Filtering device of vacuum pump

Abstract

The utility model discloses a filtering device of a vacuum pump, which comprises a vacuum pump, a first filter and an oil path block, vacuum pump oil is arranged in the vacuum pump, the vacuum pump is provided with an oil inlet and an oil outlet, an input port of the first filter is communicated with the oil outlet, and the oil path block is provided with a first oil path and a second oil path. The first oil way is communicated with an output port of the first filter, an input port of the second filter is communicated with the first oil way, an output port of the second filter is communicated with the second oil way, and the second oil way is communicated with the oil inlet. The vacuum pump oil is secondarily filtered through the external filtering device, impurities in the vacuum pump oil can be effectively removed, the service life of the vacuum pump oil is prolonged, and a vacuum pump is prevented from being damaged; the whole structure is convenient to replace and maintain and low in cost; and the external filtering device is convenient for observing the oil condition of the vacuum pump and is also beneficial to improving the heat dissipation of the rotary vane pump.

Description

Technical Field

[0001] The utility model relates to the technical field related to filtering vacuum pumps, and in particular to a filtering device for a vacuum pump. Background Art

[0002] During epoxy resin vacuum casting, a vacuum system is used to evacuate and degas the epoxy resin and curing agent. During operation, the epoxy resin and curing agent emit a large amount of vapor (including epoxy monomer and volatile organic compounds) due to heating. This vapor is drawn into the system's rotary vane vacuum pump. The volatiles in the vapor mix with the vacuum pump oil, contaminating it and forming fixed particles. Over long-term use, these solid particles can cause wear or even blockage of the vacuum pump cavity and vanes. To avoid this, filters and vacuum pump oil must be replaced every two weeks on average, shortening equipment life and increasing maintenance costs.

[0003] In view of this, the inventors of the present application invented a filtering device for a vacuum pump. Utility Model Content

[0004] The utility model aims to provide an external vacuum pump filtering device which has a simple structure, can effectively prolong the service life of vacuum pump oil and has low cost.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a filtering device for a vacuum pump, comprising:

[0006] A vacuum pump, wherein the vacuum pump contains vacuum pump oil and is provided with an oil inlet and an oil outlet.

[0007] a first filter, wherein the input port of the first filter is connected to the oil outlet,

[0008] The oil circuit block is provided with a first oil circuit and a second oil circuit, wherein the first oil circuit is connected to the output port of the first filter,

[0009] A second filter, wherein an input port of the second filter is connected to the first oil circuit, an output port of the second filter is connected to the second oil circuit, and the second oil circuit is connected to the oil inlet.

[0010] Furthermore, the oil circuit block is fixed on the vacuum pump, the first filter is fixed on the oil circuit block, and the second filter is connected to the first oil circuit and the second oil circuit through an oil pipeline.

[0011] Furthermore, a clearance hole is provided in the middle of the oil circuit block, and the oil outlet is connected to a connector, which passes through the clearance hole and is connected to the input port of the first filter.

[0012] Furthermore, the oil outlet is provided with an extension pipe extending outward, and the joint, the extension pipe and the first filter are all threadedly connected and fixed.

[0013] Furthermore, the input port of the first filter is located in the middle, the first filter has multiple output ports and is arranged along the circumferential side of the first filter input port, and the end surface of the oil circuit block that fixes the first filter is provided with a first connection port connected to the first oil circuit, and the first connection port is connected to the output ports of all first filters.

[0014] Furthermore, a second connection port communicating with the second oil circuit is provided on the end surface of the oil circuit block fixed to the vacuum pump, and the second connection port is connected with the oil inlet.

[0015] Furthermore, a first interface and a second interface are provided on the side of the oil circuit block, which are respectively connected to the first oil circuit and the second oil circuit. The first interface and the second interface are both connected to the second filter through an oil pipeline.

[0016] After adopting the above technical solution, the utility model has the following advantages compared with the existing technology:

[0017] The utility model has a simple structure and a reasonable design. The vacuum pump oil is filtered twice by the external filter device, and impurities in the vacuum pump oil can be effectively removed, thereby extending the service life of the vacuum pump oil and avoiding damage to the vacuum pump; the overall structure is simple, and the replacement and maintenance are convenient, the performance is reliable, and the cost is low; the external filter device makes it easy to observe the condition of the vacuum pump oil, and also helps to cool the lubricating oil and improve the heat dissipation of the rotary vane pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a filtering device according to an embodiment of the present utility model;

[0019] Figure 2 、 Figure 3 This is an exploded view of the filter device according to an embodiment of the present utility model;

[0020] Figure 4 This is a cross-sectional view of the oil circuit block according to an embodiment of the utility model.

