JP2006275412A - Heat recovery device for cogeneration system and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat recovery device for a cogeneration system and its manufacturing method, not lowering productivity in inspecting the leakage of piping or the like. <P>SOLUTION: This heat recovery device 1 is provided with a tank 40 and a piping portion 30, and the piping portion 30 is unitized to be a piping unit 20. The piping unit 20 is manufactured in advance, and the leakage of piping portion 30 is inspected before assembling the whole. The whole is assembled after inspecting the leakage of the piping portion 30. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heat recovery apparatus for a cogeneration system and a method for manufacturing the same.

  Conventionally, a cogeneration system has been used. The cogeneration system generates power and generates heat by operating an engine, etc., and the electricity generated by the power generation is used for electrical appliances installed outside, and the heat generated by the heat generation is used for heating and hot water supply. It is done.

  And in such a cogeneration system, the storage part which can store the calorie | heat amount so that the necessary calorie | heat_amount used by a user can be stored beforehand and it can supply when needed is provided. This storage part is specifically a tank and stores heat as hot water in the tank.

In addition, when the amount of heat used by the user is large, it may not be possible to supply the necessary amount of heat only with the heat generated by the engine, etc. In such a case, an auxiliary heat source is used by using an auxiliary heat source. The heat generated by is supplied.
The heat is transferred from the engine or the auxiliary heat source to the tank or the heat using device installed outside by a heat medium such as hot water passing through the pipe.

  In such a cogeneration system, a power generation device having a power generation unit such as an engine and a device having a tank and an auxiliary heat source (heat recovery device) are manufactured separately, and the power generation device and the heat recovery device are connected at the installation location. Installed.

Such a cogeneration system is described in Patent Document 1 and the like.
JP 2004-125354 A

  As described above, since the heat recovery apparatus performs heat transfer using the heat medium in the pipe, the heat recovery apparatus has a complicated pipe path and a large number of pipes are used. The pipes and tanks are inspected for leaks to prevent problems such as leakage of heat medium during use.

  Inspecting for leaks in piping, etc. is performed at the manufacturing stage of the heat recovery device. If a leak is found in the piping or tank, check the location of the leak, correct it so that it does not leak, and check again for leaks. is doing.

  Confirmation of leakage of the piping or the like is performed in a state where the whole is assembled and the piping or the like is connected. Therefore, when a leak is found, it is necessary to disassemble the pipe to the extent that it can be repaired by removing the pipe and the like, and the productivity has deteriorated.

Such leakage is confirmed by pressurizing the pipe in a sealed state and leaving it for a certain period of time, and examining the degree of pressure drop. Therefore, when a portion having a large internal volume, such as a range including a tank, is sealed and confirmed, the degree of pressure decrease is small and the error tends to be large compared to a case where the internal volume is small.
Therefore, it is necessary to lengthen the pressurization time to check for leaks in a state where all the pipes and tanks are assembled, and productivity is lowered.

  Therefore, an object of the present invention is to provide a heat recovery device for a cogeneration system and a method for manufacturing the same without causing a decrease in productivity when checking for leaks in pipes and the like.

  And invention of Claim 1 for achieving an above-mentioned objective has a tank, a piping part, and a structure to which the said tank and a piping part are attached, and all or one part of a piping part is a tank. And the pipe section is unitized to form a pipe unit, which is a heat recovery apparatus for a cogeneration system.

  According to the first aspect of the present invention, all or a part of the piping connected to the tank is unitized to form a piping unit, so that it is possible to inspect piping leakage in the unit state. Become. And it can manufacture efficiently by using the piping unit in which the inspection of the leak was completed in the case of manufacture of a heat recovery apparatus.

  The invention according to claim 2 is characterized in that the piping unit is provided with a locking portion, and the piping unit is attached to the structure by hooking the locking portion of the piping unit. It is a heat recovery apparatus of the described cogeneration system.

