Liquid surface floating matter collection device

Abstract

To provide a liquid surface floating matter collection device which can be configured to be miniaturized, the device being capable of reliably and efficiently collecting liquid surface floating matter even when applied to a compact liquid tank which is small, narrow, and shallow.SOLUTION: A liquid surface floating matter collection device includes: a collection port part 3 which sucks liquid surface floating matter; a collection pipe 4 as a liquid sending passageway for sending the sucked liquid surface floating matter to a separation collection device; and a float part 5 which floats, via a support member, the collection port part immediately below a liquid surface. The collection pipe includes: a main pipe part 41 made of a rigid pipe which is connected on an upper end thereof to a liquid sending pipe 7 and vertically extends from above the liquid surface toward the bottom part of a liquid tank; a slide pipe part 42 which is connected on an upper end thereof to a lower part of the collection port part and extends toward the bottom part of the liquid tank and which can have a relative length variable according to alteration of the liquid surface; and a connection pipe part 43 which connects a lower end of the main pipe part and a lower end of the slide pipe part. The float part is disposed downstream, in a water flow direction near the liquid surface, of the collection port part with a gap therebetween and is provided with an air gap part which penetrates through a central part of the float part vertically from top to bottom. The main pipe part is inserted through the air gap part in a state of moving freely in an upper and lower direction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a liquid surface floating matter recovery device, and more particularly to a device that recovers floating matters such as scum and floating oil floating on the liquid surface of a small, narrow, and shallow liquid tank and sends them into a separation and recovery device.

Background Art

[0002] Conventionally, various liquid surface floating matter recovery devices for recovering scum in sewage treatment plants, food factories, etc. and floating oil in plating factories have been proposed and put into practical use. The present inventor has also previously proposed a plurality of them (see, for example, Patent Documents 1 to 3, etc.).

[0003] These liquid surface floating matter recovery devices are configured to suck and recover the liquid surface floating matter floating on the liquid surface by floating the recovery port near the liquid surface by three to about eight floats evenly arranged around the recovery port.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] Since the previously proposed technologies of Patent Documents 1 to 3 have a plurality of floats evenly arranged around the recovery port, when applied to a liquid tank where waves are likely to form on the liquid surface, they can exhibit the effect of supporting the recovery port to follow the liquid surface in a stable state.

[0006] However, in these liquid surface floating matter recovery devices, since a plurality of floats are evenly arranged around the recovery port, the diameter of the liquid surface floating matter recovery device itself has to be increased to a certain extent.

[0007] Therefore, in the case of small, narrow, and shallow small liquid tanks such as coolant tanks for machine tools and waste water tanks of alkaline degreasing washing machines, it is difficult to apply them in practice. Also, even if the overall size of the liquid surface floating matter recovery device is reduced by miniaturizing the floats and the like, when applied to these small liquid tanks, the movement of liquid surface floating matter such as scum and floating oil floating on the liquid surface to the recovery port is likely to be hindered by the plurality of floats arranged around the recovery port.

[0008] Therefore, an object of the present invention is to provide a miniaturizable liquid surface floating matter recovery device that can reliably and efficiently recover liquid surface floating matter such as scum and floating oil floating on the liquid surface even when applied to small, narrow, and shallow small liquid tanks.

Means for Solving the Problems

[0009] The above problems of the present invention are achieved by the following configuration.

[0010] 1. A recovery port for sucking and recovering liquid surface floating matter floating on the liquid surface, A recovery pipe that serves as a liquid delivery passage for sending the liquid surface floating matter sucked at the recovery port to a separation and recovery device outside the liquid tank, A float portion that floats the recovery port directly below the liquid surface via a support member, In a liquid surface floating matter recovery device configured to have, The recovery pipe has a main pipe portion made of a rigid pipe that extends vertically from above the liquid surface toward the bottom of the liquid tank with its upper end connected to a liquid delivery pipe connected to a separation and recovery device outside the liquid tank, a slide pipe portion that extends toward the bottom of the liquid tank with its upper end connected to the lower part of the recovery port and whose relative length can be made variable according to the liquid surface fluctuation, and a connection pipe portion that connects the lower end of the main pipe portion and the lower end of the slide pipe portion near the bottom of the liquid tank. The float part is arranged with a gap provided on the downstream side in the water flow direction near the liquid surface with respect to the recovery port part, and a void part penetrating vertically up and down is further provided in the central part, and the main pipe part of the recovery pipe is inserted into this void part in a floating state in the vertical direction. A liquid surface floating matter recovery device characterized by the above.

