WO2016024708A1 - Valve assembly having provided bypass channel, and pressure regulator, for air respirator, having same - Google Patents

Abstract

The present invention relates to a valve assembly comprising: a connecting tube body having formed therein a channel so as to guide the air that is supplied through an air supply tube to an air discharge tube; a decompression valve, provided on the channel formed in the connecting tube body, for regulating the pressure of the air that is supplied through the air supply tube and discharge same through the air discharge tube; a bypass channel which is branched at a channel connecting the air supply tube and the decompression valve, bypasses the decompression valve, and is connected to the air discharge tube; and a plug unit, provided on the channel connecting the air supply tube and the decompression valve, for controlling the opening and closing of the bypass channel on the basis of the advancing and retreating movement. Therefore, during malfunction of the decompression valve, the air supplied through the air supply tube can be quickly bypassed through the bypass channel and supplied to the air discharge tube.

Description

Valve assembly with bypass flow path and air regulator with same

The present invention relates to a valve assembly provided with a bypass passage provided in an air respirator worn by a wearer for breathing in a fire site or a toxic gas spraying region, and a pressure regulator for an air respirator having the same.

In general, an air respirator inhales poisonous gases at a work site such as an industrial site where harmful gases and dust are generated, an oxygen-deficient site such as a manhole or a manhole, and a fire site. It is used to prevent and prevent breathing.

The air respirator has a configuration in which a supply pipe and an exhaust pipe are connected to a mask, and fluid stored in the fluid storage tank is supplied into the mask through the supply pipe, and exhalation generated by the wearer's breath is discharged through the exhaust pipe to the outside. Have

In such an air respirator, a pressure regulator is provided to control the high pressure of the fluid supplied through the air supply pipe. The pressure regulator is composed of a pressure reducing valve for controlling the amount of fluid flowing into the mask.

For example, Korean Patent No. 903409 discloses a supply valve assembly for a respirator. However, in the above patent, when the opening / closing operation by the positive pressure valve is not normally performed due to mechanical damage or the like, there is a problem in that air cannot be smoothly supplied into the mask.

The present invention is to solve the above-mentioned problems of the prior art, the valve assembly provided with a bypass flow path which can bypass the air supplied through the supply pipe in the case of a breakdown of the pressure reducing valve can be supplied into the mask of the air ventilator and the air having the same The purpose is to provide a pressure regulator for the respiratory system.

According to the technical idea of the present invention for achieving the above object, the connection pipe body formed therein so as to guide the air supplied through the air supply pipe to the exhaust pipe, and is installed on the flow path formed in the connection pipe Pressure reducing valve for controlling the pressure of the air supplied through the engine and discharged to the exhaust pipe, branched in the flow path connecting the supply pipe and the pressure reducing valve, bypass bypass pressure reducing valve connected to the exhaust pipe and decompression with the supply pipe It is achieved by the valve assembly characterized in that it comprises a plug unit which is installed in the flow path connecting the valve to control the opening and closing of the bypass flow path in accordance with the movement forward and backward.

Here, the plug unit is moved forward and backward toward the inlet of the bypass flow passage branched from the flow path connecting the air supply pipe and the pressure reducing valve, the plug opening and closing the inlet of the bypass flow passage, connected to the plug and connected to the air supply pipe It is preferable to include a stem extending to one side of the connecting tube and the knob formed on the free end of the stem to be operated by the wearer.

In addition, the plug and stem are preferably matched by a concave-convex structure capable of synchronous rotation about the axis and relatively movable in the axial direction.

In addition, the plug unit moves forward and backward toward the inlet of the bypass flow passage branched from the flow passage connecting the air supply pipe and the pressure reducing valve to open and close the inlet of the bypass flow passage and the air flowed from the air supply pipe into the pressure reducing valve therein. A hollow plug for guiding exhaust holes, and an inlet hole connected to the hollow plug and extending to one side of a connecting pipe connected to the air supply pipe, and guiding air introduced from the air supply pipe to the exhaust hole of the hollow plug therein; The hollow stem is installed on the outer circumferential surface of the hollow stem, the rotary ring is formed at the free end of the hollow stem and the rotary ring which communicates with the air supply pipe and guides the air introduced through the air supply pipe to the inlet hole of the hollow stem. It is preferable to include a knob.

In addition, the hollow plug and the hollow stem is preferably matched by a concave-convex structure capable of synchronous rotation around the axis and relatively movable in the axial direction.

In addition, it is preferable that the hollow plug has a sealing member coupled to an end surface of one end thereof, and a sealing member is sealed between the end surface and the seating surface.