  According to the second aspect of the present invention, the piping unit is provided with the locking portion, and the piping unit is attached by hooking the locking portion of the piping unit to the structure. Can be done easily.

  The invention according to claim 3 is the heat recovery apparatus for a cogeneration system according to claim 1 or 2, wherein the pipe connected to the tank has a portion that becomes a part of the circulation circuit. is there.

  According to the third aspect of the present invention, since the pipe part connected to the tank has a part that becomes a part of the circulation circuit, the circulation part is formed in a state before the pipe part is connected to the tank. It is easy to check for leaks.

  Invention of Claim 4 is a manufacturing method of the heat recovery apparatus of the cogeneration system which has a tank, a piping part, and the structure to which the said tank and piping part are attached, Comprising: A unit including a piping part is united Unit manufacturing process to manufacture the piping unit, piping leakage inspection process to check the leakage of the piping part, piping unit mounting process to install the piping unit to the structure, tank leakage inspection process to check the tank leakage, A cogeneration system comprising: a tank mounting process for mounting the tank to the structure; and a connecting process for connecting all or part of the tank and the piping section, wherein the pipe leakage inspection process is performed before the connecting process. A method of manufacturing a heat recovery device for a system.

  According to the invention described in claim 4, since the pipe leak inspection process for inspecting the leak of the pipe section is performed before the connecting process for connecting all or part of the tank and the pipe section, the inspection of the pipe leak is performed. Can be performed with high accuracy. In addition, it is preferable that the pipe leakage inspection process is performed on a separate line from the entire assembly, after the unit manufacturing process and before the piping unit mounting process, because production efficiency is improved.

  According to a fifth aspect of the present invention, the piping unit is provided with a locking portion, and the piping unit mounting step is performed by hooking the locking portion of the piping unit on the structure. A method for manufacturing a heat recovery device for a cogeneration system according to the description.

  According to the fifth aspect of the present invention, in the piping unit mounting step, since the engaging portion of the piping unit is hooked on the structure, the mounting operation is easy to perform.

  According to a sixth aspect of the present invention, there is provided the heat recovery apparatus for a cogeneration system according to the fourth or fifth aspect, wherein the pipe portion connected to the tank has a portion that becomes a part of the circulation circuit. It is a manufacturing method.

  According to the sixth aspect of the present invention, since the pipe portion connected to the tank has a portion that becomes a part of the circulation circuit, the circulation portion is formed in a state before the pipe portion is connected to the tank. It is easy to check for leaks in the pipe leak inspection process.

  According to the heat recovery apparatus of the cogeneration system of the present invention and the manufacturing method thereof, productivity is not lowered even when checking leakage of piping or the like.

  Hereinafter, specific examples of the present invention will be described. FIG. 1 is a perspective view of a cogeneration system using the heat recovery apparatus of the present invention. FIG. 2 is an operation principle diagram of the cogeneration system shown in FIG. FIG. 3 is a perspective view showing the structure and the attachment member of the piping unit. 4A is a front view showing the vicinity of the locking portion of the mounting member, FIG. 4B is a side view showing the vicinity of the locking portion of the mounting member, and FIG. 4C is the structure. It is the side view which showed the hole part vicinity. 5A and 5B are diagrams showing the piping unit, where FIG. 5A is a front view and FIG. 5B is a side view.

As shown in FIG. 1, the heat recovery apparatus 1 according to the first embodiment of the present invention is used together with a heating device 11 and used as a cogeneration system 10.
And heat_generation | fever and electric power generation are performed by operating the gas engine 11a of the heat generating apparatus 11. FIG. As shown in FIG. 2, the heat generated by the gas engine 11a can be moved to the heat recovery apparatus 1, and the generated electricity is used in an electric device.

