A vacuum quenching furnace with an air filtration structure

Abstract

This utility model discloses a vacuum quenching furnace with an air filtration structure. Several extraction pipes are symmetrically connected and fixed to the top of the inner furnace, with each extraction pipe equidistantly distributed in the front-to-back direction. The top of each extraction pipe extends out from the top of the horizontal vacuum quenching furnace and is connected to a filter chamber. A damping block is slidably fitted to the inner front side of each filter chamber, and a sealing plate is fixedly connected to the front side of each damping block. The sealing plate slides and engages with the filter chamber in the front-to-back direction. Several filter plates are equidistantly inserted into the rear side of each sealing plate, and these filter plates slide and engage with the damping block in the front-to-back direction. The outer side of each filter plate slides and adheres to the inner wall of the filter chamber. This design enables centralized air filtration while performing multi-channel vacuuming operations, facilitating integrated replacement and cleaning, improving cleaning efficiency, and ensuring stable material properties.

Description

Technical Field

[0001] This utility model relates to the field of vacuum quenching furnace technology, and in particular to a vacuum quenching furnace with an air filtration structure. Background Technology

[0002] Vacuum quenching furnace refers to a heat treatment process in which easily hardenable materials such as tool steel, high-speed steel, and alloy steel are placed in a vacuum furnace, the vacuum level inside the furnace is reached, the temperature is heated to above the required critical temperature, and the furnace is held at that temperature for a period of time according to the process requirements. Then, high-pressure inert gas is rapidly introduced into the furnace, and the pressure inside the furnace reaches the pressure specified by the process. At the same time, a high-power fan drives a heat-resistant fan to blow the hot workpiece at high speed. After the hot gas exchange and cooling, the cold gas blows the workpiece again, and finally a martensitic quenched structure is obtained.

[0003] When vacuuming a sealed furnace, the air inside is mostly drawn in from the free flow of external air, resulting in a relatively low level of cleanliness. Dust and impurities are drawn into the vacuum pump during the vacuuming process, leading to dust accumulation and blockage over time, which affects vacuuming efficiency. The existing vacuum quenching furnace with air filtration structure (publication number CN222294125U) addresses this issue by equipping several suction nozzles inside the furnace with end caps and filter components to achieve filtration during vacuuming. However, this method has the following problems: First, the filter components and end caps, located inside the furnace, are subject to high-temperature wear during vacuum heating, affecting their material properties. Second, the numerous and scattered end caps and filter components require individual disassembly and reassembly for replacement or cleaning, a cumbersome and time-consuming process. Furthermore, dust filtered by the filter components can easily fall into the furnace during disassembly, causing secondary pollution. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum quenching furnace with an air filtration structure, which can perform centralized air filtration while carrying out multi-channel vacuuming operations, thereby enabling integrated replacement and cleaning operations, improving cleaning efficiency. In addition, while ensuring airtightness, it is not affected by the high temperature of vacuum heating, ensuring the stability of material properties and extending its service life.

[0005] To achieve the above objectives, a vacuum quenching furnace with an air filtration structure is provided, comprising: a horizontal vacuum quenching furnace, wherein a furnace cavity is opened in the upper right part of the front side of the horizontal vacuum quenching furnace, a furnace cover is fitted on the front side of the furnace cavity, a heating chamber is fitted inside the furnace cavity, an inner furnace is fixedly connected to the inner side of the heating chamber, and several exhaust pipes are symmetrically connected and fixed to the top of the inner furnace, the exhaust pipes are equidistantly distributed in the front-back direction, the top ends of the exhaust pipes extend from the top of the horizontal vacuum quenching furnace and are connected and fixedly connected to a filter chamber, the inner front end of the filter chamber is damped and slidably fitted with a damping block, the front side of the damping block is fixedly connected with a sealing plate, the sealing plate is slidably fitted with the filter chamber in the front-back direction, and several filter plates are equidistantly inserted into the rear side of the sealing plate, the filter plates are corresponding to the damping blocks. The filter plates are slidably connected in the front and rear directions. The outer side of the filter plate slides against the inner wall of the filter chamber. The top of each filter chamber is connected to and fixed with an air collecting cylinder. The center of the top of each air collecting cylinder is connected to and fixed with a vacuum conduit. The lower end of the opposite side of each vacuum conduit is connected to the output port of the vacuum pump. By setting the filter chamber on the outside of the furnace body and connecting it to the inner furnace with several air extraction pipes, and then using sealing plates to stack and clamp several filter plates in the filter chamber for multiple filtration, the system can achieve centralized air filtration while performing multi-channel vacuuming operations. This allows for integrated replacement and cleaning operations, improving cleaning efficiency. Furthermore, the filter plates are mounted outside the furnace body and sealed and isolated by the filter chamber and sealing plates, ensuring airtightness and preventing them from being affected by the high temperature of vacuum heating, thus ensuring stable material properties and extending their service life.

