A vacuum furnace air extraction filter

Abstract

This utility model discloses a vacuum furnace gas extraction filter, comprising: a vacuum pump connecting pipe, a connecting bolt assembly sleeved at the end of the vacuum pump connecting pipe, a filter pipe sleeved on the outer wall of the connecting bolt assembly, and a vacuum furnace connecting pipe at the end of the filter pipe away from the vacuum pump connecting pipe. In use, the vacuum furnace connecting pipe and the vacuum pump connecting pipe are connected by the connecting bolt assembly and the filter pipe. The vacuum pump connected to the end of the vacuum pump connecting pipe extracts gas from the vacuum furnace connected to the end of the vacuum furnace connecting pipe through the vacuum pump connecting pipe, the filter pipe, and the vacuum furnace connecting pipe. Under the filtration limitation of the filter unit, the gas entering the vacuum pump connected to the end of the vacuum pump connecting pipe can be filtered. Under the limitation of the filter unit, filtration and self-cleaning effects can be achieved. Under the limitation of the sealing unit, the vacuum pump connecting pipe, the filter pipe, and the vacuum furnace connecting pipe are sealed to each other.

Description

Technical Field

[0001] This utility model relates to the field of vacuum furnace extraction and filtration technology, and in particular to an extraction filter for a vacuum furnace. Background Technology

[0002] A vacuum furnace is an industrial thermal equipment that creates and maintains a vacuum environment within a furnace chamber, and uses heating to process workpieces inside the furnace for heat treatment, sintering, brazing, melting, coating, and other processes. The vacuum environment isolates the workpiece from air, preventing oxidation, nitriding, and carbonization reactions during high-temperature processing. Simultaneously, it allows for precise control of the furnace temperature, pressure, and gas composition, enabling accurate regulation of workpiece performance. A vacuum furnace extraction filter is a specialized device installed in the vacuum furnace's extraction system to filter out solid particles, dust, metal debris, volatile condensates, and other impurities generated during the extraction process. This prevents these impurities from entering the vacuum pump or vacuum pipeline, avoiding problems such as pump wear, pipeline blockage, and decreased vacuum levels. This ensures the normal operation of the vacuum furnace, extends equipment lifespan, and guarantees the quality of workpieces processed within the furnace.

[0003] Existing vacuum furnaces do not readily filter gas during the evacuation process, which can easily lead to particulate impurities in the gas entering the vacuum pump. Over time, this can cause blockage and damage to the pump body, resulting in a decrease in vacuum level.

[0004] Therefore, a vacuum furnace extraction filter is needed to solve the above problems. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] In view of the problems of the above-mentioned vacuum furnace suction filter, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a vacuum furnace gas extraction filter, which solves the problem that "existing vacuum furnaces are inconvenient to filter gas during the gas extraction process, which easily leads to particulate impurities in the gas entering the vacuum pump, causing the pump body to become blocked and damaged over time, resulting in a decrease in vacuum level".

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a vacuum furnace suction filter, comprising:

[0009] A vacuum pump connecting pipe is provided with a connecting bolt assembly at its end, a filter pipe is provided on the outer wall of the connecting bolt assembly, and a vacuum furnace connecting pipe is provided at the end of the filter pipe away from the vacuum pump connecting pipe.

[0010] The filter unit is placed inside the filter tube. The filter unit includes a push rod, a filter disc and a brush plate. It is used to filter the gas entering the vacuum pump through the filter disc, and then clean the filter disc and prevent it from clogging through the push rod and the brush plate to avoid particulate impurities from damaging the vacuum furnace pump.

[0011] A sealing unit is placed to the side of the filter unit. The sealing unit includes a sealing ring and a sealing groove, which are used to seal the connection between the vacuum pump connecting pipe, the filter pipe and the vacuum furnace connecting pipe to prevent air leakage during pumping and improve the pumping effect.

