Cock for centrifugal pump and centrifugal pump

Abstract

The utility model provides a rotary plug for a centrifugal pump and the centrifugal pump, the rotary plug is installed in a lubricating oil outlet hole in the bottom of a bearing box of the centrifugal pump, the rotary plug comprises a rotary plug body, a through hole extending in the axial direction of the rotary plug body and a valve hole extending in the radial direction of the rotary plug body are formed in the rotary plug body, and a valve is arranged in the valve hole; the screw cap assembly comprises a screw cap and a magnet detachably connected to one end of the screw cap, and the screw cap assembly is detachably inserted into the through hole of the cock body. According to the cock, in the operation process of the centrifugal pump, scrap iron in lubricating oil can be cleaned, operation of the centrifugal pump does not need to be stopped when the scrap iron is removed to the outside of the centrifugal pump, and the working efficiency of the centrifugal pump can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a plug for a centrifugal pump and the centrifugal pump. Background Art

[0002] During operation, friction between the bearings and the bearing housing creates iron chips, which mix into the lubricating oil and enter the bearings along with it. This affects the proper functioning of the bearings, shortens the oil change interval, and increases the maintenance cost of the centrifugal pump. To ensure the proper functioning of the centrifugal pump bearings, the lubricating oil must be frequently changed. However, before changing the oil, the equipment must be shut down, resulting in unnecessary downtime, disrupting normal production, and reducing work efficiency. Utility Model Content

[0003] In order to overcome the defects in the prior art, an embodiment of the present invention provides a plug for a centrifugal pump and a centrifugal pump, which can clean iron filings in the lubricating oil during the operation of the centrifugal pump, and there is no need to stop the operation of the centrifugal pump when the iron filings are removed to the outside of the centrifugal pump, thereby improving the working efficiency of the centrifugal pump.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The first aspect of the utility model discloses a plug for a centrifugal pump, wherein the plug is installed in an oil outlet hole at the bottom of a bearing box of the centrifugal pump, comprising:

[0006] A plug body, wherein the plug body is provided with a through hole extending along its axial direction and a valve hole extending along its radial direction, and a valve is provided in the valve hole;

[0007] The rotary cover assembly comprises a rotary cover and a magnet detachably connected to one end of the rotary cover. The rotary cover assembly is detachably inserted into the through hole of the tap body.

[0008] The above technical solution connects a magnet to the screw cap and removably inserts the magnet into the oil outlet hole. The magnet absorbs iron filings in the lubricating oil, thereby cleaning the lubricating oil. After the magnet absorbs a large amount of iron filings, the screw cap of the plug is rotated counterclockwise to withdraw the magnet from the bearing box. When the magnet retreats to below the valve hole position, the valve is closed and the screw cap is unscrewed to remove the magnet from the bearing box for cleaning. The above-mentioned plug arrangement can not only clean the iron filings in the bearing box, but also there is no need to stop the operation of the centrifugal pump when the magnet withdraws from the bearing box from the bottom of the bearing box. At the same time, it can avoid leakage of lubricating oil in the bearing box, which can improve the working efficiency of the centrifugal pump.

[0009] Furthermore, the plug body is provided with a sealing portion, located near the first end of the plug body. The first end of the plug body is inserted into the oil outlet hole, and the sealing portion is located outside the oil outlet hole and contacts the bearing housing shell. One end of the plug is inserted into the oil outlet hole, thereby blocking the oil outlet hole and preventing lubricating oil leakage. The sealing portion can seal the gap between the plug and the oil outlet hole, thereby improving the sealing ability of the plug and further preventing lubricating oil leakage.

[0010] Furthermore, a gasket is provided between the sealing portion and the bearing housing shell. The gasket can further improve the sealing degree and prevent lubricating oil from flowing from the bottom of the bearing housing to the outside.

[0011] Furthermore, the screw cap includes an extension portion and a stop portion, wherein a first end of the extension portion is connected to the stop portion and a second end extends in a direction perpendicular to the stop portion. The extension portion is configured to pass through a through hole in the plug body, thereby delivering the magnet into the bearing housing. The stop portion facilitates screwing the screw cap out of the plug body after the magnet has absorbed the iron filings.

[0012] Furthermore, the extension portion is provided with a mounting hole extending from the second end of the extension portion to the first end of the extension portion, and the magnet is mounted in the mounting hole. The mounting hole is provided to facilitate fixing the magnet on the extension portion and to facilitate removal and installation of the magnet.

[0013] Furthermore, one end of the magnet is mounted in the mounting hole, and the other end protrudes from the end surface of the second end of the extension portion, and the sum of the length of the magnet protruding from the extension portion and the length of the extension portion is greater than the axial length of the tap body, thereby enabling the magnet to absorb iron filings in the lubricating oil.

[0014] Furthermore, the radial extension length of the valve hole is greater than the diameter of the through hole, and the valve hole can pass through the through hole, so that the valve disposed in the valve hole can block the through hole, thereby preventing the lubricating oil in the bearing box from flowing out.

