JPH1068468A - Magnetic force utilizing ball cotter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bring close adhesion between a valve element and a valve seat for reliable operation at the time of interrupting a passage in the case where differential pressure in a fluid at both primary and secondary sides is small. SOLUTION: This magnetic force utilizing ball tap is installed in a passage 31 being small in differential pressure in a fluid at both primary and secondary sides 32 and 33, regulating a flow rate of this fluid, and this passage 31 is interrupted, while it is equipped with a ball-form valve element 2, a valve seat 9 making this valve element 2 come nearer and adhere closely, a valve body 13 being made up of such a material as being unaffected by magnetic force and provided with the valve element 2 and the valve seat 9 inside, and a valve element operating means 18 making the valve element 2 and the seat 9 approximate with each other and having them seated, respectively. Out of the valve element 2 and the valve seat 9, one side is built in with a permanent magnet 10, and the other is made up of a material to be attracted by this permanent magnet 10, and thereby they are stuck closely with each other by the magnetic force or the adherence is reinforced otherwise, whereby the passage 31 is interrupted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetically-powered ball stopper provided in the middle of a fluid flow path and used for both adjusting a flow rate and shutting off the flow path.

[0002]

2. Description of the Related Art Conventionally, ball plugs used for both adjusting a flow rate and shutting off a flow path are disclosed in, for example, JP-A-7-1033.
For example, there is one disclosed in Japanese Patent Publication No. 40 (1994). When the flow path is cut off, the operating rod (valve rod) is pushed down in a direction perpendicular to the flow direction of the fluid, and the valve body is positioned in the flow of the fluid.
The valve body is swung toward the secondary valve seat by the pressure difference between the primary side and the secondary side of the fluid, the valve body is pressed against the sealing surface of the valve seat, and the sealing surface pressure is increased to increase the secondary side. To shut off the flow to

[0003]

However, the present invention is not limited to this type of ball plug, and a ball plug of this type for pressing a ball-shaped valve body against a valve seat by a pressure difference between a primary side and a secondary side is one type.
If the pressure on the downstream side is low, even if the valve is seated and pressed against the valve seat, a sufficiently satisfactory sealing effect (adhesion between the valve and the valve seat) cannot be obtained due to the low sealing surface pressure. There was a risk that the flow of the fluid could not be blocked. Also, since it is difficult to manufacture the sealing surface of the valve body and the valve seat into a perfect contact curved surface, the pressure on the primary side is increased to some extent, and the contact portion of either the valve body or the valve seat is compared. The valve body and the valve seat are sufficiently adhered to each other by being formed of a material having elasticity and the other being formed of a relatively hard material.

Contrary to the above, when the pressure on the primary side is high, especially in a high pressure and large diameter size, the valve body is pressed against the sealing surface of the valve seat with a very large force, so that the valve body is in close contact with the sealing surface. Although the surface pressure becomes sufficiently high, on the other hand, when the operation (work) of separating the valve body from the valve seat to flow the fluid again is performed, the high primary side pressure becomes the back pressure and the force for separating is very large. Could be difficult.

[0005] A first object of the present invention is to provide a valve and a valve seat which are sufficiently in close contact with each other when the flow path is shut off when the fluid differential pressure between the primary side and the secondary side is small, and the operation is ensured. The object of the present invention is to provide a magnetically-powered ball stopper.

A second object of the present invention is to enable the valve body to be easily separated from the valve seat when the flow path is released when the fluid differential pressure between the primary side and the secondary side is large. Is to provide a reliable magnetic ball plug.

A third object of the present invention is to provide a magnetically-powered ball stopper which can reliably and reliably cut off and open the flow path by a simple structure and is economical in cost.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a magnetic force utilizing ball stopper according to the present invention is provided in a flow path in which a differential pressure between a primary side fluid and a secondary side fluid is small, and regulates the flow rate of the fluid. A valve formed of a material which is not affected by magnetic force and which has a ball-shaped valve element, a valve seat for bringing the valve element close to and in close contact with the valve element, and a valve seat and the valve seat provided therein. Body and
A valve body operating means for bringing the valve body close to and seating on the valve seat, wherein the valve body and the valve seat close each other or close together by magnetic force to shut off the flow path. is there. The fluid pressure on the primary side of the flow path is low and sufficient pressing force can be applied to the valve body by shutting off the flow path by the valve element and the valve seat being closely adhered to each other or strengthened by magnetic force. Therefore, even when the surface pressure of the sealing surface between the valve element and the valve seat cannot be secured, the magnetic force can enhance the close contact or the close contact with each other and cut off the flow path.

Further, in the above-mentioned ball tap using magnetic force, one of the valve body and the valve seat has a magnet, and the other is formed of a material which is attracted to the magnet. Since one of the valve body and the valve seat has a magnet and the other is formed of a material that is attracted to the magnet, the action of the magnetic force utilizing ball stopper can be reliably performed with a simple structure. And in the magnetic force utilizing ball stopper having the magnet, the magnet is an electromagnet. When the magnet is an electromagnet, the valve body and the valve seat can be easily brought into close contact with each other or separated by performing an electrical switching operation in addition to the function of the magnetic force-using ball stopper having the magnet.

[0010] The magnetic force-based ball plug of the present invention is provided in a flow path where the pressure difference between the primary side fluid and the secondary side fluid is large, adjusts the flow rate of the fluid, shuts off the flow path, and connects the electromagnet. A ball-shaped valve body having, a valve seat having a magnet to bring the valve body into close proximity and close contact, a valve body formed of a material that is not affected by magnetic force provided inside the valve body and the valve seat, A valve element operation that supports the valve element via a rigid valve rod and operates the valve rod to bring the valve element close to the valve seat or seat a predetermined portion of the valve element on the valve seat. Means, by energizing the electromagnet of the valve body, the valve body and the valve seat are repelled to each other by magnetic force to release the cutoff of the flow path. The valve element operating means of the magnetic force utilizing ball valve for repelling the valve element and the valve seat with each other by magnetic force supports the valve element with a rigid valve rod, and operates the valve rod to move the valve element to the valve seat. Can be close. Further, since a predetermined portion of the valve body can be seated on the valve seat, the electromagnet of the valve body is energized, and the valve body and the valve seat are magnetically made to have the same polarity. They can repel each other to release the cutoff of the flow path. Channel 1
Even if the pressure difference between the secondary side and the secondary side is large and the force for separating the valve body from the valve seat is very large, the valve body and the valve seat are repelled from each other by magnetic force and easily separated by performing an electrical switching operation. Can be done.

In addition, the present invention provides a ball plug utilizing magnetic force, which comprises a ball-shaped valve body made of a material adsorbed by a magnet, a valve seat for bringing the valve body into close contact with the valve body, the valve body and the valve seat. And a valve body formed of a material that is not affected by magnetic force provided therein, and by energizing an electromagnet provided in the valve body, adsorbs the valve body and releases the cutoff of the flow path, and releases the electromagnet. Valve operating means for shutting off the flow path by turning off the current. The valve body operating means of the magnetic force utilizing ball valve having an electromagnet in the valve body adsorbs the valve body seated on the valve seat and releases the cutoff of the flow path by energizing the electromagnet provided in the valve body. Further, when the electromagnet is de-energized, the valve body moves into the flow path, and is again seated on the valve seat by the pressure of the fluid, and shuts off the flow path.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a ball plug using magnetic force according to the present invention. still,
1 to 7, the same structures and working parts are denoted by the same reference numerals.

FIG. 1 is a longitudinal sectional view showing a first embodiment of a ball tap utilizing magnetic force according to the present invention. The magnetic force-based ball plug 1 according to the first embodiment is provided in a flow path 31 where the differential pressure between the fluid on the primary side 32 and the fluid on the secondary side 33 is small, and adjusts the flow rate of the fluid or shuts off the flow path 31. And a ball-shaped valve element 2
A valve seat 9 for bringing the valve body 2 close to and in close contact with the valve body; a valve body 13 formed of a material which is provided with the valve body 2 and the valve seat 9 therein and which is not affected by magnetic force; And valve body operating means 18 to be brought close to and seated on the seat 9. A sleeve 14a is connected to the primary side of the valve body 13, and a sleeve 14b is connected to the secondary side.

The valve seat 9 is provided on the inner side of the secondary sleeve 14b, and has a permanent magnet 10 built therein. Valve 2
Is made of a material 4 adsorbed to the permanent magnet 10, for example, a paramagnetic material or a ferromagnetic material. The valve body 2 and the valve seat 9 are tightly adhered to each other or strengthened by the magnetic force of the permanent magnet 10. The flow path 31 is shut off. Further, the valve body 2 is formed of a material 4 whose center side is attracted to the permanent magnet 10,
A sealing material 5 is lined outside this. The material of the sealing material 5 is a relatively soft and elastic material such as resin, synthetic rubber or metal.

The valve body 13 includes a T-shaped portion and a lid 13.
Since a permanent magnet is used for the valve seat 9 including a, a material that is not affected by the magnetic force of the permanent magnet, for example, polyethylene,
It is made of resin such as FRP, ceramic or non-magnetic material such as aluminum or brass, or hard magnetic material. The sleeve tubes 14a and 14b forming the flow path 31 are also made of a material that is not affected by the magnetic force of the permanent magnet 10 like the valve body 13.

The valve body operating means 18 fixes a flexible linear material 19 such as a string or a wire to a specific portion of the valve body 2, and attaches the flexible linear material 19 to the center of the lid 13a. Through the airtight. The position of the valve body 2 is adjusted by adjusting the movement of the linear member 19. In FIG. 1, a valve element position 2c indicated by a two-dot chain line is a position where the flexible linear member 19 is pulled and the valve element 2 is pulled up, and indicates a fully opened state of the ball stopper.

The material of the seal portion where the valve body 2 and the valve seat 9 contact each other is made of different materials. That is, if the surface of the ball-shaped valve body 2 is formed of a resilient material as in the present embodiment, the seat surface of the valve seat 9 is formed of a hard material. Conversely, if the surface of the ball-shaped valve body 2 is formed of a hard material such as metal, the material of the seat surface of the valve seat 9 in contact therewith is formed of a resilient and soft material.

The ball plug 1 utilizing magnetic force according to the first embodiment having the above structure operates as follows. That is, the valve element 2
Is formed of a material that is attracted to the permanent magnet 10, and the valve seat 9 has the permanent magnet 10, so that the fluid pressure on the primary side 32 of the flow path is low and sufficient pressing force can be applied to the valve body 2. However, even when the surface pressure of the sealing surface between the valve body 2 and the valve seat 9 cannot be secured, the magnetic force enhances the close contact or close contact with each other, and the simple structure can surely shut off the flow path 31. .

Further, the permanent magnet 10 is provided on the valve seat 9 in FIG. 1, but a permanent magnet is provided on the valve body 2 and the valve seat 9 is provided.
May be formed of a material that is attracted to the permanent magnet. Further, a valve seat incorporating a permanent magnet may be provided on the primary side. In this case, if for some reason the pressure on the secondary side 33 becomes higher than the pressure on the primary side 32 and the valve body 2 separates from the valve seat 9, the valve body 2 is moved from the valve seat 9 on the secondary side by one. Since it moves to and closely adheres to the next valve seat side, backflow can be prevented and accidents can be prevented.

Furthermore, the magnetically-powered ball stopper 1 of the first embodiment can be used for adjusting the fluid flow rate in addition to the function of blocking the flow path. That is, by stopping the length of the linear material 19 at an intermediate position where the valve element 2 does not block the flow path 31, the valve element 2
Is held in a half-open state with respect to the valve seat 9. The magnitude of the flow rate is determined by the degree of the half-open state, and the flow rate can be adjusted. In this case, since the flow line of the fluid has a smooth shape along the spherical surface of the valve body 2, the flow rate can be adjusted with a small pressure loss.

Further, the ball plug 1 utilizing magnetic force according to the first embodiment
Is designed such that when opened, the bottom 13b of the inner surface of the valve body 13 is directly washed by the flowing fluid.
Even when is closed, the bottom 13b has a structure that is open to the primary fluid, so that fluid stagnation occurs at the bottom 13b on the inner surface of the main body, and problems such as sedimentation and deposition occur. No.

FIG. 2 is a longitudinal sectional view showing a second embodiment similar to FIG. In the ball tap 1 utilizing magnetic force according to the second embodiment, a permanent magnet 6 is provided on the valve body 2, and the valve seat 9 is formed of a material adsorbed by the permanent magnet 6, for example, a paramagnetic material or a ferromagnetic material. The valve body 2 and the valve seat 9 are closely adhered to each other or strengthened by the magnetic force of the permanent magnet 6, and the flow path 31
Cut off. Since the structure and operation of the other parts in FIG. 2 are the same as those of the magnetic force utilizing ball stopper of the first embodiment in FIG. 1, the description thereof is omitted.

FIG. 3 is a longitudinal sectional view showing a third embodiment similar to FIG. The ball tap 1 utilizing magnetic force according to the third embodiment includes a valve body 2 having a built-in electromagnet 7 and a valve seat 9 made of a material that is attracted to the magnetic force of the electromagnet 7. , Rigid and fluid flow direction 3
4, a valve stem 21 movable in a direction perpendicular to
The other end 2 is inserted into the recess formed at one end 22 of the
5 has a connecting rod 23 rotatably fixed, and one end 24 of the connecting rod 23 is formed in a T-shape and is fixed to the ball-shaped valve body 2. Therefore, the valve element operating means 18 moves the valve element 2 in a direction perpendicular to the flow direction 34 of the fluid flowing through the flow path 31 and supports the valve element 2 in a swingable manner in the fluid flow direction 34. Things.

The valve seat 9 is a secondary sleeve 16 of the two sleeves 16a and 16b fitted to the valve body 13.
It is provided on the inner side of b and is made of a material that is attracted to the magnetic force of the electromagnet 7, that is, a magnetic material such as a paramagnetic material or a ferromagnetic material. By providing the sleeve 16b, the material and finishing accuracy of the valve seat 9 can be determined as required, and a commercially available T-type joint can be used for the valve body 13, which is economical.

The valve stem 21 is inserted into the lid 13a via a sealing material 27, and one end 22 is formed with a concave portion. The other end 25 of the connecting rod 23 is inserted into the concave portion, and the pin It is swingably fixed in the plane. Alternatively, the valve seat 9 may be formed of an electromagnet, and the valve body 2 may be formed of a material that is magnetically attracted to the valve seat 9.

In the ball plug 1 utilizing magnetic force according to the third embodiment having the above-described structure, when the valve stem 21 is pushed down in a direction perpendicular to the flow direction 34 of the fluid, the ball-shaped valve body 2 goes through a half-open state. And placed in a fluid stream. At this time, the ball-shaped valve element 2 is connected to one end 22 of the valve rod 21 via the connecting rod 23.
When the valve rod 21 is further depressed, the valve body 2 swings in the fluid flow direction 34 and swings from the primary side 32 to the secondary side 33. Seat 9
To sit down.

In this case, even if the back pressure from the primary side 32 is small and the valve body 2 cannot be pressed against the valve seat 9 by the pressure of the fluid sufficiently, the operation of electrically switching the electromagnet 7, that is, The electromagnet 7 of the valve body and the battery 29 are connected by a wiring 30 and switched by a switch 28 to make the valve body 2 and the valve seat 9 have different polarities (NS or SN) from each other.
The valve element 2 can be easily attracted to the valve seat 9 to be in close contact therewith, and the flow path is reliably shut off.

