CN213118419U

CN213118419U - Oil level indicator for lubricating oil of centrifugal pump

Info

Publication number: CN213118419U
Application number: CN202021892126.1U
Authority: CN
Inventors: 胡纪全; 李志富; 万里; 谢丹林; 姚国军; 陆华勇
Original assignee: China Petroleum and Chemical Corp
Current assignee: China Petroleum and Chemical Corp
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2021-05-04
Anticipated expiration: 2030-09-02

Abstract

The utility model discloses an oil level indicating oil pointer of centrifugal pump lubricating oil, which comprises an oil pointer communicating vessel, an oil pointer base and an oil pointer main body, wherein the oil pointer communicating vessel comprises a connecting pipe, a metal corrugated hose and a pressure-resisting pipe for fixing the metal corrugated pipe on the connecting pipe; the oil pointer base comprises a base body and an L-shaped flow passage arranged in the base body, wherein an upper connecting hole and a lower connecting hole which are communicated with the flow passage are formed in the base body, and a connecting pipe is screwed in the upper connecting hole; the oil pointer main body comprises an oil pointer pipe extending along the vertical direction and a fixed pipe for connecting the oil pointer pipe on the lower connecting hole, at least part of the oil pointer pipe is accommodated in an inner hole of the fixed pipe, and an inner cavity of the oil pointer pipe is communicated with the atmosphere; the oil level gauge pipe is a transparent pipe, one side of the fixed pipe is provided with a window, and a scale is arranged on the window; the lower end face of the metal corrugated hose is not higher than the lowest scale mark of the scale. This application can really reflect the height state of lubricating oil liquid level in the bearing box, and the leakproofness is good, and is visual strong, is convenient for install and remove, conveniently clears up the grease.

Description

Oil level indicator for lubricating oil of centrifugal pump

Technical Field

The utility model relates to an oil level indicator of centrifugal pump lubricating oil.

Background

Before the centrifugal pump operates, the lubricating oil level in the bearing box needs to be checked through an oil pointer, and the safety of long-term operation of the pump is ensured. The oil pointer is used for truly reflecting the liquid level of lubricating oil in the bearing box, and if the visibility of the oil pointer of the pump is poor, oil dirt is easily accumulated in the oil pointer, and the sealing property is poor, the judgment of an operator on the actual liquid level of the lubricating oil in the bearing box of the pump can be seriously influenced, and the safe operation of the pump is influenced. In addition, if the opening of the oil pointer window of the bearing box is unreasonable, the oil pointer cannot truly reflect the lubricating oil level in the bearing box, and the lubricating oil level state in the bearing box is easily judged by mistake. The reasonability of oil pointer window design determines the liquid level of the added lubricating oil, the unreality of oil level reflected by the oil pointer, poor visibility and other problems, and is a hidden danger of mechanical pump safety accidents, so that more reasonable oil pointers are needed.

The liquid level display of the existing centrifugal pump bearing box usually adopts a conventional diameter oil pointer and a U-shaped pipe oil pointer. Conventional diameter oil pointer, its liquid level show generally adopts 20 ~ 30 mm's diameter oil pointer, and the inside easy long-pending greasy dirt of oil pointer is not convenient for clear up in the use, needs often to change, and the diameter is little is not convenient for see the clear oil level. The oil pointer of the U-shaped pipe is not firmly connected, has poor sealing performance, is easy to damage and is easy to drip oil. At present, no effective solution exists for the problems of unreasonable positions of too high or too low opening holes of the oil pointer window, poor visibility and the like.

The existing centrifugal pump oil pointer, such as a conventional diameter oil pointer and a U-shaped pipe oil pointer, is easy to accumulate oil dirt inside, poor in visibility and sealing performance, and easy to drip oil, and the oil pointer needs to be replaced integrally frequently. In addition, when the oil level in the bearing box is reduced to a certain degree when the oil level of the U-shaped pipe is used, the oil level reflected by the oil level is a false liquid level, and potential safety hazards exist. Therefore, under the above conditions, the lubricating oil in the bearing box of the pump is easy to be found out when the lubricating oil is lack of oil, so that the bearing is burnt out, the safe and stable operation of the pump is affected, and the improvement of the oil pointer is urgently needed.

