Maintenance and cleaning device for industrial dry vacuum pump

Abstract

The utility model discloses a cleaning device for maintaining an industrial dry vacuum pump, which comprises an air source end, the air source end comprises an air source and a first filter connected with the air source in series, the outlet end of the first filter is connected with a cleaning device through a connecting pipe, the cleaning device and the air source end form a cleaning system, and the cleaning system is connected with the air source end. The cleaning device comprises an air inlet pipeline and a washing agent pipeline, the cleaning device is connected to a 0.50-inch BSP accessory of a top stator body below a screw pump inlet adapter, circulating cleaning is conducted through the negative pressure of a pump, the air inlet pipeline comprises an air source and a first filter connected with the air source in series, and the washing agent pipeline is connected with the washing agent pipeline. The first filter is connected with an air inlet valve on the air inlet pipeline and a second filter, and the second filter is connected with the cleaning liquid control valve through a connecting pipeline.

Description

Technical Field

[0001] The utility model belongs to the field of VD furnace vacuum systems used in metallurgical steelmaking processes, and specifically relates to a maintenance and cleaning device for industrial dry vacuum pumps. Background Art

[0002] The VD furnace is equipped with a large square billet continuous casting machine to produce high-quality steel. The equipment and technology are provided by Maishuo Company. Since it was put into production, it has created huge profits for Baosteel. This system uses a steam jet pump as a vacuum pump, which was also the commonly used method at the time. Its biggest disadvantage is that the operating cost is extremely high, the steam consumption is large, the energy cost is high, and before each formal use, several furnaces must be tested to achieve the vacuum degree, which is especially serious for large tanks that have just been cleaned. The system operation is often affected by the quality of superheated steam, especially in winter when there are many steam users, and the temperature and pressure are unstable, resulting in the failure to achieve the vacuum degree. The maintenance cost is particularly high, and the nozzle needs to be removed for cleaning frequently.

[0003] Based on the above factors, the existing technology uses the VD furnace and its vacuum pump group for the VD furnace vacuum system in the metallurgical steelmaking process, wherein the VD furnace and its vacuum pump group is an industrial dry vacuum pump, and its three-stage pump is a screw vacuum pump. During use, the rotor is stuck and the machine stops many times, resulting in a high failure rate of the VD furnace.

[0004] In view of the above factors, a maintenance and cleaning device for industrial dry vacuum pumps is specially designed. The cleaning device is used to clean the inside of the industrial screw vacuum pump, thereby ensuring the cleanliness of the internal cavity and the rotor, thereby ensuring the internal fitting clearance, eliminating the rotor jamming due to dust accumulation, and thus improving the operating status of the equipment. Utility Model Content

[0005] The utility model aims to provide a maintenance and cleaning device for an industrial dry vacuum pump to solve the problems raised in the above-mentioned background technology.

[0006] The purpose of the utility model is achieved through the following technical solutions: a maintenance and cleaning device for an industrial dry vacuum pump, comprising an air source end, the air source end comprising an air source and a first filter arranged in series with the air source, the outlet end of the first filter being connected to the cleaning device through a connecting pipe;

[0007] The cleaning device and the gas source end form a cleaning system, the cleaning device includes an air intake pipeline and a detergent pipeline, the cleaning device is connected to the 0.50-inch BSP fitting on the top stator body below the screw pump inlet adapter, and uses the pump's own negative pressure for circulation cleaning.

[0008] Furthermore, the air intake pipeline includes an air source and a first filter arranged in series with the air source, the first filter is connected to the air intake valve and the second filter on the air intake pipeline, and the second filter is connected to the cleaning liquid control valve through a connecting pipeline.

[0009] Further, the second filter is a duct air filter, and the second filter is arranged in series with the intake valve;

[0010] The filtering accuracy of the second filter is higher than that of the first filter.

[0011] Furthermore, the first filter cyclone bag type dust collector has a filtration area of ​​356m 2 .

[0012] Further, the lotion pipeline is connected to the cleaning liquid control valve through a connecting pipe, and the cleaning liquid control valve is connected to a 0.50-inch BSP fitting of the top stator body below the screw pump inlet adapter.

[0013] Furthermore, the lotion pipeline is provided with a hose connected to the cleaning agent tank, and the lotion pipeline is provided with a hose connected to the pure water tank.

[0014] Furthermore, the cleaning device is connected to the screw pump for operation and the cleaning operation is performed when the screw pump frequency is 20 Hz.

[0015] Furthermore, the screw pump is electrically connected to a PLC controller via a connecting line, and the PLC controller is electrically connected to a cleaning liquid control valve and an air intake valve.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model solves the problem of rotor jamming of a dry vacuum pump, achieves the purpose of keeping the internal operating environment of the vacuum pump clean and dust-free, thereby reducing the failure rate of the dry vacuum pump, ensuring stable and smooth production, ensuring the cleanliness of the internal cavity and the rotor, and thus ensuring the internal matching clearance, eliminating rotor jamming due to dust accumulation, and thereby improving the operating state of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the air intake pipeline of the utility model;

[0020] Figure 3 This is a schematic diagram of the lotion pipeline of the utility model;

[0021] Figure 4 This is a schematic diagram of the utility model of a detergent pipeline connecting a detergent tank and a clean water tank;

[0022] Figure 5 This is a schematic diagram of the utility model PLC connected to the screw pump;

[0023] Figure 6 It is a control flow diagram of the utility model. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships 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 referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] like Figure 1-6 As shown, a maintenance and cleaning device for an industrial dry vacuum pump comprises an air source end 1, wherein the air source end 1 comprises an air source 3 and a first filter 4 arranged in series with the air source 3, and an outlet end of the first filter 4 is connected to a cleaning device 2 through a connecting pipe;

[0028] The cleaning device 2 and the air source end 1 form a cleaning system. The cleaning device 2 includes an air intake pipeline 6 and a detergent pipeline 7. The cleaning device 2 is connected to the 0.50-inch BSP fitting on the top stator body below the screw pump inlet adapter, and uses the pump's own negative pressure for circulation cleaning.

