Cooling cover structure of bell-type furnace

Abstract

The utility model relates to a bell-type furnace cooling cover structure, which comprises a mounting bottom plate, an outer cover fixedly mounted at the top of the mounting bottom plate and an inner cover fixedly mounted at the top of the mounting bottom plate, the inner cover is positioned in the outer cover, a through hole with the same inner diameter as the inner cover is formed in the top of the mounting bottom plate, and a water collecting tank is formed in the arc-shaped top of the inner cover. According to the cooling cover structure of the bell-type furnace, the water collecting groove is formed in the arc-shaped top of the inner cover, the spiral groove is formed in the vertical surface of the inner cover from top to bottom, cooling water is sprayed to the arc-shaped top of the inner cover and flows into the spiral groove through the water collecting groove, the cooling water rotationally flows downwards along the surface of the inner cover along the spiral groove, and the downward flowing speed of the cooling water is reduced; the contact time of the cooling water and the inner cover is prolonged, and the problem that when the cooling water flows down along the outer wall of the inner cover, due to the fact that the outer wall of the inner cover is smooth, the cooling water flowing speed is high, and sufficient time is insufficient for heat exchange is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bell-type furnaces, in particular to a bell-type furnace cooling bell structure. Background Art

[0002] A bell-type furnace is a device used for local heat treatment of metal materials. Its furnace body is a bell or furnace bottom that does not move, and the bell moves, or the bell does not move, and the furnace bottom moves. Bell-type furnaces generally use nitrogen-hydrogen mixed gas as the protective medium. Compared with nitrogen, hydrogen has the advantages of good thermal conductivity, low density, low dynamic viscosity, and strong reducing properties.

[0003] Generally, a bell-type furnace is composed of a heating bell, a cooling bell, a furnace table, an inner bell and corresponding cooling, evacuation and circulating fan systems. There is a spray cooling process in the bell-type furnace annealing process. Cooling water is sprayed from the top spray device on the cooling bell to the top of the inner bell and flows down along the outer wall of the inner bell to achieve the purpose of cooling the inner bell.

[0004] The cooling hood of the bell-type furnace is an important equipment for quickly cooling the workpiece in the furnace. Its main function is to accelerate the cooling speed of the workpiece and improve the cooling efficiency by forced air flow or water spraying during the cooling process of the workpiece from high temperature, so as to obtain better heat treatment effect. The cooling hood of the bell-type furnace adopts forced air flow or water spraying to accelerate the cooling speed and improve the cooling efficiency. The cooling hood of the bell-type furnace can ensure uniform temperature distribution in the furnace through reasonable structural design. The cooling hood of the bell-type furnace has a simple structure and is easy to operate. It can be easily installed and adjusted. The cooling hood of the bell-type furnace is suitable for heat treatment of various metal materials, such as steel, non-ferrous metals, etc.

[0005] However, a common hood-type furnace cooling hood structure cools the inner hood by spraying cooling water from a top spray device on the cooling hood to the top of the inner hood and flowing down along the outer wall of the inner hood. When the cooling water flows down along the outer wall of the inner hood, due to the flat outer wall of the inner hood and the fast flow rate of the cooling water, there is not enough time for heat exchange. In view of this, the present application proposes a hood-type furnace cooling hood structure. Utility Model Content

[0006] In view of the shortcomings of the prior art, the utility model provides a hood-type furnace cooling hood structure, which has the advantages of slowing down the speed of cooling water flowing down from the inner hood surface and increasing the efficiency of heat exchange. It solves the problem that when the cooling water flows down along the outer wall of the inner hood, due to the flat outer wall of the inner hood and the fast flow rate of the cooling water, there is not enough time for heat exchange.

[0007] To achieve the above object, the utility model provides the following technical solutions: a bell-type furnace cooling hood structure, comprising a mounting base plate, an outer hood fixedly mounted on the top of the mounting base plate, and an inner hood fixedly mounted on the top of the mounting base plate, wherein the inner hood is located inside the outer hood, and a through hole having the same inner diameter as that of the inner hood is opened on the top of the mounting base plate;

[0008] The arc-shaped top of the inner cover is provided with a water collecting trough, and the surface of the inner cover is provided with a spiral groove for slowing down the speed of cooling water flowing down from the inner cover surface, and the spiral groove spirals from the top of the inner cover side wall to the bottom of the inner cover side wall.

[0009] The present application adopts the above-mentioned technical solution, through the spiral groove, so that the cooling water flows downward along the spiral groove on the surface of the inner cover, slowing down the speed of the cooling water flowing downward, increasing the contact time between the cooling water and the inner cover, and increasing the efficiency of heat exchange between the cooling water and the inner cover.

[0010] Furthermore, an air duct is fixedly installed on the top of the inner cover, and the top of the air duct is fixedly connected to the inner top wall of the outer cover, so that a sealed cooling space is formed between the installation base plate, the outer cover, the inner cover and the air duct.

[0011] The beneficial effect of adopting the above further solution is that the cooling water is sealed in the cooling space and does not flow out to cause rust on the workpiece.