The unreasonable position that some existing centrifugal pump bearing box oil pointer windows open pores are too high or too low can not truly reflect the lubricating oil liquid level state in the bearing box. If the opening is too high, the liquid level of a lubricating oil level observation window is low under normal conditions, so that the lubricating oil level in the bearing box is easily judged by an operator by mistake, lubricating oil is excessively supplemented, and the phenomenon of oil throwing is easily caused when a pump runs. Too much or too little lubricating oil in the bearing box can cause the machine pump trouble, and lubricating oil is too much, and the machine pump can appear getting rid of oil at high-speed operation in-process to can take place the siphon effect, lead to the lubricating failure of machine pump bearing, the dry friction of lack of oil appears, and the high bearing that easily leads to of frictional heating is damaged, takes place the conflagration even. Lubricating oil is frequently and repeatedly added after the pump runs for a long time, so that not only is the lubricating oil wasted, but also the environment is polluted, and great potential safety hazards exist. Therefore, if the problem of oil throwing caused by overhigh opening of the lubricating oil scale window of the pump bearing box cannot be solved in time, the labor intensity of workers is increased, too much oil is added, the bearing and lubricating oil are easy to generate heat by friction to cause the overheating phenomenon of the bearing, and the pump sealing damage is easy to cause in long-term operation.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the utility model provides an oil level indicating oil pointer of centrifugal pump lubricating oil, which comprises an oil pointer communicating vessel, an oil pointer seat and an oil pointer main body, wherein the oil pointer communicating vessel comprises a connecting pipe, a metal corrugated hose and a pressure resisting pipe, two ends of the connecting pipe are respectively formed into a first connecting end and a second connecting end, a necking part is formed on the inner wall of the connecting pipe, and the end surface of the necking part facing to the first connecting end is formed into a pressure resisting surface;

the two ends of the metal corrugated hose are respectively formed into a box body extending end and an oil level connecting end, the end part of the oil level connecting end is provided with a flange which extends outwards along the radial direction, and the flange of the oil level connecting end is positioned in the connecting pipe and positioned on one side of the necking part facing the first connecting end; the extending end of the box body extends out of the connecting pipe from the second connecting end and then extends downwards; the pressing pipe is screwed into the inner cavity of the connecting pipe through the first connecting end, the flange of the oil pointer connecting end is pressed against the pressing surface, and the pressing pipe is pressed against the flange of the oil pointer connecting end in a sealing manner;

the oil pointer base comprises a base body and a flow channel arranged in the base body, wherein the base body comprises a base and an upright part formed by upwards extending one end of the base, the flow channel is L-shaped, one end of the flow channel is positioned at the upper end of the upright part, the other end of the flow channel is positioned in the base, an upper connecting hole communicated with the flow channel is arranged at the upper end of the upright part, the upper connecting hole is arranged at one side of the upright part, which is far away from the base, a lower connecting hole communicated with the flow channel is arranged on the base, and the opening of the lower connecting hole is upward; the connecting pipe is screwed in the upper connecting hole in a sealing manner in a threaded manner;

the oil pointer main body comprises an oil pointer pipe and a fixed pipe, wherein at least part of the oil pointer pipe is accommodated in an inner hole of the fixed pipe, the fixed pipe is used for hermetically connecting the oil pointer pipe on a lower connecting hole in a threaded mode and enabling the oil pointer pipe to extend in the vertical direction, a vent hole is formed in the top of the oil pointer pipe, and the inner cavity of the oil pointer pipe is communicated with the atmosphere through the vent hole;

the oil level gauge pipe is a transparent pipe made of transparent materials; a window is arranged on one side of the fixed pipe, and a scale is arranged on one side of the window or the oil pointer pipe; the end face of the extending end of the box body of the metal corrugated hose is not higher than the lowest scale mark of the scale downwards.

This application is when using, stretch into the end with corrugated metal tubing's box and stretch into the bearing box of centrifugal pump in, and will through the second link of connecting pipe the utility model discloses be connected to on the box of bearing box, when the liquid level of the lubricating oil in the bearing box surpassed the connecting pipe, lubricating oil is to in runner and the oil pointer pipe, after working a period, when the liquid level of the lubricating oil in the bearing box is less than the connecting pipe, because the siphon effect, lubricating oil in the bearing box still can enter into in the oil pointer pipe through the connecting pipe, show the liquid level in the bearing box, can be according to specific needs, set up the height range of the window of fixed pipe, because corrugated metal tubing's box stretches into the terminal surface of end and is not higher than the minimum scale mark of scale downwards, consequently can show the minimum liquid level that hopes of seeing.

