CN219691751U

CN219691751U - Combined pump

Info

Publication number: CN219691751U
Application number: CN202320693523.3U
Authority: CN
Inventors: 黄建军; 李坤生
Original assignee: Liyuan Xiamen Technology Co ltd
Current assignee: Liyuan Xiamen Technology Co ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-09-15
Anticipated expiration: 2033-03-31

Abstract

The utility model provides a combined pump which comprises a frame, a Roots pump, a screw pump and a self-cleaning filter, wherein the Roots pump and the screw pump are respectively arranged on the frame in an up-down direction. The self-cleaning filter comprises an outer shell, a filter cartridge, an air inlet pipeline, an air outlet pipeline and an exhaust pipeline. The outer shell is provided with an inner cavity, an air inlet interface, a cleaning interface, an air outlet interface and an air exhaust interface. The filter cartridge is mounted in the interior cavity and interfaces the air intake interface and the air exhaust interface. One end of the air inlet pipeline is in butt joint with the air outlet of the Roots pump, the other end of the air inlet pipeline is in butt joint with the air inlet interface and the cleaning interface, and a switching valve is arranged. The air outlet pipeline is connected with the air inlet of the screw pump and the air outlet interface of the outer shell, and is provided with a first switch valve. One end of the exhaust pipeline is connected with an exhaust interface of the outer shell and is provided with a second switch valve. The filtering device arranged between the Roots pump and the screw pump has the advantages of simple structure, self-cleaning function, small size and meeting the compact installation requirement of the combined pump.

Description

Combined pump

Technical Field

The present utility model relates to a combination pump.

Background

The vacuum pump has many application occasions and large demand, and with the development of technology, a combined pump, such as a pump set which is formed by sequentially connecting a Roots pump and a screw pump in series, can greatly improve the working efficiency and the vacuum effect of the pump. However, in the use, easily appear in inhaling the screw pump with the dust in the air, at the fragile problem of screw pump, in order to solve above-mentioned problem, can add filter equipment in the current vacuum pump group, can filter the air that gets into the screw pump. However, the existing vacuum pump is generally compact in structure, so that the installation space between the Roots pump and the screw pump is small, the disassembly and assembly of the filter device are relatively inconvenient, trouble is brought to the cleaning of the filter device, and some filter devices with self-cleaning functions are arranged in the filter device, so that the whole filter device is large in size and difficult to install between the Roots pump and the screw pump due to the fact that the complicated self-cleaning structure is arranged in the filter device, and some peripheral filter devices are obviously not in line with the original purpose of compact structure and control of the size of the combined pump.

Disclosure of Invention

The utility model provides a combined pump for solving the technical problems, which comprises a frame, a Roots pump, a screw pump, a self-cleaning filter and a casing, wherein,

the Roots pump and the screw pump are respectively installed on the frame in the vertical direction, the top end of the self-cleaning filter is in butt joint with the air outlet of the Roots pump, the bottom end of the self-cleaning filter is in butt joint with the air inlet of the screw pump, the shell covers the frame and covers the frame, the Roots pump, the screw pump and the self-cleaning filter.

Specifically, the self-cleaning filter comprises an outer shell, a filter cartridge, an air inlet pipeline, an air outlet pipeline and an exhaust pipeline.

The shell body is provided with an inner cavity and is provided with an air inlet interface, a cleaning interface, an air outlet interface and an air exhaust interface. The air inlet interface and the cleaning interface are positioned at the top end of the outer shell, and the air outlet interface and the air exhaust interface are positioned at the bottom end of the outer shell.

The filter cartridge is arranged in the inner cavity, the top end is in butt joint with the air inlet interface, and the bottom end is in butt joint with the air outlet interface.

The top of the air inlet pipeline is abutted to the air outlet of the Roots pump, the bottom of the air inlet pipeline is provided with two branches, one branch is abutted to the air inlet interface of the outer shell, the other branch is abutted to the cleaning interface, and a switching valve is arranged between the two branches.