[0015] Furthermore, the tap body is provided with a connecting portion, one end of which is connected to the tap body and the other end of which extends away from the tap body. The connecting portion is provided with a connecting hole that communicates with the valve hole, and the valve is disposed in the connecting hole. The provided connecting portion facilitates the placement and installation of the valve.

[0016] Furthermore, the valve includes a valve stem and a handle. The valve can be opened and closed by rotating the handle, and the valve stem can block the through hole to prevent lubricating oil from flowing out of the bearing box.

[0017] A second aspect of the present invention discloses a centrifugal pump, which comprises a plug as described in any one of the first aspects.

[0018] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0019] The present application connects a magnet to a screw cap, which is detachably inserted into the lubricating oil outlet hole. The magnet absorbs iron filings in the lubricating oil, thereby cleaning the lubricating oil. After the magnet absorbs a large amount of iron filings, the screw cap of the plug is rotated counterclockwise to withdraw the magnet from the bearing box. When the magnet retreats to below the valve hole position, the valve is closed and the screw cap is unscrewed to remove the magnet from the bearing box for cleaning. The above-mentioned plug arrangement can not only clean the iron filings in the bearing box, but also there is no need to stop the operation of the centrifugal pump when the magnet exits the bearing box from the bottom of the bearing box. At the same time, it can avoid leakage of lubricating oil in the bearing box, thereby improving the working efficiency of the centrifugal pump.

[0020] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a cross-sectional view of a tap provided by an embodiment of the present utility model;

[0023] Figure 2 This is a cross-sectional view of a tap body provided by an embodiment of the present utility model;

[0024] Figure 3 This is a cross-sectional view of a rotary cap assembly provided by an embodiment of the present utility model;

[0025] Figure 4 This is a cross-sectional view of a plug provided by an embodiment of the present utility model installed at the bottom of a bearing box;

[0026] The figure marks in the above drawings are: 1. plug body; 2. screw cap assembly; 3. valve; 4. screw cap; 5. magnet; 6. sealing part; 7. gasket; 8. extension part; 9. stopper part; 10. connecting part; 11. valve stem; 12. handle; 13. bearing box. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In addition, the drawings of the present invention are only for simple schematic illustration and are not depicted according to actual size. Please note in advance.

[0028] In the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "forward", "back", "between", "close to", "far away" and the like indicate directions or positional relationships based on the directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. It should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 a direct connection or an indirect connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0029] It should be understood that although terms such as "first," "second," and "third" may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. In addition, the term "or" as used herein may include any one or more combinations of the associated listed items, as appropriate.

[0030] Reference Figure 1 As shown, an embodiment of the present application provides a plug for a centrifugal pump. When in use, the plug is installed in the oil outlet hole at the bottom of the bearing box 13 of the centrifugal pump. The plug includes: a plug body 1 and a screw cover assembly 2. The plug body 1 is provided with a through hole extending along its axial direction and a valve hole extending along its radial direction. A valve 3 is provided in the valve hole. The screw cover assembly 2 includes a screw cover 4 and a magnet 5 detachably connected to one end of the screw cover 4. The screw cover assembly 2 is detachably inserted into the through hole of the plug body 1.

[0031] With the above structure, during the operation of the centrifugal pump, the iron filings in the lubricating oil can be absorbed by the magnet 5 installed at the bottom of the bearing box 13. After the magnet 5 absorbs enough iron filings, the magnet 5 can be replaced by removing the plug, thereby cleaning the iron filings in the lubricating oil during the operation of the centrifugal pump without stopping the operation of the centrifugal pump. At the same time, it can avoid leakage of the lubricating oil in the bearing box 13, and can improve the working efficiency of the centrifugal pump.

[0032] Specifically, refer to Figure 1As shown, the plug body 1 is provided with a through hole extending along its axial direction and a valve hole extending along its radial direction. The through hole is used to insert the rotary cover assembly 2, and a valve 3 is provided in the valve hole.

[0033] The radial extension length of the valve hole is greater than the diameter of the through hole, and the valve hole can pass through the through hole, so that the valve 3 arranged in the valve hole can block the through hole, so that when the rotary cover assembly 2 retreats to the bottom of the valve hole, the valve 3 can pass through the through hole to form a blockage, thereby preventing the lubricating oil from leaking from the through hole.

[0034] In a possible embodiment, a connecting portion 10 is provided on the side of the tap body 1, one end of the connecting portion 10 is connected to the tap body 1, and the other end extends in a direction away from the tap body 1. A connecting hole connected to the valve hole is provided on the connecting portion 10. When the magnet 5 absorbs the lubricating oil, the valve 3 can be first set in the connecting hole.

[0035] like Figure 2 As shown, the valve 3 includes a valve stem 11 and a handle 12. The valve stem 11 is arranged in the connecting hole, and the handle 12 is located outside the connecting hole.

