Heating furnace body vacuumizing device

Abstract

The utility model relates to the technical field of vacuumizing devices, and discloses a heating furnace body vacuumizing device which comprises a heating furnace and a connecting pipe fixed on the surface of the heating furnace, by arranging a filter screen frame, a pressing plate and a first spring, a first pushing block can be pushed to drive the fixed pressing plate to move when the filter screen frame and a filter screen need to be cleaned and replaced, so that the pressing plate does not make contact with the top of the filter screen frame any more, and at the moment, the filter screen frame can be pulled out from the interior of a mounting groove; the filter screen frame and the filter screen are cleaned or replaced, at the moment, the new filter screen frame and the filter screen or the cleaned filter screen frame and the filter screen are inserted into the mounting groove, and the first push block is loosened, so that the first spring can push the pressing plate to move; the top of the pressing plate is in contact with the top of the filter screen frame, and certain pressure is applied to the top of the filter screen frame, so that the filter screen frame is dismounted and mounted, and the filter screen frame is relatively convenient to dismount and mount when the filter screen frame and the filter screen are replaced and cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumping devices, in particular to a vacuum pumping device for a heating furnace body. Background Art

[0002] In the metallurgical industry, a heating furnace is a device (industrial furnace) that heats materials or workpieces (usually metals) to rolling and forging temperature. Heating furnaces are used in many industries such as petroleum, chemical industry, metallurgy, machinery, heat treatment, surface treatment, building materials, electronics, materials, light industry, daily chemicals, and pharmaceuticals.

[0003] At present, some existing heating furnaces generally use a vacuum pump to extract the gas inside the furnace body when it is necessary to evacuate the inside of the furnace body to a vacuum state, so that the inside of the furnace body reaches a vacuum state. However, when the vacuum pump extracts the gas inside the furnace body, the gas may be mixed with foreign matter. In order to increase the service life of the vacuum pump, some existing practices are to install a filter at the front end of the furnace body pipeline or the vacuum pump air inlet pipe to filter the foreign matter and prevent the foreign matter from entering the vacuum pump, thereby increasing the service life of the vacuum pump. However, this filtering device is generally located inside the pipeline and is installed and fixed by bolts. It is relatively inconvenient to disassemble and install the filter screen when replacing and cleaning the filter screen. For this reason, we propose a heating furnace body vacuum extraction device to solve or improve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a vacuum pumping device for a heating furnace body, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solution: it includes a heating furnace, a connecting pipe fixed to the surface of the heating furnace, a filter bin fixed to the bottom of the connecting pipe, an installation groove opened inside the filter bin, a filter screen frame inserted inside the installation groove, a pressure plate arranged at the top of the filter screen frame, the bottom of the pressure plate contacts with the top of the filter screen frame, a first spring fixed to the top of the pressure plate, the filter screen arranged inside the filter screen frame, and a limit assembly arranged inside the filter screen frame.

[0006] Furthermore, the limiting component includes a limiting column inserted into the filter frame, the bottom of the limiting column contacts the top of the filter, a second spring fixed to the surface of the limiting column, a second push block fixed to the top of the limiting column, and a slot for the second push block to move is opened at the top of the filter frame.

[0007] Furthermore, a limiting rod is fixed on the top of the pressing plate, and a slot for the limiting rod to move is provided inside the filter bin, and one end of the limiting rod is inserted into the slot.

[0008] Furthermore, a groove is provided on the surface of the filter bin at one side of the pressure plate, the first push block is fixed to the surface of the pressure plate through a connecting column, the connecting rod is located inside the groove and can move along the groove direction, and the first push block is located on one side of the outer surface of the filter bin.

[0009] Furthermore, a vacuum pump is provided at the bottom of the filter bin, an air inlet pipe of the vacuum pump is fixed to the bottom of the filter bin and the internal space thereof is connected to the interior of the filter bin.

[0010] Furthermore, a bin door is fixed on the surface of the filter bin via a rotating shaft.

[0011] Furthermore, a plurality of groups of pressure plates, mounting grooves and filter screen frames are equidistantly arranged inside the filter bin, and a plurality of groups of first springs and limiting rods are fixed on the top of a group of pressure plates.

[0012] Compared with the prior art, the utility model has the following beneficial effects: by setting the filter frame, the pressure plate and the first spring, the first push block can be pushed when the filter frame and the filter need to be cleaned and replaced, so that the first push block drives the fixed pressure plate to move, so that the pressure plate no longer contacts the top of the filter frame. At this time, the filter frame can be pulled out from the inside of the installation groove, and the filter frame and the filter can be cleaned or replaced. At this time, the new filter frame and the filter or the cleaned filter frame and the filter can be inserted into the inside of the installation groove and the first push block can be released to enable the first spring to push the pressure plate to move, so that the top of the pressure plate contacts the top of the filter frame and applies a certain pressure to the top of the filter frame, thereby completing the disassembly and installation of the filter frame. It is relatively convenient to disassemble and install the filter frame when replacing and cleaning the filter frame and the filter.

