Well type severe convection spheroidizing annealing furnace

Abstract

The utility model relates to the technical field of annealing furnaces, and discloses a well type severe convection spheroidizing annealing furnace which comprises an annealing furnace body, the top of the annealing furnace body is fixedly connected with a smoke outlet pipe, the outside of the smoke outlet pipe is fixedly connected with an air inlet cover, the top end of the outside of the air inlet cover is fixedly connected with a connecting pipe opening, and the connecting pipe opening is fixedly connected with an air inlet pipe. An air inlet pipe is fixedly connected to the side, away from the air inlet cover, of the connecting pipe opening, a fixing seat is fixedly connected to the exterior of the annealing furnace body, a fan is fixedly connected to the interior of the fixing seat, a mounting cover is fixedly connected to the exterior of the fixing seat, and the mounting cover is away from the annealing furnace body. According to the utility model, the temperature of the inlet gas can be increased by utilizing the temperature of the tail gas in the furnace, so that the temperature in the furnace is not influenced, the product quality is not influenced, and meanwhile, hot air in the furnace can be convected and circulated by utilizing the circulating air pipe, so that the temperature in the furnace is consistent, the temperature deviation in the furnace is not caused, and the product quality is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of annealing furnaces, in particular to a well-type strong convection spheroidizing annealing furnace. Background Art

[0002] Spheroidizing annealing furnace is mainly suitable for heat treatment of eutectoid steel and hypereutectoid steel workpieces such as carbon tool steel, alloy tool steel, bearing steel, etc. Spheroidizing annealing in a spheroidizing annealing furnace results in spheroidal pearlite structure, in which cementite is in the form of spherical particles dispersed in the ferrite matrix. Compared with lamellar pearlite, it not only has lower hardness and is easier to cut, but also the austenite grains are not easy to grow during quenching and heating, and the workpiece has less tendency to deform and crack during cooling.

[0003] After searching, Chinese patent announcement number CN219010388U discloses a spheroidizing annealing furnace, including an annealing furnace body and a heat dissipation hole, an electric door is provided inside the heat dissipation hole, a storage slot is provided at the bottom of the electric door, an electric telescopic rod is provided inside the storage slot, the output end of the electric telescopic rod is fixedly connected to the electric door, a heat dissipation box is provided on one side of the heat dissipation hole, and a cooling plate is provided inside the heat dissipation box. The patent realizes the rapid heat dissipation function of the annealing furnace, thereby realizing rapid cooling of the workpiece, effectively improving work efficiency, and providing convenience for the opening and closing of the top cover, without manual opening, saving time and effort. However, the waste heat of the tail gas in the spheroidizing annealing furnace in the patent cannot be utilized, resulting in a waste of resources. At the same time, the temperature of the incoming air is room temperature, which is lower than the temperature in the furnace, resulting in a deviation in the temperature of the furnace every time the air is introduced, which in turn affects the product quality. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a pit-type strong convection spheroidizing annealing furnace, which aims to improve the problem that the waste heat of tail gas cannot be utilized, resulting in waste of resources, and the temperature of the inlet air is room temperature, which may easily cause the temperature in the furnace to deviate, thereby affecting the product quality.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a well-type strong convection spheroidizing annealing furnace, comprising an annealing furnace body, the top of the annealing furnace body is fixedly connected with a smoke outlet pipe, the outside of the smoke outlet pipe is fixedly connected with an air inlet hood, the outer top of the air inlet hood is fixedly connected with a connecting pipe mouth, the side of the connecting pipe mouth away from the air inlet hood is fixedly connected with the air inlet pipe, the outside of the annealing furnace body is fixedly connected with a fixing seat, the inside of the fixing seat is fixedly connected with a fan, the outside of the fixing seat is fixedly connected with a mounting cover, the side of the mounting cover away from the annealing furnace body is fixedly connected with a circulating air duct, the side of the circulating air duct close to the air inlet hood is fixedly connected to the side of the air inlet duct away from the air inlet hood, the outer bottom end of the air inlet hood is fixedly connected with an air inlet, and the outer bottom end of the smoke outlet pipe is fixedly connected with a connecting mechanism.

