Animal recovery device

Abstract

To provide a fluid recovery device that improves the operating environment of the device while requiring relatively low maintenance. [Solution] The fluid recovery device 1 comprises an oil rotary vacuum pump 10 having an intake section 12a and an exhaust section 11a, a vacuum tank 20, an exhaust passage section 30 having a silencer 40 and a connecting pipe 50, and an oil mist recovery pipe 70. The oil rotary vacuum pump 10 draws air from the vacuum tank 20 through the intake section 12a. The exhaust from the oil rotary vacuum pump 10, which contains oil mist, is discharged from the exhaust section 11a and flows into the connecting pipe 50. A portion of the exhaust discharged from the exhaust section 11a is exhausted into the vacuum tank 20 through the oil mist recovery pipe 70. The remaining exhaust flows into the silencer 40, passes through multiple passage holes, and is discharged to the outside of the fluid recovery device 1. The inner diameter of the oil mist recovery pipe 70 is smaller than the inner diameter of the suction pipe 80.

Description

Technical Field

[0001] The present invention relates to a recovery device for flowing substances.

Background Art

[0002] Conventionally, a vacuum pump may be used for the purpose of recovering flowing substances such as oil. Patent Document 1 relates to an example of such a device. The device of Patent Document 1 reduces the pressure in the recovery tank of the flowing substance by a vacuum pump and sucks the flowing substance from the suction port at the tip of the suction pipe connected to the recovery tank of the flowing substance.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As a vacuum pump used in the above-described device, an oil rotary vacuum pump may be used for the purpose of improving the efficiency and compactness of the entire device. However, the oil rotary vacuum pump has a problem that a large amount of oil fume (oil mist) is contained in the exhaust from the exhaust part of the vacuum pump body. If a large amount of oil fume is contained in the final exhaust, the usage environment of the device will deteriorate due to the oil fume.

[0005] To address such problems, components such as a silencer and an oil mist trap for reducing oil fume are installed in the exhaust part. However, the higher the capacity of the component for reducing oil fume, the more likely oil will accumulate inside the component, and frequent maintenance is required. Also, if the capacity of the component for reducing oil fume is low, the need for maintenance decreases, but oil fume is likely to be contained in the final exhaust.

[0006] The objective of the present invention is to provide a fluid recovery device that improves the operating environment of the device while also requiring relatively low maintenance. [Means for solving the problem]

[0007] The fluid recovery device of the present invention comprises an oil rotary vacuum pump having an intake section and an exhaust section, and a fluid storage container connected to the intake section and whose pressure is reduced by the vacuum pump, and is a fluid recovery device that sucks fluid into the storage container from an external device connected to the storage container, and further comprises an exhaust passage section having one end connected to the exhaust section and an exhaust port to the outside formed at the other end, a hole forming body installed in the exhaust passage section and having a plurality of through holes formed therein to allow exhaust from the exhaust section to pass toward the exhaust port, and an oil mist recovery pipe between the exhaust section and the hole forming body, with one end connected to the exhaust passage section and the other end connected to the storage container, wherein when exhaust from the exhaust section passes through the exhaust passage section and flows out to the outside from the exhaust port, a portion of the oil mist contained in the exhaust from the exhaust section is recovered into the storage container through the oil mist recovery pipe, and the other portion of the oil mist is captured by the hole forming body.

[0008] In the fluid recovery device of the present invention, a portion of the oil mist in the exhaust from the exhaust section is recovered into a storage container through an oil mist recovery pipe connected between the perforated body and the exhaust section. As a result, the amount of oil mist in the exhaust directed toward the perforated body is reduced. Furthermore, a portion of the oil mist from the exhaust is captured by the perforated body. Therefore, the amount of oil mist in the exhaust that ultimately flows out from the exhaust port is greatly reduced. In addition, since the amount of oil mist captured by the perforated body is also reduced, the need for maintenance of the perforated body is also reduced.

[0009] As a result, a fluid recovery device is realized that improves the operating environment of the device while also requiring relatively low maintenance.

[0010] In the present invention, a suction pipe is further provided to connect the intake section and the storage container, and it is preferable that the inner diameter of the oil mist recovery pipe is smaller than the inner diameter of the suction pipe.