Because this application adopts the screw thread mode to install the oil pointer pipe on the oil pointer seat, can dismantle and wash the oil pointer pipe under suitable opportunity to keep the cleanness of oil pointer pipe, or directly change the oil pointer pipe.

Generally, this application adopts siphon effect and U type pipe principle, can really reflect the height state of lubricating oil liquid level in the bearing box, and the leakproofness is good, and is visual strong, observes conveniently, is convenient for install and remove, changes the oil pointer pipe, conveniently clears up inside grease, and matter is light durable.

Further, a first lock nut is screwed on the connection pipe, and the first lock nut is pressed against the upright part. When the bearing box works, certain vibration can be generated, the connecting pipe can be loosened under the vibration, and after the first locking nut is arranged, the connecting pipe can be prevented from being loosened due to the vibration.

Further, in order to improve the sealing performance between the abutting pipe and the corrugated metal hose, a sealing gasket is arranged between the abutting pipe and a flange of the corrugated metal hose.

Specifically, the diameter of the hole of this fixed pipe is greater than the external diameter of oil pointer pipe, makes and has a clearance between fixed pipe and the oil pointer pipe, and the top of this oil pointer pipe upwards surpasss fixed pipe, and a gland revolves soon the top at fixed pipe, and the gland supports and presses on the oil pointer pipe, and this air vent setting is on the lateral wall at the top of oil pointer pipe, and the inner chamber of oil pointer pipe communicates the atmosphere through the clearance between air vent and fixed pipe and the oil pointer pipe. The structure can simplify the result of the device, and simultaneously, because the clearance between the fixed pipe and the oil pointer pipe is communicated with the atmosphere through the window on the fixed pipe, the probability that external dust enters the oil pointer pipe can be reduced, and the cleanliness of the oil pointer pipe is ensured.

Furthermore, a second locking nut is screwed on the fixed tube and is pressed against the base. When the bearing box works, certain vibration can be generated, the connecting pipe can be loosened under the vibration, and after the first locking nut is arranged, the connecting pipe can be prevented from being loosened due to the vibration.

Further, in order to observe the liquid level of the lubricating oil conveniently, the central axis of the upper connecting hole extends along the horizontal direction, and a mark is arranged on one side of the upright part, which is far away from the upper connecting hole, and is as high as the central axis. Preferably, the mark is a notch, which extends in a horizontal direction. To facilitate viewing, the indicia may be painted a relatively striking color.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a schematic structural diagram of the oil pointer base.

Fig. 4 is a schematic structural diagram of the oil pointer communicating vessel.

Fig. 5 is an exploded view of the oil pointer body.

Detailed Description

Referring to fig. 1 to 4, an oil level indicator for lubricating oil of a centrifugal pump includes an oil level communicator, an oil level base 6 and an oil level main body, the oil level communicator includes a connecting pipe 2, a corrugated metal hose 1 and a pressing pipe 4, two ends of the connecting pipe 2 are respectively formed as a first connecting end 21 and a second connecting end 22, a necking portion 26 is formed on an inner wall of the connecting pipe, and an end surface of the necking portion 26 facing the first connecting end is formed as a pressing surface 25. A fixing nut 5 is provided on the outer circumferential surface of the connection pipe, and the fixing nut 5 is integrally formed on the connection pipe. A first connection external thread 23 is provided on the outer wall of the first connection end 21, a second connection external thread 24 is provided on the outer wall of the second connection end 22, and a locking internal thread 27 is provided on the inner wall of the first connection end.

The two ends of the metal corrugated hose 1 are respectively formed into a tank body extending end 41 and an oil level connection end 42, the end of the oil level connection end 42 is provided with a flange 43 extending outwards along the radial direction, and the flange 43 of the oil level connection end 42 is positioned in the connection pipe and positioned on one side of the necking part 26 facing the first connection end 22; the case body extending end 41 extends from the second connecting end 21 to the connecting pipe and then extends downward. The pressing pipe 4 is provided with a locking external thread, the pressing pipe 4 is screwed into the inner cavity of the connecting pipe through the first connecting end 22, the pressing of the oil pointer connecting end is pressed on the pressing surface, and the pressing pipe is pressed on the flange of the oil pointer connecting end in a sealing mode. In this embodiment, a sealing gasket 17 is provided between the pressing pipe and the flange of the corrugated metal hose to ensure sealing.

