KR20170049832A - A valve for fountain - Google Patents

Abstract

The present invention relates to a valve for a fountain comprising: a valve housing including a body unit which is connected to an injection nozzle (N) and has a partition wall formed in a path, and a cover; a driving unit installed in the valve housing and configured to be operated by external power; and a diaphragm assembly configured to move vertically by the driving unit. The diaphragm assembly comprises: a diaphragm which is located within the valve housing and includes a sealing unit in a predetermined area of a bottom surface; a center rod extended to the lower side from a diaphragm center axis; a plunger which is attached to the driving unit and configured to operate the diaphragm; and a first spring configured to connect the diaphragm and the plunger. According to the present invention, the opening and closing of a valve for a fountain can be stably performed even at high temperature, and a fountain effect having an exceptional response speed, in comparison with other valves, can be expressed. In addition, the service life is long, and the maintenance is easy.

Description

A valve for fountain

The present invention relates to a fountain valve, and more particularly, to a fountain valve including a diaphragm which is a valve opening / closing device, and which has a quick response speed of fraction generation and an improved life span.

The fountain, which is constructed for decoration purposes in a park, a garden pond, a square or an interior, is generally shaped such that the water pumped by the pump is delivered to the fountain nozzle through the duct and is discharged with a strong pressure from the fountain nozzle.

A fountain valve is provided between the channel and the fountain nozzle to selectively control the supply and cutoff of the water supplied to the fountain nozzle. By adjusting the water supply time and pressure to the fountain nozzle and operating it according to the music rhythm It will produce various fractions according to the three-dimensional rhythm.

At this time, while the pump continuously generates pressure, the fountain valve repeatedly opens and closes frequently for spraying the fractions, and the water must be sprayed or stopped from the fountain nozzle, resulting in wear or breakage due to frequent opening and closing. In addition, vibration and noise are generated due to the water hammer phenomenon in which the shock wave of the water that has been moved to the high pressure state by the instantaneous opening and closing of the fountain valve is caused, and this also causes wear and breakage.

Therefore, there is a problem that frequent replacement and replacement of the fountain valve occurs, and the safety of the operator must be taken into consideration due to the cumbersome work of replacing the repair work in water.

Meanwhile, a solenoid valve or a stepping motor is mainly used to control the fountain valve from the outside, and the inlet and the outlet of the fountain valve are opened / closed through the reciprocating motion of the plunger inserted inside the electric coil to supply the water supplied to the fountain nozzle And blocking is automatically controlled.

However, since the temperature inside the fountain valve rises by more than 60 degrees due to solar heat in the middle of the day, even if an electric signal is applied to the electric coil of the solenoid valve or the stepping motor, the pressure difference in the valve becomes high.

In such a case, there is a problem in that the response speed of the fraction generation is slow because the pressure of the pump is lowered to open and close the fractional valve or to cool the valve.

Therefore, it has become necessary to develop a fountain valve that can be opened and closed in a stable manner, can be used in a high temperature environment with a long life span, and has improved response speed.

Korean Patent Publication No. 10-2013-0015539

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fountain valve which is stable in opening and closing a fountain valve and has a long life and is easy to maintain.

Another object of the present invention is to provide a high-speed fraction valve that can be used in a high-temperature environment and has a superior ON / OFF response speed as compared with other valves.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to solve the above-mentioned problems, the present invention provides a valve apparatus comprising: a valve housing including a body portion connected to the injection nozzle and having a partition wall in a flow passage; A driving unit installed in the valve housing and operated by external electricity; And a diaphragm assembly moving up and down by the driving unit, wherein the diaphragm assembly includes: a diaphragm located inside the valve housing, the diaphragm including a sealing portion in a predetermined region of a lower surface; A center rod extending downward; A plunger attached to the driving unit to operate the diaphragm; And a first spring connecting the diaphragm and the plunger.

The diaphragm further includes a first groove formed in a predetermined region of the lower surface and a sealing portion inserted into the first groove, and the first groove is formed at a position corresponding to the partition of the valve body Thereby forming a fountain valve.