[0012] As a preferred embodiment of the vacuum furnace extraction filter of this utility model, the filter unit includes a fixing block fixedly installed on the inner wall of the filter tube, a first magnetic ring fixedly installed on the side wall of the fixing block, a sliding rod slidably arranged inside the fixing block, a second magnetic ring fixedly installed at the end of the sliding rod, a push plate fixedly installed on the side wall of the second magnetic ring, a through hole opened inside the push plate, a push rod fixedly installed on the side of the push plate away from the second magnetic ring, and a filter plate inserted into the outer wall of the push rod.

[0013] In a preferred embodiment of the vacuum furnace suction filter of this utility model, the filter disc is rotatably connected to a rotating column on the side away from the pusher disc, a fan blade is fixedly installed on the outer wall of the rotating column, a fixing rod is fixedly installed at the end of the rotating column, and a brush plate is fixedly installed at the end of the fixing rod.

[0014] As a preferred embodiment of the vacuum furnace gas extraction filter of this utility model, the outer wall of the filter disc is fixedly installed with the inner wall of the filter tube, and the filter disc has filter holes inside. Under the restriction of the filter disc, the gas entering the vacuum pump can be filtered.

[0015] As a preferred embodiment of the vacuum furnace suction filter described in this utility model, the brush plate is slidably arranged with the filter disc, and there are three brush plates distributed circumferentially with the rotating column as the center. Under the constraint of the rotating brush plates, they can brush and clean the outer wall of the filter disc.

[0016] As a preferred embodiment of the vacuum furnace suction filter of the present invention, the sealing unit includes a groove formed at the end of the filter tube, a first magnetic ring fixedly installed on the inner wall of the groove, a second magnetic ring slidably arranged inside the groove, a sealing ring fixedly installed on the side wall of the second magnetic ring, and a sealing groove formed at the end of the vacuum pump connecting pipe.

[0017] As a preferred embodiment of the vacuum furnace suction filter of this utility model, the sealing ring has an arc-shaped end and the inner wall of the sealing groove has an arc-shaped surface. The sealing ring and the sealing groove are fitted together, which can improve the sealing effect between the vacuum pump connecting pipe, the filter pipe and the vacuum furnace connecting pipe.

[0018] In a preferred embodiment of the vacuum furnace suction filter described in this utility model, the second magnetic ring and the first magnetic ring are magnetically repulsive, and the outer wall of the sealing ring is slidably disposed inside the groove. Under the restriction of magnetic repulsion, the sealing ring that is not compressed can be reset and pushed so that the sealing ring is fitted with the sealing groove.

[0019] The beneficial effects of this utility model are as follows: During gas extraction, the vacuum pump works, and the push plate is driven by suction to move the slide rod, causing the push rod to disengage from the filter hole of the filter plate. The gas is filtered by the filter plate and enters the through hole. At the same time, the airflow drives the fan blade to rotate, and the brush plate is rotated through the rotating column and the fixed rod to clean one side of the filter plate and prevent blockage. After the gas extraction is completed, the push plate is reset under the repulsive force of the first and second magnetic rings, and the push rod is inserted into the filter hole to clean impurities. The impurities in the filter tube can be discharged by opening the slag discharge plate. This structure achieves gas filtration through the filter plate and completes self-cleaning by combining the push rod and the brush plate, which facilitates the cleaning of impurities.

[0020] When installing the filter tube, the arc surface of the sealing ring is pressed against the end of the connecting tube, and then resets under the repulsive force of the first and second magnetic rings, fitting into the sealing groove to achieve a sealed connection. When disassembling, simply remove the connecting bolt group and allow the arc surface of the sealing ring to slide away from the sealing groove. This structure can prevent air leakage at the end of the filter tube and facilitates disassembly and deep cleaning. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0022] Figure 1 This is a schematic diagram of the main structure of a vacuum furnace extraction filter according to the present invention.

[0023] Figure 2 This is a schematic diagram of the filter unit and sealing unit of a vacuum furnace extraction filter according to the present invention.

[0024] Figure 3 This is a schematic diagram of the filter unit structure of a vacuum furnace suction filter according to the present invention.

[0025] Figure 4This is an exploded structural diagram of the filter unit of a vacuum furnace extraction filter according to the present invention.

