JP7384942B2 - rupture disc device - Google Patents

Description

The present invention relates to a rupture disc device installed in a furnace body, piping, etc.

Conventionally, in case the atmospheric gas in the furnace were to ignite for some reason and cause an explosion, the furnace body, pipes, and other conduits had sections that were more likely to burst than other parts to allow the blast to escape safely. For example, Patent Document 1 discloses a configuration in which a rupture plate is a rupture plate in which thin aluminum plates are stretched and attached to an opening in a flange. As means for detecting the rupture of such a rupture disc, configurations as shown in Patent Documents 2 and 3 are disclosed.

Utility Model Publication No. 51-21398 Japanese Unexamined Patent Publication No. 52-57875 Utility Model Publication No. 1-136477 Publication No. 49-26439 Utility Model Publication No. 1-141973

However, in reality, rupture discs often rupture due to corrosion or deterioration of the rupture disc rather than an explosion of atmospheric gas, and additional problems such as corrosion or deterioration of the rupture disc tend to arise. . Therefore, although Patent Document 4 discloses a configuration for preventing corrosion of the rupture disc, this only extends the life of the rupture disc. Further, Patent Document 5 discloses a configuration in which double rupture discs are provided and detection is made before the second rupture disc ruptures due to pressure fluctuations between the rupture discs, but this makes the structure complicated. The problem arises of becoming.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a rupture disc device that can detect signs of rupture of a rupture disc due to corrosion or deterioration of the rupture disc with a simple configuration.

The present invention is a rupture disc device, comprising:
a rupture disc provided in a conduit and blocking the inside of the conduit;
a vibration measuring device located downstream of the rupture disc in a conduit and measuring vibration of the rupture disc;
The vibration measuring device is configured to measure vibrations in the thickness direction of the rupture disc.

According to the configuration, the vibration measurement device measures the vibration in the thickness direction of the rupture disc, so that signs of the rupture disc rupturing due to corrosion or deterioration of the rupture disc can be detected with a simple configuration.

It is preferable that the present invention further includes the following configuration.
(1) The rupture disc device according to claim 1, wherein the vibration measuring device is configured to issue a warning when the displacement of vibration in the thickness direction of the rupture disc exceeds a predetermined value.

(2) The vibration measuring device is a contact-type vibration measuring device that brings a measuring element into contact with the rupture disc.

(3) the rupture disc device includes a mounting plate located downstream of the rupture disc in the conduit and to which the vibration measurement device is attached;
The vibration measuring device includes a main body and a measuring element,
The main body portion is located downstream of the mounting plate in the conduit.

(4) The rupture disc device includes an isolation valve that is located upstream of the rupture disc and opens and closes the pipe,
The isolation valve closes the conduit when replacing the rupture disc.

According to the configuration (1), by issuing a warning when the displacement of the vibration of the rupture disc exceeds a predetermined value, signs of the rupture can be detected before the rupture disc bursts, and the rupture disc can be replaced in advance. It can be carried out.

According to the configuration (2), by bringing the probe into contact with the rupture disc, vibration of the rupture disc can be suppressed, and the life of the rupture disc can be extended.

According to the configuration (3), by arranging the main body of the vibration measuring device on the downstream side of the conduit of the mounting plate, it is possible to prevent atmospheric gas in the furnace from directly colliding with the main body when the rupture disc ruptures. Can be suppressed by mounting plate.

According to the configuration (4), the rupture disc can be easily replaced by closing the pipeline with the isolation valve.

In short, according to the present invention, it is possible to provide a rupture disc device that can detect signs of rupture of a rupture disc due to corrosion or deterioration of the rupture disc with a simple configuration.

1 is a schematic cross-sectional view of a rupture disc device according to an embodiment of the present invention. It is a front view of a rupture disc. FIG. 3 is a schematic cross-sectional view of a rupture disc device according to another embodiment of the present invention.

