KR101452910B1 - Thermostatic fluid flow intermitting apparatus - Google Patents

Abstract

The present invention relates to a temperature-sensitive fluid flow interrupter, comprising: a housing having a main opening portion and an auxiliary opening portion, a part of which is exposed to the outside, installed in an inflow portion and an outflow portion of a fluid flow pipe through which a flow fluid flows; A main discharge pipe for discharging a small amount of flow fluid in accordance with a change in the internal pressure of each of the valve chambers, A valve block installed in the housing such that the auxiliary discharge pipe communicates with the main opening portion and the auxiliary opening portion of the housing, respectively; A temperature responsive means for generating a pressure difference in each of the valve chambers in the valve block in accordance with expansion / contraction of the temperature responsive fluid filled in the temperature responsive cap formed with the corrugated portion according to the temperature of the outside air; And opening and closing means provided in each of the valve chambers to selectively open and close respective valve chambers of the valve block according to discharge pressures discharged through the main discharge pipe and the auxiliary discharge pipe of the valve block.

Description

[0001] THERMOSTATIC FLUID FLOW INTERMITTING APPARATUS [0002]

The present invention relates to a temperature sensitive fluid flow interrupter

As is well known, a fluid (hereinafter referred to as a flow fluid) flowing in a water pipe, which is a representative fluid pipe, is frozen when the outside temperature becomes very low, such as in the winter season. When it freezes, it becomes bulky and cracks occur in the water pipe.

Accordingly, various devices and methods have been used to prevent this.

Korean Patent No. 10-0901269, No. 10-1041100 and No. 10-1142059 of the present applicant disclose that the temperature inside the fluid flow pipe is lower than the set temperature (the temperature of the external fluid is lowered and the temperature of the fluid flowing is equal to the external temperature A temperature-responsive fluid flow interrupter capable of discharging a small amount of fluid from the outside of the fluid flow pipe without power supply to prevent the fluid flow pipe from being frozen when the temperature reaches a predetermined temperature .

The temperature sensitive fluid flow interrupter disclosed in these prior art documents performs an amplification function using a first pressure chamber and a second pressure chamber through a narrow section and performs a closing function using a negative pressure, Since it is a device that detects and amplifies and intercepts a trace amount of water when the water is discharged or stopped, the structure of the product is relatively complicated and precise section is required for smooth operation, and the structure is simpler and precise section There is a growing demand for products that can operate smoothly even without them.

(Patent Document 1) Korean Patent No. 10-0901269 (published on June 9, 2009)

(Patent Document 2) Korean Patent No. 10-1041100 (published on Jun. 13, 2011)

(Patent Document 3) Korean Patent No. 10-1142059 (issued on July 12, 2012)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. It is an object of the present invention to provide a booster chamber which is similar in role to booster chambers but which does not require a conventional narrow- And a new operating type temperature-responsive flow-fluid interrupter capable of smoothly operating in a simple structure without a precise section.

According to an aspect of the present invention, a temperature-responsive flow-fluid interrupter is provided with an inlet and an outlet of a fluid flow pipe through which a flow fluid flows, housing; A main discharge pipe for discharging a small amount of flow fluid in accordance with a change in the internal pressure of each of the valve chambers, A valve block installed in the housing such that the auxiliary discharge pipe communicates with the main opening portion and the auxiliary opening portion of the housing, respectively; A temperature responsive means for generating a pressure difference in each of the valve chambers in the valve block in accordance with expansion / contraction of the temperature responsive fluid filled in the temperature responsive cap formed with the corrugated portion according to the temperature of the outside air; And opening and closing means provided in each of the valve chambers to selectively open and close respective valve chambers of the valve block according to discharge pressures discharged through the main discharge pipe and the auxiliary discharge pipe of the valve block.

Wherein the valve block is provided with a first communicating tube for communicating the flow fluid introduced into the fluid inflow chamber to the first valve chamber and the second valve chamber and a second communicating tube communicating between the temperature responsive chamber and the first communicating tube, And a third communicating pipe branching from the main discharge pipe to allow a part of the flow fluid discharged through the main discharge pipe to flow into the second valve chamber.

