating mode, the front side of the first flange plate (4) is a heating area, the rear side of the first flange plate (4) is a non-heating area, a connecting cover (19) is arranged on the outer side of the heating pipe of the heating area, and the connecting cover (19) is fixed on the first flange plate (4); the heating tube is connected with an external power supply through a binding post (16).

2. An immersive 6 kW-level heat insulation and explosion-proof electric heating rod according to claim 1, wherein: the heating pipe runs through second ring flange (5) that are located first ring flange (4) rear side and installs, is the non-zone of heating between first ring flange (4) and second ring flange (5), and second ring flange (5) rear side installation terminal box (6), terminal (16) are located terminal box (6), and terminal box (6) rear side installation terminal box end cover (7) are equipped with wiring mouth (10) on terminal box (6).

3. An immersive 6 kW-grade heat insulation and explosion-proof electric heating rod according to claim 2, wherein: the heating pipe includes first heating pipe (1), second heating pipe (2) and third heating pipe (3) of U type, and on first flange dish (4) and second flange dish (5) were worn to adorn side by side in first heating pipe (1) and second heating pipe (2), third heating pipe (3) were the perpendicular dress of wearing of crossing on a flange dish (4) and second flange dish (5) with first heating pipe (1) and second heating pipe (2), and the heating pipe is 321 stainless steel material.

4. An immersive 6 kW-grade heat insulation and explosion prevention electric heating rod according to claim 1, wherein: and a support sheet (8) is vertically sleeved on the heating pipe of the heating area.

5. An immersive 6 kW-level heat insulation and explosion-proof electric heating rod according to claim 1, wherein: and a heat insulation plate (9) is sleeved outside the heating pipe of the non-heating area.

6. An immersive 6 kW-level heat insulation and explosion-proof electric heating rod according to claim 1, wherein: and a superconducting coating is arranged on the outer surface of the heating pipe of the heating area.

7. An immersive 6 kW-grade heat insulation and explosion prevention electric heating rod according to claim 1, wherein: the outer surface of the heating pipe of the non-heating area is wrapped with a heat insulating material (20).

8. An immersive 6 kW-grade heat insulation and explosion prevention electric heating rod according to claim 1, wherein: and the heating pipe is filled with crystallized magnesium oxide powder.

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