JPH0278454A - Centrifugal electrostatic oil cleaner - Google Patents

Abstract

PURPOSE:To allow easy sinking of inclusions down to a drain system and to improve cleaning efficiency by surely guiding the oil which is to be cleaned and is ejected from an ejection port to the upper part of the drain system in the bottom of an oil tank by bevel electrode plate near the lowermost stage which is not provided with holes. CONSTITUTION:Oil feed and drain systems 21, 33 which run the oil to be cleaned upward from the ejection port 27 near the bottom of the rotary oil tank 5 are constituted of a shaft 19 which is provided in the rotary oil tank 5, the plural bevel electrode plates 23 which are laminated and installed at prescribed intervals to the shaft 19 and are bored with the holes 23a, the electrode 31 which is provided on the inner wall surface of the rotary oil tank 5 and is different in pole from the plates 23, and the ejection port 27 which is provided on the lower side of the conical electrode plate 25 of the lowermost stage and ejects the oil to be cleaned. The drain system 35 which stagnate and discharge the inclusions is provided to the lower side of the oil feed and discharge systems 21, 33. The plate 25 near the lowermost stage is not provided with holes. As a result, the inclusions are easily sunk down into the drain system and the higher cleaning efficiency than heretofore is obtd.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a centrifugal electrostatic oil purifier, and specifically relates to the internal structure of the oil purifier for increasing purification efficiency.

Conventional technology> Conventionally, in centrifugal electrostatic oil purifiers,
As described in Publication No. 60, water and particles with large mass are centrifugally sedimented by rotation of the oil tank, and particles with small mass are electrostatically separated, so that contaminant particles in contaminated oil can be separated. Contaminant particles, etc. separated in the rotating purifying oil tank generally sink downward due to the difference in specific gravity and are collected in the drain system located below the purifying oil tank. be.

<Problems to be Solved by the Invention> However, in the conventional centrifugal electrostatic oil purifier described above, the shapes of all the electrode plates stacked and installed at the rotation center of the rotating oil purifier are all approximately the same. .

For this reason, when the oil to be purified is ejected from the spout ports provided below all the electrode plates at the lowest stage, some of the contaminant particles in the oil are near the peripheral wall of the rotary oil tank where centrifugal force increases. Some contaminant particles may not reach the oil flow and rise through the holes provided in all electrode plates with the upward flow of oil, and these contaminant particles are discharged from the oil purifier before being centrifuged and settling in the drain system. There were some issues, such as:

Means for Solving the Problems> The present invention for solving the above problems consists of a shaft 19 provided in the rotary oil tank 5, a shaft 19 stacked at predetermined intervals, and holes 23a drilled therein. a plurality of all electrode plates 23,
The full electrode plate 23 provided on the inner wall surface of the rotary oil tank 5
The oil to be purified is discharged upward from the spout 27 near the bottom of the rotary oil tank 5 by the electrode 31 that has a strange shape and the spout 27 that spouts out the oil to be purified, which is provided below the lowermost electrode plate 25. I\In a structure in which an oil supply and drainage system 21.33 for fluidization is configured, and a drain system 35 for retaining and discharging contaminants is provided below the oil supply and drainage system 21.33, all electrode plates near the lowest stage 25 is non-porous, and as a second means, a guide is provided between the lowermost umbrella electrode plate 37 and the spout 27 to regulate the upward flow of the oil to be purified that has spouted out. A member 39 is provided, the lowermost umbrella electrode plate 37 below the area where the periphery of the guide member 39 faces is made non-porous, and the lowermost umbrella electrode plate 37 above the area where the periphery of the guide member 39 faces. It is characterized in that a hole 37a is bored in the hole 37a.

Effect> Oil to be purified sent from the oil supply system 21 is sent into the oil tank 5 from the spout 27. The oil in the oil tank 5 is moved in the centrifugal direction l\ by the rotation of the oil tank 5, and is guided downward by all the electrode plates 25 at the lowest stage.

Here, since the lowermost umbrella electrode plate 25 is non-porous, the oil reliably moves to the peripheral portion of all the electrode plates 25 where the centrifugal force is greatest, and contaminants with large mass are centrifugally separated.

