JP2018015886A - Working liquid reuse processing equipment, and working liquid reuse processing method using the equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide working liquid reuse processing equipment for sucking a liquid sludge containing chips, cut chips and the like, which have been stored in a working liquid storage tank of a machine-tool, together with a working liquid and subjecting the same to a separating treatment, and for returning the working liquid treated, to the inside of the tank, and a working liquid reuse processing method using the equipment.SOLUTION: Equipment 1 comprises: a liquid feeding pump 2 sucking and feeding a working liquid containing an in-liquid sludge from a working liquid storage tank 100; an in-liquid sludge separation passage 3 containing an in-liquid sludge capturing mold 4 for separating a liquid feeding pump pressing liquid or an in-liquid sludge; and a worked liquid drain part 5 for returning the in-liquid sludge separation treated working liquid to the working liquid storage tank.SELECTED DRAWING: Figure 1

Description

Detailed Description of the Invention

  The present invention selectively separates sludge by flowing sludge containing chips, chips and the like accumulated in a machining fluid storage tank of a machine tool through a flow path including a liquid sludge trapping mold together with the machining fluid. The present invention relates to a processing liquid reuse processing apparatus for cleaning a processing liquid and returning the processed processing liquid to a tank for reuse, and a processing liquid reuse processing method using the same.

2. Description of the Related Art Conventionally, when machining a workpiece with a machine tool, machining fluids such as oil-based cutting / grinding oil and water-based cutting / grinding oil have been used for the purpose of reducing frictional resistance between the tool and the workpiece and cooling. In particular, in the case of an automatic machine, a large amount of processing liquid stored in a processing liquid storage tank is circulated by a pump because it generates a lot of heat when processed at a high speed.
In addition, the machining fluid has a purpose of washing away so that chips and chips generated during machining do not adhere to the workpiece. Most of these washed away sludge such as chips and chips is automatically discharged out of the system by the chip conveyor and magnetic separator, but some remains in the processing liquid, and the amount of the sludge circulates in the processing liquid. As the sludge floats in the working fluid, it gradually circulates together with the working fluid, or accumulates in the working fluid storage tank as accumulated sludge. The accumulated sludge in the tank cannot be stored in excess of the tank capacity and must be removed periodically. In addition, it is said that the processing liquid needs to be periodically discarded and renewed because it deteriorates due to long-term circulation use such as spoilage due to microbial contamination. Usually, during this renewal, the accumulated sludge in the tank is removed from the tank together with the processing liquid.

However, since the machining fluid used for machining is reduced by being taken out to the workpiece to be machined, etc., it is replenished in accordance with the amount of reduction. Usually, a new working fluid is used for this replenishment. As a result, the processing liquid in the tank is regularly updated, so in many cases it is not necessary to dispose of it, and it can be reused by separating the accumulated sludge in the tank and the submerged sludge in the liquid. be able to.
In addition, as a processing fluid purification device, it has been proposed to separate sludge by stirring the cutting fluid in the tank so as not to deposit sludge and continuously feeding the stirred processing fluid to a separating means such as a cyclone. (For example, refer to Patent Document 1).

JP 2001-310236 A

However, in the above-mentioned Patent Document 1, the apparatus installed for each machine tool must always be stirred in order to prevent sludge from accumulating in the tank, and there is a problem in terms of equipment cost and running cost.
On the other hand, devices using roll filter paper, bag filters, etc. are also commercially available as simple suction filtration devices for processing fluid filtration. However, when a large amount of sludge is to be treated, the filter is frequently clogged. There was a problem that the device had to be stopped and the filter replaced every time.

  The present invention has been made in view of the above-described situation, and the sludge containing chips, chips and the like accumulated in the machining liquid storage tank of the machine tool is placed in a flow path provided with a submerged sludge trapping mold together with the machining liquid. A processing liquid reuse processing apparatus and a processing liquid reuse processing method using the processing liquid for recycling the processing liquid after flowing and selectively separating sludge and returning the processed processing liquid into the tank. The purpose is to provide.

