CN101642646A - Filter and filtering method of oil curtain sealing system of graphite processing - Google Patents

Abstract

The present invention relates to a filter device and method for graphite processing oil curtain sealing system. The filter method adopts a coarse (first-stage) filter device and a fine (secondary) two-stage filter device, especially two-stage filter devices. Reusable filter method. Among them, the first-stage filtering device adopts a working mode in which at least two cylindrical circulation filters (2) are arranged side by side and operate at the same time. The first-stage filter device mainly includes a filter diverter pipeline device (1), at least 2 barrel-shaped circulation filters (2) and a coarse filter device control system, so as to adapt to the working flow rate of different graphite-sealed oil curtain columns. Open the corresponding number of cylindrical circulating filters to work in parallel. At the same time, it is also flexible and convenient to carry out auxiliary work such as regular maintenance, cleaning or replacement of filter elements on the filters without affecting the normal work. The barrel-shaped circulating filter (2) is composed of an oil-powder mixed liquid storage device, a circulating filter drive spindle device (2-1), a filter screen device, a residue recovery device (2-4) and a filter screen washing device. The invention can not only avoid the disadvantages of filter paper and its oil absorption cost, environmental pollution, etc., but also can meet the needs of different working flows, and is conducive to maintenance and cleaning, so as to realize the green manufacturing of graphite economically and practically.

Description

Filtration device and method for graphite processing oil curtain sealing system

technical field

The invention belongs to the field of environmental protection processing technology and graphite processing machine tools, and in particular relates to a filtering device and a method of an oil curtain sealing system for graphite processing.

Background technique

Due to the advantages of light weight, high thermal conductivity, self-lubrication at high temperature, and wear resistance, graphite has been increasingly used to make molds and electrodes in recent years. However, when graphite materials are processed, flying graphite dust will cause great pollution to the environment. Only by taking appropriate measures to control graphite dust can graphite dust be avoided from harming the human body and even causing silicosis occupational diseases. Compared with the fan suction method, the oil (water) wetting method can more effectively settle the graphite dust. The oil (water) wetting method is to form an oil curtain (film) or water curtain sealing area in the processing area to control the graphite dust flying. The continuous working oil of the curtain sealing system will entrain a large amount of graphite dust, which will be filtered by the filter device and returned to the oil tank for recycling. At present, the filtration system, especially the coarse (first-level) filtration system, mostly uses non-reusable paper tape or paper core as the filter material. During the filtration, with the accumulation of graphite dust on the paper tape, the filtering effect is weakened. New paper tapes are constantly replacing paper tapes with weakened filtering effects. Therefore, paper tape filtration is not only difficult to control the filtering effect, but also has high cost, which is not conducive to environmental protection.

Contents of the invention

The technical problem to be solved by the present invention is to provide a filter device and method for graphite processing oil curtain sealing system to solve the problems of filter material and related resource loss, maintenance and cleaning, and adapting to different working flow requirements.

The technical solution adopted by the present invention to solve the technical problem is: provide a filter device and method for graphite processing oil curtain sealing system, adopt coarse and fine two-stage filter device to filter, and two-stage filter adopts reusable filter method. The filter device mainly includes a filter split pipeline device, a coarse (first-stage) filter system and a fine (two-stage) filter system for circular barrel-shaped circulation filtration. The first-stage filtration is to filter out graphite particles and impurities with a diameter greater than 25 μm, and the second-level filtration will further filter out graphite particles and impurities with a diameter greater than 8 μm to ensure the purity of the recycled oil and its impact on the moving parts of graphite processing machine tools .

The first-stage filtering device mainly includes a filtering diversion pipeline device and a barrel-shaped circulating filter system, and adopts a structural form in which at least two barrel-shaped circulating filters are placed side by side and work in parallel. A single cylinder-shaped circulating filter is mainly composed of an oil-powder mixed liquid storage device, a circulating filter drive spindle device, a filter device, a residue recovery device and a filter washing device. The diversion pipeline device includes a main pipeline, a valve and a diversion pipeline. The main pipeline is connected to the discharge port of the stone mill, and the mixture of oil and graphite flows into the main pipeline. According to the actual working flow rate of the graphite-sealed oil curtain, it can be opened or closed. Valve, choose 1, 2 or more than 3 barrel-shaped circulation filters for filtration.

