Rapid air cooling system of large vacuum high-pressure gas quenching equipment

Abstract

The utility model belongs to the technical field of air cooling systems of vacuum heat treatment equipment, and particularly relates to a rapid air cooling system of large vacuum high-pressure gas quenching equipment. The rapid air cooling device comprises a plurality of sets of rapid air cooling systems which are respectively connected with a plurality of sections of furnace bodies of the gas quenching equipment, each rapid air cooling system comprises an air cooling heat exchange assembly, an air inlet of each air cooling heat exchange assembly is connected with an air inlet pipe assembly, an air outlet of each air cooling heat exchange assembly is connected with an air outlet pipe assembly, and the air inlet pipe assemblies and the air outlet pipe assemblies are connected with the furnace bodies; the air cooling heat exchange assembly comprises an air cooling shell, a heat exchanger set is arranged in the air cooling shell, an air cooling motor is arranged in the air cooling shell, the air cooling motor is connected with an impeller, a fan shell is arranged on the outer side of the impeller, the fan shell is connected with the heat exchanger set through an air guide barrel, and the fan shell is connected with the air outlet pipe assembly through an air collecting barrel via an air outlet. Aiming at an ultra-long heating furnace body of large-scale gas quenching equipment, a multi-set external circulation airflow multiple cooling technology is adopted, so that the effect of quickly and uniformly cooling a workpiece is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the air cooling system technical field of vacuum heat treatment equipment, specifically relates to a large -scale vacuum high pressure gas quenching equipment quick air cooling system. BACKGROUND

[0002] Vacuum high pressure gas quenching is an advanced basic process using high pressure inert gas as cooling medium to cool workpiece quickly, which has the advantages of good quenching uniformity, small workpiece deformation, high surface finish and high production efficiency, and is one of the core processes for manufacturing key components of high-end equipment. The cooling technology used by the quick air cooling system, as the core functional module of the vacuum high pressure gas quenching equipment, is crucial to ensure the heat treatment process production efficiency of the entire vacuum high pressure gas quenching equipment and the workpiece organization performance.

[0003] When existing vacuum high pressure gas quenching equipment processes super-long pipe fittings and multiple thin-walled cylindrical pipe fittings, the heat treatment deformation of the high pressure gas quenching heat treatment process is usually difficult to control. Vacuum high pressure gas quenching generally adopts 360° air cooling along the circumferential direction, one-way air cooling of airflow, and up-and-down alternating air cooling of airflow. The 360° air cooling along the circumferential direction easily causes the cooling speed of the outer edge workpiece to be fast and the cooling speed of the inner center workpiece to be slow. The one-way air cooling of airflow easily causes the cooling speed of the workpiece along the direction of the cooling airflow to be uneven. The up-and-down alternating air cooling of airflow also has the problem of slow cooling speed of the middle part of the workpiece and fast cooling speed of the two ends. These cooling methods all easily cause the organization and performance of the two sides of a single workpiece and the space between multiple workpieces to be uneven, resulting in poor hardness uniformity of the workpiece and large thermal stress deformation. SUMMARY

[0004] In view of the above technical problems, the purpose of the utility model is to overcome the shortcomings of the prior art and provide a quick air cooling system for large-scale vacuum high pressure gas quenching equipment. The quick air cooling system of the utility model adopts multiple sets of external circulation airflow multi-cooling technology. Based on the air cooling system of the general vacuum high pressure gas quenching furnace, structural innovation is made for the "super-long" heating chamber of the large-scale vacuum high pressure gas quenching equipment to ensure the heat exchange effect and achieve the rapid and uniform cooling of the workpiece at the same cooling speed.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme. The utility model is adapted to large-scale vacuum high pressure gas quenching equipment and includes multiple sets of quick air cooling systems connected to multiple furnace bodies of the gas quenching equipment. The quick air cooling system includes an air cooling heat exchange assembly, an air inlet of the air cooling heat exchange assembly is connected to an air inlet pipe assembly, an air outlet of the air cooling heat exchange assembly is connected to an air outlet pipe assembly, and the air inlet pipe assembly and the air outlet pipe assembly are connected to the furnace body.