The present invention is as follows.
1. The sludge accumulated in the machining fluid storage tank of the machine tool is caused to flow together with the machining fluid to the submerged sludge trapping flow path, the sludge in the fluid is separated from the machining fluid containing the sludge, and the treated machining fluid is treated with the machining fluid. A processing fluid reuse processing apparatus for returning to a storage tank and reusing it, wherein the processing fluid storage tank sucks the processing fluid containing the sludge from the processing fluid storage tank and sends it to the flow path, and is sent by the liquid feeding pump A submerged sludge separation channel that separates only submerged sludge from the working fluid using the difference in flow characteristics between the liquid component and the solid component, and a submerged sludge treated process that has been processed by the submerged sludge separation channel. A machining fluid recycle processing apparatus comprising a machining fluid storage tank provided with a machining fluid discharge unit for returning the fluid to the machining fluid storage tank.
2. The submerged sludge separation channel includes a separation channel for flowing a processing liquid containing submerged sludge, a submerged sludge trapping mold provided in the middle of the separation channel, and a submerged sludge separation channel. A machining fluid recycle processing apparatus having a machining fluid feed pump to be introduced and a machining fluid discharge unit for returning the machining fluid having been subjected to sludge treatment in liquid to the machining fluid storage tank.
3. The submerged sludge trapping mold is provided with a porous body for trapping submerged sludge in a very general flow path such as a duct, a pipe, and a soot. In this processing apparatus, a liquid film-like flow is formed, and at the same time, the sludge in the processing liquid is selectively captured. The thickness of the liquid film formed at this time is desirably equal to or less than the length of the submerged sludge to be captured. Ideally, the capture mold is provided with a number of fine holes having a shape and size similar to sludge in liquid and has a property of allowing the processing liquid to penetrate. Therefore, it is suitable to use a porous material or a processed fiber product regardless of the material for the capture mold, but the processing liquid forms a liquid film-like flow on the surface of the capture mold and at the same time, submerged sludge in the processing liquid. As long as it selectively captures, it is not limited to these.
The submerged sludge-treated machining liquid that has passed through the submerged sludge trapping mold naturally falls into the machining liquid storage tank from the machining liquid discharge portion provided at the end of the separation channel. An auxiliary separation channel that accumulates fine floating sludge and sedimentary sludge that pass through the submerged sludge trapping mold may be provided at the outlet of the processing liquid discharge section.
4). It is conceivable that the processing liquid reuse processing apparatus is installed in a permanent form as a part of the processing liquid storage tank. Further, by utilizing the difference between the flow characteristics of the liquid component and the solid component from the liquid feed pump that sucks the machining liquid containing the sludge from the machining liquid storage tank and sends it to the flow path, and the machining liquid sent by the liquid feed pump A processing liquid comprising a submerged sludge separation channel that separates only the submerged sludge, and a processing liquid discharge unit that returns the submerged sludge-treated processing liquid processed by the submerged sludge separation channel to the processing liquid storage tank. The reusable processing apparatus may be configured independently, and may be a portable processing liquid reuse processing apparatus that is used externally in various processing liquid storage tanks.
5). From the processing liquid storage tank that sucks the processing liquid containing the sludge from the processing liquid storage tank and sends it to the flow path, and from the processing liquid sent by the liquid supply pump, the difference in flow characteristics between the liquid component and the solid component is utilized in the liquid. The process of separating only the sludge using the submerged sludge trapping mold, and the processing liquid processed by the submerged sludge separation channel from the processing liquid discharge part of the submerged sludge separation channel from the processing liquid And a step of returning to the liquid storage tank.

  According to the permanent type or portable type processing fluid reuse processing apparatus of the present invention, in order to separate the submerged sludge from the processing fluid, a submerged sludge separation channel provided with a submerged sludge trapping mold is provided. Even when separating the relatively fine submerged sludge accumulated in the machining fluid storage tank of the machine, the separation process is performed continuously and efficiently without causing sludge clogging. can do. Also, since it can be designed as a portable type, it is transported to the vicinity of the machining fluid storage tank of the machine tool and the processing fluid reuse processing is executed. A plurality of machine tools can be used in common, such as executing a processing fluid recycling process.