As shown in FIG. 1, the heat recovery apparatus 1 includes a piping unit 20, a tank unit 21, an auxiliary heat source 22, and an exterior part 23. Further, as shown in FIG. 3, the heat recovery apparatus 1 has a structure 24. have.
The piping unit 20, the tank unit 21, and the auxiliary heat source 22 are attached to the structure 24, and the exterior portion 23 covers the piping unit 20, the tank unit 21, the auxiliary heat source 22, and the structure 24. Fixed to. The appearance of the heat recovery apparatus 1 is a vertically long rectangular parallelepiped.

As shown in FIG. 5, the piping unit 20 includes a piping part 30 and an attachment member 31. And the piping part 30 is comprised by piping, a heat exchanger, etc., and these members are complicated and become block shape. The piping unit 30 is provided with a partial circuit 32 a that is a part of the circulation circuit unit 32, an exhaust heat recovery unit 33, a bath circuit unit 35, a heating circuit unit 36, and a hot water supply / hot water supply unit 37. Partial piping is included.
These are connected in a state as shown in FIG. Among the piping part 30, the partial circuit 32 a and the hot water supply part 37 are connected to the tank 40.

  The piping part 30 is attached to the attachment member 31. The attachment member 31 is formed by bending a plate into an L shape, and has a bottom surface portion 31a and a back surface portion 31b. Both the bottom surface portion 31a and the back surface portion 31b are rectangular, the surface of the bottom surface portion 31a is in the horizontal direction, and the surface of the back surface portion 31b is a surface in the vertical direction. Further, the widths of the bottom surface portion 31a and the back surface portion 31b (from the upper left to the lower right in FIG. 3) are substantially the same.

Further, the attachment member 31 is provided with an engaging portion 38 that can be engaged with a hole 50 of the structure 24, which will be described later. Two engaging portions 38 are provided near the upper corner of the back surface portion 31b. The shape of the engaging portion 38 is a key shape and is provided with a notch 38a. The engaging portion 38 is engaged by being inserted into the hole 50, and the attachment member 31 is hooked on the structure 24. Can be suspended.
Further, the attachment member 31 is provided with a through hole 31c at a position where piping or the like passes.

The tank unit 21 includes a tank 40, pumps 41 and 42, and a partial circuit 32 b that is a part of the circulation circuit unit 32.
The auxiliary heat source 22 supplies heat when the supply of heat from the gas engine 11a side is insufficient, and a gas burner or the like is used.

As shown in FIG. 3, the structure 24 is a frame-like member, and the pipe unit 20 having the pipe part 30, the tank unit 21 having the tank 40, and the auxiliary heat source 22 can be attached thereto.
The structure 24 is formed by connecting rods and plates, and specifically, a rectangular bottom plate 52 and four vertical bars 53a, 53b, 53c, and 53d positioned above the bottom plate 52. And have.

The four vertical bars 53a, 53b, 53c, 53d have the same length and are arranged in parallel, and the shape surrounded by the vertical bars 53a, 53b, 53c, 53d is a rectangular parallelepiped. A piping unit 20 and an auxiliary heat source 22 described later are arranged in a space 53e surrounded by the vertical bars 53a, 53b, 53c, and 53d.
As the vertical bars 53a, 53b, 53c, and 53d, square pipes that are square cylindrical rods are used.

The vertical bar 53a and the vertical bar 53b are connected by a horizontal bar 55, the vertical bar 53b and the vertical bar 53c are connected by a horizontal bar 56, and the vertical bar 53c and the vertical bar 53d are connected by a horizontal bar 57. These horizontal bars 55, 56 and 57 are arranged near the upper ends of the four vertical bars 53a, 53b, 53c and 53d.
The vertical bar 53a and the vertical bar 53d are connected by horizontal bars 58 and 59. The horizontal bar 58 is disposed slightly below the middle between the vertical bars 53a and 53d, and the horizontal bar 59 is connected to the vertical bar 53a. , 53d.
The vertical bar 53a and the vertical bar 53b are connected by a horizontal bar 61 near the lower end, and the vertical bar 53c and the vertical bar 53d are connected by a horizontal bar 62 near the lower end. The horizontal bars 61 and 62 protrude to the vertical bar 53b and the vertical bar 53c side.