The oil flowing upward passes through the holes 23a of all the electrode plates 23 and is further discharged from the oil drainage system 33 located above. The microparticles in the oil are charged by all the electrode plates 23 and 25, and are adsorbed and separated by the electrodes 31 provided on the inner wall of the oil tank 5.

Further, in the invention as set forth in claim 2, the oil to be purified that has flowed in from the spout 27 is moved in the centrifugal direction by the guide member 39, and is centrifugally separated when it hits the lowermost umbrella electrode plate 37. Then, the separated contaminants move downward along the lowermost umbrella electrode plate 37, and the oil purified by separation moves upward and flows upward from the hole 37a.
Flow.

In either case, the contaminants that could not be centrifuged by all the electrode plates 35 and 37 at the lowest stage are centrifuged as they flow upward in the oil tank 5 and settle into the drain system 35.

<Embodiment> An apparatus according to an embodiment of the present invention will be described in detail below based on the drawings. FIG. 2 is an overall diagram showing a purification circuit system for purifying contaminated oil. The centrifugal electrostatic oil purifier 1 mainly consists of an oil tank 5 rotatably supported within a movable case 3 and a motor 9. A pulley 7 is formed below the oil tank 5, and the drive force of a motor 9 is transmitted to the oil tank 5 by a belt 8, causing it to rotate.

A drain tank 11 is provided below the oil tank 5, and the contaminants separated in the rotating oil tank 5 are collected and discharged from a drain cock 13. Reference numerals 15 and 17 denote electrodes of different polarities, which are connected to a total electrode plate 23 and a dust collecting electrode plate 31, which will be described later.

FIG. 1 is a sectional view of the oil tank 5. A shaft 19 is erected at the center of rotation of the oil tank 5. An oil supply system 21 is formed inside the tubular shaft 19, and a spout 27 is provided at the lower end of the shaft 19 to spout oil to be purified.

Further, a plurality of all electrode plates 23 are stacked on the shaft 19 at predetermined intervals, and as shown in FIG. It passes through the chain hole 23a and flows upward. The oil flowing upward is purified within the oil tank 5 and discharged from an oil drainage system 33 at the top of the oil tank.

In the device of this embodiment, the plurality of umbrella electrode plates 2 described above are used.
As shown in FIGS. 1 and 5, the lowermost water electrode plate 25 of No. 3 has a larger diameter than the other umbrella electrode plates 23, and has no hole through which oil flows.

Dust collecting electrode plates 31 are attached to the inner wall 29 of the cylindrical oil tank 5 at predetermined intervals in the axial direction. Further, below the oil tank 5 is a drain tank 11 in which separated contaminants sink and are collected.
A drain system 35 is provided.

Hereinafter, the one-layer use based on the structure unique to this embodiment will be explained based on FIG. The oil to be purified spouted from the oil supply system 21 through the spout 27 is guided by the lowermost water electrode plate 25 while being rotated by the rotation of the oil tank 5, reaches the lowest part of the oil tank 5, and reaches just above the drain system 35. Moving. Since the lowermost water electrode plate 25 is non-porous and has a large diameter, contaminant particles contained in the oil are reliably guided directly above the drain system 35, as shown by the arrow in FIG. .

The oil that has left the peripheral edge of the lowermost umbrella electrode plate 25 flows upward, but the contaminant particles fly out in the direction of the resultant force of centrifugal force and streamline force.
It flows down along the wall of the drain system 35. Here, since the contaminant particles are guided to the lowest part by the lowermost water electrode plate 25, the proportion of them flowing upward together with the oil and being discharged from the oil drainage system 33 is reduced. In addition, the lowest water electrode plate 25
has a larger diameter than the other umbrella electrode plates 23, so all the oil to be purified can be reliably sent to the vicinity of the peripheral edge of the oil tank 5 where the centrifugal force is maximum, and the greater centrifugal force increases the purification efficiency. can be increased.

Contaminant particles that have been swept upward together with the oil are also separated by the centrifugal force and settle into the drain system 35 together with the water separated by the centrifugal force.

Furthermore, contaminant particles near the rotation center where the centrifugal force is relatively small are also charged by the umbrella electrode plate 23, and the oil tank 5 where the centrifugal force is large is charged.
Because it is attracted to the dust collecting electrode plate 31 on the inner peripheral wall,
Centrifugation becomes possible. The contaminant particles thus separated from the oil and settled are stored in the drain tank 11 of the drain system 35.