  Further, the submerged sludge separation channel forms a liquid film-like flow having a thickness equal to or less than the length of the submerged sludge to be trapped in the submerged sludge trapping mold surface layer portion. In the case where the trapping mold has a large number of micropores having a shape and size similar to the sludge in liquid, the sludge in liquid can be suitably separated from the processing liquid introduced into the separation channel. As a result, even when submerged sludge that does not easily float or sink in the processing liquid is processed, the separation process can be executed continuously without stopping the apparatus. In addition, by separating and removing sludge in the liquid, the sedimentation or floating speed of sludge that tends to settle and sludge that tends to rise increases, so sludge separation that has been widely used in the past, such as chip conveyors, magnetic separators, and oil skimmers. The separation capability of the device can also be greatly improved.

  Furthermore, it is known that the submerged sludge separated in the submerged sludge separation channel promotes the decay of the processing liquid and becomes a bait of microorganisms that cause the generation of malodors. Separation and removal can extend the service life of the working fluid and reduce the odor level.

It is a figure which shows typically the stationary-type process fluid reuse processing apparatus which concerns on a present Example. It is explanatory drawing which shows typically the portable processing liquid reuse processing apparatus which concerns on a present Example. It is a figure which shows the submerged sludge separation flow path which concerns on a present Example, (A) is a top view, (B) shows a longitudinal cross-sectional view, respectively. It is a figure which shows typically the submerged sludge capture | acquisition casting mold which concerns on a present Example, (A) is a top view, (B) shows a longitudinal cross-sectional view, respectively. It is explanatory drawing for demonstrating the effect | action of the isolation | separation processing means which concerns on a present Example, (A) is a state with the large liquid film thickness of the processing liquid which flows through the submerged sludge capture | molding casting_mold | template surface layer part, (B) The state in which the liquid film thickness of the working fluid flowing through the surface portion of the sludge trapping mold in the liquid is approximately the same as the chip length is shown. It is a figure which shows the sludge trapped by the sludge trapping mold in a liquid, (A) is sludge obtained by processing a soluble type processing liquid, (B) is obtained by warping an emulsion type processing liquid. Showing sludge. It is a figure which shows the auxiliary | assistant isolation | separation flow path which attaches to a process liquid discharge part exit, and accumulate | stores the fine floating sludge and sedimentary sludge which pass a sludge trapping mold in liquid sludge.

  The stationary or portable machining fluid reuse processing apparatus according to the present embodiment sucks sludge accumulated in the machining fluid storage tank of the machine tool together with the machining fluid, and separates the sludge in the fluid from the machining fluid containing the sludge. A stationary or portable processing fluid reuse processing device for returning the processed processing fluid to the processing fluid storage tank for reuse, which is a liquid feed pump, submerged sludge separation channel described below And a submerged sludge trapping mold and a processing liquid discharge part.

The “working fluid” is not particularly limited as long as it is used at the time of machining with a machine tool, and may be, for example, a water-soluble cutting oil.
The “sludge” refers to not only chips, chips, abrasive grains, etc. generated during machining by a machine tool, but also general foreign matters mixed in the machining liquid. In addition, this sludge accumulates in the cutting fluid storage tank of the machine tool or floats in the cutting fluid, and sludge that does not settle or rise in a short time is called submerged sludge. .
Moreover, although the form which moves the portable cutting fluid reuse processing apparatus which concerns on this embodiment is not specifically limited, For example, the form moved by moving means, such as a hand-drawn trolley and a self-propelled trolley, can be mentioned.

  The “liquid feed pump” is not particularly limited in its structure, size, form, and the like as long as the machining liquid containing the sludge is sucked from the machining liquid storage tank and pumped. Examples of the type of pump used as the liquid feeding pump include a volumetric pump such as a diaphragm pump, a gear pump, and a vane pump, and a non-volumetric pump such as a vortex pump. In particular, the pump is a diaphragm pump. preferable. Due to its structure, the carrier fluid does not enter the pump mechanism other than the flow path, so there is no failure due to sludge biting, etc., and even a high-viscosity machining fluid containing a large amount of sludge is suitable. This is because the suction can be continued even if air is sucked during suction. Further, the liquid feed pump does not need to have power, and may be a siphon type scrubber device capable of sucking and feeding the machining liquid.

As a form in which the processing liquid containing the sludge is sucked in by the liquid feed pump, for example, a suction tool in which one end side of the flexible hose is connected to the suction port of the liquid feed pump and detachably connected to the other end side is used. The form etc. which insert in the said process liquid storage tank and suck in can be mentioned.
The “flexible hose” is not particularly limited in size, material, and the like.

