Magnetic material recovery mechanism

Abstract

To provide a magnetic material recovery mechanism capable of easily carrying out magnetic material recovery work.SOLUTION: This magnetic material recovery mechanism comprises: a body 3 through which a fluid containing a magnetic material flows; a magnet 4 provided outside the body 3; and a magnet holder 6 that oscillates the magnet 4 around a shaft body 5 provided in the body 3 between an attraction state in which the magnet 4 is close to the outer surface of the body 3 and a separation state in which the magnet 4 is separated from the outer surface of the body 3. The magnetic material adsorbed on the inner surface of the body 3 by setting the magnet 4 in the attraction state is separated from the inner surface by setting the magnet 4 in the separation state to be recovered.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a magnetic material recovery mechanism employed in a device such as a foreign matter removal device that removes magnetic material from a fluid. [Background technology]

[0002] For example, in heating devices that use a fluid such as hot water as a heat transfer medium, the heating circuit through which the fluid circulates is often made of iron pipes, and magnetic materials such as iron powder can get mixed into the fluid from the inner walls of these iron pipes. Since magnetic materials can cause breakdowns in the pump that circulates the fluid, it is necessary to remove the magnetic materials from the fluid.

[0003] As an apparatus for removing magnetic bodies from a fluid, for example, the one shown in Patent Document 1 below has been proposed.

[0004] The device shown in Patent Document 1 is configured so that the fluid flowing in from the inlet is dispersed and its flow rate is weakened as it passes through a filter cartridge 14 provided in a first chamber 11. A magnet 18 held by a C-shaped holding member 21 is provided on the outer wall of a second chamber 15 provided below the first chamber 11, and this magnet 18 attracts magnetic bodies in the fluid. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] US Patent Application Publication No. 2014 / 0367340 Summary of the Invention [Problem to be solved by the invention]

[0006] In the configuration disclosed in Patent Document 1, the magnet is removed from the second chamber together with the holding member, and the magnetic material attracted by the magnet is dropped to the bottom of the second chamber and collected. After the collection operation, the magnet held by the holding member is attached to the second chamber again. At this time, there is a risk of losing the removed holding member with magnet, so it is necessary to take measures to prevent loss, such as attaching a string to the holding member with magnet and then fixing it to the second chamber, which may make the work complicated.

[0007] Therefore, an object of the present invention is to easily perform the recovery work of magnetic bodies. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides: A main body portion through which a fluid containing a magnetic material flows; A magnet provided outside the main body; a magnet holder that swings the magnet around a shaft provided on the main body between an attracted state in which the magnet is close to the outer surface of the main body and a released state in which the magnet is separated from the outer surface of the main body; The magnetic material recovery mechanism is configured to recover the magnetic material by setting the magnet in the attracted state and then detaching the magnetic material from the inner surface by setting the magnet in the detached state.

[0009] In this way, the magnetic body can be switched between its attracted and detached states simply by swinging the magnet holder around the shaft, eliminating the risk of losing parts and simplifying the process of recovering the magnetic body.

[0010] In the above configuration, The shaft body is arranged horizontally and a through hole through which the shaft body is inserted is formed in the magnet holder, and the magnet holder can be configured to oscillate between the adsorbed state and the detached state.

[0011] In this way, the magnet holder rocking mechanism can be configured with a simple structure, which is also advantageous in terms of cost.

[0012] In all of the above configurations: A recess may be formed on the outer surface of the main body to which the magnet is adjacent in the adsorbed state, and the edge of the recess may form a step with which the magnet or the magnet holder comes into contact when the magnet holder oscillates.

[0013] In this way, the magnet holder is temporarily fixed by contact between the step portion and the magnet or magnet holder, and the magnet holder in the attracted state can be prevented from inadvertently swinging toward the detached state.

[0014] In all of the above configurations: A resistance portion may be formed on a side surface of the main body portion to come into contact with the magnet holder in the attracted state and provide a swing resistance to the magnet holder.

[0015] In this way, the magnet holder is temporarily fixed by contact between the resistance portion and the magnet holder, and the magnet holder in the attracted state can be prevented from inadvertently swinging toward the detached state.

[0016] In all of the above configurations: The main body may be provided with a magnetic member that is attracted to the magnet in the attracted state and applies a swing resistance to the magnet holder.