[0006] The air-cooled heat exchange assembly comprises an air-cooled shell, an air inlet and an air outlet are arranged on the air-cooled shell, a heat exchanger group is arranged at one end of the air-cooled shell close to the air inlet, a water inlet and discharge assembly is arranged on the upper portion of the air-cooled shell, a water outlet and discharge assembly is arranged on the lower portion of the air-cooled shell, the water inlet and discharge assembly and the water outlet and discharge assembly are connected with the heat exchanger group, the water inlet and discharge assembly and the water outlet and discharge assembly correspond to the heat exchanger group in position, an air-cooled motor is arranged at one end of the air-cooled shell away from the air inlet, an impeller is connected with the output shaft of the air-cooled motor, a volute-shaped fan shell is arranged outside the impeller, the fan shell is connected with the heat exchanger group through a wind guide pipe, and the fan shell is connected with an air outlet pipe assembly through a wind collecting pipe and the air outlet.

[0007] As a preferred scheme of the utility model, the impeller is connected with the output shaft of the air-cooled motor through a gland and a caliper screw.

[0008] As another preferred scheme of the utility model, the air inlet pipe assembly is a three-in-one air inlet pipe, the three-in-one air inlet pipe is provided with three air inlet pipes connected with the furnace body, the air outlet pipe assembly is a three-in-one air outlet pipe, and the three-in-one air outlet pipe is provided with three air outlet pipes connected with the furnace body.

[0009] As a third preferred scheme of the utility model, the wind guide pipe is connected with the fan shell through a welding ring.

[0010] As a fourth preferred scheme of the utility model, the heat exchanger group is a multi-layer annular heat exchanger structure, comprising a plurality of uniformly arranged heat exchangers, a single heat exchanger is a finned copper pipe extrusion structure, the copper pipes of the heat exchanger are connected in parallel with each other and with the water inlet and discharge assembly and the water outlet and discharge assembly.

[0011] The utility model discloses the beneficial effect:

[0012] 1, the utility model discloses that the forced air duct type circulation cooling is carried out to air-cooled motor, guarantees the gas flow even in hearth, and the effective air-cooled motor and impeller ratio are used, the maximum air volume is provided while guaranteeing the cost control;

[0013] 2, the cooling rhythm is accelerated through the size and the flow area of heat exchanger are increased, the heat exchanger is also modular design, increases the heat exchange area, does not increase the volume of single heat exchanger, installs the single heat exchanger one by one and arranges, improves interchangeability and reduces installation difficulty;

[0014] 3, the whole cooling process can cooperate with multiple sensors, and the central control computer carries out automatic control according to time, temperature, pressure, cooling speed and cooling requirement, realizes multiple cooling modes such as furnace cooling, air charging furnace cooling and constant speed cooling. DRAWINGS

[0015] Figure 1The utility model discloses a whole structure schematic diagram.

[0016] Figure 2 The utility model discloses a single set of quick air cooling system structure schematic diagram.

[0017] Figure 3 It is wind -cooled heat exchange system component structure schematic diagram.

[0018] Figure 4 It is the outside circulation air -blast cooling airflow flow direction schematic diagram of the utility model.

[0019] Figure 5 It is the outside circulation air -blast cooling along the airflow flow direction schematic diagram of fan casing and wind collecting cylinder.