The circulating filter driving spindle device is mainly composed of a driving motor, a coupling, a transmission shaft, a bearing seat, a pair of bearings, a bushing, a bearing cover and a retaining ring, and is fixed on the support plate through a threaded connection. The motor is connected to the transmission shaft through a coupling. The transmission shaft is fixed by a pair of bearings. There is a bushing between the two bearings. There is a bearing seat on the outside and a bearing cover on the bottom. The retaining ring is located under the bracket. The power source drives the motor to rotate. , the rotation is transmitted to the transmission shaft through the coupling, and then the transmission shaft drives the filter screen and bracket at the bottom to rotate.

The oil-powder mixed liquid storage device is made of corrosion-resistant materials, and is composed of a cylindrical shell with a fan-shaped circular section and two baffles. There is a liquid inlet hole on the right side of the fan-shaped angle of the plane, and the fan-shaped angle is 270°<θ<300°. There is a U-shaped groove on the baffle, which is connected with the cylindrical shell with a fan-shaped circular section through bolts, and its up and down position can be adjusted. Then adjust the gap between the baffle plate and the filter screen so that the residue and the mixed liquid can pass through smoothly without clogging, and the cylindrical shell and the filter screen device are well sealed, and the lower end of the shell outside is extended, so that the filter screen and the bracket Cover up completely.

The filter screen device includes a filter screen and a bracket. The filter screen is made of corrosion-resistant metal with a pore size of 25 μm, and is tensioned and clamped by the bracket to form a whole. The bracket is fixedly connected to the transmission shaft through bolts, so that the transmission shaft drives the filter screen and the bracket. rotate.

The residue recovery device is made of corrosion-resistant metal filter mesh, which is used to receive and filter the remaining residue and continue to filter the remaining oil in the residue.

The filter flushing device is composed of a flushing head and a flushing fluid input pipe, installed above the residue recovery place, close to the filter area (as shown in Figure 3), to prevent the reverse flow of the liquid to be filtered, the cross section of the flushing head is rectangular, and the bottom has a series of inclined angles The flushing liquid sprays micropores (as shown in Figure 6), and the oil sprayed from it has a high speed and an inclination, which can flush the residue into the recovery device, and can punch through the blocked mesh in the filter screen, so that the oil and powder mixture can enter the storage area. The filter screen in the filter area of the device always keeps the mesh unobstructed.

When filtering, the primary filter device filters graphite particles and impurities with a diameter greater than 25 μm, and the secondary filter device filters graphite particles and impurities with a diameter greater than 8 μm, and includes the following steps:

(1) Start the motor and adjust it to an appropriate speed so that the transmission shaft drives the filter screen and the bracket to rotate;

(2) By adjusting the bolts on the U-shaped groove, adjust the upper and lower positions of the two baffles, so that there is a gap between the two and the filter screen;

(3) When the filtrate flows into the main pipeline, open 1, 2 or more than 3 valves, so that the filtrate flows into 1, 2 or more than 3 cylindrical circulation filters corresponding to the valves;

(4) The filtered liquid flows into the right area of the oil-powder mixed liquid storage device through the valve, and is filtered and separated on the filter screen;

(5) Clean flushing oil flows into the filter screen flushing device from the flushing fluid input pipe, and is sprayed out from the nozzle at the bottom for flushing.

Beneficial effect

1. Adopting the structure of multiple cylindrical circulating filters, the corresponding number of cylindrical circulating filters can be opened in parallel according to the actual working flow, and at the same time, the filters can be flexibly and conveniently maintained, cleaned or Auxiliary work such as replacing the filter element will not affect the normal work.

2. Adopting the reusable filter method can avoid the disadvantages of filter paper and its oil absorption cost, environmental pollution, etc., and realize the green manufacturing of graphite economically and practically.