  As long as the above-mentioned submerged sludge separation flow path flows the above-mentioned feed pump pumping processing liquid to the submerged sludge trapping mold surface layer and separates the submerged sludge, its configuration, size, number, processing form, etc. It doesn't matter. The submerged sludge separation flow path includes, for example, a general flow path main body such as a duct, a pipe, and a soot, an introduction part for introducing a liquid feed pump pressure processing liquid into the flow path main body, and a flow path main body. Provided with a submerged sludge trapping mold for capturing submerged sludge and a processing liquid discharge part for reusing the processing liquid in the flow path main body from which the submerged sludge is separated to the processing liquid storage tank. (See Figure 3, for example)

As long as the above-mentioned submerged sludge trapping mold can capture submerged sludge, its structure, shape, material, etc. are not particularly limited, but submerged sludge is trapped in a very general flow path such as a duct, a pipe or a tub. The porous body is laid over the entire width of the flow path body, and the processing liquid forms a liquid film-like flow on the surface of the porous body, and at the same time, the sludge in the liquid in the processing liquid It is desirable to be a processing device that selectively captures. The thickness of the liquid film formed at this time is preferably equal to or less than the length of the submerged sludge to be captured, and the capturing mold is provided with a large number of micropores having shapes and dimensions similar to the submerged sludge. Ideally, it should have the property of penetrating the working fluid. In order to make the thickness of the liquid film equal to or less than the length of the submerged sludge, it is desirable to install the submerged sludge separation channel with an inclination angle θ (> 0 °). The shape, material, etc. are not particularly limited (for example, see FIG. 4). As described above, it is suitable to use a porous body or a fiber processed product for the capture mold regardless of the material, but the processing liquid forms a liquid film flow on the surface of the capture mold, and at the same time in the liquid in the processing liquid. The present invention is not limited to these as long as it selectively captures sludge.
By the above-described submerged sludge trapping mold, the processing liquid containing the submerged sludge introduced into the surface portion thereof is separated into the processing liquid and the submerged sludge. In addition, the separated submerged sludge is only mechanically trapped in the hole or edge of the submerged sludge trapping mold, so it can be easily recovered by simply washing the trapper mold with water after processing. The submerged sludge trapping mold after washing can be used repeatedly as it is.

  As long as the above-mentioned `` working fluid discharge part '' is provided at the end of the submerged sludge separation flow path main body and discharges the processing liquid in the flow passage main body as a submerged sludge trapping mold passing processing liquid, its structure, shape, The material is not particularly limited. The said process liquid discharge part can mention the form which falls naturally to the process liquid storage tank provided in the terminal of the said flow path main body, and utilizing the inclination of a flow path main body, for example. In addition, an auxiliary separation channel that accumulates fine floating sludge and sedimentary sludge that pass through the submerged sludge trapping mold may be provided at the outlet of the processing liquid discharge section.

  Hereinafter, the present invention will be specifically described with reference to the drawings. In addition, the capacity of the machining fluid storage tank of the machine tool according to the present embodiment is about 400 liters which is the machining fluid storage tank capacity of a general machine tool, and the cutting fluid stored in the machining fluid storage tank. Is about 300 liters. Further, the processing liquid in the processing liquid storage tank is a processing liquid processed by a chip conveyor or a magnetic separator, and contains a lot of fine sludge.

1. Configuration of Processing Fluid Reuse Processing Device A processing fluid reuse processing device 1 according to this embodiment (hereinafter also simply referred to as this device) sucks sludge accumulated in a processing fluid storage tank 100 of a machine tool together with the processing fluid. In a stationary or portable machining fluid reuse processing device for separating the sludge 42 in the fluid from the machining fluid containing the sludge and returning the treated fluid to the machining fluid storage tank 100 for reuse. As shown in FIGS. 1 and 2, the pump includes a liquid feed pump 2, a submerged sludge separation channel 3, a submerged sludge trapping mold 4, and a processing liquid discharge part 5, and is portable. These are mounted on a carriage 10 as a moving means.

  One end side of the flexible hose 21 is connected to the suction port of the liquid feed pump 2, and the other end side of the flexible hose 21 sucks machining fluid and sludge from the machining fluid storage tank 100 of the machine tool. A suction tool 22 is detachably connected. The discharge port of the liquid feed pump 2 is connected to the introduction part of the submerged sludge separation flow path 3 by piping.