The plug or the hollow plug is threadedly coupled to the flow path connecting the air supply pipe and the pressure reducing valve to move forward and backward according to the rotation of the plug or the hollow plug to open and close the inlet of the bypass flow path.

On the other hand, in another technical idea of the present invention for achieving the above object, it is achieved by a pressure regulator for an air respirator including a valve assembly provided with a bypass flow path.

According to the valve assembly provided with a bypass flow path according to the present invention, when the pressure reducing valve is broken, the air supplied through the supply pipe can be quickly bypassed through the bypass flow path and supplied to the exhaust pipe.

In addition, when the valve assembly of the present invention is applied to the pressure regulator for the air respirator, even if the pressure reducing valve is inoperable, the air can be supplied into the mask through the bypass passage, thereby preventing safety accidents due to the blockage of the pressure reducing valve. have.

1 is a conceptual diagram showing a valve assembly according to the present invention.

2 is a cross-sectional perspective view of a valve assembly according to the present invention.

3 is a cross-sectional perspective view showing an operating state of the valve assembly according to the present invention.

Figure 4 is a cross-sectional perspective view showing a pressure regulator for the respirator having a valve assembly according to the present invention.

5 is an enlarged view of a portion A of FIG. 4.

6 is a cross-sectional view showing a pressure regulator for an air respirator having a valve assembly according to the present invention.

7 and 8 are partially enlarged cross-sectional view showing an operating state of the pressure regulator for the air respirator having a valve assembly according to the present invention.

<Description of the code>

1: valve assembly 2: case

5 pressure reducing valve 7 diaphragm

9: link assembly 11: drive link

13: original link 15: electric link

19: vent 20: plug unit

22: hollow plug 22a: exhaust hole

24: hollow stem 24a: inlet hole

25: rotary ring 28: vent hole

26 knob 31 valve case

32: bypass flow path 33: valve body

34: slot groove 35: elastic body

36: date projection 37: reaction force control handle

38: sealing ring 39: sealing body

45: vent 48: connector

49: seating surface 51: poppet

53 head 55 valve seat

57: opening 61: hydraulic projection

63: protrusion 81: pressing projection

122: plug 124: stem

126 knob K: air supply pipe

P: exhaust pipe

The terms or words used in this specification and claims are not to be construed as being limited to the common or dictionary meanings, and the inventors can appropriately define the concept of terms in order to explain their invention in the best way. Based on the principle, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

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

1 is a conceptual diagram showing a valve assembly according to the present invention. Referring to the drawings, the valve assembly 1 according to the present invention comprises a connecting pipe 48, the air supply pipe (H) and the exhaust pipe (P) formed with a flow path connecting the air supply pipe (H) and the exhaust pipe (P). Bypass the pressure reducing valve (5) and the pressure reducing valve (5) installed in the flow path to connect the bypass passage (32) and the bypass passage (32) for connecting the air supply pipe (H) and the exhaust pipe (P). It is composed of a plug unit (20).

In other words, the connecting pipe 48 forms a flow path therein to guide the fluid supplied through the air supply pipe H to the exhaust pipe P. On one side and the other side of the connecting pipe 48, respectively, the air supply pipe ( H) and the exhaust pipe (P) are provided so that the fluid supplied through the air supply pipe (H) is guided to the exhaust pipe (P) along the flow path of the connecting pipe (48).

In addition, a pressure reducing valve 5 is installed in a flow path formed in the connecting pipe 48 to connect the air supply pipe H and the exhaust pipe P, and the pressure reducing valve 5 is configured to control the flow of fluid introduced into the air supply pipe H. The pressure is adjusted to guide the exhaust pipe (P).

In addition, a bypass flow path 32 is formed in the connecting pipe 48 to connect the air supply pipe H and the exhaust pipe P by bypassing the pressure reducing valve 5, and the bypass flow path 32 is the air supply pipe H. ) Branched from the flow path connecting the pressure reducing valve (5) and connected to the exhaust pipe (P), if the pressure reducing valve (5) is inoperable, the air supplied to the connecting pipe (48) through the air supply pipe (H) exhaust pipe ( You will be guided to P).

On the other hand, the flow path connecting the air supply pipe (H) and the pressure reducing valve (5) is provided with a plug unit 20 for controlling the opening and closing of the bypass flow path (32). The plug unit 20 is provided at a portion where the bypass flow path 32 branches on the flow path connecting the air supply pipe H and the pressure reducing valve 5 so that the plug unit 20 is inoperable. The bypass flow path 32 is opened to guide the fluid introduced into the air supply pipe H to the exhaust pipe P.