3. The filter device is simple in structure and easy to operate, and can meet the needs of different filtering requirements.

Description of drawings

Fig. 1 is the filtration device of the graphite processing oil curtain sealing system of the present invention.

Fig. 2 is the filtering and splitting pipeline device of the present invention.

Fig. 3 is a perspective view of the cylindrical circulation filter of the present invention.

Fig. 4 is a sectional view of the cylindrical circulation filter of the present invention.

Fig. 5 is the filter screen of the cylindrical circulating filter and its support of the present invention.

Fig. 6 is the filter screen flushing device of the present invention.

Fig. 7 is the specific embodiment 1 of the present invention relates to the coarse (one stage) filtering device of small flow rate.

Fig. 8 is a large-flow coarse (first-stage) filter device related to Embodiment 2 of the present invention.

Among them: 1- Filtration diversion pipeline device, 2-Cylinder-shaped circulation filter, 3-Fine (secondary) filtration system, 4-Filtrate to be filtered, 5-Rinsing oil, 1-1-Main pipeline, 1-2- Valve, 1-3-Split pipeline, 2-1-Circulation filter drive spindle device, 2-2-Inlet hole, 2-3-Cylinder shell with fan-shaped cross section, 2-4-Residue recovery device, 2-5 - Bracket, 2-6- filter screen, 2-7- baffle, 2-8- flushing head, 2-9- flushing fluid input pipe, 2-1-1- drive motor, 2-1-2- coupling Device, 2-1-3-drive shaft, 2-1-4-support plate, 2-1-5-bearing seat, 2-1-6-bearing, 2-1-7-shaft sleeve, 2-1- 8-bearing cover, 2-1-9-retaining ring.

Detailed ways

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Example 1

As shown in Figure 1 and Figure 2, a graphite processing machine circulation filter device suitable for different flow rates, low consumption, and easy maintenance and cleaning uses coarse and fine (secondary) filter methods for filtration, and two-stage filtration. Reusable filter method. The filter device mainly includes a filter split pipeline device 1 , a coarse (first-stage) filter system and a fine (secondary) filter device 3 . The primary filtering device adopts a structural form in which at least two cylindrical circulation filters 2 are placed side by side and work in parallel. The first-stage filter device mainly includes a filter diverter pipeline device 1 and a drum-shaped circulation filter 2 . Cylindrical circulating filter 2 is made up of oil-powder mixed liquid storage device, circulating filter drive spindle device 2-1, filter screen device, residue recovery device 2-4 and filter screen flushing lotus device. Filtration diversion pipeline device 1 includes a main pipeline 1-1, a valve 1-2 and a diversion pipeline 1-3. The mixture of oil and graphite flows into the main pipeline 1-1. According to different flow requirements, the valve 1 can be opened or closed. -2, enable the corresponding single or multiple filter unit devices to filter. The filter screen device includes a filter screen 2-6 and a bracket 2-5. The filter screen 2-6 is tensioned and clamped by the bracket 2-5 to form a whole. The filter screen 2-6 is made of stainless steel with a pore size of 25 μm. The support 2-5 is fixedly connected with the transmission shaft 2-1-3 through bolts, so that the transmission shaft 2-1-3 drives the filter screen 2-6 and the support 2-5 to rotate. The bracket 2-5 has a tensioning and supporting effect on the filter screen 2-6, which greatly increases the load-bearing capacity of the filter screen 2-6. The oil-powder mixed liquid storage device is made of corrosion-resistant materials, and is composed of a cylindrical shell 2-3 with a sector-shaped circular section and two baffles 2-7, wherein the columnar shell 2-3 with a sector-shaped circular section and the filter screen device The room is well sealed, and the lower end of the outer shell is slightly extended to completely cover the filter screen and the bracket; the baffle plate 2-7 has a U-shaped groove, which is fixed on the two flat plates of the cylindrical shell 2-3 by bolts, There is a gap between the baffle plate 2-7 and the filter screen, so that the residue and the mixed solution pass through smoothly, so that no blockage occurs. The upper and lower positions of the baffle plate can be adjusted through the U-shaped groove, and then the gap with the filter screen can be adjusted. Residue recovery device 2-4 is made with filter screen. The filter washing device is installed above the residue recovery place, close to the filter area.