[0012] Furthermore, a circulation pump is fixedly installed on the surface of the outer cover, a return pipe is fixedly installed on the input end of the circulation pump, and a spray pipe is fixedly installed on the output end of the circulation pump.

[0013] The beneficial effect of adopting the above further solution is that the circulation pump drives the cooling water to flow from the return pipe to the spray pipe.

[0014] Furthermore, the input end of the return pipe extends to the interior of the outer cover, and the input end of the return pipe is close to the top of the installation base plate.

[0015] The beneficial effect of adopting the above further solution is that the return pipe connects the cooling water flowing from the inside of the cooling space to the top of the installation base plate with the input end of the circulation pump.

[0016] Furthermore, the output end of the spray pipe extends to the inside of the outer cover, and the output end of the spray pipe is close to the inner top wall of the outer cover.

[0017] The beneficial effect of adopting the above further solution is that the cooling water is transmitted from above the mounting base plate to above the inner cover.

[0018] Furthermore, a spray head is fixedly installed at the output end of the spray pipe, and the output end of the spray head faces the top of the inner cover.

[0019] The beneficial effect of adopting the above further solution is that the spray head sprays the cooling water in the spray pipe toward the top of the inner cover, and the cooling water flows downward from the surface of the inner cover for cooling.

[0020] Furthermore, a mounting tube is fixedly mounted on the top of the outer cover, a plurality of connecting rods are fixedly mounted on the inner side wall of the mounting tube close to the top, and a top plate is fixedly mounted on one end of the connecting rod away from the mounting tube.

[0021] The beneficial effect of adopting the above further solution is that the top plate and the mounting tube are connected by connecting rods, and gaps are left between the connecting rods for airflow to pass through.

[0022] Furthermore, a motor is fixedly mounted on the top of the top plate, an exhaust fan is rotatably mounted on the bottom of the top plate, and an output shaft of the motor is fixedly connected to the top of the exhaust fan.

[0023] The beneficial effect of adopting the above further solution is that the motor drives the exhaust fan to rotate, driving the air flow to flow upward from the bottom of the inner cover, thereby increasing the cooling effect.

[0024] Compared with the prior art, the utility model provides a bell-type furnace cooling hood structure, which has the following beneficial effects:

[0025] 1. The hood-type furnace cooling hood structure has a water collecting trough on the arc-shaped top of the inner hood and a spiral groove from top to bottom on the vertical surface of the inner hood. Cooling water is sprayed to the arc-shaped top of the inner hood and flows into the spiral groove through the water collecting trough. The cooling water rotates and flows down on the surface of the inner hood along the spiral groove, which slows down the speed of the cooling water flow and increases the contact time between the cooling water and the inner hood. This solves the problem that when the cooling water flows down along the outer wall of the inner hood, due to the flat outer wall of the inner hood and the fast flow speed of the cooling water, there is not enough time for heat exchange.

[0026] 2. The cooling cover structure of the bell-type furnace is provided with a circulation pump on the surface of the outer cover. The cooling water flowing to the top of the installation base plate is sucked into the spray pipe through the circulation pump, and then sprayed to the surface of the inner cover again through the spray head, so that the cooling water will not flow out to the outside and cause rust damage to the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the utility model;

[0028] Figure 2 This is a front view of the structure of the utility model;

[0029] Figure 3 It is a three-dimensional schematic diagram of the inner cover of the utility model.

[0030] In the figure: 1. installation base plate; 101. through hole; 2. outer cover; 3. inner cover; 31. water collecting tank; 32. spiral groove; 4. air duct; 5. circulation pump; 6. return pipe; 7. spray pipe; 8. spray head; 9. installation pipe; 10. connecting rod; 11. top plate; 12. motor; 13. exhaust fan. DETAILED DESCRIPTION

[0031] 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.

[0032] See also Figure 1-3 A bell-type furnace cooling hood structure in this embodiment includes a mounting base plate 1, an outer hood 2 fixedly mounted on the top of the mounting base plate 1, and an inner hood 3 fixedly mounted on the top of the mounting base plate 1. The inner hood 3 is located inside the outer hood 2, and a through hole 101 having the same inner diameter as that of the inner hood 3 is opened on the top of the mounting base plate 1.

[0033] Among them, a water collecting trough 31 is opened on the arc-shaped top of the inner cover 3, and a spiral groove 32 is opened on the surface of the inner cover 3 to slow down the speed of cooling water flowing down from the surface of the inner cover 3. The spiral groove 32 spirals from the top of the side wall of the inner cover 3 to the bottom of the side wall of the inner cover 3.

[0034] Secondly, an air duct 4 is fixedly installed on the top of the inner cover 3, and the top of the air duct 4 is fixedly connected to the inner top wall of the outer cover 2, so that a sealed cooling space is formed between the installation base plate 1, the outer cover 2, the inner cover 3 and the air duct 4.

[0035] The spiral groove 32 allows the cooling water to flow downward along the spiral groove 32 on the surface of the inner cover 3, thereby slowing down the speed of the cooling water flowing downward, increasing the contact time between the cooling water and the inner cover 3, and increasing the efficiency of heat exchange between the cooling water and the inner cover 3. The cooling water flows downward to the mounting base plate 1, and the cooling space is sealed, so that the cooling water will not flow out and cause rust on the workpiece.