Further, the present invention provides a fountain valve wherein the diaphragm is a cylindrical metal member, and the sealing portion is a circular ring-shaped synthetic rubber or Teflon material.

The length h1 of the packing ring is set to be equal to the length h2 of the second groove portion, And a cross-sectional thickness d1 of the packing ring is not less than a thickness d2 of the second groove portion.

Further, the present invention is characterized in that the plunger comprises: a plurality of fine grooves formed on the outer circumferential surface in the longitudinal direction; And an insertion groove at the upper end; And

A second spring which is longer than the length of the insertion groove is inserted into the insertion groove, and a buffer member is further provided at the upper end of the second spring.

The cover may further comprise a guide tube on one side of the cover adjacent to the inlet to guide the flow of a portion of the fluid that has not passed through the septum and to press the upper surface of the diaphragm, Valve.

Further, the present invention provides a fountain valve, wherein the body portion further includes a support portion at a lower portion thereof, and the end portion of the center rod is guided in the support portion.

As described above, the fountain valve according to the present invention has the effect of stable opening and closing, a long life, and easy maintenance.

Further, according to the present invention, there is an effect that the valve can be used in a high temperature environment and has a superior ON / OFF response speed as compared with other valves.

1 is a schematic view for explaining a conventional diaphragm valve.
2 is a cross-sectional view schematically illustrating a fountain valve according to an embodiment of the present invention.
3 is a view illustrating a diaphragm assembly according to an embodiment of the present invention.
FIG. 4A is a view showing a state in which the flow path of the fraction valve according to the embodiment of the present invention is shut off, and FIG. 4B is a diagram showing a state in which the flow path of the fraction valve is opened.
5 is a cross-sectional view schematically illustrating a fountain valve according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. &Quot; and / or "include each and every combination of one or more of the mentioned items. ≪ RTI ID = 0.0 >

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms " comprises "and / or" comprising "used in the specification do not exclude the presence or addition of one or more other elements in addition to the stated element.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" And can be used to easily describe a correlation between an element and other elements. Spatially relative terms should be understood in terms of the directions shown in the drawings, including the different directions of components at the time of use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element . Thus, the exemplary term "below" can include both downward and upward directions. The components can also be oriented in different directions, so that spatially relative terms can be interpreted according to orientation.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, a solenoid valve or a stepping motor is applied to a fountain valve in order to externally control the generation of a fountain valve, and a general solenoid valve is inserted into an electric coil using an electromagnetic force generated by applying an electric power to a solenoid, And open and close the opening of the valve seat through the reciprocating movement of the plunger. Thereby opening and closing the inlet and outlet of the fountain valve and automatically controlling the supply and interruption of the water supplied to the fountain nozzle.

Conventionally, a diaphragm can be applied as a means for opening and closing a solenoid valve, and FIG. 1A is a schematic cross-sectional view for explaining a conventional diaphragm valve.

Referring to FIG. 1A, a conventional diaphragm valve includes a valve lower body 10, a diaphragm 20, a valve upper body 30, and a driving unit 40.

The valve lower main body 10 is formed with flanges 11 at both side ends thereof for connecting or fastening to other piping members by connecting members such as bolts and nuts, etc., and is mainly cast into a valve shape by a metal casting.

In addition, the driving unit 40 may include an electromagnetic driving unit such as a solenoid or a stepping motor, and operates the valve opening / closing means by applying an electrical signal to an electric coil provided inside the electromagnetic driving unit.

A partition wall 13 for interrupting the fluid is formed in the center of the flow passage 12 inside the valve lower main body 10. The fluid flowing in the flow passage is guided by the diaphragm 20 up and down, The operation of closing or opening the door is performed.

To this end, the driving unit is provided with a lifting device 30, and the connecting means 21 connected to the lifting device 30 is coupled with the center of the diaphragm 20.

1B is a view showing a diaphragm applied to a conventional diaphragm valve.

1A and 1B, the diaphragm 20 is a separator having a plate-like structure, which is generally made of a rubber material. The diaphragm connected to the diaphragm 20 vertically moves according to the ascending and descending of the elevating device 30, The concave portion rises or falls and the surface in contact with the partition wall 13 rises or falls to open or block the flow path.

However, since the diaphragm 20 is made of a soft material, if a local force acts continuously and repetitively on a certain portion, the diaphragm 20 can not withstand the deformation of the diaphragm 20, There is a problem that it takes a lot of time.

In addition, if a diaphragm of a plate-like rubber material is used for a fountain valve, impurities may remain on the diaphragm surface or the shape may be deformed and the fractions of the fractions may not be cut off cleanly. The failure is frequent and the service life is shortened.

Furthermore, unlike standard valves, diaphragms are rubber or PTFE with a non-ferrous metal separator, which limits the operating temperature range and maximum operating pressure. For example, in a fountain valve exposed to the outside of the summer season, the temperature inside the valve rises by more than 60 degrees due to solar heat, so even if an electric signal is applied to the coil, the pressure difference in the valve becomes high.

In this case, since the pressure of the pump is lowered and the fountain valve is opened or closed or the valve is cooled, the power consumption is high and the response speed of the fractions is slow.

Therefore, in the present invention, it is desired to provide a fountain valve with a diaphragm applied, which can stably open and close the valve, can be used even in a high temperature environment with a long life span, and has a quick response speed of rendering fractions.

FIG. 2 is a cross-sectional view schematically illustrating a fountain valve according to an embodiment of the present invention, and FIG. 3 is a diagram illustrating a diaphragm assembly applied to a fountain valve according to an embodiment of the present invention.

2, the fountain valve according to the present invention includes a valve housing 100 having a flow path communicated with the injection nozzle N, a driving unit 300 installed in the valve housing, And a diaphragm assembly 200, which is a valve opening / closing means operated by the driving unit, is formed inside the valve housing and the driving unit.

The valve housing (100)

A body 110 having an inlet 110a at one side thereof, a discharge port 110b communicating with the discharge nozzle N at the other side thereof, and a partition wall 120 formed between the inlet port and the discharge port; And

And a cover 130 formed with an induction pipe 131 for guiding the high-pressure fluid introduced from the inlet 110a to a space inside the valve housing above the diaphragm 210 to be described later.

The induction pipe 131 may be provided at one side of the cover adjacent to the inlet 110a to guide the flow of a part of the fluid that has not passed through the partition 120 and to press the upper surface of the diaphragm 210 have.

The opening and closing of the barrier 120 may be accomplished by lowering or elevating the diaphragm 210 by the driving unit 300. More specifically, when the driver 300 is operated and the diaphragm 210 is lowered, the lower surface of the diaphragm rubs against the upper end of the barrier 120 to close the flow path, and when the operation of the driving unit is released The diaphragm 210 moves up and down and the friction of the contact portion is released so that the flow of the fluid flowing from the inlet 110a is discharged to the discharge port 110a connected to the fountain nozzle N to produce a fraction.

Since the valve housing 100 includes the body 110 and the cover 130 so that the valve housing 100 can be vertically separated from the valve housing 100 according to the present invention, Maintenance can be performed easily. The valve body 110 and the cover 130 may be integrally coupled through a screw B and may include an O-ring 150 as a hermetic means.

Further, the cover 130 may include a fastener 132 coupled to the driving unit 300.

Subsequently, the driving unit 300 includes a body 310 incorporating a coil 311 that operates as an external electricity source;

And a core 320 for moving up and down the driving means by forming a pressure chamber in the inner space according to an electromagnetic actuation of the coil at the center of the body.

A plunger 230 of a diaphragm assembly 250 to be described later is inserted into the core 320 so that the plunger 230 inside the core 320 is moved up and down according to an electromagnetic operation of the coil. To operate the frame assembly.

Next, the diaphragm assembly 200 according to the present invention will be described.

The upper part of the diaphragm assembly 200 is inserted into the driving part 300 and the lower part of the diaphragm assembly 200 is inserted into the valve housing 100 to open and close the opened channel. .

3A and 3B are views showing a diaphragm assembly according to an embodiment of the present invention. FIG. 3A shows a state of a diaphragm assembly when a flow path is closed, and FIG. 3B shows a state of a diaphragm assembly when a flow path is opened to be. FIG. 3C is a view of the diaphragm of FIG. 3A viewed from direction A. FIG.