[0020] In the drawing, 1 is wind -cooled heat exchange assembly, 2 is air inlet pipe assembly, 3 is air outlet pipe assembly,

[0021] 11 is wind -cooled casing, 12 is wind -cooled motor, 13 is gland, 14 is calliper screw, 15 is fan casing, 16 is impeller, 17 is welding ring, 18 is air guide cylinder, 19 is heat exchanger group, 110 is water inlet exhaust assembly, 111 is water outlet exhaust assembly, 112 is wind collecting cylinder. Specific implementation

[0022] The utility model discloses following specific scheme, the utility model is adapted to large -scale vacuum high -pressure gas quenching equipment, including multiple sets with the quick air cooling system of multiple section furnace body of gas quenching equipment is connected respectively, quick air cooling system includes wind -cooled heat exchange assembly 1, and the air inlet of wind -cooled heat exchange assembly 1 is connected with air inlet pipe assembly 2, and the air outlet of wind -cooled heat exchange assembly 1 is connected with air outlet pipe assembly 3, and air inlet pipe assembly 2 and air outlet pipe assembly 3 are connected with furnace body;

[0023] The wind -cooled heat exchange assembly 1 including wind -cooled casing 11 is provided with air inlet and air outlet on wind -cooled casing 11, is provided with heat exchanger group 19 in wind -cooled casing 11 near one end of air inlet, is provided with water inlet exhaust assembly 110 on the upper portion of wind -cooled casing 11, is provided with water outlet exhaust assembly 111 on the lower portion of wind -cooled casing 11, water inlet exhaust assembly 110 and water outlet exhaust assembly 111 are connected with heat exchanger group 19, water inlet exhaust assembly 110 and water outlet exhaust assembly 111 are corresponding with heat exchanger group 19 position, is provided with wind -cooled motor 12 in wind -cooled casing 11 away from one end of air inlet, and the output shaft of wind -cooled motor 12 is connected with impeller 16, and wind -cooled motor 12 drives impeller 16 to rotate, provides air inlet power, drives hot air from furnace body to enter wind -cooled heat exchange assembly 1, and impeller 16 is centrifugal impeller, and the outside of impeller 16 is provided with volute fan casing 15, and fan casing 15 is connected with heat exchanger group 19 through air guide cylinder 18, and fan casing 15 is connected with air outlet pipe assembly 3 through wind collecting cylinder 112 through air outlet, and fan casing 15 plays the role of wind collection, guidance, collects cold air flow and guides it to blow to wind collecting cylinder 112.

[0024] As a preferred scheme of the utility model, the impeller 16 is connected with the output shaft of the air-cooled motor 12 through the gland 13 and the caliper screw 14, and the transverse movement of the impeller 16 in the working process is prevented.

[0025] As another preferred scheme of the utility model, the air inlet pipe assembly 2 is a three-in-one air inlet pipe, the three-in-one air inlet pipe is provided with three air inlet pipes connected with the furnace body, the air outlet pipe assembly 3 is a three-in-one air outlet pipe, the three-in-one air outlet pipe is provided with three air outlet pipes connected with the furnace body; the hot air flow can be quickly discharged from the furnace body through the three-in-one air inlet pipe, the cooling air flow can quickly enter the furnace body through the three-in-one air outlet pipe and blow to the workpiece, so that the workpiece is quickly cooled; meanwhile, the pipe connection size of the air outlet pipe assembly 3 is greater than that of the air inlet pipe assembly 2, so that the cooling speed is accelerated and the cost is saved.

[0026] As a third preferred scheme of the utility model, the air guide cylinder 18 is connected with the fan shell 15 through the welding ring 17.

[0027] As a fourth preferred scheme of the utility model, the heat exchanger group 19 is a multi-layer annular heat exchanger structure, comprising a plurality of uniformly arranged heat exchangers, a single heat exchanger is a finned copper pipe extrusion structure, the copper pipes of the heat exchanger are connected in parallel with each other and with the water inlet and outlet assembly 110 and 111; the flow area of the heat exchanger is increased by reasonable change, the cooling speed is accelerated, and a partition plate is arranged between the plurality of heat exchangers for airflow guiding.

[0028] The whole air cooling system can be automatically controlled according to the working time, working temperature, working pressure, real-time working condition, working cooling speed and working cooling requirement through the central control computer matched with various sensors, realizes various cooling modes such as furnace cooling, air charging furnace cooling and constant speed cooling of the workpiece, and meets the various working condition requirements under various working modes.