As shown in FIG. 7 , the specific filtering method and steps of this embodiment are as follows: start the motor, adjust to an appropriate speed, and make the filter screen device rotate in the direction shown in FIG. 7 . By adjusting the upper and lower positions of the U-shaped groove, the two baffles 2-7 have appropriate gaps with the filter screen 2-6, so that the left baffle 2-7 can make the residue pass through smoothly without clogging, and the right baffle can prevent Wait for the filtrate to flow back. When the filtrate 4 flows into the main pipeline, the flow rate is 40L/min, open the valve 1-2, and close all other valves at the same time, so only a cylinder-shaped circulating filter 2 corresponding to the valve 1-2 works. The filtered liquid flows into the right side area of the oil-powder mixed liquid storage device through the valve 1-2, and is filtered and separated on the filter screen 2-6, and the self-rotation of the filter screen 2-6 takes the particle residue outside the protective cover. The clean flushing oil 5 flows into the flushing device and is ejected from the nozzle at the bottom. The micropores of the nozzle are slightly biased to the outside (as shown in Figure 6). The oil ejected from it has a high velocity and is inclined, and the graphite particles larger than 25 μm are flushed into the recovery In the device, the blocked meshes in the filter screens 2-6 can be opened, so that the filter screens entering the filter area can always keep the meshes unobstructed. An oil film of a certain height is formed between the filter screen flushing device and the right baffle plate 2-7, which acts as a seal and prevents the reverse flow of the liquid to be filtered. The residue recovery device 2-4 is made of a filter screen, which can continue to filter the remaining oil in the residue, saves oil loss, reduces waste, and reduces costs. Such a circulation can complete the filtration work of the filtrate with a small flow rate.

Example 2

The overall device and composition of this embodiment are the same as those of Embodiment 1, the difference is that according to the different requirements of the flow rate, multiple filter units are selected to work at the same time by adjusting the valves of the diversion pipeline. In this embodiment, the simultaneous operation of two filter unit units is taken as an example. The filtering method and steps of the embodiment are as follows: as shown in Figure 8, start the motors of the two device units and adjust them to appropriate speeds respectively, so that the filter screen device is shown in Figure 8 Rotate in the indicated direction. By adjusting the upper and lower positions of the U-shaped groove, the two baffles 2-7 of each device unit have appropriate gaps with the filter screen 2-6 respectively, so that the left baffles 2-7 can make the residue pass through smoothly without clogging. Right baffle plate 2-7 can prevent to-be-filtered liquid 4 backflow. When the filtrate 4 flows into the main pipeline, the flow rate is 80L/min, open the two valves 1-2, and close all other valves at the same time, so only the two cylinder-shaped circulation filters 2 corresponding to the two valves 1-2 work. The filtrate 4 is shunted through the two valves 1-2, and flows into the corresponding oil-powder mixed liquid storage device on the right side, respectively, and is filtered and separated on the filter screen 2-6, and the self-rotation of the filter screen 2-6 will Particle residue is carried outside the protective enclosure. The clean flushing oil 5 respectively flows into the respective flushing devices, and is ejected from the nozzle at the bottom. The micropores of the nozzle are slightly inclined to the outside (as shown in Figure 6). Particles are washed into the recovery device, and can pass through the clogged meshes of the filter screens 2-6, so that the filter screens entering the filter area can always keep the meshes unobstructed. An oil film of a certain height is formed between the filter screen flushing device and the right baffle plate 2-7, which acts as a seal and prevents the reverse flow of the liquid to be filtered. The residue recovery device 2-4 is made of a filter screen, which can continue to filter the remaining oil in the residue, saves oil loss, reduces waste, and reduces costs. Such circulation can complete the filtration work of the liquid to be filtered with a large flow rate.

