CN218179267U

CN218179267U - Constant temperature field winding pipe heater

Info

Publication number: CN218179267U
Application number: CN202222441825.XU
Authority: CN
Inventors: 俞力克; 戚洪明; 林彬
Original assignee: Wuxi Huaneng Electric Heating Equipment Co ltd
Current assignee: Wuxi Huaneng Electric Heating Equipment Co ltd
Priority date: 2022-09-15
Filing date: 2022-09-15
Publication date: 2022-12-30
Anticipated expiration: 2032-09-15

Abstract

The utility model relates to an isothermal field winding pipe heater, including the heating furnace, be equipped with a plurality of electric heating element in the heating furnace, still include: the heat exchanger comprises a plurality of heat exchange tubes which are annularly arranged, and the heat exchange tubes are arranged along the axis or spirally arranged along the axis; the flange is provided with a plurality of fixing holes, the heat exchange tubes are inserted into the fixing holes, and the heat exchange tubes correspond to the fixing holes one by one; the electric heating element is annularly arranged along the heat exchanger and is not in contact with the heat exchanger; the electric heating elements are arranged along the axis of the heat exchanger in an annular array, and the heating power of the electric heating elements is inversely proportional to the flow direction of the medium added into the heat exchanger. The utility model provides a pair of equal temperature field realizes heating through the heat exchange tube and the electric heating element that the annular set up around the pipe heater, and the pressure drop is little to electric heating element does not contact with the heat exchanger, has avoided taking place the electric leakage, and the security is high, and the heat insulating ability is better simultaneously, can be suitable for the heating of various gas, liquid.

Description

Constant temperature field winding pipe heater

Technical Field

The utility model relates to a heater, especially an isothermal field winding pipe heater.

Background

The traditional electric heater generally adopts a circulating heater structure and generally comprises an electric heating element and a baffle plate. The baffles have the advantage of increasing the turbulence of the heated fluid, but have the disadvantage of creating dead space behind the baffles and also increasing the pressure drop. Because the electric heating element is in direct contact with the heated fluid, once the electric heating element leaks electricity, if the electric heating element is a conductive medium, potential safety hazards are brought.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a temperature field such as little, the difficult electric leakage of pressure drop, the security is good around tub heater, concrete technical scheme is:

the utility model provides a constant temperature field winding pipe heater, includes the heating furnace, be equipped with a plurality of electric heating element in the heating furnace, still includes: the heat exchanger comprises a plurality of annularly arranged heat exchange tubes, and the heat exchange tubes are arranged along the axis or spirally arranged along the axis; the flange is provided with a plurality of fixing holes, the heat exchange tubes are inserted into the fixing holes, and the heat exchange tubes correspond to the fixing holes one by one; wherein the electric heating element is annularly arranged along the heat exchanger and is not in contact with the heat exchanger; the electric heating elements are arranged along the axis of the heat exchanger in an annular array, and the heating power of the electric heating elements is inversely proportional to the flow direction of a medium added into the heat exchanger.

Preferably, both ends of the heat exchange tube are provided with necking necks.

Preferably, the flange further comprises a sheath inserted on the constriction and connected with the flange.

Preferably, the device further comprises a supporting device, and the supporting device comprises: a plurality of inner support rings are arranged along the axis and are positioned inside the heat exchanger; and the outer support ring is connected with the inner support ring, and the outer support ring is positioned outside the heat exchanger.

Further, the method also comprises the following steps: the two ends of the supporting pipe are respectively connected with the flanges at the two ends; and

and the connecting pipes are arranged along the supporting pipes, and two ends of each connecting pipe are respectively connected with the supporting pipe and the inner supporting ring.

Preferably, the heat exchanger further comprises a temperature sensor, and the temperature sensor is mounted on the heat exchanger.

Compared with the prior art the utility model discloses following beneficial effect has:

the utility model provides a pair of equal temperature field realizes heating through the heat exchange tube and the electric heating element that the annular set up around the pipe heater, and the pressure drop is little to electric heating element does not contact with the heat exchanger, has avoided taking place the electric leakage, and the security is high, and the heat insulating ability is better simultaneously, can be suitable for the heating of various gas, liquid.

Drawings

FIG. 1 is a schematic diagram of an isothermal field wound tube heater;

FIG. 2 is a schematic diagram of the construction of a heat exchanger and an electric heating element;

FIG. 3 is a heat exchanger employing a straight tube configuration;

FIG. 4 is a cross-sectional view of FIG. 3;

FIG. 5 is a schematic view of the flange construction;

FIG. 6 is a schematic view of the support device;

FIG. 7 is a schematic view of the construction of a heat exchanger equipped with a support device;

fig. 8 is a sectional view of fig. 7.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings.

As shown in fig. 1 to 8, an isothermal field coil heater includes a heating furnace 6, a heat exchanger 1, a flange 2, and a supporting device 4.

A plurality of electric heating elements 5 are arranged in the heating furnace 6, and a heat-insulating layer is also arranged on the heating furnace 6. Due to the heat insulation effect of the heat insulation layer, a heat dissipation area of a traditional electric heater does not need to be configured, and heat dissipation is reduced.