[0021] Description of reference numerals:

[0022] 10- Vacuum pump,

[0023] 11-Oil inlet, 12-Oil outlet, 13-Extension pipe, 14-Connector,

[0024] 20- first filter,

[0025] 21-input port of the first filter, 22-output port of the first filter,

[0026] 30-Oil block,

[0027] 31-first oil circuit, 311-first connection port, 312-first interface,

[0028] 32-second oil circuit, 321-second connection port, 322-second interface,

[0029] 33-Give way hole,

[0030] 40- Second filter,

[0031] 41-Oil pipeline. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] It should be noted that in the present invention, the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are all based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element of the present invention must have a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. Example

[0034] Cooperate Figures 1 to 4 As shown, the utility model discloses a vacuum pump filtering device, which is used for filtering vacuum pump oil in a vacuum pump 10 during epoxy resin vacuum casting, thereby preventing the vacuum pump oil from being contaminated, extending its service life, and reducing production costs.

[0035] Cooperate Figures 1 to 4 As shown, a filtering device for a vacuum pump includes:

[0036] The vacuum pump 10 contains vacuum pump oil and is provided with an oil inlet 11 and an oil outlet 12.

[0037] The first filter 20, the input port 21 of the first filter is connected to the oil outlet 12,

[0038] The oil passage block 30 is provided with a first oil passage 31 and a second oil passage 32. The first oil passage 31 is connected to the output port 22 of the first filter.

[0039] The second filter 40 has an input port connected to the first oil circuit 31 , an output port connected to the second oil circuit 32 , and the second oil circuit 32 connected to the oil inlet 11 .

[0040] Among them, the vacuum pump 10 is a rotary vane vacuum pump, and the vacuum pump oil is the lubricating oil in the vacuum pump 10. The vacuum pump oil enters and exits through the oil inlet 11 and the oil outlet 12 of the vacuum pump 10, flows out through the oil outlet 12 for filtration, and the filtered vacuum pump oil returns to the vacuum pump 10 through the oil inlet 11.

[0041] The first filter 20 is a built-in filtering device of the rotary vane vacuum pump 10. The details are not further described. The vacuum pump oil flowing out of the oil outlet 12 enters the first filter 20 for primary filtration. Specifically, the vacuum pump oil flowing out of the oil outlet 12 enters the first filter 20 through the first filter input port 21. The filtered oil is then discharged from the first filter 20 through the first filter output port 22.

[0042] The second filter 40 is used to perform a secondary filtration of the vacuum pump oil. The oil circuit block 30 mainly serves as a transfer and connection, receiving the vacuum pump oil filtered by the first filter 20 and delivering it to the second filter 40. Finally, the oil filtered by the second filter 40 is returned to the vacuum pump 10. Specifically, the oil circuit block 30 is provided with a first oil circuit 31 and a second oil circuit 32, and the first oil circuit 31 and the second oil circuit 32 are not connected to each other. The first oil circuit 31 is connected to the output port 22 of the first filter and the input port of the second filter 40, and the vacuum pump oil filtered by the first filter 20 is delivered to the second filter 40; the second oil circuit 32 is connected to the output port of the second filter 40 and the oil inlet 11 of the vacuum pump 10, and the vacuum pump oil filtered by the second filter 40 is delivered back to the vacuum pump 10 for use.

[0043] Cooperate Figures 2 to 4 As shown, the oil circuit block 30 is fixed to the vacuum pump 10, the first filter 20 is fixed to the oil circuit block 30, and the second filter 40 is connected to the first oil circuit 31 and the second oil circuit 32 via an oil pipe 41. Specifically, the oil circuit block 30 is block-shaped, with one end face sealingly fitted with the vacuum pump 10 and the other end face sealingly fitted with the first filter 20. A clearance hole 33 is provided in the middle of the oil circuit block 30, and a connector 14 is connected to the oil outlet 12. The connector 14 passes through the clearance hole 33 and is connected to the input port 21 of the first filter. The oil circuit block 30 is sealed to the vacuum pump 10 and the first filter 20. The vacuum pump oil at the oil outlet 12 enters the first filter 20 through the connector 14, and after being filtered once, it flows to the oil circuit block 30.

