Foreign matter removing device

Abstract

A foreign matter removal device (1) for removing foreign matters contained in a fluid in a pipe using a swirling flow generated in a collection unit (2) in which the fluid is caused to flow into the collection unit (2) and is separated into an inner fluid flowing inside a separation unit (5) and an outer fluid flowing outside the separation unit (5). A first foreign matter contained in the outer fluid and having a specific gravity that is greater than the specific gravity of the fluid is captured in a gap between the inner wall of the capturing section (2) and the separation section (5), and a second foreign matter contained in the inner fluid and having a specific gravity that is less than the specific gravity of the fluid is promoted to be separated by the gas-liquid separation section (11). The foreign matter is discharged to the outside from the foreign matter discharge member (8) via a foreign matter discharge member connection part (9) provided at the top vertically above the center part of the collection part (2).

Description

Technical Field

[0001] The present application relates to a foreign matter removing device. Background Art

[0002] There is known a foreign matter removal device that utilizes swirling flow and gravity sedimentation to remove foreign matter contained in a fluid in a pipe (see, for example, Patent Document 1). This foreign matter removal device removes foreign matter such as rust, insoluble salts, corrosion products, etc. that may be contained in a fluid such as water flowing in a pipe, and helps to suppress damage in the pipe.

[0003] The foreign matter removal device is used, for example, in a heat pump type hot water heating system having a circulating water circuit using an iron radiator and iron piping. The iron radiator and iron piping of the circulating water circuit may generate foreign matter such as rust in the fluid in the circulating water circuit. Therefore, the conventional foreign matter removal device is used to remove foreign matter such as rust that has a greater specific gravity than the fluid.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2007-127026 Summary of the invention

[0007] Problems to be solved by the invention

[0008] However, in a circuit where a fluid flows, in addition to foreign matter such as rust having a greater specific gravity than the fluid, foreign matter such as air having a smaller specific gravity than the fluid may also be generated. For example, in a heat pump type hot water heating system as described above, air dissolved in the fluid in the circuit may be generated as bubbles due to the temperature rise that depends on the operation of the hot water heating system. Since the generated bubbles may also affect the pump, a foreign matter removal device that can more appropriately remove foreign matter such as bubbles having a smaller specific gravity than the fluid is required.

[0009] The present application is completed in view of the above situation, and its purpose is to provide a foreign matter removal device that can remove foreign matter such as rust whose specific gravity is greater than that of the fluid, and further improve the ability to remove foreign matter such as bubbles whose specific gravity is smaller than that of the fluid.

[0010] Means for solving problems

[0011] The foreign matter removal device disclosed in the present application uses a swirling flow in a cylindrical collection unit to remove foreign matter contained in a fluid in a pipe, and is characterized in that the foreign matter removal device comprises:

[0012] an inflow portion that allows the fluid to flow into the collection portion;

[0013] a separation portion, the separation portion being disposed at the bottom of the collection portion and having a cylindrical structure, and separating the fluid flowing in from the inflow portion into an inner fluid of the swirling flow flowing inside the cylindrical structure and an outer fluid of the swirling flow flowing outside the cylindrical structure;

[0014] an outflow portion, the outflow portion allowing the inner fluid separated by the separation portion to flow out from the collecting portion;

[0015] a rectifying plate disposed at a central portion of the collecting portion and above the inlet portion; and

[0016] The gas-liquid separation section is disposed at a central portion of the collection section and below the inflow section, and suppresses the swirling flow from flowing in a direction toward the outflow section.

[0017] Effects of the Invention

[0018] According to the foreign matter removing device disclosed in the present application, it is possible to remove foreign matter such as rust having a larger specific gravity than the fluid, and further improve the ability to remove foreign matter such as bubbles having a smaller specific gravity than the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an explanatory diagram schematically showing the foreign matter removal device according to the first embodiment.

[0020] Figure 2 It means viewing from the AA side. Figure 1 A diagram showing the configuration of each structure.

[0021] Figure 3 This is a diagram showing the shape of the rectifying plate of the foreign matter removal device according to the first embodiment.

