KR101873560B1

KR101873560B1 - Safety valve

Info

Publication number: KR101873560B1
Application number: KR1020170023305A
Authority: KR
Inventors: 김광엽
Original assignee: 김광엽
Priority date: 2017-02-22
Filing date: 2017-02-22
Publication date: 2018-07-02

Abstract

When the overpressure is applied to the fluid storage tank or the pipeline more than necessary, the overpressure is discharged to the outside to automatically adjust the pressure inside the storage tank or pipeline, and the safety valve is configured to enable precise opening and closing operation. The valve is started.

Description

Pressure control safety valve {SAFETY VALVE}

The present invention relates to a pressure control safety valve, and more particularly, to a pressure control safety valve which is capable of automatically controlling an internal pressure of a storage tank or a pipeline by discharging an over-pressure to the outside when an over- And the safety valve is capable of precise opening and closing operations.

In general, when overpressure is applied to a fluid storage tank or a pipeline, the safety valve is used to discharge a part of the fluid to the outside or to bypass the fluid storage tank to prevent damage to the storage tank or pipeline and to secure safety Is used.

Fig. 1 shows an example of a conventional safety valve. The conventional safety valve 10 is configured such that the valve body 12 having a circular disk shape normally closes the inlet port 11a by the elastic force of the spring 13, When the pressure of the fluid exceeds the elastic force of the spring 13, the spring is compressed and the inlet 11a closed by the valve body is opened so that a part of the fluid is discharged to the outside through the discharge port 11b, Thereby maintaining the pressure in the vessel or conduit within a certain pressure.

However, since the conventional safety valve is constructed such that the valve body 12 is directly supported by the end portion of the bias spring 13, the elastic force of the spring is applied to the contact surface between the valve body and the spring in the form of a circular ring, The elastic force of the spring easily acts eccentrically with respect to the center of the valve body even when the bottom surface is ground with a high degree of precision and it is difficult to precisely control the opening pressure of the valve such as the valve is abnormally opened by the fine rotation of the valve body Since the outer diameter 12a of the valve body is spaced from the inner wall of the valve body 11 by a predetermined distance in order to ensure the passage of the fluid discharged when the valve is opened, .

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above problems, and it is an object of the present invention to provide a fluid storage tank and a pipeline which are capable of automatically controlling an internal pressure of a storage tank or a pipeline by discharging an over- And to provide a pressure regulating safety valve that allows the safety valve to perform precise opening and closing operations.

The above object of the present invention can be achieved by providing an apparatus for forming a male screw in a storage tank or a pipeline at a lower end thereof and having an inlet formed in the male screw engagement portion and a female screw engagement portion formed on an inner surface of the upper end, A sliding hole is formed at an upper portion of the supporting jaw and communicated with an inlet port. An upper side of the male screw coupling portion communicates with the sliding hole along a circumferential direction on an outer surface thereof to discharge an abnormal overpressure to the outside A valve body having a nut portion formed with a plurality of exhaust holes and a male screw fastening portion formed on an outer surface thereof is coupled to a female screw engagement portion of the valve body to close an upper side of the valve body, A valve cap which is vertically adjustably coupled to the valve cap, And an upper end portion of the upper end portion is formed with a receiving portion having an outer surface in close contact with the sliding hole and a conical support groove formed in the center of the inner surface of the receiving portion and an abnormal overpressure is introduced through the inlet, A valve disc that is moved upward on the sliding hole and operates to discharge an excessive overpressure to the exhaust hole by opening the inlet port; and a valve disc interposed between the valve cap and the valve disc to elastically press the valve disc downward An upper spring supporting member having an upper surface and an upper fitting hole formed on the lower surface of the valve cap and having an upper fitting protrusion formed on the lower surface of the valve cap for supporting the upper end of the spring, And the lower apex is closely attached to the apex of the inside of the support groove And the valve disc is movable in the up-and-down direction without eccentricity so that the elasticity of the spring generated by the upward movement of the valve disc is concentrated at the joint between the support protrusion and the support groove. And a lower sprung portion having a lower fitting protrusion on the upper surface of which the lower end of the spring is inserted and supported.

The pressure control safety valve according to the present invention is configured to automatically control the internal pressure of the reservoir tank or pipeline by discharging an abnormal overpressure to the outside when overpressure is applied to the fluid storage tank or the pipeline more than necessary, So that the safety valve can be precisely opened and closed.