The temperature responsive means includes a temperature responsive chamber communicating with the fluid inflow chamber and being closed by the temperature responsive cap, a shaft installed to move up and down through the fluid inflow chamber and the communicating tube of the temperature sensitive filament, And a pressure compensation spring installed to raise and lower the shaft by expansion.

Wherein the temperature responsive fluid is a refrigerant gas, the temperature responsive cap contracts to flow fluid into each valve chamber in the valve block when the ambient temperature reaches a freezing point of the flowing fluid flowing into the housing, The inflow of the flow fluid into each of the valve chambers can be closed by the expansion of the cap.

The third communicating tube may further include a step portion on a portion of the main discharge pipe that has passed through the portion where the third communicating tube is branched.

According to the embodiment of the present invention, the flow fluid introduced into the valve block is discharged directly through the main discharge pipe every time the ambient temperature reaches the set temperature, and the flow fluid introduced into the valve block Is discharged through the auxiliary discharge pipe, it is possible to operate smoothly with a simple structure that does not need precise sections.

1 is a schematic sectional view showing a configuration of a temperature-responsive flow-fluid interrupter according to an embodiment of the present invention,
Fig. 2 is a schematic cross-sectional view of the direct flow in which the flow fluid in the piping reaches the freezing point in the state of Fig. 1 and the flow fluid flows into the valve block as the temperature responsive cap shrinks,
Fig. 3 is a schematic cross-sectional view of the operation in which the first valve chamber is opened in the state of Fig. 2 and the flow fluid in the fluid inlet chamber of the valve block is discharged through the main outlet,
Fig. 4 is a schematic sectional view of the operation in which the second valve chamber is opened in the state of Fig. 3 and the flow fluid introduced into the valve block is discharged through the auxiliary outlet;
5 is a schematic cross-sectional view of the operation in which the inflow of flow fluid into the valve block in accordance with the expansion of the temperature responsive cap in the state of Fig. 4 is interrupted and the flow fluid in the fluid inflow chamber is discharged through the main outlet,
Fig. 6 is a schematic cross-sectional view of the operation in which, in the state of Fig. 5, both the first and second valve chambers are closed and only the flow fluid in the valve block is discharged through the auxiliary outlet.

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

In the following description of the present invention, 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.

Fig. 1 shows a configuration of a temperature-responsive flow-fluid interrupter according to an embodiment of the present invention. 1, the temperature of the flow fluid is the normal temperature state, and no flow fluid flows into the interior of the valve block 20. [

As shown in FIG. 1, the temperature-sensitive fluid flow interrupter according to an embodiment of the present invention is a temperature-sensitive fluid flow interrupter having a main opening 12 and a sub- A housing 10 provided between the inflow part 2 and the outflow part 4 of the fluid flow pipe through which the flow fluid flows and a flow fluid introduced into the housing 10 flows into the housing 10, The valve chamber 24 has a fluid inflow chamber 22 and first and second valve chambers 24 and 26 and a pressure relief chamber 28 and a small amount (10) so that the main discharge pipe (16) and the auxiliary discharge pipe (18) for discharging the flow fluid communicate with the main opening (12) and the auxiliary opening (14) (20), and a temperature sensitive cap (44) of elastic material formed with a wrinkled portion (42) according to the temperature of the outside air, A temperature sensing means for generating a pressure difference in each of the valve chambers 24 and 26 in the valve block 20 and a temperature sensing means for sensing the temperature of the exhaust gas through the main discharge pipe 16 and the auxiliary discharge pipe 18 of the valve block 20, And opening and closing means provided in each of the valve chambers 24 and 26 to selectively open and close the respective valve chambers 24 and 26 of the valve block 20 according to the discharge pressure.

The housing 10 is composed of a main body 11 with its bottom opened and a bottom plate 11 with openings 12 and 14 formed therein so that the bottom plate 13 can be screwed onto the housing main body 11 have. The flow fluid of the fluid flow pipes 2 and 4 flows into the housing 10 through the inlet 2 and is discharged to the outlet 4 as shown by the large arrows.