On the contrary, when the pressure reducing valve 5 is in normal operation, the plug unit 20 closes the bypass flow path 32 so that the pressure reducing valve 5 receives the fluid supplied to the connecting pipe 48 through the air supply pipe H. The pressure is adjusted to guide the exhaust pipe (P).

In this way, the plug unit 20 for intermittent opening and closing of the bypass flow path 32 moves forward and backward on the flow path connecting the air supply pipe H and the pressure reducing valve 5 to open and close the bypass flow path 32. To this end, the plug unit 20 is threadedly coupled to the inner circumferential surface of the flow path to move forward and backward according to the rotation of the plug unit 20 to open or close the inlet of the bypass flow path 32.

The plug unit 20 has a different structure depending on the inlet of the bypass passage 32 branched from the flow passage of the connection pipe 48 or the connection position of the air supply pipe H and the connection pipe 48.

For example, as shown in FIGS. 2 and 3, an inlet of the bypass passage 32 branching from the passage formed in the connecting pipe 48 is provided on the seating surface 49 facing the inner end of the plug unit 20. When formed, the plug unit 20 is connected to the plug 122 and the plug 122 installed in the flow path connecting the air supply pipe (H) and the pressure reducing valve (5) and connected to the air supply pipe (H) ( It consists of a stem 124 extending to one side of the 48 and a knob 126 formed on the stem 124 extending to one side of the connecting tube 48 and operated by a user.

At this time, the plug 122 opens the air supply pipe (H) and the pressure reducing valve (5) to open and close the inlet of the bypass flow path (32) branched from the flow path connecting the air supply pipe (H) and the pressure reducing valve (5). It is inserted into the connecting passage. The plug 122 has a shape corresponding to the flow path. For example, when the flow path connecting the air supply pipe H and the pressure reducing valve 5 has a circular shape, the plug 122 may be formed in the shape of the flow path. It has a cylindrical shape so as to be able to move forward and backward to control the opening and closing of the bypass flow path 32 in accordance with the forward and backward movement of the plug 122.

In addition, the plug 122 is screwed into the flow path connecting the air supply pipe (H) and the pressure reducing valve (5) to open and close the inlet of the bypass flow path 32 by moving forward and backward according to the rotation. That is, the male screw portion is machined on the outer circumferential surface of the inner end portion of the plug 122, whereby the plug 122 is screwed with the female screw portion machined on the inner circumferential surface of the connecting pipe 48.

Therefore, the plug 122 may rotate forward or backward while being rotated with respect to the connector body 48. Thus, since the plug 122 is screwed to the connecting pipe 48, the operation of closing or opening the bypass flow path 32 can be performed more precisely.

In this way, the plug 122 inserted into the flow path connecting the air supply pipe H and the pressure reducing valve 5 to open and close the inlet of the bypass flow path 32 is connected to the stem 124. Extends to one side of the connector (48) connected to the engine (H).

In addition, the stem 124 extending to one side of the connector 48 is formed with a knob 126 that is operated by the user, wherein the knob 126 is protruded to one side of the connector 48 to facilitate the user. The knob 126 can be gripped.

When the plug unit 20 has the structure as described above, the plug 122 is rotated by a user's manipulation through the knob 126. As shown in FIG. 2, when the plug 122 is rotated forward, the plug ( 122 moves toward the seating surface 149 of the connecting pipe 48 so that the inner end of the plug 122 is in close contact with the seating surface 49 so that the fluid is supplied to the pressure reducing valve 5 without leakage.

On the contrary, when the pressure reducing valve 5 becomes inoperable as shown in FIG. 3, the flow path formed inside the connecting pipe 48 is blocked, and the fluid supplied through the air supply pipe H is reduced in pressure reducing valve 5. Will not move to). When the plug 122 rotates in this state, the plug 122 moves away from the seating surface 49 of the connector 48 so that a gap is formed between the seating surface 49 and the inner end of the plug 122. Is formed.

When a gap is generated between the seating surface 49 of the connecting pipe 48 and the inner end of the plug 122, the inlet of the bypass passage 32 formed on the seating surface 49 of the connecting pipe 48 is opened. Accordingly, the fluid supplied through the air supply pipe (H) flows through the inlet of the bypass flow path (32) to the exhaust pipe (P) so that even if the pressure reducing valve (5) becomes inoperable, the air supply pipe ( The fluid supplied through H) may be bypassed to the bypass flow path 32 to be supplied to the exhaust pipe P.