[0017] In this way, the magnet holder is temporarily fixed by the attraction force between the magnet and the magnetic member, and the magnet holder in the attracted state can be prevented from inadvertently swinging in the removal direction.

[0018] In the configuration in which the insertion hole is formed, The main body is formed with an abutment portion that abuts against the outer surface of the lower end of the magnet holder in the adsorbed state to prevent the magnet holder from swinging, and the insertion hole is a long hole that extends in the vertical direction when the magnet holder is in the adsorbed state, and the shaft body can be configured to be located at the vertical middle part of the insertion hole in the adsorbed state, to be located at the lower end of the insertion hole when the magnet holder is slid upward to release the abutment between the abutment portion and the magnet holder, and to be located at the upper end of the insertion hole when the magnet is released.

[0019] In this way, the locked state of the magnet holder by the abutment portion can be smoothly released, and by positioning the shaft at the upper end of the long hole, the magnet held by the magnet holder can be moved as far away from the main body portion as possible, weakening the magnetic force acting on the main body portion, and allowing the attracted magnetic body to quickly detach.

[0020] In addition, in a configuration in which the insertion hole is an elongated hole, A locking hole may be provided at a lower end of the insertion hole, the locking hole extending toward the main body in the adsorbed state.

[0021] In this way, the shaft can be temporarily locked by the locking hole to maintain the unlocked state of the magnet holder, so that the magnet holder can be smoothly swung after the locking is released.

[0022] In all of the above configurations: A mortar-shaped collection cone for collecting magnetic material that has detached from the inner surface of the main body in the detached state is provided inside the main body, and a drop-promoting section is formed with a partially steep downward inclination angle corresponding to the circumferential position of the collection cone to which the magnet is adjacent in the adsorbed state.

[0023] In this way, it is possible to prevent as much as possible the magnetic material from remaining on the upper surface of the collection cone due to the weak magnetic force acting on the main body in the detached state. Effect of the Invention

[0024] According to the above-described configuration of the present invention, the magnetic body can be easily recovered. [Brief description of the drawings]

[0025] [Figure 1] FIG. 1 is a cross-sectional view showing an example of a foreign matter removal device that employs a magnetic body recovery mechanism (first embodiment) according to the present invention. [Diagram 2] FIG. 2 is a perspective view of the foreign matter removal device shown in FIG. [Diagram 3] FIG. 3 is a perspective view showing a magnet holder of the magnetic material recovery mechanism shown in FIG. [Figure 4] 3 is a front view showing the operation of the magnetic body recovery mechanism shown in FIG. 2, in which (a) is a state in which the magnet holder is close to the main body part (attached state), (b) is a state in which the magnet holder is being rotated, and (c) is a state in which the magnet holder is completely separated from the main body part (detached state). [Diagram 5] FIG. 1 is a perspective view showing an example of a foreign matter removal device that employs a magnetic body recovery mechanism (second embodiment) according to the present invention; [Figure 6] FIG. 6 is a perspective view showing a magnet holder of the magnetic material recovery mechanism shown in FIG. [Figure 7] 6 is a front view showing the operation of the magnetic body recovery mechanism shown in FIG. 5, in which (a) is a state in which the magnet holder is close to the main body part (attached state), (b) is a state in which the magnet holder is being rotated, and (c) is a state in which the magnet holder is completely separated from the main body part (detached state). [Figure 8] FIG. 11 is a perspective view showing an example of a foreign matter removal device that employs a magnetic body recovery mechanism (third embodiment) according to the present invention; [Figure 9] FIG. 9 is a perspective view showing a magnet holder of the magnetic material recovery mechanism shown in FIG. 8; [Figure 10] 9 is a front view showing the operation of the magnetic material recovery mechanism shown in FIG. 8, in which (a) is a state in which the magnet holder is close to the main body part (attached state), (b) is a state in which the magnet holder is slid upward, (c) is a state in which the magnet holder is being rotated, (d) is a state in which the magnet holder is slid toward the front, and (e) is a state in which the magnet holder is completely separated from the main body part (detached state). [Figure 11] 1A and 1B are cross-sectional views showing a foreign matter removal device employing a magnetic material recovery mechanism according to the present invention, in which FIG. 1A shows a first modified example of a collection cone, and FIG. 1B shows a second modified example of a collection cone. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] A first embodiment of a magnetic material recovery mechanism 1 according to the present invention will be described with reference to the drawings. As shown in Fig. 1 and Fig. 2, the magnetic material recovery mechanism 1 can be used in a foreign material removal device 2 that removes foreign material (magnetic material, non-magnetic material) from a fluid. The magnetic material recovery mechanism 1 mainly includes a main body 3 through which a fluid containing foreign material flows, a magnet 4 provided on the outside of the main body 3, and a magnet holder 6 that swings the magnet 4 around a shaft 5 provided on the main body 3 between an attracted state in which the magnet 4 is close to the outer surface of the main body 3 and a released state in which the magnet 4 is separated from the outer surface of the main body 3.

