JP7616701B2 - Magnetic material recovery mechanism - Google Patents

Description

This invention relates to a magnetic material recovery mechanism used in devices such as foreign matter removal devices that remove magnetic material from fluids.

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 up 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.

As an example of a device for removing magnetic material from a fluid, the device shown in Patent Document 1 below has been proposed.

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

US Patent Application Publication No. 2014/0367340

In the configuration described 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 falls to the bottom of the second chamber and is collected. After the collection operation, the magnet held by the holding member is attached back to the second chamber. At this time, there is a risk that the removed holding member with magnet will be lost, so measures to prevent loss, such as attaching a string to the holding member with magnet and then fixing it to the second chamber, are required, which can be cumbersome in terms of work.

Therefore, the objective of this invention is to simplify the process of recovering magnetic materials.

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.

In this way, the magnetic body can be switched between its attracted and detached states simply by rotating the magnet holder around the shaft, eliminating the risk of losing parts and making it easy to recover the magnetic body.

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.

In this way, the magnet holder's rocking mechanism can be constructed with a simple structure, which also has cost benefits.

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.

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

In all of the above configurations:
A resistance portion may be formed on a side surface of the main body portion, the resistance portion being in contact with the magnet holder in the attracted state to provide a swing resistance to the magnet holder.

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.

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.

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 detaching direction.

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.

In this way, the locked state of the magnet holder by the abutment part 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 as possible, weakening the magnetic force acting on the main body, and allowing the attracted magnetic body to be quickly released.

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.

In this way, the shaft can be temporarily locked by the locking hole to keep the magnet holder unlocked, allowing the magnet holder to be smoothly swung after being unlocked.

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.

In this way, the weak magnetic force acting on the main body in the detached state can be used to prevent magnetic material from remaining on the top surface of the collection cone.

The above-mentioned configuration of the present invention makes it easy to collect magnetic materials.

FIG. 1 is a cross-sectional view showing an example of a foreign matter removal device employing a magnetic body recovery mechanism (first embodiment) according to the present invention; FIG. 2 is a perspective view of the foreign matter removal device shown in FIG. FIG. 3 is a perspective view showing a magnet holder of the magnetic body recovery mechanism shown in FIG. 3A 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). 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; FIG. 6 is a perspective view showing a magnet holder of the magnetic body recovery mechanism shown in FIG. 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). 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; FIG. 9 is a perspective view showing a magnet holder of the magnetic body recovery mechanism shown in FIG. 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 forward, and (e) is a state in which the magnet holder is completely separated from the main body part (detached state). 1A and 1B are cross-sectional views showing a foreign matter removal device employing a magnetic body recovery mechanism according to the present invention, in which FIG. 1A is a first modified example of a collection cone, and FIG. 1B is a second modified example of a collection cone.

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 Figs. 1 and 2, this 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 main components of this magnetic material recovery mechanism 1 are 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 causes the magnet 4 to swing 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.

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 constructed 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. In addition, a deflection member 9 that deflects the direction of the fluid flowing in from the inlet pipe 7 downward is provided extending downward from the upper end of the main body 3.

A cone-shaped collection cone 10 is provided near the vertical center of the main body 3 to collect foreign matter (both magnetic and non-magnetic) from the fluid. The collection 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). The upper main body 3a and the lower main body 3b are provided with multiple ribs 13 and 14 extending in the vertical direction, and these ribs 13 and 14 determine the height of the collection cone 10 within the main body 3. A collection section 15 is provided below the collection cone 10 to temporarily store the collected foreign matter. The collection section 15 is provided with a cock valve 16 and a plug 17 that closes the downward opening of the cock valve 16.

A filter 18 is provided in the flow path from the inlet pipe 7 to the outlet pipe 8. This filter 18 captures foreign matter (both magnetic and non-magnetic) of a certain size or larger. The lower end of the filter 18 is inserted into a rectangular through hole 12 formed in the collection cone 10.

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 direction 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 in 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.

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

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 the surface of the magnet 4 and the surface of the recess 26 are in close contact in the attracted state. The upper edge of this recess 26 is a step 27 that comes into contact with the magnet 4 or the magnet holder 6 when the magnet holder 6 swings upward, providing swing resistance to the magnet holder 6.

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 serving as a magnetic member 29 (hereinafter, the same reference numeral as the magnetic member 29 is used). In the attracted state, the magnet holder 6 and 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.

The operation of the foreign matter removal device 2 equipped with the magnetic material recovery mechanism 1 according to the first embodiment will be described. In the normal use state of this 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) 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) of a predetermined size or larger is captured by the filter 18. The captured foreign matter is carried by the downward fluid flowing along the surface of the filter 18 without remaining on the surface of the filter 18, and falls into the collection section 15 through the rectangular through-hole 12 formed in the collection cone 10.

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 with 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.

During maintenance of the foreign matter removal device 2, the flow of fluid is temporarily stopped and the magnetic material recovery mechanism 1 is switched from the adsorption 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 adsorption 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 adsorption force acts between the magnet 4 and the fastener 29, and a clicking sensation is felt when the magnets are adsorbed.

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 and is in a detached state. When the magnet 4 is in the detached state, the attraction force from 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).

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

The magnetic material recovery mechanism 1 according to the first embodiment can switch between the adsorption and release states of the magnet 4 simply by swinging the magnet holder 6 around the shaft 5 arranged horizontally on 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 also has the advantage in terms of cost.

In addition, the magnetic material recovery mechanism 1 according to the first embodiment is configured to apply an adhesive 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 adhesive state from being released inadvertently. Also, since the state (adhesive 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, etc., and the magnet holder 6 tries to float up, it can quickly return to this stable state.

In addition, the magnetic material recovery mechanism 1 according to the first embodiment firmly attracts the magnet 4 to multiple surfaces of the extension portion 22 and the retaining piece 23 of the magnet holder 6, so that when switching from an attracted state to a detached state, the magnetic material attracted to the inner surface of the main body portion 3 and the magnet 4 can be prevented from shifting from its designated position within the magnet holder 6 due to the attraction force between the magnet 4 and the magnetic material.

In addition, in the magnetic body recovery mechanism 1 according to the first embodiment, the insertion portion of the shaft body 5 into the insertion hole 24 is machined to have a D-shaped cross section, and the insertion hole 24 is made D-shaped to match the cross-sectional shape of the shaft body 5, so that the transmission of oscillation between the shaft body 5 and the magnet holder 6 can be ensured.

Figure 5 shows a foreign matter removal device 2 that employs a magnetic material recovery mechanism 1 (second embodiment) according to the present invention. The magnetic material recovery mechanism 1 according to the second embodiment has a basic configuration in common with the magnetic material recovery mechanism 1 according to the first embodiment, but differs in the shape of the magnet holder 6 and the swing direction of the magnet holder 6.

As shown in Figure 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 45 degree bend angle, 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 fit along one side and the top surface of the magnet 4. Each flange 19 has an insertion hole 24 through which the shaft 5 horizontally installed in the main body 3 is inserted.

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 match the cross-sectional shape of the shaft 5. The shaft 5 is provided with a handle 25 for performing the swinging operation. The outer surface of the main body 3 is formed with a planar recess 26 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 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 swinging resistance to the magnet holder 6.

During maintenance of the foreign matter removal device 2, the flow of fluid is temporarily stopped and the magnetic material recovery mechanism 1 is switched from the adsorption state (see FIG. 7(a)) to the detached state (see FIG. 7(c)). In the adsorption 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.

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

As with the magnetic material recovery mechanism 1 of the first embodiment, the magnetic material recovery mechanism 1 of the second embodiment can switch between the adsorption state and the release state of the magnet 4 simply by swinging the magnet holder 6 around the shaft 5 arranged horizontally on 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 also has an advantage in terms of cost.

In addition, the magnetic body recovery mechanism 1 according to the second embodiment is configured such 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, so that a clicking sensation occurs during the rocking operation, allowing the user to easily sense the switch between the adsorption state and the release state, and preventing the adsorption state from being inadvertently released.

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

In addition, in the magnetic material recovery mechanism 1 according to the second embodiment, the upper surface of the magnet 4 is attracted to the holding piece 23, so that when switching from the attracted state to the detached state, the magnetic material attracted to the inner surface of the main body 3 and the magnet 4 exert an attractive force on the magnet 4, preventing the magnet 4 from coming off the magnet holder 6 and being left behind in the attracted state position.

