A novel evacuation assembly

Abstract

A novel vacuum assembly includes a multi-port fitting, with its ports connected to a first control valve, a second control valve, and a filter tube, respectively, and other ports sealed by removable plugs. The end of the first control valve furthest from the multi-port fitting is connected to a reference connecting pipe, which is also connected to a reference pump. The end of the second control valve furthest from the multi-port fitting is connected to a main connecting pipe, and the multi-port fitting also has a parallel pipe controlled by an independent valve body connected to the main connecting pipe. Both the main connecting pipe and the reference connecting pipe are connected to a secondary pump, and the first and second control valves do not open simultaneously. The filter tube is connected to an external vacuum pump unit. The main connecting pipe and the reference connecting pipe have the same diameter, but the diameter of the main connecting pipe is larger than that of the parallel pipe, and the diameter of the filter tube is larger than that of the main connecting pipe. By setting up parallel pipes and pipes of different diameters, vacuum operations with different gradients can be achieved under different requirements.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pipeline technology, specifically a novel vacuum assembly. Background Technology

[0002] Vacuuming assemblies for vacuuming operations typically include a vacuum pump unit and connecting pipes. They function once the connecting pipes are connected to the equipment to be evacuated. To protect the vacuum pump unit, the connecting pipes are usually equipped with filters. While these filters can filter particulate matter, they need to be cleaned after prolonged use. Furthermore, if a segmented, incremental increase in vacuum pressure is used, a large amount of particulate matter can be prevented from entering the connecting pipes at the start of the vacuuming operation. However, existing vacuuming assemblies do not have the aforementioned segmented adjustment capability. For example, there are floating particles in the vacuum heating chamber of a vacuum powder sintering furnace. If these particles directly enter the pump body, they can cause significant damage. Therefore, it is essential to prevent particles from entering the pipeline and to filter them before vacuuming to protect the pump body. Utility Model Content

[0003] To address the aforementioned problem of the lack of an adjustable evacuation assembly structure, this invention provides a novel evacuation assembly.

[0004] The technical solution of this utility model is as follows: A novel evacuation assembly includes a multi-port fitting, wherein the ports of the multi-port fitting are respectively connected to a first control valve, a second control valve and a filter pipe, and the other ports are sealed by removable plugs. The end of the first control valve away from the multi-port fitting is connected to a reference connecting pipe, which is also connected to a reference pump; The end of the second control valve away from the multi-way fitting is connected to the main connecting pipe, and the multi-way fitting is also provided with a parallel pipe controlled by an independent valve body connected to the main connecting pipe; Both the main connecting pipe and the reference connecting pipe are connected to the secondary pump, and the first control valve and the second control valve are not opened at the same time. The filter tube is connected to an external vacuum pump assembly. The main connecting tube and the reference connecting tube have the same diameter. The diameter of the main connecting tube is larger than that of the parallel tube, and the diameter of the filter tube is larger than that of the main connecting tube.

[0005] By setting up parallel pipelines and pipelines of different diameters, different functions and different methods of vacuuming operations can be achieved through control valves under different needs.

[0006] To avoid mutual interference, the reference pump can only be turned on when the first control valve is closed.

[0007] To ensure a continuous passage, the parallel pipe can connect the main connecting pipe and the multi-way fitting when the second control valve is closed.

[0008] To reduce the impact of particulate matter, the interface between the reference pump and the reference connecting pipe is positioned higher than the connection between the reference connecting pipe and the secondary pump.

[0009] As a preferred embodiment, the diameter of the parallel pipe is larger than the diameter of the pipe connecting the reference pump and the reference connecting pipe.

[0010] For better filtration, the height plane of the filter tube is lower than that of the multi-port fitting and the main connecting pipe.

[0011] The connection method between the reference connecting pipe and the secondary pump is as follows: a reducing pipe is provided at the lower end of the reference connecting pipe to connect with the secondary pump, and the diameter of the reducing pipe is smoothly transitioned, with the diameter of the end away from the reference connecting pipe being larger than the diameter of the end closer to the reference connecting pipe.

[0012] To facilitate control of the parallel tube, the parallel tube is equipped with an independent control valve.

[0013] To avoid affecting the normal use of the equipment due to filter tube problems, the multi-port fitting has at least two ports with filter tubes connected to the external vacuum pump group, and only one of the two filter tubes is in a connected state at the same time.

[0014] Specifically, the new evacuation assembly is connected to the vacuum heating chamber of the vacuum powder sintering furnace via a secondary pump to form an evacuation assembly for the vacuum powder sintering furnace.

