JP2016183690A - safety valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety valve which inhibits high speed scattering of a massive closing material during operation.SOLUTION: A safety valve 1 includes: a body 100 including a through hole 110 which allows an interior part of a pipeline or container, in which a refrigerant is enclosed, and an exterior part to communicate with each other; a closing material 300 which is made of a material that gets soft at a predetermined temperature or higher, inserted into the through hole 110 of the body 100, and closes the through hole 110; and a scattering inhibition member 200 which is inserted into the through hole 110 of the body 100. The scattering inhibition member 200 includes: a shaft part 210 which is inserted into the through hole 110 and longer than the through hole 110; a head part 220 which is provided at the shaft part 210 located at an exterior part side of the pipeline or container and has an outer shape larger than a cross section of the shaft part 210 which is perpendicular to a longitudinal direction; and a tail part 230 which is provided at the shaft part 210 located at an interior part side of the pipeline or container and has an outer shape larger than an inner shape of the through hole 110.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a safety valve.

  In the conventional safety valve, it is connected to the flow path and includes a blocking housing portion (main body) and a metal blocking material, and the blocking material storage portion (main body) has a communication path that allows the flow path and the outside of the flow path to communicate with each other. It is known that a metal blocking material is accommodated in a communication path and closes the communication path (see, for example, Patent Document 1).

JP 2013-160355 A

  The conventional safety valve shown in Patent Document 1 is one in which the metal blocking material is melted to open the communication passage when operated. In such a conventional safety valve, as shown in FIG. 6, for example, the metal closure member 300 is partially melted and softened during operation, and the softening closure member 300 is plastically deformed by the pressure of a refrigerant or the like to cause the body of the safety valve. There is a possibility of jumping out from 100 at high speed.

  This invention was made in order to solve such a subject, and obtains the safety valve which can suppress that a block-like obstruction | occlusion material scatters at high speed at the time of the action | operation of a safety valve.

  In the safety valve according to the present invention, the safety valve according to the present invention is composed of a main body in which a through-hole that passes through the inside or outside of a pipe or container in which a refrigerant is sealed, and a material that softens at a predetermined temperature or more, A blocking material that is inserted into the through hole and closes the through hole; and a scattering suppression member that is passed through the through hole of the main body, and the scattering suppression member is passed through the through hole. A shaft portion longer than the through-hole, a head portion provided on the shaft portion on the outside of the pipe or the container, and having an outer shape larger than a cross section perpendicular to the longitudinal direction of the shaft portion, and the interior of the pipe or the container And a tail portion provided on the shaft portion on the side and having an outer shape larger than the inner shape of the through hole.

  In the safety valve according to the present invention, there is an effect that it is possible to suppress the massive blockage material from being scattered at a high speed when the safety valve is operated.

It is sectional drawing of the safety valve which concerns on Embodiment 1 of this invention. It is a perspective view of the scattering suppression member with which the safety valve concerning Embodiment 1 of this invention is provided. It is a figure which illustrates typically the relationship between the magnitude | size of the main body of the safety valve which concerns on Embodiment 1 of this invention, and a scattering suppression member. It is a figure explaining the apparatus used for the action | operation experiment of the safety valve which concerns on Embodiment 1 of this invention. It is a figure explaining the mode at the time of the action | operation of the safety valve which concerns on Embodiment 1 of this invention. It is a figure explaining the mode at the time of the action | operation of the conventional safety valve.

  The present invention will be described with reference to the accompanying drawings. The same reference numerals denote the same or corresponding parts throughout the drawings. The overlapping description of the same reference numerals will be simplified or omitted as appropriate.

Embodiment 1 FIG.
1 to 5 relate to Embodiment 1 of the present invention, FIG. 1 is a sectional view of a safety valve, FIG. 2 is a perspective view of a scattering suppression member provided in the safety valve, and FIG. 3 is a main body of the safety valve and a scattering suppression member. FIG. 4 is a diagram for explaining a device used for an operation experiment of a safety valve, and FIG. 5 is a diagram for explaining a state during operation of the safety valve.