[0011] The inner diameter of the oil mist recovery pipe is smaller than the inner diameter of the suction pipe. Therefore, the ability of the vacuum pump to collect oil mist from the exhaust into the storage container through the oil mist recovery pipe does not become excessively high compared to the vacuum pump's ability to draw air into the storage container through the suction pipe. Thus, it is possible to avoid the pressure inside the storage container becoming too high (the vacuum level becoming too low) due to the collection of oil mist. [Brief explanation of the drawing]

[0012] [Figure 1] This is a schematic diagram of the fluid recovery device of the present invention. [Figure 2] Figure 1 shows a cross-sectional view of the exhaust passage section, enclosed by the dashed line II, and the connection point between the exhaust passage section and the oil mist recovery pipe. [Modes for carrying out the invention]

[0013] A fluid recovery device 1 according to one embodiment of the present invention will be described with reference to Figures 1 and 2. The fluid recovery device 1 is a device that sucks up old engine oil from the suction port or supply port of the engine room, etc., and is used, for example, to change the engine oil (fluid in this invention) of automobiles, ships, etc. As shown in Figure 1, the fluid recovery device 1 has an oil rotary vacuum pump 10 (vacuum pump in this invention), a vacuum tank 20 (storage container in this invention), an exhaust passage section 30, an oil mist recovery pipe 70, a suction pipe 80 and a suction pipe 90.

[0014] The oil-sealed rotary vacuum pump 10 is a cylindrical device equipped with a battery for driving. As shown in Figure 1, the oil-sealed rotary vacuum pump 10 has an upper wall 11 and a bottom wall 12. The upper wall 11 has an exhaust section 11a. The exhaust section 11a is connected to an exhaust passage section 30. The bottom wall 12 has an intake section 12a. The intake section 12a is connected to a vacuum tank 20 via a suction pipe 80. The oil-sealed rotary vacuum pump 10 comprises a rotor and a cylinder. The rotor is housed in the cylinder. The cylinder is filled with oil. When the oil-sealed rotary vacuum pump 10 is operated, the rotor rotates, drawing air from the vacuum tank 20 from the intake section 12a into the cylinder, compressing it, and then discharging it from the exhaust section 11a into the exhaust passage section 30. This process is repeated, causing the pressure in the vacuum tank 20 to decrease. At that time, the oil inside the cylinder is atomized into oil mist (oil smoke), which is included in the total exhaust (described later) as shown in Figure 2 and discharged from the oil rotary vacuum pump 10 along with the air.

[0015] The vacuum tank 20 is a cylindrical vacuum container made of synthetic resin (for example, polyvinyl chloride). However, the material of the vacuum tank 20 may be other than synthetic resin; for example, it may be metal. As shown in Figure 1, the vacuum tank 20 has an upper wall 21 and a bottom wall 22. The upper wall 21 is connected to an oil mist recovery pipe 70, a suction pipe 80, and a suction pipe 90. The suction pipe 90 is inserted into the suction port or supply port of the engine room of an external device subject to oil changes, such as an engine in a car or ship.

[0016] As shown in Figure 2, the exhaust passage section 30 includes a silencer 40 and a connecting pipe 50. One end of the connecting pipe 50 is connected to the silencer 40, and the other end is connected to the exhaust section 11a. The connecting pipe 50 allows exhaust from the exhaust section 11a of the oil rotary vacuum pump 10 to flow into the silencer 40. The silencer 40 includes a main body 41, a hole-forming body 45, and a lid 46. The main body 41 is a cylindrical container. The main body 41 has an upper wall 42 and a lower wall 43. A connecting port 43a is formed in the lower wall 43. The inner diameter of the connecting port 43a is about the same as the inner diameter of the connecting pipe 50. The main body 41 is connected to the connecting pipe 50 through the connecting port 43a. An exhaust port 42a is formed in the upper wall 42. The inner diameter of the exhaust port 42a is about the same as the inner diameter of the connecting port 43a. The pore-forming body 45 is housed without any gaps inside the main body 41. The pore-forming body 45 is a porous metal or synthetic resin component and has multiple through holes. The lid 46 has an outer edge that extends downward and covers the upper wall 42. Ribs are formed on the inside of the lid 46. When the lid 46 is placed on top of the main body 41, the ribs create a gap between the main body 41 and the lid 46.

[0017] The oil mist recovery pipe 70 is made of a tubular component made of synthetic resin. One end of the oil mist recovery pipe 70 is connected to the connecting pipe 50, and the other end is connected to the vacuum tank 20. The inner diameter of the oil mist recovery pipe 70 is smaller than the inner diameter of the suction pipe 80.