[0022] Figure 4 This is a diagram for explaining the shape of the gas-liquid separation unit of the foreign matter removal device according to the first embodiment.

[0023] Figure 5 This is a diagram for explaining another installation state of the gas-liquid separation unit of the foreign matter removal device according to the first embodiment. DETAILED DESCRIPTION

[0024] Hereinafter, with reference to the accompanying drawings, the embodiment of the foreign matter removal device disclosed in the present application is described in detail. It should be noted that the embodiment shown below is an example, and the present application is not limited to this embodiment. It should be noted that, unless otherwise specified, the vertical direction refers to the up-down direction of the paper, and the horizontal direction refers to the left-right direction of the paper.

[0025] Implementation method 1.

[0026] Figure 1 This is an explanatory diagram schematically showing the foreign matter removal device 1 according to the first embodiment. Figure 2Viewed from the AA side Figure 1 . The foreign matter removal device 1 is provided in a circuit where a fluid such as water flows. The foreign matter removal device 1 is a device for removing foreign matter contained in an inflowing fluid and causing the fluid to flow out, and comprises a collecting portion 2, an inflow portion 3, an outflow portion 4, a separating portion 5, a first foreign matter capturing portion 6, a first foreign matter discharge member 7, a second foreign matter discharge member 8, a second foreign matter discharge member connecting portion 9, a rectifying plate 10, a gas-liquid separation portion 11, a support 12, etc. Figure 1 as well as Figure 2 In FIG. 1 , arrows are used to indicate the movement direction of the fluid flowing in the foreign matter removing device 1. In addition, in the figure, the dotted lines are used to indicate the inner wall or invisible parts through the dotted lines.

[0027] The collecting part 2 is a hollow cylindrical structure. When the foreign matter removing device 1 is provided in a fluid flow circuit, as shown in FIG. Figure 1 As shown in the example, the collecting part 2 is arranged to extend in the vertical direction. The collecting part 2 can be made of metal such as stainless steel, brass, copper, aluminum, steel, etc., and can also be made of resin such as polytetrafluoroethylene (Teflon (registered trademark) resin), polyvinyl chloride, polyethylene, polystyrene, polypropylene, polysulfone, isoprene rubber, butadiene rubber, styrene butadiene rubber, aromatic polyamide (nylon 6 or nylon 6-6, etc.), ABS (acrylonitrile butadiene styrene), acrylic acid, carbon fiber reinforced plastic, etc.

[0028] The inflow portion 3 constitutes a flow path for the fluid flowing in the circuit to flow into the collection portion 2. Figure 1 As illustrated, one end of the inflow portion 3 is connected to the upper portion of the collecting portion 2, and the other end of the inflow portion 3 is connected to the circuit via a pipe, and the fluid enters in the direction of arrow B from the circuit side.

[0029] The outflow portion 4 constitutes a flow path for causing the fluid flowing in the collection portion 2 to flow out to a circuit outside the collection portion 2. Figure 1 As shown, one end of the outflow section 4 is connected to the collection section 2, and the other end of the outflow section 4 is connected to the circuit via a pipe. The inner fluid of the swirling flow flowing inside the cylindrical structure of the separation section 5 described later is discharged to the circuit outside the collection section 2 via the outflow section 4.

[0030] like Figure 2 As shown in the example, the inlet portion 3 is configured so that the fluid flowing in the inlet portion 3 generates a swirling flow in the collection portion 2. With this configuration, it is possible to prevent the fluid flowing into the foreign matter removal device 1 from flowing out of the foreign matter removal device 1 directly from the outflow portion 4 in a straight line. In other words, the fluid flowing from the inlet portion 3 into the collection portion 2 is formed along the Figure 2 The outer periphery of the collecting portion 2 having a circular cross section in the horizontal direction shown in the figure rolls up a swirling flow of a vortex in the collecting portion 2 and descends, and the descending swirling flow flows out from the outflow portion 4 to the outside.