1 is a view for explaining a conventional safety valve,
FIG. 2 is an exploded perspective view of a pressure control safety valve according to the present invention, FIG.
FIG. 3 is an assembled cross-sectional view of a pressure control safety valve according to the present invention,
FIGS. 4 and 5 are operation diagrams of a pressure control safety valve according to the present invention;
6 is a view for explaining the operation of another preferred embodiment of the pressure control safety valve according to the present invention,
Figure 7 is a front view of another preferred embodiment of a pressure-controlled safety valve according to the present invention;
FIGS. 8 to 13 are views for explaining the structure and operation of the pressure control safety valve according to FIG. 7;

FIG. 1 is a perspective view illustrating a pressure control safety valve according to the present invention, FIG. 2 is an end view of the pressure control safety valve according to the present invention, FIG. 3 and FIG. .

The pressure control safety valve according to the present invention is capable of automatically controlling the internal pressure of the storage tank or the pipeline (1) by discharging an excessive overpressure to the outside when overpressure is applied to the fluid storage tank or the pipeline (1) The valve body 100 is installed in a part of the fluid storage tank or the pipeline 1.

Specifically, the valve body 100 is formed at its lower end with a male thread engagement portion 110 to be coupled to a storage tank or a pipeline 1, an inlet 120 is formed in the male thread engagement portion 110, And a female screw joint part 130 is formed on the inner surface of the upper end part. That is, the valve body 100 is coupled to a part of the storage tank or the pipeline 1 in a fastening manner through the male thread engagement part 110 formed at the lower end. The valve body 100 is formed with a support protrusion 140 on the upper side of the inflow port 120. The valve protrusion 140 is formed on the upper side of the support protrusion 140 so as to be wider than the inflow port 120 and communicated with the inflow port 120 And a plurality of exhaust holes 161 communicating with the sliding holes 150 along the circumferential direction on the outer surface of the male screw engagement portion 110 to exhaust an abnormal overpressure to the outside, The formed nut portion 160 is formed.

The valve cap 200 is closed at the upper side through the valve cap 200. The valve cap 200 has a male screw fastening part 210 formed on the outer surface thereof coupled with the female screw fastening part 130 of the valve body. Thereby closing the upper side of the valve body 100. The valve cap 200 is coupled to the valve body 100 so that the height of the valve cap 200 can be adjusted according to the degree of engagement of the valve cap 200 with the female screw engagement portion 130. Here, the valve cap 200 is coupled to the valve body 100 by adjusting the height of the valve body 100 to adjust the tension of a spring, which will be described later, Will be described later in detail.

The inlet 120 of the valve body is selectively opened and closed through a valve disc 300 installed in the sliding hole 150. More specifically, the valve disc 300 is configured such that the rubber packing 310 is mounted on the outer surface of the lower end portion and is closely attached to the support protrusion 140 to close the inlet 120, And a receiving portion 320 closely attached to the hole 150 and having a conical support groove 321 formed at the center of the inner surface thereof is formed. When the abnormal overpressure flows in the storage tank or the pipeline 1 through the inlet 120, the valve disc 300 is moved upward from the sliding hole 150 to open the inlet 120, 161 so as to exhaust the abnormal overpressure.

A spring 400 is interposed between the valve cap 200 and the valve disc 300 on the sliding hole 150 to elastically press the valve disc 300 downward. That is, the spring 400 elastically presses the valve disc 300 downward so that the valve disc 300 closes the inlet port 120, and the spring disc 400 passes through the inlet port 120 to the storage tank or the channel 1 The valve disc 300 is compressed by the upward movement of the valve disc 300 and the valve disc 300 is opened to open the inlet port 120. When the over-pressure is exhausted, the valve disc 300 is elastically deformed downward Thereby sealing the inlet port 120 again through the valve disc 300. As shown in FIG.

Here, the valve disc 300 blocking the inlet 120 of the valve body is opened only when the abnormal overpressure is equal to or higher than the allowable pressure, and the elastic modulus of the spring 400 is determined in accordance with the allowable pressure value of the abnormal overpressure . Accordingly, the spring 400 can adjust the vertical height of the valve cap 200 coupled to the upper side of the valve body 100, and the tension of the valve cap 200 can be adjusted. The elasticity coefficient of the spring is adjusted by adjusting the degree of compression of the spring 400 by rotating the valve cap 200 in a state where the male thread portion 210 of the valve cap is engaged with the valve cap 200. Here, the permissible pressure value is increased as the compression degree of the spring 400 is narrowed, and the allowable pressure value is decreased as the compression degree of the spring 400 is widened. When the valve cap 200 is coupled to the valve body 100 and the height adjustment of the valve cap 200 is completed, a nut N is coupled to the outer surface of the valve cap 200 to connect the valve cap 200 to the valve body 100. [ Are fixedly coupled.

An upper spring supporting part 500 is installed in the valve cap 200. The upper part of the upper spring supporting part 500 is in close contact with the inner surface of the valve cap 200, 400 are formed in the upper fitting protrusion 510. That is, the upper spring retainer 500 is configured to maintain the upper end of the spring 400 to prevent the spring 400 from tilting under pressure.