Fine particles that cannot be separated by centrifugal force are charged by the umbrella electrode plates 25 and 23, as in the conventional case, and are attracted to the dust collection electrode plate 31 and separated.

FIG. 6 is a partially enlarged sectional view of a centrifugal electrostatic oil purifier showing another embodiment. In the structure of this embodiment, a disc-shaped guide member 39 as shown in FIG. 8 is attached between the jet port 27 and the lowermost water electrode plate 37. The guide member 3
9, the oil to be purified spouted from the spout 27 is restricted from flowing upward by the guide member 39, and then flows in the horizontal direction I\. As shown in FIGS. 6 and 7, a hole 37a is formed in the lowermost water electrode plate 37 above a portion facing the periphery of the guide member 39. As shown in FIGS. With this configuration, the guide member 3
The oil to be purified horizontally guided by hole 3
7a corresponds to the lower part of the lowermost water electrode plate 37 where no holes are formed. Here, heavy contaminant particles and water are guided outward along the lower surface of the lowermost water electrode plate 37 by centrifugal force, and the separated oil rises along the lower surface of the lowermost water electrode plate 37 and pores. It flows upward from 37a. In addition, contaminant particles and the like guided to the outside move to just above the drain system 35 and are further separated by centrifugal force, as in the first embodiment.

As shown in FIG. 2, the centrifugal electrostatic oil purifier 1 configured as described above has an oil supply system 21 and an oil drainage system 33 connected to a contaminated oil tank 41, a pump 43 provided in the oil supply system 21, pump 43
An inspection device 47 is connected in parallel to the oil drain system 33 that sends oil to be purified to the centrifugal electrostatic oil purifier 1.
By opening and closing the cock 45, purified oil flows into the inspection device 47, and the degree of purification is ascertained by the inspection device 47.

9(A)(B) and FIG. 10(A)(B) show the internal structure of the inspection device 47. FIG. An oil pipe 49 is provided in the inspection device 47, and an inspection section 51 is installed in the oil pipe 49.
is installed. A transparent plate 57 made of a light-emitting material is attached to the inspection section 51, and is configured to allow light to pass therethrough. A light source 53 is attached to one side of the inspection section 51, and an optical sensor 55 is arranged on the other side. The optical sensor 55 detects the light source 5 that has passed through the inspection section 51.
The oil contamination is measured and tested by measuring the light intensity from 3.

As shown in FIGS. 9(A) and 10(A), the inspection section 51 is configured such that opposing surfaces through which light passes are flat and parallel. As a result, the entire misused portion of the optical sensor 55 is illuminated with light approximately evenly, improving the stability of the measurement results.

FIG. 9 shows an inspection section 51 in the shape of a cubic book, and FIG. 10 shows an inspection section 51 formed by crushing the oil pipe 49 so that the opposing surfaces are parallel.

11 and 12 are an overall perspective view and a partial perspective view showing how the hook 61 attached to the side surface of the centrifugal electrostatic oil purifier 1 is used.

As shown in FIG. 13, the hook 61 is attached to the centrifugal electrostatic oil purifier 1.
It is attached to the side of the case 3 with a locking bolt 65. The locking bolt 65 shown in FIG. 15 has a threaded portion 65c formed at one end, an engaging hexagonal portion 65a at the head portion at the other end, and a bolt step portion 65b formed at the end thereof. . The hook 61 shown in FIG. 14 includes a flat mounting portion 6To and a hook portion 61a curved into a semicircular arc, and the mounting portion 61b has a locking hole 69 through which the locking bolt 65 is inserted. is drilled. The locking hole 69 is an adjustment movable part 7 that is circularly bored on the side of the hook part 61a.
3, and a hexagonal locking portion 71 is provided on the opposite side of the hook portion 61a. Further, a stepped portion 6 is provided at the periphery of the locking hole 69.
9a is formed.