The air outlet pipeline is connected with the air inlet of the screw pump and the air outlet interface of the outer shell. The air outlet pipeline is provided with a first switch valve.

One end of the exhaust pipeline is connected with the exhaust interface of the outer shell, and the other end of the exhaust pipeline extends to the outside of the shell, so that dust can be discharged to the outside of the combined pump or discharged to dust collecting/cleaning equipment which is in butt joint with the outside of the combined pump. The exhaust pipeline is provided with a second switch valve.

During normal use, the switching valve is switched to be in butt joint with one path of the outer shell air inlet interface, the first switching valve is opened, the second switching valve is closed, at the moment, the Roots pump conveys sucked air into the screw pump, and the air is filtered by the self-cleaning filter. When the filter needs to be cleaned, the switching valve is switched to be in butt joint with one path of the cleaning interface, the first switching valve is closed, the second switching valve is opened, gas discharged by the Roots pump enters the filter through the cleaning interface and enters the filter cylinder from outside to inside, dust clamped on the inner side of the filter cylinder is blown off and blown out through the exhaust interface, and purging of the filter cylinder is achieved.

The filtering device arranged between the Roots pump and the screw pump has the advantages of simple structure, self-cleaning function, small size and meeting the compact installation requirement of the combined pump.

Preferably, the air inlet interface extends into the filter cylinder and is provided with a non-return assembly, so that dust can be prevented from flying into the air inlet interface when the filter cylinder is cleaned, and the problem of incomplete dust discharge is solved.

Preferably, the non-return assembly comprises a guide rod, a cover plate and a spring. The end part of the air inlet interface is provided with a mounting ring, and the mounting ring is provided with evenly distributed guide holes. The guide rods are consistent in number with the guide holes and slidably mounted on the respective perforations. The air inlet connector is characterized in that a pre-tightening spring is sleeved between one end of the guide rod and the mounting ring, the other end of the guide rod is connected with the cover plate, and the cover plate covers/opens the air inlet connector.

Preferably, a sealing ring is arranged between the mounting ring and the cover plate, so that the sealing degree can be improved.

Preferably, to avoid that the sealing ring is blown off, it is mounted on the side of the mounting ring. The mounting ring is provided with an annular groove facing the cover plate, and the sealing ring is arranged in the annular groove.

Preferably, the diameter of the annular groove is larger than the diameter of a ring surrounded by the guide rod, and when the sealing ring falls off, the sealing ring can be clamped on the guide rod and cannot fall off and interfere with a part at the bottom, for example, a self-cleaning part cannot rotate.

Preferably, the self-cleaning filter further comprises two pressure sensors respectively arranged on the inner side and the outer side of the filter cylinder, and whether the filter cylinder is seriously blocked or not is judged by comparing the pressures on the inner side and the outer side of the filter cylinder in real time.

Preferably, a brush cleaning assembly is arranged in the self-cleaning filter, and the brush cleaning assembly comprises a fan blade and a sweeping part. The exhaust port extends into the filter cartridge. The fan blades are rotatably arranged in the exhaust interface, and the rotating shaft is parallel to the shaft of the exhaust interface. The bottom of the sweeping part is connected with the rotating shaft of the fan blade, and is driven by the fan blade to rotate so as to sweep the inner wall of the filter cylinder.

Preferably, the sweeping member comprises a rotating rod, a support arm and a brush rod. The bottom of the rotating rod is fixed with the rotating shaft of the fan blade. The brush rod is arranged around the rotating rod by a plurality of brush rods, the outer side of the brush rod is provided with a brush and contacts with the inner wall of the filter cylinder, and the inner side of the brush rod is connected with the rotating rod through the support arm.

Preferably, in order to improve the installation stability of the rotating rod, the rotating rod extends upward and is rotatably abutted against the cover plate through a guide hole.