[0027] The main body 3 is a main component of the foreign matter removal device 2, and is a hollow cylindrical resin member. The main body 3 according to this embodiment is formed by vertically joining an upper main body 3a and a lower main body 3b. An inlet pipe 7 through which a fluid containing foreign matter (e.g., hot water) flows in, and an outlet pipe 8 through which the fluid from which the foreign matter has been removed flows out are connected to the upper part of the main body 3. A deflection member 9 that deflects the direction of the fluid that flows in from the inlet pipe 7 downward is provided extending downward from the upper end of the main body 3.

[0028] A cone-shaped collecting cone 10 is provided near the center of the main body 3 in the vertical direction to collect foreign matter (both magnetic and non-magnetic matter) from the fluid. The collecting cone 10 has a circular through hole 11 at its center and a rectangular through hole 12 at a position offset from the center in the radial direction (upstream side). The upper main body 3a and the lower main body 3b are provided with a plurality of ribs 13 and 14 extending in the vertical direction, and these ribs 13 and 14 determine the height of the collecting cone 10 within the main body 3. A collecting section 15 is provided below the collecting cone 10 to temporarily store the collected foreign matter. The collecting section 15 is provided with a cock valve 16 and a plug 17 that closes the downward opening of the cock valve 16.

[0029] A filter 18 is provided in the flow path from the inlet pipe 7 to the outlet pipe 8. Foreign matter (both magnetic and non-magnetic) of a predetermined size or larger is captured by this filter 18. The lower end of the filter 18 is inserted into a rectangular through-hole 12 formed in the collection cone 10.

[0030] The magnet 4 has a flat, approximately rectangular parallelepiped shape and is held by the magnet holder 6 shown in FIG. 3. The magnet holder 6 is made of a magnetic material and has a base 20 on which a pair of flanges 19 are erected, an extension 21 extending from the flange 19 in the same direction as the extension of the base 20, a bent portion 22 bent inward from the end of the extension 21, and a holding piece 23 bent from the end of the bent portion 22 so as to follow one side and the top surface of the magnet 4. Each flange 19 has an insertion hole 24 through which the shaft 5 horizontally provided on the main body 3 is inserted. The magnet 4 is attracted to the multiple surfaces of the bent portion 22 and the holding piece 23 by its own magnetic force. Note that the "horizontal" of the shaft 5 here does not only mean completely horizontal, but also includes a slight inclination (for example, up to about 5 degrees) that does not cause any problems in the swinging of the magnet holder 6.

[0031] The portion of shaft body 5 that is inserted into insertion hole 24 is machined to have a D-shaped cross section. Furthermore, insertion hole 24 has a D-shape that corresponds to the cross-sectional shape of shaft body 5. This shaft body 5 is a shaft body with a handle provided with handle 25 for performing a swinging operation. Note that instead of holding handle 25 to perform the swinging operation, base 20 of magnet holder 6 can also be held to perform the swinging operation.

[0032] A flat recess 26 is formed on the outer surface of the main body 3, to which the magnet 4 approaches in an attracted state, so that in the attracted state, the surface of the magnet 4 and the surface of the recess 26 are in close contact. The upper edge of this recess 26 forms a step 27 that comes into contact with the magnet 4 or the magnet holder 6 when the magnet holder 6 swings upward, providing the magnet holder 6 with swing resistance.

