CN212785917U

CN212785917U - Immersion heater

Info

Publication number: CN212785917U
Application number: CN202021962537.3U
Authority: CN
Inventors: 刘兵; 李玲俐; 张仕林; 蔡梦龙
Original assignee: Backer Heating Technologies Shenzhen Co Ltd
Current assignee: Backer Heating Technologies Shenzhen Co Ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-03-23
Anticipated expiration: 2030-09-09

Abstract

The utility model discloses an submergence formula heater, include: the heating device comprises a control box, a mounting part, a heating element, a first fixing part and a second fixing part; the control box is connected with one side of the mounting part, and the other side of the mounting part is respectively connected with the first fixing part and the heating element; the first fixing part is located in the middle of the heating element, and the second fixing part is connected with the first fixing part and the heating element respectively. The immersion heater in this embodiment fixes the heating element through first fixed part and second fixed part, and then has increased heating element's whole rigidity, has reduced the frequency and the amplitude of the vibration of heating element during operation to greatly reduced the impact of high-speed fluid to heating element and the influence of welding part, guaranteed the long-term normal operating of immersion heater in high-speed fluid.

Description

Immersion heater

Technical Field

The utility model relates to a temperature control technical field, in particular to submergence formula heater.

Background

With the increasing demand for electric power and the imbalance between the distribution of energy resources and power demand, long-distance and large-scale power transmission becomes a necessary way for optimizing the allocation of power resources. The high-voltage direct-current transmission system is an important mode for forming a backbone network frame of a strong power grid and carrying out large-scale long-distance transmission of electric power. The most core technology in high voltage direct current transmission is mainly focused on converter stations, which realize energy conversion between direct current and alternating current, and converter valves are the core equipment in the converter stations.

When the converter station is in normal operation, a silicon controlled element in the converter valve generates a large amount of heat loss, and if the heat cannot be taken away in time, the heat loss of the converter valve element is poor, the element is damaged due to overheating, and even serious accidents such as direct current blocking and the like can be caused. These heat losses are taken away by the internally circulating cooling water and the water is cooled by the external valve cooling system to the required inlet water temperature, so that the converter valve water cooling plant is an important guarantee in relation to the reliable operation of the converter station.

When the temperature is lower in winter and the valve body is stopped, the temperature of circulating cooling water needs to be adjusted, and if the temperature of the circulating cooling water is lower than the dew point temperature of the valve body, the surfaces of pipelines and devices of valve cooling equipment are in danger of condensation, and electric leakage accidents can be caused. The heater is used for preventing condensation and adjusting the temperature of the circulating cooling water to be above a dew point.

The traditional heater has insufficient inherent rigidity of a cantilever beam structure of a heating element immersed in a cooling liquid part, and the resonance of the cantilever beam structure is easily caused by the turbulence and impact generated by high-speed fluid. The resonance is prone to fatigue failure at the weld site.

Thus, the prior art has yet to be improved and enhanced.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned prior art's weak point, the utility model aims at providing an immersion heater aims at overcoming current heater because of the rigidity is not enough, easily produces the defect of fatigue failure at the welded position.

The utility model provides a technical scheme that technical problem adopted as follows:

an embodiment of the utility model provides an immersion heater, include: the heating device comprises a control box, a mounting part, a heating element, a first fixing part and a second fixing part; the control box is connected with one side of the mounting part, and the other side of the mounting part is respectively connected with the first fixing part and the heating element; the first fixing part is located in the middle of the heating element, and the second fixing part is connected with the first fixing part and the heating element respectively.

As a further improved technical scheme, in the immersion heater, the heating element comprises a plurality of heating pipes which are arranged in a circumferential manner, and one end of each heating pipe penetrates through the other side of the mounting part and is positioned in the control box.