The oil pointer base 6 comprises a base body 60 and a flow channel 14 arranged in the base body 60, wherein the base body 60 comprises a base 61 and an upright part 62 formed by extending one end of the base 61 upwards, so that the base is L-shaped as a whole. The flow channel 14 is L-shaped, and specifically includes a vertical flow channel 31 disposed in the upright portion and a horizontal flow channel 32 disposed in the base, the vertical flow channel 31 is communicated with the horizontal flow channel 32, and the vertical flow channel extends upward to the upper end of the upright portion, that is, one end of the flow channel is located at the upper portion of the upright portion. And an upper connecting hole 63 is formed at the upper end of the upright part, the upper connecting hole 63 is formed at the side of the upright part 62 away from the base 61, and the upper connecting hole is a threaded hole and is communicated with the vertical flow path 31.

The base 61 is provided with a lower connecting hole 64 communicated with the horizontal flow path 32, the opening of the lower connecting hole 64 is upward, and the lower connecting hole is a threaded hole, namely, the other end of the flow path is positioned in the base. The connection pipe 2 is screwed into the upper connection hole 63 through the first connection external thread 23, and a rubber packing 15 is provided between the upper connection hole 63 and the connection pipe 2. In order to avoid the connection between the connection pipe 2 and the upper connection hole 63 from being loosened due to vibration, a first lock nut 38 is further screwed on the first connection external thread 23, and the first lock nut 38 is pressed against the upright part 62, and in fig. 1, for the sake of clarity, the first lock nut 38 is not pressed against the upright part.

The box body stretching end of the metal corrugated hose 1 is used for stretching into the bearing box, the second connecting end 22 of the connecting pipe 2 is used for screwing on the box body of the bearing box, and in order to avoid looseness of connection between the connecting pipe 2 and the bearing box caused by vibration, an external locking nut 39 is screwed on the second connecting external thread 24, and when the embodiment is installed on the bearing box, the external locking nut 39 is pressed on the box body of the bearing box.

Referring to fig. 5, the oil pointer main body includes an oil pointer tube 7 and a fixing tube 8, the oil pointer tube 7 is accommodated in an inner hole of the fixing tube 8, the fixing tube 8 connects the oil pointer tube 7 to the lower connection hole 64 in a sealing manner, and the oil pointer tube 7 extends in a vertical direction, a vent hole 11 is formed in the top of the oil pointer tube 7, and an inner cavity of the oil pointer tube 7 is communicated with the atmosphere through the vent hole 11. In order to ensure the sealing performance, a first sealing rubber ring 71 is arranged between the oil pointer pipe 7 and the lower connecting hole 64. In order to avoid the loose connection caused by vibration, a second locking nut 13 is screwed on the lower end of the fixed pipe 8 and is pressed against the base 61.

This oil pointer pipe is the colorless transparent pipe that organic glass made, has all seted up window 81 in the both sides of this fixed pipe, and two windows are located one side of orientation upright part 62 and the one side that deviates from upright part 62 respectively to be provided with scale 3 on the oil pointer pipe, this scale 3 is formed by the nick of carving on the oil pointer pipe. The end face of the box body stretching end of the metal corrugated hose is equal to the lowest scale mark of the scale, and it can be understood that in other embodiments, the end face of the box body stretching end of the metal corrugated hose can also exceed the lowest scale mark of the scale downwards. It is understood that in other embodiments, only one window may be provided. In addition, the oil pointer tube can also adopt a colorless transparent glass tube.

It will be appreciated that in another embodiment, the scale may also be provided separately on one side of the window, with graduation marks being provided on the scale.