[0006] As a further description of the above technical solution:

[0007] The connecting mechanism includes a fixed tube and an outer tube, wherein the side of the fixed tube close to the annealing furnace body is fixedly connected to the outside of the smoke outlet pipe, and the side of the fixed tube away from the smoke outlet pipe is fixedly connected to a fixed shell, a plurality of clamping springs are fixedly connected inside the fixed shell, a sealing sliding plate is slidably connected inside the fixed shell, a plurality of clamping springs are fixedly connected between the fixed shell and the sealing sliding plate, two slots are provided inside the fixed shell, and a plurality of ears are fixedly connected to the outside of the outer tube, and the ears are engaged with the slots.

[0008] As a further description of the above technical solution:

[0009] The bottom of the air inlet cover is fixedly connected with a bottom plate, and the side of the circulating air duct away from the fixing seat is fixedly connected to the other end outside the furnace body of the annealing furnace.

[0010] As a further description of the above technical solution:

[0011] The bottoms of the plurality of the tightening springs are all fixedly connected to the top of the sealing sliding plate, and a vent hole is provided in the middle of the sealing sliding plate.

[0012] As a further description of the above technical solution:

[0013] The two clamping grooves are centrally and symmetrically distributed inside the fixed shell, and the two clamping ears are symmetrically distributed outside the outer tube.

[0014] As a further description of the above technical solution:

[0015] The outside of the fixed pipe passes through the outside of the air inlet cover, and the air inlet is connected to the air inlet cover.

[0016] As a further description of the above technical solution:

[0017] The connecting pipe opening is connected to the interior of the air inlet cover, and a sealing ring is fixedly connected to the bottom of the sealing sliding plate.

[0018] As a further description of the above technical solution:

[0019] The outer part of the sealing sliding plate is covered with a rubber sleeve, and one side of the fixed shell located at the fixed pipe is provided with a hole.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the utility model, by using the smoke outlet pipe, air inlet hood, fixing seat, fan, mounting hood and circulating air duct and other structures, it is achieved that the temperature of the exhaust gas in the furnace can be used to heat the intake air, so that the temperature in the furnace will not be affected, and then the product quality will not be affected. At the same time, the circulating air duct can be used to make the hot air in the furnace convect and circulate, so that the temperature in the furnace is consistent, and the temperature deviation in the furnace will not be caused, thereby improving the product quality.

[0022] 2. In the utility model, by means of the fixed tube, the sealing sliding plate, the tightening spring, the slot and the ear structure, the annealing furnace can be quickly connected to the external pipeline, thereby facilitating the discharge of exhaust gas, and the external pipeline can be quickly replaced after being damaged, without delaying the use of the annealing furnace, and then the production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional diagram of a pit-type strong convection spheroidizing annealing furnace proposed by the utility model;

[0024] Figure 2 A schematic diagram of a fan in a pit-type strong convection spheroidizing annealing furnace proposed by the utility model;

[0025] Figure 3 This is a cross-sectional view of an air inlet hood in a pit-type strong convection spheroidizing annealing furnace proposed by the utility model;

[0026] Figure 4 It is a cross-sectional view of a fixed shell in a pit-type strong convection spheroidizing annealing furnace proposed by the utility model;

[0027] Figure 5 The utility model provides a schematic diagram of the ear in a pit-type strong convection spheroidizing annealing furnace.

[0028] Legend:

[0029] 1. Annealing furnace body; 2. Smoke exhaust pipe; 3. Air inlet hood; 4. Air inlet pipe; 5. Fixed seat; 6. Fan; 7. Mounting cover; 8. Circulating air duct; 9. Air inlet; 10. Connecting mechanism; 1001. Fixed pipe; 1002. Sealing sliding plate; 1003. Tightening spring; 1004. Slot; 1005. Outer pipe; 1006. Ear; 1007. Fixed shell; 11. Connecting pipe mouth; 12. Bottom plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Reference Figure 1-3 The utility model provides an embodiment: a well-type strong convection spheroidizing annealing furnace, including an annealing furnace body 1, a smoke outlet pipe 2 is fixedly connected to the top of the annealing furnace body 1, the smoke outlet pipe 2 can discharge exhaust gas, the outside of the smoke outlet pipe 2 is fixedly connected to an air inlet hood 3, the air inlet hood 3 can pass the outside air, and at the same time can use the temperature of the smoke outlet pipe 2 to heat the air, the top of the outside of the air inlet hood 3 is fixedly connected to a connecting pipe mouth 11, the connecting pipe mouth 11 plays a connecting role, the side of the connecting pipe mouth 11 away from the air inlet hood 3 is fixedly connected to an air inlet pipe 4, the air inlet pipe 4 is convenient for air intake, the outside of the annealing furnace body 1 is fixedly connected to a fixing seat 5, the fixing seat 5 can provide an installation position, the inside of the fixing seat 5 is fixedly connected to a fan 6, the fan 6 can provide a position for ventilation, the outside of the fixing seat 5 The smoke exhaust pipe 2 is fixedly connected with a mounting cover 7, which can be connected to a fixing seat 5 to prevent air leakage from the fan 6. A circulating air duct 8 is fixedly connected to the side of the mounting cover 7 away from the annealing furnace body 1. The circulating air duct 8 can connect the two ends of the annealing furnace body 1, thereby realizing hot air convection of the annealing furnace body 1. The side of the circulating air duct 8 close to the air inlet cover 3 is fixedly connected to the side of the air inlet duct 4 away from the air inlet cover 3. The external bottom end of the air inlet cover 3 is fixedly connected with an air inlet port 9, which can facilitate air intake. The external bottom end of the smoke exhaust pipe 2 is fixedly connected with a connecting mechanism 10, which is convenient for connecting to external pipelines. The bottom of the air inlet cover 3 is fixedly connected with a bottom plate 12, which can provide an installation function. The side of the circulating air duct 8 away from the fixing seat 5 is fixedly connected to the other end of the outside of the annealing furnace body 1.

[0032] Reference Figure 3As shown in the figure, the connecting mechanism 10 includes a fixed tube 1001 and an outer tube 1005. The side of the fixed tube 1001 close to the annealing furnace body 1 is fixedly connected to the outside of the smoke outlet pipe 2. The side of the fixed tube 1001 away from the smoke outlet pipe 2 is fixedly connected with a rotating shell 1007. The rotating shell 1007 can provide installation conditions. A plurality of tightening springs 1003 are fixedly connected inside the rotating shell 1007. The tightening springs 1003 can have the same elastic force. The inside of the rotating shell 1007 is slidably connected with a sealing sliding plate 1002. The sealing sliding plate 1002 is fixedly connected to the rotating shell 1007. 002 can rest on the ear 1006, and a plurality of locking springs 1003 are fixedly connected between the rotating shell 1007 and the sealing sliding plate 1002. Two slots 1004 are provided inside the rotating shell 1007, and the slots 1004 can provide an installation position. A plurality of ears 1006 are fixedly connected to the outside of the outer tube 1005, and the ears 1006 are engaged with the slots 1004. The two slots 1004 are centrally symmetrically distributed inside the rotating shell 1007, and the two ears 1006 are symmetrically distributed outside the outer tube 1005.

[0033] Reference Figure 3-5 The bottoms of multiple locking springs 1003 are fixedly connected to the top of the sealing sliding plate 1002, a vent hole is opened in the middle of the sealing sliding plate 1002, the outside of the fixed pipe 1001 passes through the outside of the air inlet hood 3, the air inlet 9 is connected to the air inlet hood 3, the connecting pipe mouth 11 is connected to the inside of the air inlet hood 3, and a sealing ring is fixedly connected to the bottom of the sealing sliding plate 1002. The function of the sealing ring is to improve the sealing performance. The outer sleeve of the sealing sliding plate 1002 is provided with a rubber sleeve, and the rubber pad can provide sealing performance. A hole is opened on one side of the rotating shell 1007 located on the fixed pipe 1001.

