JPH09280471A - In-pipe fluid heating/cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe inside fluid heating/cooling device requiring no heat exchanger, having a limited construction cost and equipment cost, and having a limited time and labor for maintenance. SOLUTION: A double pipe is formed by putting a sleeve 2 by spacing from the outer surface of a fluid transferring pipe 1, the inner surfaces on both ends of the sleeve 2 and the outer surfaces of the fluid transferring pipes 1 are blocked so as to be relatively moved, a heating medium or a cooling medium is allowed to through into a space between the fluid transferring pipes 1 and the sleeves 2 through a supplying port 9a and a discharging port 9b provided on the sleeves 2, and the temperature of fluid in the fluid transferring pipes 1 is raised or lowered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe fluid temperature cooling device for raising or lowering the temperature of a fluid flowing in a fluid transfer pipe.

[0002]

2. Description of the Related Art For example, regarding a gland seal steam of a steam turbine, a steam gland (sealing device) is provided at a portion where a rotor or a turbine shaft penetrates a turbine casing in order to prevent leakage of steam and leakage of air. Is provided. Normal,
The steam gland uses a labyrinth, which is a non-contact seal, but when the internal pressure is high, a pocket is provided in the middle of the labyrinth so that it communicates with an appropriate pressure inside the turbine body, and there is less loss due to leaked steam. I am trying to become. Air leaks from the outer pocket, so it is connected to the gland condenser. Since the pressure and amount of this gland steam change depending on the change in load, it may be necessary to raise or lower the temperature when returning it to the inside or returning to the gland condenser.

Although the above is an example of the gland steam, when it is necessary to raise or lower the temperature of the fluid flowing in this way, a heat exchanger such as a heater or a cooler is conventionally installed in a pipe system. Was installed in.

[0004]

As described above, conventionally,
As a means for raising or lowering the temperature of the fluid flowing in the pipe, a heat exchanger was installed in the pipe system, but a heat exchanger such as a heater or a cooler is required and it becomes expensive, Since it will be installed at a high cost, the construction cost will be high, and the pipe system will be complicated, so maintenance and maintenance will be required.

The present invention has been made in order to solve the above-mentioned problems. A pipe fluid temperature cooling device is provided which does not require a heat exchanger or the like, requires a small amount of equipment and construction cost, and requires less maintenance and maintenance. The purpose is to

[0006]

In a pipe fluid temperature cooling / cooling device according to the present invention, a space is provided between the fluid transfer pipe and the outer surface of the fluid transfer pipe to cover a sleeve to form a double pipe. A warm medium or a refrigerant body is circulated in a space between the fluid transfer pipe and the sleeve through a supply port and a discharge port provided in the sleeve so as to relatively block the outer surface of the fluid transfer pipe. Thus, the temperature of the fluid in the fluid transfer pipe is raised or lowered.

In the pipe fluid temperature cooling / cooling device according to the present invention, the heating medium or the cooling medium is injected from the supply port provided in the sleeve, and the heating medium or the cooling medium is circulated in the space between the fluid transfer pipe and the sleeve. When discharged from the discharge port, this warm medium or refrigerant body exchanges heat with the fluid in the fluid transfer pipe through the wall of the fluid transfer pipe, heating the fluid in the fluid transfer pipe to raise the temperature or cool it. To lower the temperature. Even if there is a change in the temperature difference between the fluid transfer pipe and the sleeve, relative movement is possible and there is no problem.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a pipe fluid temperature cooling device according to the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a fluid transfer tube, 2 is a sleeve (outer tube) provided outside the fluid transfer tube 1, 3 is a packing stopper, 4 is a packing box, 5 is packing, 6 is a lantern ring, and 7 is packing. A presser foot, 8 is a push-in bolt, and 9 is a supply port or a discharge port. The fluid transfer pipe 1 is, for example, a gland steam pipe arranged so as to guide leaked steam from a steam gland (sealing device) in a steam turbine or the like to a predetermined location or a gland condenser. The fluid such as gland steam passing through the fluid transfer pipe 1 may need to be slightly raised or lowered in temperature depending on, for example, operating conditions of the plant. In such a case, the pipe fluid temperature cooling / cooling device according to the present invention is provided at an appropriate position in the pipe of the fluid transfer pipe 1.

As shown in FIG. 1, a sleeve (tube) 2
Are formed so that a space is provided outside the outer peripheral surface of the fluid transfer pipe 1. Ring-shaped packing stoppers 3 having a quadrangular cross section are attached to the inner peripheral surfaces of both ends of the sleeve 2 by welding or the like. The inner peripheral surface of the packing stopper 3 is
The gap between the fluid transfer pipe 1 and the outer peripheral surface is finished to be as small as possible. Since there is relative expansion and contraction due to a change in temperature difference between the packing stopper 3 and the fluid transfer pipe 1, this gap cannot be made zero. Also, sleeve 2
The packing box 4 is attached to both ends of the airtightly by welding or the like. The inner peripheral surface of the packing box 4 and the outer peripheral surface of the fluid transfer pipe 1 facing the range from the packing retainer 7 to the packing stopper 3 are smoothly finished. A packing 5 and a lantern ring 6 are inserted between the outer peripheral surface of the fluid transfer pipe 1 and the inner peripheral surface of the packing box 4. The packing retainer 7 is formed so as to push in the packing 5 inserted between the fluid transfer pipe 1 and the packing box 4. The plurality of push-in bolts 8 are passed through a plurality of bolt holes formed in the flange of the outer end portion of the packing retainer 7 and screwed into the screw holes formed in the outer end surface of the packing box 4 so that the packing retainer 7 is pressed. Is formed so as to be pushed between the packing box 4 and the fluid transfer pipe 1. The sleeve 2 is provided with supply ports or discharge ports 9a and 9b, one of which is a supply port and the other of which is a discharge port. Note that 2f is a fin provided on the inner peripheral surface of the sleeve 2.