[0015] The beneficial effects of this utility model are as follows: This utility model is a novel vacuum assembly, which differs from conventional connecting pipe designs. First, the application of a reference pump and reference connecting pipe that can operate independently ensures the driving effect of the secondary pump. Then, the main vacuum operation is carried out through the main connecting pipe that is set in parallel with the external vacuum pump group. Moreover, the above structure includes a parallel pipe structure with a small diameter. Therefore, based on the above structure, gradient-level vacuum operation can be carried out by using the reference pump, parallel pipe and normal main connecting pipe at the same time. And throughout the process, a structure to suppress particulate matter from entering the pump body is adopted simultaneously. Attached Figure Description

[0016] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a schematic diagram of the structure of this utility model (after connection with the secondary pump); Figure 4 This is a top view of the structure of this utility model (after connection with the secondary pump); The components represented by the various reference numerals in the diagram are: 1. Multi-port fitting; 2. First control valve; 3. Reference connecting pipe; 4. Reference pump; 5. Filter pipe; 6. Parallel pipe; 7. Second control valve; 8. Main connecting pipe; 9. Secondary pump. Detailed Implementation

[0018] Example like Figure 1-4 The present invention discloses a novel evacuation assembly, comprising a multi-port fitting 1 having multiple ports, each with the same diameter. The ports of the multi-port fitting 1 are connected to a first control valve 2, a second control valve 7, and a filter pipe 5, respectively. By controlling the opening and closing of the control valves, the flow of each different pipe can be controlled to achieve the desired effect. In order to avoid the influence of unsealed ports, the other ports are sealed by removable plugs. After the plugs are removed, the functions can be expanded to ensure that the evacuation assembly can achieve more effects.

[0019] Subsequently, the end of the first control valve 2 away from the multi-way fitting 1 is connected to the reference connecting pipe 3. The first control valve 2 can control the opening and closing of the reference connecting pipe 3 and the multi-way fitting 1, thereby enabling the selection of specific operating methods according to requirements. Furthermore, the reference connecting pipe 3 is also connected to a reference pump 4, which can be used independently in conjunction with the secondary pump through the reference connecting pipe 3 when the first control valve 2 is closed.

[0020] Furthermore, the end of the second control valve 7 furthest from the multi-way fitting 1 is connected to the main connecting pipe 8, and the multi-way fitting 1 is also provided with a parallel pipe 6 controlled by an independent valve body connected to the main connecting pipe 8; in the above structure, both the main connecting pipe 8 and the reference connecting pipe 3 are connected to the secondary pump 9, which is a diffusion pump 9. In use, the corresponding control valve 7 can be opened and closed to perform the operation. Moreover, the setting of the parallel pipe 6 can change the working pipe diameter to achieve a gradient vacuuming effect. It should be noted that the first control valve 2 and the second control valve 7 are not opened at the same time to avoid control problems. That is to say, the reference pump 4 can play an independent role. In order to ensure the normal vacuuming operation of the main connecting pipe 8, the filter pipe 5 is connected to an external vacuum pump group. The vacuum pump group is used to complete the vacuuming operation normally. It can be opened after the reference pump 4 is closed and the first control valve 2 is closed. After it is opened, the vacuum pump group can cooperate with the main connecting pipe 8 to act on the secondary pump. In this process, only the state of the second control valve 7 needs to be changed to switch different working pipe diameters, thereby achieving the effect of gradient adjustment.

[0021] During the process, to ensure a continuous flow, the parallel pipe 6 can connect the main connecting pipe 8 and the multi-way fitting 1 when the second control valve 7 is closed. That is, regardless of whether the second control valve 7 is closed, it can connect to the multi-way fitting 1, although the diameter of the connected pipes differs, thus affecting the actual vacuuming capacity. Furthermore, in this structure, the parallel pipe 6 is equipped with an independent control valve for convenient control. When it is necessary to completely block the passage, the independent control valve can be closed to restrict the parallel pipe 6, and the multi-way fitting 1 can be directly connected to the main connecting pipe 8 without being affected by the parallel pipe 6.

[0022] Therefore, the main connecting pipe 8 and the reference connecting pipe 3 have the same diameter, the diameter of the main connecting pipe 8 is larger than that of the parallel pipe 6, the diameter of the filter pipe 5 is larger than that of the main connecting pipe 8, and the diameter of the parallel pipe 6 is larger than that of the pipe connecting the reference pump 4 and the reference connecting pipe 3. In this manner, the opening sequence is as follows: the reference pump 4 is opened and the first control valve 2 is closed; then the external vacuum pump group is opened, the reference pump 4 is closed, and the second control valve 7 is closed. Vacuuming is then performed through the parallel pipe 6. After a period of time, the second control valve 7 is opened to perform vacuuming at maximum power.

[0023] The above structure can achieve the following: by setting up six parallel pipes and pipes of different diameters, different functions can be achieved by controlling the control valve under different needs and performing different vacuuming operations. Furthermore, the step-by-step vacuuming operation can avoid the generation of a large amount of particulate matter in the initial stage, thus avoiding affecting the use of the pump body.

[0024] Because there are two pump bodies, to avoid mutual interference, the reference pump 4 can only be turned on when the first control valve 2 is closed. This ensures that the pump unit connected to the filter pipe 5 will not be affected and will function normally.