  A safety valve 1 according to the present invention shown in FIG. 1 is a so-called fusible stopper, which is a liquid stopper type safety valve that is a type of safety valve. The safety valve 1 is attached to a pipe or a container in which a refrigerant is sealed. A through hole 110 is formed in the main body 100 of the safety valve 1. The through hole 110 passes through the inside or outside of the pipe or container to which the main body 100 is attached. Here, the through hole 110 is provided in the center of the main body 100. The cross-sectional shape perpendicular to the longitudinal direction of the through hole 110 is, for example, a circle.

  The safety valve 1 includes a scattering suppression member 200. The scattering suppression member 200 is provided to pass through the through hole 110 of the main body 100. A blocking material 300 is also inserted into the through hole 110 of the main body 100. The closing material 300 closes the through hole 110.

  Since the scattering suppressing member 200 and the blocking material 300 are placed in the through hole 110, more precisely, the blocking material 300 is filled in the through hole 110 excluding the scattering suppressing member 200. In other words, it can also be said that the scattering suppressing member 200 (a part thereof) is embedded in the blocking material 300 inserted into the through hole 110.

  The closing material 300 is made of a material that softens at a predetermined temperature or higher. As a material constituting the closing material 300, for example, a metal having a low melting point or a soluble alloy such as solder can be used. The plugging material 300 is solid under a temperature environment lower than a predetermined temperature, and melts when the temperature becomes equal to or higher than the predetermined temperature. Specifically, the temperature at which the closing material 300 is softened is set to about 65 to 75 ° C., for example.

  A protective film 400 is provided on the inner surface of the piping or container of the closing material 300. As described above, the refrigerant is sealed in the pipe or the container. When a solder alloy containing tin is used as the occluding material 300, the occluding material 300 may react with a refrigerant such as fluorocarbon and corrode. Therefore, by forming the protective film 400 on the side of the plugging material 300 facing the refrigerant, contact and reaction between the refrigerant and the plugging material 300 can be prevented. In order to achieve such an object, a protective film 400 having a low reactivity (high corrosion resistance) with a refrigerant such as a fluorocarbon such as a fluororesin is used.

  Next, the configuration of the scattering suppressing member 200 will be described in detail with reference to FIG. As shown in FIG. 2, the scattering suppression member 200 includes a shaft portion 210, a head portion 220, and a tail portion 230. The shaft part 210 is an elongated columnar member, that is, a shaft member. A head portion 220 is provided at one end of the shaft portion 210. The head 220 has, for example, a truncated cone shape (conical frustum shape) with the tip cut off. Here, the head 220 is provided in such a direction that it is wider as it is closer to the shaft portion 210 and is narrower as it is farther from the shaft portion 210.

  A tail portion 230 is provided at the other end of the shaft portion 210. The tail 230 has a thin disk shape. A tail through hole 231 is formed in the tail 230. One or more tail through holes 231 are provided, and here, four tail through holes 231 are provided. Each tail portion through-hole 231 passes through the tail portion 230 in the longitudinal direction of the shaft portion 210.

  Next, the positional relationship between the scattering suppressing member 200 and the main body 100 attached to the main body 100 and the relationship between the sizes of the respective parts will be described with reference to FIG. As described above, the through hole 110 is formed in the center of the main body 100. The through-hole 110 passes through the inner side of the pipe or container (hereinafter simply referred to as the inner side) to which the safety valve 1 is attached and the outer side of the pipe or container (hereinafter also referred to simply as the outer side).

  The inner diameter and the outer side of the through hole 110 are wider than the through hole 110. That is, the inner side stepped portion 111 is formed at the inner end of the through hole 110. An inlet 120 is formed inside the through hole 110. An external step 112 is formed at the outer end of the through hole 110. An outlet 130 is formed outside the through hole 110.