Further, the structure 24 is provided with a vertical plate 60 and a bottom plate 52. The vertical plate 60 is located between the vertical bars 53b and 53c and in the vicinity of the lower ends of the vertical bars 53b and 53c. The bottom plate 52 is fixed at the protruding portion of the horizontal bars 61 and 62.
The vertical bars 53a, 53b, 53c, 53d and the horizontal bars 55, 56, 57, 58, 59, 61, 62, the vertical plate 60, and the bottom plate 52 can be fixed by bolts or welding.

  The vertical bars 53b and 53c are provided with holes 50, respectively. As shown in FIGS. 3 and 4C, the hole 50 is a hole that penetrates one surface of the square tube, and has a size that allows the engagement portion 38 to be inserted.

As shown in FIG. 1, the tank unit 21 and the auxiliary heat source 22 are arranged so that the pipe unit 20 is positioned above and below the auxiliary heat source 22, and the auxiliary heat source 22 and the pipe unit 20. The tank unit 21 is arranged so as to be adjacent to each other.
Specifically, the tank unit 21 and the auxiliary heat source 22 are disposed in the space 53e, and the tank unit 21 is disposed on the bottom plate 52.
And the exterior part 23 is located in the outer side of the structure 24, and can cover the whole by fixing the exterior part 23 in the state to which the piping unit 20, the tank unit 21, and the auxiliary heat source 22 are attached. it can.

  When the pipe unit 20, the tank unit 21, and the auxiliary heat source 22 are attached to the structure 24, these pipes are connected so as to be in a state as shown in FIG. And the partial circuit 32a of the piping part 30 and the partial circuit 32b of the tank unit 21 are connected, it becomes cyclic | annular, and the circulation circuit part 32 which is a circuit to circulate is formed. Further, the exhaust heat recovery unit 33 forms a circulation circuit with the pipe 43 provided on the gas engine 11a side. Then, heat can be transferred and supplied.

Specifically, heat generated by operating the gas engine 11a of the heat generating device 11 is transferred to a heat medium flowing through a circulation circuit formed by the pipe 43 and the exhaust heat recovery unit 33, and further, the exhaust heat recovery unit Heat can be transferred to the circulation circuit unit 32 and the heating circuit unit 36 by the first heat exchanger 44 and the second heat exchanger 45 provided in 33.
Furthermore, water as a heat medium flows through the circulation circuit section 32, and this water is heated by the heat transfer. Note that the pumps 41 and 42 of the tank unit 21 are used for circulation of the circulation circuit unit 32.

The circulation circuit unit 32 is connected to the tank 40 and the water supply / hot water supply unit 37, and the circulation circuit unit 32 supplies heat as hot water to the tank 40 and the water supply / hot water supply unit 37. The circulation circuit unit 32 can transmit heat to the heating circuit unit 36 and the bath circuit unit 35 by the third heat exchanger 46 and the fourth heat exchanger 47.
And the heating circuit part 36 is connected to the heating appliance which can radiate heat, and the heat transferred by the second heat exchanger 45 or the third heat exchanger 46 can be radiated by the heating appliance. . In addition, the fourth heat exchanger 47 can supply heat to the bath.

  A method for manufacturing the heat recovery apparatus 1 will be described. First, the piping part 30 is attached to the attachment member 31, and the piping unit 20 is assembled (unit manufacturing process). The piping unit 20 is sized to enter the space 53e of the structure 24 and has a block shape. Then, the piping unit 20 is checked for leaks in the piping, and it is confirmed whether there is any leakage from the partial circuit 32a, the exhaust heat recovery unit 33, the bath circuit unit 35, the heating circuit unit 36, and the hot water supply / hot water supply unit 37 (pipe leakage). Inspection process). In this pipe leak check process, each pipe is pressurized in a sealed state, and after a predetermined time elapses, it is checked whether there is any pressure drop.