[0044] The oil outlet 12 is provided with an extension pipe 13 extending outward, and the connector 14 is threadedly connected to the extension pipe 13 and the first filter 20. This facilitates the installation and fixation of the oil block 30 and the first filter 20 and is easy to operate.

[0045] The first filter's inlet 21 is located in the center. Multiple first filter outlets 22 are located along the perimeter of the first filter's inlet. The end surface of the oil block 30, where the first filter 20 is secured, is provided with a first connection port 311 that communicates with the first oil circuit 31. This first connection port 311 is connected to all of the first filter's outlets 22. The first connection port 311 is located on the end surface of the oil block 30, and the clearance hole 33 extends through it. The first connection port 311 is large enough to connect to all of the first filter's outlets 22 simultaneously. It also serves as the inlet of the first oil circuit 31.

[0046] The end surface of the oil block 30 fixed to the vacuum pump 10 is provided with a second connection port 321 that communicates with the second oil circuit 32. The second connection port 321 is connected to the oil inlet 11. The second connection port 321 has a large diameter to ensure connection with the oil inlet 11. The second connection port 321 also serves as the output port of the second oil circuit 32.

[0047] The side of the oil circuit block 30 is provided with a first interface 312 and a second interface 322 which are connected to the first oil circuit 31 and the second oil circuit 32 respectively. The first interface 312 and the second interface 322 are both connected to the second filter 40 through the oil pipe 41. The first interface 312 and the second interface 322 are used to install and connect the oil pipe 41, and are also the output port of the first oil circuit 31 and the input port of the second oil circuit 32 respectively. Among them, the second filter 40 can adopt a low-cost activated carbon paper filter element, which can effectively reduce costs, achieve better filtering effects, and extend the service life of the vacuum pump oil. The oil pipe 41 adopts a high-temperature resistant transparent oil pipe, which can directly check the color of the vacuum pump oil and detect the contamination of the vacuum pump oil in time. The use of an external filter to filter the vacuum pump oil also helps to cool the lubricating oil and improve the heat dissipation of the rotary vane pump.

[0048] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A filter device for a vacuum pump, characterized in that: include: A vacuum pump, wherein the vacuum pump contains vacuum pump oil and is provided with an oil inlet and an oil outlet. a first filter, wherein the input port of the first filter is connected to the oil outlet, The oil circuit block is provided with a first oil circuit and a second oil circuit, wherein the first oil circuit is connected to the output port of the first filter, A second filter, wherein an input port of the second filter is connected to the first oil circuit, an output port of the second filter is connected to the second oil circuit, and the second oil circuit is connected to the oil inlet.

2. A vacuum pump filter device according to claim 1, characterized in that: The oil circuit block is fixed on the vacuum pump, the first filter is fixed on the oil circuit block, and the second filter is connected to the first oil circuit and the second oil circuit through an oil pipeline.

3. A filter device for a vacuum pump according to claim 2, characterized in that: A clearance hole is provided in the middle of the oil circuit block, and the oil outlet is connected to a connector, which passes through the clearance hole and is connected to the input port of the first filter.

4. A vacuum pump filter device according to claim 3, characterized in that: The oil outlet is provided with an extension pipe extending outward, and the joint, the extension pipe and the first filter are all threadedly connected and fixed.

5. The filter device for a vacuum pump according to claim 2, wherein: The input port of the first filter is located in the middle, the first filter has multiple output ports and are arranged along the circumferential side of the first filter input port, and a first connecting port connected to the first oil circuit is provided on the end surface of the oil circuit block fixing the first filter, and the first connecting port is connected to the output ports of all the first filters.

6. A filter device for a vacuum pump according to claim 5, characterized in that: A second connecting port communicating with the second oil circuit is provided on the end surface of the oil circuit block fixed to the vacuum pump, and the second connecting port is connected with the oil inlet.

7. A filter device for a vacuum pump according to any one of claims 2 to 6, characterized in that: A first interface and a second interface are provided on the side of the oil circuit block, which are respectively connected to the first oil circuit and the second oil circuit. The first interface and the second interface are both connected to the second filter through an oil pipeline.

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