[0036] like Figure 1 、 Figure 2 and Figure 4 As shown, a sealing portion 6 is provided on the plug body 1, and the sealing portion 6 is arranged around the circumference of the plug body 1. The sealing portion 6 is arranged at a position close to the first end of the plug body 1, so that when the first end of the plug body 1 is inserted into the oil outlet hole, the sealing portion 6 is located outside the oil outlet hole and contacts the outer shell of the bearing box 13, thereby preventing the lubricating oil in the bearing box 13 from flowing out from the gap between the plug and the oil outlet hole.

[0037] In order to improve the sealing performance of the plug, Figure 4 As shown, in a possible embodiment, when the plug body 1 is inserted into the oil outlet hole, a gasket 7 is provided between the sealing portion 6 and the outer shell of the bearing box 13 .

[0038] Reference Figure 3 As shown, the rotary cover assembly 2 includes a rotary cover 4 and a magnet 5 detachably connected to one end of the rotary cover 4. The rotary cover 4 includes an extension portion 8 and a stop portion 9. The first end of the extension portion 8 is connected to the stop portion 9, and the second end extends in a direction perpendicular to the stop portion 9.

[0039] In order to mount the magnet 5 on the screw cap 4, as shown in FIG. Figure 3 As shown, the extension portion 8 is provided with a mounting hole extending from the second end of the extension portion 8 to the first end of the extension portion 8, and the magnet 5 is detachably embedded in the mounting hole.

[0040] In order to enable the magnet 5 to absorb iron filings in the lubricating oil, one end of the magnet 5 is installed in the mounting hole, and the other end protrudes from the end surface of the second end of the extension 8, and the sum of the length of the magnet 5 protruding from the extension 8 and the length of the extension 8 is greater than the axial length of the plug body 1. Therefore, when the rotary cover assembly 2 is inserted into the through hole in the plug body 1, the magnet 5 can extend into the interior of the bearing box 13, thereby more conveniently absorbing iron filings.

[0041] An embodiment of the present application further provides a centrifugal pump, which includes a plug as described in the above embodiment.

[0042] When the plug in the present application is in use, the plug is first inserted into the oil outlet hole at the bottom of the bearing box 13, so that the magnet 5 enters the lubricating oil, and the iron filings in the lubricating oil are absorbed by the magnet 5, thereby cleaning the lubricating oil. After the centrifugal pump has been running for a period of time, more iron filings will be absorbed by the magnet 5. At this time, the screw cover 4 is rotated counterclockwise to withdraw the magnet 5 from the bearing box 13. When the magnet 5 retreats to the bottom of the valve hole, the valve 3 is closed, and then the screw cover assembly 2 is completely unscrewed from the plug body 1, and then the magnet 5 is removed from the mounting hole for cleaning. In addition, the centrifugal pump is in operation during the process of the screw cover assembly 2 retreating from the inside of the bearing box 13 to the outside of the plug body 1.

[0043] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A plug for a centrifugal pump, characterized in that: The plug is installed in the oil outlet hole at the bottom of the centrifugal pump bearing box, and includes: A plug body, wherein the plug body is provided with a through hole extending along its axial direction and a valve hole extending along its radial direction, and a valve is provided in the valve hole; The rotary cover assembly comprises a rotary cover and a magnet detachably connected to one end of the rotary cover. The rotary cover assembly is detachably inserted into the through hole of the tap body.

2. A plug for a centrifugal pump according to claim 1, characterized in that: The plug body is provided with a sealing portion, which is arranged near the first end of the plug body. The first end of the plug body is inserted into the oil outlet hole. The sealing portion is located outside the oil outlet hole and contacts the bearing box shell.

3. A plug for a centrifugal pump according to claim 2, characterized in that: A gasket is also included, and the gasket is arranged between the sealing portion and the bearing box shell.

4. A plug for a centrifugal pump according to claim 1, characterized in that: The rotary cover includes an extending portion and a stopping portion. A first end of the extending portion is connected to the stopping portion, and a second end of the extending portion extends in a direction perpendicular to the stopping portion.

5. A plug for a centrifugal pump according to claim 4, characterized in that: The extension portion is provided with a mounting hole extending from the second end of the extension portion to the first end of the extension portion, and the magnet is mounted in the mounting hole.

6. A plug for a centrifugal pump according to claim 5, characterized in that: One end of the magnet is installed in the mounting hole, and the other end protrudes from the end surface of the second end of the extension part. The sum of the length of the magnet protruding from the extension part and the length of the extension part is greater than the axial length of the plug body.

7. A plug for a centrifugal pump according to claim 1, characterized in that: The radial extension length of the valve hole is greater than the diameter of the through hole, and the valve hole can pass through the through hole, so that the valve arranged in the valve hole can block the through hole.

8. The plug for a centrifugal pump according to claim 1, characterized in that: The plug body is provided with a connecting portion, one end of which is connected to the plug body and the other end extends in a direction away from the plug body. The connecting portion is provided with a connecting hole connected to the valve hole, and the valve is arranged in the connecting hole.

9. The plug for a centrifugal pump according to claim 1, characterized in that: The valve comprises a valve stem and a handle.

10. A centrifugal pump, characterized in that: The centrifugal pump comprises the plug according to any one of claims 1 to 9.

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