[0033] A table 28 with a flat upper surface is provided on the outer surface of the main body 3, extending radially outward. The table 28 is fixed to the main body 3 by a fastener (hereinafter, the same reference numeral as the magnetic member 29) serving as a magnetic member 29. In the attracted state, the magnet holder 6 and the magnet 4 are placed on the upper surface of the table 28, and an attractive force is acting between the magnet 4 and the fastener 29. In this embodiment, a screw is used as the fastener 29, but a spring pin can also be used.

[0034] The operation of the foreign matter removal device 2 provided with the magnetic material recovery mechanism 1 according to the first embodiment will be described. In the normal use state of the foreign matter removal device 2, the magnetic material recovery mechanism 1 is in the adsorption state shown in FIG. 4(a). The fluid containing foreign matter (magnetic and non-magnetic bodies) that flows into the main body 3 from the inlet pipe 7 is deflected downward by the action of the deflection member 9 and passes through the filter 18 provided in the main body 3. At this time, foreign matter (both magnetic and non-magnetic bodies) of a predetermined size or larger is captured by the filter 18. The captured foreign matter is carried by the downward fluid that flows along the surface of the filter 18 without remaining on the surface of the filter 18, and falls into the collection unit 15 through the rectangular through-hole 12 formed in the collection cone 10.

[0035] On the other hand, the fluid containing small foreign matter that has passed through the filter 18 is deflected upward near the collection cone 10. At this time, foreign matter having a higher specific gravity than the fluid flows near the inner surface of the main body 3, and magnetic material in the foreign matter is attracted to the inner surface of the main body 3 by the attraction force of the magnet 4 provided in the magnetic material recovery mechanism 1. The fluid from which the magnetic material has been removed flows out of the main body 3 through the outflow pipe 8.

[0036] In maintenance of the foreign matter removal device 2, the flow of fluid is temporarily stopped and then the magnetic material recovery mechanism 1 is switched from the attracted state (see FIG. 4(a)) to the detached state (see FIG. 4(c)). In the normal use state of this foreign matter removal device 2, the magnetic material recovery mechanism 1 is in an attracted state in which the magnet 4 and magnet holder 6 are supported by the table 28, as shown in FIG. 4(a). At this time, an attractive force acts between the magnet 4 and the fastener 29, and a clicking sensation is generated in association with the attraction.

[0037] Here, when the handle 25 provided on the shaft 5 is pulled toward the front against the attraction force between the magnet 4 and the fastener 29 and the swing resistance by the step 27, the contact between the magnet 4 or the magnet holder 6 and the step 27 is released, and the magnet holder 6 starts to swing upward around the shaft 5, as shown in FIG. 4(b). Furthermore, as shown in FIG. 4(c), the magnet holder 6 is swung to a position where a part of the magnet holder 6 (near the base 20 in this embodiment) hits the main body 3 and is stably stationary, and the magnet 4 is sufficiently separated from the outer surface of the main body 3 to be in a detached state. When the magnet 4 is in the detached state, the attraction force of the magnet 4 to the magnetic material attracted to the inner surface of the main body 3 weakens, so that the magnetic material detaches from the inner surface and falls into the collection section 15 through the circular through hole 11 formed in the center of the collection cone 10 (see FIG. 1).

[0038] The foreign matter (magnetic and non-magnetic matter) that falls into the collection section 15 is discharged outside the foreign matter removal device 2 together with the fluid by removing the plug 17 provided on the cock valve 16 and then opening the cock valve 16.

[0039] The magnetic material recovery mechanism 1 according to the first embodiment can switch between the attached and detached states of the magnet 4 simply by swinging the magnet holder 6 around the shaft 5 horizontally installed in the main body 3, so there is no risk of losing any parts and the magnetic material recovery work can be easily performed. In addition, the swing mechanism for the magnet holder 6 can be configured with a simple structure, which is also advantageous in terms of cost.

[0040] Furthermore, the magnetic body recovery mechanism 1 according to the first embodiment is configured to apply an attractive force between the magnet 4 and the fastener 29, and to provide a rocking resistance to the magnet holder 6 by forming a step portion 27 on the upper edge of the recess 26 and temporarily fixing it, so that it is possible to prevent the attracted state from being released inadvertently. Also, since the state (attracted state) in which the magnet holder 6 (magnet 4) is placed on the table 28 is the stable state of this magnet holder 6, even if vibrations act on the magnet holder 6 during transportation or the like and cause it to float up, it can quickly return to this stable state.

