Heat recovery device for casting furnace

Abstract

The utility model belongs to the field of casting technology, and particularly relates to a heat recovery device for a casting furnace. A heat recovery device for a casting furnace comprises a furnace body and a furnace cover, wherein a support platform is arranged at the opening of the upper end of the furnace body, and an air outlet pipe and an air inlet pipe are arranged on the furnace body above the support platform; a driving assembly is arranged on the furnace cover, and the output shaft of the driving assembly can be rotatably passed through the furnace cover and extended to the bottom of the furnace cover, a screw is arranged on the output shaft of the driving assembly, and a sealing plate is threadedly connected to the screw; an exhaust pump is fixedly connected at the outlet of the air outlet pipe; when the driving assembly drives the sealing plate to descend and cover the supporting platform, the air outlet pipe and the air inlet pipe are not connected to the inner cavity of the furnace body; when the driving assembly drives the sealing plate to rise and detach from the supporting platform, the air outlet pipe and the air inlet pipe are connected to the inner cavity of the furnace body. The utility model can extract heat from the casting furnace without opening the furnace cover to achieve full heat recovery and optimize the processing environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting, and in particular relates to a heat recovery device for a casting furnace. Background Art

[0002] When casting various types of existing castings, a casting furnace is generally required. The casting furnace is generally composed of a casting furnace and a furnace cover. When casting castings, the furnace cover needs to be covered first, and the casting furnace is heated. After reaching the predetermined temperature, the casting is placed in, and the casting needs to be taken out after heating for a certain period of time for finishing such as hammering. However, when casting castings are cast multiple times, the heat inside the casting furnace escapes through the furnace cover after each removal and cannot be recycled. In addition, the castings in the casting furnace need to be placed for a period of time to cool the temperature in the casting furnace, and then the staff will clamp the castings, which leads to low casting efficiency of the casting furnace.

[0003] In the prior art, the Chinese utility model patent with application number 202021325125.9 discloses a high-efficiency casting furnace, including: a heating box, a heating element, an air vent, a transverse pipe, a casting furnace, a connecting pipe, a filter box, an air suction pump, an air outlet pipe and a grid support plate; a heating element is arranged on the upper and lower walls of the heating box, and the heating element is a cavity structure with air vents opened thereon, and the transverse pipe is arranged on the heating box and connected to the heating element; after the castings in the casting furnace of the utility model are heated, before being taken out, the high-temperature gas in the casting furnace is absorbed by an air pump and transmitted to the heating element of the heating box, and the heating element preheats the castings placed on the grid support plate, effectively utilizes the heat in the casting furnace, and at the same time, when absorbing the gas in the casting furnace, it can accelerate the cooling of the casting furnace, which is convenient for the staff to clamp the castings, and then place the preheated castings in the casting furnace for heating, shortening the heating time and improving the use efficiency of the casting furnace.

[0004] However, the above existing technologies still have the following technical problems: since the furnace cover needs to be opened when the heat in the casting furnace is extracted, a lot of heat has already escaped and diffused into the air, which not only causes heat waste, but also leads to an increase in temperature in the production workshop, making the processing environment relatively harsh. Utility Model Content

[0005] In order to solve the technical problems existing in the prior art, the present application provides a casting furnace heat recovery device, which can extract heat from the casting furnace without opening the furnace cover to achieve full heat recovery and optimize the processing environment.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A heat recovery device for a casting furnace comprises a furnace body and a furnace cover arranged on the furnace body, a supporting platform is arranged at the inner cavity at the opening of the upper end of the furnace body, an air outlet pipe and an air inlet pipe are fixedly connected to the furnace body above the supporting platform; a driving component is fixedly connected to the furnace cover vertically downward, the output shaft of the driving component can be rotatably passed through the furnace cover and extend to the bottom of the furnace cover, a screw rod is coaxially fixedly connected to the output shaft of the driving component under the furnace cover, and a horizontally arranged sealing plate is threadedly connected to the screw rod; an exhaust pump is fixedly connected to the outlet of the air outlet pipe; when the driving component drives the sealing plate to descend and cover the supporting platform, the air outlet pipe and the air inlet pipe are not connected to the inner cavity of the furnace body; when the driving component drives the sealing plate to rise and separate from the supporting platform, the air outlet pipe and the air inlet pipe are connected to the inner cavity of the furnace body.

[0008] Preferably, an exhaust pipe communicating with the inner cavity of the furnace body is fixedly connected to the lower part of the furnace body, an exhaust pump is arranged on the exhaust pipe, and an exhaust valve is arranged on the exhaust pipe between the furnace body and the exhaust pump.

