JP2603048Y2 - On-off valve - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-off valve, and more particularly to an on-off valve for opening and closing a flow path by moving a valve body toward and away from a cylindrical valve seat.

[0002]

2. Description of the Related Art A conventional on-off valve will be described with reference to FIG. The on-off valve 100 shown in FIG. 3 is an electromagnetic on-off valve. In FIG. 3, reference numeral 102 denotes a valve seat, which is provided in the flow path 104. Reference numeral 106 denotes a valve body, which is provided on the diaphragm 108 and is movable toward and away from the valve seat 102. The state shown in FIG. 3 is a state in which the valve element 106 is seated on the valve seat 102, and prevents the movement of the fluid in the flow path 104. When a current is supplied to an electromagnetic coil (not shown), the valve 106 moves upward and separates from the valve seat 102. When the valve body 106 and the valve seat 102 are separated from each other, the fluid in the flow path 104 can move, and the fluid moves again.

[0003]

However, the above-mentioned conventional on-off valve has the following problems. As shown in FIG. 3, when the valve body 106 is seated on the valve seat 102, the valve body 106 is pressed against the valve seat 102 by the urging force of the spring 110. That is, the seating of the valve body 106 on the valve seat 102 is held by the force urging the valve body 106 downward. Therefore, when a lateral force acts on the valve element 106, the valve element 106 easily moves with respect to the valve seat 102. If the amount of movement is significant, a gap is generated between the valve element 106 and the valve seat 102. As a result, fluid may leak from the gap. In particular, in the case of a diaphragm valve,
The fact that the body shifts laterally means that the diaphragm is abnormal
Means that the diaphragm is centered
Since it is symmetrical, the abnormal deformation is restored to its original shape.
Acts as a force to return, and thus the opening and closing movement
There is a problem that chatter phenomenon occurs at start.

[0004]

In order to solve the above problems, the present invention has the following arrangement. That is, a cylinder
The valve seat provided in a shape and the valve element that comes into contact with and separates from the valve seat are integrated.
Provided, a diaphragm sandwiched between the main body at the edge,
A spring that normally urges the valve body so as to contact the valve seat
And projecting from the valve body in the opposite direction to the valve seat.
Both slide into the center hole provided in the guide member, and the valve seat of the valve element
Plunger that moves up and down in the center hole as it moves toward and away from
Is disposed so as to be fitted to the guide member, and is energized.
At this time, the plunger is sucked and the valve body is separated from the valve seat
An on-off valve comprising:
The body has an outer diameter smaller than the inner diameter of the valve seat,
It is characterized in that a slidable portion is provided. Also
The present invention provides a valve seat provided in a cylindrical shape in a flow path,
The valve body that comes in contact with and separates from the body is provided integrally, and
The fixed diaphragm and the valve element always contact the valve seat
Between the spring and the valve seat from the valve body.
A center hole protruded in the opposite direction and provided in the guide member
And the inside of the center hole with the movement of the valve body to and from the valve seat.
A plunger that moves up and down and fits around the guide member
When energized, the plunger is sucked,
An electromagnetic coil for moving the valve body away from the valve seat
In the valve, the valve body has an inner diameter larger than an outer diameter of the valve seat.
A sliding part having a diameter and slidable so as to fit
It is characterized by the fact that

[0005]

[Operation] The operation will be described. The valve body projects from the valve body
Guide plunger slides into the center hole of the guide member
As well as sliding into a cylindrical valve seat,
Alternatively, it has a sliding portion that slides outside the valve seat,
The other side of the jaws is also guided by the cylindrical valve seat, so to speak
, So that it is supported on the valve body from the side
Even if force is applied, the valve body is prevented from moving laterally,
Leakage can be prevented, the valve body can be opened and closed stably, and
Abnormal deformation of the diaphragm can be prevented, and the opening / closing
The chatter phenomenon at the time of booting can be prevented.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a solenoid on-off valve 10 according to this embodiment.
FIG. The electromagnetic on-off valve 10 is connected to, for example, a middle part of a water pipe (not shown) and regulates a flow of water flowing through the water pipe.

In FIG. 1, reference numeral 12 denotes a flow passage, which is formed in a main body 16. The flow path 12 has, for example, an inlet 14 at the right end and an outlet 18 at the left end. In that case, water enters the flow channel 12 from the inlet 14 and the outlet 1
Flow out of 8. Reference numeral 22 denotes a valve seat, which is provided in the flow channel 12. The valve seat 22 is formed in a cylindrical shape rising upward in the flow path 12, and has an open upper end surface.
Therefore, when the valve seat 22 is open, the flow path 1
The water that has entered the interior 2 is guided by the valve seat 22 and once flows upward, and changes the direction of the flow from the valve seat 22 toward the lower outlet 18.

Reference numeral 24 denotes a valve body, which is formed of synthetic rubber integrally with the diaphragm 20. The edge of the diaphragm 20 is watertightly clamped to the main body 16. The valve body 24 can move toward and away from the valve seat 22 by deformation of the diaphragm 20. A sliding portion 26 is provided vertically on the lower surface of the valve body 24. The outer diameter of the sliding portion 26 is slightly smaller than the inner diameter of the valve seat 22. When the valve body 24 is seated on the valve seat 22 (the state shown in FIG. 1), the sliding portion 26 is located inside the valve seat 22. It is possible to slide. Reference numeral 28 denotes a plunger made of a magnetic material. The plunger 28 is provided upright on the upper surface of the valve body 24, and slides into a center hole 32 of a guide member 30 fixed in the main body 16. Therefore, the valve element 2
The plunger 28 moves up and down in the center hole 32 of the guide member 30 in accordance with the movement of the plunger 28 toward and away from the valve seat 22.

Reference numeral 34 denotes a spring as an example of the urging means, which is elastically inserted between the main body 16 and the valve body 24 around the plunger 28. The spring 34 constantly urges the valve body 24 toward the valve seat 22. Note that a leaf spring or the like can be used as the biasing means instead of the coil spring shown in FIG. Reference numeral 36 denotes an electric circuit unit in which various electric circuits including an electromagnetic coil (not shown) are built. The electromagnetic coil is disposed at a position so as to be fitted onto the guide member 30. When the electromagnetic coil is energized, the plunger 28 is attracted upward against the urging force of the spring 34, and thus the valve is opened. Body 2
4 moves up.

In the electromagnetic on-off valve 10 configured as described above, when the electromagnetic coil in the electric circuit section 36 is energized, the electromagnetic coil is magnetized and the plunger 28 is attracted.
As a result, the plunger 28 and the valve body 24 move upward against the urging force of the spring 34, and the valve body 24
Separate from 2. Then, the water in the flow channel 12 flows to the outlet 18 through the valve seat 22 opened from the inlet 14 because the valve seat 22 is opened. In this flow state, when the energization of the electromagnetic coil is stopped, the magnetic force of the electromagnetic coil disappears, so that the force for attracting the plunger 28 and the valve body 24 upward disappears. As a result, plunger 2
8 and the valve element 24 are moved downward by the urging force of the spring 34, so that the sliding portion 26 slides into the valve seat 22 and the lower surface of the valve element 24 closes the valve seat 22 (the state shown in FIG. 1).
Due to this blockage, the flow of water is blocked by the valve body 24,
Water flow stops. This stopped state is maintained by the urging force of the spring 34.

In a state where the sliding portion 26 of the valve body 24 slides into the valve seat 22 and the lower surface of the valve body 24 closes the valve seat 22 (the state shown in FIG. 1), if the valve seat 2 is
Even if a lateral force acts on the two directions, the valve body 24
Since the sliding portion 26 slides into the cylindrical valve seat 22, it is possible to oppose the lateral force at the sliding portion. As a result, the lateral movement of the valve element 24 and the abnormal deformation of the diaphragm 20 are prevented, and no gap is generated between the valve element 24 and the valve seat 22.

Next, another embodiment will be described with reference to FIG. In the embodiment of FIG. 1, the sliding of the valve element 24 and the valve seat 22 is performed by a sliding portion 26 which is vertically provided on the lower surface of the valve seat 22 and can slide into the valve seat 22. The sliding portion 50 in the embodiment of FIG. 2 is formed in a tubular shape. The sliding portion 50 is a valve body 52
The inner diameter of the valve seat 54 is slightly larger than the outer diameter of the valve seat 54. When the valve element 52 moves downward to close the valve seat 54, the sliding portion 50 slides so as to fit on the valve seat 54, and closes the valve seat 54 on the lower surface of the valve body 52 inside the sliding portion 50. It has become.

In the embodiment shown in FIG. 2, the valve seat 52 is closed to the valve seat 52 while the lower surface of the valve seat 52 closes the valve seat 54.
Even if a force in the lateral direction acts on the four directions, the valve body 52
Since the sliding portion 50 is externally fitted to and slides on the cylindrical valve seat 54, the sliding portion can oppose the lateral force. As a result, lateral movement of the valve body 52 and abnormal deformation of the diaphragm 56 are prevented, and no gap is generated between the valve body 52 and the valve seat 54. As described above, various preferred embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments. For example, the on-off valve does not regulate the flow of water, but regulates the flow of gas. Needless to say, many more modifications can be made without departing from the spirit of the invention.

[0014]

[Effect of the Invention] According to the on-off valve of the present invention, the valve element is a valve element.
The plunger protruding from
As well as slide into a cylindrical valve seat.
Or a sliding portion that slides on the outside of the valve seat.
The other side of the plunger is also guided by the cylindrical valve seat,
In other words, it is supported on both sides, so the valve body is horizontal to the valve seat direction.
The valve body is prevented from moving in the lateral direction even when force is applied from
Fluid can be prevented from leaking, and the valve
Opening and closing can prevent abnormal deformation of the diaphragm
The chatter phenomenon at the start of the operation can be prevented.

[Brief description of the drawings]

FIG. 1 is a front partial sectional view showing an embodiment of an on-off valve according to the present invention.

FIG. 2 is a partial sectional view showing another embodiment of the sliding portion of the valve element.

FIG. 3 is a front partial sectional view showing a conventional on-off valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electromagnetic on-off valve 12 Flow path 22 Valve seat 24 Valve body 26 Sliding part 50 Sliding part 52 Valve body 54 Valve seat

Claims (2)

(57) [Scope of request for utility model registration] 1. A valve seat provided in a cylindrical shape in a flow path, and the valve
A valve body that comes in contact with and separates from the seat is integrally provided, and is sandwiched between the body by the edge.
Attached diaphragm and valve body always to valve seat
And a valve seat from the valve body.
Are projected in the opposite direction, and
The center hole slides with the center hole, and moves with the valve body toward and away from the valve seat.
A plunger that moves up and down inside and an outer fitting to the guide member
So that when energized, the plunger is sucked,
An electromagnetic coil for separating the valve body from a valve seat.
In the on-off valve, the valve body has an outer diameter smaller than the inner diameter of the valve seat;
Opening / closing characterized by providing a slidable part in the seat
valve. 2. A valve seat provided in a cylindrical shape in a flow path, and the valve
A valve body that comes in contact with and separates from the seat is integrally provided, and is sandwiched between the body by the edge.
Attached diaphragm and valve body always to valve seat
And a valve seat from the valve body.
Are projected in the opposite direction, and
The center hole slides with the center hole, and moves with the valve body toward and away from the valve seat.
A plunger that moves up and down inside and an outer fitting to the guide member
So that when energized, the plunger is sucked,
An electromagnetic coil for separating the valve body from a valve seat.
In the on-off valve, the valve body has an inner diameter larger than the outer diameter of the valve seat,
A special feature is that it has a sliding portion that can slide to fit
On-off valve to be used.