CN214792549U

CN214792549U - Treatment furnace for increasing preheating speed of QPQ parts

Info

Publication number: CN214792549U
Application number: CN202121183154.0U
Authority: CN
Inventors: 薛雯娟
Original assignee: Chongqing Saifeisi Metal Materials Co ltd
Current assignee: Chongqing Saifeisi Metal Materials Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-11-19
Anticipated expiration: 2031-05-28

Abstract

The utility model belongs to the technical field of equipment for heat treatment, specifically disclose improve QPQ part preheating rate's treatment furnace, including furnace body and bell, be equipped with the heater strip on the furnace body outer wall, the bell bottom is equipped with the spiral pipe, and the export of spiral pipe is towards the furnace body, and the export of spiral pipe is coaxial with the furnace body, and the bottom of furnace body is equipped with the inlet port, still is equipped with the circulating fan who is located the furnace body outside, is connected with the air-supply line between circulating fan's import and the spiral pipe, is connected with the exhaust pipe between circulating fan's export and the inlet port. Adopt the utility model discloses a scheme, circulating fan are at the during operation, because circle is tangent in spiral pipe export and the hanger, circulating fan is at the during operation on the one hand, and the air current in the furnace body has the trend of the inside flow of hanger, and in the later reentrant spiral pipe, on the other hand, the setting of spiral pipe for the air current forms spiral rising's trend, makes the better action of hot gas flow be located the inside part of hanger on, thereby has improved the part preheating rate that is located hanger inside.

Description

Treatment furnace for increasing preheating speed of QPQ parts

Technical Field

The utility model belongs to the technical field of equipment for heat treatment, concretely relates to improve QPQ part preheating rate's treatment furnace.

Background

QPQ, known as a nitrogen-carbon-oxygen composite surface treatment technique, refers to a method of improving the surface properties of a metal material by placing a ferrous metal part in two salt baths having different properties, infiltrating an Fe — N compound mainly formed of nitrogen into the surface of the metal material through the salt baths, and simultaneously forming an Fe — C compound and an oxygen compound with a small amount of carbon infiltration.

The common nitrogen-carbon-oxygen co-permeation technology is mainly applied to the fields of automobiles, petrochemical industry, dies, textiles, aerospace and the like, the treatment temperature of the common nitrogen-carbon-oxygen co-permeation technology is 500-580 ℃, a hanger is adopted to place parts to be treated on the hanger in batches, a frame of the hanger is combined with a picture 1, the internal structure of the hanger is arranged according to the parts to be treated, the hanger needs to be preheated before entering a salt bath furnace, the existing preheating furnace comprises a furnace body buried in heat-insulating bricks, heating wires are arranged on the inner wall of the furnace body, a furnace cover is arranged at the top of the furnace body, and in order to control the air pressure and the temperature in the furnace, an air pipe is arranged on the furnace cover and can exhaust smoke in the furnace and adjust the pressure in the furnace, but the heat loss in the furnace body is serious, so that the preheating speed of the parts in the furnace is low, and the production efficiency cannot be improved.

SUMMERY OF THE UTILITY MODEL

Not enough to exist among the prior art, the utility model provides an improve QPQ part preheating rate's processing furnace to solve among the prior art internal calorific loss of furnace serious, make the preheating rate of part slow in the stove, the efficiency of production can't obtain the problem that promotes.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

improve QPQ part preheating rate's processing furnace, including furnace body and bell, be equipped with the heater strip on the furnace body outer wall, the bell bottom is equipped with the spiral pipe, and the export of spiral pipe is tangent with the interior circle of hanger, and the export of spiral pipe is coaxial with the furnace body, and the bottom of furnace body is equipped with the inlet port, still is equipped with the circulating fan who is located the furnace body outside, is connected with the air-supply line between circulating fan's the import and the spiral pipe, is connected with the exhaust pipe between circulating fan's the export and the inlet port.

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

this scheme is when using, and in putting into the furnace body with the hanger of putting the part, close the bell and open heater strip work, make the inside temperature of furnace body rise, this in-process starts circulating fan work, and the inside steam of furnace body gets back to the furnace body once more through exhaust pipe and inlet port under the circulating fan effect, has so both guaranteed that heat loss in the furnace body reduces, can guarantee the pressure balance in the furnace body again.

In this scheme, circulating fan is at the during operation, because circle is tangent in spiral pipe export and the hanger, on the one hand circulating fan is at the during operation, and the air current in the furnace body is to the trend of the inside flow of hanger, and in the later reentrant spiral pipe, on the other hand, the setting of spiral pipe makes the air current form the trend that the spiral rises for the better action of hot gas flow is on being located the inside part of hanger, thereby has improved the inside part preheating rate of being located the hanger.

