JPH11315959A - Pipe supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost and compact pipe supporting device capable of surely restricting or freely moving a pipe as occasion demands. SOLUTION: This pipe supporting device is constructed in such a manner that a casing 4 is provided in a frame 2, a raised/lowered body 7 is inserted into the opening part 4a of the casing 4 by a spring 6, a recessed part 9a engaged with a protruded part 7c in the upper surface side of the raised/lowered body 7 by the pressing force of the spring 6 is provided in a plate body 9 in the surface of a pipe, and the pipe 8 is provided with a temperature sensor 10 and a connecting tube 11 communicated from the pipe 8 to the inside of the raised/lowered body 7. In the midway of the connecting tube 11, an opening/ closing valve 13 opened/closed by a signal from the temperature sensor 10 is provided to introduce fluids into the raised/lowered body 7 and, by fluid pressure, the raised/lowered body 7 is pressed down into the opening part 4a, and the protruded part 7c is disengaged from the recessed part 9a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a nuclear power plant,
The present invention relates to a tube support device used in thermal power generation facilities, various petroleum / chemical plant facilities, and the like.

[0002]

2. Description of the Related Art In nuclear power generation facilities, thermal power generation facilities, various petroleum / chemical plant facilities, etc., a safety valve is provided in the middle of a piping path for a high-temperature and high-pressure fluid, and a discharge pipe is further provided in the safety valve. . In an emergency, the fluid is discharged out of the system through a discharge pipe via a safety valve.

Conventionally, a mechanical vibration isolator, a hydraulic vibration isolator, and the like have been used as such a supporting device for the discharge pipe, and the supporting device restricts the discharge pipe at the time of blowing out the fluid, that is, at the time of blowdown. The discharge pipe is supported in a state where the restraint of the discharge pipe is released when the pipe is thermally expanded.

For example, a mechanical vibration isolator has a ball screw and a ball nut, and a vibration isolator main body. The vibration isolator main body includes a brake drum connected to one end of the ball screw and a brake shoe. Consisting of The brake drum side is connected to a fixed base, and the ball nut side is connected to a discharge pipe via a pipe clamp or the like. The above-mentioned brake drum is configured separately from the brake shoe in the mounted state, so that when a sudden vibration such as an earthquake, that is, when the input acceleration of the ball nut is large, the brake drum becomes integral with the brake shoe so that the inertia mass increases and the braking force is applied. When the ball nut is moved due to thermal expansion or the like, that is, when the input acceleration of the ball nut is small, it is separate from the brake shoe and follows the ball nut without the application of a braking force.

[0005]

According to the above-mentioned conventional structure, the mechanical vibration isolator is large in size, and it is difficult to install the mechanical vibration isolator in a dense space where a plurality of pipes intersect. There is a problem.

[0006] Further, there is a problem that the cost increases when the mechanical vibration isolator is manufactured so that the braking force acts according to the difference in the input acceleration applied to the ball nut.

[0007] In addition, the hydraulic vibration isolator is also generally expensive, and when the fluid is rapidly discharged such as accompanied by a shock wave, the hydraulic vibration isolator has a poor behavior due to the response characteristics of the hydraulic oil. There is a problem that a certain operation cannot be expected due to a delay.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a low-cost and compact support device for a tube, which can securely restrain or freely move the tube as required.

[0009]

In order to solve the above-mentioned problems, a tube supporting device according to a first aspect of the present invention is provided with a casing having an opening formed on an upper surface thereof on a gantry side, An elevating body is inserted into the opening of the casing via an urging member, and an engaging portion is provided on the upper surface side of the elevating body, and the engaging member is engaged with the engaging portion by the urging force of the urging member. An engaging portion is provided on the surface of the tubular body, a temperature detecting means is provided on the tubular body, and pressing means for receiving a signal from the temperature detecting means to push down the elevating body into the opening of the casing is provided. Thus, the engagement state between the engagement portion and the engaged portion can be released.

According to a second aspect of the present invention, there is provided a tube supporting apparatus, wherein a casing having an opening formed on an upper surface thereof is provided on a gantry side, and an elevating member is provided in the opening of the casing via an urging member. And an engaging portion is provided on the upper surface side of the elevating body, and an engaged portion to be engaged with the engaging portion by the urging force of the urging member is provided on the surface of the tubular body. A temperature detecting means, and a connecting pipe communicating from the pipe to the inside of the elevating body, and an on-off valve that can be opened and closed by a signal from the temperature detecting means is provided in the middle of the connecting pipe, and It is configured such that a fluid is introduced into the inside, and by the pressure of the introduced fluid, the elevating body is pushed down into the opening of the casing, so that the engaged state between the engaging portion and the engaged portion can be released. It was done.

Further, at least one of the gantry and the casing has an elongated hole formed therein, and a connector is inserted into the elongated hole to connect the gantry and the casing. According to each of the above configurations, in normal times, the engagement portion of the lifting / lowering body and the engaged portion of the tube are engaged by the urging force of the urging member, so that the support device surely holds the tube. Restrained. On the other hand, when the pressure of the fluid in the pipe becomes equal to or higher than the set value, the safety valve operates to discharge the fluid from the pipe. At the time of this discharge, a large force acts on the pipe, for example, in the axial direction. However, since the engaging portion of the elevating body and the engaged portion of the tube are engaged by the urging force of the urging member, the tube is It is definitely supported.

When the temperature of the fluid discharged from the tube is high or when the temperature of the tube is high, the temperature detecting means detects the temperature,
The pressing means or the opening / closing valve receives a signal from the temperature detecting means and introduces a fluid into the elevating body. The elevating body is pushed down into the casing by the pressure of the introduced fluid, and the engagement between the engaging part of the elevating body and the engaged part of the tube is released.
Thus, the tube slides freely without being restrained by the support device, and it is possible to prevent the thermal stress from being generated in the tube.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a state in which a device for supporting a pipe according to an embodiment of the present invention is applied to a discharge pipe provided with a safety valve in the middle of a fluid piping path. This support device supports the own weight of the discharge tube and follows the thermal displacement to reliably restrain the discharge tube.

That is, the supporting device is provided with a casing having an opening formed on an upper surface thereof on a mount side, and a lifting member is inserted into the opening of the casing via an urging member. In addition to providing an engaging portion, an engaged portion to be engaged with the engaging portion by the urging force of the urging member is provided on the surface of the discharge tube. A connecting pipe communicating with the inside of the elevating body is provided, and an on-off valve that can be opened and closed by a signal from the temperature detecting means is provided in the middle of the connecting pipe to introduce a fluid into the elevating body. The support device can be made compact by pressing the lifting body down into the opening of the casing by the pressure of the introduced fluid so that the engagement between the engagement portion and the engaged portion can be released. Discharge tube at normal time and with increasing pressure When the fluid is discharged, the engaging portion of the elevating body and the engaged portion of the discharge tube are engaged, thereby securely restraining the discharge tube, and further raising the discharge tube to a predetermined temperature. For example, the temperature detecting means senses, and the on-off valve receives the signal from the temperature detecting means and opens the valve body. Then, the fluid in the discharge pipe is introduced into the elevating body through the connection pipe, and by the pressure of the introduced fluid, the elevating body is pushed down into the opening of the casing, and the engaging part of the elevating body and the engaged part of the discharge pipe are brought into contact with each other. Is disengaged. This allows the discharge tube to move freely without being restrained by the support device, thereby preventing the occurrence of thermal stress in the discharge tube.

That is, as shown in FIGS. 1 to 3, the support device 1 according to the first embodiment of the present invention has a mounting plate 3 provided on an upper surface of a gantry 2 and a central portion of the mounting plate 3. Is formed with an opening 3a. A box-shaped casing 4 having an opening 4a on its upper surface side is fitted into the opening hole 3a, and the end face 4b of the casing 4 on the opening 4a side is
It is provided on the same plane as the mounting plate 3.

Further, in the mating surface of the mounting plate 3 and the casing 4, a plurality of long holes 3b formed in the mounting plate 3 and a plurality of flanges 4c formed along the outer periphery of the casing 4 respectively. The long holes 4d are disposed so as to correspond to each other, and the long diameter side of each of the long holes 3b, 4d is disposed in accordance with the tube axis direction of the tube. A bolt / nut (an example of a connecting tool) 5 is inserted into each of the elongated holes 3b and 4d, and both the mounting plate 3 and the casing 4 are connected by the bolt / nut 5.