[0013] Compared with the prior art, the utility model also has the following beneficial effects: by setting a limit assembly and a filter screen, when the filter screen is damaged or aged and needs to be replaced, the second push block can be pushed so that the second push block drives the limit column to move, so that the bottom of the limit column no longer contacts the top of the filter screen. At this time, one end of the filter screen can be lifted to remove the filter screen from the inside of the filter screen frame for replacement, without the need to replace the entire filter screen frame, thus saving use costs and being relatively convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the filter bin of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the pressing plate of the utility model;

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the filter bin of the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the limit column of the utility model.

[0019] In the figure: 1. heating furnace; 2. connecting pipe; 3. filter chamber; 4. vacuum pump; 5. filter frame; 6. pressure plate; 7. first push block; 8. mounting groove; 9. first spring; 10. limiting rod; 11. second push block; 12. filter; 13. limiting column; 14. second spring. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-5 , including a heating furnace 1, a connecting pipe 2 fixed to the surface of the heating furnace 1, the internal space of the connecting pipe 2 is connected to the internal space of the heating furnace 1, a filter bin 3 is fixed to the bottom of the connecting pipe 2, the internal space of the connecting pipe 2 is connected to the internal space of the filter bin 3, a bin door is fixed on the surface of the filter bin 3 through a rotating shaft, and a sealing gasket is arranged on the surface of the bin door, which can improve the sealing between the bin door and the filter bin 3 and can also improve the sealing between the bin door and the filter screen frame 5, reduce or avoid gas passing through the gap between the bin door and the filter screen frame 5, an installation groove 8 is opened in the interior of the filter bin 3, the filter screen frame 5 is inserted in the interior of the installation groove 8, a pressing plate 6 is arranged on the top of the filter screen frame 5, and the bottom of the pressing plate 6 is connected to the filter screen frame 5 The filter chamber 3 is in contact with the top, and a groove is provided on the surface of the filter chamber 3 at one side of the pressure plate 6. The first push block 7 is fixed to the surface of the pressure plate 6 by a connecting column. The connecting rod is located inside the groove and can move along the groove direction. The first push block 7 is located on one side of the outer surface of the filter chamber 3. When the first push block 7 moves, it will drive the fixed pressure plate 6 to move. The first spring 9 is fixed to the top of the pressure plate 6. One end of the first spring 9 is fixed to the top of the pressure plate 6, and the other end is fixed to the inner surface of the filter chamber 3. When the pressure plate 6 moves, it will squeeze the first spring 9 to deform the first spring 9. When there is no external force interference, the first spring 9 will push the pressure plate 6 to move. The pressure plate 6, the mounting groove 8 and the filter frame 5 are arranged in several groups equidistantly inside the filter chamber 3.

[0022] A limit rod 10 is fixed on the top of the pressure plate 6, and several groups of first springs 9 and limit rods 10 are fixed on the top of a group of pressure plates 6. A slot for the limit rod 10 to move is opened inside the filter bin 3, and one end of the limit rod 10 is inserted inside the slot. The limit rod 10 can limit the position of the pressure plate 6 to prevent the pressure plate 6 from tilting when moving, thereby improving the stability of the pressure plate 6 when moving. A vacuum pump 4 is arranged at the bottom of the filter bin 3, and the air inlet pipe of the vacuum pump 4 is fixed to the bottom of the filter bin 3 and the internal space is connected with the interior of the filter bin 3. The filter screen 12 is arranged inside the filter screen frame 5. The number of filter screens 12 is the same as the number of filter screen frames 5. When the filter screen frame 5 moves, it will drive the filter screen 12 arranged inside to move, and the limit assembly is arranged inside the filter screen frame 5.

[0023] The limiting component includes a limiting column 13 inserted into the filter frame 5, the bottom of the limiting column 13 contacts the top of the filter screen 12, and a limiting block is fixed on the inner surface of the filter frame 5. The limiting block and the limiting column 13 are symmetrically arranged and the bottom of the limiting block contacts the top of the filter screen 12. The limiting column 13 cooperates with the limiting block to limit the position of the filter screen 12 to prevent the filter screen 12 from detaching from the inside of the filter frame 5. A second spring 14 is fixed on the surface of the limiting column 13, one end of the second spring 14 is fixed to the surface of the limiting column 13, and the other end is fixed to the inner surface of the filter frame 5. When the limiting column 13 moves, the second spring 14 will be squeezed to deform the second spring 14. When there is no external force interference, the second spring 14 will push the limiting column 13 to move. A limit plate is fixed between the two springs 14, and the limit plate can limit the position of the limit column 13 to prevent the limit column 13 from detaching from the inside of the filter frame 5. A second push block 11 is fixed on the top of the limit column 13, and a slot for the second push block 11 to move is opened on the top of the filter frame 5. When the second push block 11 moves, it will drive the fixed limit column 13 to move. When the filter 12 is damaged or aged and needs to be replaced, the second push block 11 is pushed to make the second push block 11 drive the limit column 13 to move, so that the bottom of the limit column 13 no longer contacts the top of the filter 12. At this time, one end of the filter 12 can be lifted to take the filter 12 out of the inside of the filter frame 5 for replacement. There is no need to replace the filter frame 5 as a whole, which saves the use cost and is relatively convenient to use.