[0026] Figure 5 This is a schematic diagram of the sealing unit structure of a vacuum furnace extraction filter according to the present invention.

[0027] Figure 6 This is an exploded cross-sectional view of the sealing unit of a vacuum furnace extraction filter according to the present invention.

[0028] Figure Descriptions: 100, Vacuum pump connecting pipe; 101, Connecting bolt assembly; 102, Filter pipe; 103, Vacuum furnace connecting pipe; 200, Filter unit; 300, Sealing unit; 201, Fixing block; 202, First magnetic ring; 203, Slide rod; 204, Second magnetic ring; 205, Push plate; 206, Through hole; 207, Push rod; 208, Filter plate; 209, Rotating column; 210, Fan blade; 211, Fixing rod; 212, Brush plate; 301, Slide groove; 302, First magnetic ring; 303, Second magnetic ring; 304, Sealing ring; 305, Sealing groove. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0032] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0033] Example 1

[0034] Reference Figure 1 and Figure 2This is the first embodiment of the present invention, which provides a vacuum furnace suction filter, comprising:

[0035] A vacuum pump connecting pipe 100 is provided with a connecting bolt group 101 at the end of the vacuum pump connecting pipe 100. A filter pipe 102 is provided on the outer wall of the connecting bolt group 101. A vacuum furnace connecting pipe 103 is provided at the end of the filter pipe 102 away from the vacuum pump connecting pipe 100.

[0036] The filter unit 200 is placed inside the filter tube 102. The filter unit 200 includes a push rod 207, a filter disc 208 and a brush plate 212. It is used to filter the gas entering the vacuum pump through the filter disc 208, and then clean and prevent the filter disc 208 from clogging through the push rod 207 and the brush plate 212 to avoid particulate impurities from damaging the vacuum furnace pump.

[0037] The sealing unit 300 is located on the side of the filter unit 200. The sealing unit 300 includes a sealing ring 304 and a sealing groove 305, which are used to seal the connection between the vacuum pump connecting pipe 100, the filter pipe 102 and the vacuum furnace connecting pipe 103 to prevent air leakage during pumping and improve the pumping effect.

[0038] In use, the vacuum furnace connecting pipe 103 is connected to the vacuum pump connecting pipe 100 via the connecting bolt assembly 101 and the filter pipe 102. The vacuum pump connected to the end of the vacuum pump connecting pipe 100 pumps air into the vacuum furnace connected to the end of the vacuum furnace connecting pipe 103 through the vacuum pump connecting pipe 100, the filter pipe 102 and the vacuum furnace connecting pipe 103. Under the filtration restriction of the filter unit 200, the gas entering the vacuum pump connected to the end of the vacuum pump connecting pipe 100 can be filtered. Under the restriction of the filter unit 200, filtration and self-cleaning effects can be achieved. Under the restriction of the sealing unit 300, the vacuum pump connecting pipe 100, the filter pipe 102 and the vacuum furnace connecting pipe 103 are sealed together.

[0039] Example 2

[0040] Reference Figure 3 and Figure 4 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment is further optimized based on the above embodiment, as follows:

[0041] The filter unit 200 includes a fixing block 201 fixedly installed on the inner wall of the filter tube 102. A first magnetic ring 202 is fixedly installed on the side wall of the fixing block 201. A slide rod 203 is slidably arranged inside the fixing block 201. A second magnetic ring 204 is fixedly installed at the end of the slide rod 203. A push plate 205 is fixedly installed on the side wall of the second magnetic ring 204. A through hole 206 is opened inside the push plate 205. A push rod 207 is fixedly installed on the side of the push plate 205 away from the second magnetic ring 204. A filter plate 208 is inserted into the outer wall of the push rod 207. A rotating column 209 is rotatably connected to the side of the filter plate 208 away from the push plate 205. A fan blade 210 is fixedly installed on the outer wall of the rotating column 209. A fixing rod 211 is fixedly installed at the end of the rotating column 209. A brush plate 212 is fixedly installed at the end of the fixing rod 211.