From the above description of the utility model, the utility model has the following advantages:

1. the filtering device between the Roots pump and the screw pump has simple structure, self-cleaning function and small size, and meets the compact installation requirement of the combined pump;

2. the non-return assembly is arranged at the air inlet interface, so that the problem of incomplete dust discharge caused by dust flying into the air inlet interface when the filter cartridge is cleaned can be prevented;

3. in order to avoid that the sealing ring is blown off, the sealing ring is arranged on one side of the mounting ring, in addition, the diameter of the sealing ring is larger than that of a ring surrounded by the guide rod, when the sealing ring falls off, the sealing ring can be clamped on the guide rod and cannot fall off and interfere with a part at the bottom, for example, a self-cleaning part cannot rotate;

4. the fan blade is arranged in the exhaust interface, so that the high-speed high-pressure air flow of the exhaust port can be utilized to drive the self-cleaning component, and the cleaning effect of the filter cylinder is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model.

Wherein:

FIG. 1 is an isometric view of a compound pump;

FIG. 2 is a second isometric view of a compound pump; (hidden case)

FIG. 3 is an isometric view of a combination pump; (hidden case)

FIG. 4 is a front view of a combination pump; (hidden case)

FIG. 5 is a side view of a combination pump; (hidden case)

FIG. 6 is a cross-sectional view of a combination pump; (hidden case)

FIG. 7 is an enlarged partial view of a combination pump; (hidden case)

FIG. 8 is a partial enlarged view of a combination pump; (hidden case)

FIG. 9 is a front view of a self-cleaning filter;

FIG. 10 is a cross-sectional view of a self-cleaning filter;

FIG. 11 is a second cross-sectional view of a self-cleaning filter;

FIG. 12 is a third cross-sectional view of a self-cleaning filter;

the identifiers in fig. 1 to 12 are respectively: the self-cleaning filter comprises a frame 1, a Roots pump 2, a screw pump 3, a self-cleaning filter 4, an outer shell 41, an air inlet port 411, a cleaning port 412, an air outlet port 413, an air outlet port 414, a filter cartridge 42, an air inlet pipeline 43, a switching valve 431, an air outlet pipeline 44, a first switch valve 441, an air outlet pipeline 45, a second switch valve 451, a guide rod 46, a cover plate 47, a fan blade 48, a cleaning member 49 and a shell 5.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear and obvious, the utility model 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 for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 12, a combination pump includes a frame 1, a roots pump 2, a screw pump 3, a self-cleaning filter 4, and a casing 5, wherein,

the Roots pump 2 and the screw pump 3 are respectively installed on the frame 1 in the up-down direction, the top end of the self-cleaning filter 4 is in butt joint with the air outlet of the Roots pump 2, the bottom end of the self-cleaning filter is in butt joint with the air inlet of the screw pump 3, the shell 5 covers the frame 1 and covers the frame 1, the Roots pump 2, the screw pump 3 and the self-cleaning filter 4.

Specifically, the self-cleaning filter 4 includes an outer housing 41, a filter cartridge 42, an inlet pipe 43, an outlet pipe 44, and an exhaust pipe 45.

The outer shell 41 is provided with an inner cavity, and is provided with an air inlet port 411, a cleaning port 412, an air outlet port 413 and an air outlet port 414. The air inlet 411 and the cleaning 412 are located at the top end of the outer housing 41, and the air outlet 413 and the air outlet 414 are located at the bottom end of the outer housing 41.

The filter cartridge 42 is mounted in the cavity with the top end abutting the inlet port 411 and the bottom end abutting the outlet port 414.

The top end of the air inlet pipeline 43 is abutted to the air outlet of the Roots pump 2, the bottom end of the air inlet pipeline is provided with two branches, one branch is abutted to the air inlet interface 411 of the outer shell 41, the other branch is abutted to the cleaning interface 412, and a switching valve 431 is arranged between the two branches.

The air outlet pipe 44 connects the air inlet of the screw pump 3 with the air outlet port 413 of the outer housing 41. The outlet pipe 44 is provided with a first switch valve 441.

The exhaust duct 45 has one end connected to the exhaust port 414 of the outer housing 41 and the other end extending to the outside of the housing 5, and is capable of discharging dust out of the combination pump or to a dust collecting/cleaning apparatus docked outside the combination pump. The exhaust duct 45 is provided with a second on-off valve 451.

