JP3237586U - Expansion joints - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an expansion joint capable of suppressing an increase in the number of parts and a complicated structure. SOLUTION: A first pipe member 19 and a pipe member are arranged coaxially with each other so that a fluid flows through the insides 19A and 21A, and are arranged at intervals in a direction along a virtual line A1 representing the center of each. 21, the inner cylinder 23 attached to the first pipe member 19, the outer cylinder 24 attached to the pipe member 21, and the inner cylinder 23 and the outer cylinder 24 are connected to each other so as to be movable in the direction along the virtual line A1. The connecting mechanism 37 is provided between the inner cylinder 23 and the outer cylinder 24, and the inner cylinders 23 and the inner cylinders 24A and 24A and the outer cylinders 23 and the outer cylinder 24 are fluid-tightened. A telescopic joint 15 having a packing 26 and a packing 26 separated from each other was provided. [Selection diagram] Fig. 2

Description

The present disclosure relates to an expansion joint that connects a first pipe member and a second pipe member that transports a fluid, and allows the first pipe member and the second pipe member to move with each other in the fluid transport direction. ..

An example of an expansion joint that connects a first pipe member and a second pipe member that transports a fluid and allows the first pipe member and the second pipe member to move with each other in the fluid transport direction is patented. It is described in Document 1. The spherical exhaust pipe joint, which is a telescopic joint described in Patent Document 1, is provided on the upstream side exhaust pipe connected to the engine side, the downstream side exhaust pipe connected to the atmosphere side, and the upstream side exhaust pipe. A convex spherical body, an outer case attached to the downstream exhaust pipe and surrounding the outside of the upstream exhaust pipe and the convex spherical body, an annular seal body provided between the outer case and the convex spherical body, and an outer case. An annular sliding body provided between the and a convex spherical body, a first compression coil spring provided in the outer case to push the seal body, and a second compression coil provided in the outer case to push the sliding body. With a spring.

In the spherical exhaust pipe joint described in Patent Document 1, the exhaust gas of the engine flows from the inside of the upstream exhaust pipe to the inside of the downstream exhaust pipe. The seal body pushed by the first compression coil spring is in contact with the outer surface of the convex spherical body, and the sliding body pushed by the second compression coil spring is in contact with the outer surface of the convex spherical body. The upstream exhaust pipe and the downstream exhaust pipe can move in the axial direction centered on each other, and the first compression coil spring and the second compression coil spring expand and contract to expand and contract the convex spherical body, the seal body, and the sliding body. It is possible to prevent the exhaust gas from leaking to the outside of the upstream exhaust pipe and the downstream exhaust pipe from between the moving body and the moving body.

Japanese Unexamined Patent Publication No. 2014-62610

In the expansion joint described in Patent Document 1, the inventor of the present application increases the number of parts so that the outer case can withstand the reaction force when the first compression coil spring and the second compression coil spring expand and contract. Recognized the challenge of having to complicate the structure.

An object of the present disclosure is to provide an expansion joint capable of suppressing an increase in the number of parts and a complicated structure.

The expansion joints of the present disclosure are arranged coaxially so that fluid flows inside, and are arranged at intervals along a virtual line representing the center of each of the first pipe member and the second pipe member. And the first auxiliary pipe attached to the first pipe member, the second auxiliary pipe attached to the second pipe member, and the first auxiliary pipe and the second auxiliary pipe to the virtual line. A connecting mechanism that is movably connected to each other in the direction along the line, a connecting mechanism provided between the first auxiliary pipe and the second auxiliary pipe, and the inside of the first auxiliary pipe and the second auxiliary pipe. It has a sealing device that fluidly separates the first auxiliary pipe and the outside of the second auxiliary pipe.

According to the expansion joint of the present disclosure, it is possible to suppress an increase in the number of parts and a complicated structure.

It is a schematic plan view which shows the power generation apparatus which has an expansion joint. (A) and (B) are plan sectional views of expansion joints.