As a further improved solution, in the immersion heater, the second fixing portion includes a plurality of fixing rings axially disposed on the first fixing portion and the heating tube; the fixing ring comprises a first ring body connected with the first fixing part, a second ring body which is circumferentially distributed on the periphery of the first ring body and connected with the heating pipe, a first connecting arm connected with the first ring body and the second ring body, and a second connecting arm connected with the adjacent second ring body.

As a further improved technical solution, in the immersion heater, the first fixing portion is cylindrical, a first fixing hole adapted to the diameter of the first fixing portion is formed in the first ring body, and a second fixing hole adapted to the diameter of the heating pipe is formed in the second ring body.

As a further improved technical scheme, in the immersion heater, a fastening hole is formed in the outer side surface of the second ring body, the fastening hole is communicated with the second fixing hole, a fixing column is arranged in the fastening hole, and the fixing column is abutted to the heating pipe.

As a further improved technical solution, in the immersion heater, the control box comprises a box body and a cover plate; one end of the box body is connected with one side of the mounting part, and the other end of the box body is connected with the cover plate; wherein, the box body is provided with a wire outlet hole.

As a further improved technical solution, in the immersion heater, the length of the first fixing portion is greater than or equal to the length of the heating tube.

As a further improved technical scheme, in the immersion heater, a plurality of connecting holes and through holes are formed on the mounting part.

As a further improved technical solution, in the immersion heater, the first fixing portion is made of stainless steel or carbon steel.

As a further improved technical solution, in the immersion heater, an end surface of the first fixing portion, which is far away from the mounting portion, is a sealing end.

Compared with the prior art, the embodiment of the utility model provides a have following advantage:

the utility model discloses embodiment provides an immersion heater, include: the heating device comprises a control box, a mounting part, a heating element, a first fixing part and a second fixing part; the control box is connected with one side of the mounting part, and the other side of the mounting part is respectively connected with the first fixing part and the heating element; the first fixing part is located in the middle of the heating element, and the second fixing part is connected with the first fixing part and the heating element respectively. The immersion heater in this embodiment fixes the heating element through first fixed part and second fixed part, and then has increased heating element's whole rigidity, has reduced the frequency and the amplitude of the vibration of heating element during operation to greatly reduced the impact of high-speed fluid to heating element and the influence of welding part, guaranteed the long-term normal operating of immersion heater in high-speed fluid.

Drawings

Fig. 1 is a perspective view of an immersion heater provided by the present invention;

fig. 2 is an exploded view of an immersion heater provided by the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

fig. 4 is a front view of an immersion heater provided by the present invention;

fig. 5 is a schematic structural view of a fixing ring in an immersion heater according to the present invention;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;

fig. 7 is a working state diagram of an immersion heater provided by the present invention.

In the figure: 100. a control box; 200. an installation part; 300. a heating element; 400. a first fixed part; 500. a second fixed part; 201. a through hole; 110. a box body; 120. a cover plate; 111. a wire outlet hole; 310. heating a tube; 320. connecting sheets; 510. a fixing ring; 520. a first ring body; 530. a second ring body; 540. a first connecting arm; 550. a second connecting arm; 521. a first fixing hole; 531. a second fixing hole; 532. a fastening hole; 534. fixing a column; 600. and a flow passage.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the embodiments and claims, the terms "a" and "an" can mean "one or more" unless the article is specifically limited.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model discloses an immersion heater, please refer to fig. 1 to 4 together. The immersion heater comprises: a control box 100, a mounting part 200, a heating element 300, a first fixing part 400 and a second fixing part 500; the control box 100 is connected to one side of the mounting part 200, and the other side of the mounting part 200 is connected to the first fixing part 400 and the heating element 300, respectively; the first fixing portion 400 is located in the middle of the heating element 300, and the second fixing portion 500 is connected to the first fixing portion 400 and the heating element 300, respectively.