[0036] Meanwhile, a circulation pump 5 is fixedly installed on the surface of the outer cover 2 , a return pipe 6 is fixedly installed on the input end of the circulation pump 5 , and a spray pipe 7 is fixedly installed on the output end of the circulation pump 5 .

[0037] Among them, the input end of the return pipe 6 extends to the inside of the outer cover 2, the input end of the return pipe 6 is close to the top of the installation base plate 1, the output end of the spray pipe 7 extends to the inside of the outer cover 2, and the output end of the spray pipe 7 is close to the inner top wall of the outer cover 2.

[0038] Secondly, a spray head 8 is fixedly installed at the output end of the spray pipe 7 , and the output end of the spray head 8 faces the top of the inner cover 3 .

[0039] The circulation pump 5 works, sucking out the cooling water at the bottom of the cooling space through the reflux pipe 6, and after being pressurized, it is brought to the top of the inner cover 3 through the spray pipe 7, and sprayed to the inner cover 3 through the spray head 8. The cooling water flows downward to cool.

[0040] Meanwhile, a mounting tube 9 is fixedly mounted on the top of the outer cover 2 , a plurality of connecting rods 10 are fixedly mounted on the inner side wall of the mounting tube 9 close to the top, and a top plate 11 is fixedly mounted on one end of the connecting rod 10 away from the mounting tube 9 .

[0041] Among them, a motor 12 is fixedly installed on the top of the top plate 11, and an exhaust fan 13 is rotatably installed on the bottom of the top plate 11, and the output shaft of the motor 12 is fixedly connected to the top of the exhaust fan 13. The motor 12 rotates, driving the exhaust fan 13 to draw air upward, driving the air flow from the inner cover 3 to the air duct 4, and then flowing out through the gap between the connecting rods 10, increasing the air circulation speed and increasing the cooling efficiency.

[0042] The working principle of the above embodiment is as follows: the circulating pump 5 works, and the cooling water at the bottom of the cooling space is sucked out through the reflux pipe 6, and after being pressurized, it is brought to the top of the inner cover 3 through the spray pipe 7, and sprayed to the inner cover 3 through the spray head 8. The cooling water flows downward through the water collecting trough 31 to the inside of the spiral groove 32, and then flows downward along the spiral groove 32 for cooling.

Claims

1. A bell-type furnace cooling hood structure, characterized in that: It comprises a mounting base plate (1), an outer cover (2) fixedly mounted on the top of the mounting base plate (1), and an inner cover (3) fixedly mounted on the top of the mounting base plate (1), wherein the inner cover (3) is located inside the outer cover (2), and a through hole (101) having an inner diameter equal to that of the inner cover (3) is formed on the top of the mounting base plate (1); The arc-shaped top of the inner cover (3) is provided with a water collecting groove (31), and the surface of the inner cover (3) is provided with a spiral groove (32) for slowing down the speed of cooling water flowing down from the surface of the inner cover (3), and the spiral groove (32) spirals from the top of the side wall of the inner cover (3) to the bottom of the side wall of the inner cover (3).

2. The bell-type furnace cooling hood structure according to claim 1, characterized in that: An air duct (4) is fixedly mounted on the top of the inner cover (3); the top of the air duct (4) is fixedly connected to the inner top wall of the outer cover (2); and a sealed cooling space is formed between the mounting base plate (1), the outer cover (2), the inner cover (3) and the air duct (4).

3. The bell-type furnace cooling hood structure according to claim 1, characterized in that: A circulation pump (5) is fixedly mounted on the surface of the outer cover (2), a return pipe (6) is fixedly mounted on the input end of the circulation pump (5), and a spray pipe (7) is fixedly mounted on the output end of the circulation pump (5).

4. The bell-type furnace cooling hood structure according to claim 3, characterized in that: The input end of the return pipe (6) extends to the interior of the outer cover (2), and the input end of the return pipe (6) is close to the top of the installation base plate (1).

5. The bell-type furnace cooling hood structure according to claim 3, characterized in that: The output end of the spray pipe (7) extends to the interior of the outer cover (2), and the output end of the spray pipe (7) is close to the inner top wall of the outer cover (2).

6. The bell-type furnace cooling hood structure according to claim 5, characterized in that: A spray head (8) is fixedly mounted on the output end of the spray pipe (7), and the output end of the spray head (8) faces the top of the inner cover (3).

7. The bell-type furnace cooling hood structure according to claim 1, characterized in that: A mounting tube (9) is fixedly mounted on the top of the outer cover (2); a plurality of connecting rods (10) are fixedly mounted on the inner side wall of the mounting tube (9) close to the top; and a top plate (11) is fixedly mounted on one end of the connecting rod (10) away from the mounting tube (9).

8. The bell-type furnace cooling hood structure according to claim 7, characterized in that: A motor (12) is fixedly mounted on the top of the top plate (11), an exhaust fan (13) is rotatably mounted on the bottom of the top plate (11), and an output shaft of the motor (12) is fixedly connected to the top of the exhaust fan (13).

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