Front filtering device of vacuum pump

Abstract

The invention relates to the technical field of separation, in particular to a vacuum pump front filtering device which comprises a filtering box, a box door, a fixed guide rail, a sliding filter element, a spring clamping block and a connecting pipe. The sliding filter element can be regularly replaced, the filtering effect of the filtering device is guaranteed, when the sliding filter element is replaced, the box door is turned over and opened to expose the sliding filter element in the filtering box, the spring clamping block is pulled to be separated from the sliding filter element and fixed in the filtering box, then the sliding filter element is pulled out of the fixed guide rail, at the moment, a new sliding filter element is inserted into the fixed guide rail, and the filtering effect of the filtering device is guaranteed. The sliding filter element is preliminarily limited through the fixed guide rail, finally, the spring clamping block slides reversely, the spring clamping block is reset and clamped with the sliding filter element, positioning of the sliding filter element, reverse rotation of the box door, closing of the filter box and replacement of the sliding filter element are achieved, when the sliding filter element is replaced, parts do not need to be disassembled with the help of tools, and replacement operation is convenient and fast.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of separation technology, in particular to a vacuum pump pre-filtering device. BACKGROUND

[0002] The material is discharged from the extruder of the sheet production line by vacuum pumping. The vacuum pump is used to form a certain vacuum degree in the hopper. The granules in the dryer are pumped into the vacuum hopper. In fact, a lot of dust is mixed in the raw material, so a filtering device is usually arranged between the vacuum pump and the feeding pipe to filter the impurities in the gas and protect the normal operation of the vacuum pump.

[0003] However, the filter element of the existing filtering device is easily blocked under high impurity conditions (such as an industrial environment with a lot of dust), and frequent shutdown and replacement are required. Since the installation structure of the filter element of the filtering device is complex, a plurality of components need to be disassembled, and the maintenance time is long, thereby reducing the production efficiency. SUMMARY

[0004] The purpose of the present application is to provide a vacuum pump pre-filtering device, which aims to solve the problem of the existing filtering device that needs to be replaced by disassembling a plurality of components, which takes a long time and reduces the production efficiency.

[0005] To achieve the above purpose, the present application provides a vacuum pump pre-filtering device, which comprises a filtering box, a box door, a fixed guide rail, a sliding filter element, a spring clamping block and a connecting pipe. The box door is rotatably connected with the filtering box and located outside the filtering box. The fixed guide rail is fixedly connected with the filtering box and located inside the filtering box. The sliding filter element is slidably connected with the fixed guide rail and located on one side of the fixed guide rail. The spring clamping block is arranged in the filtering box and clamped with the sliding filter element. The connecting pipe is in communication with the filtering box and located outside the filtering box.

[0006] The box door comprises a sealing gasket and a box door body. The box door body is rotatably connected with the filtering box and located outside the filtering box. The sealing gasket is fixedly connected with the box door body and located on one side of the box.

[0007] The sliding filter element comprises a filter element body, a sliding connecting plate and a pull ring. The sliding connecting plate is slidably connected with the fixed guide rail and located inside the fixed guide rail. The filter element body is fixedly connected with the sliding connecting plate and located on one side of the sliding connecting plate. The pull ring is fixedly connected with the sliding connecting plate and located on one side of the sliding connecting plate.

[0008] The fixed guide rail comprises a guide rail body and a positioning magnetic block, the guide rail body is fixedly connected with the filter box and located inside the filter box, and the positioning magnetic block is fixedly connected with the guide rail body and located on the inner side of the guide rail body.

[0009] The spring clamping block comprises a clamping block body, a spring rod and a fixed buckle, the spring rod is assembled on one side of the filter box, the clamping block body is fixedly connected with the spring rod and located on one side of the spring rod, and the fixed buckle is arranged on one side of the clamping block body and the filter box.

[0010] The spring rod comprises a telescopic guide rod and a spring, the telescopic guide rod is fixedly connected with the filter box and the clamping block body and located between the clamping block body and the telescopic guide rod, and the spring is sleeved on the outer side of the telescopic guide rod.