[0009] Preferably, a second filter box is provided at the outlet of the exhaust pump.

[0010] Preferably, a filter box 1 is provided at the outlet of the vacuum pump.

[0011] Preferably, the collecting pipe 1 is connected to the outlets of the plurality of filter boxes 1 respectively, and an air extraction valve is provided between the collecting pipe 1 and the outlet of the filter box 1.

[0012] Preferably, the collecting pipe 2 is respectively connected to the outlets of the plurality of filter boxes 2.

[0013] Preferably, a threaded sleeve is fixedly embedded in the sealing plate, and the screw rod is threadably connected in the threaded sleeve.

[0014] Preferably, a plurality of sliding rods are vertically fixedly connected to the upper end surface of the sealing plate, and the sliding rods can be slidably arranged in the furnace cover.

[0015] Preferably, the driving component is a motor.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model provides a supporting platform, a sealing plate, an air outlet duct and an air inlet duct. When the driving component drives the screw rod to rotate to lower the supporting platform, the sealing plate cover can be set on the supporting platform. At this time, the air outlet duct and the air inlet duct are not connected with the inner cavity of the furnace body when it is heated, and the furnace body can be effectively heated at this time; when the driving component drives the sealing plate to rise to separate from the supporting platform, the air outlet duct and the air inlet duct are connected with the inner cavity of the furnace body when it is heated, and when the vacuum pump is started, the heat in the furnace body can be extracted for heat recovery; compared with the prior art, the utility model can realize the recovery of heat in the furnace body of the casting furnace without opening the furnace cover, and also avoids the high production environment temperature caused by opening the furnace cover to release heat or recover heat in the prior art.

[0018] 2. By setting up an exhaust pipe, an exhaust pump, and an exhaust valve, the heat in the furnace body can be further recovered when the furnace cover is opened; by setting up filter box 1 and filter box 2, the air extracted from the furnace body can be filtered.

[0019] 3. By setting the collecting pipe 1 and the collecting pipe 2, multiple groups of the heat recovery devices of the casting furnace can be used together to improve the utilization efficiency of the heat after recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of Example 1 of the utility model.

[0021] Figure 2 This is a partial structural diagram of Example 1 of the utility model.

[0022] Figure 3 This is a schematic diagram of the structure of Example 1 of the utility model when multiple groups are used.

[0023] Figure 4 This is a schematic diagram of the structure of Example 2 of the utility model.

[0024] Figure 5 This is a schematic diagram of the structure of Example 2 of the utility model when multiple groups are used.

[0025] In the figure: 1. furnace body, 11. supporting platform, 12. air outlet, 13. air inlet, 14. air outlet pipe, 15. air inlet pipe, 16. exhaust pipe, 2. furnace cover, 21. motor base, 3. motor, 31. screw, 4. sealing plate, 41. threaded sleeve, 42. sliding rod, 5. vacuum pump, 51. filter box 1, 6. collecting pipe 1, 61. vacuum valve, 7. exhaust pump, 71. exhaust valve, 72. filter box 2, 8. collecting pipe 2. DETAILED DESCRIPTION

[0026] 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 them. 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.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention. Example 1

[0028] See also Figure 1 , 2 As shown, a heat recovery device for a casting furnace comprises a furnace body 1 and a furnace cover 2 arranged on the furnace body 1. The connection method between the furnace body 1 and the furnace cover 2 can select an existing structure. For example, the furnace cover 2 is hinged to the furnace body 1 through a pin structure, and the inner cavity of the furnace body 1 is opened by flipping the furnace cover 2, or the furnace cover 2 and the furnace body 1 are split structures, and the furnace cover 2 is installed on the furnace body 1 through a buckle or other structure, and the inner cavity of the furnace body 1 is opened by lifting the furnace cover 2.

[0029] A support platform 11 is provided in the inner cavity at the upper opening of the furnace body 1. In this embodiment, the support platform 11 is formed by opening an annular groove structure in the inner cavity of the furnace body 1. In other embodiments, a support ring structure can be directly welded in the inner cavity of the furnace body 1 to form the support platform 11. It should be noted that the upper end surface of the support platform 11 is horizontally arranged.

[0030] An air outlet 12 and an air inlet 13 are provided on the furnace body 1 above the supporting platform 11. The air outlet 12 and the air inlet 13 can be arranged relatively to each other. An air outlet pipe 14 and an air inlet pipe 15 are welded to the outer side of the furnace body 1 corresponding to the air outlet 12 and the air inlet 13. The air outlet pipe 14 and the air inlet pipe 15 are connected to the air outlet 12 and the air inlet 13 respectively.

