KR101510711B1 - Constant Flow Regulator Preventing Backflow of Fluid - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow rate regulator for supplying compressed air supplied from an air supply unit to a tank at a constant flow rate for use in an air-borne liquid level measurement system for measuring liquid level in a tank using compressed air, A connecting member connected to the air supply unit and allowing the compressed air to flow therein; An insertion port into which a connecting member is inserted and which communicates with the connecting member to form a supply passage for the compressed air; The connecting member includes a communication hole communicating with the air supply pipe of the air supply unit, and the opening / closing unit is provided with an opening / closing unit for opening / closing the insertion port when the supply of the compressed air is absent, When the pressure of the compressed air is equal to or more than a predetermined value, the compressed air is released from the connecting member by the pressure to open the supply passage of the compressed air, The supply passage is automatically opened or closed in accordance with the pressure of the compressed air flowing from the supply unit and the air pressure of the pipe in the tank is kept constant in the flow regulator even when the compressed air is not supplied from the air supply unit, Flow regulator, reverse flow prevention function to prevent reverse flow to indicator It relates to a flow regulator.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow regulator,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow rate regulator for supplying compressed air supplied from an air supply unit to a tank at a constant flow rate for use in an air-borne liquid level measurement system for measuring liquid level in a tank using compressed air, A connecting member connected to the air supply unit and allowing the compressed air to flow therein; An insertion port into which a connecting member is inserted and which communicates with the connecting member to form a supply passage for the compressed air; The connecting member includes a communication hole communicating with the air supply pipe of the air supply unit, and the opening / closing unit is provided with an opening / closing unit for opening / closing the insertion port when the supply of the compressed air is absent, When the pressure of the compressed air is equal to or more than a predetermined value, the compressed air is released from the connecting member by the pressure to open the supply passage of the compressed air, The supply passage is automatically opened or closed in accordance with the pressure of the compressed air flowing from the supply unit and the air pressure of the pipe in the tank is kept constant in the flow regulator even when the compressed air is not supplied from the air supply unit, Flow regulator, reverse flow prevention function to prevent reverse flow to indicator It relates to a flow regulator.

Airborne liquid level measurement system measures the level of fluid stored in the tank. It measures the level and quantity of fuel oil tank, various oil tank, ballast tank, etc. of the ship, It is widely used for the measurement of the wobble gradient.

1, the compressed air flows from the air supply unit 101 to the flow rate regulator 102, and is supplied to the flow rate regulator 102 at a constant flow rate And is injected into the change tank 104. The compressed air injected into the tank 104 is discharged into the liquid contained in the tank 104 along the pipe installed in the tank 104. The air having a pressure higher than the pressure corresponding to the liquid level of the liquid is discharged from the pipe 104 Lt; / RTI > At this time, the pressure inside the pipe corresponds to the head pressure of the liquid, and the liquid level can be measured by dividing the head pressure by the specific gravity of the liquid. The air that has passed through the flow regulator 102 is also passed to an indicator 105 labeled with a capacity corresponding to the liquid level and the liquid level in the tank 104 or to P / And the liquid level of the liquid in the tank 104 can be measured by displaying the liquid level in the display unit 107 such as a monitor.

However, when the level of the liquid in the tank 104 is measured and the supply of the compressed air from the air supply unit 101 is finished, the air pressure of the pipe between the flow rate regulator 102 and the tank 104 gradually decreases, 104 have flowed back to the flow regulator 102 and the devices such as the indicator 105, the P / I converter 106 and the air supply unit 101. This causes the device and the piping to be contaminated and replaced There was an inconvenience in that it was necessary to clean or wash.

In order to solve this problem, an air purge head 103 of a check valve type (NON-RETURN VALVE), which is a safety device installed at the front end of the tank 104 to prevent the backward flow of the fluid in the tank 104, Even if the air purge head 103 is installed, the air purge head 103 can be prevented from passing through the air purge head to the tank 104 by various devices including the flow controller 102, A problem has arisen that the liquid in the liquid flow backflows.