[0011] The connecting pipe comprises a connecting pipe body and an adapter, the connecting pipe body is communicated with the filter box and located on the outer side of the filter box, and the adapter is assembled on one side of the connecting pipe body.

[0012] The vacuum pump pre-filtering device of the application provides a mounting place for other mechanisms through the filter box, the connecting pipe is used for communicating the filter box with the vacuum pump, the filter box is used for pre-filtering when the vacuum pump is vacuumized, thereby avoiding dust from being sucked into the vacuum pump, the sliding filter element can be regularly replaced, the filtering effect of the filtering device is ensured, the sliding filter element is replaced by turning and opening the box door to expose the sliding filter element in the filter box, the spring clamping block is pulled to separate the spring clamping block from the sliding filter element and fix the spring clamping block in the filter box, the sliding filter element is pulled out of the fixed guide rail, a new sliding filter element is inserted into the fixed guide rail, the sliding filter element is preliminarily limited by the fixed guide rail, the spring clamping block is reversely slid to reset the spring clamping block and clamp the sliding filter element, the positioning of the sliding filter element is realized, the box door is reversely rotated to close the filter box, and the replacement of the sliding filter element is completed. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0014] Figure 1 This is a schematic diagram of the structure of a vacuum pump pre-filter device provided by the present invention.

[0015] Figure 2 This is a longitudinal sectional view of a vacuum pump pre-filter device provided by the present invention.

[0016] Figure 3 This is a longitudinal sectional view along the fixed guide rail direction of a vacuum pump pre-filter device provided by the present invention.

[0017] Figure 4 This is a longitudinal sectional view along the direction of the spring clip of a vacuum pump pre-filter device provided by the present invention.

[0018] Figure 5 yes Figure 4 A magnified view of detail A.

[0019] In the diagram: 1-Filter box, 2-Box door, 3-Fixed guide rail, 4-Sliding filter element, 5-Spring latch, 6-Connecting pipe, 21-Sealing gasket, 22-Box door body, 31-Guide rail body, 32-Positioning magnet, 41-Filter element body, 42-Sliding connecting plate, 43-Pull ring, 51-Latch body, 52-Spring rod, 53-Fixed buckle, 61-Connecting pipe body, 62-Adapter, 521-Telescopic guide rod, 522-Spring, 531-Snap-on, 532-Positioning bolt. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] Please see Figures 1 to 5 This invention provides a pre-filter for a vacuum pump, comprising a filter box 1, a door 2, a fixed guide rail 3, a sliding filter element 4, a spring clip 5, and a connecting pipe 6. The door 2 is rotatably connected to the filter box 1 and is located outside the filter box 1. The fixed guide rail 3 is fixedly connected to the filter box 1 and is located inside the filter box 1. The sliding filter element 4 is slidably connected to the fixed guide rail 3 and is located on one side of the fixed guide rail 3. The spring clip 5 is disposed inside the filter box 1 and engages with the sliding filter element 4. The connecting pipe 6 communicates with the filter box 1 and is located outside the filter box 1.

[0022] In this embodiment of the invention, the filter box 1 provides an installation location for the other mechanisms, and the connecting pipe 6 is used to connect the filter box 1 and the vacuum pump. When the vacuum pump is drawing a vacuum, pre-filtration is performed through the sliding filter element 4 inside the filter box 1, thereby preventing dust from being sucked into the vacuum pump. The sliding filter element 4 can be replaced periodically to ensure the filtration effect of the filtration device. When replacing the sliding filter element 4, the box door 2 is flipped open to expose the sliding filter element 4 inside the filter box 1. The spring clip 5 is pulled to separate the spring clip 5 from the sliding filter element 4 and fix it inside the filter box 1. Then the sliding filter element 4 is pulled... After removing the fixed guide rail 3, insert the new sliding filter element 4 into the fixed guide rail 3. The fixed guide rail 3 initially limits the sliding filter element 4. Finally, slide the spring clip 5 in the reverse direction to reset the spring clip 5 and engage the sliding filter element 4, thus positioning the sliding filter element 4. Rotate the box door 2 in the reverse direction to close the filter box 1, completing the replacement of the sliding filter element 4. When replacing the sliding filter element 4, there is no need to disassemble parts with tools. The replacement operation is convenient and quick, thus solving the problem that existing filtration devices require disassembly of multiple parts for replacement, which is time-consuming and reduces production efficiency.