In an embodiment of the present invention, the control box 100 is used to protect the circuit wires (not shown in the figure) in the immersion heater, and the mounting portion 200 is used to connect the control box 100 and the heating element 300 and to connect with the external components, specifically, the heating element 300 and the mounting portion are welded. The heating element 300 is used for being immersed into high-speed fluid and generating heat, and the first fixing portion 400 and the second fixing portion 500 are connected with the heating element 300, so that the overall rigidity of the heating element 300 is improved, and the impact resistance of the heating element 300 in the high-speed fluid is improved. The immersion heater in this embodiment fixes the heating element 300 through the first fixing portion 400 and the second fixing portion 500, and further increases the overall rigidity of the heating element 300, thereby reducing the frequency and amplitude of vibration of the heating element 300 during operation, greatly reducing the impact influence of high-speed fluid on the heating element 300, avoiding the failure risk of the welding position of the heating element 300 and the mounting portion 200, and ensuring long-term normal operation of the immersion heater in the high-speed fluid.

Optionally, the mounting portion 200 is a flange, a plurality of connecting holes and a plurality of through holes 201 are formed in the mounting portion 200, and the first fixing portion 400 is fixedly connected (for example, welded) to the mounting portion 200. The resistance of the high-speed fluid can be effectively reduced and the weight thereof can be reduced by adopting the porous structure on the mounting part 200, and further, the mounting part 200 connects the control box 100 and the external part through the connection hole.

Wherein, the control box 100 comprises a box body 110 and a cover plate 120; one end of the case 110 is connected to one side of the mounting part 200, and the other end is connected to the cover plate 120; the box body 110 is provided with an outlet hole 111. Specifically, the cover plate 120 and the box body 110 are detachably connected, the box body 110 is fixedly connected (for example, welded) to one side of the mounting portion 200, the wire outlet 111 is located on any side surface of the box body 110, wherein, in actual use, for preventing the wire from being scratched by the wire outlet 111, the wire outlet 111 is matched with a glan head of a corresponding specification for use.

As a further scheme, the heating element 300 includes a plurality of heating pipes 310, the plurality of heating pipes 310 are arranged in a circumferential direction, and one end of the plurality of heating pipes 310 penetrates through the other side of the mounting part 200 and is located in the control box 100.

In the embodiment of the present invention, two adjacent heating pipes 310 are connected at one end by a connecting piece 320, and two adjacent heating pipes 310 are connected at the other end. Specifically, the plurality of heating pipes 310 are disposed around the middle of the first fixing portion 400, and the plurality of heating pipes 310 are connected to the first fixing portion 400 through the second fixing portion 500. One end of each of the two adjacent heating tubes 310 is connected to a power supply, and the other end of each of the two adjacent heating tubes 310 is connected to form a U-shape. It should be understood that the above-mentioned connection shapes for the electric heating tube 310 are only examples, and the specific connection shapes should be selected according to actual requirements.

The heating tube 310 is made of high temperature resistance alloy, industrial magnesium oxide powder and stainless steel tube. The surface of the heating tube 310 is polished or passivated or plated or sprayed to reduce fluid resistance and improve corrosion resistance.

Specifically, to ensure the axial fixing of the heating tube 310, the length of the first fixing portion 400 is greater than or equal to the length of the heating tube 310. A plurality of second fixing parts 500 may be provided in the axial direction of the first fixing part 400 to facilitate good fixing of the heating pipe 310. If the length of the first fixing portion 400 is smaller than the length of the heating tube 310, the heating tube 310 cannot be connected to the first fixing portion 400 through the second fixing portion 500 at a portion of the heating tube 310 beyond the first fixing portion 400, which affects the overall rigidity of the heating tube 310.

Optionally, in order to avoid corrosion by the high-speed fluid, the first fixing portion 400 is made of stainless steel or carbon steel with a surface subjected to an anti-rust treatment. For example, grade 304 stainless steel. It should be understood that the present invention is not limited to stainless steel.