Further, similarly to the magnetically-powered ball stoppers of the first and second embodiments, the magnetically-powered ball stopper 1 of the third embodiment is made of a material that is magnetically attracted to the inner side of the sleeve tube 16a. A similar effect can be achieved by forming a valve seat.
The structure and operation of the other parts in FIG.
Since it is the same as the magnetic force utilizing ball stopper of the embodiment, the description thereof will be omitted.

FIG. 4 is a longitudinal sectional view showing a fourth embodiment similar to FIG. Similar to the magnetic ball plug of the third embodiment, the magnetic ball plug 1 of the fourth embodiment has a valve body 2 having a built-in electromagnet 7 and a valve using a material that is attracted to the magnetic force of the electromagnet 7. A seat 9 is provided, and the valve body 2 is fixed to the lid 13 a by a spring 20 as the valve body operating means 18. The structure of the valve body 2 is the same as that of the valve body according to the third embodiment shown in FIG. 3, and the outside of the electromagnet 7 is covered with the sealing material 5. The valve seat 9 is provided on the inner side of the secondary sleeve tube 14b fitted to the valve body 13. A battery 29 for transmitting electricity to the electromagnet 7 of the valve body via the wiring 30 and a changeover switch 28 are provided. The valve seat 9 may be formed of an electromagnet, and the valve body 2 may be formed of a material that is magnetically attracted to the valve seat 9.

In the ball tap 1 utilizing magnetic force according to the fourth embodiment having the above structure, the switch 28 is turned on and the electromagnet 7
And the valve body 2 and the valve seat 9 have different polarities (NS or S
N), the valve element 2 is attracted to the valve seat 9 against the resistance of the spring, and the valve element position 2 indicated by a two-dot chain line in FIG.
a, and adheres tightly, thereby reliably blocking the flow path. Since the structure and operation of the other parts in FIG. 4 are the same as those of the magnetically-powered ball stopper of the first to third embodiments, the description thereof is omitted.

FIGS. 5A and 5B show a fifth embodiment of a ball tap using magnetic force according to the present invention, wherein FIG. 5A is a longitudinal sectional view and FIG. 5B is a longitudinal sectional view of a main part of FIG. The ball tap 1 utilizing magnetic force according to the fifth embodiment is provided in a flow path 31 where the differential pressure between the fluid on the primary side 32 and the secondary side 33 is large, and adjusts the flow rate of the fluid to shut off the flow path 31. is there. Furthermore, a ball-shaped valve body 2 having an electromagnet 7, a valve seat 9 having a permanent magnet 10 for bringing the valve body 2 close to and in close contact with each other, and is not affected by magnetic force provided inside the valve body 2 and the valve seat 9 And a valve body operating unit 18 similar to the valve body operating unit shown in FIG.

In the ball plug 1 utilizing magnetic force according to the fifth embodiment having the above-described structure, the back pressure of the primary side 32 of the flow path is high and the valve body 2 is connected to the valve seat 9 when the cutoff of the flow path 31 is released. When the force for separating the valve body 2 is very large, the valve body 2 and the valve seat 9 are magnetically repelled from each other and separated from each other. The force that separates the valve body 2 from the valve seat 9 is, for example, when an emergency shutoff is performed and then the shutoff is released.
When a pressure of 10 kgf / cm ² is applied to a valve seat having an inner diameter of 10 cm, a force of 785 kgf or more is required, and it is difficult to directly release the force by human power.