Referring to FIGS. 3A, 3B, and 3C, the diaphragm assembly 200 includes:

A diaphragm 210 located inside the valve housing and including a sealing portion 221 in a predetermined area of a lower surface thereof;

A center bar 250 extending downward from the center axis of the diaphragm;

A plunger (230) operated by the driving unit to open and close the diaphragm; And

And a first spring (240) connecting the diaphragm and the plunger.

At this time, the plunger 230 is provided on the same line as the center axis of the diaphragm and is moved up and down inside the core 320 of the driving unit, and the diaphragm 210 and the plunger 230 are connected The diaphragm 210 is moved up and down together with the plunger 230 by the first spring 240.

The diaphragm 210 is a cylindrical metallic material and a certain region of the lower surface of the diaphragm has a first groove portion 211 formed at a position corresponding to the partition 120 of the valve body portion 110 .

The first groove portion 211 is formed in a circular ring shape in a certain region of the lower surface of the diaphragm 210 and the sealing portion 221 is inserted into the first groove portion 211.

In the embodiment of the present invention, the metal member, the center rod 250, the plunger 230, and the first spring 240 constituting the cylindrical body of the diaphragm 210 are preferably made of an SUS material having excellent corrosion resistance and heat resistance Do.

Subsequently, the sealing portion 221 is formed of an elastic material such as a circular ring-shaped synthetic rubber (PTFE: Polytetrafluoroethylene) or Teflon (NBR: rile-butadiene rubber) corresponding to the first groove portion 211 .

The diaphragm including the sealing portion 221 rubs against the sealing portion 221 at a position corresponding to the partition 120 of the valve body portion 110. When the diaphragm 151 is moved up and down Friction and release due to contact with the partition 120 are selectively performed. In case of friction, the partition wall is blocked. When the friction is released, the partition wall is opened to control the flow of the passage.

In the embodiment of the present invention, the sealing portion 221 is shown as a circular ring having a cross section in the shape of a letter. However, the shape of the circular ring is not limited to the letter A, and various ring shapes such as O, Of course it is possible.

As described above, in the embodiment of the present invention, the diaphragm assembly 200 includes a diaphragm 210 of a cylindrical metal member having a predetermined thickness and a sealing portion 221 of an elastic material only in a certain region of the diaphragm ), So that it is much less abrasive and semi-permanently usable than conventional diaphragms made of thin plate-like synthetic rubber or Teflon.

The sealing portion 221 may be formed only in a region contacting the partition 120 formed in the valve body 110 so that noise and wear due to friction with the partition wall 120 when the diaphragm 210 moves up and down There is an effect to be prevented.

Subsequently, the sealing portion 221 may include airtight means in a certain region of the outer circumferential surface of the diaphragm 210 as well.

3A and 3B, the diaphragm 210 may include a second groove 212 in a certain region of the outer circumferential surface thereof and a packing ring 222 may be coupled to the second groove 212.

At this time, the length h1 of the packing ring 222 is smaller than the length h2 of the second groove 212, and the sectional thickness d1 of the packing ring is larger than the thickness d2 of the second groove portion 212 It is possible to freely move the packing ring 222 upward and downward in the second groove portion 212. In addition,

This is because the outer circumferential surface of the diaphragm 210, which is the metallic material, is prevented from coming into direct contact with the inner surface of the valve housing 100 cover 130 by the packing ring 222 to prevent noise and abrasion, To maintain watertightness.

Although the shape of the packing ring 222 is shown as a C-shaped circular ring in the embodiment of the present invention, the sectional shape of the circular ring is not limited to the C-shape, and various ring shapes such as O, Of course, may be applied.

Next, the plunger 230 includes a fine groove portion 231 formed on the outer circumferential surface in the longitudinal direction; And an insertion groove (232) at an upper end; As shown in FIG.

At this time, the second spring 250 is inserted into the insertion groove 232 and the buffering member 251 may be provided at the upper end of the second spring.