[0042] The outer wall of the filter disc 208 is fixedly installed on the inner wall of the filter tube 102. The filter disc 208 has filter holes inside, which can filter the gas entering the vacuum pump under the restriction of the filter disc 208.

[0043] The brush plate 212 is slidably arranged with the filter disc 208. There are three brush plates 212, which are distributed in a circle with the rotating column 209 as the center. Under the constraint of the rotating brush plate 212, it can brush and clean the outer wall of the filter disc 208.

[0044] During use, when evacuating the vacuum furnace, the vacuum pump can be used for vacuum treatment. To prevent particulate impurities from entering the vacuum furnace into the pump body, filtration is required. When the vacuum pump connecting pipe 100 evacuates the filter pipe 102, it pulls the push plate 205. The slide rod 203 fixedly installed on the side wall of the push plate 205 slides inside the fixed block 201, causing the push plate 205 to move away from the push rod 207 fixedly installed on the side wall of the slide rod 203. The push rod 207 is no longer inserted into the filter hole inside the filter plate 208, and gas flows through the through hole 206. At this time, gas filtration can be performed through the filter plate 208. When the gas is evacuated, the fan blade 210 will rotate, which will drive the rotating column 209 to rotate. The fixed rod 211 fixedly installed at the end of the rotating column 209 will drive the brush plate 212 to rotate, thus filtration of the filter plate. Clean the side of 208 away from the push plate 205 to avoid clogging by particulate impurities. After the vacuum is exhausted, the push plate 205 is no longer affected by the vacuum. Under the magnetic repulsion of the first magnetic ring 202 and the second magnetic ring 204, the push plate 205 is reset, allowing the push rod 207 to be inserted into the filter plate 208. This pushes and cleans the filter holes inside the filter plate 208 to prevent clogging by impurities. At this time, the slag discharge plate at the bottom of the filter tube 102 is opened to clean the impurities filtered inside the filter tube 102, ensuring that the filter tube 102 and the filter plate 208 can perform gas filtration. This structure can perform gas filtration through the filter plate 208. With the push rod 207 and the brush plate 212, the filter plate 208 can be self-cleaned. Under the restriction of the slag discharge plate, the particulate impurities accumulated inside the filter tube 102 can be cleaned.

[0045] Example 3

[0046] Reference Figure 5 and Figure 6 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment is further optimized based on the above embodiments, as detailed below:

[0047] The sealing unit 300 includes a groove 301 opened at the end of the filter tube 102. A first magnetic ring 302 is fixedly installed on the inner wall of the groove 301. A second magnetic ring 303 is slidably arranged inside the groove 301. A sealing ring 304 is fixedly installed on the side wall of the second magnetic ring 303. A sealing groove 305 is opened at the end of the vacuum pump connecting pipe 100.

[0048] The sealing ring 304 has an arc-shaped end and the inner wall of the sealing groove 305 has an arc-shaped inner wall. The sealing ring 304 and the sealing groove 305 are fitted together. Under their constraints, the sealing effect between the vacuum pump connecting pipe 100, the filter pipe 102 and the vacuum furnace connecting pipe 103 can be improved.

[0049] The second magnetic ring 303 and the first magnetic ring 302 are magnetically repulsive. The outer wall of the sealing ring 304 is slidably disposed inside the groove 301. Under the restriction of magnetic repulsion, the sealing ring 304, which is not compressed, can be reset and pushed so that the sealing ring 304 is fitted with the sealing groove 305.

[0050] During use, when the filter tube 102 is installed with the vacuum pump connecting pipe 100 and the vacuum furnace connecting pipe 103, the arc surface of the sealing ring 304, which is slidably disposed inside the filter tube 102, is pressed against the ends of the vacuum pump connecting pipe 100 and the vacuum furnace connecting pipe 103. This causes the sealing ring 304 to drive the second magnetic ring 303 to slide into the sliding groove 301. When the sealing ring 304 is aligned with the sealing groove 305, under the magnetic repulsion constraint between the first magnetic ring 302 and the second magnetic ring 303, the sealing ring 304 can be... 04. Reset push to make the sealing ring 304 fit with the sealing groove 305, so that the vacuum pump connecting pipe 100, filter pipe 102 and vacuum furnace connecting pipe 103 are sealed to each other. If the filter pipe 102 has been used for a long time, the connecting bolt group 101 can be removed, the filter pipe 102 can be removed and thoroughly cleaned, so that the arc surface of the sealing ring 304 slides and squeezes the arc surface inside the sealing groove 305, and the filter pipe 102 can be disassembled. This structure can prevent air leakage at the end of the filter pipe 102 when evacuating vacuum.