The temperature responsive cap 44 may be sealably attached to the outside of the valve block 20 to form a temperature responsive chamber 30 therein which communicates with the fluid inflow chamber 22 of the valve block 20. [

When the temperature of the flow fluid in the housing 10 reaches the set temperature, the temperature sensitive fluid flow restrictor of the present embodiment adjusts the flow rate of the flow fluid introduced into the fluid inflow chamber 22 by the contraction of the temperature responsive cap 44 Is introduced into the fluid inflow chamber 22 of the valve block 20 as indicated by a small arrow by flowing the flow fluid through the one communicating tube 32 into the valve chambers 24 and 26 in the valve block 20 To discharge the flow fluid through the main discharge pipe 16 or to discharge the flow fluid introduced into the valve chambers 24 and 26 of the valve block 20 through the auxiliary discharge pipe 18. Here, the temperature responsive fluid is preferably a refrigerant gas, and the set temperature means a temperature at which the flow fluid in the housing 10 starts to be discharged to the outside. In the embodiment of the present invention, the outside air temperature (outside air) The temperature responsive cap 44 contracts and flows into each of the valve chambers 24 and 26 in the valve block 20 so that a small amount of flow fluid To the outside of the housing 10 to keep the temperature of the fluid in the fluid flow pipes (2, 4) at or above the set temperature at all times, thereby preventing the fluid flow pipes (2, 4) And the inflow of the flow fluid into the respective valve chambers 24 and 26 is closed by the expansion of the sensing cap 44.

The gel element can be used as the refrigerant gas, and although not specifically described, the shape memory alloy can be used instead of the expansion and contraction of the temperature responsive fluid using the refrigerant gas, or expansion and contraction can be performed by temperature response using bimetal Of course.

The first valve chamber 24 and the second valve chamber 26 of the valve block 20 are communicated by the first communicating pipe 32 so that the fluid communicating chamber 22 is opened when the first communicating pipe 32 is opened, The flow fluid may flow into the first and second valve chambers 24 and 26 through the first communicating pipe 32.

The temperature communication chamber 30 and the first communicating pipe 32 are communicated by the second communicating pipe 34 so that a part of the flowing fluid flowing into the first communicating pipe 32 flows through the second communicating pipe 34 And the main discharge pipe 16 and the second valve chamber 24 are communicated by the third communicating pipe 36 so that a part of the flowing fluid discharged through the main discharge pipe 16 Can be introduced into the second valve chamber (26) through the third communicating tube (36). To this end, the third communicating tube 36 may further include a step portion 80 formed at a portion of the main discharge pipe 16 next to the portion where the third communicating pipe 36 branches, the stepped portion 80 having a diameter smaller than the diameter of the main discharge pipe 16. A part of the flow fluid can be diverted to the third communicating tube 36 before being rapidly discharged to the outside by the step portion 80. [

A temperature sensitive shaft 52 in which an elastic airtight pad 51 and a valve member 53 are sealably interposed is installed on the communicating tube between the fluid inflow chamber 22 and the temperature sensitive chamber 30 The temperature sensitive shaft 52 positioned in the fluid inflow chamber 22 is always fitted with a pressure compensating spring 54 urged upward and the temperature responsive shaft 52 is connected to the fluid inflow chamber 22 of the first communicating tube 32 is opened or closed.

The flow fluid introduced into the temperature sensitive chamber 30 through the second communicating tube 34 compensates for the rebound resilience of the pressure compensating spring 54 to maintain the state of the temperature sensitive shaft 52 moved upward.

A first valve shaft 62 having an O-ring 61 for airtight sealing is provided so as to be vertically movable in the communication pipe between the fluid inflow chamber 22 and the first valve chamber 24, A valve member 63 is formed at one end of the first valve shaft 62 to open and close the fluid inflow chamber 22 and the main discharge pipe 16 in accordance with the rise and fall of the first valve shaft 62, A first rubber pad 65 may be formed to be opened and closed with the first communicating tube 32 according to the internal pressure.

The first communicating tube 32 is attached to the communicating tube between the second valve chamber 26 acting as the booster chamber and the pressure relief chamber 28. The second communicating tube 32 is attached to the second valve shaft 26 through the O- A valve member 72 is provided at one end thereof so as to be able to move upward and downward and is always urged downward by a pressure compensation spring 74 provided in the pressure release chamber 28 in accordance with the rising and falling of the second valve shaft 72 And a second rubber pad 75 may be formed at the other end of the second valve chamber 26 so as to open and close the third communication pipe 36 according to the internal pressure of the second valve chamber 26.