In addition, the stem 124 is configured to synchronously rotate about the axis of the plug 122 with the plug 122 so as to transmit the rotational force of the knob 126 to the plug 122. For example, it can be matched by the uneven structure to allow relative movement in the direction.

In addition, the knob 126 is a portion that is held by the hand when the stem 124 is to be rotated, and is coupled to the outer end of the stem 124. Thus, the wearer can grasp this knob 126 and rotate the stem 124 as needed.

On the other hand, the inlet position of the bypass flow path 32 branched from the flow path of the connecting pipe 48 is formed on the inner circumferential surface of the flow path connecting the air supply pipe H and the pressure reducing valve 5 as shown in FIG. When the H is connected to the plug unit 20 and the fluid supplied through the air supply pipe H passes through the plug unit 20, the fluid supplied from the air supply pipe H is connected to the plug unit 20 by a pressure reducing valve ( 5) Or a hollow is formed to guide the bypass flow path (32).

Thus, the plug unit 20 is hollow is formed of a hollow plug 22, hollow stem 24, rotary ring 25, knob 26. In other words, the hollow plug 22 is formed therein with an exhaust hole 22a for guiding the fluid supplied from the air supply pipe H to the pressure reducing valve 5. The hollow plug 22 having the exhaust hole 22a and the air supply pipe H can open and close the inlet of the bypass flow path 32 branched from the flow path connecting the air supply pipe H and the pressure reducing valve 5. It is inserted into the flow path connecting the pressure reducing valve (5).

At this time, the hollow plug 22 is screwed into the flow path connecting the air supply pipe (H) and the pressure reducing valve (5) to open and close the inlet of the bypass flow path (32) by moving forward and backward as the hollow plug 22 is It may rotate forward or backward with respect to the connector body (48). As such, when the hollow plug 22 is screwed to the connecting pipe 48, the operation of closing or opening the bypass flow path 32 may be performed more precisely.

As such, the hollow plug 22 inserted into the flow path connecting the air supply pipe H and the pressure reducing valve 5 to open and close the inlet of the bypass flow path 32 is connected to the hollow stem 24, in which the hollow plug ( 22) and the hollow stem 24 are matched by a concave-convex structure capable of synchronous rotation about the axis and relative movement in the axial direction.

In addition, the hollow stem 24 has an inlet hole 24a formed to guide the fluid introduced from the air supply pipe H to the exhaust hole 22a of the hollow plug 22, and the outer end of the hollow stem 24 is It extends to one side of the connector (48) is a part of the protruding out of the connector (48).

In addition, the hollow stem 24 is provided with a rotary ring 25 to receive the fluid from the air supply pipe (H) through the plug unit 20, the rotary ring 25 to the outside of the connecting pipe 48 It is installed on the outer circumferential surface of the protruding hollow stem 24. The rotary ring 25 is connected to the air supply pipe (H) to guide the fluid supplied through the air supply pipe (H) to the inlet hole (24a) of the hollow stem (24).

In addition, the hollow stem 24 protruding to one side of the connector 48 is formed with a knob 26 that is operated by the user, and the knob 26 is protruded to one side of the connector 48 so that the user is easy. The knob 26 can be gripped.

The valve assembly 1 having the structure as described above has the plug unit 20 of the plug unit 20 when the pressure reducing valve 5 does not flow to the exhaust pipe P through the pressure reducing valve 5 due to a failure or the like. By the operation, the bypass flow path 32 is opened to guide the fluid supplied through the air supply pipe H to the exhaust pipe P.

On the other hand, the valve assembly 1 according to the present invention can be applied to the pressure regulator for the respirator. This will be described based on FIGS. 4 to 8.

4 is a sectional perspective view showing a pressure regulator for an air respirator having a valve assembly according to the present invention, FIG. 5 is an enlarged view of a portion A of FIG. 4, and FIG. 6 is for an air respirator having a valve assembly according to the present invention. Cross section showing pressure regulator.

Referring to the drawings, the air regulator pressure regulator according to the present invention makes it easy to breathe by adjusting the pressure of the fluid supplied into the mask worn by the lifeguards, firefighters and the like.

In other words, the pressure regulator for the respirator according to the present invention is a valve assembly (1) provided with the bypass flow passage described above, and the pressure reducing valve (5) installed in the valve assembly (1) to change the positive pressure inside the pressure regulator according to the wearer's breathing Diaphragm (7) for switching to the operating source of the linkage, link assembly (9) and valve assembly (1), diaphragm (9) for switching the reciprocating motion generated by the contracted expansion of the diaphragm (7) to the operation of the pressure reducing valve (5). 7) and a casing 2 to which the link assembly 9 is mounted.