In such a case, the operation of electrically switching the electromagnet 7 of the valve body seated on the valve seat 9, that is, the electromagnet 7 of the valve body
The battery 29 and the battery 29 are connected by a wire 30 and energized by a switch 28, as shown in FIG. 5B, so that at least the vicinity of a predetermined portion 3 of the valve body 2 and the valve seat 9 have the same polarity (NN). Or SS), and the valve body 2 and the valve seat 9 are repelled by magnetic force. Further, the rigid valve rod 21 is pulled up to separate the valve body 2 from the valve seat 9, and the cutoff of the flow path 31 is released. As described above, even when the pressure difference between the primary side and the secondary side of the flow path 31 is large and the force for separating the valve body 2 from the valve seat 9 is very large, by performing the electrical switching operation, the valve body 2 and the valve The seats 9 can be easily repelled from each other by magnetic repulsion.

Since the valve body operating means 18 has a rigid structure, a predetermined portion 3 of the valve body 2 comes into contact with the valve seat 9.
Is formed so as to repel magnetically. Valve seat 9
Has a ring-like shape, and when the predetermined portion 3 of the valve body is the N pole, the side of the valve seat 9 that contacts the valve body 2 is the N pole,
The opposite side is the S pole. Of course, the opposite side of the valve element 2 from the predetermined location 3 is an S pole as shown in FIG.

The structure and operation of the other parts in FIG. 5 and backflow prevention when the pressure on the secondary side 33 is higher than the pressure on the primary side 32, adjustment of the fluid flow rate, the valve body bottom 1
The prevention of "stagnation" of the fluid 3b and the like are the same as those shown in FIG.

FIG. 6 is a longitudinal sectional view showing a sixth embodiment of a ball tap utilizing magnetic force according to the present invention. The ball tap 1 utilizing magnetic force according to the sixth embodiment includes a ball-shaped valve body 2 made of a material that is attracted to a magnetic force, a valve seat 9 for bringing the valve body 2 into close proximity and close contact, a valve body 2 and a valve. And a valve body 13 formed of a material which is not affected by magnetic force and has a seat 9 provided therein. Further, the valve element operating means 18 for operating the valve element 2 attracts the valve element 2 by energizing the electromagnet 17 provided on the valve body 13 and releases the cutoff of the flow path 31. Furthermore,
The flow path 31 is shut off by turning off the power supply to the electromagnet 17. The electromagnet 17 is energized or de-energized by the battery 29 and the switch 28 via the wiring 30.

The ball plug 1 utilizing magnetic force according to the sixth embodiment is
As shown in FIG. 6, a valve body operating means 18 is provided on the upper part, and the electromagnet 17 is built in the lid 13a. However, the present invention is not limited to this, and the electromagnet 17 is built in an appropriate portion of the valve body 13. May be. The center of the valve body 2 is the electromagnet 17.
Is formed of a paramagnetic material, a ferromagnetic material, or the like as described above, and a sealing material 5 is lined on the outside thereof. The material of the sealing material 5 is a relatively soft and elastic material such as resin, synthetic rubber or metal.

In the ball plug 1 utilizing magnetic force according to the sixth embodiment having the above-described structure, a magnetic force is generated by energizing the electromagnet 17 provided on the lid 13a, and the magnetic force generates the magnetic force at the valve body position 2a in FIG. The valve element is separated from the valve seat 9 and is attracted to the electromagnet 17, thereby releasing the cutoff of the flow path 31. Further, when the energization of the electromagnet 17 is stopped, the adsorbed valve body 2 is seated on the valve seat 9 by gravity or the drawing action of the fluid flowing through the flow path 31, and further the primary side 32.
And the fluid side pressure of the secondary side 33 and the valve 3
Block 1 The valve body position 2b is such that the electromagnet 17 is
3 shows a state in which the valve body 2 is stopped at an intermediate position and the fluid flow rate is adjusted by appropriately providing the valve body 2. In the ball plug 1 utilizing magnetic force according to the sixth embodiment, the valve element operating means 18 has a very simple structure, is reliable in operation, and is economical in terms of cost. Preferably, the strength of the electromagnet 17 is adjusted according to the pressure difference between the primary side and the secondary side.