In the diaphragm assembly 200, the plunger 230 is configured to be lifted or lowered in the core 320 according to the presence or absence of the electromagnetic force of the coil 311 to which the external electricity is applied, The first spring 240 connecting one side with the diaphragm 210 is stretched or contracted and the diaphragm 210 is also lifted or lowered within the valve housing 100.

To this end, in the embodiment of the present invention, the length (l1) of the second spring in the compressed state is preferably larger than the length (12) of the insertion groove.

This is because when the plunger 230 is moved up and down by the actuation of the driving unit 300, the upper end of the plunger 230 may strike against the upper wall of the core 320, The second spring 250 provided at the upper end of the insertion groove 232 is compressed at the time of the collision with the upper wall of the core and the impact at the time of collision by the buffer member 251 at the upper end of the second spring is attenuated.

That is, the second spring 250 connecting the one side of the plunger 230 and the diaphragm center axis is extended when the plunger 230 moves up and down, and the diaphragm 210, which is connected to the first spring, The second spring 150 acts as a compression spring when the plunger is lifted or lowered, as opposed to acting as a tension spring.

The fine groove 231 has a plurality of longitudinal grooves formed on the outer circumferential surface of the plunger 230.

The fine grooves 231 are opened and closed instantaneously, and the shock wave caused by the hydraulic pressure supplied from the driving unit 300 flows into the fine grooves 231 to attenuate vibration and noise.

Subsequently, the center rod 250 is extended downward from the central axis of the diaphragm, and the end is inserted into the support portion 140 formed in the valve body portion 110.

That is, the center rod 250 is guided while being inserted into the support portion 140 of the valve body portion 110, and the diaphragm 210 is moved up and down.

In the case of the conventional diaphragm, since the periphery of the rubber diaphragm of a plate-like shape is fastened between the valve body and the cover without the center bar, the rubber portion of the diaphragm peripheral end is fixed to the valve housing, It was not easy, and there was a troublesome face to place the diaphragm in the center even after assembling after maintenance.

However, in the embodiment of the present invention, even if there is no separate support device on the outer circumferential surface of the diaphragm 210, the support rod 140 formed on the valve body 110, 250) is guided in the inserted state, the diaphragm center shaft can be prevented from moving even when the diaphragm is used for a long period of time.

5 is a cross-sectional view schematically showing a fountain valve according to another embodiment of the present invention.

Referring to FIG. 5, in another embodiment of the present invention, the center rod 250 'passes through the lower end of the valve body 110, unlike the embodiment of FIG. 2, To be confirmed by appearance.

As described above, when the center rod 250 'is configured to protrude to the outside of the valve body 110, it is possible to prevent the protrusion from moving smoothly when the diaphragm is deflected due to uneven wear, It is possible to confirm whether or not the diaphragm is defective without disassembling the fountain valve.

The operation of the fountain valve according to the embodiment of the present invention will now be described with reference to FIGS. 4A and 4B.

FIG. 4A is a view showing a state in which the flow path of the fraction valve according to the embodiment of the present invention is shut off, and FIG. 4B is a diagram showing a state in which the flow path of the fraction valve is opened.

In order to produce a fraction, a strong pressure device, that is, a pump (not shown), pushes the water drawn from the water source through a predetermined passage to a strong pressure. This pressure applied water opens the valve when the water is sprayed through the fountain nozzle through the opening and closing of the valve connected to the fraction nozzle (N) according to the intended direction of the water fraction, and in the opposite case, the valve is shut off .

Referring to FIG. 4A, when the driving unit 300 receives external electricity, the plunger 230 is lowered by the electromagnetic force of the coil 311, and the diaphragm 210 connected to the plunger is lowered do.

At this time, the diaphragm 210 connected to the plunger 230 and the first spring 240 is lowered while the pressure of the inner space of the core 320 is increased, and the lower surface of the diaphragm presses the upper end of the partition 120 So that the flow path is closed.

At this time, since the high-pressure fluid supplied from the pump (not shown) constantly applies pressure to the partition wall, the inlet 110a of the valve body 110 in the state where the flow path is closed, And a force P1 for pushing up the lower surface of the upper portion (lower portion).