[0051] It is worth noting that the entire device is controlled by a controller. Since the controller is a common device and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0052] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine task in design, manufacturing, and production without requiring extensive experimentation.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An exhaust filter for a vacuum furnace, characterized by, include: A vacuum pump connecting pipe (100) is provided with a connecting bolt group (101) at the end of the vacuum pump connecting pipe (100), and a filter pipe (102) is provided on the outer wall of the connecting bolt group (101). A vacuum furnace connecting pipe (103) is provided at the end of the filter pipe (102) away from the vacuum pump connecting pipe (100). The filter unit (200) is placed inside the filter tube (102). The filter unit (200) includes a push rod (207), a filter disc (208) and a brush plate (212). It is used to filter the gas entering the vacuum pump through the filter disc (208), and then clean and prevent the filter disc (208) from clogging through the push rod (207) and the brush plate (212) to avoid particulate impurities from damaging the vacuum furnace pump. A sealing unit (300) is placed on the side of the filter unit (200). The sealing unit (300) includes a sealing ring (304) and a sealing groove (305) for sealing the vacuum pump connecting pipe (100), the filter pipe (102) and the vacuum furnace connecting pipe (103) to prevent air leakage during pumping and improve the pumping effect.

2. A filter according to claim 1, characterized in that: A filter unit (200) includes a fixing block (201) fixedly installed on the inner wall of a filter tube (102). A first magnetic ring (202) is fixedly installed on the side wall of the fixing block (201). A slide rod (203) is slidably arranged inside the fixing block (201). A second magnetic ring (204) is fixedly installed at the end of the slide rod (203). A push plate (205) is fixedly installed on the side wall of the second magnetic ring (204). A through hole (206) is opened inside the push plate (205). A push rod (207) is fixedly installed on the side of the push plate (205) away from the second magnetic ring (204). A filter plate (208) is inserted into the outer wall of the push rod (207).

3. A filter according to claim 2, characterized in that: The filter disc (208) is rotatably connected to a rotating column (209) on the side away from the pusher disc (205). A fan blade (210) is fixedly installed on the outer wall of the rotating column (209). A fixing rod (211) is fixedly installed at the end of the rotating column (209). A brush plate (212) is fixedly installed at the end of the fixing rod (211).

4. A filter according to claim 2, characterized in that: The outer wall of the filter disc (208) is fixedly installed on the inner wall of the filter tube (102), and the filter disc (208) has filter holes inside.

5. A filter according to claim 3, characterized in that: The brush plate (212) is slidably arranged with the filter disc (208). There are three brush plates (212) distributed in a circle with the rotating column (209) as the center.

6. A filter according to claim 1, characterized in that: A sealing unit (300) includes a groove (301) opened at the end of the filter tube (102), a first magnetic ring (302) is fixedly installed on the inner wall of the groove (301), a second magnetic ring (303) is slidably arranged inside the groove (301), a sealing ring (304) is fixedly installed on the side wall of the second magnetic ring (303), and a sealing groove (305) is opened at the end of the vacuum pump connecting pipe (100).

7. A filter according to claim 6, characterized in that: The end of the sealing ring (304) is arc-shaped, the inner wall of the sealing groove (305) is arc-shaped, and the sealing ring (304) is matched and sleeved with the sealing groove (305).

8. A filter according to claim 6, characterized in that: The second magnetic ring (303) and the first magnetic ring (302) are magnetically repelled, and the outer wall of the sealing ring (304) is slidably arranged in the sliding groove (301).

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