[0029] For the convenience of use, pressurizing the air source 3 can assist the solvent to flow to the screw pump in the pipeline, and can also prevent the solvent from flowing back to the air source 3. The air intake pipeline 6 includes the air source 3 and a first filter 4 arranged in series with the air source 3. The first filter 4 is connected to the air intake valve 8 and the second filter 9 on the air intake pipeline 6. The second filter 9 is connected to the cleaning liquid control valve 5 through a connecting pipeline.

[0030] In order to facilitate filtering in the use state, the second filter 9 is a pipeline air filter, and the second filter 9 is arranged in series with the intake valve 8;

[0031] The filtering accuracy of the second filter 9 is higher than that of the first filter 4 .

[0032] The first filter 4 is a cyclone bag type dust collector with a filtration area of ​​356m 2 .

[0033] The lotion pipeline 7 is connected to the cleaning liquid control valve 5 through a connecting pipe, and the cleaning liquid control valve 5 is connected to the 0.50-inch BSP fitting of the top stator body below the screw pump inlet adapter.

[0034] The detergent pipeline 7 is provided with a cleaning liquid filter, through which the solvent is filtered.

[0035] The lotion pipeline 7 is provided with a hose connected to the cleaning agent tank, and the lotion pipeline 7 is provided with a hose connected to the pure water tank.

[0036] The cleaning device 2 is connected to the screw pump and performs cleaning operations when the screw pump frequency is 20 Hz.

[0037] The screw pump is electrically connected to the PLC controller via a connecting line, and the PLC controller is electrically connected to the cleaning liquid control valve 5 and the air intake valve 8 .

[0038] The utility model uses various valves to connect steel pipes and pneumatic hoses to form different system pipelines, and the cleaning device is arranged as follows: Figure 1-5 After the connections are assembled as shown, prepare Loctite 7840 cleaning agent and pure water. Connect the hose to the cleaning agent. Connect the cleaning liquid control valve to the 0.50-inch BSP fitting on the top stator body below the screw pump inlet adapter. Prepare solution A (mixture of 1 liter of pure water and 4 liters of 7840 cleaning agent) and solution B (5 liters of pure water). Start the screw pump and run it stably at 20Hz. Remove the exhaust plug below the screw pump. After the connections are completed, follow the steps as shown below. Figure 6 The cleaning operation is performed according to the flowchart.

[0039] By designing a cleaning device and matching it with a standard operating procedure, the cleanliness inside the screw pump chamber can be greatly improved, the debris that has been residual and accumulated inside the pump chamber for a long time can be removed, the matching accuracy between the rotors can be improved to ensure the matching clearance, and the increase in the operating resistance of the pump due to insufficient clearance can be prevented, thereby causing equipment failure.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A maintenance and cleaning device for an industrial dry vacuum pump, comprising a gas source end (1), characterized in that: The air source end (1) comprises an air source (3) and a first filter (4) arranged in series with the air source (3); the outlet end of the first filter (4) is connected to the cleaning device (2) via a connecting pipe; The cleaning device (2) and the air source end (1) form a cleaning system, and the cleaning device (2) includes an air intake pipeline (6) and a detergent pipeline (7). The cleaning device (2) is connected to the 0.50-inch BSP fitting of the top stator body below the screw pump inlet adapter, and uses the pump's own negative pressure for circulation cleaning.

2. The maintenance and cleaning device for industrial dry vacuum pumps according to claim 1, characterized in that: The air intake pipeline (6) comprises an air source (3) and a first filter (4) arranged in series with the air source (3); the first filter (4) is connected to an air intake valve (8) and a second filter (9) on the air intake pipeline (6); and the second filter (9) is connected to a cleaning liquid control valve (5) via a connecting pipeline.

3. The maintenance and cleaning device for industrial dry vacuum pumps according to claim 2, characterized in that: The second filter (9) is a duct air filter, and the second filter (9) is arranged in series with the air intake valve (8); The filtering accuracy of the second filter (9) is higher than the filtering accuracy of the first filter (4).

4. The maintenance and cleaning device for industrial dry vacuum pumps according to claim 3 is characterized in that: The first filter (4) is a cyclone bag type dust collector with a filtration area of ​​356m 2 .

5. The maintenance and cleaning device for industrial dry vacuum pumps according to claim 4, characterized in that: The detergent pipeline (7) is connected to the cleaning liquid control valve (5) through a connecting pipe, and the cleaning liquid control valve (5) is connected to the 0.50-inch BSP fitting of the top stator body below the screw pump inlet adapter.

6. The maintenance and cleaning device for industrial dry vacuum pumps according to claim 5, characterized in that: The lotion pipeline (7) is provided with a hose connected to the cleaning agent tank, and the lotion pipeline (7) is provided with a hose connected to the pure water tank.

7. The maintenance and cleaning device for industrial dry vacuum pumps according to claim 6, characterized in that: The cleaning device (2) is connected to the screw pump for operation and performs cleaning operations when the screw pump frequency is 20 Hz.

8. The maintenance and cleaning device for industrial dry vacuum pumps according to claim 7, characterized in that: The screw pump is electrically connected to the PLC controller via a connecting line, and the PLC controller is electrically connected to the cleaning liquid control valve (5) and the air intake valve (8).

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