The expansion joint (smooth joint, no reaction force joint) of the present disclosure connects a first pipe member and a second pipe member that transport exhaust gas. Hereinafter, the expansion joint of the present disclosure will be described with reference to the drawings. FIG. 1 is a schematic plan view showing a power generation device 10. The power generation device 10 includes a diesel engine 11, an emergency generator 12, a primary silencer 13, a secondary silencer 14, and an expansion joint 15. The diesel engine 11 includes an engine body 16, a combustion chamber provided in the engine body 16, an intake pipe 17 and an exhaust pipe 16A connected to the combustion chamber, a piston arranged facing the combustion chamber, and a piston. It has a crank shaft 16B connected via a connecting rod. Fuel is injected into the intake pipe 17 to generate an air-fuel mixture, and when the air-fuel mixture is supplied to the combustion chamber and burned, the piston operates and the crankshaft 16B rotates. The exhaust gas generated in the combustion chamber is discharged to the exhaust pipe 16A. The emergency generator 12 has a rotor and a stator, and the rotor is connected to the crankshaft 16B. The emergency generator 12 converts the rotational force of the crankshaft 16B into electric power, and the electric power is supplied to the storage battery or the electric load.

The primary silencer 13 and the secondary silencer 14 are each provided with a sound insulating plate, glass wool, steel wool, or the like inside. The primary silencer 13 and the secondary silencer 14 reduce the noise of the exhaust gas discharged from the exhaust pipe 16A of the diesel engine 11. The pipe member 18 and the pipe member 19 are connected to the primary silencer 13, and the pipe member 18 is connected to the exhaust pipe 16A of the diesel engine 11. An annular flange 20 is provided at the end in the direction along the virtual line A1 representing the center of the pipe member 19. A pipe member 21 is connected to the secondary silencer 14. An annular flange 22 is provided at the end of the pipe member 21. As shown in FIGS. 2A and 2B, the pipe member 19 and the pipe member 21 are arranged coaxially with the virtual line A1 as the center, and the pipe member 19 and the pipe member 21 are along the virtual line A1. They are arranged at intervals in the direction. In the exhaust gas flow direction B1, the pipe member 19 is arranged upstream of the pipe member 21.

The material of the pipe member 19 and the pipe member 21 is, for example, stainless steel or iron. The expansion joint 15 is a device for connecting the pipe member 19 and the pipe member 21. The expansion joint 15 has an inner cylinder 23, an outer cylinder 24, a holding plate 25, a packing 26, and a connecting bolt 27. The inner cylinder 23 and the outer cylinder 24 are arranged coaxially with the virtual line A1 as the center. The inner cylinder 23 is an element attached to the pipe member 19, and the material of the inner cylinder 23 is, for example, stainless steel or iron. The inside (space) 19A of the pipe member 19 and the inside (space) 23A of the inner cylinder 23 are connected. The inner diameter of the inner cylinder 23 is substantially the same as the inner diameter of the pipe member 19, and an annular flange 28 is provided at the end of the inner cylinder 23 in the direction along the virtual line A1. The flange 28 projects outward in the radial direction about the virtual line A1. The flange 28 is fixed to the flange 20. The flange 28 and the flange 20 may be fixed by welding or may be fixed by bolts. The outer diameter of the flange 28 is larger than the outer diameter of the flange 20.

The inner diameter of the outer cylinder 24 is larger than the outer diameter of the inner cylinder 23, and the outer cylinder 24 is arranged outside the inner cylinder 23 in the radial direction centered on the virtual line A1. The inside 23A of the inner cylinder 23 and the inside (space) 24A of the outer cylinder 24 are connected. The inner 24A of the outer cylinder 24 is connected to the inner 21A of the pipe member 21. An annular flange 29 is provided at the end of the outer cylinder 24 in the direction along the virtual line A1. The flange 29 projects outward in the radial direction centered on the virtual line A1. The flange 29 is fixed to the flange 22. The flange 29 and the flange 22 may be fixed by welding or may be fixed by bolts. The outer diameter of the flange 29 is larger than the outer diameter of the flange 22. The connecting mechanism 37 is composed of the connecting bolts 27 and the flanges 28 and 29. A part of the outer cylinder 24 and a part of the inner cylinder 23 are arranged so as to overlap each other in the direction along the virtual line A1.

The presser plate 25 is an annular body centered on the virtual line A1, and the inner diameter of the presser plate 25 is larger than the outer diameter of the inner cylinder 23 and smaller than the inner diameter of the outer cylinder 24. The presser plate 25 is made of stainless steel or iron as an example, and the presser plate 25 is fixed to the end portion of the outer cylinder 24 in the direction along the virtual line A1. The presser plate 25 is fixed to the outer cylinder 24 at the end opposite to the portion where the flange 29 is provided. The presser plate 25 is located outside the inner cylinder 23 in the radial direction centered on the virtual line A1. An annular snap ring 30 is attached to the inner peripheral surface of the outer cylinder 24.

The packing 26 is arranged between the inner peripheral surface of the outer cylinder 24 and the outer peripheral surface of the inner cylinder 23, and is arranged between the holding plate 25 and the snap ring 30 in the direction along the virtual line A1. ing. The packing 26 is made of ceramic wool (ceramic fiber) as an example, and the packing 26 is excellent in heat resistance and wear resistance. The heat resistant temperature of the packing 26 is approximately 1,000 ° C. The packing 26 is a wire rod having a quadrangular or circular cross-sectional shape. That is, the ceramic wire is spirally wound around the outer peripheral surface of the inner cylinder 23 to form the packing 26. The packing 26 is a sealing device that airtightly separates the inner 24A of the outer cylinder 24 from the outer 38 of the inner cylinder 23 and the outer cylinder 24. The packing 26 may be a yarn packing made of glass fiber.

A mounting hole 31 is provided so as to penetrate the flange 28 in the direction along the virtual line A1. A plurality of mounting holes 31 are arranged on the same circumference centered on the virtual line A1. A mounting hole 32 is provided which penetrates the flange 29 in the direction along the virtual line A1. A plurality of mounting holes 32 are arranged on the same circumference centered on the virtual line A1. One connecting bolt 27 is inserted with the mounting holes 31 and 32 as a set, and a plurality of connecting bolts 27 are provided.

Nuts 33, 34, 35, and 36 are attached to each of the connecting bolts 27, respectively. The nuts 33 and 34 are tightened, and the flange 29 is sandwiched between the nut 33 and the nut 34. That is, the connecting bolt 27 is fixed to the flange 29 so as not to move in the direction along the virtual line A1. The nuts 35 and 36 are tightened so as to press against each other. The nuts 35 and 36 are so-called locknuts arranged so as not to move in the direction along the virtual line A1 with respect to the connecting bolt 27. The nut 36 is arranged between the nut 35 and the flange 28 in the direction along the virtual line A1. The inner cylinder 23 can move within a predetermined range in the direction along the virtual line A1 with the connecting bolt 27 inserted in the mounting hole 31. The predetermined range is the range from the position where the flange 28 contacts the nut 36 to the position where the flange 28 contacts the presser plate 25.

The exhaust gas discharged from the exhaust pipe 16A of the diesel engine 11 flows into the inside 23A of the inner cylinder 23 shown in FIG. 2A through the pipe member 18, the primary silencer 13, and the inside 19A of the pipe member 19, and further. , It flows into the inside 21A of the pipe member 21 through the inside 24A of the outer cylinder 24. In this way, the exhaust gas flows along the flow direction B1. The flow direction B1 is parallel to the virtual line A1. The temperature of the exhaust gas is high, for example, about 600 ° C., and the pipe member through which the exhaust gas flows thermally expands. For example, the pipe member 19 thermally expands in the direction along the virtual line A1. Then, as shown in FIG. 2A, when the pipe member 19 expands in the direction along the virtual line A1 in a direction approaching the pipe member 21 in a state where the flange 28 and the nut 36 are in contact with each other, FIG. As shown in (B), the inner cylinder 23 moves along the virtual line A1 in a direction approaching the pipe member 21 together with the pipe member 19. In this way, the flange 28 is separated from the nut 36.

Further, when the inner cylinder 23 contracts in the direction along the virtual line A1 due to the decrease in temperature, the flange 28 comes into contact with the nut 36 and the inner cylinder 23 stops, as shown in FIG. 2A. When the outer cylinder 24 thermally expands or contracts in the direction along the virtual line A1 due to a temperature change, the holding plate 25 can approach or separate from the flange 28. The expansion joint 15 is not provided with an element that receives a reaction force in the direction along the virtual line A1 when the inner cylinder 23 and the outer cylinder 24 move relatively in the direction along the virtual line A1. For example, when the pipe member 19 contracts in the direction along the virtual line A1, an element that receives the reaction force of the elastic member such as a spring is not provided. Therefore, it is possible to suppress an increase in the number of parts of the expansion joint 15 and a complicated structure. It also functions without burdening equipment and facilities. Further, the expansion joint 15 can be manufactured compactly and inexpensively.

Further, either when the inner cylinder 23 and the outer cylinder 24 are stopped in the direction along the virtual line A1, or when the inner cylinder 23 and the outer cylinder 24 move relatively in the direction along the virtual line A1. Also, the inner 24A of the outer cylinder 24 and the outer 38 are hermetically sealed by the packing 26. Therefore, the exhaust gas does not leak from the inside 24A of the outer cylinder 24 to the outside 38. When the inner cylinder 23 and the outer cylinder 24 move relatively in the direction along the virtual line A1, the packing 26 and the outer peripheral surface of the inner cylinder 23 only rub against each other, and the opposite in the direction along the virtual line A1. No element that receives force is required.

An example of the technical meaning of the matters described in this embodiment is as follows. The expansion joint 15 is an example of an expansion joint. The virtual line A1 is an example of a virtual line. The interiors 19A, 21A, and 24A are examples of the interior. The pipe member 19 is an example of the first pipe member. The pipe member 21 is an example of the second pipe member. The inner cylinder 23 is an example of the first auxiliary pipe. The outer cylinder 24 is an example of the second auxiliary pipe. The connecting mechanism 37 is an example of the connecting mechanism. The packing 26 is an example of a sealing device. The flange 28 is an example of the first flange. The flange 29 is an example of the second flange. The connecting bolt 27 is an example of a connecting bolt. The external 38 is an example of the external.

The present embodiment is not limited to those disclosed using the drawings, and can be variously modified without departing from the gist thereof. For example, the engine connected to the emergency generator 12 may be a gas turbine instead of the diesel engine. Further, the generator connected to the engine may be a regular generator instead of the emergency generator. Further, the expansion joint may be provided in the exhaust system of the exhaust gas of the boiler, or may be provided in the general pipe. Further, the first pipe member, the second pipe member, the first auxiliary pipe and the second auxiliary pipe constituting the expansion joint have a circular, square or elliptical cross-sectional shape in a plane perpendicular to the flow direction of the fluid. And so on. Furthermore, the fluid flowing inside the first pipe member, the second pipe member, the first auxiliary pipe, and the second auxiliary pipe may be either gas or liquid.

The present disclosure can be used as an expansion joint that connects a first pipe member and a second pipe member that transports a fluid, and allows the first pipe member and the second pipe member to move with each other in the fluid transport direction. be.

15 ... Expansion joint, 19 ... Pipe member, 19A, 21A, 24A ... Internal, 21 ... Pipe member, 23 ... Inner cylinder, 24 ... Outer cylinder, 26 ... Packing, 27 ... Connecting bolt, 28 ... Flange, 29 ... Flange, 37 ... Connection mechanism, 38 ... External, A1 ... Virtual line

Claims (3)

The first pipe member and the second pipe member which are arranged coaxially so that the fluid flows inside and are arranged at intervals in the direction along the virtual line representing the center of each.
The first auxiliary pipe attached to the first pipe member and
Attached to the second pipe member, and with the second auxiliary pipe,
A connecting mechanism for connecting the first auxiliary pipe and the second auxiliary pipe so as to be movable in the direction along the virtual line.
The inside of the first auxiliary pipe and the second auxiliary pipe, and the outside of the first auxiliary pipe and the second auxiliary pipe are provided between the first auxiliary pipe and the second auxiliary pipe. A sealing device that separates fluids tightly,
Has an expansion joint. In the expansion joint according to claim 1,
The first pipe member is arranged upstream of the second pipe member in the flow direction of the fluid.
A part of the first auxiliary pipe is arranged inside the second auxiliary pipe.
The sealing device is an expansion joint arranged between the outer peripheral surface of the first auxiliary pipe and the inner peripheral surface of the second auxiliary pipe. In the expansion joint according to claim 2,
The connecting mechanism is
A first flange provided on the first auxiliary pipe and protruding outward in the radial direction centered on the virtual line, and a first flange.
A second flange provided on the second auxiliary pipe and protruding outward in the radial direction centered on the virtual line, and
A connecting bolt that connects the first auxiliary pipe and the second auxiliary pipe so as to be movable in the direction along the virtual line.
Has an expansion joint.

Images