As shown in FIG. 13, the stop bolt 65 is inserted through the hook 61 and the side surface of the case 3 from the outside, and is screwed into the fixing nut 67 inside the case 3, thereby tightening the hook 61. Further, a washer 68 is inserted between the hook 61 and the side surface of the case 3. Here, as shown in FIG. 1311 and FIG.
5a engages with the locking portion 71 of the hook 61, so that the hook 61 is fixed unrotatably. In addition, when changing the direction of the hook 61, as shown in No. 17121, the hook 61 is slid and the locking bolt 65 is moved to the circular adjusting movable part 73.
the hook 61 in any direction, and the engaging hexagonal part 65a and the first hanging part 71 are engaged again. Also, a stepped portion 69a provided in the locking hole 69 and the locking bolt 65
, 65b are joined to each other, and the hook 61 is on the outside l\\
The nuki is designed not to fall.

By providing the structure for housing the hook 61 of the centrifugal electrostatic oil purifier 1 as described above, the uses of the hook 61 are expanded, and the first
As shown in Figures 1 and 12, it can be used as a hanging hook for pulling the hanging wire 62 during transportation, and as a hose hook for refueling and draining oil in an oil purification workshop. .

<Effects of the Invention> In the apparatus of the present invention configured as described above, according to the invention set forth in claim 1, the umbrella electrode plate near the bottom stage, which is not provided with holes, allows the air to flow out from the jet nozzle. Since the oil to be purified is reliably guided to the upper part of the drain system at the bottom of the oil tank, contaminants are more likely to sink into the drain system1, resulting in improved purification efficiency compared to the conventional method.

Furthermore, according to the invention recited in claim 2, in addition to promoting the separation of contaminants as described above in the lowermost non-porous electrode plate portion, the oil that has been purified by centrifugation and is directed upward on the slope is directed upward. It also has the effect of further increasing oil purification efficiency by sending it out.

[Brief explanation of the drawing]

Fig. 1 is an overall cross-sectional view of the first embodiment of the present invention, Fig. 2 is an overall view showing a purification circuit system for purifying contaminated oil, and Fig. 3 is an overall view showing a purifying circuit system for purifying contaminated oil.Fig. A partial enlarged sectional view of the centrifugal electrostatic oil purifier showing the movement of objects, Fig. 4 is a plan view of the umbrella electrode plate, Fig. 5 is a plan view of the lowermost umbrella electrode plate, and Fig. 6 is a diagram of the second embodiment. FIG. 7 is a plan view of the lowermost umbrella electrode plate in the second embodiment; FIG. 8 is a plan view of the guide member; FIG. 9 <A) (
B) and Figures 10 (A) and (B) are a plan view and side view showing the structure of the inspection device, Figure 11 is an overall perspective view of a centrifugal electrostatic oil purifier with a hook attached, and Figure 12 is a diagram showing the structure of the hook. Fig. 13 is a partially enlarged view showing the hook installed, Fig. 14 is an overall front view of the hook, Fig. 15 is an overall side view of the locking bolt, and Fig. 16 is a partial perspective view of the hook. FIG. 17 is a front view of the hook showing the hook adjustment rotation state. 1: Centrifugal electrostatic oil purifier 5: Oil tank 19: Shaft 21: Oil supply system 23: Umbrella electrode plate 23a: Hole

Claims (1)

[Claims] 1) A shaft (19) provided in the rotary oil tank (5), and a plurality of umbrella electrode plates stacked on the shaft (19) at predetermined intervals and having holes (23a) formed therein. (23) and the rotary oil tank (5)
An electrode (31) having a different polarity from the umbrella electrode plate (23) provided on the inner wall surface, and a spout (27) for spouting oil to be purified provided below the umbrella electrode plate (25) at the lowest stage. ), the oil supply and drainage system (21), (3
3), and a drain system (35) for retaining and discharging contaminants is provided below the oil supply and drainage systems (21) and (33), and the umbrella electrode plate (25) near the bottom stage A non-porous centrifugal electrostatic oil purifier. 2) A guide member (39) is provided between the lowermost umbrella electrode plate (37) and the spout (27) for regulating the upward flow of the oil to be purified that has spouted out, and the periphery of the guide member (39) The lowermost umbrella electrode plate (37) below the area facing the guide member (39) is made non-porous, and the lowermost umbrella electrode plate (37) above the area facing the peripheral edge of the guide member (39) has holes (37a).
A centrifugal electrostatic oil purifier according to claim 1, wherein the centrifugal electrostatic oil purifier is provided with: