KR102341814B1 - Pressure reducing valve - Google Patents

Abstract

Provided is a pressure reducing valve adopting a low-cost airtight O-ring in movable members with no complicated parting lines. The pressure reducing valve comprises: a first valve housing including an extension pipe of a predetermined length which extends from an inlet port where raw water is introduced toward a water outlet side by a predetermined length, and a first outer pipe which surrounds the outside of the extension pipe in a circumferential direction, and communicating with an inlet pipe by the medium of a first fitting; a second valve housing extending from the water outlet through which the raw water is discharged to the first outer pipe, including a second outer pipe detachably coupled to the first outer pipe to form the inner space of a predetermined size for accommodating the extension pipe inside, and communicating with a water outlet pipe by the medium of a second fitting; a first movable body in which a first inner hole is formed through the center of the body corresponding to the extension pipe, and a first outer protrusion is formed on the outer surface corresponding to the second outer pipe, and thus which moves linearly along the extension pipe disposed in the space between the first and second valve housings; a second movable body in which a second inner hole is formed through the center of the body corresponding to the extension pipe, and a second outer protrusion is formed on the outer surface corresponding to the second outer pipe, and which is coupled to the first movable body to move along the extension pipe together with the first movable body; and an elastic body which is disposed in the extension pipe such that one end comes in contact with the first movable body assembled with the second movable body and the other end comes in contact with the first outer pipe, to elastically support the first movable body and the second movable body against the water outlet side.

Description

Pressure reducing valve

The present invention relates to a pressure reducing valve, and more particularly, a low-cost airtight when the first and second movable bodies are mutually coupled while dividing a movable member that moves with respect to the valve housing during pressure reduction of supplied raw water into a first movable body and a second movable body It relates to a pressure reducing valve that can be used by applying a low-cost airtight O-ring to a moving member without the need to form a complicated parting line by forming an arrangement groove in which the O-ring is disposed and arranging the O-ring for airtightness.

In general, the pressure of water (fluid) supplied to the water supply line of products such as water purifiers, water softeners and instantaneous water heaters from the water faucet, which is the source of raw water, varies depending on the region or surrounding conditions, but is usually 0kgf/cm2~15kgf/cm2 is supplied irregularly.

In the process of supplying from the raw water source to the inside of a product such as a water purifier through the water supply line, if the fluid is not supplied to the water supply line but is supplied at an irregular pressure, the fluid with uneven water pressure will impact the joints around the parts. When used for a long period of time, the service life of the product was shortened, while there was a problem in that it was not appropriate to use the fluid supplied in the product.

Accordingly, between a product such as a water purifier and a raw water supply source, a device such as a pressure reducing valve that lowers and maintains the fluid supplied into the water purifier to a constant pressure so as to appropriately lower the pressure delivered to the parts by the higher-pressure raw water than necessary is provided. will apply

This pressure reducing valve regulates the pressure on the outlet side to a pressure lower than the pressure on the inlet side regardless of the pressure on the inlet side. In addition, it is a core part that plays a role in minimizing the fluctuation of the set pressure even if there is a change in the inlet pressure or the fluid usage in the inlet.

(Patent Document 1) KR10-2014-0040314 A

In Patent Document 1, a housing having an inlet port at one end and an outlet port at the other end, installed on the water outlet side in the interior of the housing, communicating with the water inlet port and the water outlet port inside, and flowing in through the water inlet port A moving member movable in the vertical direction in the inside of the housing by a fixing member installed on the inlet side of the housing and having a flow path in communication with the water outlet, and the moving member installed inside the housing A diaphragm that applies an elastic force so as to be pressed in the direction of the water outlet and one end is fixed inside the housing, and the other end is connected to the moving member, preventing the fluid introduced through the water inlet from flowing into the elastic member. By including, when the moving member is moved by the pressure of the fluid, the diaphragm installs a diaphragm so that friction does not occur with the surrounding parts, prevents deformation or damage of the diaphragm, and starts a pressure reducing valve to prevent a decrease in pressure reduction performance are doing

However, in such a pressure reducing valve, the diaphragm does not cause friction with surrounding parts when the moving member is moved in a straight line to lower the high water pressure by using a diaphragm that replaces the O-ring, which is inexpensive to manufacture. Although it has the advantage of not needing to form an airtight parting line for this purpose, it increases the manufacturing cost by using an expensive diaphragm compared to the O-ring, and when the expensive diaphragm is damaged, replacing it with a new part is very cumbersome A problem occurred.

