CN218033718U

CN218033718U - Air heater

Info

Publication number: CN218033718U
Application number: CN202221346674.3U
Authority: CN
Inventors: 乔旭; 郁苓; 刘玉鹏; 岳萍; 邹文; 严加未
Original assignee: State Owned Sida Machinery Manufacturing Co ltd
Current assignee: State Owned Sida Machinery Manufacturing Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-12-13
Anticipated expiration: 2032-05-31

Abstract

Withstand voltage little in having the use for solving current air heater, when pressure was too high, cold and hot shunt tubes yielding leads to its and heating pipe contact to cause the technical problem that the heater short circuit damaged, the utility model provides an air heater. The whole body type cold and hot shunt pipe of the utility model adopts the seamless steel pipe and is provided with the spiral guide plate, the cold air flow entering the heater is homogenized by the spiral guide plate, so that the air flow pressure flowing to the cold and hot shunt pipe is more uniform, the condition that the local area pressure of the cold and hot shunt pipe is overlarge can not occur, and the pressure resistance of the cold and hot shunt pipe is ensured; in addition, the outer wall of the spiral guide plate is in contact with but not connected with the inner wall of the outer barrel, so that multi-point support is provided for the whole-body type cold and hot shunt pipe, and the strength of the whole-body type cold and hot shunt pipe is improved; therefore, the utility model discloses effectively solved the withstand voltage low problem of cold and hot shunt tubes, cold and hot shunt tubes is difficult for taking place to warp in the use, has avoided warping the short circuit condition that leads to its and heating pipe contact to cause.

Description

Air heater

Technical Field

The utility model relates to a medium pressure air rapid heater.

Background

In an aviation environment control product ground simulation test, air is generally required to be rapidly heated, and the outlet temperature reaches over several hundred ℃ in a short time. The existing air heater has the problems of small pressure resistance and slow temperature control response speed in the use process, such as an air heater which is approximately arranged in an isothermal-wall pipe and is disclosed in the patent document with the application number of 201910207085.3 and an air electric heater which is provided with seepage holes and arranged on a heating pipe and disclosed in the patent document with the application number of 201810044286.1. When pressure is too high, cold and hot shunt tubes are easy to deform and lead to the fact that the heater is in short circuit damage due to the fact that the cold and hot shunt tubes are in contact with the heating tube, and the temperature sensor is arranged at the tail end or the outside of the heater, the effective temperature in the heater cannot be effectively fed back in time, the phenomenon that temperature is excessively adjusted when the heater is used is caused, temperature stabilization time is long, and energy waste is caused.

SUMMERY OF THE UTILITY MODEL

In order to solve present air heater and to have withstand voltage little in the use, when pressure was too high, cold and hot shunt tubes yielding leads to its and heating pipe contact to cause the technical problem that the heater short circuit damaged, the utility model provides an air heater.

The technical scheme of the utility model is that:

an air heater comprises an outer barrel, a cold and hot shunt pipe and an electric heating pipe component which are sequentially arranged from outside to inside along the radial direction; one end of the outer cylinder is connected with a hot air outlet which is used for outputting hot air generated by the electric heating pipe component; it is characterized in that: the cold and hot shunt pipe is a steel pipe with openings at two ends, and a spiral guide plate is arranged on the outer wall of the cold and hot shunt pipe.

Further, the outer wall surface of the spiral guide plate is only contacted with and not connected with the inner wall surface of the outer cylinder.

Further, the spiral guide plate extends from one end of the cold and hot shunt pipe to the other end of the cold and hot shunt pipe.

Furthermore, the cold and hot shunt pipe is a seamless steel pipe with openings at two ends.

Furthermore, a temperature sensor is arranged in the middle of the electric heating pipe component.

Furthermore, one end of the cold and hot flow dividing pipe is connected and communicated with the hot gas outlet through a flow combiner.

Furthermore, one end of the flow combiner is large and the other end of the flow combiner is small, the large end of the flow combiner is connected with the cold and hot flow dividing pipe, and the small end of the flow combiner is connected with the hot air flow outlet.

Furthermore, the electric heating assembly consists of a plurality of electric heating pipes, and an insulating sleeve is sleeved outside each electric heating pipe.

Furthermore, the electric heating pipe is fixedly supported in the cold and hot shunt pipe by a heating pipe supporting plate, and a plurality of airflow holes are further formed in the heating pipe supporting plate.