[0018] As shown in Figure 2, exhaust containing oil mist from the oil rotary vacuum pump 10 is discharged from the exhaust section 11a and flows into the connecting pipe 50 of the exhaust passage section 30. Of all the exhaust discharged from the exhaust section 11a (hereinafter referred to as "total exhaust"), exhaust a is discharged to the vacuum tank 20 through the oil mist recovery pipe 70. At this time, the oil mist contained in exhaust a is recovered in the vacuum tank 20. Of the total exhaust that has passed through the connecting pipe 50, the remaining portion, exhaust b, flows into the body 41 of the silencer 40 through a connecting port 43a formed in the body 41. This exhaust b passes through a plurality of through holes formed in the hole-forming body 45 inside the body 41 and is discharged upward from the exhaust port 42a of the body 41. The exhaust b from the body 41 passes through the gap between the lid 46 and the body 41 and is discharged to the outside of the fluid recovery device 1.

[0019] As described above, when the entire exhaust from the oil rotary vacuum pump 10 passes through the exhaust passage 30, some of the exhaust a is recovered into the vacuum tank 20, so that only the remaining exhaust b flows into the silencer 40. The silencer 40 reduces the flow noise generated by the flow of exhaust b by passing this exhaust b through the pore-forming body 45, and also captures the oil mist contained in exhaust b with the pore-forming body 45.

[0020] The following describes how to use the fluid recovery device 1. First, the oil rotary vacuum pump 10 is activated. When the oil rotary vacuum pump 10 is activated, air from the vacuum tank 20 is drawn into the cylinder through the suction pipe 80 and the intake section 12a, and then discharged from the exhaust section 11a to the exhaust passage section 30. This reduces the pressure in the vacuum tank 20. Next, the suction pipe 90 is inserted into the suction port in the engine compartment or the like. This draws engine oil from the engine compartment through the suction pipe 90 into the vacuum tank 20.

[0021] When the oil rotary vacuum pump 10 is operating, the oil in the cylinder of the oil rotary vacuum pump 10 becomes atomized into an oil mist, and is discharged from the exhaust part 11a to the communication pipe 50 together with the air sucked from the vacuum tank 20 into the cylinder. Thus, a part of the total exhaust gas discharged, namely exhaust gas a, is exhausted into the vacuum tank 20 through the oil fume recovery pipe 70. At that time, the oil mist contained in the exhaust gas a is recovered by the vacuum tank 20. Of the total exhaust gas that has passed through the communication pipe 50, the remaining part, namely exhaust gas b, flows into the main body 41 through the communication port 43a formed in the main body 41 of the silencer 40. This exhaust gas b passes through a plurality of through holes formed in the hole forming body 45 in the main body 41 and is discharged from the exhaust port 42a above the main body 41. The exhaust gas b from the main body 41 passes through the gap between the lid 46 and the main body 41 and is discharged to the outside of the fluid recovery device 1. At that time, the oil mist in the exhaust gas b is captured by the hole forming body 45.

[0022] When the suction of the engine oil is completed, stop the oil rotary vacuum pump 10.

[0023] As described above, according to the fluid recovery device 1, a part of the exhaust gas a, which is a part of the oil mist in the total exhaust gas from the exhaust part 11a, is recovered by the vacuum tank 20 through the oil fume recovery pipe 70 connected to the communication pipe 50. For this reason, what goes toward the hole forming body 45 of the silencer 40 is the remaining exhaust gas b, which is the total exhaust gas from the exhaust part 11a excluding the exhaust gas a. By reducing the exhaust gas flowing toward the hole forming body 45 in this way, the oil mist in the exhaust gas flowing toward the hole forming body 45 is also reduced. And a part of the oil mist is captured from the exhaust gas b by the hole forming body 45. In this way, the oil mist contained in the total exhaust gas is removed from the total exhaust gas in two stages, so that the oil mist in the exhaust gas b finally flowing out from the exhaust port 42a is greatly reduced. Also, since a part of the oil mist in the total exhaust gas is recovered by the vacuum tank 20, the oil mist captured by the hole forming body 45 is also reduced, so the necessity for maintenance of the hole forming body 45 is also reduced.

[0024] Therefore, a fluid recovery device 1 that improves the usage environment of the device while having a relatively low necessity for maintenance is realized.