Accordingly, the present invention is to solve the above problems, and the object is to divide the moving member moving with respect to the valve housing when the supplied raw water is depressurized into the first moving body and the second moving body while configuring the first and second moving bodies. To provide a pressure reducing valve that can be used by applying a low-cost airtight O-ring to a moving member without the need to form a complicated parting line by forming an arrangement groove in which a low-cost airtight O-ring is placed when the airtight O-ring is disposed. do.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be able

As a specific means for achieving the above object, a preferred embodiment of the present invention is provided with an extension pipe of a certain length extending a certain length from the inlet port from which raw water is obtained to the water outlet side, and a first circumferential direction surrounding the outside of the extension tube A first valve housing having an external pipe and connected to the inlet pipe and the first fitting as a medium; extends from the water outlet through which raw water is discharged to the first external pipe, and is detachably coupled with the first external pipe to correspond to the extension pipe a second valve housing having a second external pipe forming an internal space of a predetermined size for accommodating the inside and communicating with the water outlet pipe and a second fitting part as a medium; A first inner hole is formed through the center of the body corresponding to the extension tube, and a first outer jaw is formed to protrude on an outer surface corresponding to the second outer tube, in the space between the first valve housing and the second valve housing. A first movable body that is linearly moved along the arranged extension pipe; A second inner hole is formed through the center of the body corresponding to the extension tube, and a second outer jaw is formed to protrude on an outer surface corresponding to the second outer tube, and is combined with the first movable body and is combined with the first movable body. a second movable body moving along the extension pipe; and an elastic body disposed on the extension pipe so that one end of the first movable body assembled with the second movable body is in contact with the first outer tube and the other end is in contact with the first movable body and the second movable body to elastically support the first movable body and the second movable body toward the water outlet. and disposing a first airtight O-ring in contact with the outer surface of the extension pipe between the end of the first movable body penetrating the first internal hole and the end of the second movable body penetrating the second internal hole and arranging a second airtight O-ring in contact with the inner surface of the second outer tube between the first outer jaw and the second outer jaw, so that when the first movable body and the second movable body are coupled, the extended tube and the second movable body A pressure reducing valve that seals the assembly portion between the first and second internal constructions by the first airtight O-ring, and seals the assembly portion between the second outer pipe and the first and second outer protruding jaws by the second airtight O-ring. to provide.

In this case, the extension tube includes a first extension tube of a predetermined length through which first and second inner holes formed through the center of each body of the first and second movable body are positioned corresponding to the outer surfaces and guided, respectively, and of the first extension tube It may include a second extension pipe having a predetermined length having an outer diameter greater than the outer diameter and inserting one end of the elastic body, and a step formed by a difference between the outer diameters of the first extension tube and the second extension tube.

At this time, the first outer pipe protrudes a plurality of coupling jaws that are elastically coupled one-to-one with a plurality of coupling holes formed through the second outer pipe, and generates an elastic deformation force when correspondingly coupled with the second external pipe. It may include a plurality of slits that are opened to the outside for each of the coupling jaws adjacent to each other to the outside.

At this time, a guide groove through which a guide jaw protruding a predetermined length along the slit is formed to enter and exit the inner surface of the second outer tube corresponding to the slit and corresponding between the adjacent coupling holes is recessed.

In this case, the second movable body may include a plurality of connecting ribs for positioning the central body at the inner center of the second inner hole while forming a flow path for communicating the inner hole of the extension pipe and the inner hole of the water outlet.

