CN218404368U - Automatic exhaust device of well type gas nitriding furnace - Google Patents
Automatic exhaust device of well type gas nitriding furnace Download PDFInfo
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- CN218404368U CN218404368U CN202222718082.6U CN202222718082U CN218404368U CN 218404368 U CN218404368 U CN 218404368U CN 202222718082 U CN202222718082 U CN 202222718082U CN 218404368 U CN218404368 U CN 218404368U
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- inlet pipe
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- air inlet
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Abstract
The utility model discloses an automatic exhaust device of a well type gas nitriding furnace, which belongs to the field of gas nitriding equipment and comprises a vertical intake pipe, wherein the vertical intake pipe is arranged on a well head cover of the nitriding furnace; an elbow is arranged at the upper end of the vertical air inlet pipe, a transverse inclined air inlet pipe is arranged at the other end of the elbow, and the transverse inclined air inlet pipe is arranged obliquely downwards along the exhaust direction; the air outlet end of the transverse inclined air inlet pipe is connected with a water storage tank below, the bottom of the water storage tank is provided with a water outlet, the air outlet end of the transverse inclined air inlet pipe is connected with a vertical spiral coil pipe above, an air outlet at the top of the vertical spiral coil pipe is connected with a main exhaust pipeline, and a proportion adjusting valve is arranged on the main exhaust pipeline. The utility model discloses an above-mentioned structure has not only preserved the functionality of well formula gas nitriding furnace tradition exhaust system, has also successfully solved the product and has caused the unusual problem of product thermal treatment technical index and appearance quality because of liquid water backward flow.
Description
Technical Field
The utility model relates to a gaseous nitriding apparatus field, concretely relates to automatic exhaust apparatus of gaseous nitriding furnace of well formula.
Background
In enterprises in the heat treatment industry, heat treatment equipment of a well type gas nitriding furnace is generally configured, and the used process is different according to different product design technical requirements and different use working conditions. The general surface modification heat treatment process comprises hard nitriding, nitrocarburizing, nitriding and post-oxidizing respectively, and gaseous water is easily generated in the atmosphere in a well type gas nitriding furnace in the nitrocarburizing and nitriding and post-oxidizing heat treatment processes.
As shown in fig. 2, the gaseous water generated in the well-type gas nitriding furnace is condensed into liquid water in the process of being discharged out of the furnace through the exhaust system of the well-type gas nitriding furnace, and the condensed liquid water flows back into the well-type gas nitriding furnace along the exhaust system to cause local oxidation to the product, thereby finally influencing the technical index and the appearance quality of the heat treatment of the product.
To the problems existing in the prior art, the utility model discloses an automatic exhaust device of a well type gas nitriding furnace is designed and manufactured to overcome the defects.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a pair of automatic exhaust apparatus of well formula gas nitriding furnace has not only preserved well formula gas nitriding furnace tradition exhaust system's functionality, has also successfully solved the product and has caused product thermal treatment technical index and appearance quality unusual problem because of liquid water backward flow.
In order to realize the purpose, the utility model discloses a technical scheme as follows: an automatic exhaust device of a well type gas nitriding furnace comprises a vertical air inlet pipe, wherein the vertical air inlet pipe is arranged on a well head cover of the nitriding furnace;
an elbow is arranged at the upper end of the vertical air inlet pipe, a transverse inclined air inlet pipe is arranged at the other end of the elbow, and the transverse inclined air inlet pipe is arranged obliquely downwards along the exhaust direction;
the air outlet end of the transverse inclined air inlet pipe is connected with a water storage tank below, a water outlet is formed in the bottom of the water storage tank, a vertical spiral coil pipe is connected to the air outlet end of the transverse inclined air inlet pipe above, a main exhaust pipeline is connected to an air outlet at the top of the vertical spiral coil pipe, and a proportional control valve is arranged on the main exhaust pipeline.
Preferably, the included angle between the transverse inclined air inlet pipe and the horizontal plane is 5-10 degrees.
Preferably, the vertical air inlet pipe, the elbow and the transverse inclined air inlet pipe are integrally formed.
Preferably, the proportional control valve is connected with a pressure sensor and a control instrument, and the control instrument controls the opening of the proportional control valve through PID (proportion integration differentiation) so as to control the pressure in the pit-type gas nitriding furnace.
Preferably, the automatic exhaust system further comprises a manual ball valve and an auxiliary exhaust pipeline, wherein the manual ball valve is arranged on the auxiliary exhaust pipeline, and the auxiliary exhaust pipeline provided with the manual ball valve is connected with the main exhaust pipeline provided with the proportion regulating valve in parallel.