(Patent Literature)

Open Patent Publication No. 10-2009-0027849 (Published March 18, 2009) "Air purge head"

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

The present invention relates to an air supply unit, comprising: a connecting member connected to an air supply unit to allow compressed air to be introduced; An insertion port into which a connecting member is inserted and which communicates with the connecting member to form a supply passage for the compressed air; The connecting member includes a communication hole communicating with the air supply pipe of the air supply unit, and the opening / closing unit is provided with an opening / closing unit for opening / closing the insertion port when the supply of the compressed air is absent, When the pressure of the compressed air is equal to or more than a predetermined value, the compressed air is released from the connecting member by the pressure to open the supply passage of the compressed air, The supply passage is automatically opened or closed in accordance with the pressure of the compressed air flowing from the supply unit and the air pressure of the pipe in the tank is kept constant in the flow regulator even when the compressed air is not supplied from the air supply unit, Flow regulator, reverse flow prevention function to prevent reverse flow to indicator The purpose to provide a flow regulator.

The present invention relates to an opening / closing unit for a portable terminal, comprising: an insertion opening including a first insertion opening for guiding movement of the opening / closing unit; A blocking member which is formed to protrude from one end of the guide shaft and has a protruding end whose one side is brought into close contact with the communication hole; And an elastic body attached to one end of the first insertion port and inserted into the first insertion port and the other end attached to the other side surface of the protruding end so as to surround the guide shaft, The present invention provides a flow regulator having a backflow prevention function capable of precisely contacting a communication hole without losing its balance even in repeated opening and closing processes by moving the insertion port along the first insertion port when opening and closing the insertion port according to the supplied compressed air pressure .

According to the present invention, there is provided an image forming apparatus comprising: a support shaft which is formed on one side of a protruding end and forms an insertion groove along an outer circumferential surface at a portion in contact with one side of the protruding end; And a blocking member which is inserted into the insertion groove and which is in close contact with the communication hole, so as to more effectively block the leakage of the compressed air.

The present invention comprises a connecting member including a second sealing means inserted so as to be in close contact with an outer surface of a flow rate regulator and a connecting member so that compressed air does not leak from the inlet to the outside, Which is capable of preventing the flow rate of the refrigerant from being reduced.

In order to achieve the above object of the present invention, a flow rate regulator having a backflow prevention function includes the following arrangement.

According to an embodiment of the present invention, a flow rate regulator having a backflow prevention function according to the present invention includes: a connection member connected to the air supply unit to introduce compressed air; An insertion port into which the connection member is inserted and which communicates with the connection member to form a supply passage for compressed air; Wherein the connection member includes a communication hole communicating with an air supply pipe of the air supply unit, wherein the opening / closing unit is configured to supply the compressed air to the air supply unit, When the pressure of the compressed air is equal to or lower than the predetermined value, the connecting member is elastically pressed to seal the insertion port, thereby blocking the leakage of the compressed air in the piping in the tank. To open the supply passage of the fuel cell.

According to another embodiment of the present invention, in the flow rate regulator having the backflow prevention function according to the present invention, the opening / closing unit includes a blocking member for blocking the insertion port; And an elastic body having one end attached to the blocking member and the other end fixed to one side of the insertion port to provide an elastic force to the blocking member.

According to another embodiment of the present invention, in the flow rate regulator having the backflow prevention function according to the present invention, the blocking member includes: a guide shaft for guiding the movement of the elastic body; And a protruding end protruding from one end of the guide shaft and having one side thereof in close contact with the communication hole.

According to another embodiment of the present invention, in the flow rate regulator having the backflow prevention function according to the present invention, the blocking member is formed on one side of the protruding end, and the outer circumferential surface at the portion contacting the one side of the protruding end A supporting shaft for forming an insertion groove; And sealing means sandwiched between the insertion grooves and brought into close contact with the communication holes.