[0011] 2. The liquid surface floating matter recovery device according to 1 above, characterized in that the slide pipe part has a telescopic structure that expands and contracts in the vertical direction.

[0012] 3. The liquid surface floating matter recovery device according to 1 above, characterized in that the shape of the float part from the part exposed above the liquid surface to the part sinking directly below the liquid surface is boat-shaped when viewed in plan, and the part corresponding to the bow of this boat-shaped structure faces the direction of the recovery port part.

[0013] 4. The liquid surface floating matter recovery device according to 3 above, characterized in that the boat width of the part of the float part configured in a boat shape is smaller than the outer diameter of the recovery port part.

[0014] 5. The liquid surface floating matter recovery device according to 1 above, characterized in that the peripheral edge part of the opening of the recovery port part has a float structure.

[0015] 6. The liquid surface floating matter recovery device according to 1 above, characterized in that the lower end of the main pipe part, the connection pipe part, and the lower end of the slide pipe part are integrally formed.

[0016] 7. It has a fixing member that can be fixed to any one of the upper edge part, the upper frame part, and the outer wall part of the liquid tank, and a mounting part provided on the fixing member. The liquid surface floating matter recovery device according to any one of 1 to 6 above, characterized in that the liquid surface floating matter recovery device is arranged at a desired position in the liquid tank by mounting and fixing the upper part of the main pipe part of the recovery pipe to the mounting part.

Effect of the Invention

[0017] According to the invention shown in claim 1, even when applied to a small, narrow, and shallow small liquid tank, it is possible to provide a miniaturizable liquid surface floating matter recovery device that can reliably and efficiently recover floating matters on the liquid surface such as scum and floating oil floating on the liquid surface.

[0018] In particular, since the float part is inserted into the main pipe part of the recovery pipe in a vertically floating state, it can follow the liquid level change without lateral displacement, and the recovery port part supported by this float part can also follow the liquid level change and always be located directly below the liquid level to stably recover the floating matters on the liquid surface. Also, since the float part is arranged on the downstream side in the water flow direction near the liquid level with respect to the recovery port part, it is applicable not only to a narrow liquid tank but also to floating matters on the liquid surface that move on the liquid surface along with the water flow. They will reach the recovery port part without being obstructed by the float part and be recovered. Furthermore, since the water flow on both sides in the width direction of the liquid surface floating matter recovery device is not inhibited, the floating matters on the liquid surface can be recovered from almost the entire circumferential direction of the recovery port part.

[0019] According to the invention shown in claim 2, since the slide pipe part expands and contracts in the vertical direction as the liquid level changes, it does not inhibit the followability of the recovery port part connected to the upper end of the slide pipe part directly below the liquid level.

[0020] According to the invention shown in claim 3, by receiving the water flow toward the float part so that the part corresponding to the bow divides it left and right, the turbulence of the water flow near the liquid level generated from the downstream side position of the recovery port part can be suppressed. Therefore, the floating matters on the liquid surface that move on the liquid surface along with the water flow will smoothly reach the recovery port part and be recovered.

[0021] According to the invention shown in claim 4, since the water flow toward the float part can be received more smoothly, the turbulence of the water flow generated from the downstream side of the recovery port part can be significantly suppressed.

[0022] According to the invention described in claim 5, even without providing a float separately around the recovery port, the recovery port can be suspended directly below the liquid surface in a more stable state.

[0023] According to the invention described in claim 6, the component configuration can be simplified, and by eliminating the connection part, the occurrence of liquid leakage can be prevented.

[0024] According to the invention described in claim 7, the liquid surface floating matter recovery device can be easily disposed at a desired position in the liquid tank.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0026] Next, the present invention will be described in detail based on embodiments with reference to the accompanying drawings.