In normal use, the switching valve 431 is switched to butt joint with one path of the air inlet port 411 of the outer casing 41, the first switch valve 441 is opened, the second switch valve 451 is closed, at this time, the Roots pump 2 sends the sucked air into the screw pump 3, and the air is filtered by the self-cleaning filter 4. When the filter needs to be cleaned, the switching valve 431 is switched to be in butt joint with one path of the cleaning interface 412, the first switching valve 441 is closed, the second switching valve 451 is opened, the gas discharged by the Roots pump 2 enters the filter through the cleaning interface 412 and enters the filter cartridge 42 from outside to inside, dust stuck on the inner side of the filter cartridge 42 is blown off and blown out through the exhaust interface 414, and the cleaning of the filter cartridge 42 is realized.

In order to avoid that a large amount of dust is hidden in the air inlet port 411 during the purging process of the filter cartridge 42, the air inlet port 411 extends into the filter cartridge 42 and is provided with a non-return component, so that the dust is prevented from flying into the air inlet port 411 when the filter cartridge 42 is cleaned, and a large amount of dust enters the screw pump 3 when the combined pump is restarted. In one embodiment, the backstop assembly includes a guide rod 46, a cover plate 47 and a spring. The end of the air inlet 411 is provided with a mounting ring, and the mounting ring is provided with evenly distributed guide holes. The guide rods 46 are identical in number to the guide holes and are slidably mounted on the respective bores. The pre-tightening spring is sleeved between one end of the guide rod 46 and the mounting ring, the other end of the guide rod is connected with the cover plate 47, and the cover plate 47 covers/opens the air inlet interface 411. In other embodiments, a sealing ring is provided between the mounting ring and the cover plate 47 to improve the sealing. Preferably, to avoid that the sealing ring is blown off, it is mounted on the side of the mounting ring. The mounting ring is provided with an annular groove facing the cover plate 47, in which groove the sealing ring is mounted. In addition, the diameter of the annular groove is larger than that of a ring surrounded by the guide rod 46, and when the sealing ring falls off, the sealing ring can be clamped on the guide rod 46 and cannot fall off and enter the screw pump 3.

In another embodiment, the self-cleaning filter 4 further includes two pressure sensors (not shown) disposed on the inner side and the outer side of the filter cartridge 42, respectively, and the pressure on the inner side and the outer side of the filter cartridge 42 is compared in real time to determine whether the filter cartridge 42 is severely clogged and needs cleaning.

In one embodiment, a brush cleaning assembly is disposed in the self-cleaning filter 4, and the brush cleaning assembly includes a fan blade 48 and a brush member 49. The exhaust port 414 extends into the filter cartridge 42. The fan blade 48 is rotatably mounted in the exhaust port 414, and the rotation axis is parallel to the axis of the exhaust port 414. The bottom of the sweeping member 49 is connected to the rotating shaft of the fan blade 48, and is driven by the fan blade 48 to rotate, so as to sweep the inner wall of the filter cartridge 42. Preferably, the sweeping member 49 includes a rotating lever, a support arm and a brush lever. The bottom end of the rotating rod is fixed with the rotating shaft of the fan blade 48. The brush rod is arranged around the rotating rod, the outer side of the brush rod is provided with a brush and contacts with the inner wall of the filter cylinder 42, and the inner side of the brush rod is connected with the rotating rod through the support arm. In another embodiment, to improve the mounting stability of the rotating rod, the rotating rod extends upward and is rotatably abutted against the cover plate 47 through a guide hole.

The filtering device arranged between the Roots pump 2 and the screw pump 3 has simple structure, self-cleaning function and small size, and meets the compact installation requirement of the combined pump.

While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the utility model is not limited to the above embodiments, but is capable of being modified or applied directly to other applications without modification, as long as various insubstantial modifications of the method concept and technical solution of the utility model are adopted, all within the scope of the utility model.