  As shown in FIG. 3, the submerged sludge separation flow path 3 includes a general flow path main body such as a duct, a pipe, and a soot, and an introduction section that introduces a liquid feed pump pressure processing liquid into the flow path main body. And a submerged sludge trapping mold 4 provided in the flow path main body for capturing the submerged sludge and a processing liquid for separating and reusing the processing liquid in the flow path main body separated from the submerged sludge into the processing liquid storage tank. The liquid discharge unit 5 is configured.

  As shown in FIGS. 4 (A) and 4 (B), the submerged sludge trapping mold 4 is a porous body for trapping submerged sludge provided in the middle of very general flow paths such as ducts, pipes, and soot. The porous body is laid over the entire width of the flow path body. The porous body is provided with a large number of fine holes 41 having a shape and size similar to the sludge in liquid. In addition, in order to increase the separation capability of the sludge in liquid by the trapping mold, it is desirable that a liquid film-like flow having a thickness approximately the same as the length of the sludge in liquid is formed on the surface of the porous body. The road is installed with an inclination angle θ (> 0 °). As a result, the processing liquid introduced into the submerged sludge separation flow path 3 by the liquid feed pump 2 passes through the capturing mold surface layer portion, so that the submerged sludge in the processing liquid is selectively captured by the capturing mold 4. .

  The end of the submerged sludge separation flow path is connected to the processing liquid discharge unit 5, and the submerged sludge trapping mold-passed processing liquid is naturally dropped into the processing liquid storage tank using the inclination of the flow path body. Yes. In addition, an auxiliary separation channel 6 having a simple partition 61 that accumulates fine floating sludge 62 and sedimentary sludge 63 that pass through the submerged sludge trapping mold can be provided at the outlet of the processing liquid discharge section. .

2. Processing fluid reuse processing.
Next, the working fluid reuse process using the working fluid reuse processing apparatus 1 according to the present embodiment will be described.

  First, as shown in FIGS. 1 and 2, the apparatus 1 is installed or transported in the vicinity of the machining fluid storage tank 100 of the machine tool in which sludge is accumulated. Then, the flexible hose 21 of the liquid feed pump 2 is extended to insert the suction tool into the machining liquid storage tank 100. In this state, the liquid feed pump 2 is driven. As a result, the machining fluid containing the submerged sludge in the machining fluid storage tank 100 of the machine tool is sucked. The sucked mixed fluid of the submerged sludge and the processing liquid is pumped to the submerged sludge separation channel 3.

  In the submerged sludge separation channel 3, the processing liquid containing the introduced submerged sludge moves to the surface layer surface of the submerged sludge trapping mold 4 by its own weight due to the inclination angle provided in the channel. The working fluid that has reached the surface of the capturing mold forms a liquid film having the same length as the sludge in the liquid and flows downstream. At this time, sludge in liquid having a shape and size close to the pores 41 in the mold is mechanically trapped and separated in the pores on the surface of the capture mold. The machining fluid that has passed through the submerged sludge trapping mold is returned to the machining fluid storage tank 100 of the machine tool from the machining fluid discharge section 5 connected to the end of the submerged sludge separation channel by natural fall. In addition, an auxiliary separation channel with a simple partition that accumulates fine floating sludge and sedimentary sludge that passes through the submerged sludge trapping mold is provided at the outlet of the machining fluid discharge part, and the separation channel is passed through. The machining liquid may be returned to the machining liquid storage tank later.

When the separation process is performed as described above, as shown in FIG. 6, the sludge in the liquid that does not settle or rise in a short time is separated and removed from the processing liquid, and the sludge that easily settles and the sludge that easily floats are removed. Therefore, the separation capability of sludge separation devices that have been widely used in the past, such as chip conveyors, magnetic separators, and oil skimmers, is greatly improved. In addition, submerged sludge is known to be a bait for microorganisms that promote the deterioration of processing liquids and cause malodor. By continuously separating and removing sludge in liquids, Service life can be extended and odor levels can be reduced. Fine floating sludge and sedimentary sludge that pass through the submerged sludge trapping mold can be accumulated in the auxiliary separation flow path by providing the auxiliary separation flow path 6 in the processing liquid discharge section 5.
3. Effects of the embodiment