[0031] A motor base 21 is fixedly connected to the furnace cover 2 by bolts, and a driving component is fixedly connected to the motor base 21 vertically downward by bolts. In this embodiment, in order to improve the level of automation, the driving component is a motor 3, and the output shaft of the motor 3 can be rotatably penetrated in the furnace cover 2 and extends to the bottom of the furnace cover 2. A screw rod 31 is coaxially fixedly connected to the output shaft of the motor 3 under the furnace cover 2 through a coupling, and a horizontally arranged sealing plate 4 is threadedly connected to the screw rod 31. In order to reduce the difficulty of processing, in this embodiment, a threaded sleeve 41 is fixedly embedded in the sealing plate 4, and the screw rod 31 is threadedly connected in the threaded sleeve 41. Therefore, through the above structure, when the motor 3 drives the screw rod 31 to rotate, the sealing plate 4 can be driven to move up and down.

[0032] Furthermore, in order to make the sealing plate 4 move up and down more smoothly, in the present embodiment, a plurality of slide rods 42 are vertically fixedly connected to the upper end surface of the sealing plate 4 by bolts or by welding, and a sliding sleeve (not shown) is vertically fixedly embedded in the furnace cover 2, and the sliding rod 42 can be slidably inserted into the sliding sleeve in the furnace cover 2.

[0033] The outlet end of the air outlet pipe 14 is fixedly connected to the inlet of the vacuum pump 5. In order to filter the air extracted from the inner cavity of the furnace body 1, a filter box 51 is fixedly connected to the outlet of the vacuum pump 5.

[0034] Therefore, through the above structure, when the motor 3 drives the screw rod 31 to drive the sealing plate 4 to descend and cover the supporting platform 11, the air outlet pipe 14 and the air inlet pipe 15 are not connected to the inner cavity of the furnace body 1 below the sealing plate 4, and the casting in the inner cavity of the furnace body 1 can be heated at this time; when the motor 3 drives the screw rod 31 to drive the sealing plate 4 to rise and separate from the supporting platform 11, the air outlet pipe 14 and the air inlet pipe 15 are connected to the inner cavity of the furnace body 1, and the vacuum pump 5 is turned on at this time, and the air outside the furnace body 1 enters the inner cavity of the furnace body 1 through the air inlet 13 and the heat in the furnace body 1 enters the filter box 51 through the air outlet pipe 14, and then the hot air filtered by the filter box 51 can be used, thereby completing heat recovery.

[0035] See also Figure 3 As shown, in this embodiment, in order to fully recover the heat in multiple casting furnaces, multiple casting furnaces can be combined with the casting furnace heat recovery device to form multiple groups in parallel. The collecting pipe 6 is respectively connected to the outlet of the filter box 51 of each group of casting furnace heat recovery devices. An air extraction valve 61 is provided between the collecting pipe 6 and the outlet of each filter box 51. In order to facilitate automatic control, the air extraction valve 61 can be a solenoid valve. Therefore, according to the different heat recovery time of each casting furnace, the corresponding air extraction valve 61 can be opened, the corresponding air extraction pump 51 can be opened, and the recovered hot air can be reused through the collecting pipe 6. Example 2

[0036] See also Figure 4 As shown, this embodiment is further improved on the basis of the embodiment 1. After the temperature of the inner cavity of the furnace body 1 is reduced to the point where the furnace cover 2 can be opened, the remaining heat in the inner cavity of the furnace body 1 will escape from the furnace body. In order to further recover the heat in the furnace body 1, an exhaust pipe 16 connected to the inner cavity of the furnace body 1 is welded at the lower part of the furnace body 1, an exhaust pump 7 is installed at the outlet of the exhaust pipe 16, and a filter box 2 72 is provided at the outlet of the exhaust pump 7. An exhaust valve 71 is installed on the exhaust pipe 16 between the furnace body 1 and the exhaust pump 7. In order to facilitate automatic control, the exhaust valve 71 can be a solenoid valve.

[0037] Therefore, through the above structure, when the furnace cover 2 is not opened, the exhaust valve 71 is closed, and the vacuum pump 5 is used to extract the heat in the furnace body 1 for recovery; when the furnace cover 2 is opened, the exhaust valve 71 is opened, and the vacuum pump 5 and the exhaust pump 7 are used together to extract and recover the heat in the furnace body 1.