FIG. 1 is a schematic cross-sectional view of a rupture disc device 10 according to an embodiment of the present invention. As shown in FIG. 1, the rupture disc device 10 is provided on the nozzle stub 2 side of the piping 1 of the furnace body. The rupture disc device 10 includes a rupture disc 3 that is installed in a pipe and blocks the inside of the pipe, and a vibration measuring device 4 that is located downstream of the rupture disc 3 in the pipe and measures vibrations of the rupture disc 3. It is equipped with

A flange 5 is provided on the downstream side of the pipeline of the nozzle stub 2, and the rupture disc 3 is sandwiched between the flange 21 formed at the downstream end of the pipeline of the nozzle stub 2 and the flange 5, It is tightened and fixed with bolts 6. The material for the rupture disc 3 is selected based on the environment inside the furnace, and aluminum is generally used as it has good malleability and high corrosion resistance, but when used at high temperatures and high pressures, for example, stainless steel can be used. Steel, nickel steel, etc. are used. The rupture disc 3 does not deform when the inside of the furnace is in normal use, but has a thickness such that it ruptures by shearing only when a sudden increase or decrease in pressure due to rupture occurs. FIG. 2 is a front view of the rupture disc 3. The rupture disc 3 has a disc shape, and has, for example, four holes 31 formed at equal intervals in the circumferential direction, into which the bolts 6 are inserted. Note that the dotted line indicates the position of the opening of the nozzle 2.

A support 7 is provided on the downstream side of the flange 5 in the pipeline, and one end of the support 7 is fixed to the flange 5. A mounting plate 8 to which the vibration measuring device 4 is attached is fixed to the other end of the support column 7. The pillars 7 have a rod shape, and for example, four pillars are provided at equal intervals.

The vibration measuring device 4 includes a main body portion 41 and a measuring element 42, and the main body portion 41 is attached to the upstream surface of the mounting plate 8 on the pipe top side (the lower surface in the figure). The vibration measuring device 4 is a contact-type vibration measuring device, and the measuring tip 42 extends from the main body 41 to the upstream side of the pipe, and the tip of the measuring tip 42 comes into contact with the center of the rupture disc 3. ing. The vibration measuring device 4 measures the vibration of the rupture disc 3 based on the displacement of the center of the rupture disc 3 in the thickness direction, the displacement speed, the displacement acceleration, etc. The vibration measuring device 4 is configured to issue a warning when the vibration displacement of the rupture disc 3, for example in the thickness direction, exceeds a predetermined value. When the rupture disc 3 ruptures as its original function, it ruptures all at once, but if its strength is lost due to deterioration or corrosion, the rupture disc 3 in a taut, horizontal state may become concave or convex due to the pressure inside the furnace. The rupture disc 3 also begins to vibrate as a result of the force exerted to deform it, causing elongation across the entire surface, which is then affected by the vibrations of the operating equipment inside the furnace. The rupture disc device 10 utilizes this phenomenon and detects the signs of rupture of the rupture disc 3 by detecting the vibration of the rupture disc 3 with the vibration measuring device 4. Note that when the rupture disc 3 ruptures due to its original action, the blast wave is released from the gap between the support columns 7 to the outside.

The rupture disc device 10 is located upstream of the rupture disc 3 on the conduit and includes an isolation valve 11 that opens and closes the conduit. The isolation valve 11 is designed to close the pipeline when the rupture disc 3 is replaced.

According to the rupture disc device 10 having the above configuration, the following effects can be achieved.

(1) By using the vibration measurement device 4 to measure vibrations in the thickness direction of the rupture disc 3, signs of the rupture disc 3 rupturing due to corrosion or deterioration of the rupture disc 3 can be detected with a simple configuration. .

(2) The vibration measuring device 4 is designed to issue a warning when the displacement of the vibration in the thickness direction of the rupture disc 3 exceeds a predetermined value, so that the vibration measurement device 4 issues a warning before the rupture disc 3 ruptures. Symptoms can be detected and the rupture disc can be replaced in advance.

(3) Since the vibration measuring device 4 is a contact-type vibration measuring device in which the gauge head 42 is brought into contact with the rupture disc 3, the vibration of the rupture disc 3 is suppressed by bringing the gauge head 42 into contact with the rupture disc 3. Therefore, the life of the rupture disc 3 can be extended. Note that by bringing the probe 42 into contact with the center of the rupture disc 3, the vibration of the rupture disc 3 can be further suppressed compared to the case where it is brought into contact with the periphery.

(4) The rupture disc device 10 is located upstream of the rupture disc 3 and is equipped with an isolation valve 11 that opens and closes the pipeline, so by closing the pipeline with the isolation valve 11, the rupture disc 3 can be easily replaced.