More specifically, to prevent high-speed fluid from entering the first fixing portion 400, the end surface of the first fixing portion 400 away from the mounting portion 200 is a sealing end. The first fixing portion 400 may be a single pipe, rod, or the like located between the heating pipes 310, and the first fixing portion 400 may be hollow (e.g., a hollow steel pipe with a wall thickness of not less than 2 mm) to reduce the weight of the first fixing portion 400. Of course, the first fixing portion 400 may be provided as a plurality of tubes/rods/bars. For example, two or more central tubes are symmetrically distributed between the respective heating tubes 310.

As a further alternative, referring to fig. 5 and fig. 6, the second fixing portion 500 includes a plurality of fixing rings 510 axially disposed on the first fixing portion 400 and the heating tube 310; the fixing ring 510 includes a first ring body 520 connected to the first fixing portion 400, a second ring body 530 circumferentially distributed around the first ring body 520 and connected to the heating pipe 310, a first connecting arm 540 connecting the first ring body 520 and the second ring body 530, and a second connecting arm 550 connecting the adjacent second ring body 530.

In the embodiment of the present invention, the second fixing portion 500 is axially disposed along the first fixing portion 400 and the heating pipes 310, so that each heating pipe 310 is connected to the first fixing portion 400, and each heating pipe 310 is circumferentially positioned, optionally, the second fixing portion 500 is a plurality of fixing rings 510. The single fixing rings 510 each include a first ring body 520 at the center, a second ring body 530 disposed around the first ring body 520, a first connecting arm 540 for connecting the first ring body 520 and the second ring body 530, and a second connecting arm 550 for connecting the adjacent second ring bodies. In practical use, the first fixing portion 400 is sequentially disposed in the first ring 520, and the heating tubes 310 are disposed in the second ring 530, so as to connect the heating tubes 310 to the first fixing portion 400, thereby improving the integrity and rigidity of the entire heating element 300.

In addition, the second fixing portion 500 may also be a fixing piece (not shown) having a shape corresponding to the shape of the fixing ring 510 but a thickness smaller than the fixing ring, so as to reduce the weight of the second fixing portion.

As a further scheme, the first fixing portion 400 is cylindrical, a first fixing hole 521 adapted to the diameter of the first fixing portion 400 is formed in the first ring body 520, and a second fixing hole 531 adapted to the diameter of the heating pipe 310 is formed in the second ring body 530.

In the embodiment of the present invention, the first fixing portion 400 can be a hollow cylinder, and correspondingly, the first fixing hole 521 formed in the first ring body 520 is a circular hole. Similarly, when the heating tube 310 is a cylindrical tube, the second fixing hole 531 formed in the second ring 530 is also a circular hole. Of course, if the first fixing portion 400 is a rectangular column, the shape of the corresponding first fixing hole 521 is changed to a rectangular hole. The shape of the first fixing hole 521 and the shape of the second fixing hole 531 are correspondingly adapted to the shapes of the first fixing portion 400 and the heating pipe 310, and are selected according to requirements during actual use, which is not described herein again.

As a further scheme, a fastening hole 532 is formed in an outer side surface of the second ring body 530, the fastening hole 532 is communicated with the second fixing hole 531, a fixing post 534 is disposed in the fastening hole 532, and the fixing post 534 abuts against the heating pipe 310.

In the embodiment of the present invention, when the heating pipe 310 is placed in the second fixing hole 531, a slight gap may exist between the heating pipe 310 and the second fixing hole 531, and the heating pipe 310 is not completely fastened to the second fixing hole 531. A fixing post 534 may be disposed in the fastening hole 532 through a fastening hole 532 formed at an outer side surface of the second ring body 530, and the heating pipe 310 may be firmly abutted against the second fixing hole 531 through the fixing post 534, so that the second fixing part 500, each heating pipe 310, and the first fixing part 400 may be integrally connected. Optionally, the fixing posts 534 are screw bolts, and the fastening holes 532 are internally provided with internal threads engaged with the fixing posts 534, wherein, in order to further ensure stable connection between the second fixing portion 500 and each heating tube 310, the fixing posts 534 and the second ring 530 may be welded after the fixing posts 534 are fitted into the fastening holes 532, thereby improving integrity between the second fixing portion 500 and the heating tubes 310.