Preferably, the vertical spiral coil is the same diameter as the main exhaust duct.
Preferably, the diameters of the vertical air inlet pipe and the transverse inclined air inlet pipe are larger than the diameters of the vertical spiral coil pipe and the diameter of the main exhaust pipeline.
Preferably, the diameter of the vertical spiral coil is 40mm, the pitch of the vertical spiral coil is 350-450mm, and the vertical spiral coil is provided with 4-6 circles.
Preferably, the water outlet is provided with a switch valve.
Preferably, the distance between the exhaust port of the main exhaust pipeline and the proportional regulating valve is not less than 400mm.
The utility model discloses an useful part lies in:
1. the utility model discloses vertical intake pipe end sets up the elbow and connects the transverse inclination intake pipe for in the liquid water that the condensation becomes gets into the cistern of transverse inclination intake pipe below, liquid water direct reflux to the gaseous nitriding furnace of well formula after having avoided traditional vertical spiral coil condensation, guaranteed product thermal treatment technical index and appearance quality.
2. The utility model discloses a set up proportional control valve to be connected with pressure sensor and control instrument, proportional control valve sets for the pressure contrast according to actual pressure in the stove with control instrument, through the PID control automatically regulated valve aperture of control instrument, pressure in the control stove has improved the security.
Drawings
FIG. 1 is a schematic view of an automatic exhaust device of a pit-type gas nitriding furnace according to the present invention;
FIG. 2 is a schematic view of an automatic exhaust apparatus of a conventional shaft type gas nitriding furnace.
In the figure: 1-vertical air inlet pipe, 2-horizontal inclined air inlet pipe, 3-vertical spiral coil pipe, 4-proportion regulating valve, 5-auxiliary exhaust pipeline, 6-manual ball valve, 7-main exhaust pipeline, 8-water storage tank, 9-switch valve and 10-well cover.
Detailed Description
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
As shown in figure 1, an automatic exhaust device of gaseous nitriding furnace of well formula, including vertical intake pipe 1, vertical intake pipe 1 sets up on the well head lid 10 of nitriding furnace, is different from traditional structure lug connection gas cooling device, the utility model discloses 1 upper end of vertical intake pipe is equipped with the elbow, and the elbow other end is equipped with horizontal tilt intake pipe 2, and horizontal tilt intake pipe 2 sets up downwards along the exhaust direction slope, and horizontal tilt intake pipe 2 is 5-10 with the contained angle of horizontal plane, and the end top of giving vent to anger of horizontal tilt intake pipe 2 is connected with vertical spiral coil 3, and is connected with water storage box 8 below the end of giving vent to anger of horizontal tilt intake pipe 2, and water storage box 8 bottom is equipped with the delivery port, and the delivery port is equipped with ooff valve 9.
High-temperature gas enters the vertical spiral coil 3 for condensation after passing through the vertical air inlet pipe 1 and the transverse inclined air inlet pipe 2, wherein condensed liquid water does not enter the nitriding furnace through the vertical air inlet pipe 1 due to the transverse inclined air inlet pipe 2, but enters the water storage tank 8, and the liquid water in the water storage tank 8 is removed through the water outlet periodically, so that the technical index and the appearance quality of product heat treatment are indirectly ensured.
The utility model discloses the gas outlet at 3 tops of vertical spiral coil is connected with main exhaust duct 7, be equipped with proportional control valve 4 on the main exhaust duct 7, proportional control valve 4 is connected with pressure sensor and control instrument, proportional control valve 4 sets for the pressure contrast with control instrument according to the interior actual pressure of stove, through the aperture of PID control proportional control valve 4 of control instrument, and then control well type gas nitriding furnace internal pressure, main exhaust duct 7's gas vent is not less than 400mm apart from proportional control valve 4 to guarantee the stability of pressure. In addition still include manual ball valve 6 and supplementary exhaust duct 5, manual ball valve 6 sets up on supplementary exhaust duct 5, and supplementary exhaust duct 5 that is equipped with manual ball valve 6 is parallelly connected with main exhaust duct 7 that is equipped with proportion control valve 4, and manual ball valve 6 is supplementary exhaust, and when proportion control valve 4 is unusual or the governing speed is slow, the manual exhaust of accessible manual ball valve 6.