  The inner shape of the inlet portion 120 is larger than the inner shape of the through hole 110. The inner shape of the outlet portion 130 is also larger than the inner shape of the through hole 110. Here, the inner shape of the inlet portion 120 is smaller than the inner shape of the outlet portion 130. Here, the dimension of the outlet portion 130 in the direction orthogonal to the penetration direction of the through hole 110 is A, the dimension of the direction orthogonal to the penetration direction of the through hole 110 is B, and the inlet portion in the direction orthogonal to the penetration direction of the through hole 110. Let 120 be the dimension C. Then, the opening of the inner shape of the through hole 110, the inlet portion 120, and the outlet portion 130 described above is A> B, C> B, and C> A. Therefore, when these are put together, A, B, and C have a relationship of C> A> B.

  As described above, the scattering suppressing member 200 is passed through the through hole 110 of the main body 100. At this time, the shaft portion 210 of the scattering suppressing member 200 is disposed in the through hole 110. Therefore, the outer shape of the shaft portion 210 is smaller than the inner shape of the through hole 110. That is, the cross section perpendicular to the longitudinal direction of the shaft portion 210 is smaller than the cross section perpendicular to the through direction of the through hole 110. Here, both the cross section of the shaft portion 210 and the cross section of the through hole 110 are circular. Therefore, if the dimension in the direction orthogonal to the longitudinal direction of the shaft portion 210 is b, b <B. The shaft portion 210 is longer than the through hole 110. That is, d> D where d is the length dimension of the shaft portion 210 in the longitudinal direction and D is the length dimension of the through hole 110 in the penetration direction.

  As described above, the head portion 220 is provided at one end of the shaft portion 210, and the tail portion 230 is provided at the other end of the shaft portion 210. The shaft portion 210 is disposed through the through-hole 110 so that the head portion 220 is on the outer side and the tail portion 230 is on the inner side. Therefore, the head portion 220 is disposed in the space of the outlet portion 130, and the tail portion 230 is disposed in the space of the inlet portion 120. Thus, the head portion 220 is provided on the outer shaft portion 210, and the tail portion 230 is provided on the inner shaft portion 210.

  The head 220 has an outer shape larger than a cross section perpendicular to the longitudinal direction of the shaft portion 210. That is, if the dimension of the head 220 in the direction orthogonal to the longitudinal direction of the shaft portion 210 is a, a> b. Here, the head 220 further has an outer shape larger than the inner shape of the through hole 110. That is, a> B. In addition, since the head 220 is in the exit part 130, a <A.

  Further, the tail 230 has an outer shape larger than the inner shape of the through hole 110. That is, if the dimension of the tail portion 230 in the direction orthogonal to the longitudinal direction of the shaft portion 210 is c, c> B. Since head 220 is in entrance 120, c <C is also established.

  The closing material 300 is inserted into the through hole 110 after the main body 100 and the scattering suppressing member 200 are in the above-described position and size relationship. The closing member 300 is filled in all of the gaps between the inner wall of the through hole 110 and the scattering suppressing member 200 and most of the inlet 120, and is in the state shown in FIG.

  Next, the operation of the safety valve 1 configured as described above will be described. First, FIG. 4 shows an apparatus for performing an operation experiment of the safety valve 1. As shown in FIG. 4, water 502 is placed in the pool 501. A heater 503 is placed in the water 502. The heater 503 is connected to the slidac 504. The temperature of the water 502 can be adjusted by operating the slider 504 to change the current flowing through the heater 503 and adjusting the amount of heat generated by the heater 503.

  A refrigerant is sealed in the cylinder 505. One end of a copper pipe 507 is connected to the cylinder 505 through a pressure reducing valve 506. The other end of the copper pipe 507 is connected to the safety valve 1 that is the subject of the experiment. The safety valve 1 is submerged in the water 502 of the pool 501. At this time, it is desirable that the direction of the safety valve 1 is such that the outer side of the main body 100, that is, the outlet 130 is downward. In addition, if the safety valve 1 is replaced with a conventional fusible stopper, an operation experiment can be performed for the conventional fusible stopper.