[0041] Furthermore, in the magnetic body recovery mechanism 1 of the first embodiment, the magnet 4 is firmly adsorbed by multiple surfaces of the extension portion 22 and the retaining piece 23 of the magnet holder 6, so that when switching from an adsorbed state to a detached state, the adhesive force between the magnetic body adsorbed to the inner surface of the main body portion 3 and the magnet 4 can prevent the magnet 4 from shifting from its predetermined position within the magnet holder 6.

[0042] Furthermore, in the magnetic body recovery mechanism 1 of the first embodiment, the insertion portion into the insertion hole 24 of the shaft body 5 is machined to have a D-shaped cross section, and the insertion hole 24 is made to have a D-shape that corresponds to the cross-sectional shape of the shaft body 5, so that oscillation can be transmitted reliably between the shaft body 5 and the magnet holder 6.

[0043] A foreign matter removal device 2 employing a magnetic body recovery mechanism 1 (second embodiment) according to the present invention is shown in Fig. 5. The magnetic body recovery mechanism 1 according to the second embodiment has a basic configuration in common with the magnetic body recovery mechanism 1 according to the first embodiment, but is different in the shape of the magnet holder 6 and the swing direction of the magnet holder 6.

[0044] 6, the magnet holder 6 has a base 20 with a pair of flanges 19 erected thereon, extensions 21 extending from both sides of the base 20 at a bend angle of 45 degrees, a bent portion 22 bent slightly further inward from the end of the extension 21, and a retaining piece 23 bent from the end of the bent portion 22 to follow one side and the top surface of the magnet 4. Each flange 19 has an insertion hole 24 formed therein through which the shaft 5 provided horizontally in the main body 3 is inserted.

[0045] The portion of the shaft 5 that passes through the insertion hole 24 is machined to have a D-shaped cross section. The insertion hole 24 is also D-shaped to correspond to the cross-sectional shape of the shaft 5. The shaft 5 is provided with a handle 25 for performing a swinging operation. The outer surface of the main body 3 is formed with a planar recess 26 to which the magnet 4 approaches in an attracted state, so that the surface of the magnet 4 and the surface of the recess 26 are in close contact in the attracted state. The main body 3 is formed with a resistance portion 30 (snap fit) that abuts against the outer surface of the lower end of the base 20 of the magnet holder 6 in the attracted state to provide swing resistance to the magnet holder 6.

[0046] In maintenance of the foreign matter removal device 2, the flow of fluid is temporarily stopped and then the magnetic material recovery mechanism 1 is switched from the attracted state (see FIG. 7(a)) to the detached state (see FIG. 7(c)). In the attracted state, as shown in FIG. 7(a), the outer surface of the lower end of the base 20 of the magnet holder 6 abuts against the resistance portion 30 formed on the side of the main body 3, and a rocking resistance is applied to the magnet holder 6.

[0047] Here, when the handle 25 provided on the shaft 5 is pulled forward to swing the magnet holder 6 against the swing resistance of the resistance part 30, the contact between the magnet holder 6 and the resistance part 30 is released, and the magnet holder 6 starts to swing around the shaft 5, as shown in FIG. 7(b). The magnet holder 6 is further swung until a part of the magnet holder 6 (near the base part 20 in this embodiment) hits the main body part 3, as shown in FIG. 7(c), and the magnet 4 is sufficiently separated from the outer surface of the main body part 3 and is in a detached state. When the magnet 4 is in the detached state, the attraction force of the magnet 4 to the magnetic material attracted to the inner surface of the main body part 3 weakens, so that the magnetic material detaches from the inner surface and falls into the collection part 15 through the circular through hole 11 formed in the center of the collection cone 10 (see FIG. 1).

[0048] As with the magnetic material recovery mechanism 1 according to the first embodiment, the magnetic material recovery mechanism 1 according to the second embodiment can switch between the attached state and the detached state of the magnet 4 simply by swinging the magnet holder 6 around the shaft 5 provided horizontally on the main body 3, so that the magnetic material recovery work can be easily performed without the risk of losing any parts. In addition, since the swing mechanism for the magnet holder 6 can be configured with a simple structure, there is also an advantage in terms of cost.