[0027] The liquid surface floating matter recovery device according to the present invention (hereinafter, sometimes simply referred to as "recovery device" or "device") is a device that recovers scum, floating oil, and other liquid surface floating matters floating on the liquid surface of a small, narrow, and shallow small liquid tank such as a coolant tank for a machine tool or a waste water tank of an alkaline degreasing washer, and sends them to a separation and recovery device.

[0028] The liquid surface floating matter recovery device 1 of the present invention, as shown in FIGS. 1 to 4, A recovery port 3 for sucking and collecting the liquid surface floating matter S floating on the liquid surface of the liquid C in the liquid tank 2, A recovery pipe 4 that serves as a liquid delivery passage for sending the liquid surface floating matter S sucked by the recovery port 3 to a separation and recovery device (not shown) outside the liquid tank 2, A float portion 5 that floats the recovery port 3 directly below the liquid surface via a support member 6, In a configuration having The recovery pipe 4 has a main pipe portion 41 made of a rigid pipe that extends vertically from above the liquid surface toward the bottom of the liquid tank 2 with its upper end connected to a liquid delivery pipe 7 connected to a separation and recovery device outside the liquid tank 2, a slide pipe portion 42 with its upper end connected to the lower part of the recovery port 3 and extending toward the bottom of the liquid tank 2, and the length thereof can be variably adjusted according to the liquid surface fluctuation, and a connection pipe portion 43 that connects the lower end of the main pipe portion 41 and the lower end of the slide pipe portion 42 near the bottom of the liquid tank 2. The float portion 5 is provided with a gap only at one location on the downstream side in the water flow direction near the liquid surface with respect to the recovery port 3, and a void portion 51 that vertically penetrates in the vertical direction is provided in the central portion. The main pipe portion 41 of the recovery pipe 4 is inserted into the void portion 51 in a floating state in the vertical direction. Is the main configuration. A pump is connected to the liquid delivery pipe 7 together with the separation and recovery device, and the pump may be configured as a separate unit or an integrated unit with the separation and recovery device.

[0029] The recovery port 3 is supported by the float portion 5 via the support member 6 so as to float directly below the liquid surface. Further, it is preferable that the recovery port 3 itself has buoyancy by forming the peripheral edge portion 32 of the opening 31 into a float configuration. Examples of the float configuration of the recovery port 3 include a configuration having an air portion inside the peripheral edge portion 32, and a configuration in which the peripheral edge portion 32 itself is formed of a foamed resin having an independent bubble structure. Further, it is preferable that the buoyancy can be adjusted by including or attaching a weight W so that the opening 31 of the recovery port 3 can be positioned directly below the liquid surface.

[0030] Further, it is preferable that the recovery port 3 is supported by the support member 6 so as to be tiltable and swingable. One end of the support member 6 is fixedly attached to the float portion 5 by the fixed support portion 61, and the other end supports the recovery port 3 in a vertically movable manner so as to be swingable and floating by the floating support portion 62. Specifically, since the two floating support portions 62 are fixedly supported by tightening bolts and nuts, it is preferable that the floating support portion 62 has a gap between the bolt and the hole through which the bolt is inserted. Further, it is more preferable that the gap is narrow in the vertical direction and about twice as wide in the front-rear direction as the gap in the vertical direction. According to such a configuration, even for slight liquid level fluctuations caused by weak waves, and further for large liquid level fluctuations caused by strong waves, the recovery port 3 can instantaneously follow and swing to an inclined state corresponding to the liquid level fluctuations, and the slide tube portion 42 can also instantaneously follow the liquid level fluctuations and vary in length. Therefore, it is possible to recover liquid level floating objects S of various sizes and thicknesses floating in various directions around the recovery port 3 and suppress the suction of excessive moisture. Further, when the liquid level floating object S enters through the opening 31, even if the liquid level floating object S has a thickness, it becomes easier to recover and suck due to the inclination of the recovery port 3.

[0031] The slide tube portion 42 connected to the lower part of the recovery port 3 is configured to be variable in length according to the liquid level fluctuations, and as shown in this embodiment, it is preferably a telescopic configuration that expands and contracts in the vertical direction. Further, the slide tube portion 42 is preferably formed of a lightweight material such as synthetic resin so that the length can be instantaneously and appropriately varied according to the liquid level fluctuations. In addition, the slide tube portion 42 shown in this embodiment has a three-stage configuration as shown in FIG. 3, but it may have a two-stage configuration or a four-stage configuration or more according to the liquid level fluctuation range, or the length of each stage can be appropriately set to any length.