The pressure reducing valve 5 of the valve assembly 1 is installed adjacent to the exhaust pipe P and serves to reduce the pressure of the fluid supplied through the air supply pipe H. The pressure reducing valve 5 is installed in the exhaust pipe P so as to stand up toward the diaphragm 7. The pressure reducing valve 5 is configured to open the exhaust pipe P when the pressure of the fluid supplied through the air supply valve 20 is larger than the pressure applied to the exhaust pipe P.

In particular, when the external force for opening the pressure reducing valve 5 disappears, the flow path of the fluid is automatically reduced by its elasticity, and does not open itself until the air pressure of the air supply valve 20 rises above a certain level. For example, the pressure reducing valve 5 includes a valve case 31, a valve body 33, and an elastic body 35.

The valve case 31 forms a flow path leading from the air supply valve 20 to the exhaust pipe P. The valve case 31 is formed in a cylindrical shape of two stages, and has a large diameter portion and a small diameter portion. The poppet 51 of the valve body 33 is disposed in the small diameter portion, and the head 53 of the valve body 33 is disposed in the large diameter portion. The small diameter portion is formed with a vent hole 45 in communication with the air supply valve (20). On the inner circumferential surface of the large diameter portion, a valve seat 55 on which the head 53 of the valve body 33 is seated is formed.

The valve body 33 is attached to and detached from the valve seat 55 while reciprocating inside the valve case 31, whereby the flow rate of air is controlled while the opening degree of the flow path is adjusted. The poppet 51 of the valve body 33 has a hydraulic pressure projection 61 projecting outward through the opening 57 of the valve case 31. A protrusion 63 for sealing the opening 57 is formed below the hydraulic protrusion 61.

The elastic body 35 is a repulsion means for pressing the valve body 33 as described above in the valve closing direction. The elastic body 35 is provided between the reaction force adjusting handle 37 and the valve body 33. That is, the elastic body 35 is supported on the inner circumferential surface of the valve case 31 to elastically pressurize the valve body 33, thereby bringing the valve body 33 into close contact with the valve seat 55 when the valve is closed. Accordingly, the elastic body 35 has a return spring (not shown) and an arbitrary open position of the linkage assembly 9 which pressurizes the valve body 33 when the external force for opening the pressure reducing valve 5 is removed to become a no load state. To balance power.

On the other hand, the diaphragm 7 is a means for switching the positive pressure change inside the pressure regulator according to the wearer's breath to the operating source of the pressure reducing valve (5). The diaphragm 7 contracts and expands according to the exhalation and inhalation of the wearer entering and exiting the positive pressure space inside the pressure regulator through the exhaust pipe P, thereby reducing the pressure reducing valve 5 through the link assembly 9 connected to the hydraulic pressure surface. To operate.

The link assembly 9 is a means for converting the reciprocating motion generated by the contracted expansion of the diaphragm 7 into the operation of the pressure reducing valve 5. The link assembly 9 is connected between the pressure reducing valve 5 and the pressure receiving surface of the diaphragm 7 to operate in accordance with the contraction and expansion of the diaphragm 7 to adjust the opening degree of the pressure reducing valve 5.

The link assembly 9 includes a drive link 11, a motive link 13, and an electric link 15. The drive link 11 is a link body for directly operating the pressure reducing valve 5 and is hingedly coupled to the valve body 33.

Therefore, the drive link 11 pivotally rotates about the hinge axis by the pressing force transmitted from the electric link 15 to pressurize or release the valve body 33, and to increase the opening degree of the pressure reducing valve 5 during pressurization and release. Lower the opening. Such a drive link 11 has a pressurizing protrusion 81 which is in contact with the hydraulic projection 61 of the valve body 33 so as to pressurize the valve body 33 directly.

In addition, the motive link 13 is a link body which mediates the lifting and lowering of the diaphragm 7 according to shrinkage expansion by the operation of the link assembly 9. One end of the motive link 13 is connected to the hydraulic pressure surface of the diaphragm 7, and the other end is connected to the drive link 11 through the electric link 15, respectively. Accordingly, the motive link 13 presses or releases the drive link 11 through the electric link 15 while reciprocating together as the diaphragm 7 contracts and expands.