(5) The rupture disc 3 has a disc shape, and the holes 31 through which the bolts 6 are inserted are formed at equal intervals in the circumferential direction on the periphery, so that the vibration displacement at the center of the rupture disc 3 is configured to maximize. Therefore, by bringing the probe 42 of the vibration measuring device 4 into contact with the center of the rupture disc 3, the vibration of the rupture disc 3 can be effectively suppressed.

FIG. 3 is a schematic cross-sectional view of a rupture disc device 10 according to another embodiment of the invention. Another embodiment differs from the above embodiment in that the vibration measuring device 4 is a non-contact type vibration measuring device, and the other configurations are the same as the above embodiment. Therefore, in the description of another embodiment, the same parts as in the above embodiment are given the same reference numerals, and detailed description of their contents will be omitted.

As shown in FIG. 3, the vibration measuring device 4 includes a main body 43 and a measuring element 44, and the main body 43 is attached to the downstream surface of the pipe 8 (upper surface in the figure) of the mounting plate 8. There is. The vibration measuring device 4 is a non-contact type vibration measuring device, and the measuring tip 44 extends from the main body 43 to the upstream side of the pipe, and the tip of the measuring tip 44 is spaced apart from the rupture disc 3 by a predetermined space. , is located on the upstream side of the pipe of the mounting plate 8. The center of the rupture disc 3 is located in the extending direction of the probe 44. The vibration measuring device 4 measures the vibration of the rupture disc 3 based on the displacement of the center of the rupture disc 3 in the thickness direction, the displacement speed, the displacement acceleration, etc. The vibration measuring device 4 is configured to issue a warning when the vibration displacement of the rupture disc 3, for example in the thickness direction, exceeds a predetermined value.

According to the above configuration, the main body 43 of the vibration measuring device 4 is located on the downstream side of the pipe line of the mounting plate 8, so that when the rupture disc 3 ruptures, the atmospheric gas in the furnace is Direct collision with the main body 41 of the device 4 can be suppressed by the mounting plate 8. As a result, the possibility that the main body portion 43 is damaged by atmospheric gas can be reduced.

In the above embodiment, the main body 41 of the contact type vibration measuring device 4 is located on the upstream side of the pipe line of the mounting plate 8, and the main body part 43 of the non-contact type vibration measuring device 4 is located on the downstream side of the pipe line of the mounting plate 8. However, the main body of the contact type vibration measuring device 4 is located on the downstream side of the conduit of the mounting plate 8, and the main body of the non-contact type vibration measuring device is located on the conduit of the mounting plate 8. It may be located on the stream side.

Various modifications and changes may be made without departing from the spirit and scope of the invention as set forth in the claims.

The present invention has great industrial utility value because it can provide a rupture disc device that can detect signs of rupture of a rupture disc due to corrosion or deterioration of the rupture disc with a simple configuration.

1 Piping
2 Nozzle stand
21 Flange
3 Rupture disc
4 Vibration measuring device
41 Main body 42 Measuring head
43 Main body 44 Measuring head
5 Flange
6 bolts
7 Pillars
8 Mounting plate
10 Rupture disc device

Claims (4)

A rupture disc device,
a rupture disc provided in a conduit and blocking the inside of the conduit;
a vibration measuring device located downstream of the rupture disc in a conduit and measuring vibration of the rupture disc;
The vibration measuring device is configured to measure vibration in the thickness direction of the rupture disc,
The rupture disc device includes a mounting plate located downstream of the rupture disc in the conduit and to which the vibration measurement device is attached,
The vibration measuring device includes a main body and a measuring element,
The rupture disc device , wherein the main body portion is located downstream of the mounting plate in the conduit .
The rupture disc device according to claim 1, wherein the vibration measuring device is configured to issue a warning when the displacement of vibration in the thickness direction of the rupture disc exceeds a predetermined value.
The rupture disc device according to claim 1 or 2, wherein the vibration measurement device is a contact type vibration measurement device that brings a probe into contact with the rupture disc.
The rupture disc device includes an isolation valve that is located upstream of the rupture disc and opens and closes the pipe,
The rupture disc device according to any one of claims 1 to 3 , wherein the isolation valve closes the conduit when replacing the rupture disc.

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