Claims (5)

1. the filter of an oil curtain sealing system of graphite processing, comprise thick (one-level) filter and essence (secondary) filter (3), it is characterized in that: described thick (one-level) filter is by filter bypass duct device (1), drum shape circulated filter system and filter control system are formed, filter bypass duct device (1) comprises trunk line (1-1), valve (1-2) and shunt conduit (1-3), trunk line (1-1) end connects the leakage fluid dram of stone mill processing machine, the other end connects shunt conduit (1-3), a valve (1-2) is housed on each shunt conduit (1-3), and is connected on the drum shape recursive filter (2) by inlet opening (2-2); Drum shape circulated filter system is made up of at least 2 drum shape recursive filters (2), and single drum shape recursive filter (2) is made up of oil-bound distemper mixed liquor storage device, circulating filtration drive shaft device (2-1), filter screen device, residue retracting device (2-4) and screen pack flusher; Described essence (secondary) filter (3) is positioned at the bottommost of whole device.

2. the filter of a kind of oil curtain sealing system of graphite processing according to claim 1, it is characterized in that: described oil-bound distemper mixed liquor storage device is made up of cylindrical shell (2-3) and two baffle plates (2-7) of fan-shaped circular section, cylindrical shell (2-3) is made of fan-shaped cylinder and two side flat boards that lay respectively at the segment angle both sides, there is inlet opening (2-2) on right side of plane segment angle on it, 270 °＜θ of segment angle＜300 °, have U type groove on two baffle plates (2-7), bolt is housed on the groove, be connected on two side flat boards of cylindrical shell (2-3), and be positioned at housing bottom.

3. the filter of a kind of oil curtain sealing system of graphite processing according to claim 1, it is characterized in that: described circulating filtration drive shaft device (2-1) is positioned at drum shape recursive filter (2) central axis, and by bolting on support plate (2-1-4), the drive motors of its top (2-1-1) links to each other with power transmission shaft (2-1-3) by shaft coupling (2-1-2), power transmission shaft (2-1-3) is fixing by pair of bearings (2-1-6), axle sleeve (2-1-7) is housed between the two bearings, and there is bearing block (2-1-5) outside, under bearing cap (2-1-8) is arranged, back-up ring (2-1-9) is positioned under the support (2-5).

4. the filter of a kind of oil curtain sealing system of graphite processing according to claim 1, it is characterized in that: described filter screen device comprises screen pack (2-6) and support (2-5), screen pack (2-6) is made by corrosion resistant metal, the aperture is 25 μ m, and become one by support (2-5) tensioning and clamping, support (2-5) is connected by bolt and power transmission shaft (2-1-3); Described residue retracting device (2-4) is made by screen pack; Described screen pack flusher is positioned at residue retracting device (2-4) top, by washing away head (2-8), washing away liquid input channel (2-9) and feedway is formed, washing away head (2-8) cross section is rectangle, and the bottom has the flushing liquor at a series of angles of inclination to spray micropore.

5. filter method that uses the filter of the described oil curtain sealing system of graphite processing of claim 1, it is characterized in that: thick (one-level) filter filters out graphite granule and the impurity of diameter greater than 25 μ m, smart (secondary) filter filters out graphite granule and the impurity of diameter greater than 8 μ m, and may further comprise the steps:

(1) actuating motor is adjusted to suitable rotating speed, makes power transmission shaft (2-1-3) drive screen pack (2-6) and support (2-5) rotation;

(2) by regulating the bolt on the U type groove, regulate the upper-lower position of two baffle plates (2-7), make both gapped with screen pack (2-6) respectively;

(3) liquid to be filtered (4) flows into trunk line (1-1), opens 1,2 or 3 above valves (1-2), makes corresponding 1,2 of liquid to be filtered (4) flow valves (1-2) or 3 above drum shape recursive filters;

(4) liquid to be filtered (4) right side area in valve (1-2) flows into oil-bound distemper mixed liquor storage device is carried out isolated by filtration on screen pack;

(5) clean flushing oil (5) flows into the screen pack flusher from washing away liquid input channel (2-9), from the shower nozzle ejection of bottom, washes away.

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