[0032] The main pipe portion 41 is connected to the lower end of the slide pipe portion 42 via a connecting pipe portion 43 at its lower end, and its upper end is connected to the liquid supply pipe 7. It is inserted into the gap portion 51 of the float portion 5 near the liquid surface to support the float portion 5 in a floating state. Therefore, it is a major structural member of the liquid surface floating matter recovery device 1. For this reason, it is preferable that the main pipe portion 41 is formed of a hard material such as hard resin, aluminum, or stainless steel.

[0033] The float portion 5 floats vertically according to the liquid level that varies depending on the amount of the liquid C in the liquid tank 2 because the main pipe portion 41 of the recovery pipe 4 is inserted vertically in a floating state into the gap portion 51 thereof and floats in the liquid tank 2. The shape of the float portion 5 from the portion exposed above the liquid surface to the portion sinking directly below the liquid surface, that is, the shape of the portion where waves or the like generated on the liquid surface hit, is preferably boat-shaped when viewed in plan as shown in FIG. 2. Further, it is particularly preferable that the portion corresponding to the bow of this boat shape faces the direction of the recovery port portion 3. Also, it is preferable that the float portion 5 is configured such that its buoyancy can be adjusted by incorporating a weight W or adding it by attachment or the like. According to such a configuration, the water flow toward the float portion 5 is received so as to divide left and right by the portion corresponding to the bow, thereby suppressing the turbulence of the water flow near the liquid surface generated from the downstream side position of the recovery port portion 3. Therefore, the liquid surface floating matter S that moves on the liquid surface along with the water flow reaches the recovery port portion 3 smoothly and is recovered.

[0034] Furthermore, it is preferable that the boat width of the portion of the float portion 5 configured in a boat shape as shown in FIG. 2 is smaller than the outer diameter of the recovery port portion 3. According to such a configuration, the water flow toward the float portion 5 can be received more smoothly, so that the turbulence of the water flow generated from the downstream side of the recovery port 4 can be significantly suppressed. In addition, various configurations of the float body such as the material and forming method of the float portion 5 can adopt publicly known and publicly used configurations as the float body used in this type of liquid surface floating matter recovery device.

[0035] The liquid surface floating matter recovery device 1 having the above configuration is preferably fixed and used by a fixing member 8 or the like to any one of the upper edge portion, the upper frame portion, and the outer wall portion of the liquid tank 2 (in the present embodiment shown in FIGS. 1 and 4, it is the upper frame portion 21).

[0036] The fixing member 8 shown in this embodiment includes a pedestal portion 81 attached and fixed to the upper frame portion 21 of the liquid tank 2 by magnetic force or the like, a shaft portion 82 erected on the pedestal portion 81, and an attachment portion 83 that can be fixed at an arbitrary position in the vertical direction with respect to the shaft portion 82 and holds and fixes the upper portion of the main pipe portion 41 of the recovery pipe 4. According to such a configuration, the liquid surface floating matter recovery device 1 can be easily disposed at a desired position in the liquid tank 2. In addition, the pedestal portion 81 is not limited to being fixed by magnetic force, and can also be fixed to the liquid tank 2 or the like by fastening means such as bolts and nuts or other clamping means. Furthermore, the attachment portion 83 is not limited to holding and fixing, and means for sandwiching and fixing the upper portion of the main pipe portion 41 can also be used.

[0037] As described above, the liquid surface floating matter recovery device according to the present invention has been described based on the embodiments. However, the present invention is not limited to the above embodiments, and other aspects can be adopted within the scope of the present invention.

[0038] In the above embodiment shown in FIGS. 1, 3 to 4, the slide pipe portion 42 of the recovery pipe 4 has a three-stage telescopic configuration. However, as long as it is a configuration in which the upper end is connected to the lower part of the recovery port portion 3 and extends toward the bottom of the liquid tank 2 and the relative length can be made variable according to the liquid level fluctuation, it can also be a flexible hose configuration that bends according to the liquid level fluctuation.