Further, a heat preservation layer is arranged outside the furnace body and is built by heat preservation bricks.

Has the advantages that: thus reducing the heat exchange between the interior of the furnace body and the external environment and reducing the heat loss.

Furthermore, the exhaust pipe is embedded in the heat insulation layer.

Has the advantages that: therefore, the heat exchange between the hot air flow and the outside in the flowing process of the hot air flow in the air exhaust pipe is reduced, and the heat loss is reduced.

Furthermore, the furnace cover is provided with heat preservation cotton, a middle cavity is arranged in the furnace cover, and the spiral pipe and the air inlet pipe are respectively communicated with the middle cavity.

Has the advantages that: the arrangement of the middle cavity enables hot air to be filled in the furnace cover when entering the air inlet pipe, and the heat preservation capability of the furnace cover to the furnace body is improved.

Further, a mounting cover is fixed at the bottom of the furnace cover, and the spiral pipe is fixed on the inner wall of the mounting cover.

Has the advantages that: this arrangement prevents the problem of collapse of the spiral tube during the flow of the air stream within the spiral tube.

Furthermore, a limiting ring positioned inside the furnace body is fixed at the bottom of the furnace body, and the inner diameter of the limiting ring is larger than the outer diameter of the bottom of the hanging tool.

Has the advantages that: the limiting ring is arranged to position the hanger, so that the limiting ring can be positioned in the middle of the furnace body, and the furnace body can better preheat parts on the hanger.

Furthermore, the air inlet is positioned between the limiting ring and the inner wall of the furnace body.

Has the advantages that: in addition, the air flow entering the furnace body is positioned between the limiting ring and the inner wall of the furnace body, so that the air flow is further promoted to enter the inside of the hanger under the air suction effect of the spiral pipe, and the preheating speed of the parts on the hanger is increased.

Furthermore, the air inlet is provided with a plurality of, and a plurality of air inlets are along the circumference of furnace body equidistant distribution.

Has the advantages that: thus, the hot air flow entering the furnace body is uniformly dispersed in the furnace body, and the air flow in the furnace body is promoted to enter the interior of the hanging tool from all directions.

The furnace cover is characterized by further comprising a frame positioned above the furnace cover, a hydraulic cylinder is arranged on the frame, a hydraulic rod of the hydraulic cylinder is fixed to the top of the furnace cover, and the air inlet pipe is a stainless steel corrugated pipe.

Has the advantages that: the opening and closing of the furnace cover are completed by the hydraulic cylinder, the difficulty of operation is reduced, and meanwhile, the air inlet pipe does not need to be taken down when the furnace cover is driven by the hydraulic cylinder to move up and down.

Drawings

Fig. 1 is a block diagram of a QPQ part hanger of some kind.

Fig. 2 is a cross-sectional view of embodiment 1 of the present invention.

Fig. 3 is a plan view of the spiral pipe according to embodiment 1 of the present invention.

Reference numerals in the drawings of the specification include: the furnace comprises a hanger 1, a furnace body 10, a furnace cover 11, a middle cavity 12, a spiral pipe 13, a mounting cover 14, a limiting ring 15, an air ring 16, an air inlet 17, an air inlet pipe 18, an exhaust pipe 19 and a heat preservation layer 20.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings, and specific embodiments will be given.

Example 1:

basically as shown in fig. 2 and fig. 3, improve QPQ part preheating rate's processing furnace, including furnace body 10, be equipped with heat preservation 20 outside furnace body 10, heat preservation 20 adopts insulating brick to build, it has resistive heater strip (not shown in the figure) to twine at the outer wall of furnace body 10, be equipped with the bell 11 that can open and close at the furnace body 10 top, bell 11 top bonds has the heat preservation cotton, be equipped with middle chamber 12 in bell 11, bell 11 bottom is equipped with spiral pipe 13 with middle chamber 12 intercommunication, the export of spiral pipe 13 is tangent with the interior circle of hanger 1, and the export of spiral pipe 13 sets up with furnace body 10 is coaxial, for preventing that spiral pipe 13 from warping, be fixed with installing cover 14 at bell 11 bottom, spiral pipe 13 is fixed on the inner wall of installing cover 14.