At this time, the central body is made of a hollow tube body in which one end corresponding to the extension pipe is opened, and the other end corresponding to the water outlet is closed, and the open end of the central body comes into contact with raw water discharged from the inner hole of the extension tube. It may include an indentation body subjected to hydraulic pressure.

In this case, the inner surface of the second outer tube corresponding to the second movable body may include an annular annular contact rib protruding so as to partially come into contact with one surface of the second movable body elastically supported by the elastic body.

According to the preferred embodiment of the present invention as described above, there are the following effects.

In order to keep the water pressure of raw water supplied from the raw water supply source constant, the moving member moving with respect to the valve housing is divided into a first moving body and a second moving body. Because it is possible to arrange an airtight O-ring by forming an arrangement groove that becomes It is possible to reduce the manufacturing cost by applying a low-cost airtight O-ring to the moving member without needing it.

The material of the valve housing is made of a resin material that can be combined with a mechanical hook rather than an ultrasonic welding method with an end cap, so equipment such as an ultrasonic welding device is unnecessary, and the manufacturing cost of the pressure reducing valve can be reduced.

1 is an external perspective view showing a pressure reducing valve according to an embodiment of the present invention.
2A and 2B are exploded perspective views illustrating a pressure reducing valve according to an embodiment of the present invention.
3 is a cross-sectional perspective view illustrating a pressure reducing valve according to an embodiment of the present invention.
4 is a detailed cross-sectional view showing the bonding structure of the first and second movable bodies and the first airtight O-ring in the pressure reducing valve according to the embodiment of the present invention.
5A and 5B are perspective views illustrating a first valve housing applied to a pressure reducing valve according to an embodiment of the present invention.
6A and 6B are perspective views illustrating a second valve housing applied to a pressure reducing valve according to an embodiment of the present invention.
7A and 7B are perspective views illustrating a first movable body applied to a pressure reducing valve according to an embodiment of the present invention.
8A and 8B are perspective views illustrating a second movable body applied to a pressure reducing valve according to an embodiment of the present invention.
9 is a perspective view illustrating a valve fixture applied to a pressure reducing valve according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment in which a person of ordinary skill in the art to which the present invention pertains can easily practice the present invention will be described in detail. However, in the detailed description of the structural principle of a preferred embodiment of the present invention, if it is determined that a detailed description of a related well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, the same reference numerals are used throughout the drawings for parts having similar functions and functions.

In addition, throughout the specification, when it is said that a part is 'connected' with another part, it is not only 'directly connected' but also 'indirectly connected' with another element interposed therebetween. include In addition, 'including' a certain component does not exclude other components unless otherwise stated, but means that other components may be further included.

As shown in Figs. 1, 2a, 2b and 3, the pressure reducing valve 100 according to a preferred embodiment of the present invention is a water supply pipe (P1) connected to a raw water supply source such as a faucet (not shown), and a water purifier The first valve housing, the second valve housing, the first movable body, and the second are provided between the water outlet pipe P2 connected to the water supply source such as It may include a movable body and an elastic body.

As shown in FIGS. 1, 2a, 2b and 3, the first valve housing 10 communicates through a connecting member such as the inlet pipe P1 and the first fitting part 80 as a medium. It is a cylindrical structure that is detachably coupled to the second valve housing (20).

The first valve housing 10 includes a hollow cylindrical water inlet 11 at one end so as to be coupled with the first fitting 80 to form a passage through which raw water is obtained, and at the other end corresponding to the second valve housing. It includes an extension pipe 12 of a certain length having an internal passage that forms a supply flow path for raw water supplied through the inlet while extending a certain length from the inlet 11 to the water outlet side, while from the boundary area between the inlet and the extension pipe It may include a first outer tube 13 extending outwardly and then extending toward the water outlet in parallel with the outer surface of the extension tube and surrounding the outer side of the extension tube 12 in the circumferential direction.