The utility model discloses vertical intake pipe 1, elbow and 2 integrated into one piece of transverse inclination intake pipe, and vertical spiral coil 3 is the same with main exhaust duct 7's diameter, and vertical intake pipe 1 and transverse inclination intake pipe 2's diameter preferred is greater than vertical spiral coil 3 and main exhaust duct 7's diameter, guarantees automatic exhaust apparatus's internal pressure.
The diameter of vertical spiral coil 3 is 40mm, the pitch of vertical spiral coil 3 is 350-450mm, vertical spiral coil 3 is equipped with 4-6 circles, spiral coil 4, when high-temperature gas passes through, gas temperature and ambient temperature differ greatly, through the heat transfer, the spiral coil dispels the heat, make the circulating gas reach the effect of cooling, in addition, spiral coil plays the effect of protection spiral coil top proportional control valve 4 and manual ball valve 6 to the circulating gas cooling, avoid the damage influence of high-temperature gas proportional control valve 4 and manual ball valve 6.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes, modifications and/or alterations to the present invention may be made by those skilled in the art after reading the technical disclosure of the present invention, and all such equivalents may fall within the scope of the present invention as defined by the appended claims.
Claims (10)
1. The automatic exhaust device of the pit-type gas nitriding furnace is characterized by comprising a vertical air inlet pipe, wherein the vertical air inlet pipe is arranged on a wellhead cover of the nitriding furnace;
an elbow is arranged at the upper end of the vertical air inlet pipe, a transversely inclined air inlet pipe is arranged at the other end of the elbow, and the transversely inclined air inlet pipe is obliquely arranged downwards along the exhaust direction;
the air outlet end of the transverse inclined air inlet pipe is connected with a water storage tank below, the bottom of the water storage tank is provided with a water outlet, the air outlet end of the transverse inclined air inlet pipe is connected with a vertical spiral coil pipe above, an air outlet at the top of the vertical spiral coil pipe is connected with a main exhaust pipeline, and a proportion adjusting valve is arranged on the main exhaust pipeline.
2. The automatic exhaust device of the pit-type gas nitriding furnace according to claim 1, wherein the angle between the transversely inclined inlet pipe and the horizontal plane is 5-10 °.
3. The automatic exhaust device of the pit-type gas nitriding furnace according to claim 1, wherein the vertical inlet pipe, the elbow and the transversely inclined inlet pipe are integrally formed.
4. The automatic exhaust device of the pit-type gas nitriding furnace according to claim 1, wherein the proportional control valve is connected with a pressure sensor and a control instrument, and the control instrument controls the opening degree of the proportional control valve through PID so as to control the pressure in the pit-type gas nitriding furnace.
5. The automatic exhaust device of the pit-type gas nitriding furnace according to claim 1, further comprising a manual ball valve and an auxiliary exhaust pipe, wherein the manual ball valve is arranged on the auxiliary exhaust pipe, and the auxiliary exhaust pipe provided with the manual ball valve is connected in parallel with the main exhaust pipe provided with the proportional control valve.
6. The automatic exhaust device of the shaft type gas nitriding furnace according to claim 1, wherein the vertical spiral coil and the main exhaust pipeline have the same diameter.
7. The automatic exhaust device of the shaft-type gas nitriding furnace according to claim 6, wherein the diameters of the vertical air inlet pipe and the transverse inclined air inlet pipe are larger than the diameters of the vertical spiral coil pipe and the main exhaust pipeline.
8. The automatic exhaust device of the shaft-type gas nitriding furnace according to claim 1, wherein the diameter of the vertical spiral coil is 40mm, the pitch of the vertical spiral coil is 350-450mm, and the vertical spiral coil is provided with 4-6 turns.
9. The automatic exhaust device of the pit-type gas nitriding furnace according to claim 1, wherein the water outlet is provided with an on-off valve.
10. The automatic exhaust device of the pit-type gas nitriding furnace according to claim 1, wherein the distance between the exhaust port of the main exhaust pipe and the proportional control valve is not less than 400mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222718082.6U CN218404368U (en) | 2022-10-14 | 2022-10-14 | Automatic exhaust device of well type gas nitriding furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222718082.6U CN218404368U (en) | 2022-10-14 | 2022-10-14 | Automatic exhaust device of well type gas nitriding furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218404368U true CN218404368U (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222718082.6U Active CN218404368U (en) | 2022-10-14 | 2022-10-14 | Automatic exhaust device of well type gas nitriding furnace |
Country Status (1)
| Country | Link |
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| CN (1) | CN218404368U (en) |
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2022
- 2022-10-14 CN CN202222718082.6U patent/CN218404368U/en active Active
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