  In the apparatus configured as described above, the temperature of the water 502 is gradually increased by operating the slidac 504 while stirring appropriately so that the temperature of the water 502 in the pool 501 becomes uniform. Then, the operating temperature of the safety valve 1 is maintained slightly higher. Then, the situation where the safety valve 1 operates and the blocking material 300 is ejected from the safety valve 1 can be observed. Further, the state of the refrigerant discharged from the safety valve 1 can also be observed from the state of bubbles ejected from the safety valve 1.

  The state at the time of the action | operation of the safety valve 1 observed using this apparatus is demonstrated, referring FIG.1 and FIG.5. First, the state before the operation of the safety valve 1 is as shown in FIG. Here, as described above, the shaft portion 210 of the scattering suppressing member 200 is longer than the through hole 110, and the dimension “a” of the head portion 220 and the dimension “c” of the tail portion 230 are larger than the dimension “B” of the through hole 110. For this reason, in a state where the blocking material 300 is not filled in the through hole 110, the scattering suppression member 200 can move back and forth by a certain amount along the through direction of the through hole 110. Note that the amount by which the scattering suppressing member 200 can move is the difference (d−D) between the lengths of the shaft portion 210 and the through hole 110.

  As shown in FIG. 1, before the safety valve 1 is actuated, the scattering suppression member 200 is arranged at a position on the inner side as much as possible within a movable range. Then, the closing material 300 is filled up to the inlet portion 120, and the tail portion 230 of the scattering suppressing member 200 is embedded in the closing material 300.

  When the temperature around the safety valve 1 (the temperature of water 502 in the experimental apparatus of FIG. 4) becomes equal to or higher than the operating temperature of the safety valve 1, the closing material 300 is softened. When the blocking material 300 is softened and cannot resist the pressure of the refrigerant inside the safety valve 1, the protective film 400 is broken by the pressure of the refrigerant and the blocking material 300 is pushed out of the through hole 110.

  Here, as described above, the dimension a of the shaft part 210 is larger than the dimension b of the shaft part 210. Therefore, the blocking material 300 in the through hole 110 is ejected while hitting the head 220 of the scattering suppressing member 200. For this reason, the blocking material 300 to be ejected is plastically deformed by the scattering suppressing member 200 or is divided so that it does not become a lump. Moreover, the momentum of ejection is reduced by hitting the scattering suppression member 200. Therefore, it is possible to suppress the blocking material 300 from being massively scattered at high speed when the safety valve 1 is operated.

  When the blocking material 300 is ejected to the outside and the through hole 110 is opened, the refrigerant inside the safety valve 1 enters the through hole 110 from the inlet 120. Then, the refrigerant is discharged to the outside of the safety valve 1 through the outlet portion 130. In this way, when the temperature of the surrounding environment rises above a predetermined temperature, the safety valve 1 can be activated to release the pressure of the refrigerant in the pipe or container.

  As described above, the scattering suppressing member 200 is movable along the through direction of the through hole 110. Before the safety valve 1 is actuated, the scattering suppression member 200 is fixed by the closing material 300 at a position inside the movable range. When the safety valve 1 is operated, the closing member 300 is softened and the position of the scattering suppressing member 200 is released. Therefore, the scattering suppression member 200 is pushed by the refrigerant and the blocking material 300 and moves to the outside. Then, the clearance gap between the edge part by the side of the exit part 130 of the through-hole 110 and the head 220 of the scattering suppression member 200 spreads. For this reason, the scattering material 200 is blocked between the through-hole 110 and the head portion 220 of the scattering material 200 while suppressing the material 300 from being released at a high speed as a lump. Can be prevented.

  In addition, since the tail portion 230 is formed with the tail portion through-hole 231, the pressure of the refrigerant is applied to the blocking material 300 in the through-hole 110 through the tail portion through-hole 231. Therefore, the blocking material 300 is smoothly and reliably discharged from the through hole 110 when the temperature rises, and the safety valve 1 is operated. Further, since the tail through hole 231 is formed, the tail hole 230 closes the through hole 110 even if the scattering suppressing member 200 moves until the tail 230 hits the end of the through hole 110 on the inlet portion 120 side. Therefore, it is possible to smoothly discharge the refrigerant to the outside through the tail through hole 231.

  Note that the safety valve 1 configured as described above, for example, heats and melts and removes the conventional fusible plug closure material that does not include the scattering suppression member as shown in FIG. And it can manufacture by attaching the scattering suppression member of a shape and a magnitude | size as shown in FIG. 2 and 3 can be easily manufactured, for example, by processing into a desired shape and size based on resin screws and nuts. Is possible.

  The safety valve configured as described above is composed of a main body 100 in which a through-hole 110 is formed through a pipe or a container in which a refrigerant is enclosed, and the inside and outside of the container, and a material that softens at a predetermined temperature or more. The closing member 300 is inserted into the through hole 110 of the main body 100 to close the through hole 110, and the scattering suppressing member 200 is passed through the through hole 110 of the main body 100. The scattering suppressing member 200 is passed through the through hole 110 and is provided in the shaft part 210 longer than the through hole 110 and the shaft part 210 on the outside of the pipe or the container, and a cross section perpendicular to the longitudinal direction of the shaft part 210. A head portion 220 having a larger outer shape and a tail portion 230 provided in the shaft portion 210 on the inner side of the pipe or container and having a larger outer shape than the inner shape of the through-hole 110 are provided.

  For this reason, the blocking material 300 softened during the operation of the safety valve 1 interferes with the scattering suppressing member 200, and the massive blocking material 300 can be prevented from scattering at high speed when the safety valve 1 is operated. In addition, since this is not affected by the mounting direction of the safety valve 1, high-speed scattering of the blocky blocking material 300 during operation can be suppressed regardless of the mounting direction of the safety valve 1.

  If the dimension “a” of the head part 220 is at least larger than the dimension “b” of the shaft part 210, the release of the blocking material 300 is inhibited by the head part 220, so that the blocky blocking material 300 is scattered at a high speed when the safety valve 1 is operated. It is possible to obtain the above-described effect of suppressing the occurrence. Here, in principle, increasing the dimension “a” of the head 220 increases the effect of inhibiting the release of the blocking material 300, so that high-speed scattering of the blocky blocking material 300 can be further suppressed. However, if the release of the blocking material 300 is too hindered, there is a risk of hindering smooth pressure release. Therefore, it is preferable that the dimension a of the head 220 is determined based on the balance of these factors.

  However, as described in the above embodiment, when the dimension a of the head 220 is slightly larger than the width B of the through hole 110, the dimension c of the tail 230 is also larger than the width B of the through hole 110. It is possible to prevent the scattering suppressing member 200 from coming out of the through hole 110. By doing in this way, since the main body 100 and the scattering suppression member 200 do not separate, it is possible to facilitate handling and improve convenience.

  DESCRIPTION OF SYMBOLS 1 Safety valve, 100 Main body, 110 Through-hole, 111 Inner side step part, 112 Outer side step part, 120 Inlet part, 130 Outlet part, 200 Splash suppression member, 210 Shaft part, 220 Head part, 230 Tail part, 231 Tail part through hole , 300 occluding material, 400 protective film, 501 pool, 502 water, 503 heater, 504 slidac, 505 cylinder, 506 pressure reducing valve, 507 copper piping

Claims (3)

A main body in which a through-hole is formed through the inside or outside of a pipe or container in which a refrigerant is sealed;
It is made of a material that softens at a predetermined temperature or higher, and a closing material that is inserted into the through hole of the main body and closes the through hole;
A scattering suppression member passed through the through hole of the main body,
The scattering suppression member is
A shaft that is passed through the through hole and is longer than the through hole;
A head having an outer shape larger than a cross section perpendicular to the longitudinal direction of the shaft provided on the shaft of the pipe or the container on the outside;
A safety valve comprising: a tail portion provided on the shaft portion on the inner side of the pipe or the container and having an outer shape larger than the inner shape of the through hole.   The safety valve according to claim 1, wherein a hole that penetrates the tail portion in a longitudinal direction of the shaft portion is formed in the tail portion.   The safety valve according to claim 1, wherein the head has an outer shape larger than an inner shape of the through hole.

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