On the outer surface of the water inlet 11, the first end cap 81 of the first fitting for removably fittingly connecting the water inlet pipe is formed to protrude a first locking protrusion 11a to which the first end cap 81 is hooked, and the first end The cap 81 is provided with a first collet 82 for elastically and in close contact with the outer surface of the inlet pipe (P1), and the inside of the inlet 11 is a first O-ring member for sealing in contact with the outer surface of the inlet pipe. (83).

As shown in FIGS. 4, 5A, and 5B, the extension pipe 12 includes a first inner hole 31 formed through the center of the body of the first movable body 30, and the second movable body 40. The second inner hole 41 formed through the center of the body includes a first extension tube 12a of a predetermined length guided by correspondingly positioned on the outer surface, and has an outer diameter greater than the outer diameter of the first extension tube, and one end of the elastic body It includes a second extension tube 12b that is inserted and disposed, and is formed by a difference in outer diameter between the first extension tube and the second extension tube, and a step 12c that controls the guide movement of the first and second movable bodies 30 and 40. may include

The first outer pipe 13 includes a plurality of coupling holes 24 and elastically formed through one end outer surface of the second outer pipe 23 constituting the second valve housing 20 at regular intervals in the circumferential direction. A plurality of coupling jaws 14 are formed to protrude at regular intervals in the circumferential direction so as to be coupled in a one-to-one correspondence with each other, and are adjacent to each other to generate an elastic deformation force when coupled with the second outer pipe 23 in correspondence with each other. Each of the jaws includes a plurality of slits 15 that are opened outwardly.

At this time, as shown in FIGS. 6A and 6B , the first outer tube 13 includes a guide jaw 16 protruding a predetermined length along the slit 15 , and the guide jaw 16 is When the first valve housing 10 and the second valve housing 20 are coupled to each other correspondingly, the slit is formed to be recessed in the inner surface of the second outer pipe 23 between the adjacent coupling holes. Entering and exiting is guided along the guide groove 26 .

As shown in FIGS. 1, 2A, 2B and 3, the second valve housing 20 is connected to the water outlet pipe P2 and the second fitting part 90 like the first valve housing. It is a cylindrical structure that is connected to each other through a member and is detachably coupled to the second valve housing 20 .

The second valve housing 20 includes a hollow cylindrical water outlet 21 at one end so as to be coupled with the second fitting portion 90 to form a passage through which raw water is discharged, and at the other end corresponding to the first valve housing. Corresponds detachably with the first outer tube 13 to form a space for accommodating the first and second movable bodies and the extension tube by having an outer diameter larger than the outer diameter of the water outlet from the water outlet 21 to the receiving side and extending a certain length. and a second outer tube 23 coupled thereto.

On the outer surface of the water outlet 21, a second locking protrusion 21a to which a second end cap 91 of a second fitting part for detachably fitting and connecting the water outlet pipe is hooked is formed, and the second end The cap 91 has a second collet 92 for elastically and closely fixing the outer surface of the water outlet pipe P2, and a second O-ring member sealing the inside of the water outlet 21 in contact with the outer surface of the water outlet pipe. (93).

The second outer pipe 23 correspondingly coupled to the first valve housing is a coupling formed protruding at one end of the outer surface of the first outer pipe 13 constituting the first valve housing 10 at a predetermined interval in the circumferential direction. A plurality of coupling holes 24 are formed through the outer surface at predetermined intervals in the circumferential direction so as to be elastically coupled to the jaw 14 in a one-to-one correspondence.

The second outer pipe is formed by recessing a guide groove 26 through which a guide jaw 16 protruding along the slit is guided in and out of the inner surface corresponding to the slit between the first valve housing and the second valve housing. During mutual coupling, the guide jaw moves along the guide groove to prevent rotational movement between the valve housings, and the mutual coupling between the coupling hole and the coupling jaw can be performed more simply and accurately.

In addition, the outer surface of the second outer pipe 23 is coupled by a plurality of fastening members 64 and a valve fixture 60 to be described later installed so as to be fixed in the case or fixed installation of a water source such as a water purifier. It may include a fixing boss 29 to be fixed.