According to another embodiment of the present invention, in the flow rate regulator having the backflow prevention function according to the present invention, the insertion port includes a first insertion port for guiding the movement of the opening / closing unit and a second insertion port for guiding movement of the opening / Wherein the elastic body has one end attached to one side of the first insertion port and inserted into the first insertion port and the other end attached to the other side of the protruding end so as to surround the guide shaft .

According to another embodiment of the present invention, there is provided a flow rate controller having a backflow prevention function according to the present invention, wherein the connection member includes a second sealing means inserted in close contact with an outer surface of the flow rate regulator and the connection member So that the compressed air does not leak from the insertion port to the outside.

According to another embodiment of the present invention, the flow rate regulator having the backflow prevention function according to the present invention includes a gage outlet for discharging compressed air to a gage side capable of reading pressure, and a tank outlet for injecting compressed air into the tank .

The present invention can obtain the following effects by the above-described embodiment, the constitution described below, the combination, and the use relationship.

The present invention relates to an air supply unit, comprising: a connecting member connected to an air supply unit to allow compressed air to be introduced; An insertion port into which a connecting member is inserted and which communicates with the connecting member to form a supply passage for the compressed air; The connecting member includes a communication hole communicating with the air supply pipe of the air supply unit, and the opening / closing unit is provided with an opening / closing unit for opening / closing the insertion port when the supply of the compressed air is absent, When the pressure of the compressed air is equal to or more than a predetermined value, the compressed air is released from the connecting member by the pressure to open the supply passage of the compressed air, The supply passage is automatically opened or closed in accordance with the pressure of the compressed air flowing from the supply unit and the air pressure of the pipe in the tank is kept constant in the flow regulator even when the compressed air is not supplied from the air supply unit, Flow regulator, indicator, and the like.

The present invention relates to an opening / closing unit for a portable terminal, comprising: an insertion opening including a first insertion opening for guiding movement of the opening / closing unit; A blocking member which is formed to protrude from one end of the guide shaft and has a protruding end whose one side is brought into close contact with the communication hole; And an elastic body attached to one end of the first insertion port and inserted into the first insertion port and the other end attached to the other side surface of the protruding end so as to surround the guide shaft, The insertion port is moved along the first insertion port when the insertion port is opened or closed according to the pressure of the supplied compressed air, thereby making it possible to accurately contact the communication port without losing balance even in repeated opening and closing processes.

According to the present invention, there is provided an image forming apparatus comprising: a support shaft which is formed on one side of a protruding end and forms an insertion groove along an outer circumferential surface at a portion in contact with one side of the protruding end; And a sealing member that is inserted into the insertion groove and closes the communication hole so as to be in close contact with the communication hole, thereby effectively preventing the leakage of the compressed air.

The present invention comprises a connecting member including a second sealing means inserted so as to be in close contact with an outer surface of a flow rate regulator and a connecting member so that compressed air does not leak from the inlet to the outside, Can be prevented from being reduced.

1 is a schematic view showing an air-
2 is a perspective view of a flow controller according to an embodiment of the present invention;
Fig. 3 is a sectional view taken along the line A of Fig. 2,
Fig. 4 is an exploded perspective view of part A of Fig.
5 is a sectional view taken along the line A in Fig.
FIG. 6 is a view for explaining the operation of the opening and closing unit of FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a flow rate regulator having a backflow prevention function according to the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements, rather than excluding other elements, unless specifically stated otherwise.