The operation of the temperature-responsive flow-fluid interrupter of the present invention constructed as described above will now be described with reference to FIGS. 2 to 6. FIG.

Fig. 2 shows a flow in which the flow fluid in the piping reaches the freezing point in the state of Fig. 1 and the flow fluid flows into the valve block as the temperature responsive cap shrinks.

As shown in FIG. 2, the temperature-sensitive flow-fluid interrupter according to an embodiment of the present invention, when the external temperature (outside air) is lowered to become equal to the freezing point of the flowing fluid in the housing 10, The pressure of the refrigerant gas filled in the cap 44 is reduced and the temperature responsive shaft 52 is moved upward due to the rebound resilience of the pressure compensating spring 54 according to the reduced pressure, The closed state between the first communicating tube 22 and the first communicating tube 32 is opened so that the flow fluid in the fluid inflow chamber 22 flows in a small amount through the first communicating tube 32 and a portion flows through the second communicating tube 34 And flows into the temperature responsive chamber 30 to apply pressure to the airtight pad 51 and the temperature sensitive cap 44. As the pressure is applied to the upper portion of the temperature sensitive cap 44 having a larger surface area, the temperature sensitive cap 44 is pushed upward and the inside of the temperature sensitive chamber 30 is widened. The sensing shaft 52 is moved upward, and the valve member 53 opens the first communicating tube 32.

The flow fluid introduced into the temperature sensitive chamber 30 through the second communicating tube 34 compensates for the elasticity of the pressure compensating spring 54 to maintain the state of the contracted temperature responsive cap 44. [

Next, Fig. 3 shows an operation in which the first valve chamber is opened in the state of Fig. 2 and the flow fluid in the fluid inflow chamber of the valve block is discharged through the main discharge pipe.

3, by increasing the pressure in the first communicating pipe 32 as the flow fluid in the fluid inflow chamber 22 flows in a small amount through the first communicating pipe 32, the first valve chamber 24 And the first rubber pad 65 that has closed the first communicating tube 32 are lifted upward. Accordingly, the first valve shaft 62 is also lifted upward, and the flow fluid flows into the first valve chamber 24 and is discharged through the main discharge pipe 16, and a part of the flow fluid flows into the third communicating pipe 36.

On the other hand, even if the pressure in the first communicating pipe 32 rises as the flow fluid in the fluid inflow chamber 22 flows in a small amount through the first communicating pipe 32, the valve member 63 of the second valve chamber 26 Is not lifted by the elasticity of the pressure compensating spring 74 of the pressure releasing chamber 28, and is kept closed.

Next, Fig. 4 shows an operation in which the second valve chamber is opened in the state of Fig. 3 and the flow fluid introduced into the valve block is discharged through the auxiliary discharge pipe.

Referring to FIG. 4, as the pressure of the flow fluid introduced into the third communicating pipe 36 rises, the second rubber pad 75, which has closed the gap between the second valve chamber 26 and the third communicating pipe 36, The second valve shaft 72 is also lifted upward so that the flow fluid introduced into the second valve chamber 26 through the third communicating tube 36 flows into the pressure release chamber 28 The valve member 73 which has closed the first communicating tube 32 and the pressure relief chamber 28 moves upward and the flow fluid introduced into the first communicating tube 32 flows into the pressure releasing chamber 28 (Not shown). At this time, the flow fluid that has flowed into the temperature sensing chamber 30 through the second communicating tube 34 flows back through the second communicating tube 34 and joins the first communicating tube 32 to enter the pressure relief chamber 28 do.

A certain amount of the flowing fluid flowing through the fluid flow pipes 2 and 4 through the series of processes described above is discharged to the outside so that the flow fluid of the relatively warm inflow portion 2 flows into the housing 10, 10 from being frozen.

Subsequently, when a flow fluid of the relatively warm inlet portion 2 flows into the housing 10 as a certain amount of flow fluid is discharged, the refrigerant gas filled in the temperature responsive cap 44 is expanded again, The temperature responsive shaft 52 is lowered downward by the elasticity of the pressure compensating spring 54 to close the first communicating tube 32 as shown in FIG. The flow fluid introduced into the fluid inflow chamber 22 of the valve block 20 is discharged through the main discharge pipe 16 which opens according to the rise of the first valve shaft 52, The flow fluid that has flowed into the first communicating tube 24 of the first communicating tube 24 is discharged through the auxiliary discharge tube 18.