As shown in Figs. 2a, 2b, 3, 4 and 7a, 7b, the first movable body 30 has a first inner hole 31 in the center of the body corresponding to the extension tube 12. It is formed through, and an annular ring-shaped first outer jaw 32 is protruded on the outer surface corresponding to the second outer tube 23, so that the second It is a moving structure that moves linearly together with the moving body 40 .

The first movable body 30 is formed with a female screw part 33 in the inner hole so as to be screwed with the male screw part 43 formed on the outer surface of one end of the second movable body 40, so that the second movable body 40 and It is screwed and disposed in the inner space of the second valve housing 20 so that the first inner hole is positioned in the first extension tube 12a of the extension tube 12 .

At this time, one end of the outer surface of the first movable body 30 corresponding to the first valve housing 10 is made of a hexagonal body having a flat surface to facilitate rotation operation when screwing and disassembling the second movable body 40 desirable.

In addition, the material of the first and second valve housings in contact with raw water does not need to be applied to the ultrasonic welding method using equipment such as an ultrasonic welding device such as polyacetal (POM) or polyketone (POK), a simple mechanical hook bonding method Therefore, it is preferable to be made of a resin material such as polypropylene (PP) so that the end cap and corresponding coupling are possible.

As shown in Figs. 2a, 2b, 3, 4 and 8a, 8b, the second movable body 40 has a second inner hole 41 in the center of the body corresponding to the extension tube 12. First and second valve housings that are formed through, protrude an annular second outer jaw 42 on an outer surface corresponding to the second outer tube, and are screwed with the first movable body 30 to be mutually coupled By being disposed in the inner space of the first and second valve housings, it is a moving structure that moves linearly along with the first moving body 30 along the extension pipe 12 when the pressure of raw water is irregular in the inner space of the valve housing.

The second movable body 40 communicates with the inner hole of the extension pipe 12 and the inner hole of the water outlet 21 on the water outlet side of the second inner hole 41 to form a flow path through which raw water passes. 2 It may include a plurality of connecting ribs 44 for fixing the cylindrical central body 46 in place in the inner center of the inner hole (41).

At this time, the central body 46 is made of a hollow tube body whose other end corresponding to the water outlet 21 is sealed, and the extension tube 12 has an end of the central body 46 that is opened facing the extension tube 12 . It may include a press-fit body 47 that receives water pressure while colliding with raw water discharged from the inner hole of the.

A protrusion rib (47a) is formed to protrude in the longitudinal direction so as to be in close contact with the inner surface of the central body (46) on the outer surface of the press-in body (47), and at the other closed end of the central body (46), the press-in body is formed. When assembling the press-fitting step (47), it is preferable to form a through-hole for exhausting the air remaining in the inner space of the central body to the outside.

As shown in FIGS. 2A, 2B, 3 and 4, the elastic body 50 includes a first external jaw 32 of the first movable body 30 integrally assembled with the second movable body 40 and The second movable body assembled with the first movable body is inserted into the extension pipe 12 so that one end is in contact with the bottom surface of the first outer pipe 13 of the first valve housing 10 and the other end is in contact with the water outlet 21 ) to support it elastically.

The elastic body 50 is illustrated and described as being provided in the form of a coil spring, but is not limited thereto, and elastic restoring force that elastically supports the first and second movable bodies coupled to each other from the inner space of the first and second valve housings toward the water outlet. It can be applied by selectively using various types of elastic members that provide

And, the inner surface of the second outer tube 23 corresponding to the second movable body 40 elastically supported toward the water outlet 21 by the elastic body 50 is partially in contact with or spaced apart from one surface of the second movable body. It may include an annular ring-shaped contact rib 28 that is protruded to reduce impact force and resistance during operation.

Accordingly, the elastic body 50 is mutually coupled by the pressure of the raw water introduced through the inlet 11, and when the integrated first and second movable bodies 30 and 40 move toward the inlet 11, it elastically supports it. and the elastic force of the elastic body serves to buffer the pressure of raw water introduced inside through the extension pipe of the first valve housing and supplied to the outlet.