A rectangular cylinder block (an example of an elevating member) 7 is inserted into the opening 4a of the casing 4 via a coil spring (an example of an urging member) 6. The upper surface of the cylinder block 7 is It is configured to be pushed up from the casing 4 by the urging force of the coil spring 6. A pair of holes 7a and 7b are formed on the upper surface side of the cylinder block 7 in the insertion direction of the cylinder block 7.

On the other hand, a rectangular plate 9 protrudes from the surface of the discharge tube (an example of a tube) 8 along the tube axis direction. 9a is formed. A projecting portion (an example of an engaging portion) 7c of the cylinder block 7 from the casing 4 is engaged with the concave portion 9a by the urging force of the coil spring 6.

A temperature sensor (an example of a temperature detecting means) 10 for detecting a predetermined temperature is provided on the surface of the discharge pipe 8, and a connection pipe 11 for connecting the inside of the discharge pipe 8 and the inside of the cylinder block 7 is provided. Is provided. That is, one end of the connection pipe 11 is connected to the discharge pipe 8 and the connection pipe 11
Is branched in two directions via a pipe joint (not shown), one of which is communicated with the hole 7a of the cylinder block 7 and the other is communicated with the hole 7b of the cylinder block 7, respectively. Further, the connection pipe 11 is supported by a support fitting 12 provided on the upper surface of the mounting plate body 3, and each of the holes 7a and 7b of the cylinder block 7 has a tip end of each of the connection pipes 11 inserted into each of the holes 7a and 7b. It is configured to be slidable with respect to the portion 11a. An on-off valve 13 is provided in the middle of the connection pipe 11, and this on-off valve 13 opens and closes according to a signal from the temperature sensor 10, and is provided in each of the holes 7 a and 7 b of the cylinder block 7.
The fluid in the discharge tube 8 can be introduced.

The pressure of the introduced fluid pushes the cylinder block 7 down into the opening 4a of the casing 4 so that the engagement between the projection 7c of the cylinder block 7 and the recess 9a of the plate 9 can be released. It is composed.

The operation of the first embodiment will be described below. Normally, the projecting portion 7c of the cylinder block 7 and the concave portion 9a of the plate 9 are
The support device 1 reliably restrains the discharge tube 8 by being engaged by the urging force.

On the other hand, when the pressure of the fluid in the pipe exceeds a set value, a safety valve (not shown) operates to discharge the fluid from the discharge pipe 8. During this release, a large force acts on the pipe, for example, in the axial direction.
The discharge tube 8 is securely supported by the engagement of the coil spring 6 with the recess 9 a of the plate 9.

When the temperature of the fluid discharged from the discharge pipe 8 is high or when the temperature of the discharge pipe 8 is high, the temperature sensor 10 detects the temperature and the on-off valve 13 detects the temperature of the temperature sensor 1.
Upon receiving a signal from 0, a valve element (not shown) is opened. Then, the fluid in the discharge pipe 8 is introduced into each of the holes 7a, 7b of the cylinder block 7 through the connection pipe 11, and the pressure of the introduced fluid causes the cylinder block 7 to move the casing 4
Of the cylinder block 7
The engagement between the projection 7c and the recess 9a of the plate 9 is released. As a result, the discharge pipe 8 and the plate 9 are attached to the mounting plate 3.
On the upper surface of the discharge tube 8 without being restrained by the support device 1, thereby preventing generation of thermal stress in the discharge tube 8.

When the discharge of the fluid from the discharge tube 8 is completed and the temperature of the discharge tube 8 decreases, the temperature sensor 10 senses.
Next, the on-off valve 13 receives the signal from the temperature sensor 10 and closes the valve body, and the discharge pipe 8 and the plate body 9 return to their original positions. In this state, the projecting portion 7c of the cylinder block 7 and the concave portion 9a of the plate 9 are engaged by the urging force of the coil spring 6. However, since the return position of the discharge tube 8 and the plate body 9 may be inaccurate, in such a case,
By adjusting the position of the mounting plate 3 and the casing 4 with respect to each other in the tube axis direction of the discharge pipe 8 by using the elongated holes 3b and 4d formed on the mating surface of the mounting plate 3 and the casing 4, respectively, The protrusion 7c of the block 7 and the recess 9a of the plate 9 can be engaged.