[0049] In addition, the magnetic body recovery mechanism 1 of the second embodiment is configured so that a resistance portion 30 is formed on the side of the main body portion 3 to provide a rocking resistance to the magnet holder 6. This creates a clicking sensation during the rocking operation, allowing the user to easily sense the switch between the adsorption state and the detachment state, and also preventing the adsorption state from being inadvertently released.

[0050] In addition, in the magnetic body recovery mechanism 1 of the second embodiment, the insertion portion into the insertion hole 24 of the shaft body 5 is machined to have a D-shaped cross section, and the insertion hole 24 is made to have a D-shape that corresponds to the cross-sectional shape of the shaft body 5, so that oscillation can be transmitted reliably between the shaft body 5 and the magnet holder 6.

[0051] In addition, in the magnetic body recovery mechanism 1 of the second embodiment, the upper surface of the magnet 4 is adsorbed to the retaining piece 23, so that when switching from the adsorbed state to the detached state, the adhesive force between the magnetic body adsorbed to the inner surface of the main body 3 and the magnet 4 can prevent the magnet 4 from coming off the magnet holder 6 and being left behind in the adsorbed state position.

[0052] In addition, since the retaining piece 23 is formed so as to extend from the end of the extension portion 21 of the magnet holder 6 along the upper surface of the magnet 4, the retaining piece 23 is positioned between the magnet 4 and the main body 3 in the detached state, and the attractive force of the magnet 4 is shielded by the retaining piece 23. This further weakens the attractive force of the magnet 4 on the magnetic body attracted to the inner surface of the main body 3, allowing the magnetic body to be detached more smoothly.

[0053] A foreign matter removal device 2 employing a magnetic body recovery mechanism 1 (third embodiment) according to the present invention is shown in Fig. 8. The magnetic body recovery mechanism 1 according to the third embodiment has a basic configuration in common with the magnetic body recovery mechanism 1 according to the first embodiment, etc., but the shapes of the magnet holder 6, etc. are different.

[0054] As shown in Fig. 9, the magnet holder 6 has a base 20 on which a pair of flanges 19 are erected, extensions 21 extending from both sides of the base 20 at a bending angle of 45 degrees, and a retaining piece 23 bent from the end of the extension 21 to follow one side and the top surface of the magnet 4. Each flange 19 has an insertion hole 24 through which the shaft 5 horizontally provided in the main body 3 is inserted. The insertion hole 24 is an elongated hole that extends in the vertical direction when the magnet 4 held by the magnet holder 6 is in an attracted state. A locking hole 31 is extended from the lower end of the insertion hole 24 and extends toward the main body 3 in this attracted state.

[0055] The shaft 5 inserted into the insertion hole 24 of the magnet holder 6 is provided horizontally on the side surface of the main body 3. In addition, an abutment portion 32 is formed on the outer surface of the main body 3, which abuts against the outer surface of the lower end of the base 20 of the magnet holder 6 in the attracted state to prevent the magnet holder 6 from swinging. A slit is formed between the abutment portion 32 and the outer surface of the main body 3, into which the base 20 of the magnet holder 6 can be inserted. In addition, a planar recess 26 is formed on the outer surface of the main body 3, to which the magnet 4 approaches in the attracted state, so that the surface of the magnet 4 and the surface of the recess 26 are in close contact with each other in the attracted state.

[0056] In maintenance of the foreign matter removal device 2, the flow of fluid is temporarily stopped and then the magnetic material recovery mechanism 1 is switched from the adsorbed state (see FIG. 10(a)) to the detached state (see FIG. 10(e)). In the adsorbed state, as shown in FIG. 10(a), the outer surface of the lower end of the base 20 of the magnet holder 6 abuts against an abutment portion 32 formed on the side of the main body 3, preventing the magnet holder 6 from swinging. At this time, the shaft 5 is located in the vertical middle of the insertion hole 24.