Meanwhile, between the end of the first movable body 30 penetrating the first internal hole 31 and the end of the second movable body 40 penetrating the second internal hole 41, the first By forming an annular ring groove in which at least one first airtight O-ring 35 is disposed when the movable body and the second movable body are coupled, the first hermetic O-ring 35 is connected to the first extension pipe 12a of the extension tube 12 . ) Assembly between the inner surfaces of the first and second inner holes of the first and second movable bodies guided and moved along the first extension tube 12a of the extension tube 12 while being in close contact with the outer surface and the outer surface of the first extension tube Leakage can be prevented by perfectly sealing the gap that occurs in the area.

In addition, a first outer jaw 32 protruding in an annular shape from the outer surface of the first movable body 30 and a second outer jaw protruding in an annular annular shape from the outer surface of the second movable body 40 are formed. (42) by forming another annular ring groove in which at least one second sealing O-ring 45 is disposed when the first movable body and the second movable body are coupled, the second hermetic O-ring 45 is The first and second outer jaws of the first and second movable bodies moving along the inner surface of the second outer tube while being in close contact with the inner surface of the second outer tube of the second valve housing and the inner surface of the second outer tube It is possible to prevent water leakage by completely sealing the gap that occurs in the assembly part between them.

Accordingly, when the first and second movable bodies are mutually coupled, ring grooves are formed in which the first and second airtight O-rings 35 and 45 are respectively disposed on the outer surfaces of the first and second movable bodies, which are movable members that are moved during decompression. It is not necessary to form a complicated mold parting line for the installation of an airtight O-ring, so manufacturing costs can be reduced.

And, it may include a valve fixing body 60 for fixing the position of the first and second valve housings coupled to accommodate the first and second movable bodies and the elastic body inside a fixed installation such as a case of a water supply source such as a water purifier.

As shown in FIGS. 2A, 2B and 9, the valve fixing body 60 is formed on both outer surfaces of the second valve housing 20 by a fixing boss 29 and a fastening member 64. It may include a base 61 formed through a fastening hole 62 to be fastened through and having a seating groove in which the second outer tube 23 of the second valve housing 20 is seated.

A bottom surface of the seating groove of the base 61 includes a cutout 65 that is cut to expose a portion of the body of the second outer tube 23 to the outside, and is seated in the seating groove in the base 61 It is preferable to protrude the outer surface of the second outer tube 23 and the locking jaw 61a for generating the locking force.

Fitting pieces may be provided on both sides of the base 61 of the valve fixture 60 so that it can be easily fitted and fixed to a fixed installation.

By installing the pressure reducing valve having the above configuration between the inlet pipe and the outlet pipe, the first and second movable bodies coupled to the inside of the first and second valve housings by the pressure of the raw water obtained through the inlet pipe are of the extension pipe. The raw water is decompressed while temporarily moving along the first extension pipe.

At this time, the first airtight O-ring disposed in the ring groove formed between the end of the first movable body forming the first inner hole and the end of the second movable body forming the second inner hole is the first of the extension tube. Perfectly seals a gap occurring at the assembly site between the inner surfaces of the first and second internal holes of the first and second movable bodies that are guided and moved along the first extension tube while moving in contact with the outer surface of the extension tube and the outer surface of the first extension tube In this way, leakage of raw water can be prevented.

In addition, as the second airtight O-ring disposed in another ring groove formed between the first outer jaw of the first movable body and the second outer jaw of the second movable body is moved in contact with the inner surface of the second outer tube, the It is possible to prevent leakage of raw water by completely sealing a gap occurring at the assembly site between the first and second movable bodies moving along the inner surface of the second outer tube and the inner surface of the second outer tube.