[0006] According to the vacuum quenching furnace with an air filtration structure, a pressure gauge is fixedly connected to the front end of each gas collecting cylinder. The airtightness of the furnace cavity and the extraction channel is monitored in real time to ensure that leaks can be detected promptly.

[0007] According to the vacuum quenching furnace with an air filtration structure, the top of each gas collecting cylinder is symmetrically connected and fixed with a guide pipe, and the opposite ends of each guide pipe are connected and fixed to a vacuum conduit. This increases the unit pumping volume and accelerates the vacuum speed in the furnace cavity.

[0008] According to the vacuum quenching furnace with an air filtration structure, the bottom outer side of each vacuum conduit is threaded with a sealing ring, and the inner side of the sealing ring is pressed and sealed against the outer side of the vacuum conduit and the output port of the vacuum pump. This enhances the airtightness of the vacuum extraction port connection.

[0009] According to the vacuum quenching furnace with an air filtration structure, a handle is fixedly connected to the center of the front side of each sealing plate, and a rubber sleeve is nested in the middle of the outer side of each handle. This facilitates the control of pushing and pulling the sealing plate and the several filter plates inserted and fixed on it.

[0010] According to the aforementioned vacuum quenching furnace with an air filtration structure, the bottom of the horizontal vacuum quenching furnace is symmetrically fixed with base pads on both sides to ensure the stability of the equipment installation.

[0011] The above-mentioned solution has the following beneficial effects:

[0012] In this invention, a filter chamber is set on the outside of the furnace body and connected to the inner furnace by several air extraction pipes. Then, several filter plates are stacked and locked together in the filter chamber using sealing plates to perform multiple filtrations. This achieves centralized air filtration while performing multi-channel vacuuming operations, thereby enabling integrated replacement and cleaning operations, improving cleaning efficiency. Furthermore, the filter plates are mounted on the outside of the furnace body and sealed and isolated by the filter chamber and sealing plates, ensuring airtightness and preventing them from being affected by the high temperature of vacuum heating, thus ensuring stable material properties and extending their service life.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is an overall schematic diagram of a vacuum quenching furnace with an air filtration structure according to the present invention.

[0016] Figure 2 This is a schematic diagram of the internal structure of the furnace cavity in a vacuum quenching furnace with an air filtration structure according to the present invention.

[0017] Figure 3 This is a schematic diagram of the connection structure of the filter hopper in a vacuum quenching furnace with an air filtration structure according to the present invention.

[0018] Figure 4 This is a schematic diagram showing the distribution of filter plates in a vacuum quenching furnace with an air filtration structure according to the present invention.

[0019] Legend:

[0020] 1. Horizontal vacuum quenching furnace; 2. Furnace cover; 3. Heating chamber; 4. Inner furnace; 5. Ejection pipe; 6. Filter hopper; 7. Sealing plate; 8. Damping block; 9. Filter plate; 10. Gas collecting cylinder; 11. Vacuum conduit; 12. Pressure gauge; 13. Conductor pipe; 14. Sealing ring; 15. Base pad; 16. Handle. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1-4 This utility model provides a vacuum quenching furnace with an air filtration structure, including: a horizontal vacuum quenching furnace 1, with bottom pads 15 fixed symmetrically on the left and right sides of the bottom of the horizontal vacuum quenching furnace 1, a furnace cavity is opened on the upper right side of the front side of the horizontal vacuum quenching furnace 1, a furnace cover 2 is installed on the front side of the furnace cavity, a heating cavity 3 is installed inside the furnace cavity, and an inner furnace 4 is fixedly connected to the inner side of the heating cavity 3, providing an integrated vacuum quenching furnace 1 and a horizontal furnace cavity foundation.

[0023] Several exhaust pipes 5 are symmetrically connected and fixed to the top of the inner furnace 4. The exhaust pipes 5 are equidistantly distributed in the front-back direction. The top of each exhaust pipe 5 extends out of the top of the horizontal vacuum quenching furnace 1 and is connected and fixed to a filter chamber 6. The inner front side of each filter chamber 6 is fitted with a damping block 8. The front side of each damping block 8 is fixedly connected with a sealing plate 7. The sealing plate 7 is slidably fitted into the filter chamber 6 in the front-back direction. A handle is fixedly connected to the center of the front side of each sealing plate 7. A rubber sleeve is nested in the middle of the outer side of each handle. Several filter plates 9 are inserted into the rear side of each sealing plate 7 at equal intervals. The filter plates 9 are slidably fitted into the damping block 8 in the front-back direction. The outer side of each filter plate 9 is slidably fitted into the inner wall of the filter chamber 6 for multiple filtration. This allows for centralized air filtration while performing multi-channel vacuuming operations, enabling integrated replacement and cleaning operations and improving cleaning efficiency.