[0038] See also Figure 5 As shown, similar to the collecting pipe 1 6 of the first embodiment, multiple casting furnaces can be combined with the casting furnace heat recovery device to form multiple parallel groups, and the collecting pipe 2 8 is respectively connected to the outlet of the filter box 2 72 of each group of casting furnace heat recovery devices. Therefore, according to the different heat recovery time of each casting furnace, the corresponding exhaust valve 71 can be opened, the corresponding exhaust pump 7 can be opened, and the recovered hot air can be reused through the collecting pipe 2 8.

[0039] The working process of the utility model embodiment 2 is as follows:

[0040] Open the furnace cover 2 and put the casting into the furnace body 1, and then cover the furnace cover 2. The motor 3 drives the screw rod 31 and drives the sealing plate 4 to be covered on the support platform 11. The exhaust valve 71, the vacuum pump 5, and the exhaust pump 7 are closed, and then the casting is heated.

[0041] Before the casting is taken out, the motor 3 flips and drives the screw rod 31 to drive the sealing plate 4 to separate from the supporting platform 11, and the controller controls the vacuum pump 5 to start, so as to discharge the outside air through the air inlet pipe 15, the inner cavity of the furnace body 1, the air outlet pipe 14, the filter box 1 51, and the collecting pipe 1 6. In this process, the air takes away the heat in the furnace body 1 and recycles it; after opening the furnace cover 2, the exhaust valve 71 and the exhaust pump 7 are opened, and the exhaust pump 7 drives the hot air in the furnace body 1 through the exhaust pipe 16 and the filter box 2 72 into the collecting pipe 2 8 for reuse.

[0042] It should be noted that, in order to improve the level of automation, the existing controller can connect and control the motor 3, the vacuum pump 5, the exhaust pump 7, the vacuum valve 61 and the exhaust valve 71. The connection method and control principle are existing technologies as long as they can meet the above-mentioned working process.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat recovery device for a casting furnace, comprising a furnace body and a furnace cover arranged on the furnace body, characterized in that: A support platform is provided in the inner cavity at the upper opening of the furnace body, and an air outlet pipe and an air inlet pipe are fixedly connected to the furnace body above the support platform; a driving component is fixedly connected vertically downward to the furnace cover, and the output shaft of the driving component can be rotatably passed through the furnace cover and extended to the bottom of the furnace cover, and a screw rod is coaxially fixedly connected to the output shaft of the driving component under the furnace cover, and a horizontally arranged sealing plate is threadedly connected to the screw rod; An air pump is fixedly connected to the outlet of the air outlet pipe; When the driving assembly drives the sealing plate to descend and cover the supporting platform, the air outlet pipe and the air inlet pipe are not connected to the inner cavity of the furnace body; when the driving assembly drives the sealing plate to ascend and detach from the supporting platform, the air outlet pipe and the air inlet pipe are connected to the inner cavity of the furnace body.

2. The heat recovery device for a casting furnace according to claim 1, characterized in that: An exhaust pipe communicating with the inner cavity of the furnace body is fixedly connected to the lower part of the furnace body, an exhaust pump is arranged on the exhaust pipe, and an exhaust valve is arranged on the exhaust pipe between the furnace body and the exhaust pump.

3. The heat recovery device for a casting furnace according to claim 2, characterized in that: A second filter box is arranged at the outlet of the exhaust pump.

4. The heat recovery device for a casting furnace according to claim 1, characterized in that: A filter box 1 is arranged at the outlet of the vacuum pump.

5. The heat recovery device for a casting furnace according to claim 4, characterized in that: The collecting pipe 1 is respectively connected to the outlets of the plurality of filter boxes 1, and an air extraction valve is arranged between the collecting pipe 1 and the outlet of the filter box 1.

6. The heat recovery device for a casting furnace according to claim 3, characterized in that: The collecting pipe 2 is respectively connected to the outlets of the plurality of filter boxes 2.

7. A casting furnace heat recovery device according to any one of claims 1 to 6, characterized in that: A threaded sleeve is fixedly embedded in the sealing plate, and the screw rod is threadably connected in the threaded sleeve.

8. A casting furnace heat recovery device according to any one of claims 1 to 6, characterized in that: A plurality of sliding rods are vertically fixedly connected to the end surface of the sealing plate, and the sliding rods can be slidably arranged in the furnace cover.

9. A casting furnace heat recovery device according to any one of claims 1 to 6, characterized in that: The driving component is a motor.

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