[0023] Furthermore, the door 2 includes a sealing gasket 21 and a door body 22. The door body 22 is rotatably connected to the filter box 1 and is located outside the filter box 1. The sealing gasket 21 is fixedly connected to the door body 22 and is located on one side of the box.

[0024] In this embodiment of the invention, the sealing gasket 21 is provided to enhance the airtightness between the door body 22 and the filter box 1, so as to prevent the filter box 1 from leaking air when the vacuum pump is drawing a vacuum, thereby affecting the vacuum pump's vacuuming effect.

[0025] Furthermore, the sliding filter element 4 includes a filter element body 41, a sliding connecting plate 42, and a pull ring 43. The sliding connecting plate 42 is slidably connected to the fixed guide rail 3 and is located inside the fixed guide rail 3. The filter element body 41 is fixedly connected to the sliding connecting plate 42 and is located on one side of the sliding connecting plate 42. The pull ring 43 is fixedly connected to the sliding connecting plate 42 and is located on one side of the sliding connecting plate 42.

[0026] In this embodiment of the invention, the sliding connecting plate 42 has two pieces, which are respectively located on both sides of the filter element body 41. It is used to slide into the fixed guide rail 3, that is, to place the filter element body 41 in the filter box 1 to achieve the initial fixation of the filter element body 41. The pull ring 43 is provided so that the user can pull out the filter box 1 when disassembling and assembling the filter element body 41, thereby improving practicality.

[0027] Furthermore, the fixed guide rail 3 includes a guide rail body 31 and a positioning magnetic block 32. The guide rail body 31 is fixedly connected to the filter box 1 and is located inside the filter box 1. The positioning magnetic block 32 is fixedly connected to the guide rail body 31 and is located inside the guide rail body 31.

[0028] In this embodiment of the invention, the guide rail body 31 uses the positioning magnetic block 32 on its inner wall to adsorb and fix the sliding connecting plate 42, thereby fixing the sliding connecting plate 42 on the guide rail body 31 and achieving the initial fixation of the filter element body 41.

[0029] Furthermore, the spring latch 5 includes a latch body 51, a spring rod 52, and a fixing buckle 53. The spring rod 52 is assembled on one side of the filter box 1. The latch body 51 is fixedly connected to the spring rod 52 and located on one side of the spring rod 52. The fixing buckle 53 is disposed on one side of the latch body 51 and the filter box 1. The spring rod 52 includes a telescopic guide rod 521 and a spring 522. The telescopic guide rod 521 is fixedly connected to the filter box 1 and fixedly connected to the latch body 51, and located between the latch body 51 and the telescopic guide rod 521. The spring 522 is sleeved on the outside of the telescopic guide rod 521.

[0030] In this embodiment of the invention, the locking block body 51 is firmly pressed against the sliding connecting plate 42 by the reaction action of the spring rod 52, thereby locking the locking block body 51 and the sliding connecting plate 42. The fixing buckle 53 is provided to lock and fix the locking block body 51 when it is pulled apart from the sliding connecting plate 42, so as to prevent the spring rod 52 from pushing the locking block body 51 back to its original position when the filter element body 41 is disassembled and assembled, thus affecting the disassembly and assembly of the filter element body 41. The telescopic guide rod 521 of the spring rod 52 is used to guide the spring 522 when it is compressed or extended, so as to prevent the spring 522 from deflecting and bending when deformed, which would prevent the locking block body 51 from being unable to return to its original position.