2 to 6, a flow rate controller having a backflow prevention function according to an embodiment of the present invention is used in an airborne liquid level measurement system for measuring a liquid level in a tank 104 using compressed air And a flow rate controller for supplying the compressed air supplied from the air supply unit (101) to the tank (104) at a constant flow rate, wherein the flow rate controller having the backflow prevention function is connected to the air supply unit (101) A connecting member (2) for allowing air to flow therethrough; An insertion port (1) into which the connection member (2) is inserted and which communicates with the connection member (2) to form a supply passage for compressed air; And an opening and closing unit 3 for opening and closing the insertion port 1. The connection member 2 has a communication hole 21 communicating with an air supply pipe (not shown) of the air supply unit 101 The opening and closing unit 3 is elastically pressed against the connecting member 2 when the compressed air is not supplied or the pressure of the compressed air is equal to or less than a predetermined value to seal the insertion port 1, The pressure of the compressed air in the pipeline is blocked, and when the pressure of the compressed air is equal to or more than a predetermined value, the compressed air is released from the connecting member (2) The flow rate regulator may include a tank outlet 4 for injecting compressed air into the tank 104 and a gauge outlet 5 for discharging compressed air to the gauge side for reading the pressure.

The flow rate regulator is configured to receive compressed air from the air supply unit 101 and to inject the compressed air into the tank 104 and the gauge such as the indicator 105 as described above. (6) to be transferred to the gauge outlet (4) and the gauge outlet (5) (see Fig. 5).

The insertion port 1 is a space into which the connection member 2 and the opening and closing unit 3 are inserted and includes a first insertion port 11 for guiding the movement of the opening and closing unit 5, And a second insertion port 12 to which the second insertion port 12 is inserted.

The first insertion opening 11 is a cylindrical space formed in contact with the tank outlet 4 and the connection pipe 6 for transferring the compressed air to the gage outlet 5 and is provided inside the opening and closing unit 3, A guide shaft 311 and an elastic body 33 to be described later are inserted so that the opening and closing unit 3 moves along the first insertion opening 11. [ The first insertion port 11 is formed to have a larger diameter than the connection pipe 6 because the elastic body 33 is attached to one side of the first insertion port 11 so that the elastic body 33 And the guide shaft 311 and the elastic body 33 are formed to have a diameter greater than that of the guide shaft 311 and the elastic body 33 so that the guide shaft 311 and the elastic body 33 are inserted into the first insertion hole 331, So that compressed air can be introduced into the connection pipe (6) even in a state of being inserted into the connection pipe (11). The detailed inflow process of the compressed air will be described later.

The second insertion port 12 is formed as a space extending from the first insertion port 11 and is opened to the outside of the flow rate regulator so that the connection member 2 can be inserted. The second insertion port 12 may be threaded along an inner circumferential surface of a portion where the connection member 2 is inserted so that the connection member 2 can be screwed into the second insertion hole 12. However, various other fixing methods can be applied as long as the connecting member 2 can be inserted and attached, and the shape of the second insertion opening 12 can be variously formed according to the shape of the connecting member 2 . Of course, the second insertion port (12) and the connecting member (2) are to be joined in a tightly closed state so that no air leaks out of the flow rate regulator.

The connecting member 2 includes a communication hole 21 connecting the air supply unit 101 and the flow rate regulator and communicating with the air supply pipe of the air supply unit 101, 12 so that the compressed air supplied from the air supply unit 101 is not leaked to the outside. It is preferable that the connecting member 2 is threaded along the outer circumferential surface of the portion to be inserted into the second insertion port 12 so as to be coupled with the second insertion port 12. As described above, And the connecting member 2 may be formed in various shapes depending on the shape of the second insertion port 12. [ The connection member 2 may include a second sealing member 23 inserted in close contact with the outer surface of the flow rate regulator and the connection member 2 so that compressed air flows from the insertion port 1 to the outside Leakage can be prevented.

The communication hole 21 is formed in the connecting member 2 and communicates with the inlet 1 and the air supply pipe so that compressed air supplied from the air supply unit 101 is supplied to the flow rate regulator 1. [ As shown in FIG. The communication hole 21 is blocked by the opening / closing unit 3 at a portion communicating with the second insertion port 12 so that the compressed air in the insertion port 1 is not leaked through the communication hole 21 . The communication hole 21 is formed so as to be inclined outward at a portion where the sealing means 317 to be described later is closely contacted to form the inclined surface 22 in the connecting member 2 to improve the adhesion of the sealing means 317 .

The second sealing means 23 is configured to close the second insertion port 12 so that the compressed air does not leak to the outside from the second insertion port 12 into which the connection member 2 is inserted, 2 and is positioned at the end of the portion of the connecting member 2 to be inserted into the second insertion port 12, that is, at the entrance of the second insertion port 12, and the outer surface of the flow regulator Are formed to be in close contact with each other between the connecting members (2). Preferably, the second sealing means 23 is formed of a circular O-ring having a predetermined elasticity. In addition, the second sealing means 23 may be inserted between the outer surface of the flow rate regulator and the connecting member 2, Various methods can be applied. The connecting member 2 may be threaded along the outer peripheral surface of the portion to be inserted into the second insertion port 12 and may be screwed with the second insertion port 12 to close the second insertion port 12, The second sealing means 23 may be additionally provided so that the leakage of the compressed air through the gap of the threads can be essentially blocked.

When the compressed air is not supplied or the pressure of the compressed air is equal to or less than a predetermined value, the opening / closing unit 3 is elastically pressed against the connecting member 2 to seal the insertion port 1, And when the pressure of the compressed air is equal to or more than a predetermined value, the compressed air is released from the connecting member (2) by the pressure to open the supply passage of the compressed air. Accordingly, the opening / closing unit 3 opens / closes the insertion port 1 according to the pressure of the compressed air supplied from the air supply unit 101, and, as shown in FIG. 4, And an elastic body 33 attached to the blocking member 31 to provide an elastic force. As described above, when the supply of the compressed air by the air supply unit 101 is stopped, the air pressure of the piping in the tank 104 decreases due to various causes, and the liquid in the tank 104 flows along the piping The inlet port 1 is automatically closed when the supply of the compressed air from the air supply unit 101 is stopped and the pressure is reduced as described above, It is possible to solve the problem that the liquid flows back from the tank 104 by keeping the air pressure of the pipe inside the tank 104. [ The detailed operation of the opening / closing unit 3 will be described later.

The blocking member 31 includes a guide shaft 311 for guiding the movement of the elastic body 33; And a protruding end 313 protruding from one end of the guide shaft 311 and having one side thereof in close contact with the communication hole 21. The insertion port 1 is closed. The blocking member 31 is formed on one side of the protruding end 313 and has a supporting shaft 315a which forms an insertion groove 315a along the outer circumferential surface at a portion adjacent to one side of the protruding end 313 315); And a sealing means 317 which is fitted in the insertion groove 315a and is in close contact with the communication hole 21.

The guide shaft 311 has a cylindrical shape and is formed so as to surround the elastic body 33 along the outer circumferential surface of the guide shaft 311. The guide shaft 311 is formed in the first insertion hole 11 in accordance with the pressure of the compressed air supplied from the air supply unit 101, So that the opening / closing unit 3 is moved along the first insertion hole 11. The opening / Accordingly, the opening / closing unit 3 can be accurately brought into close contact with the communication hole 21 without losing balance even in the repeated opening / closing process, thereby closing the insertion port 1. [

The protruding end 313 is formed to protrude in the circumferential direction from one end of the guide shaft 311 and one side of the protruding end 313 is in close contact with the communication hole 21 to open and close the insertion port 1, And the elastic member 33 is attached to the other side so as to provide an elastic force to the blocking member 31. As described above, the elastic body 33 is attached and supported to the other side of the protruding end 313 facing each other and one side of the first insertion opening 11, so that the elastic body 33 ) Can be reliably compressed and restored. One side of the protruding end 313 may be formed to be larger in diameter than the communication hole 21 to block the communication hole 21, but it is preferable that the compressed air leaks to the communication hole 21 It is preferable to use the sealing means 317 in order to block more effectively. Details of the sealing means 317 will be described later.