[0031] The separation part 5 is a separation component for separating the fluid flowing in from the inflow part 3 into the outer peripheral side and the center side in the collection part 2. The separation part 5 is a hollow cylindrical structure disposed at a predetermined position inside the collection part 2 separated from the outer periphery, and is a cylindrical component in this embodiment. Figure 2 As shown, the inner diameter of the separation part 5 is smaller than the inner diameter of the collection part 2 where the separation part 5 is arranged. As a result, a gap (hereinafter referred to as the first foreign matter capture part 6) is formed between the inner wall of the collection part 2 and the separation part 5. With such a structure, the fluid flowing into the foreign matter removal device 1 is separated into the inner fluid of the swirling flow flowing inside the separation part 5 and the outer fluid of the swirling flow flowing outside the separation part 5 in the collection part 2.

[0032] like Figure 1 As shown, the separator 5 is disposed below the collection section 2. For example, the separator 5 is disposed vertically below the inflow section 3 at the bottom of the collection section 2. The outflow section 4 is also disposed vertically below the inflow section 3.

[0033] The separation part 5 is arranged at the same position in the vertical direction as the connection portion of the collection part 2 connected to the outflow part 4. In the present embodiment, the outflow part 4 is formed as a cylindrical structure penetrating the separation part 5 and the collection part 2.

[0034] With such a structure, foreign matter such as rust contained in the fluid and having a specific gravity greater than that of the fluid (hereinafter referred to as first foreign matter) is collected in the first foreign matter capturing portion 6 , and the inner fluid from which the first foreign matter has been removed flows out from the outflow portion 4 .

[0035] As described above, in the foreign matter removal device 1, the fluid flows in a whirlwind shape as a swirling flow in the collection section 2 to form a vortex. Due to the rotation of the vortex, centrifugal force acts and the fluid is pushed to the outside. That is, the outside of the fluid in the collection section 2 becomes high pressure, and the center side becomes low pressure. Furthermore, foreign matter such as bubbles having a smaller specific gravity than the fluid (hereinafter referred to as the second foreign matter) is concentrated in the horizontal center or near the center (hereinafter referred to as the central part) in the collection section 2 due to such a pressure difference, and floats due to the difference in specific gravity with the fluid.

[0036] On the other hand, the first foreign matter moves toward the outer peripheral side in the collecting section 2 due to such a pressure difference, and settles due to gravity and is concentrated at the lower part in the collecting section 2. In other words, the first foreign matter is concentrated outside the separation section 5 located in the collecting section 2. Therefore, the fluid from which not only the first foreign matter but also the second foreign matter is appropriately removed flows out from the outflow section 4.

[0037] The first foreign matter capturing part 6 for capturing the first foreign matter captures the first foreign matter that settles due to gravity and has a large specific gravity. The first foreign matter capturing part 6 is provided with a first foreign matter discharge member 7 extending vertically downward from the bottom of the collecting part 2 .

[0038] The first foreign matter discharge member 7 discharges the first foreign matter captured by the first foreign matter capturing portion 6. The first foreign matter discharge member 7 is, for example, a valve, and by being set to an open state, the first foreign matter captured by the first foreign matter capturing portion 6 is discharged to the outside. By providing the first foreign matter discharge member 7, even when the first foreign matter capturing portion 6 captures the first foreign matter, the amount of the first foreign matter captured by the first foreign matter capturing portion 6 can be reduced by discharging it to the outside, and even if the use period of the foreign matter removal device 1 becomes longer, the first foreign matter can continue to be effectively captured.

[0039] The second foreign matter discharge member 8 discharges the second foreign matter collected in the center of the collecting section 2. The second foreign matter discharge member 8 is, for example, an air valve, and by opening it, discharges the second foreign matter collected in the center of the collecting section 2 and floating to the outside.

[0040] The second foreign matter discharge member connecting portion 9 connects the second foreign matter discharge member 8 to the collecting portion 2. Specifically, Figure 1 As shown, the second foreign matter discharge member connection portion 9 is a space opened upward from the top of the inner wall in the center of the collecting portion 2 which is vertically above the outflow portion 4 and above the inflow portion 3. With such a structure, the second foreign matter collected in the center of the collecting portion 2 and floated flows into the second foreign matter discharge member connection portion 9 and floats toward the second foreign matter discharge member 8.