The utility model has the advantages that:

1. the utility model adopts seamless steel pipe on the whole body type cold and hot shunt pipe and is provided with the spiral guide plate, and homogenizes the cold air flow entering the heater by utilizing the spiral guide plate, so that the air flow pressure flowing to the cold and hot shunt pipe is more uniform, the condition of overlarge pressure intensity of the local area of the cold and hot shunt pipe can not occur, and the pressure resistance of the cold and hot shunt pipe is ensured; in addition, the outer wall of the spiral guide plate is in contact with but not connected with the inner wall of the outer barrel, so that a multi-point supporting effect is provided for the whole-body type cold and hot shunt pipe, and the strength of the whole-body type cold and hot shunt pipe is improved; therefore, the utility model discloses effectively solved the withstand voltage low problem of cold and hot shunt tubes, cold and hot shunt tubes is difficult for taking place to warp in the use, has avoided warping the short circuit condition that leads to its and heating pipe contact to cause, has improved the life of heater.

2. The utility model discloses set up the true temperature that temperature sensor is used for feeding back electric heating pipe assembly middle part at the heater middle part, avoided the too high phenomenon of temperature overshoot and urceolus outer wall local area high temperature phenomenon.

3. The utility model discloses set up the ware that converges at cold and hot shunt tubes of entire body formula and hot gas stream outlet, made the hot gas stream all flow in the hot gas stream outlet from cold and hot shunt tubes, improved energy utilization and rateed, reduced the energy consumption.

4. The utility model discloses simple structure, safe and reliable.

Drawings

Fig. 1 is a schematic structural diagram of the present invention (arrows in the figure indicate the flow direction of air flow).

Fig. 2 is a radial cross-sectional view of the present invention.

Fig. 3 is a radial sectional view of the present invention.

Fig. 4 is a schematic structural view of the through-body type spiral shunt tube of the present invention.

Description of reference numerals:

101-outer cylinder, 102-flange, 103-appliance positioning seat, 104-cold and hot shunt layer supporting plate, 105-airflow inlet flange, 106-cold and hot shunt layer positioning plate, 200-cold airflow layer, 301-cold and hot shunt pipe, 302-spiral guide plate, 303-cold and hot shunt layer limiting plate, 304-junction device, 305-guide pipe, 401-electric heating pipe, 402-heating pipe insulating sleeve, 403-heating pipe supporting plate, 404-airflow hole, 405-heating pipe current connecting plate I, 406-heating pipe current plate, 407-heating pipe current connecting plate II, 408-sensor positioning hole, 500-hot airflow layer, 601-temperature sensor 1, 602-end socket flange, 603-sealing ring, 604-end socket, 701-binding post, 702-current bar, 703-insulating appliance, 704-insulating bush, 800-airflow junction region, 901-outlet flange, connecting pipe, 903-outlet end socket, and 904-airflow outlet.

Detailed Description

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

As shown in figures 1-3, the utility model provides a medium pressure air rapid heater, including urceolus subassembly, cold and hot shunting layer, heating pipe subassembly, head subassembly, electric components and export subassembly.

The outer cylinder component comprises an outer cylinder 101, a flange 102, an electric appliance positioning seat 103, a cold and hot split layer supporting plate 104, a cold and hot split layer positioning plate 106 and an air inlet flange 105; the flange 102 is welded at one end of the outer cylinder 101 and used for realizing connection with a seal head assembly; a plurality of electrical appliance positioning seats 103 are used for installing and positioning electrical components; a plurality of electrical appliance positioning seats 103 are distributed at intervals along the circumference of the outer barrel 101, welded on the outer side wall of the outer barrel 101 and close to the flange 102; the cold and hot diversion layer supporting plate 104 and the cold and hot diversion layer positioning plate 106 are both positioned in the outer cylinder 101 and are welded with the inner wall of the outer cylinder 101, and the cold and hot diversion layer supporting plate 104 and the cold and hot diversion layer positioning plate 106 are used for supporting and positioning the cold and hot diversion layer; an air inlet is provided on the outer side wall of the outer barrel 101 remote from the flange 102, and an air inlet flange 105 is provided at the air inlet.