[0024] Each filter chamber 6 has a gas collecting cylinder 10 fixedly connected to its top. Each gas collecting cylinder 10 has a pressure gauge 12 fixedly connected to its front end. Each gas collecting cylinder 10 has a vacuum conduit 11 fixedly connected to its top center. The lower end of the opposite side of the vacuum conduit 11 is connected to the output port of the vacuum pump. Each gas collecting cylinder 10 has a connecting pipe 13 fixedly connected to its top front and back. The opposite ends of the connecting pipe 13 are connected to the vacuum conduit 11. Each bottom end of the vacuum conduit 11 has a sealing ring 14 threadedly connected to its outer side. The inner side of the sealing ring 14 is pressed and sealed against the outer side of the vacuum conduit 11 and the output port of the vacuum pump, thereby improving the vacuuming rate and strengthening and monitoring the airtightness of the passage.

[0025] Working principle: In this utility model, a filter chamber 6 is set on the outside of the furnace body and connected to the inner furnace 4 by several air extraction pipes 5. Then, several filter plates 9 are stacked and locked in the filter chamber 6 by sealing plates 7 to perform multiple filtration. This realizes centralized air filtration while performing multi-channel vacuum operation, and thus enables integrated replacement and cleaning operations, improving cleaning efficiency. Moreover, the filter plates 9 are set up on the outside of the furnace body and sealed and isolated by the filter chamber 6 and sealing plates 7, ensuring airtightness and preventing them from being affected by the high temperature of vacuum heating, ensuring stable material properties and extending their service life.

[0026] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A vacuum air quenching furnace having an air filtration structure, comprising: A horizontal vacuum quenching furnace (1) has a furnace cavity on the upper right side of the front side of the horizontal vacuum quenching furnace (1), a furnace cover (2) is installed on the front side of the furnace cavity, a heating cavity (3) is installed inside the furnace cavity, and an inner furnace (4) is fixedly connected to the inner side of the heating cavity (3). The inner furnace (4) is characterized in that a number of exhaust pipes (5) are symmetrically connected and fixed on the top left and right sides of the top of the inner furnace (4). The exhaust pipes (5) are equidistantly distributed in the front and rear directions. The top of the exhaust pipes (5) extends out of the top of the horizontal vacuum quenching furnace (1) and is connected and fixedly connected to a filter chamber (6). The front inner side of the filter chamber (6) is damped and slidably fitted with a damping block (8). The front side of the damping block (8) is fixedly connected with a sealing plate (7). The sealing plate (7) is slidably fitted with the filter chamber (6) in the front and rear directions. Several filter plates (9) are inserted at equal intervals on the rear side of the sealing plate (7). The filter plates (9) are all fitted and slidably connected to the damping block (8) in the front and rear directions. The outer side of the filter plates (9) is slidably attached to the inner wall of the filter chamber (6). The top of the filter chamber (6) is connected to and fixed with an air collecting cylinder (10). The center of the top of the air collecting cylinder (10) is connected to and fixed with a vacuum conduit (11). The lower end of the opposite side of the vacuum conduit (11) is connected to the output port of the vacuum pump.

2. The vacuum air quenching furnace with air filtering structure according to claim 1, characterized in that, Each of the gas collecting cylinders (10) has a pressure gauge (12) fixedly connected to its front end.

3. The vacuum air quenching furnace with air filtering structure according to claim 1, characterized in that, The top of each gas collecting cylinder (10) is symmetrically connected to a connecting pipe (13) at the front and back, and the opposite ends of the connecting pipe (13) are connected to the vacuum conduit (11) and fixed.

4. The vacuum air quenching furnace with air filtering structure according to claim 1, characterized in that, The bottom outer side of the vacuum conduit (11) is threaded with a sealing ring (14), and the inner side of the sealing ring (14) is pressed and sealed against the outer side of the vacuum conduit (11) and the output port of the vacuum pump.

5. The vacuum air quenching furnace having an air filtering structure according to claim 1, wherein Each of the sealing plates (7) has a handle fixedly connected to the center of its front side, and each handle has a rubber sleeve nested in the middle of its outer side.

6. The vacuum air quenching furnace having an air filtering structure according to claim 1, wherein The bottom of the horizontal vacuum quenching furnace (1) is symmetrically fixed with bottom pads (15).

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