Specifically, in this embodiment, the diameter of the inner hole of the fixed tube 8 is greater than the outer diameter of the oil pointer tube 7, so that a gap is formed between the fixed tube 8 and the oil pointer tube 7, the top of the oil pointer tube 7 extends upward beyond the fixed tube 8, a gland is screwed 9 on the top of the fixed tube, the gland 9 abuts against the oil pointer tube 7, and a second sealing rubber ring 10 is disposed between the gland 9 and the oil pointer tube 7 to prevent the pressure on the oil pointer tube from being too large. The vent hole 11 is arranged on the side wall of the top of the oil pointer tube 7, and the inner cavity of the oil pointer tube 7 is communicated with the atmosphere through the vent hole 11 and a gap between the fixed tube and the oil pointer tube.

In this embodiment, the central axis of the upper connection hole 63 extends in the horizontal direction, and a mark 19 is provided on the side of the upright portion 62 away from the upper connection hole 63, the mark 19 being equal in height to the central axis, and the mark being a notch extending in the horizontal direction.

In this embodiment, in order to ensure the accuracy of the flow channel 4 in the oil pointer base 6, a traditional machining method is adopted, and although 3D printing and casting are available at present, the oil pointer base 6 can also be processed, the cost of 3D printing is high, the accuracy of the flow channel 4 processed by a casting process is low, and secondary treatment is not convenient.

When the flow channel 4 is machined, a first hole channel is firstly formed in the upright part 62 from the side away from the base 62, the outer end of the first hole channel is expanded into a first step hole, then tapping is carried out in the large hole of the first step hole to form an upper connecting hole 63, and then a second hole channel is formed in the upright part 62 from bottom to top, so that the second hole channel is communicated with the first hole channel upwards and does not penetrate through the upright part upwards. Along the horizontal direction, a third hole channel is formed in the base 61 from the side far away from the upright part to the direction of the upright part, the third hole channel is communicated with the second hole channel, a fourth hole channel is formed in the base 61 from top to bottom, the fourth hole channel is communicated with the third hole channel, the upper end of the fourth hole channel is expanded into a second step hole, and then tapping is performed in the large hole of the second step hole to form a lower connecting hole 64.

Tapping at the lower end of the second hole channel to form a first pipe thread, tapping at the end, far away from the upright part, of the third hole channel to form a second pipe thread, then coating the sealant on the first plug 33, screwing the first plug on the first pipe thread, coating the sealant on the second plug 34, and screwing the second plug on the second pipe thread, so as to form the flow channel 4.

In order to ensure the appearance and improve the corrosion resistance, the openings of the second pore passage and the third pore passage, including the first plug and the second plug, can be subjected to secondary cutting to improve the smoothness, and then subjected to bead spraying and nickel plating process treatment.

Claims

1. The oil level indicating oil pointer for the lubricating oil of the centrifugal pump is characterized by comprising an oil pointer communicating device, an oil pointer seat and an oil pointer main body, wherein the oil pointer communicating device comprises a connecting pipe, a metal corrugated hose and a pressing pipe, two ends of the connecting pipe are respectively formed into a first connecting end and a second connecting end, a necking part is formed on the inner wall of the connecting pipe, and the end face, facing the first connecting end, of the necking part is formed into a pressing surface;

2. The oil level indicating fuel level of claim 1, wherein a first lock nut is screwed onto the connecting tube, the first lock nut being pressed against the upstanding portion.

3. The oil level indicating fuel level of claim 1, wherein a sealing gasket is disposed between the pressure pipe and the flange of the metal bellows.

4. The oil level indicator according to claim 1, wherein the inner bore of the fixed tube has a diameter larger than the outer diameter of the oil indicator tube, so that a gap is formed between the fixed tube and the oil indicator tube, the top of the oil indicator tube extends upward beyond the fixed tube, a pressing cover is screwed on the top of the fixed tube and presses against the oil indicator tube, the vent hole is formed in the side wall of the top of the oil indicator tube, and the inner cavity of the oil indicator tube is communicated with the atmosphere through the vent hole and the gap between the fixed tube and the oil indicator tube.

5. The oil level indicator according to claim 1, wherein a second lock nut is screwed on the fixed pipe, the second lock nut being pressed against the base.

6. The oil level indicator according to claim 1, wherein the central axis of the upper connecting hole extends in a horizontal direction, and a mark is provided on a side of the upright portion facing away from the upper connecting hole, the mark being flush with the central axis.

7. The fuel level indicating fuel level of claim 6, wherein the indicia is a notch extending in a horizontal direction.