[0024] Working principle: when it is necessary to evacuate the interior of the furnace body of the heating furnace 1 to a vacuum state, the gas inside the filter chamber 3 can be evacuated through the vacuum pump 4 to reduce the air pressure inside the filter chamber 3. At this time, the gas inside the heating furnace 1 will enter the interior of the filter chamber 3 through the connecting pipe 2 under the action of the air pressure. The several groups of filter frames 5 arranged inside the filter chamber 3 can filter the gas entering the interior of the filter chamber 3 to prevent debris and dust from directly entering the interior of the vacuum pump 4, thereby increasing the service life of the vacuum pump 4. When the gas inside the heating furnace 1 is evacuated by the vacuum pump 4, the interior of the heating furnace 1 can be made into a vacuum state. When the filter frame 5 and the filter screen 12 need to be replaced or cleaned after a period of use, the chamber door can be opened by rotating it along one side of the rotating shaft. At this time, pushing the first push block 7 can make the first push block 7 drive the pressure plate 6 to move, so that the bottom of the pressure plate 6 no longer contacts the top of the filter frame 5. At this time, the filter frame 5 can be pulled out from the inside of the mounting groove 8, and the filter frame 5 and the filter screen 12 can be replaced or cleaned. 2 for cleaning or replacement, insert the new filter frame 5 and the filter screen 12 or the cleaned filter frame 5 and the filter screen 12 into the interior of the installation groove 8 and loosen the first push block 7 to enable the first spring 9 to push the pressure plate 6 to move, so that the top of the pressure plate 6 contacts the top of the filter frame 5 and applies a certain pressure to the top of the filter frame 5, so that the bottom of the filter frame 5 is close to the surface of the installation groove 8, thereby improving the sealing between the filter frame 5 and the installation groove 8, and completing the removal and installation of the filter frame 5. When replacing and cleaning the filter frame 5 and the filter screen 12, it is relatively convenient to remove and install the filter frame 5. At the same time, because the filter frame 5 and the filter screen 12 are provided with several groups inside the filter chamber 3, the models of the filter frame 5 and the filter screen 12 can be replaced according to the needs of filtering accuracy. At the same time, because the pressure plate 6 is movable, the filter frames 5 of different thicknesses can be inserted into the interior of the installation groove 8, thereby improving the adaptability of the device to different filter frames 5 and requirements, and the use is relatively convenient.

[0025] 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 vacuum pumping device for a heating furnace, characterized in that: It comprises a heating furnace (1) and a connecting pipe (2) fixed to the surface of the heating furnace (1); A filter chamber (3), the filter chamber (3) is fixed to the bottom of the connecting pipe (2); A mounting groove (8), the mounting groove (8) being disposed inside the filter bin (3); A filter frame (5), the filter frame (5) is inserted into the interior of the installation groove (8); A pressing plate (6), the pressing plate (6) is arranged on the top of the filter frame (5), and the bottom of the pressing plate (6) is in contact with the top of the filter frame (5); A first spring (9), the first spring (9) is fixed to the top of the pressure plate (6); A filter screen (12), the filter screen (12) is arranged inside the filter screen frame (5); A limit assembly is arranged inside the filter frame (5).

2. A heating furnace body vacuum pumping device according to claim 1, characterized in that: The limiting component includes a limiting column (13) inserted into the filter frame (5), the bottom of the limiting column (13) contacts the top of the filter (12), a second spring (14) fixed to the surface of the limiting column (13), and a second push block (11) fixed to the top of the limiting column (13); the top of the filter frame (5) is provided with a slot for the second push block (11) to move.

3. The vacuum pumping device for a heating furnace according to claim 1, characterized in that: A limiting rod (10) is fixed on the top of the pressing plate (6), and a slot for the limiting rod (10) to move is provided inside the filter bin (3), and one end of the limiting rod (10) is inserted into the slot.

4. The vacuum pumping device for a heating furnace according to claim 1, characterized in that: A groove is provided on the surface of the filter bin (3) at a position on one side of the pressure plate (6); the first push block (7) is fixed to the surface of the pressure plate (6) via a connecting column; the connecting rod is located inside the groove and can move along the direction of the groove; the first push block (7) is located on one side of the outer surface of the filter bin (3).

5. The vacuum pumping device for a heating furnace according to claim 1, characterized in that: A vacuum pump (4) is provided at the bottom of the filter bin (3); an air inlet pipe of the vacuum pump (4) is fixed to the bottom of the filter bin (3) and an internal space of the vacuum pump (4) is connected to the interior of the filter bin (3).

6. The vacuum pumping device for a heating furnace according to claim 1, characterized in that: A bin door is fixed on the surface of the filter bin (3) via a rotating shaft.

7. The vacuum pumping device for a heating furnace according to claim 3, characterized in that: A plurality of groups of pressure plates (6), mounting grooves (8) and filter screen frames (5) are equidistantly arranged inside the filter bin (3), and a plurality of groups of first springs (9) and limiting rods (10) are fixed on the top of a group of pressure plates (6).

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