As described above, the projection 7c of the cylinder block 7 and the recess 9a of the plate 9 are engaged with each other by the urging force of the coil spring 6 in the normal state and when the fluid is discharged from the discharge pipe 8 due to the pressure rise. By doing so, the discharge tube 8 can be reliably restrained.

Further, when a fluid is discharged from the discharge pipe 8 and the discharge pipe 8 rises to a predetermined temperature, the temperature sensor 10
The on-off valve 13 receives a signal from the temperature sensor 10 and the cylinder block 7 moves the opening 4 of the casing 4
It is pushed down into a. Thereby, the cylinder block 7
The engagement between the projection 7c and the recess 9a of the plate 9 is released, so that the discharge tube 8 moves freely without being restrained by the support device 1, and thermal stress is generated in the discharge tube 8. Can be prevented.

That is, the supporting device 1 inserts the cylinder block 7 into the opening 4 a of the casing 4 via the coil spring 6, and inserts the cylinder block 7 into the coil spring 6.
Can be moved up and down by the urging force and the high-temperature fluid pressure that can be introduced into the cylinder block 7 so that the recess 9a of the plate 9 connected to the discharge pipe 8 and the projection 7c of the cylinder block 7 can be disengaged. This eliminates the need for complicated mechanisms such as a conventional mechanical vibration isolator and a ball screw mechanism such as a hydraulic vibration isolator, a clutch mechanism, and a damper mechanism using hydraulic oil. Vibration isolator,
The cost can be reduced and the size can be reduced as compared with a hydraulic vibration isolator.

Next, a tube supporting device according to a second embodiment of the present invention will be described with reference to the drawings. First, FIGS. 1-3
The same reference numerals are given to members that perform the same operations as those described above, and description thereof is omitted. In the support device according to the first embodiment described above, the pressure source introduced from the connection pipe into the cylinder block is a fluid in the discharge pipe. On the other hand, the support device according to the second embodiment is The source is a pressing means such as a gas cylinder separate from the discharge tube.

That is, as shown in FIG. 4, the supporting device according to the second embodiment is provided with a gas cylinder 20 filled with compressed air (or nitrogen gas) or the like separately from the discharge pipe 8. A connection pipe 21 that connects the inside of the gas cylinder 20 and the inside of the cylinder block 7 is provided. That is, one end of the connection pipe 21 is connected to the gas cylinder 20 via the on-off valve 13, and the other end of the connection pipe 21 is
It branches in two directions via a pipe joint (not shown), one of which is communicated with the hole 7a of the cylinder block 7 and the other with the hole 7b of the cylinder block 7, respectively. Further, the connection pipe 21 is provided on the support fitting 1 provided on the upper surface of the mounting plate 3.
2 and each hole 7a,
7b is configured to be slidable with respect to the distal end 21a of each connection pipe 21 inserted into each of the holes 7a, 7b. The on-off valve 13 is opened and closed by a signal from the temperature sensor 10 so that compressed air in the gas cylinder 20 can be introduced into each of the holes 7a, 7b of the cylinder block 7.

By the pressure of the introduced air, the cylinder block 7 is pushed down into the opening 4a of the casing 4 so that the engagement between the projection 7c of the cylinder block 7 and the recess 9a of the plate 9 can be released. It is composed. The operation and effect are the same as those of the first embodiment.

In the second embodiment, the gas cylinder 20 is applied as an example of the pressing means. However, a pipe other than the discharge pipe 8 is applied as the pressing means, and the pressure of the fluid flowing through the pipe causes the cylinder block to operate. 7 may be pushed down into the opening 4 a of the casing 4.