[0041] The rectifying plate 10 is disposed at the second foreign matter discharge member connection portion 9 to float the second foreign matter flowing into the second foreign matter discharge member connection portion 9. Figure 3 As shown in (a) to (d), the shape of the rectifying plate 10 is formed to divide the opening of the second foreign matter discharge member connection part 9, which can reduce the swirling flow in the second foreign matter discharge member connection part 9, so that the second foreign matter flowing into the second foreign matter discharge member connection part 9 floats toward the second foreign matter discharge member 8. In addition, the second foreign matter discharge member connection part 9 and the rectifying plate 10 can suppress the malfunction of the second foreign matter discharge member 8 caused by the descending swirling flow generated in the center of the collection part 2. For example, it is possible to reduce the situation where the float in the exhaust valve in the second foreign matter discharge member 8 sinks due to the descending swirling flow, thereby causing water leakage.

[0042] The gas-liquid separation section 11 is a component for suppressing the descending swirling flow generated in the center of the collecting section 2. The gas-liquid separation section 11 is arranged on the inner side of the collecting section 2 and at a position lower than the inlet section 3, and is supported by a support 12 which is a rod-shaped component, and the support 12 is fixed to the bottom of the collecting section 2. The gas-liquid separation section 11 is preferably arranged in the descending direction of the second foreign matter concentrated in the central part of the collecting section 2, and is arranged in the separation section 5 on the central axis C connecting the centers of the two bottom surfaces of the cylindrical collecting section 2. It should be noted that the outflow section 4 and the second foreign matter discharge member connecting section 9 are also arranged on the same central axis C, as shown in FIG. Figure 2 The configuration shown is on concentric circles.

[0043] like Figure 2 As shown, the gas-liquid separation part 11 is a circular plate-shaped component, but it can also be Figure 4 As shown in the shape of the cross section in the horizontal direction (direction perpendicular to the central axis C) in (a) and (b), it is a circular or polygonal plate-shaped member. In addition, the area of ​​the horizontal cross section can also be smaller than the outflow portion 4. In the case where the area is smaller than the outflow portion 4, the effect of suppressing the descending vortex flow becomes smaller, but the pressure loss of the foreign matter removal device 1 can be reduced. Figure 1 As shown, the plate-like member of the gas-liquid separation unit 11 extends in a direction perpendicular to the outflow direction from the outflow unit 4 .

[0044] The gas-liquid separation section 11 configured in this way suppresses the second foreign matter that flows into the collecting section 2 from the inlet section 3 and concentrates in the central portion of the collecting section 2 from flowing toward the outflow section 4 due to the descending swirling flow, thereby retaining the second foreign matter in the collecting section 2 and promoting the second foreign matter to float toward the second foreign matter discharge member 8.

[0045] It should be noted that in Figure 1 In the embodiment, the gas-liquid separation section 11 is supported by a support 12 fixed to the bottom of the collection section 2, but it may also be supported by a support 12 fixed to the bottom of the collection section 2. Figure 5 As shown, the gas-liquid separator 11 is supported by a support 12 fixed to the inner side of the collecting section 2. Alternatively, the separator 5 may be supported by a support from the side thereof. In addition, the gas-liquid separator 11 is arranged inside the separator 5, and the effect of suppressing the descending swirling flow flowing to the outflow section 4 is greater than that of the gas-liquid separator 11 arranged outside the separator 5.

[0046] As described above, according to the foreign matter removal device of this embodiment, foreign matter such as rust having a larger specific gravity than the fluid can be removed as the first foreign matter, and the removal capability of foreign matter such as bubbles having a smaller specific gravity than the fluid can be further improved.

[0047] This application describes exemplary embodiments, but various features, methods, and functions described in the embodiments are not limited to application to specific embodiments and can be applied to the embodiments alone or in various combinations.