6, the second valve shift 72 raised by the elasticity of the pressure compensation spring 74 in the pressure release chamber 28 The second rubber pad 75 is again pressed down to close the space between the second valve chamber 26 and the third communication passage 36 and return to the state shown in FIG.

As described above, in the temperature sensitive flow interrupter according to the embodiment of the present invention, by repeating the above-described operation, a certain amount of the flow fluid of the fluid flow pipe immediately before freezing is discharged to the outside, Thereby preventing freezing of the fluid flow pipe as the fluid inside the fluid flow pipe is not frozen without external power supply even when the outside temperature is lowered.

While the present invention has been described with respect to specific embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but may be modified and changed without departing from the scope and spirit of the general inventive concept as defined by the appended claims. Should be interpreted as having. Skilled artisans may implement a pattern of features that are not described in a combinatorial and / or permutational manner with the disclosed embodiments, but this is not to depart from the scope of the present invention.

It will be apparent to those skilled in the art that various changes and modifications may be readily made without departing from the spirit and scope of the invention as defined by the appended claims.

10: housing 16: main discharge pipe
18: auxiliary discharge pipe 20: valve block
22: fluid inflow chamber 24: first valve chamber
26: second valve chamber 28: pressure relief chamber
30: temperature sensing chamber 32, 34, 36: first to third communicating tubes
42: corrugation part 44: temperature sensitive cap
51: confidential pad 52: temperature responsive shaft
53, 63, 73: valve member 54, 74:
62: first valve shaft 65: first rubber pad
72: second valve shaft 75: second rubber pad
80: Short jaw

Claims (5)

A temperature sensitive fluid flow interrupter comprising:
A housing having a main opening portion and an auxiliary opening portion, the main opening portion and the sub opening portion of which are partially exposed to the outside, the inlet portion and the outlet portion of the fluid flow pipe through which the flow fluid flows;
A main discharge pipe for discharging the flow fluid in accordance with a change in the internal pressure of each of the valve chambers, and a main discharge pipe for discharging the flow fluid, A valve block installed in the housing to communicate with the main opening portion and the auxiliary opening portion of the housing, respectively;
A temperature responsive cap including a wrinkle portion, wherein the wrinkle portion shrinks and expands according to shrinkage and expansion of a temperature responsive fluid filled in the inside according to the temperature of the outside air;
A temperature responsive chamber communicating with the fluid inflow chamber and installed to be closed by the temperature sensitive cap;
A shaft installed to move up and down through the communication hole of the fluid inlet chamber and the temperature responsive chamber;
A pressure compensating spring installed to raise and lower the shaft by shrinkage and expansion of the temperature responsive cap; And
And opening / closing means provided in the first valve chamber and the second valve chamber for selectively opening and closing the first valve chamber and the second valve chamber in accordance with the discharge pressure discharged through the main discharge pipe and the auxiliary discharge pipe of the valve block ,
The flow fluid introduced into the fluid inflow chamber flows into the first valve chamber and the second valve chamber by the first communicating tube,
Wherein the temperature responsive chamber communicates with the first communicating tube by a second communicating tube,
A part of the flow fluid discharged through the main discharge pipe is branched by the third communicating pipe connected to the main discharge pipe and flows into the second valve chamber,
And the first communicating tube is opened and closed according to the ascending and descending of the shaft
Temperature sensitive fluid flow interrupter.
delete delete The method according to claim 1,
Wherein the temperature responsive fluid is a refrigerant gas,
When the outside temperature reaches the freezing point of the flowing fluid flowing into the housing, the temperature responsive cap shrinks and the flow fluid flows into each valve chamber in the valve block,
Closing the inflow of the flow fluid to the respective valve chamber by the expansion of the temperature responsive cap
Temperature - sensitive flow - fluid interrupter.
The method according to claim 1,
Further comprising a stepped portion at a portion of the main discharge pipe past a portion where the third communicating tube branches off
Temperature - sensitive flow - fluid interrupter.

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