[0034] Working principle: when air is taken in, the fan 6 is started. After the fan 6 is started, suction can be generated, so that the suction can be transmitted to the inside of the air inlet hood 3 through the air inlet pipe 4, so that the outside air can be sucked into the air inlet hood 3 through the air inlet port 9. At this time, the exhaust gas from the smoke outlet pipe 2 passes through the inside of the air inlet hood 3. Since the exhaust gas passes through the inside of the smoke outlet pipe 2, and the exhaust gas has temperature, the internal gas of the air inlet hood 3 can be heated, and then the temperature entering the annealing furnace body 1 can be kept almost the same as the temperature inside the annealing furnace body 1. When the fan 6 is sucking air, the hot air inside the annealing furnace body 1 will also enter through the circulating air duct 8 The interior of the annealing furnace body 1 can realize hot air convection inside the annealing furnace body 1, and then the temperature in the furnace can be kept the same, and then the product quality will not be affected. When replacing the external pipeline, first push the outer tube 1005 toward the inside of the rotating shell 1007, so that the sealing sliding plate 1002 can be squeezed, and then the spring 1003 can be compressed and can slide out from the shorter groove of the slot 1004. At this time, rotate counterclockwise again, so that the ear 1006 can be rotated to the longer groove of the slot 1004. At this time, the outer tube 1005 can be pulled out and rotated to the inside of the shell 1007, and then the external pipeline can be quickly replaced.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pit-type strong convection spheroidizing annealing furnace, comprising an annealing furnace body (1), characterized in that: The top of the annealing furnace body (1) is fixedly connected to a smoke outlet pipe (2), the outside of the smoke outlet pipe (2) is fixedly connected to an air inlet hood (3), the top of the outside of the air inlet hood (3) is fixedly connected to a connecting pipe port (11), the side of the connecting pipe port (11) away from the air inlet hood (3) is fixedly connected to an air inlet pipe (4), the outside of the annealing furnace body (1) is fixedly connected to a fixing seat (5), the inside of the fixing seat (5) is fixedly connected to a fan (6), the outside of the fixing seat (5) is fixedly connected to a mounting cover (7), the side of the mounting cover (7) away from the annealing furnace body (1) is fixedly connected to a circulating air duct (8), the side of the circulating air duct (8) close to the air inlet hood (3) is fixedly connected to the side of the air inlet pipe (4) away from the air inlet hood (3), the outside bottom of the air inlet hood (3) is fixedly connected to an air inlet (9), and the outside bottom of the smoke outlet pipe (2) is fixedly connected to a connecting mechanism (10).

2. A pit-type strong convection spheroidizing annealing furnace according to claim 1, characterized in that: The connection mechanism (10) comprises a fixed tube (1001) and an outer tube (1005); a side of the fixed tube (1001) close to the annealing furnace body (1) is fixedly connected to the outside of the smoke outlet pipe (2); a side of the fixed tube (1001) away from the smoke outlet pipe (2) is fixedly connected to a fixed shell (1007); a plurality of abutting springs (1003) are fixedly connected inside the fixed shell (1007); a sealing sliding plate (1002) is slidably connected inside the fixed shell (1007); a plurality of abutting springs (1003) are fixedly connected between the fixed shell (1007) and the sealing sliding plate (1002); two clamping grooves (1004) are provided inside the fixed shell (1007); a plurality of clamping ears (1006) are fixedly connected to the outside of the outer tube (1005); the clamping ears (1006) are engaged with the clamping grooves (1004).

3. A pit-type strong convection spheroidizing annealing furnace according to claim 1, characterized in that: The bottom of the air inlet cover (3) is fixedly connected to a bottom plate (12), and the side of the circulating air duct (8) away from the fixing seat (5) is fixedly connected to the other end outside the annealing furnace body (1).

4. A pit-type strong convection spheroidizing annealing furnace according to claim 2, characterized in that: The bottoms of the plurality of the holding springs (1003) are fixedly connected to the top of the sealing sliding plate (1002), and a vent hole is provided in the middle of the sealing sliding plate (1002).

5. The pit-type strong convection spheroidizing annealing furnace according to claim 2, characterized in that: The two clamping grooves (1004) are centrally symmetrically distributed inside the fixed shell (1007), and the two clamping ears (1006) are symmetrically distributed outside the outer tube (1005).

6. A pit-type strong convection spheroidizing annealing furnace according to claim 2, characterized in that: The outside of the fixed tube (1001) passes through the outside of the air inlet cover (3), and the air inlet (9) is connected to the air inlet cover (3).

7. The pit-type strong convection spheroidizing annealing furnace according to claim 2, characterized in that: The connecting pipe opening (11) is connected to the interior of the air inlet cover (3), and a sealing ring is fixedly connected to the bottom of the sealing sliding plate (1002).

8. The pit-type strong convection spheroidizing annealing furnace according to claim 2, characterized in that: The sealing sliding plate (1002) is externally sleeved with a rubber sleeve, and the fixed outer shell (1007) is provided with a hole on one side of the fixed tube (1001).

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