[0048] Therefore, numerous modifications not shown in the examples are conceivable within the technical scope disclosed in the present specification, including, for example, modifications, additions, or omissions of at least one component.

[0049] Description of Reference Numerals

[0050] 1: foreign matter removal device, 2: collecting part, 3: inflow part, 4: outflow part, 5: separation part, 6: first foreign matter capturing part, 7: first foreign matter discharge member, 8: second foreign matter discharge member, 9: second foreign matter discharge member connecting part, 10: rectifying plate, 11: gas-liquid separation part, 12: support.

Claims

1. A foreign matter removal device, which uses a swirling flow in a cylindrical collecting portion to remove foreign matter contained in a fluid in a pipe, characterized in that: The foreign matter removal device comprises: an inflow portion that allows the fluid to flow into the collecting portion; a separation portion, the separation portion being disposed at the bottom of the collection portion and having a cylindrical structure, and separating the fluid flowing in from the inflow portion into an inner fluid of the swirling flow flowing inside the cylindrical structure and an outer fluid of the swirling flow flowing outside the cylindrical structure; an outflow portion, the outflow portion allowing the inner fluid separated by the separation portion to flow out from the collecting portion; a rectifying plate disposed at a central portion of the collecting portion and above the inlet portion; as well as The gas-liquid separation section is disposed at a central portion of the collecting section and below the inlet section, and suppresses the swirling flow from flowing in a direction toward the outflow section.

2. A foreign matter removal device, characterized in that: The foreign matter removal device comprises: A cylindrical collecting portion, wherein the cylindrical collecting portion captures foreign matter in the fluid; an inflow portion, the inflow portion being connected to an upper portion of the collecting portion so as to cause the fluid flowing into the collecting portion to generate a swirling flow; a separation section, the separation section being composed of a cylindrical structure disposed at the bottom of the collecting section with a gap between the separation section and the inner wall of the collecting section, and separating the swirling flow into an inner fluid flowing inside the cylindrical structure and an outer fluid flowing outside the cylindrical structure; an outflow portion, the outflow portion being formed as a cylindrical structure penetrating the separation portion and the collection portion, so that the inner fluid flows out of the collection portion; a foreign matter discharge member connecting portion having an opening formed at a top center portion of the collecting portion; a foreign matter discharge member connected to the foreign matter discharge member connecting portion; A rectifying plate, the rectifying plate being arranged at the connecting portion of the foreign matter discharge component; as well as a gas-liquid separation section, the gas-liquid separation section being arranged at a central portion of the collecting section and at a position lower than the inlet section, and suppressing the swirling flow from flowing in a direction of the outflow section, The first foreign matter contained in the outer fluid and having a specific gravity heavier than that of the fluid is captured in the gap between the inner wall of the collecting portion and the cylindrical structure, and the second foreign matter contained in the inner fluid and having a specific gravity lighter than that of the fluid is retained in the collecting portion through the gas-liquid separation portion, and the swirling flow is reduced by the rectifying plate, thereby the second foreign matter is discharged from the foreign matter discharge component to the outside via the foreign matter discharge component connecting portion.

3. The foreign matter removal device according to claim 1 or 2, characterized in that: The outflow portion is located below the inflow portion.

4. The foreign matter removal device according to claim 2, characterized in that: A first foreign matter outflow portion is provided, which is formed at the bottom of the collecting portion at a gap between an inner wall of the collecting portion and the cylindrical structure and discharges the first foreign matter to the outside of the collecting portion.

5. The foreign matter removal device according to any one of claims 1 to 4, characterized in that: The gas-liquid separation portion is a plate-shaped member extending in a direction perpendicular to the flow of the swirling flow toward the outflow portion.

6. The foreign matter removal device according to any one of claims 1 to 5, characterized in that: The gas-liquid separation unit is supported by a support column extending from the bottom of the collection unit.

7. The foreign matter removal device according to any one of claims 1 to 5, characterized in that: The gas-liquid separation unit is supported by a support column extending from an inner side surface of the collection unit.

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