[0031] Furthermore, the connecting pipe 6 includes a connecting pipe body 61 and an adapter 62. The connecting pipe body 61 is connected to the filter box 1 and is located outside the filter box 1. The adapter 62 is assembled on one side of the connecting pipe body 61.

[0032] In this embodiment of the invention, the connecting pipe body 61 is used for the filter box 1 and the vacuum pump. The adapter 62 allows the connecting pipe body 61 to be compatible with different models of vacuum pumps, thus improving its practicality.

[0033] Furthermore, the fixing buckle 53 includes a buckle 531 and a positioning bolt 532. The buckle 531 is fixedly connected to the block body 51 and is located on one side of the block body 51. The positioning bolt 532 is fixedly connected to the filter box 1 and engages with the block, and is located on one side of the filter box 1.

[0034] In this embodiment of the invention, the buckle 531 is fixed to the block body 51 by bolts. When disassembling the filter body 41, the user pulls the block body 51 to compress the telescopic guide rod 521 and the spring 522, so that the block and the positioning post are engaged, thereby fixing and limiting the block body 51. When the filter body 41 is replaced, the user pulls the block body 51 in the opposite direction, so that the positioning pin 532 and the buckle 531 are separated. At this time, the spring 522 resets and pushes the block body 51 to reset, so that the block body 51 firmly abuts against the sliding connecting plate 42, thereby fixing the filter body 41.

[0035] The above description is merely a preferred embodiment of a vacuum pump pre-filter device of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A pre-filter for a vacuum pump, Its characteristics are: Includes filter box, box door, fixed guide rail, sliding filter element, spring clip and connecting pipe; The door is rotatably connected to the filter box and is located outside the filter box. The fixed guide rail is fixedly connected to the filter box and is located inside the filter box. The sliding filter element is slidably connected to the fixed guide rail and is located on one side of the fixed guide rail. The spring clip is disposed inside the filter box and engages with the sliding filter element. The connecting pipe communicates with the filter box and is located outside the filter box.

2. The vacuum pump pre-filter as described in claim 1, characterized in that... ； The door includes a sealing gasket and a door body. The door body is rotatably connected to the filter box and is located outside the filter box. The sealing gasket is fixedly connected to the door body and is located on one side of the box.

3. The vacuum pump pre-filter as described in claim 1, characterized in that... ； The sliding filter element includes a filter element body, a sliding connecting plate, and a pull ring. The sliding connecting plate is slidably connected to the fixed guide rail and is located inside the fixed guide rail. The filter element body is fixedly connected to the sliding connecting plate and is located on one side of the sliding connecting plate. The pull ring is fixedly connected to the sliding connecting plate and is located on one side of the sliding connecting plate.

4. The vacuum pump pre-filter device as described in claim 1, characterized in that... ； The fixed guide rail includes a guide rail body and a positioning magnetic block. The guide rail body is fixedly connected to the filter box and is located inside the filter box. The positioning magnetic block is fixedly connected to the guide rail body and is located inside the guide rail body.

5. The vacuum pump pre-filter as described in claim 1, characterized in that... ； The spring clip includes a clip body, a spring rod, and a fixing buckle. The spring rod is assembled on one side of the filter box. The clip body is fixedly connected to the spring rod and located on one side of the spring rod. The fixing buckle is disposed on one side of the clip body and the filter box.

6. The vacuum pump pre-filter as described in claim 5, characterized in that... ； The spring rod includes a telescopic guide rod and a spring. The telescopic guide rod is fixedly connected to the filter box and to the block body, and is located between the block body and the telescopic guide rod. The spring is sleeved on the outside of the telescopic guide rod.

7. The vacuum pump pre-filter as described in claim 1, characterized in that... ； The connecting pipe includes a connecting pipe body and an adapter. The connecting pipe body is connected to the filter box and is located outside the filter box. The adapter is assembled on one side of the connecting pipe body.

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