A limiting ring 15 positioned in the furnace body 10 is coaxially fixed at the bottom of the furnace body 10, the inner diameter of the limiting ring 15 is larger than the outer diameter of the bottom of the hanger 1, an air ring 16 is also arranged at the bottom of the furnace body 10, a plurality of air inlets 17 communicated with the air ring 16 are formed in the furnace body 10, the plurality of air inlets 17 are distributed at equal intervals along the circumferential direction of the furnace body 10, and the plurality of air inlets 17 are all positioned outside the limiting ring 15 (namely between the limiting ring 15 and the inner wall of the furnace body 10); on top of the insulation layer 20, a circulation fan (not shown) is provided, wherein an inlet of the circulation fan is connected to an air inlet pipe 18, and an outlet of the circulation fan is connected to an air outlet pipe 19, wherein the air inlet pipe 18 is communicated with the intermediate chamber 12, and the air outlet pipe 19 is embedded in the insulation layer 20 and communicated with the air ring 16.

Therefore, an operator puts the hanger 1 with the parts into the furnace body 10, the hanger 1 is positioned in the limiting ring 15, the furnace cover 11 is closed, the heating wires are opened to work, the temperature inside the furnace body 10 rises, the circulating fan is started to work in the process, hot air inside the furnace body 10 returns to the furnace body 10 again through the exhaust pipe 19 and the air inlet 17 under the action of the circulating fan, and therefore the reduction of heat loss in the furnace body 10 is guaranteed, and the pressure balance in the furnace body 10 can be guaranteed.

In addition, when the circulating fan works, the outlet of the spiral pipe 13 is tangent to the inner circle of the hanger 1, so that when the circulating fan works, the airflow in the furnace body 10 tends to flow towards the inside of the hanger 1 and then enters the spiral pipe 13, and on the other hand, the spiral pipe 13 is arranged, so that the airflow tends to rise spirally, and hot airflow acts on parts inside the hanger 1 better.

Example 2:

the difference from the embodiment 1 is that the embodiment 2 further comprises a frame located above the furnace cover 11, the frame is provided with a hoisting mechanism, the hoisting mechanism comprises a hydraulic cylinder, a hydraulic rod of the hydraulic cylinder is fixed to the top of the furnace cover 11, and the air inlet pipe 18 is a high-temperature-resistant stainless steel corrugated pipe, so that the air inlet pipe 18 does not need to be taken down when the hydraulic cylinder drives the furnace cover 11 to move up and down.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. Improve QPQ part preheating rate's treatment furnace, including furnace body and bell, be equipped with the heater strip on the furnace body outer wall, its characterized in that: the bell bottom is equipped with the spiral pipe, and the export of spiral pipe is tangent with the interior circle of hanger, and the export of spiral pipe is coaxial with the furnace body, and the bottom of furnace body is equipped with the inlet port, still is equipped with the circulating fan who is located the furnace body outside, is connected with the air-supply line between circulating fan's import and the spiral pipe, is connected with the exhaust pipe between circulating fan's export and the inlet port.

2. The treatment furnace for increasing the preheating speed of QPQ parts according to claim 1, wherein: the furnace body outside is equipped with the heat preservation, the heat preservation adopts insulating brick to build.

3. The treatment furnace for increasing the preheating speed of QPQ parts according to claim 2, wherein: the exhaust pipe is embedded in the heat insulation layer.

4. The treatment furnace for increasing the preheating speed of QPQ parts according to claim 1, wherein: the furnace cover is provided with heat preservation cotton, a middle cavity is arranged in the furnace cover, and the spiral pipe and the air inlet pipe are respectively communicated with the middle cavity.

5. The treatment furnace for increasing the preheating speed of QPQ parts according to claim 1, wherein: the spiral tube is fixed on the inner wall of the mounting cover.

6. The treatment furnace for increasing the preheating speed of QPQ parts according to claim 1, wherein: the bottom of the furnace body is fixed with a limiting ring positioned inside the furnace body, and the inner diameter of the limiting ring is larger than the outer diameter of the bottom of the hanging tool.

7. The treatment furnace for increasing the preheating speed of QPQ parts according to claim 6, wherein: the air inlet is positioned between the limiting ring and the inner wall of the furnace body.

8. The treatment furnace for increasing the preheating speed of QPQ parts according to claim 7, wherein: the air inlet is equipped with a plurality of, and a plurality of air inlet distributes along the circumference of furnace body equidistant.

9. The treatment furnace for increasing the preheating speed of QPQ parts according to claim 1, wherein: the furnace cover is characterized by further comprising a frame located above the furnace cover, a hydraulic cylinder is arranged on the frame, a hydraulic rod of the hydraulic cylinder is fixed to the top of the furnace cover, and the air inlet pipe is a stainless steel corrugated pipe.