[0039] Also, in the above embodiment shown in FIGS. 1, 3 to 4, the recovery pipe 4 is configured such that the lower end of the main pipe portion 41 and the lower end of the slide pipe portion 42 are connected by a connecting pipe portion 43 having a separate configuration. However, as shown in FIG. 5, the lower end of the main pipe portion 41, the connecting pipe portion 43, and the lower end of the slide pipe portion 42 can also be integrally configured.

[0040] The recovery port 3 is preferably configured to be replaceable with those having different diameters and shapes of the opening 31 according to the flow rate in the liquid tank 2, the types of floating substances on the liquid surface to be recovered, and the like.

[0041] In the above-described embodiments shown in FIGS. 1 to 4, the float portion 5 is configured such that only one is disposed at one location on the downstream side of the recovery port 3. However, it is not limited to one location as long as it is on the downstream side, and a plurality of float portions may be disposed. Further, it is not limited to one float body per location, and a float body divided into two or more may be used.

Explanation of Reference Numerals

[0042] 1 Liquid surface floating substance recovery device 2 Liquid tank 21 Upper frame portion 3 Recovery port 31 Opening 32 Peripheral edge portion 4 Recovery pipe 41 Main pipe portion 42 Slide pipe portion 43 Connection pipe portion 5 Float portion 51 Gap portion 52 Boat-shaped portion 6 Support member 61 Fixed support portion 62 Floating support portion 7 Liquid supply pipe 8 Fixing member 81 Pedestal portion 82 Shaft portion 83 Mounting portion C Liquid S Liquid surface floating substance W Weight

Claims

1. A recovery port section for sucking and recovering floating substances on the liquid surface, A recovery pipe that serves as a liquid delivery passage for sending the floating substances on the liquid surface sucked at the recovery port section to a separation and recovery device outside the liquid tank, A float section that floats the recovery port section directly below the liquid surface via a support member, In a floating substance recovery device on the liquid surface configured to have the above, The recovery pipe has a main pipe section made of a rigid pipe that extends vertically from above the liquid surface toward the bottom of the liquid tank with its upper end connected to a liquid delivery pipe connected to a separation and recovery device outside the liquid tank, a slide pipe section with its upper end connected to the lower part of the recovery port section and extending toward the bottom of the liquid tank, and the length of which can be variably adjusted according to the fluctuation of the liquid surface, and a connection pipe section that connects the lower end of the main pipe section and the lower end of the slide pipe section near the bottom of the liquid tank, The float section is disposed with a gap provided on the downstream side in the water flow direction near the liquid surface with respect to the recovery port section, and a void section that vertically penetrates in the vertical direction is further provided in the central part, and the main pipe section of the recovery pipe is inserted into this void section in a floating state in the vertical direction, A floating substance recovery device on the liquid surface, characterized by the above.

2. The floating substance recovery device on the liquid surface according to Claim 1, characterized in that the slide pipe section has a telescopic configuration that expands and contracts in the vertical direction.

3. The floating substance recovery device on the liquid surface according to Claim 1, characterized in that the shape of the float section from the part exposed above the liquid surface to the part sinking directly below the liquid surface is boat-shaped in plan view, and the part corresponding to the bow of this boat-shaped structure faces the direction of the recovery port section.

4. The floating substance recovery device on the liquid surface according to Claim 3, characterized in that the boat width of the boat-shaped part of the float section is smaller than the outer diameter of the recovery port section.

5. The floating substance recovery device on the liquid surface according to Claim 1, characterized in that the peripheral edge of the opening of the recovery port section has a float structure.

6. The floating substance recovery device on the liquid surface according to Claim 1, characterized in that the lower end of the main pipe section, the connection pipe section, and the lower end of the slide pipe section are integrally formed.

7. It has a fixing member that can be fixed to any of the upper edge part, upper frame part, and outer wall part of the liquid tank, and a mounting part provided on the fixing member, The floating substance recovery device according to any one of Claims 1 to 6, characterized in that the floating substance recovery device is disposed at a desired position in the liquid tank by mounting and fixing the upper part of the main pipe section of the recovery pipe to the mounting part.

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