[0057] Here, as shown in FIG. 10(b), the magnet holder 6 is slid upward to release the abutment between the abutment portion 32 and the magnet holder 6. At this time, the shaft body 5 is positioned in the locking hole 31 extending from the lower end of the insertion hole 24. Furthermore, as shown in FIG. 10(c), the magnet holder 6 is swung around the shaft body 5 while the shaft body 5 is positioned in the locking hole 31. After the magnet holder 6 has been swung to a certain extent, the magnet holder 6 is slid obliquely downward to avoid contact between the magnet holder 6 and the outflow pipe 8, as shown in FIG. 10(d). At this time, the shaft body 5 moves to the upper end of the insertion hole 24.

[0058] 10(e), the magnet 4 is placed in a detached state, sufficiently separated from the outer surface of the main body 3, while the shaft 5 is still positioned at the upper end of the insertion hole 24. When the magnet 4 is placed in the detached state, the force of attraction of the magnet 4 to the magnetic material attracted to the inner surface of the main body 3 is weakened, so that the magnetic material detaches from the inner surface and falls into the collection section 15 through the circular through hole 11 formed in the center of the collection cone 10. The distance between the magnet 4 and the main body 3 in the detached state can be further increased by lengthening the length of the insertion hole 24. By increasing the distance, the force of attraction of the magnet 4 acting on the magnetic material attracted to the inner surface of the main body 3 in the detached state is further weakened, and the detachment can be performed more smoothly.

[0059] The magnetic material recovery mechanism 1 according to the third embodiment can switch between the attracted and released states of the magnet 4 simply by swinging the magnet holder 6 around the shaft 5 horizontally installed in the main body 3, so there is no risk of losing any parts and the magnetic material recovery work can be easily performed. In addition, the swing mechanism for the magnet holder 6 can be configured with a simple structure, which is also advantageous in terms of cost.

[0060] Furthermore, in the magnetic body recovery mechanism 1 according to the third embodiment, the locking hole 31 is extended from the insertion hole 24, and the shaft body 5 is locked in this locking hole 31, so that when the magnet holder 6 is slid upward to release the contact between the contact part 32 and the magnet holder 6, the released state is maintained. Therefore, the subsequent swinging operation of the magnet holder 6 can be performed smoothly.

[0061] Furthermore, the magnetic body recovery mechanism 1 according to the third embodiment has a retaining piece 23 bent from the end of the extension portion 21 of the magnet holder 6 to fit along the upper surface of the magnet 4, so that in the detached state the retaining piece 23 is positioned between the magnet 4 and the main body 3, and the attractive force of the magnet 4 is blocked by the retaining piece 23. This further weakens the attractive force of the magnet 4 on the magnetic body attracted to the inner surface of the main body 3, allowing for smoother detachment. The arrangement of the retaining piece 23 can also be changed as appropriate.

[0062] In the foreign matter removal device 2 according to each of the above embodiments, the inclination angle of the upper surface of the collection cone 10 is constant regardless of the position on the inside surface, but as shown in Fig. 11(a), a drop promotion section 33 with a steep downward inclination angle can be formed at the upper end of the collection cone 10 where the detached magnetic body directly hits when in the detached state. Also, as shown in Fig. 11(b), the drop promotion section 33 can be formed by eccentrically displacing the circular through hole 11 formed in the collection cone 10 toward the magnet holder 6 side (the magnet 4 side) and making the inclination angle of the magnet holder 6 side (the magnet 4 side) steeper.

[0063] By forming the drop promotion portion 33 in this manner, magnetic material that has detached from the inner surface of the main body portion 3 in the detached state is prevented from remaining near the upper end of the upper surface of the collection cone 10 due to the weak adhesive force acting from the magnet 4, thereby improving the recovery efficiency of the magnetic material.

[0064] The embodiments disclosed herein are illustrative in all respects and should not be considered as limiting. Therefore, the scope of the present invention is defined by the claims, not by the above description, and is intended to include the meaning equivalent to the claims and all modifications.