In addition, the electric link 15 is a link body which transmits the reciprocating motion of the motive link 13 by the diaphragm 7 to the drive link 11. The electric link 15 is located between the drive link 11 and the motive link 13.

The valve assembly 1 includes a connecting pipe 48, a pressure reducing valve 5, a bypass flow path 32, and a plug unit 20, and the plug unit 20 includes a hollow plug 22 and a hollow stem ( 24), rotary ring 25 and knob 26. The hollow plug 22 is a pipe that guides the fluid introduced through the air supply pipe (H) to the pressure reducing valve (5).

The hollow plug 22 is a shut-off valve for opening the bypass flow path 32 in an emergency in which the pressure reducing valve 5 becomes inoperable and the flow path connecting the pressure reducing valve 5 and the exhaust pipe P is closed. Also serves as a role.

To this end, the hollow plug 22 is a male threaded portion is processed on the outer peripheral surface of the inner end portion, the screw threaded to the female threaded portion machined on the inner peripheral surface of the connecting pipe 48 is capable of screw movement in the axial direction.

This, the hollow plug 22 is rotated by the wearer's operation through the knob 26, as shown in Figure 6, in the forward rotation to move inwards in close contact with the seating surface 49 of the connector (48). This allows the fluid to be supplied to the pressure reducing valve 5 without leakage.

On the contrary, as shown in FIG. 7, when the pressure reducing valve 5 is clogged, a predetermined clearance is formed between the seating surface 49 by turning back and moving outward. Accordingly, the fluid stagnated in the hollow plug 22 is bypassed through the bypass flow path 32 of the connecting pipe 48 and directly supplied to the exhaust pipe P.

The hollow stem 24 is a part connecting the knob 26 and the hollow plug 22 to rotate the hollow plug 22 from the outside. The hollow stem 24 is coupled to the outer end of the hollow plug 22. The hollow stem 24 is connected to the air supply pipe (H) through the rotary ring 25 to supply the fluid to the hollow plug 22.

And, the inner end of the hollow stem 24 is inserted into the flow path formed in the connecting body through one side of the connecting pipe is coupled to the outer end of the hollow plug 22, the outer end of the hollow stem 24 to the knob 26 Is coupled, the rotary ring 25 is coupled to the middle portion.

As such, the hollow stem 24 is synchronously rotated about the hollow plug 22 and the axis in order to transmit the rotational force of the knob 26 to the hollow plug 22, and at the same time the hollow plug ( It is matched by the uneven structure to allow relative movement in the axial direction with respect to 22).

Such uneven structure is the simplest form of the coupling structure that enables the simultaneous rotation and relative movement as described above, consisting of a straight groove 34 and the projections 36, in addition to the various uneven structures can be applied. .

Here, the slot 34 is formed to be inserted in a straight line along the diameter on the outer end end surface of the hollow plug 22, the insertion projection 36 is to be inserted. In addition, the protrusions 36 are protruded along the diameter on the inner end end surface of the hollow stem 24, the mating grooves 34 are matched. At this time, since the protrusions 36 should secure the conduit through which the fluid flows in the central portion, the straight protrusions 36 take the shape of a cut straight line without substantially the middle portion.

On the other hand, the hollow plug 22 is a valve for opening and closing the bypass flow path 32 of the fluid, the shape of the inner end end surface 40 in contact with the seating surface 49 of the connecting pipe 48 can be variously changed. In addition, the seating surface 49 and the end surface 40 may be sealed by various types of sealing members.

That is, the hollow plug 22 serves as a fluid pipeline in a normal state, but in an emergency in which the pressure reducing valve 5 is closed, the bypass passage 32, that is, the vent hole 32 of the connecting pipe 48 is opened. It acts as an opening and closing valve to seal between the end surface 40 and the connecting body 48 seating surface 49 to close the bypass passage 32 in the normal state.

To this end, the end surface 40 of the hollow plug 22 may be formed to be inclined to protrude in a conical shape, at this time, the seating surface 49 may have a structure that is mutually matched by being recessed in a conical shape in response to the end surface (40). have. In particular, in this structure, the hollow plug 22 can more closely maintain the sealing between the seating surface 49 by fitting the sealing ring 38 to its end face 40.

In addition, the hollow plug 22 may be inserted coaxially with the sealing tube (39) at the inner end. The sealing tube 39 is inserted into the hollow plug 22, and is a tubular hollow cylinder that forms a through hole so as not to interfere with the flow of the fluid, it is made of a high elastic rubber or plastic material.