And a lower spring supporting part 600 is installed in the receiving part 320 of the valve disc. That is, the lower spring support 600 supports the lower end of the spring 400 and is configured to keep the spring 400 horizontal to prevent the spring 400 from tilting under pressure. The lower spring support portion 600 has a conical support protrusion inserted into the support groove 321 of the valve disc at the center of the lower surface of the lower spring support portion 600 so that the lower end of the lower spring support portion 600 is in close contact with the apex of the support groove 321, (610). That is, the elasticity of the spring 400 generated by the upward movement of the valve disc 300 is concentrated on the joint P between the support protrusion 610 and the support groove 321, And is configured to be movable up and down without eccentricity. The elastic force of the spring 400 is accurately transmitted to the center of the valve disc 300 which is the apex of the support groove 321 through the apex of the support protrusion 610 of the lower spring retainer, The valve disc 300 is opened and closed horizontally even if the lower spring support member 600 is eccentric within the valve disc 300. Therefore, the valve disc 300 can be stably and precisely opened and closed without abnormal operation of the valve disc 300 according to the eccentric load of the spring 400. [ Operation becomes possible. A lower fitting protrusion 620 is formed on an upper surface of the lower spring support 600 to receive the lower end of the spring 400.

In the meantime, according to the present invention, when an abnormal overpressure is suddenly introduced through the inlet 120, the valve can be rapidly exhausted to the outside of the valve body. To this end, the valve body 100 is formed with a rapid exhaust hole 170 communicating with the sliding hole 150 along the circumferential direction to the lower side of the female screw coupling portion 130. An overpressure inflow groove 180 is formed on the inner surface of the valve body 100 so as to extend from the upper side of the exhaust hole 161 to the inside of the rapid evacuation hole 170.

6, when an abnormal overpressure is rapidly introduced through the inlet 120 and the valve disc 300 is moved upward from the lower end of the over-pressure inflow groove 180, An excessive overpressure flows into the lower end of the overpressure inflow groove 180 and then moves along the overpressure inflow groove 180 and is rapidly exhausted to the outside of the valve body 100 through the rapid evacuation hole 170. Therefore, even if the over-pressure is abruptly generated in the storage tank or the pipeline 1, the over-overpressure is quickly discharged through the exhaust hole 161 and the rapid evacuation hole 170, It is possible to quickly remove excessive pressure generated in the first chamber 1.

According to the present invention, it is possible to adjust the discharge amount or discharge speed of the abnormal overpressure by controlling the number of openings of the exhaust hole 161 formed in the nut portion 160.

7 to 9, the nut part 160 is rotatably coupled to the outer surface of the valve body 100, and the upper end of the nut part 160 is coupled to the valve body 100, And the lower end of the nut 160 is supported by an annular lower support protrusion 182 formed on the outer surface of the valve body 110. The lower support protrusion 182 is formed on the outer surface of the valve body 110, The outer surface of the nut portion 160 is formed in a hexagonal shape, and the exhaust hole 161 is formed at an angle of 60 degrees on each end surface of the nut portion 160.

A reference groove 181a is formed on the bottom surface of the upper support step 181 and a three-segment standard reference groove 181b is formed at one side of the reference groove 181a at an angle of 15 degrees. A two-division-yarn reference groove 181c having an angle of -15 degrees is formed on the other side of the second division yarn 181a. When the nut portion 160 is rotated at an angle of 15 degrees in a state where the nut portion 160 is fitted and fixed in the reference groove 181a, the nut portion 160 is fitted and fixed in the 3-segment spacer reference groove 181a, The reference protrusions 162 to be fitted and fixed in the two-segment yarn reference grooves 181c are formed.

A communication hole 190 is formed in the outer surface of the valve body 100 to correspond to the exhaust hole 161 and selectively communicate with the exhaust hole 161 by rotation of the nut portion 160. The communication hole 190 includes a six-hole hole 191 communicating with all the exhaust holes 161a, 161b, 161c, 161d, 161e, and 161f when the reference projection 162 is inserted into the reference groove 181a, The nut member 160 is rotated at an angle of 15 degrees with respect to the valve body 160 so that the reference protrusion 162 is inserted and fixed in the three-segment thread groove 181b. The nut member 160 is rotated at an angle of about 15 degrees with respect to the valve body 100 so that the reference protrusion 162 contacts the two separator threaded grooves 181c, And a two-ported hole 193 communicating with the exhaust holes 161b and 161e located at 60 degrees and 240 degrees, respectively.