The heat exchanger 1 comprises a plurality of heat exchange tubes 11 arranged in an annular array, the heat exchange tubes 11 are spirally arranged along an axis, two ends of each heat exchange tube 11 are respectively provided with a necking neck 12, the heat exchange tubes 11 are fixed on fixing holes 21 of the flanges 2 after being necked in, and the heat exchange tubes 11 correspond to the fixing holes 21 one by one. The sheath 3 is arranged on the necking 12, and the sheath 3 is fixed on the flange 2. The necking down 12 can reduce the size of the flange 2, reduce the cost and reduce the influence caused by expansion with heat and contraction with cold.

The heat exchanger 1 is provided with a temperature sensor. The temperature sensor is used for detecting the temperature, controlling the switch of the electric heating element 5 and ensuring that the medium is heated to the set temperature.

The supporting device 4 includes an inner support ring 41, an outer support ring 42, a support tube 43, and a connection tube 44. The inner support ring 41 and the outer support ring 42 are fixed together through bolts, and the heat exchange tube 11 is located between the inner support ring 41 and the outer support ring 42. The two ends of the supporting tube 43 are respectively connected with the flanges 2 at the two ends; the two ends of the connecting pipe 44 are respectively connected with the supporting pipe 43 and the inner supporting ring 41, and the connecting pipes 44 are arranged in an annular array.

The electric heating element 5 is not in contact with the heat exchanger 1, and is heated in a heat radiation mode, so that the problem of electric leakage is solved, and the safety is improved.

The electric heating elements 5 are fixed inside the heating furnace 6, and the electric heating elements 5 are arranged in an annular array along the axis of the heat exchanger 1. The heating power of the electric heating element 5 is inversely proportional to the flow direction of the medium fed into the heat exchanger 1. The power output of the electric heating element 5 is set inversely according to the flowing direction of the heated medium, the output power is from high to low, namely the output power of the electric heating element at the input position with low medium temperature is the highest, the output power of the electric heating element at the output position with high medium temperature is the lowest, and the output power is matched with the required power of the heated medium, so that the temperature of the heat exchange tube 11 is uniform, and the constant-intensity temperature design is realized. The problem that the existing electric heating element is not suitable for heating the temperature sensitive medium due to the adoption of constant power is solved.

The heat exchange tube 11 is spirally arranged along an axis to form a winding structure, the heat exchange tube 11 is arranged along the axis to form a straight tube structure, and the winding structure or the straight tube structure is selected according to working conditions.

It is suitable for heating various gases and liquids, and can heat medium with relatively sensitive temperature.

Since the heat exchange pipe 11 is a single pipe from the inlet to the outlet without any welding point in the middle, the heat exchange pipe can be used for heating some clean media.

When the heat exchanger works, medium fluid enters from the flange 2 at the right end, and the medium fluid exchanges heat with the heat exchange tube 11 and then flows out from the flange 2 at the left end. The electric heating element 5 outputs different power loads according to the direction of the medium fluid from right to left, and the power loads are arranged from high to low.

Through actual test, all be 520KW than traditional electric heater product, the radiating power reduces to 5.2KW from 30KW, and the pressure drop reduces to 0.8KPA from 2KPA, and whole volume also reduces 13%.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, and these embodiments will fall within the scope of the claims of the present invention.

Claims

1. The utility model provides an isothermal field is around tubular heater, includes heating furnace (6), install a plurality of electric heating element (5) in heating furnace (6), its characterized in that still includes:

the heat exchanger (1) comprises a plurality of annularly arranged heat exchange tubes (11), and the heat exchange tubes (11) are arranged along an axis or spirally arranged along the axis; and

the heat exchange tube heat exchanger comprises a flange (2), wherein a plurality of fixing holes (21) are formed in the flange (2), the heat exchange tubes (11) are inserted into the fixing holes (21), and the heat exchange tubes (11) correspond to the fixing holes (21) one by one;

wherein the electric heating element (5) is arranged annularly along the heat exchanger (1) and is not in contact with the heat exchanger (1); the electric heating elements (5) are arranged along the axis of the heat exchanger (1) in an annular array, and the heating power of the electric heating elements (5) is inversely proportional to the flow direction of the added medium in the heat exchanger (1).

2. An isothermal field coil heater according to claim 1, characterized in that both ends of said heat exchange tube (11) are provided with constrictions (12).

3. An isothermal field coil heater according to claim 2, characterized in that it further comprises a sheath (3), said sheath (3) being inserted on said constriction (12) and being connected to said flange (2).

4. An isothermal field coil heater according to claim 1, characterized by further comprising a support means (4), said support means (4) comprising:

a plurality of inner supporting rings (41), wherein the inner supporting rings (41) are arranged along the axis, and the inner supporting rings (41) are positioned inside the heat exchanger (1); and

an outer support ring (42), the outer support ring (42) with the inner support ring (41) is connected, the outer support ring (42) is located outside the heat exchanger (1).

5. The constant temperature field coil heater of claim 4, further comprising:

the two ends of the supporting pipe (43) are respectively connected with the flanges (2) at the two ends; and

the connecting pipes (44) are arranged along the supporting pipes (43), and two ends of each connecting pipe (44) are respectively connected with the supporting pipes (43) and the inner supporting ring (41).

6. A constant temperature field wound tube heater according to any of claims 1 to 5, further comprising a temperature sensor mounted on the heat exchanger (1).