The present invention described above is not limited by the above-described embodiments and the accompanying drawings, and it is common in the technical field to which the present invention pertains that various substitutions, modifications and changes can be made within the scope without departing from the technical spirit of the present invention. It will be clear to those who have the knowledge of

10: first valve housing
11: intake port 13: first exterior building
14: coupling jaw 15: slit
20: second valve housing
21 : exit 23 : 2nd exterior building
24: coupling hole 26: guide groove
30: first mobile body
31: first internal hole 32: first external jaw
33: female thread part 35: O-ring for the first airtightness
40: second mobile
41: second inner hole 42: second outer jaw
43: male thread 44: connecting rib
46: central body 47: press-fit body
50: elastic body 60: valve fixing body

Claims (7)

A first valve having an extension pipe of a certain length extending a certain length from the inlet port where raw water is obtained to the outlet side, and having a first outer tube surrounding the outer side of the extension tube in the circumferential direction to communicate with the inlet pipe and the first fitting part as a medium housing ;
A second outer pipe extending from the water outlet through which raw water is discharged toward the first outer pipe and removably correspondingly coupled to the first outer pipe to form an inner space of a certain size for accommodating the extension pipe inside is provided, the water outlet pipe and the second pipe a second valve housing connected in communication with the second fitting;
A first inner hole is formed through the center of the body corresponding to the extension tube, and a first outer jaw is formed to protrude on an outer surface corresponding to the second outer tube, in the space between the first valve housing and the second valve housing. A first movable body that is linearly moved along the arranged extension pipe;
A second inner hole is formed through the center of the body corresponding to the extension tube, and a second outer jaw is formed to protrude on an outer surface corresponding to the second outer tube, and is combined with the first movable body and is combined with the first movable body. a second movable body moving along the extension pipe; and
and an elastic body disposed in the extension tube so that one end of the first movable body assembled with the second movable body is in contact with the first outer tube and the other end is in contact with the first movable body and the second movable body to elastically support the first movable body and the second movable body toward the water outlet. ,
The first outer tube protrudes a plurality of coupling jaws that are elastically one-to-one correspondingly coupled to a plurality of coupling holes formed through the second outer tube, and generate elastic deformation force upon corresponding coupling with the second outer tube. It includes a plurality of slits that are opened outwardly between adjacent coupling jaws,
A first airtight O-ring in contact with the outer surface of the extension pipe is disposed between the end of the first movable body penetrating the first internal hole and the end of the second movable body penetrating the second internal hole, By disposing a second airtight O-ring in contact with the inner surface of the second outer tube between the first and second outer jaws, the extension tube and the first, A pressure reducing valve that seals the assembly part between the two internal constructions by the first airtight O-ring, and seals the assembly part between the second outer pipe and the first and second outer protruding jaws by the second airtight O-ring. The method according to claim 1,
The extension tube includes a first extension tube of a predetermined length through which a first inner hole and a second inner hole formed through the center of each body of the first movable body and the second movable body are positioned to correspond to the outer surfaces, respectively, and the outer diameter of the first extension tube is greater than that of the first extension tube. A pressure reducing valve comprising a second extension tube having a large outer diameter and having one end of the elastic body inserted therein, and a step formed by a difference in outer diameters of the first extension tube and the second extension tube. delete The method according to claim 1,
In the inner surface of the second outer tube corresponding to the slit and between the adjacent coupling holes, a guide groove protruding a predetermined length along the slit is recessed to form a guide groove for guiding in and out. The method according to claim 1,
The second movable body includes a plurality of connecting ribs for fixing the central body at the inner center of the second inner hole while forming a flow path for communicating the inner hole of the extension pipe and the inner hole of the water outlet. 6. The method of claim 5,
The central body has an open end corresponding to the extension pipe and a closed hollow tube body at the other end corresponding to the water outlet, and at the open end of the central body, the water pressure is applied while colliding with raw water discharged from the inner hole of the extension pipe. A pressure reducing valve comprising a receiving press-fitting body. The method according to claim 1,
and an annular annular contact rib protruding from an inner surface of the second outer tube corresponding to the second movable body to partially come into contact with one surface of the second movable body elastically supported by the elastic body.

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