  As described above, according to the processing liquid reuse processing apparatus 1 of the present embodiment, the submerged sludge separation flow path 3 and the submerged sludge trapping mold 4 are provided in order to separate the submerged sludge from the processing liquid. Even when a large amount of submerged sludge accumulated in the machining fluid storage tank 100 of the machine tool is separated, the separation process is performed continuously and efficiently without causing sludge clogging. Can be executed. Moreover, since it can also be made portable, it is transported to the vicinity of the machining fluid storage tank 100 of the machine tool to execute the processing fluid reuse process, and is transported to the vicinity of another processing fluid storage tank 100 after the processing is completed. Thus, a plurality of machine tools can be used in common, such as executing a processing fluid recycling process.

  Further, since the submerged sludge separated by the submerged sludge trapping mold 4 is merely mechanically trapped in the hole or hole edge of the submerged sludge trapping mold, the trapping mold is treated with water or the like after the treatment. It can be easily recovered simply by washing, and the submerged sludge trapping template after washing can be used repeatedly as it is.

  Further, the processing liquid reuse processing apparatus 1 of the present embodiment is an energy saving apparatus that uses the head difference except for the liquid feed pump 2, that is, a machining mechanism that allows the processing liquid to flow without power. In addition, since the submerged sludge treatment flow path 3 and the submerged sludge trapping mold 4 are the main elements, it is possible to design a space-saving type. In the case of a portable type, such as a factory where a machine tool is installed, etc. It can be freely moved on a working path having a general width.

  DESCRIPTION OF SYMBOLS 1; Processing liquid reuse processing apparatus, 2; Liquid feed pump, 21; Flexible hose, 22; Suction tool, 3; Submerged sludge separation flow path main body, 4; Submerged sludge capture mold, 41; 42; Sludge in liquid, 5; Processing liquid discharge part, 6; Auxiliary separation channel, 61; Partition, 62; Floating sludge, 63; Sedimentary sludge, 10; Dolly, 21; Flexible hose, 22; Mouth, 100; processing fluid storage tank.

Claims (4)

  The submerged sludge accumulated in the processing fluid storage tank of the machine tool is sucked together with the processing fluid, the submerged sludge is separated from the processing fluid containing the sludge, and the processed processing fluid is returned to the processing fluid storage tank. And a liquid feed pump for sucking and pumping a working liquid containing sludge in the liquid from the working liquid storage tank, A submerged sludge separation flow path that includes a submerged sludge trapping mold that separates submerged sludge from a pumped working fluid that is pumped from, and a processing fluid discharge unit that returns the submerged sludge separation processed processing fluid to the processing fluid storage tank, A stationary or portable cutting fluid reuse treatment apparatus and a machining fluid reuse treatment method, comprising:   The submerged sludge separation flow path includes a general flow path main body such as a duct, a pipe, and a soot, an introduction part for introducing a liquid feed pump pressure processing liquid into the flow path main body, and a flow path main body. A submerged sludge trapping mold for capturing submerged sludge and a processing liquid discharge unit for reusing the processing liquid in the flow path main body from which the submerged sludge is separated are returned to the processing liquid storage tank. The stationary or portable processing liquid reuse processing apparatus and the processing liquid reuse processing method according to claim 1, further comprising a flow path characterized by the above.   The submerged sludge trapping mold is provided with a porous body for trapping submerged sludge in a general flow path such as a duct, a pipe, and a soot, and the porous body covers the entire width of the flow path body. A processing apparatus that is laid and has a capture mold characterized in that the processing liquid forms a liquid film-like flow in the surface layer portion of the porous body, and simultaneously captures sludge in the liquid in the processing liquid selectively. The stationary or portable machining fluid reuse treatment apparatus and the machining fluid reuse treatment method according to 1.   In the submerged sludge trapping mold, the thickness of the liquid film formed on the surface of the trapping mold is equal to or less than the length of the submerged sludge to be trapped. In order to provide a large number of fine pores and to allow the machining liquid to permeate, and to make the thickness of the liquid film equal to or less than the length of the sludge in liquid, the sludge separation path in liquid is inclined at an angle θ (> The stationary type or portable type processing liquid reuse processing apparatus and the processing liquid reuse processing method according to claim 1, further comprising a submerged sludge separation flow path.

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