Claims

1. A combined pump comprises a frame, a Roots pump, a screw pump, a self-cleaning filter and a casing;

the Roots pump and the screw pump are respectively arranged on the frame in an up-down direction, the top end of the self-cleaning filter is in butt joint with the air outlet of the Roots pump, the bottom end of the self-cleaning filter is in butt joint with the air inlet of the screw pump, and the shell covers the frame and covers the frame, the Roots pump, the screw pump and the self-cleaning filter;

the self-cleaning filter is characterized by comprising an outer shell, a filter cartridge, an air inlet pipeline, an air outlet pipeline and an exhaust pipeline;

the outer shell is provided with an inner cavity and is provided with an air inlet interface, a cleaning interface, an air outlet interface and an air exhaust interface; the air inlet interface and the cleaning interface are positioned at the top end of the outer shell, and the air outlet interface and the air exhaust interface are positioned at the bottom end of the outer shell;

the filter cartridge is arranged in the inner cavity, the top end of the filter cartridge is in butt joint with the air inlet interface, and the bottom end of the filter cartridge is in butt joint with the air outlet interface;

the top end of the air inlet pipeline is in butt joint with the air outlet of the Roots pump, the bottom end of the air inlet pipeline is provided with two branches, one branch is in butt joint with the air inlet interface of the outer shell, the other branch is in butt joint with the cleaning interface, and a switching valve is arranged between the two branches;

the air outlet pipeline is connected with an air inlet of the screw pump and an air outlet interface of the outer shell; the air outlet pipeline is provided with a first switch valve;

one end of the exhaust pipeline is connected with the exhaust interface of the outer shell, and the other end of the exhaust pipeline extends to the outside of the shell and is provided with a second switch valve.

2. A combination pump as set forth in claim 1 wherein said air intake port extends into said filter cartridge and is provided with a non-return assembly.

3. A combination pump as set forth in claim 2 wherein said check assembly includes a guide rod, a cover plate and a spring; the end part of the air inlet interface is provided with a mounting ring, and the mounting ring is provided with evenly distributed guide holes; the number of the guide rods is consistent with that of the guide holes and the guide rods are slidably arranged on each punching hole; the air inlet connector is characterized in that a pre-tightening spring is sleeved between one end of the guide rod and the mounting ring, the other end of the guide rod is connected with the cover plate, and the cover plate covers/opens the air inlet connector.

4. A combination pump according to claim 3, wherein a sealing ring is provided between the mounting ring and the cover plate.

5. A combination pump as claimed in claim 4, wherein the mounting ring is provided with an annular groove facing the cover plate, the sealing ring being mounted in the annular groove.

6. A combination pump as set forth in claim 5 wherein said annular groove has a diameter greater than the diameter of the ring enclosed by said guide rod.

7. The combination pump of claim 1, wherein the self-cleaning filter further comprises two pressure sensors disposed on the inside and outside of the filter cartridge, respectively.

8. A combination pump as defined in claim 3, wherein a brush cleaning assembly is disposed within said self-cleaning filter, said brush cleaning assembly including fan blades and a sweeping member; the exhaust port extends into the filter cartridge; the fan blades are rotatably arranged in the exhaust interface, and the rotating shaft is parallel to the shaft of the exhaust interface; the bottom of the sweeping part is connected with the rotating shaft of the fan blade, and is driven by the fan blade to rotate so as to sweep the inner wall of the filter cylinder.

9. A combination pump as set forth in claim 8 wherein said sweeping member comprises a rotatable shaft, a support arm and a brush bar; the bottom end of the rotating rod is fixed with the rotating shaft of the fan blade; the brush rod is arranged around the rotating rod by a plurality of brush rods, the outer side of the brush rod is provided with a brush and contacts with the inner wall of the filter cylinder, and the inner side of the brush rod is connected with the rotating rod through the support arm.

10. A combination pump as set forth in claim 9 wherein said rotatable shaft extends upwardly and rotationally abuts said cover plate through a guide aperture.