Therefore, the sealing tube 39 is projected inward from the inner end of the sealing tube 39, as shown, and abuts on the seating surface 49 of the connecting tube 48, the hollow plug 22 in the normal state And seal between the connector and the connector body 48. At this time, the connecting tube 48 is formed in a shape corresponding to the end of the sealing tube 39 as shown above, the seating surface 49 is in close contact with the end of the sealing tube (39). Thus, the sealing tube 39 is in close contact with the seating surface 49 to seal.

The rotary ring 25 is an intermediary means for connecting the air supply pipe H to the hollow stem 24, and is rotatably mounted on the outer circumferential surface of the hollow stem 24 at the end of the air supply pipe H in the circumferential direction. Therefore, the rotary ring 25 is rotatably coupled while maintaining the state in which the air supply pipe (H) is fluidly connected to the end of the hollow stem (24).

To this end, the rotary ring 25 is convex to secure a communication space between the hollow stem 24, a plurality of vent holes 28 on the wall surface of the hollow stem 24 to which the rotary ring 25 is wound. ) Is formed.

The knob 26 is a portion that is held by the hand when the hollow stem 24 is to be rotated. The knob 26 is coupled to the outer end of the hollow stem 24 so that the wearer may grasp the knob 26 as needed and the hollow stem 24 may be rotated. Can be rotated.

On the other hand, as described above, the connecting pipe 48 to which the hollow plug 22 is coupled has a bypass flow path 32 formed on one side of the outer wall so as to be opened to the inner space leading to the exhaust pipe P. Therefore, when the pressure reducing valve 5 is closed for some reason, as shown in FIG. 5, the wearer rotates the hollow stem 24 by using the knob 26 to thereby reverse the end surface of the hollow plug 22 ( 40 may be spaced between the seating surface 49 and the fluid therein may be bypassed to the bypass passage 32 to be supplied to the exhaust pipe P.

Therefore, in an emergency situation in which the pressure reducing valve 5 is blocked, the wearer grasps the knob 26 and turns the hollow stem 24 to rotate the hollow plug 22 to reverse the gap between the end face 40 and the seating surface 49. When the bypass flow path 32 is opened, the fluid of the air supply valve 20 is bypassed through the bypass flow path 32 and directly supplied to the exhaust pipe P. This makes it possible to continuously maintain the air supply to the mask.

When the valve assembly 1 having the bypass passage 32 is applied to the air regulator pressure regulator as described above, the air flows into the mask through the bypass passage 32 even when the pressure reducing valve 5 is inoperable. Can be supplied to prevent safety accidents due to the blockage of the pressure reducing valve (5).

Meanwhile, the present invention is not limited to the above-described embodiments, but may be modified and modified without departing from the scope of the present invention, and such modifications and variations should be regarded as belonging to the technical spirit of the present invention. .

Claims (14)