The supporting shaft 315 may extend from one side of the protruding end 313 and may be inserted into the communication hole 21. The sealing shaft 315 may be configured to be inserted into the communication hole 21 at a portion contacting the protruding end 313, 317 are inserted into the insertion groove 315a. The supporting shaft 315 serves to support the sealing means 317, which will be described later, so as to be fixed without moving.

The insertion groove 315a is formed to be inserted into the insertion hole 315a at a predetermined depth along the circumference of the support shaft 315 and is in contact with one side of the protrusion 313. [ The sealing means 317 fitted in the insertion groove 315a is supported and fixed on one side of the protruding end 313 and one end of the supporting shaft 315.

The sealing means 317 is configured to be fitted in the insertion groove 315a and is brought into close contact with the communication hole 21 to more effectively prevent air from escaping through the communication hole 21. [ As described above, the communication hole 21 may form an inclined surface 22 outward at a portion where the sealing means 317 is in close contact, so that the sealing force of the sealing means 317 can be improved. The sealing means 317 may be formed in various shapes according to the shape of the insertion groove 315a and various methods may be applied to close the insertion hole 1 in close contact with the communication hole 21, In the embodiment, O-ring is preferably applied. O-rings of a circular shape having constant elasticity are applied to the sealing means 317, thereby minimizing the loss of the pressure of the pipe.

The elastic body 33 is configured to open and close the insertion port 1 according to the pressure of the compressed air supplied from the air supply unit 101 by providing an elastic force to the blocking member 31, One end of which is attached to one side of the first insertion port 11 and inserted into the first insertion port 11 and the other end is attached to the other side of the protruding end 313, And can be formed so as to surround it. The elastic body 33 may be formed of a spring having elasticity corresponding to a predetermined pressure of the compressed air so that the elastic body 33 can be compressed according to the pressure of the compressed air flowing through the communication hole 21. The elastic body 33 is formed to be inserted into the first insertion opening 11 and is compressed and restored along the first insertion opening 11 so as to surround the guide shaft 311 so as not to lose its balance , So that the blocking member (31) can accurately block the communication hole (21) by repeating the compression and restoration processes stably. Therefore, even when the supply of the compressed air from the air supply unit 101 is interrupted, the air pressure of the pipe in the tank 104 is kept constant, and the liquid in the tank 104 flows backward along the pipe .

The tank outlet 4 discharges the compressed air flowing through the connection line 6 to the tank 104 and the gauge outlet 5 has a pressure equal to that of the compressed air discharged to the tank 4 The compressed air is discharged to the indicator 105, the P / I converter 106, and the like, so that the water level can be measured through the pressure corresponding to the head pressure of the liquid in the tank 104.

The connection conduit 6 communicates with the first inlet 11 and transfers the compressed air introduced through the first inlet 11 to the tank outlet 4 and the gauge outlet 5. The connection conduit 6 may include pipes, valves, etc. of various shapes, but it is not related to the embodiment of the present invention, and thus description thereof is omitted.

The operation of the opening / closing unit 3 will be described with reference to FIG.

6 (a) shows a state in which the compressed air supplied from the air supply unit 101 is opened to the insertion port 1, and FIG. 6 (b) shows a state in which the compressed air supplied from the air inlet unit 1 Is closed so that the air pressure of the pipe in the tank 104 is kept constant.

First, referring to FIG. 6 (a), a description will be given of a process of introducing compressed air. When the compressed air starts to be supplied from the air supply unit 101 and the pressure of the compressed air is equal to or higher than a certain pressure, The elastic force of the elastic body 33 is overcome and the elastic body 33 is compressed. When the elastic body 33 is compressed, the blocking member 31, which is in close contact with the communication hole 21, is detached from the connecting member 2, and the communication hole 21, The supply passage is formed through the connection pipe 6 and the compressed air starts to flow into the insertion port 1 through the communication hole 21 from that time. The supply of the compressed air continues until the level of the liquid in the tank 104 is completed, and when the level measurement is completed, the supply of compressed air from the air supply unit 101 is stopped.