In the second embodiment, the compressed air in the gas cylinder 20 is introduced into each of the holes 7a, 7b of the cylinder block 7, and the pressure of the introduced air causes the cylinder block 7 to open the casing 4. Although the actuator is pushed down into the portion 4a, an actuator for pushing the cylinder block 7 directly into the opening 4a of the casing 4 may be provided.

In each of the above embodiments, the temperature sensor 10 is provided on the surface of the discharge tube 8.
May be provided so as to protrude into the discharge tube 8. In each of the above embodiments, the support device is applied to the discharge pipe 8, but the support device can be applied to pipes other than the discharge pipe.

In each of the above embodiments, the mounting plate 3
Although the elongated hole is formed in both the casing and the casing 4, the elongated hole may be formed in only one of the mounting plate and the casing in accordance with the amount of displacement of the return of the discharge tube 8.

In the above embodiments, the recess 9a is provided on the plate 9 side connected to the discharge pipe 8, and the projection 7c engaging with the recess 9a is provided on the cylinder block 7 side. Alternatively, a protrusion may be provided on the side, and a concave portion engaging with the protrusion may be provided on the cylinder block 7 side.

[0036]

As described above, according to the present invention, at the time of normal operation and at the time of discharging the fluid from the tube due to the increase in pressure, the engaging portion of the elevating body and the engaged portion of the tube are disengaged. Is engaged by the urging force of the urging member, the pipe body can be reliably restrained, and further, the fluid is released from the pipe body, and if this pipe body rises to a predetermined temperature, the temperature detecting means senses, When the pressing means or the on-off valve receives the signal from the temperature detecting means and introduces the fluid into the elevating body, the elevating body is pushed down into the opening of the casing. Thus, the tube can be reliably restrained or freely moved as needed.

In this supporting device, an elevating body is inserted into the casing via an urging member, and the elevating body is raised and lowered by the urging force of the urging member and a high-temperature fluid pressure that can be introduced into the elevating body. By moving it, the engaged portion of the tube and the engaging portion of the elevating body can be disengaged, so that the conventional complicated mechanism is not required. The cost can be reduced and the size can be reduced as compared with a vibration isolator.

[Brief description of the drawings]

FIG. 1 is a cutaway front view of a main part of a tube support device according to a first embodiment of the present invention.

FIG. 2 is a cutaway side view of a main part of the support device.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a cutaway front view of a main part of a tube support device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support device 2 Stand 3 Mounting plate 3b Slot 4 Casing 4d Slot 5 Bolt / Nut 6 Coil spring 7 Cylinder block 7a Hole 7b Hole 7c Projection 8 Release pipe 9a Depression 10 Temperature sensor 11 Connection pipe 13 Opening / closing valve 20 Gas cylinder

Claims (3)

[Claims] A casing having an opening formed on an upper surface thereof is provided on a gantry side, and an elevating body is inserted into the opening of the casing via an urging member, and an engaging portion is provided on an upper surface side of the elevating body. And an engaged portion to be engaged with the engaging portion by the urging force of the urging member is provided on the surface of the tubular body, and the tubular body is provided with temperature detecting means, and a signal from the temperature detecting means is provided. Receiving means for receiving and pushing down the elevating body into the opening of the casing, and by depressing the elevating body, the engagement state between the engaging portion and the engaged portion can be released. Tube supporting device. 2. A casing having an opening formed on an upper surface thereof is provided on a gantry side, a lifting member is inserted into the opening of the casing via a biasing member, and an engaging portion is provided on an upper surface side of the lifting member. And an engaged portion to be engaged with the engaging portion by the urging force of the urging member is provided on a surface of the tubular body, and the tubular body is provided with a temperature detecting means and the elevating body from the tubular body. A connection pipe communicating with the inside of the lifting pipe, and an on-off valve that can be opened and closed by a signal from the temperature detecting means is provided in the middle of the connection pipe to introduce a fluid into the elevating body. A supporting device for a tubular body, characterized in that the lifting / lowering body is pushed down into the opening of the casing by the pressure of (1) to release the engagement between the engaging portion and the engaged portion. 3. The pipe according to claim 1, wherein an elongated hole is formed in at least one of the gantry and the casing, and a connecting tool is inserted into the elongated hole to connect the gantry and the casing. Body support device.