JP4547648B2 - Valve device - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a valve device that can be used as a flowing water detection device, a pressure adjustment valve, a gate valve, or a simultaneous release valve to be attached to a pipe body that supplies fluid.
[0002]
[Prior art]
Various types of valve devices used for fluid blocking and conduction have been proposed in the past, and the movement of the valve body of the valve device is generally perpendicular to the fluid flow direction. is there. In such a case, the operation means of the valve body is operated in a manual or electric manner by a rotating rod or a driving rod or the like protruding substantially perpendicular to the fluid flow direction.
[0003]
[Problems to be solved by the invention]
The operating means such as the above-mentioned rotating rod or driving rod will protrude mainly from the pipe line at right angles, and the space occupancy rate of the valve device will be extremely high at construction sites where piping space is limited. For example, when installing a pipeline in the basement, install the valve device at a deeper position by installing the center line deeply according to the operating means, or by bending the pipeline, etc. There is a problem that it is difficult to achieve space saving by reducing the burial depth of the pipe line.
[Means for Solving the Problems]
[0004]
First of all, by moving the valve body inside the valve device attached to the pipeline in parallel with the pipeline and adapting the outer dimensions of the valve device to the outer dimensions of the pipeline, The protruding operating means is removed. For this purpose, the conventional substantially disc-shaped valve body and the valve seat closed thereby are replaced with a cylinder and a piston so that the sliding of the piston directly controls the shutoff and conduction of the fluid.
[0005]
Further, the piston is formed in a hollow cylindrical shape so that fluid is fed through the inside of the piston so as to secure a flow rate without increasing the overall external dimensions of the valve device. The external dimensions of the valve device in the present invention have been devised so as not to exceed the diameter dimension of the flange of the pipe line to be connected.
DETAILED DESCRIPTION OF THE INVENTION
[0006]
A basic configuration when the valve device of the present invention is used as a pressure regulating valve according to FIG. 1 will be described. Reference numeral 1 is a piston having a lumen 2, and a valve body 3 is fixed at one end thereof, and an opening close to the valve body 3. 4 opens from the lumen 2 of the piston 1 toward the outside of the piston 1. Reference numeral 5 denotes an open end of the lumen 2 provided at the other end of the piston 1. Further, a circumferential projecting edge 6 projecting from the outer periphery of the piston 1 at a right angle with respect to the axis of the piston 1 is provided at the approximate center of the piston 1, and the tip of the projecting edge 6 extends over the entire circumference. A seal 7 is applied.
[0007]
8 is a cylinder that partially accommodates the piston 1. A seal 7 at the tip of the protruding edge 6 of the piston 1 is in close contact with the inner wall of the internal space, and the end of the cylinder 8 having the valve body 3 is a cylinder circle. Projecting through the hole 10 (see FIG. 2), the opposite side of the end of the cylinder 8 having the circular hole 10 is made bottomless to form an open end 11. The cylinder 8 in which the piston 1 is inserted is liquid-tightly accommodated in a hollow cylindrical covering cylinder 12, and one opening of the covering cylinder 12 is provided with a through hole 13 that is closed by the valve body 3 of the piston 1. The bottom plate is closed by a lid 14 and the other opening of the covering cylinder 12 closes the open end 11 of the cylinder 8 and has a through-hole 15 that allows liquid-tight sliding of the open end 5 of the piston 1. 16 is closed.
[0008]
The internal space of the cylinder 8 is divided into two parts by the protruding edge 6 of the piston 1, and the first internal space 9 a on the left side of the divided protruding edge 6 in the figure has a first water passage hole 17. The second inner space 9b on the right side is provided with a second water passage hole 18, and these water passage holes separately open the two inner spaces to the outside of the apparatus. The covering cylinder 12, the lid body 14, and the bottom plate 16 are fixed in a liquid-tight manner, and a spring S is stretched between the bottom plate 16 and the protruding edge 6 of the piston 1 in the first internal space 9 a of the cylinder 8. The piston 1 is urged toward the lid 14. A through hole 15 of the bottom plate 16 is continuously provided with a reduced diameter hole 21, and a first through hole 22 is formed from the reduced diameter hole 21 toward the outer surface of the bottom plate 16. The bottom plate 16 has a second through hole 23 that opens from the outer surface to the first internal space 9a, and a third through hole from the through hole 13 of the lid body 14 toward the outer surface of the lid body 14. 24 is drilled.
[0009]
In the figure, A and B indicated by chain lines on the left and right sides of the apparatus are a part of the pipeline where the apparatus of the present invention should be installed, the pipeline A indicates the water supply source side, and the pipeline B indicates the water supply destination side. Yes. In addition, P in the figure indicates a pilot valve that operates according to a set pressure. Further, C1 is a flow path for supplying water on the water supply source side to the first inner space 9a of the cylinder 8 from the first through hole 22 via the strainer, check valve and valve 25, and C2 is the first flow path. This is a flow path for supplying water in the internal space 9a to the third through hole 24 on the water supply destination side through the pilot valve P. Further, the water taken into the flow path C <b> 1 from the first through hole 22 is branched and supplied to the second through hole 18, and fills the second internal space 9 b of the cylinder 8.
[0010]
As described above, the internal space of the cylinder 8 is divided into the two internal spaces 9a and 9b by the protruding edge 6 of the piston 1, and the spring S is stretched only in one of the first internal spaces 9a. The piston 1 is slightly biased in the direction of expanding the first internal space 9a and reducing the second internal space 9b. Thereby, when the pilot valve P is closed and the pressures of the two internal spaces 9a and 9b are kept equal, or when no water pressure is applied to the two internal spaces, the piston 1 moves to the right in the figure. As a result, the valve body 3 at the end of the piston 1 closes the through hole 13 of the lid body 14, and the water on the water supply source side is blocked from flowing. Is secured.
[0011]
Next, the operation will be described. In the case of FIG. 1, the left side is the water supply source side, the right side is the water supply destination side, and the water supply is blocked by the valve device according to the present invention. Temporarily, the water pressure on the water source side is 20 kg / square cm, the water pressure on the water destination side is 5 kg / square cm, and the valve device is opened only when the water pressure on the water source side falls below a predetermined value. It shall be stipulated that water is sent to the side.
[0012]
The main flow of water from the pipe A passes through the hole 21 of the bottom plate 16 and the through hole 15, the lumen 2 of the piston 1, the opening 4, the cylinder 8, the covering cylinder 12, and the lumen 12 formed by the lid body 14. 'To reach. The through hole 13 of the lid body 14 is closed by the valve body 3 of the piston 1.
[0013]
The side flow of water from the pipe A is fed from the first through hole 22 of the bottom plate 16 to the second through hole 23 of the bottom plate 16 through the flow path C1 and finally the first internal space of the cylinder 8. 9a will be satisfied. Further, since the water branched from the flow path C1 is also supplied to the second internal space 9b of the cylinder 8, the first internal space 9a and the second internal space 9b of the cylinder 8 have the same pressure. Will be filled with water.
[0014]
Further, the first water passage hole 17 that is continuous with the first inner space 9a of the cylinder 8 is connected to the third hole 24 of the lid body 14 through the flow path C2 and through the pilot valve P. The through hole 24 opens to the through hole 13 of the lid body 14 and is connected to the pipe B on the water supply side. The set pressure of the pilot valve P in the description of this embodiment is 5 Kg / square cm. When the water pressure in the pipe B drops below that pressure, the pilot valve P is opened, and the first internal space 9a, the first passage A series of water flows such as the water hole 17, the flow path C2, the pilot valve P, the flow path C2, and the third through hole 24 are generated, and a decrease in the water pressure in the first internal space 9a is derived.
[0015]
FIG. 2 is a component diagram for helping understanding of the embodiment shown in FIG. 1 and shows the piston 1, the channel C1, and the channel C2 removed from FIG. 3 and 4 are conceptual diagrams showing the closed state and the open state of the valve device according to the present invention. In the closed state of FIG. 3, when the pressure on the pipe B side drops to 5 kg / square cm or less, the pilot The valve P is opened, and the water in the first internal space 9a of the cylinder 8 is fed into the pipe line B from the third through hole 24 of the lid body 14 through the first water through hole 17 and the flow path C2.
The first internal space 9a and the second internal space 9b of the cylinder 8 continue to be supplied with water having a pressure of 20 kg / square cm on the side of the pipe A, but the first pressure continues to be reduced via the pilot valve P. The water pressure in the internal space 9a decreases, and the water pressure in the second internal space 9b pushes and moves the protruding edge 6 of the piston 1 to the left in the drawing. As a result, the through-hole 13 of the lid 14 that has been closed by the valve body 3 of the piston 1 is opened, and the water supplied from the pipe A to the inner cavity 12 ′ of the covering cylinder 12 quickly moves to the pipe B side. Flow into. The arrangement of the components in the conceptual diagram in this state is as shown in FIG.
[0016]
When the pressure on the pipeline B side increases due to the inflow of water on the pipeline A side, the increase in pressure is transmitted to the pilot valve P via the flow path C2, and when the pressure exceeds 5 kg / square cm, the pilot valve P Closes. As a result, the pressure drop in the first internal space 9a of the cylinder 8 stops, and when the water pressure in the first internal space 9a and the second internal space 9b becomes equal, the pressure on the pipe A side is high. Since the B side has a low pressure, the piston 1 slides to the right in the drawing by the water pressure on the water supply side received by the pressure receiving surface of the piston 1, and the valve body 3 closes the through hole 13 of the lid body 14. Water supply to the destination is stopped.
[0017]
By repeating such operations, when the water pressure on the water destination side falls below the set value, the water on the water source side is supplied to the water destination side, and when the water pressure on the water destination side exceeds the set value, Operation to stop water supply from the water supply source side can be secured. Further, according to the structure of the present invention, the flow path C1 and the flow path C2 are divided into the first through hole 22, the second through hole 23, the first water through hole 17, the second water through hole 18, and the third through hole. Various operating conditions desired by the user can be obtained depending on how the connection is made to the through-hole 24. In addition to selecting and using the connection direction of the valve device to the pipe A and the pipe B, other than the pressure regulating valve Of course, various types of valve devices can be obtained.
[0018]
In the illustrated example, the strainer, check valve, valve, pilot valve, and the like are shown separately from the main part of the device for the sake of simplicity, but these components are placed in the bottom plate 16 or the lid 14. It is possible to easily embed the apparatus and fit the apparatus within the outer diameter of the covering cylinder 12. Furthermore, in the description, the covering cylinder 12, the lid body 14, the bottom plate 16 and the cylinder 8 are shown as independent parts, but the covering cylinder 12 and other parts are appropriately combined as necessary as an integral part. It is also optional to design.
【The invention's effect】
According to the present invention, since the valve device can be completely accommodated in a diameter approximately equal to the diameter of the pipe line to be connected, various problems related to the installation of the valve device can be completely solved and the structure is simple. Therefore, it is possible to provide a valve device that can be reliably operated at low cost, and only the pressure of the fluid in each of the pipe A and the pipe B is used for the operation of the valve apparatus. There is an effect that it is possible to suppress a typical control device to a minimum, and this point also has an effect of further improving the convenience when installing the valve device.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an embodiment of the device of the present invention.
FIG. 2 is an explanatory sectional view showing a state in which a piston and the like are removed from an embodiment of the device of the present invention.
FIG. 3 is a conceptual diagram showing a state in which a valve of an embodiment of the device of the present invention is closed.
FIG. 4 is a conceptual diagram showing a state in which a valve of an embodiment of the present invention device is opened.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Piston 2 Lumen 3 Valve body 4 Opening part 5 Open end 6 Protruding edge 7 Seal 8 Cylinder 9a First internal space 9b Second internal space 10 Circular hole 11 Open end part 12 Covered cylinder 12 ' 13 Through-hole 14 Lid 15 Through-hole 16 Bottom plate 17 First water-passing hole 18 Second water-passing hole 21 Reduced-diameter hole 22 First through-hole 23 Second through-hole 24 Third through-hole 25 Valve A Pipe line B Pipe line C1 Flow path C2 Flow path P Pilot valve S Spring

Claims (1)

It has a lumen with a valve body fixed at one end, an open end at the other end, an opening from the lumen to the outside in the vicinity of the valve body, and a circumferential protruding edge protruding from the outer periphery A piston,
A bottom plate having a through-hole through which the open end of the piston enters and slides and a diameter-reducing hole continuous thereto, a lid body having a through-hole opened and closed by a valve body of the piston, and a covering cylinder are liquid-tightly enclosed, and inside thereof The internal space is constituted by a cylinder divided into a first internal space and a second internal space by a protruding edge of the piston housed liquid-tightly,
In the first internal space, a spring is stretched between the bottom plate and the protruding edge,
The bottom plate has a first through hole for conducting the reduced diameter hole and the outside, and a second through hole for conducting the outside and the first space of the cylinder.
The lid has a third through hole that connects the through hole to the outside.
The cylinder was provided with a first water passage hole for connecting the first internal space and the outside through the coated cylinder, and a second water hole for connecting the second internal space and the outside, respectively. A valve device characterized by that.

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