[0025] Also, the inner diameter of the oil fume recovery pipe 70 is smaller than the inner diameter of the suction pipe 80. Therefore, the ability to recover the oil mist in the exhaust a into the vacuum tank 20 through the oil fume recovery pipe 70 does not become too high compared to the ability of the oil rotary vacuum pump 10 to suck the inside of the vacuum tank 20 through the suction pipe 80. Thus, it is possible to avoid the pressure inside the vacuum tank 20 becoming too high (the degree of vacuum decreasing too much) due to the recovery of the oil mist. More preferably, when the suction of the inside of the vacuum tank 20 by the oil rotary vacuum pump 10 and the recovery of the oil mist in the exhaust a through the oil fume recovery pipe 70 into the vacuum tank 20 are performed simultaneously, it is preferable that the pressure inside the vacuum tank 20 is maintained or the pressure can be decreased. From the viewpoint of preventing the ability to recover the oil mist in the exhaust a into the vacuum tank 20 through the oil fume recovery pipe 70 from becoming too high, it is preferable that the amount of oil mist recovered into the vacuum tank 20 is less than the amount of oil mist captured by the pore-forming body 45. Specifically, it is preferable that the amount of oil mist recovered into the vacuum tank 20 per unit time is smaller than the amount of oil mist captured by the pore-forming body 45 per unit time. In one example, the ratio of the former amount to the latter amount is about 1:4.

[0026] As described above, the embodiments of the present invention have been described based on the drawings, but the specific configuration should be considered not to be limited to these embodiments. The scope of the present invention is shown not only by the description of the above embodiments but also by the claims, and further includes all modifications within the meaning and scope equivalent to the claims. Hereinafter, modification examples according to the above embodiments will be described. Also, for parts common to the above embodiments, the same reference numerals as above are used and the description will be omitted as appropriate.

[0027] In the above-described embodiment, a silencer 40 is used. The silencer 40 is mainly used to reduce the exhaust flow noise and has a relatively low ability to reduce oil mist contained in the exhaust from the oil rotary vacuum pump 10. Alternatively, an oil mist trap with a higher ability to reduce oil mist may be used. In this case, from the viewpoint of reducing the oil mist in the exhaust ultimately discharged from the exhaust port 42a, the importance of recovering the oil mist in the vacuum tank 20 through the oil mist recovery pipe 70 is lower compared to when the silencer 40 is used. On the other hand, from the viewpoint of reducing the amount of oil mist captured by the oil mist trap and reducing the need for maintenance of the oil mist trap, the importance of recovering the oil mist in the vacuum tank 20 through the oil mist recovery pipe 70 is higher compared to when the silencer 40 is used.

[0028] In the above-described embodiment, the oil mist recovery pipe 70 is made of a tubular member made of synthetic resin. This oil mist recovery pipe 70 may be a flexible hose or a rigid member such as a metal pipe.

[0029] The fluid to be recovered by the fluid recovery device 1 according to the above embodiment is assumed to be engine oil. However, the fluid may also be grease or waste ink remaining in machinery, etc. [Explanation of Symbols]

[0030] 1. Fluid recovery device 10. Oil-sealed rotary vacuum pump 11a Exhaust section 12a Intake section 20 Vacuum Tanks 30 Exhaust passage section 42a Exhaust port 45 Pore former 70 Oil mist recovery pipe 80 Suction tube

Claims

1. A fluid recovery device comprising an oil-sealed rotary vacuum pump having an intake section and an exhaust section, and a fluid storage container connected to the intake section and whose pressure is reduced by the vacuum pump, wherein a fluid is drawn into the storage container from an external device connected to the storage container, An exhaust passage section, one end of which is connected to the exhaust section and the other end of which has an exhaust port to the outside, A hole-forming body is installed within the exhaust passage and has a plurality of through holes formed therein that allow exhaust from the exhaust section to pass toward the exhaust port, The exhaust section and the hole-forming body further include an oil mist recovery pipe, one end of which is connected to the exhaust passage section and the other end of which is connected to the storage container. A fluid recovery device characterized in that, when exhaust from the exhaust section passes through the exhaust passage and flows out to the outside from the exhaust port, a portion of the oil mist contained in the exhaust from the exhaust section is recovered into the storage container through the oil mist recovery pipe, and the other portion of the oil mist is captured by the pore-forming body.

2. The system further includes a suction pipe connecting the intake section and the storage container. The fluid recovery device according to claim 1, characterized in that the inner diameter of the oil mist recovery pipe is smaller than the inner diameter of the suction pipe.

Images