A connecting tube having a flow path formed therein to guide the fluid supplied through the air supply pipe to the exhaust pipe; A pressure reducing valve installed on a flow path formed in the connecting pipe to regulate a pressure of the fluid supplied through the air supply pipe and to discharge it to the exhaust pipe; A bypass passage branched from the flow path connecting the air supply pipe and the pressure reducing valve to bypass the pressure reducing valve and connected to the exhaust pipe; And And a plug unit installed in the flow path connecting the air supply pipe and the pressure reducing valve to control the opening and closing of the bypass flow path in accordance with the advance and retreat movement. The plug unit It moves forward and backward toward the inlet of the bypass flow passage branched from the flow path connecting the air supply pipe and the pressure reducing valve to open and close the inlet of the bypass flow passage therein is formed with an exhaust hole for guiding the fluid flowing from the air supply pipe to the pressure reducing valve Hollow plug; A hollow stem connected to the hollow plug and extending to one side of a connecting pipe connected to the air supply pipe, and having an inflow hole for guiding fluid introduced from the air supply pipe to an exhaust hole of the hollow plug; A rotating ring installed on an outer circumferential surface of the hollow stem and communicating with the air supply pipe to guide the fluid introduced through the air supply pipe to the inflow hole of the hollow stem; And A knob provided integrally with the free end of the hollow stem to move the stem together with the plug; The hollow plug and the hollow stem is matched by a concave-convex structure capable of synchronous rotation and relative movement in the axial direction about the axis line. The method according to claim 1, The hollow plug is a valve assembly, characterized in that the sealing member is coupled to the end surface of one end, the sealing surface is sealed between the end surface and the seating surface of the connecting body corresponding to the end surface. The method according to claim 2, The seating surface of the connecting tube is formed to be inclined to protrude in a conical shape, The end surface of the hollow plug is conical in response to the seating surface, The sealing member is a valve assembly, characterized in that the sealing ring fitted to the end surface. The method according to claim 1, The hollow plug is inserted into the sealing tube coaxially on the inner end protrudes toward the connecting tube, The sealing tube body is a valve assembly, characterized in that consisting of a tubular hollow cylinder to form a through-hole so as not to interfere with the flow of the fluid. The method according to claim 1, The hollow plug is threaded coupled to the flow path connecting the supply pipe and the pressure reducing valve is moved forward and backward according to the rotation of the hollow plug valve assembly, characterized in that for opening and closing the inlet of the bypass flow path. The method according to claim 5, The hollow plug has a thread formed on its outer circumferential surface, and a thread is formed on the inner circumferential surface of the connecting pipe in response to the thread formed on the hollow plug, so that the hollow plug and the connecting pipe are threadedly coupled. The method according to claim 5, The hollow plug has a thread formed on its inner circumferential surface, and a thread is formed on the outer circumferential surface of the connecting pipe in response to the thread formed on the hollow plug, so that the hollow plug and the connecting pipe are threadedly coupled. A connecting tube having a flow path formed therein to guide the fluid supplied through the air supply pipe to the exhaust pipe; A pressure reducing valve installed on a flow path formed in the connecting pipe to regulate a pressure of the fluid supplied through the air supply pipe and to discharge it to the exhaust pipe; A bypass passage branched from the flow path connecting the air supply pipe and the pressure reducing valve to bypass the pressure reducing valve and connected to the exhaust pipe; And And a plug unit installed in the flow path connecting the air supply pipe and the pressure reducing valve to control the opening and closing of the bypass flow path in accordance with the advance and retreat movement. The plug unit It moves forward and backward toward the inlet of the bypass flow passage branched from the flow passage connecting the air supply pipe and the pressure reducing valve to open and close the inlet of the bypass flow passage therein is formed with an exhaust hole for guiding the fluid flow from the air supply pipe to the pressure reducing valve Hollow plug; A hollow stem connected to the hollow plug and extending to one side of a connecting pipe connected to the air supply pipe, and having an inflow hole for guiding fluid introduced from the air supply pipe to an exhaust hole of the hollow plug; A rotating ring installed on an outer circumferential surface of the hollow stem and communicating with the air supply pipe to guide the fluid introduced through the air supply pipe to the inflow hole of the hollow stem; And A knob provided integrally with the free end of the hollow stem to move the stem together with the plug; The hollow plug and the hollow stem is a valve assembly that is matched by an uneven structure capable of synchronous rotation and relative movement in the axial direction about the axis; A diaphragm for converting a positive pressure change inside the pressure regulator according to a wearer's breath into an operating source of a pressure reducing valve installed in the valve assembly; A link assembly for converting the reciprocating motion generated by the expansion and contraction of the diaphragm into the operation of the pressure reducing valve; And And a casing in which the valve assembly, the diaphragm, and the link assembly are mounted. The method according to claim 8, The hollow plug is a valve assembly, characterized in that the sealing member is coupled to the end surface of one end, the sealing surface is sealed between the end surface and the seating surface of the connecting body corresponding to the end surface. The method according to claim 9, The seating surface of the connecting tube is formed to be inclined to protrude in a conical shape, The end surface of the hollow plug is conical in response to the seating surface, The sealing member is a valve assembly, characterized in that the sealing ring fitted to the end surface. The method according to claim 8, The hollow plug is inserted into the sealing tube coaxially on the inner end protrudes toward the connecting tube, The sealing tube body is a valve assembly, characterized in that consisting of a tubular hollow cylinder to form a through-hole so as not to interfere with the flow of the fluid. The method according to claim 8, The hollow plug is threaded coupled to the flow path connecting the supply pipe and the pressure reducing valve is moved forward and backward according to the rotation of the hollow plug valve assembly, characterized in that for opening and closing the inlet of the bypass flow path. The method according to claim 12, The hollow plug has a thread formed on its outer circumferential surface, and a thread is formed on the inner circumferential surface of the connecting pipe in response to the thread formed on the hollow plug, so that the hollow plug and the connecting pipe are threadedly coupled. The method according to claim 12, The hollow plug has a thread formed on its inner circumferential surface, and a thread is formed on the outer circumferential surface of the connecting pipe in response to the thread formed on the hollow plug, so that the hollow plug and the connecting pipe are threadedly coupled.

Images