The process of closing the insertion port 1 will be described with reference to FIG. 6 (b). When the supply of the compressed air is stopped and the pressure of the compressed air flowing through the communication hole 21 drops below a predetermined pressure The elastic body 33 is stretched by the restoring force so that the blocking member 31 is brought into close contact with the communication hole 21 to close the insertion port 1. [ In this case, the insertion port 1 is closed from the time when supply of the compressed air is stopped by the air supply unit 101, so that the air pressure of the pipe in the tank 104 can be kept constant. Therefore, it is possible to prevent the liquid in the tank 104 from flowing backward along the piping to the flow regulator, the indicator 105, the P / I converter 106, etc., and the air pressure of the piping It is possible to prevent the apparatus such as the air supply unit 101 from being contaminated through the flow controller even when the liquid in the tank 104 flows backward.

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, Should be interpreted as falling within the scope of.

100: Air-borne liquid level measurement system
101: Air supply unit 102: Flow regulator
103: air purge unit 104: tank
105: Indicator 106: P / I CONVERTER
107: Display unit
1: insertion hole
11: first insertion opening 12: second insertion opening
2:
21: communication hole 22: inclined surface 23: second sealing means
3: opening / closing unit
31:
311: guide shaft 313: protruding end
315: Support shaft 315a: Insert groove
317: Sealing means
33: elastomer
4: tank outlet
5: Gauge outlet
6:

Claims (7)

A flow rate controller for supplying compressed air supplied from an air supply unit to a tank at a constant flow rate,
Wherein the flow rate regulator comprises: a gauge outlet for discharging compressed air to a gauge side for reading pressure; A tank outlet for injecting compressed air into the tank; A connecting member connected to the air supply unit to allow compressed air to flow therein; An insertion port into which the connection member is inserted and which communicates with the connection member to form a supply passage for compressed air; And an opening / closing unit for opening / closing the insertion port,
Wherein the connecting member includes a communication hole communicating with the air supply pipe of the air supply unit,
Wherein the opening / closing unit comprises: a blocking member for blocking the insertion port; And one end of the elastic member is attached to the blocking member and the other end is fixed to one side of the insertion port to provide an elastic force to the blocking member,
The blocking member includes: a guide shaft for guiding the movement of the elastic body; And a protruding end protruding from one end of the guide shaft and having one side thereof in close contact with the communication hole,
The insertion port includes a first insertion port for guiding the movement of the opening and closing unit and a second insertion port for insertion and coupling of the connection member. The first insertion port is connected to the tank outlet port and the connection port for transferring the compressed air to the gauge outlet port Contact,
Wherein the elastic body has a diameter smaller than the diameter of the first insertion port and is inserted and supported at one end of the first insertion port and the other end is attached to the other side of the protruding end to surround the guide shaft,
The blocking member is elastically pressed toward the connection member by the elastic body to seal the insertion port when the supply of the compressed air is absent or when the pressure of the compressed air is a predetermined value or less, thereby blocking the leakage of the compressed air in the in- Wherein the flow control valve is configured to release the compressed air from the connection member when the compressed air is supplied or when the pressure of the compressed air is equal to or more than a predetermined value. delete delete 2. The apparatus according to claim 1, wherein the blocking member
A supporting shaft formed on one side of the protruding end and forming an insertion groove along an outer circumferential surface at a portion contacting the one side of the protruding end; And a sealing means fitted in the insertion groove to be in close contact with the communication hole. delete 5. The method according to any one of claims 1 to 4,
Wherein the connection member includes a second sealing means inserted in close contact with an outer surface of the flow rate regulator and the connecting member so as to prevent leakage of the compressed air from the insertion opening to the outside. regulator.
delete

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