In order to assemble the in-pipe fluid temperature cooling device shown in FIG. 1, the packing boxes 4 and the fluid transfer pipe 1 on both ends of the sleeve 2 are assembled.
Insert the packing 5 and the lantern ring 6 between them, then push in each packing retainer 7, insert a plurality of push-in bolts 8 into the bolt holes of the flange of the packing retainer 7, and insert the push-in bolts 8 into the screw holes of the packing box 4. Screw in and push packing retainer 7 in the axial direction. The packing 5 pressed by the packing retainer 7 is received by the packing stopper 3 and pressed axially to be expanded in the radial direction, so that the packing 5 closely contacts the outer peripheral surface of the fluid transfer pipe 1 and the inner peripheral surfaces of both packing boxes 4. And seal. Due to the packing sealing structure at both ends of the sleeve 2, a sealed space for circulating the temperature or the refrigerant body formed between the inner peripheral surface of the packing box 4 and the outer peripheral surface of the fluid transfer pipe 1 is formed.

Next, the operation of the pipe fluid temperature cooling device shown in FIG. 1 will be described. A fluid such as ground vapor flows in the fluid transfer pipe 1. If 9a is a supply port and 9b is a discharge port, a fluid transfer pipe 1 and a sleeve 2 are supplied from a supply device (not shown) for supplying a warm medium or a coolant through the supply port 9a.
A warm medium or a cooling medium is injected into the space between and the discharge port 9b.
To be discharged. The warm medium or the refrigerant body flowing in the space between the fluid transfer tube 1 and the sleeve 2 exchanges heat with the fluid in the fluid transfer tube 1 through the tube wall of the fluid transfer tube 1, and the fluid in the fluid transfer tube 1 is heated. Or, it is cooled and the temperature rises or falls. As a result, the temperature of the fluid such as the ground steam in the fluid transfer pipe 1 can be raised or lowered according to, for example, the operating state of the plant. Even if there is a change in the temperature difference between the fluid transfer pipe 1 and the sleeve 2, the relative movement is possible and there is no problem.

The above-mentioned warm medium or coolant is the fluid transfer pipe 1
It is a fluid whose temperature is higher or lower than that of the fluid flowing therein, and any suitable one of steam, hot water, cooling water, tap water, oil, etc. may be used.

The fin 2f improves the heating or cooling efficiency by disturbing the flow of the warm medium or the cooling medium flowing between the fluid transfer pipe 1 and the sleeve 2. If it is not necessary, the fin 2f may not be provided. The fin 2f
If such a fin is provided on the outer peripheral surface of the fluid transfer pipe 1, the heat transfer area is increased and the heating or cooling efficiency is improved. Also,
The lantern ring 6 is used for discharging the leaking warm medium or the coolant or for injecting the lubricating liquid. The lantern ring 6 may be omitted if there is no such need.

In the pipe fluid temperature cooling / cooling device according to the present invention, the sleeve 2, the packing stopper 3, the packing box 4,
If the packing retainer 7 and the like are manufactured together with the fluid transfer pipe 1, there is no problem in the above-mentioned assembly, but after the fluid transfer pipe 1 is manufactured, the sleeve 2, packing stopper 3, packing box 4, packing retainer 7, etc. Even if it is attempted to be fitted on the outer surface 1, it may not be possible to fit it on the outer surface due to the flange of the fluid transfer pipe 1 or the like. In such a case, divide the sleeve 2, packing stopper 3, packing box 4, packing retainer 7 etc. horizontally by the center line and divide them into two parts. You can do this.

A sealing device including packing stoppers 3, packing boxes 4, packings 5, packing retainers 7, pressing bolts 8 and the like provided at both ends of the sleeve 2 may be replaced by, for example, a mechanical seal or a seal. It is also possible to use a sealing means such as an O-ring.

[0016]

As described above, according to the present invention, the sleeve is provided outside the fluid transfer pipe to seal both ends thereof,
By flowing a warm medium or a refrigerant body between the fluid transfer pipe and the sleeve to raise or lower the temperature of the fluid in the fluid transfer pipe, equipment such as a heat exchanger and its installation work are unnecessary, This has the effect of simplifying the pipe system and reducing the maintenance work.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a pipe fluid temperature cooling / cooling device according to the present invention.

[Explanation of symbols]

1: Fluid transfer pipe, 2: Sleeve, 3: Packing stop,
4: packing box, 5: packing, 7: packing retainer, 8: push-in bolt, 9: supply port or discharge port.

Claims (1)

[Claims] 1. A double tube by covering a space between the fluid transfer tube and the outer surface of the fluid transfer tube to form a double tube, and the inner surface of both ends of the sleeve and the outer surface of the fluid transfer tube are movably closed. Then, a heating medium or a cooling medium is circulated in a space between the fluid transfer pipe and the sleeve through a supply port and a discharge port provided in the sleeve to raise or lower the temperature of the fluid in the fluid transfer pipe. In-pipe fluid temperature cooling device.