[0025] In a preferred embodiment, to reduce the impact of particulate matter, the interface between the reference pump 4 and the reference connecting pipe 3 is positioned higher than the connection between the reference connecting pipe 3 and the secondary pump 9. This prevents particulate matter from entering the reference pump 4 under lower evacuation pressure. Correspondingly, for better filtration, the height plane of the filter pipe 5 is lower than that of the multi-port fitting 1 and the main connecting pipe 8. This also helps to avoid the impact of particulate matter to a certain extent, i.e., during the initial stage of vacuuming.

[0026] Furthermore, to avoid affecting the normal use of the equipment due to problems with the filter tube 5, the multi-port fitting 1 has at least two ports with filter tubes 5 connected to the external vacuum pump group, and only one of the two filter tubes 5 is in a connected state at the same time. If a filter tube 5 has a problem, it can be replaced in time and avoid affecting the vacuuming operation.

[0027] Finally, the connection between the reference connecting pipe 3 and the secondary pump 9 is as follows: a reducing pipe is provided at the lower end of the reference connecting pipe 3 to connect to the secondary pump 9, and the diameter of the reducing pipe transitions smoothly, with the diameter of the end farther from the reference connecting pipe 3 being larger than the diameter of the end closer to the reference connecting pipe 3. This method facilitates the backflow of particles.

[0028] Finally, the novel evacuation assembly is connected to the vacuum heating chamber of the vacuum powder sintering furnace via a secondary pump to form an evacuation assembly for the vacuum powder sintering furnace. After connecting it to the vacuum heating chamber of the vacuum powder sintering furnace via the secondary pump, namely the diffusion pump 9, vacuuming is performed by sequentially opening different valves and switching different pumps. The first switch is performed when the vacuum level is below about 10,000 Pa, and the second switch is performed when the vacuum level is below about 100 Pa, until the second control valve 7 is finally opened to ensure that the vacuum pump group performs vacuuming operation with maximum efficiency through the main connecting pipe. Through the above gradient switching, it is possible to minimize the risk of floating particles being drawn into the pipeline and into the pump body. Moreover, this evacuation assembly is not limited to vacuum powder sintering furnaces; it can also be applied to other equipment that contains particulate matter but requires vacuuming operation.

Claims

1. A novel evacuation assembly, characterized in that, It includes a multi-port fitting, the ports of which are respectively connected to a first control valve, a second control valve and a filter pipe, and the other ports are sealed by a removable plug. The end of the first control valve away from the multi-port fitting is connected to a reference connecting pipe, which is also connected to a reference pump; The end of the second control valve away from the multi-way fitting is connected to the main connecting pipe, and the multi-way fitting is also provided with a parallel pipe controlled by an independent valve body connected to the main connecting pipe; Both the main connecting pipe and the reference connecting pipe are connected to the secondary pump, and the first control valve and the second control valve are not opened at the same time. The filter tube is connected to an external vacuum pump assembly. The main connecting tube and the reference connecting tube have the same diameter. The diameter of the main connecting tube is larger than that of the parallel tube, and the diameter of the filter tube is larger than that of the main connecting tube.

2. The novel evacuation assembly according to claim 1, characterized in that, The reference pump can only be turned on when the first control valve is closed.

3. The novel evacuation assembly according to claim 1, characterized in that, The parallel pipe can connect the main connecting pipe and the multi-port fitting when the second control valve is closed.

4. The novel evacuation assembly according to claim 1, characterized in that, The interface between the reference pump and the reference connecting pipe is located higher than the connection point between the reference connecting pipe and the secondary pump.

5. A novel evacuation assembly according to claim 1, characterized in that, The diameter of the parallel tube is larger than the diameter of the tube connecting the reference pump and the reference connecting tube.

6. A novel evacuation assembly according to claim 1, characterized in that, The plane at which the filter tube is located is lower than the multi-port fitting and the main connecting pipe.

7. A novel evacuation assembly according to claim 1, characterized in that, The lower end of the reference connecting pipe is provided with a reducing pipe that connects to the secondary pump, and the diameter of the reducing pipe transitions smoothly, with the diameter of the end away from the reference connecting pipe being larger than the diameter of the end closer to the reference connecting pipe.

8. A novel evacuation assembly according to claim 1, characterized in that, The parallel tube is equipped with an independent control valve.

9. A novel evacuation assembly according to claim 1, characterized in that, The multi-port fitting has at least two ports equipped with filter pipes that are connected to an external vacuum pump unit, and only one of the two filter pipes is in a connected state at any given time.

10. A novel evacuation assembly according to any one of claims 1-9, characterized in that, The novel evacuation assembly is connected to the vacuum heating chamber of the vacuum powder sintering furnace via a secondary pump, forming an evacuation assembly for the vacuum powder sintering furnace.

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