[0029] As shown in Figures 1-5 The specific working principle of the utility model is as follows: the air-cooled motor 12 drives the impeller 16 to rotate, the hot air flow in the furnace body is extracted, the hot air flow enters the air-cooled heat exchange assembly 1 through the air inlet of the air inlet pipe assembly 1, the hot air flow is cooled to cold air flow by the heat exchanger group 19, and the cold air flow is sequentially sent into the furnace body through the air guide cylinder 18, the fan shell 15, the air collecting cylinder 112 and the air outlet pipe assembly 3, so that the workpiece in the furnace body is quickly and uniformly cooled in a circulating and reciprocating manner.

[0030] It can be understood that the above specific description of the utility model is only used for illustrating the utility model and is not limited to the technical scheme described in the utility model embodiment, and the person skilled in the art should understand that the utility model can still be modified or equivalently replaced to achieve the same technical effect, as long as the use needs are met, it is within the protection scope of the utility model.

Claims

1. A rapid air-cooling system for large-scale vacuum high-pressure gas quenching equipment, characterized in that, The system includes multiple sets of rapid air cooling systems that are connected to the multi-section furnace body of the gas quenching equipment. The rapid air cooling system includes an air cooling heat exchange component (1), the air inlet of the air cooling heat exchange component (1) is connected to the air inlet pipe component (2), the air outlet of the air cooling heat exchange component (1) is connected to the air outlet pipe component (3), and the air inlet pipe component (2) and the air outlet pipe component (3) are connected to the furnace body. The air-cooled heat exchange assembly (1) includes an air-cooled shell (11), on which an air inlet and an air outlet are provided. A heat exchanger assembly (19) is provided at one end of the air-cooled shell (11) near the air inlet. A water inlet assembly (110) is provided on the upper part of the air-cooled shell (11), and a water outlet assembly (111) is provided on the lower part of the air-cooled shell (11). The water inlet assembly (110) and the water outlet assembly (111) are connected to the heat exchanger assembly (19). 10) and the water outlet assembly (111) are positioned corresponding to the heat exchanger group (19). An air-cooled motor (12) is installed at the end of the air-cooled housing (11) away from the air inlet. The output shaft of the air-cooled motor (12) is connected to an impeller (16). A volute-shaped fan housing (15) is installed on the outside of the impeller (16). The fan housing (15) is connected to the heat exchanger group (19) through the air guide tube (18). The fan housing (15) is connected to the air outlet assembly (3) through the air collection tube (112) and the air outlet.

2. The rapid air-cooling system for a large-scale vacuum high-pressure gas quenching equipment as described in claim 1, characterized in that, The impeller (16) is connected to the output shaft of the air-cooled motor (12) via a gland (13) and a caliper screw (14).

3. The rapid air-cooling system for a large-scale vacuum high-pressure gas quenching equipment as described in claim 1, characterized in that, The air inlet pipe assembly (2) is a three-in-one air inlet pipe, which is provided with three air inlet pipes connected to the furnace body. The air outlet pipe assembly (3) is a three-in-one air outlet pipe, which is provided with three air outlet pipes connected to the furnace body.

4. The rapid air-cooling system for large-scale vacuum high-pressure gas quenching equipment as described in claim 1, characterized in that, The air guide tube (18) is connected to the fan casing (15) via a welding ring (17).

5. The rapid air-cooling system for a large-scale vacuum high-pressure gas quenching equipment as described in claim 1, characterized in that, The heat exchanger group (19) is a multi-layer annular heat exchanger structure, including multiple uniformly arranged heat exchangers. Each heat exchanger is a finned copper tube extrusion structure. The copper tubes of the heat exchangers are connected in parallel to each other and connected to the inlet drain assembly (110) and the outlet drain assembly (111).

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