FIG. 7 is a longitudinal sectional view showing a seventh embodiment similar to FIG. As shown in FIG. 7, the ball tap 1 utilizing magnetic force according to the seventh embodiment is provided with a valve body operating means 18 at a lower portion. To the valve seat 9 side. FIG.
Since the structure and operation of the other parts in are the same as those of the magnetic force utilizing ball stopper of the sixth embodiment, the description thereof will be omitted.

[0040]

According to the ball tap using magnetic force of the present invention, 1
When the flow path is shut off when the fluid differential pressure between the secondary side and the secondary side is small, sufficient close contact between the valve body and the valve seat is obtained, and the operation is reliable.

Further, according to the other ball tap utilizing magnetic force of the present invention, when the blockage of the flow passage is released when the fluid pressure difference between the primary side and the secondary side is large, the valve body can be easily removed from the valve seat. It can be separated and the operation is reliable.

Further, according to still another ball plug utilizing magnetic force of the present invention, the passage can be reliably shut off and opened by a simple structure, and the cost is economical.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of a magnetic ball tap according to the present invention.

FIG. 2 is a longitudinal sectional view showing a second embodiment similar to FIG.

FIG. 3 is a longitudinal sectional view showing a third embodiment similar to FIG.

FIG. 4 is a longitudinal sectional view showing a fourth embodiment similar to FIG.

FIGS. 5A and 5B show a fifth embodiment of a ball tap using magnetic force according to the present invention, wherein FIG. 5A is a longitudinal sectional view and FIG.

FIG. 6 is a vertical sectional view showing a sixth embodiment of a ball tap utilizing magnetic force according to the present invention.

FIG. 7 is a longitudinal sectional view showing a seventh embodiment similar to FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ball plug using magnetic force 2 Valve body 3 Predetermined place 4 Material adsorbed by magnet 6 Permanent magnet (magnet) 7 Electromagnet (magnet) 9 Valve seat 10 Permanent magnet (magnet) 13 Valve body 17 Electromagnet 18 Valve body operating means 21 Valve stem 31 Flow path 32 Primary side 33 Secondary side

Claims (5)

[Claims] 1. A flow path in which a pressure difference between a primary side fluid and a secondary side fluid is small. The flow rate of the fluid is adjusted to shut off the flow path. A valve seat for bringing the valve body close to and in close contact with the valve body, a valve body made of a material which is provided with the valve body and the valve seat inside and not affected by magnetic force, and a valve body operating means for bringing the valve body close to and seated on the valve seat Wherein the valve element and the valve seat close each other by magnetic force, or the flow path is shut off by strengthening the close contact with each other by magnetic force. 2. The ball tap according to claim 1, wherein one of the valve body and the valve seat has a magnet, and the other is formed of a material that is attracted to the magnet. 3. The ball tap according to claim 2, wherein the magnet is an electromagnet. 4. A ball-shaped valve body having an electromagnet, provided in a flow path having a large differential pressure between a primary side fluid and a secondary side fluid, and controlling a flow rate of the fluid to shut off the flow path; A valve seat that has the valve body close to and in close contact with the valve body, a valve body formed of a material that is not affected by magnetic force provided inside the valve body and the valve seat, and the valve body having a rigid valve stem. A valve body operating means for supporting the valve body and operating the valve stem to bring the valve body close to the valve seat or seat a predetermined portion of the valve body on the valve seat; A magnetically-powered ball plug, wherein the valve body and the valve seat repel each other by magnetic force by applying an electric current to an electromagnet to release the cutoff of the flow path. 5. A ball-shaped valve body made of a material adsorbed by a magnet, a valve seat for bringing the valve body close to and in close contact with the valve body, and a magnetic force provided inside the valve body and the valve seat. A valve body formed of a material that is not formed, and by energizing an electromagnet provided in the valve body to adsorb the valve body and release the cutoff of the flow path, and cut off the energization of the electromagnet to cut the flow path. A ball plug using magnetic force, comprising: a valve body operating means for shutting off.