In addition, the retaining piece 23 is formed so as to run from the end of the extension portion 21 of the magnet holder 6 along the top 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 adhesive force of the magnet 4 is shielded by the retaining piece 23. This further weakens the adhesive force from the magnet 4 to the magnetic body attached to the inner surface of the main body 3, allowing the magnetic body to be detached more smoothly.

Figure 8 shows a foreign matter removal device 2 that employs a magnetic material recovery mechanism 1 (third embodiment) according to the present invention. The magnetic material recovery mechanism 1 according to the third embodiment has a basic configuration in common with the magnetic material recovery mechanism 1 according to the first embodiment, etc., but the shape of the magnet holder 6, etc. is different.

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 45 degree bend angle, and a retaining piece 23 bent from the end of the extension 21 to fit along one side and the top surface of the magnet 4. Each flange 19 has an insertion hole 24 through which the shaft 5 horizontally disposed in the main body 3 is inserted. This insertion hole 24 is a long hole that extends vertically when the magnet 4 held by the magnet holder 6 is in an adsorbed state. A locking hole 31 is extended from the lower end of the insertion hole 24, extending toward the main body 3 in this adsorbed state.

The shaft 5 inserted into the insertion hole 24 of the magnet holder 6 is provided horizontally on the side 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 is adjacent in the 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.

During maintenance of the foreign matter removal device 2, the flow of fluid is temporarily stopped and the magnetic material recovery mechanism 1 is switched from the adsorption state (see FIG. 10(a)) to the detached state (see FIG. 10(e)). In the adsorption 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 the 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.

Now, 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.

Furthermore, as shown in FIG. 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 separation 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 separation 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, allowing for smoother detachment.

The magnetic material recovery mechanism 1 according to the third embodiment can switch between the adsorption and release states of the magnet 4 simply by swinging the magnet holder 6 around the shaft 5 arranged horizontally on 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 also has a cost advantage.

In addition, the magnetic body recovery mechanism 1 according to the third embodiment has an engagement hole 31 extending from the insertion hole 24, and the shaft 5 is engaged with this engagement hole 31, so that when the magnet holder 6 is slid upward to release the abutment between the abutment portion 32 and the magnet holder 6, the released state is maintained. This allows the magnet holder 6 to be smoothly swung in the following operation.

In addition, the magnetic material recovery mechanism 1 according to the third embodiment has a retaining piece 23 that is bent from the end of the extension portion 21 of the magnet holder 6 to fit along the top surface of the magnet 4. In this way, the retaining piece 23 is positioned between the magnet 4 and the main body 3 in the detached state, and the adhesive force of the magnet 4 is shielded by the retaining piece 23. This further weakens the adhesive force from the magnet 4 to the magnetic material attracted to the inner surface of the main body 3, allowing for smoother detachment. The position of the retaining piece 23 can also be changed as appropriate.

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 material directly hits when in the detached state. Also, as shown in FIG. 11(b), the drop promotion section 33 can be formed by eccentrically moving the circular through hole 11 formed in the collection cone 10 toward the magnet holder 6 side (magnet 4 side) and making the inclination angle of the magnet holder 6 side (magnet 4 side) steeper.

By forming the drop promotion section 33 in this manner, the magnetic material that has detached from the inner surface of the main body section 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.

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

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 can also be configured to swing the magnet holder 6 around the shaft 5 provided vertically on the main body 3. In addition, 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.

1 Magnetic body recovery mechanism 2 Foreign body removal device 3 Main body 3a Upper main body 3b Lower main body 4 Magnet 5 Shaft 6 Magnet holder 7 Inlet pipe 8 Outlet pipe 9 Deflection member 10 Collection cone 11 (Circular) through hole 12 (Rectangular) through holes 13, 14 Rib 15 Collection section 16 Cock valve 17 Plug 18 Filter 19 Flange 20 Base 21 Extension section 22 Bent section 23 Holding piece 24 Insertion hole 25 Handle 26 Recess 27 Step section 28 Table 29 Magnetic member (fastener)
30 Resistance part 31 Locking hole 32 Contact part 33 Fall promotion part

Claims (6)

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 . 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. 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). 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). 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. 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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