In the present invention, in order to pressurize the upper surface of the diaphragm 210 by guiding the flow of a part of the fluid that has not passed through the partition 120, between the valve inlet 110a and the partition 120, The fluid of the high pressure state moves along the induction pipe and is transferred to the upper portion of the diaphragm 210 provided inside the cover 130 because the induction pipe 131 is further provided at one side of the cover adjacent to the cover 110a .

Accordingly, the high pressure water flows along the induction pipe to further press the upper surface of the diaphragm 210, so that the fountain valve can be easily stowed even at low power, and the valve can be stably closed.

4B is a view showing a state in which the flow path of the fountain valve according to the embodiment of the present invention is opened.

When the external electricity supplied to the driving unit 300 is cut off, the electromagnetic force acting on the coil 311 is released. At this time, the high pressure water staying in the valve inlet 110a pushes the diaphragm 210 The diaphragm 210 rises and the plunger 230 connected to the diaphragm 210 also rises inside the core.

At this time, the diaphragm 210 rises with the pressure in the inner space of the core 320 being released, and the friction with the partition 120 is released to open and close the flow passage, and the diaphragm and the first spring 240, The plunger 230 is also lifted.

The first spring 240 connecting the one side of the plunger 230 and the center axis of the diaphragm 230 is tensioned when the plunger 230 moves up and down, The second spring 150 provided in the groove on the plunger 230 acts as a compression spring upon lifting the plunger.

The upper end of the plunger 230 may collide with the core when the plunger 230 is lifted or lowered. At this time, the second spring 250 provided in the plunger upper end insertion groove 232 contacts the core 320, And it plays a role of mitigating impact when colliding with a wall surface.

The fountain valve of the present invention including the diaphragm opening / closing device configured as described above is stable in opening and closing, has a long service life, is easy to maintain and can be used in a high temperature environment, and has superior ON / OFF response speed .

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

100: valve housing 200: diaphragm assembly
300: driving part 110:
120: partition 130: cover
131: guide tube 140: support
311: coil 320: core
210: diaphragm 221: sealing part
222: packing ring 230: plunger
240: first spring 250: second spring
260: center rod

Claims (7)

A body portion connected to the injection nozzle N and having a partition wall formed in the passage, and a cover;
A driving unit installed in the valve housing and operated by external electricity; And
And a diaphragm assembly moving up and down by the driving unit,
The diaphragm assembly comprising:
A diaphragm located inside the valve housing and including a sealing portion in a certain region of the lower surface,
A center rod extending downward from the central axis of the diaphragm;
A plunger attached to the driving unit to operate the diaphragm; And
And a first spring connecting the diaphragm and the plunger. The method according to claim 1,
The diaphragm includes:
A first groove portion formed in a predetermined region of the lower surface, and a sealing portion inserted into the first groove portion,
Wherein the first groove portion is formed at a position corresponding to the partition wall of the valve body portion. 3. The method of claim 2,
Wherein the diaphragm is a cylindrical metal material,
Wherein the sealing portion is a circular ring-shaped synthetic rubber or Teflon material. 3. The method of claim 2,
The diaphragm includes:
And a packing ring inserted into the second groove portion and the second groove portion in a certain region of the outer circumferential surface,
Wherein a length h1 of the packing ring is equal to or less than a length h2 of the second groove and a sectional thickness d1 of the packing ring is equal to or greater than a thickness d2 of the second groove. 3. The method of claim 2,
The plunger,
A plurality of fine grooves formed in the outer peripheral surface in the longitudinal direction; And an insertion groove at an upper end; And
A second spring inserted into the insertion groove longer than a length of the insertion groove, and a buffer member at an upper end of the second spring. The method according to claim 1,
The cover
Further comprising an induction tube at one side of the cover adjacent the inlet to direct a flow of a portion of the fluid that has not passed through the septum and to press the upper surface of the diaphragm. The method according to claim 1,
The body portion may further include a support portion at a lower portion thereof,
And the guide portion is guided in a state where the end portion of the center rod is inserted into the support portion.

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