As shown in fig. 4, the cold and hot split layer includes a cold and hot split pipe 301, a flow combiner 304, and a flow guide pipe 305, which are connected in sequence. The cold and heat shunt pipe 301 is a seamless steel pipe with openings at two ends, a certain distance is formed between the cold and heat shunt pipe 301 and the outer barrel 101, and a cold air flow layer is formed between the cold and heat shunt pipe 301 and the outer barrel 101; the outer side wall of the cold and heat shunt pipe 301 is welded with a spiral guide plate 302 and a cold and heat shunt layer limiting plate 303; the spiral guide plate 302 extends from one end of the cold and heat shunt pipe 301 to the other end, and the outer wall of the spiral guide plate 302 is only contacted with and not connected with the inner wall of the outer cylinder 101; on one hand, the spiral flow guide plate 302 is used for stabilizing and homogenizing cold air flow entering the cold air flow layer from the air flow inlet, so that the pressure of the cold air flow on the outer wall of the cold and hot flow dividing pipe 301 is uniform, the local pressure intensity is prevented from being too large, and the deformation caused by the local pressure intensity is prevented; on the other hand, the spiral guide plate 302 forms a support for the cold and hot shunt pipe 301, so that the strength of the cold and hot shunt pipe is improved, and the cold and hot shunt pipe is not easy to deform. Therefore, the service life and the compressive strength of the cold and hot shunt pipe 301 can be effectively prolonged through the spiral guide plate 302, and the pressure resistance of the whole air heater is improved. In addition, due to the homogenization effect of the spiral guide plate 302 on the air flow, the cold air flow uniformly flows in the cold air flow layer to cool the outer barrel 101 and the cold and heat shunt pipe 301, so that the heat of the cold air flow is taken away, the temperature of the outer wall surface of the outer barrel 101 is ensured to be below 40 ℃, the use safety is ensured, and the personnel can be prevented from being scalded. Cold and hot reposition of redundant personnel layer limiting plate 303 is located between spiral guide plate 302 and the ware of converging 304, and cold and hot reposition of redundant personnel layer limiting plate 303 and cold and hot reposition of redundant personnel layer locating plate 106 welded connection realize being connected of cold and hot shunt tubes 301's one end and urceolus 101 inner wall, and cold and hot shunt tubes 301's the other end and cold and hot reposition of redundant personnel layer backup pad 104 clearance fit are supported it spacing by cold and hot reposition of redundant personnel layer backup pad 104. The flow combiner 304 is used for combining the hot air flow, so that the hot air flow can completely flow into the flow guide pipe 305 to improve the energy utilization rate. The flow conduit 305 is used to deliver the hot gas stream to the gas stream outlet.

As shown in fig. 3, the electric heating tube assembly comprises an electric heating tube 401, a heating tube support plate 403, a heating tube current plate 406, three heating tube current connection plates one 405 and one heating tube current connection plate two 407; the number of the electric heating pipes 401 is multiple, and a heating pipe insulating sleeve 402 is sleeved outside each heating pipe 401 to prevent two adjacent electric heating pipes from being contacted to cause short circuit; a plurality of through holes for passing the electric heating pipes 401 sleeved with the heating pipe insulating sleeves 402 and a plurality of airflow holes 404 for passing airflow are formed on the heating pipe supporting plate 403; a sensor positioning hole 408 for penetrating and fixing the temperature sensor is also arranged in the middle of the heating pipe supporting plate 403; the electric heating pipe 401 is supported and fixed in the cold and heat shunt pipe 301 by a plurality of heating pipe supporting plates 403 which are arranged in parallel; a certain distance is formed between the electric heating tube 401 positioned at the outermost ring and the inner wall of the cold and heat shunt tube 301, and a hot air flow layer is formed between the electric heating tube 401 and the inner wall of the cold and heat shunt tube 301.

In the electric heating pipes 401, a plurality of electric heating pipes 401 are connected in series through electric heating pipe current plates 406 to form an electric heating pipe unit, and three electric heating pipe units are formed; the three electric heating tube units are connected in parallel through an electric heating tube current plate 406; three electric heating tube units are connected to three-phase alternating current through three first current connection plates 405 and one second heating tube current connection plate 407.

As shown in fig. 1, the head assembly includes a temperature sensor 601, a head flange 602, a seal ring 603, and a head 604; the testing end of the temperature sensor 601 penetrates through the sensor positioning hole 408 on the heating pipe supporting plate 403, and the fixing end of the temperature sensor 601 is positioned in the threaded hole on the end socket 604 and is in threaded connection with the threaded hole; the temperature sensor 601 can feed back the temperature of the hot air flow layer in the electric heating pipe assembly, and the temperature is used as a basis for adjusting the power-on current of the electric heating pipe assembly, so that the temperature overshoot caused by overhigh temperature of the heating pipe can be avoided. The seal head flange 602 is welded at the opening end of the seal head 604, and is butted with the flange 102 in the outer cylinder component through the seal head flange 602 to realize the connection of the seal head component and the outer cylinder component; a sealing ring 603 is provided between the head flange 602 and the flange 102 for sealing.