[0065] For example, the magnetic material recovery mechanism 1 described above is configured to swing the magnet holder 6 around the shaft 5 provided horizontally on the main body 3, but it may also be configured to swing the magnet holder 6 around the shaft 5 provided vertically on the main body 3. Also, in each of the above embodiments, it is possible to realize a maintenance-free system that does not require manual work by automatically pausing the fluid flow in the foreign matter removal device 2 with a timer or the like and then rotating the magnet holder 6 with a motor. [Explanation of symbols]

[0066] 1 Magnetic material recovery mechanism 2 Foreign matter removal device 3 Main body 3a Upper body part 3b Lower body part 4. Magnets 5-axis body 6 Magnet holder 7 Inflow pipe 8 Outflow pipe 9 Deflection member 10 Collection cone 11 (Circular) through hole 12 (Rectangular) through hole 13, 14 Ribs 15 Collection section 16 Cock valve 17 Stopper 18 Filters 19 Flange 20 base 21 Extension section 22 Bend 23 Holding piece 24 Insertion hole 25 Handle 26 Recess 27 Step 28 Table 29 Magnetic components (fasteners) 30 Resistor section 31 Locking hole 32 Contact part 33 Fall Promotion Section

Claims

1. A main body (3) through which a fluid containing a magnetic material flows; A magnet (4) provided outside the main body portion (3); a magnet holder (6) that swings the magnet (4) around a shaft (5) provided on the main body (3) between an attracted state in which the magnet (4) is close to the outer surface of the main body (3) and a detached state in which the magnet (4) is separated from the outer surface of the main body (3); and and a magnetic body attracted to the inner surface of the main body portion (3) by bringing the magnet (4) into the attracted state, and a magnetic body is recovered by detaching the magnetic body from the inner surface by bringing the magnet (4) into the detached state, a swing direction in an initial swing stage when swinging the magnet (4) from the attracted state to the released state is a direction perpendicular to a vertical line drawn on the attracting surface of the magnet (4) of the main body portion (3); The shaft body (5) is arranged horizontally, and a through hole (24) is formed in the magnet holder (6) through which the shaft body (5) is inserted, and the magnetic body recovery mechanism is configured so that the magnet holder (6) oscillates between the adsorption state and the detachment state.

2. A magnetic material recovery mechanism as described in claim 1, wherein a recess (26) is formed on the outer surface of the main body portion (3) to which the magnet (4) is adjacent in the adsorbed state, and the edge of the recess (26) forms a step portion (27) with which the magnet (4) or the magnet holder (6) comes into contact when the magnet holder (6) oscillates.

3. The magnetic body recovery mechanism according to claim 1, wherein a resistance portion (30) is formed on a side of the main body portion (3) so as to abut against the magnet holder (6) in the adsorbed state and provide a swinging resistance to the magnet holder (6).

4. 2. The magnetic body recovery mechanism according to claim 1, wherein the main body portion (3) is provided with a magnetic member (29) that is attracted to the magnet (4) in the attracted state and provides a swinging resistance to the magnet holder (6).

5. A main body (3) through which a fluid containing a magnetic material flows; A magnet (4) provided outside the main body portion (3); a magnet holder (6) that swings the magnet (4) around a shaft (5) provided on the main body (3) between an attracted state in which the magnet (4) is close to the outer surface of the main body (3) and a detached state in which the magnet (4) is separated from the outer surface of the main body (3); and and a magnetic body attracted to the inner surface of the main body portion (3) by bringing the magnet (4) into the attracted state, and a magnetic body is recovered by detaching the magnetic body from the inner surface by bringing the magnet (4) into the detached state, the shaft body (5) is provided horizontally, and an insertion hole (24) through which the shaft body (5) is inserted is formed in the magnet holder (6), and the magnet holder (6) is configured to swing between the attracted state and the released state; The main body (3) is formed with an abutment portion (32) that abuts against the outer surface of the lower end of the magnet holder (6) in the adsorbed state to prevent the magnet holder (6) from swinging, the insertion hole (24) is a long hole that extends in the vertical direction when the magnet holder (6) is in the adsorbed state, and the shaft (5) is located at the vertical middle part of the insertion hole (24) in the adsorbed state, is located at the lower end of the insertion hole (24) when the magnet holder (6) is slid upward to release the abutment between the abutment portion (32) and the magnet holder (6), and is located at the upper end of the insertion hole (24) in the detached state of the magnet (4). This magnetic body recovery mechanism is configured as follows.

6. 6. The magnetic body recovery mechanism according to claim 5, wherein a locking hole (31) is provided at a lower end of the insertion hole (24) so ​​as to extend toward the main body portion (3) in the attracted state.

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