8, when the reference projection 162 is fitted in the reference groove 181a, as shown in Fig. 9, the exhaust holes 161a, 161b, 161c, 161d, 161e, and 161f and the six-way through hole 191 are communicated with each other so that abnormal overpressure is exhausted through all of the exhaust holes. 10, when the nut portion 160 rotates 15 degrees from the valve body 100 and the reference projection 162 is fitted and fixed in the three-segmented threaded reference groove 182b, as shown in FIG. 11, The exhaust holes 161b, 161d, and 161f located at 60 degrees, 180 degrees, and 300 degrees are communicated with the three-way through holes 192 so that abnormal overpressure is exhausted through the three exhaust holes. 12, when the nut portion 160 is rotated by -15 degrees from the valve body 100 and the reference projection 162 is fitted and fixed in the two-segment standard groove 182c, As shown in the drawing, the exhaust holes 161b and 161e located at 60 degrees and 240 degrees are communicated with the two-way through holes 193, so that the abnormal overpressure is exhausted through the two exhaust holes.

Therefore, in this embodiment, the nut portion 160 is rotated in the valve body 100 to adjust the number of communication between the exhaust hole 161 of the nut portion 160 and the communication hole 190, so that the exhaust hole of the nut portion is opened Therefore, it is possible to control the amount and speed at which the abnormal overpressure is exhausted through the exhaust hole of the nut portion.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Anyone who can afford it will know.

100: Valve body 200: Valve cap
300: valve disc 400: spring
500: upper spring portion 600: lower spring portion

Claims

And a female threaded portion is formed on an inner surface of an upper end of the female threaded portion. A support protrusion is formed on the upper side of the inlet protrusion, And a plurality of exhaust holes formed on an upper surface of the male screw coupling portion to communicate with the sliding holes in the circumferential direction to exhaust the abnormal overpressure to the outside, A valve body,
A valve cap coupled to the valve body so as to be vertically adjustable in height according to a degree of engagement with the female screw engagement portion;
And a receiving portion having a conical support groove formed at the center of the inner surface and having an outer surface in close contact with the sliding hole is formed at an upper end portion of the receiving portion, The valve disc is moved upward on the sliding hole to open the inlet port and exhaust the abnormal overpressure to the exhaust hole,
A spring interposed between the valve cap and the valve disc on the sliding hole to elastically press the valve disc downward;
An upper spring supporting member having an upper surface in close contact with an inner surface of the valve cap and having an upper fitting protrusion for supporting the upper end of the spring,
The valve disc is inserted into the accommodating portion and has a conical support protrusion inserted into the support groove of the valve disc at the center of the lower surface so as to be able to flow while the lower apex thereof is in contact with the apex of the support groove, The valve disc is movable in the up and down direction without eccentricity so that the elasticity of the spring generated by the movement is concentrated at the joint between the support protrusions and the support groove and the upper surface is provided with a lower fitting protrusion A spring-loaded region,
Wherein the nut portion is rotatably coupled to the outer surface of the valve body and the upper end of the nut portion is supported by an annular upper support jaw formed on the outer surface of the valve body and the lower end of the nut portion is formed with an annular lower portion And is supported by a support jaw,
Wherein an outer surface of the nut portion is formed of a hexagonal surface, and an exhaust hole is formed at each end surface of the nut portion at an angle of 60 degrees,
A reference groove is formed on the bottom surface of the upper support jaw, a three-division yarn reference groove having an angle of 15 degrees is formed on one side of the reference groove, and a two- A reference groove is formed,
The nut is fixed on the upper surface of the nut by being fixed to the reference groove. When the nut is rotated by 15 degrees, the nut is fitted and fixed in the reference groove of the separator. When the nut is rotated by 15 degrees, Is formed,
And a communicating hole formed in the outer surface of the valve body so as to correspond to the exhaust hole and selectively communicating with the exhaust hole by rotation of the nut portion, wherein the communicating hole communicates with all the exhaust holes when the reference protrusion is fitted into the reference groove, A three-way through hole communicating with the exhaust hole located at 60 degrees, 180 degrees, and 300 degrees when the nut protrudes from the valve body and the reference protrusion is fitted and fixed in the reference groove, And a two-liter through-hole communicating with the exhaust hole located at 60 degrees and 240 degrees when the reference projection is fixedly inserted into the reference groove of the second separator by rotating at an angle of -15 degrees.

The method according to claim 1,
Wherein the valve body has a rapid exhaust hole communicating with the sliding hole along a circumferential direction to a lower side of the female screw engagement portion,
An overpressure inflow groove extending from the upper side of the exhaust hole to the inside of the rapid evacuation hole is formed on the inner surface of the valve body,
Pressure inflow groove, and when the valve disc is moved upward from the lower end of the over-pressure inflow groove, an over-pressure is introduced into the lower end of the over-pressure inflow groove and then is moved along the over-pressure inflow groove, Wherein the valve is configured to be rapidly exhausted to the outside of the valve body through the valve.

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