As shown in fig. 1 and 3, a plurality of electrical components are distributed at intervals along the circumference of the outer barrel 101 and are distributed at the electrical appliance positioning seat 103; each electrical component comprises a binding post 701, a current bar 702, an insulating electrical appliance 703 and an insulating bush 704, wherein the current bar 702 is arranged in the outer barrel 101, one end of the binding post 701 penetrates through the electrical appliance positioning seat 103 and then is connected with the current bar 702 through a bolt, and the other end of the binding post 701 is used for being connected with a three-phase power line; the current bar 702 is connected with a first heating pipe current connecting plate 405 and a second heating pipe current connecting plate 407 in the electric heating pipe assembly through bolts; the insulating electric appliance 703 is sleeved outside the wiring terminal 701 and is connected with the electric appliance positioning seat 103 through a nut; the insulating bush 704 is sleeved outside the terminal 701 and is positioned between the two insulating electric appliances 703, and the insulating bush 704 is in clearance fit with the electric appliance positioning seat 103.

As shown in fig. 1, the outlet assembly includes an outlet flange 901, a connecting pipe 902, an outlet head 903, and a gas flow outlet 904; an outlet flange 901 is welded at one end of the connecting pipe 902, and the outlet flange 901 is used for realizing the connection between the airflow outlet of the air heater and the air inlet of the product to be tested; the other end of the connecting pipe 902 is welded with the top end of the outlet seal head 903, and the bottom end of the outlet seal head 903 is butted with the outer cylinder 101.

After the air heater of the utility model is integrally assembled, the outer cylinder 101, the cold and hot shunt tubes 301 and the electric heating tube component 4 are sequentially arranged from outside to inside along the radial direction; the flow combiner 304 has a large end located in the outer cylinder 101, a small end located in the outlet end 903, and a flow guide pipe 305 located in the connecting pipe 902. Compared with the scheme without the junction station 304, the hot air flow can be prevented from flowing between the cold and hot water flow dividing pipe 301 and the outer barrel 101 through the junction station 304, the hot air loss is reduced, and the energy utilization rate is improved.

The utility model discloses a theory of operation:

cold air flow enters a cold air flow layer from an air flow inlet on the outer barrel 101, is finished by the spiral guide plate 302 in the cold air flow layer, flows to the end part far away from the air flow inlet along the cold air flow layer, enters the cold and hot flow dividing pipe 301 from the end part of the cold and hot flow dividing pipe 301 (two end openings of the cold and hot flow dividing pipe 301), and is divided into two parts: a part of airflow flows through the electric heating pipe assembly to take away heat in the heating pipe; a portion of the airflow passes through airflow holes 404 in the tube support plate 403 to remove heat generated outside the electric-heating tube assembly; all the airflow is converged into the flow combiner 304 and then flows out through the airflow outlet 904; during this period, the temperature sensor 601 feeds back the temperature inside the heating tube assembly in real time, avoiding temperature overshoot.

Claims

1. An air heater comprises an outer barrel, a cold and hot shunt pipe and an electric heating pipe component which are sequentially arranged from outside to inside along the radial direction; one end of the outer cylinder is connected with a hot air outlet which is used for outputting hot air generated by the electric heating pipe component; the method is characterized in that: the cold and hot shunt pipe is a steel pipe with openings at two ends, and a spiral guide plate is arranged on the outer wall of the cold and hot shunt pipe.

2. The air heater of claim 1, wherein: the outer wall surface of the spiral guide plate is only contacted with the inner wall surface of the outer barrel and is not connected with the inner wall surface of the outer barrel.

3. An air heater according to claim 1 or 2, wherein: the spiral guide plate extends from one end of the cold and hot shunt pipe to the other end of the cold and hot shunt pipe.

4. The air heater according to claim 3, wherein: the cold and hot shunt pipe is a seamless steel pipe with openings at two ends.

5. The air heater of claim 4, wherein: and a temperature sensor is arranged in the middle of the electric heating pipe component.

6. The air heater of claim 5, wherein: one end of the cold and hot shunt pipe is connected and communicated with the hot air outlet through a confluence device.

7. The air heater of claim 6, wherein: one end of the junction station is large and the other end of the junction station is small, the large end of the junction station is connected with the cold and hot flow dividing pipe, and the small end of the junction station is connected with the hot air flow outlet.

8. The air heater of claim 7, wherein: the electric heating component consists of a plurality of electric heating pipes, and an insulating sleeve is sleeved outside each electric heating pipe.

9. The air heater of claim 8, wherein: the electric heating pipe is fixedly supported in the cold and hot shunt pipe by a heating pipe supporting plate, and a plurality of airflow holes are further formed in the heating pipe supporting plate.