The operation of the immersion heater of the present embodiment will be described in detail below:

specifically, please refer to fig. 7. In practical use, each heating tube 310 is placed into the flow channel 600, the mounting portion 200 is fixedly connected with the flange above the flow channel, and high-speed fluid flows into the liquid inlet below the flow channel and flows out from the liquid outlet above the flow channel after being heated by the heating tube in the heating element. The first fixing part 400, the respective heating tubes 310, and the second fixing part 500 are integrally connected by disposing the first fixing part 400 in the middle of the respective heating tubes 310 and then fixing the first fixing part 400 and the respective heating tubes 310 by the second fixing part 500. The overall rigidity of the heating element 300 is increased, and thus vibration of the heating element 300 caused by high-speed fluid during operation can be reduced.

To sum up, the utility model provides an submergence formula heater includes: the heating device comprises a control box, a mounting part, a heating element, a first fixing part and a second fixing part; the control box is connected with one side of the mounting part, and the other side of the mounting part is respectively connected with the first fixing part and the heating element; the first fixing part is located in the middle of the heating element, and the second fixing part is connected with the first fixing part and the heating element respectively. The immersion heater in this embodiment fixes the heating element through first fixed part and second fixed part, and then has increased heating element's whole rigidity, has reduced the frequency and the amplitude of the vibration of heating element during operation to greatly reduced the impact of high-speed fluid to heating element and the influence of welding part, guaranteed the long-term normal operating of immersion heater in high-speed fluid.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

Claims

1. An immersion heater, comprising: the heating device comprises a control box, a mounting part, a heating element, a first fixing part and a second fixing part; the control box is connected with one side of the mounting part, and the other side of the mounting part is respectively connected with the first fixing part and the heating element; the first fixing part is located in the middle of the heating element, and the second fixing part is connected with the first fixing part and the heating element respectively.

2. An immersion heater as claimed in claim 1 wherein the heating element comprises a plurality of heating tubes arranged circumferentially with one end of the plurality of heating tubes passing through the other side of the mounting portion within the control box.

3. The immersion heater of claim 2 wherein the second stationary portion includes a plurality of stationary rings axially disposed on the first stationary portion and the heating tube; the fixing ring comprises a first ring body connected with the first fixing part, a second ring body which is circumferentially distributed on the periphery of the first ring body and connected with the heating pipe, a first connecting arm connected with the first ring body and the second ring body, and a second connecting arm connected with the adjacent second ring body.

4. An immersion heater as claimed in claim 3, wherein the first fixing portion is cylindrical, a first fixing hole is formed in the first ring body and adapted to the diameter of the first fixing portion, and a second fixing hole is formed in the second ring body and adapted to the diameter of the heating tube.

5. The immersion heater as claimed in claim 4, wherein a fastening hole is formed in an outer side surface of the second ring body, the fastening hole is communicated with the second fixing hole, a fixing post is arranged in the fastening hole, and the fixing post is abutted against the heating pipe.

6. An immersion heater as claimed in claim 1, wherein the control box comprises a box body and a cover plate; one end of the box body is connected with one side of the mounting part, and the other end of the box body is connected with the cover plate; wherein, the box body is provided with a wire outlet hole.

7. An immersion heater as claimed in claim 2, wherein the length of the first fixing portion is greater than or equal to the length of the heating tube.

8. An immersion heater as claimed in claim 1 wherein the mounting portion is provided with a plurality of attachment holes and through-holes.

9. An immersion heater as claimed in claim 1 wherein the first fixing portion is of stainless steel or carbon steel.

10. An immersion heater as claimed in claim 1, wherein the end face of the first fixing portion remote from the mounting portion is a sealing end.