  Piping unit 20 is manufactured and piping leaks are checked on a separate line from the overall assembly described later. The piping unit 20 is completed and inspected for leaks. As a result, the entire assembly line can be shortened.

Next, the piping unit 20 is attached to the structure 24 (piping unit attaching step). The piping unit 20 is a product that has passed the piping leakage inspection process.
The piping unit 20 is attached by hooking the engaging portion 38 of the mounting member 31 of the piping unit 20 into the hole 50 of the structure 24. Therefore, the piping unit 20 can be easily attached to the structure 24, and workability is good.

  Further, the auxiliary heat source 22 is attached and fixed to the structure 24. As for the auxiliary heat source 22, as in the case of the piping unit 20, the auxiliary heat source 22 that has been assembled in another line and inspected is used. At this time, the auxiliary heat source 22 and the piping of the piping unit 20 are connected.

  After the auxiliary heat source 22 is attached, the tank unit 21 is attached to the structure 24 (tank connection step), and the piping of the piping unit 20 and the piping of the tank unit 21 are connected (connection step). Specifically, the partial circuit 32a of the piping unit 20 and the partial circuit 32b of the tank unit 21 are connected to form the circulation circuit unit 32, and the tank 40 and the water supply / hot water supply unit 37 are connected. Although not shown, the pumps 41 and 42 are located below the tank 40.

Then, when the piping of the tank unit 21 is connected, the connection of the piping is completed. In this state, the tank unit 21 and other parts that have not been checked for leaks are checked for leaks (tank leak check process).
Furthermore, the exterior part 23 is attached to the structure 24, and the heat recovery apparatus 1 is completed.

In the heat recovery apparatus 1 of the present embodiment, since most of the pipes used in the heat recovery apparatus 1 are unitized to form the pipe unit 20, the pipe of the pipe unit 20 is checked for leaks in advance. It can be carried out. In addition, it is possible to check for leaks in the piping (circulation circuit unit 32, water supply and hot water supply unit 37) connected to the tank 40 in a state before being connected to the tank 40, and to check efficiently. it can.
Moreover, since the piping unit 20 is block-shaped, heat radiation can be reduced as a whole, and thermal efficiency can be improved.

It is a perspective view of a cogeneration system using the heat recovery apparatus of the present invention. It is an operation | movement principle figure of the cogeneration system shown in FIG. It is the perspective view which showed the attachment member of the structure and the piping unit. (A) is a front view showing the vicinity of the locking portion of the mounting member, (b) is a side view showing the vicinity of the locking portion of the mounting member, and (c) is near the hole of the structure. It is the side view which showed. It is a figure which shows a piping unit, (a) is a front view, (b) is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat recovery apparatus 10 Cogeneration system 20 Piping unit 24 Structure 30 Piping part 31 Mounting member 32 Circulation circuit 32a Partial circuit 40 Tank

Claims (6)

  A tank, a piping unit, and a structure to which the tank and the piping unit are attached, and all or a part of the piping unit is connected to the tank, and the piping unit is unitized so that the piping unit is A heat recovery device for a cogeneration system characterized by being formed.   The heat recovery device for a cogeneration system according to claim 1, wherein the piping unit is provided with a locking portion, and the piping unit is attached to the structure by hooking the locking portion of the piping unit. .   The heat recovery apparatus for a cogeneration system according to claim 1 or 2, wherein the piping connected to the tank has a portion that becomes a part of a circulation circuit. A method of manufacturing a heat recovery device for a cogeneration system having a tank, a piping section, and a structure to which the tank and the piping section are attached,
A unit manufacturing process that manufactures piping units by unitizing members including the piping section, a piping leak inspection process that checks for leaks in the piping section, a piping unit installation process that attaches the piping unit to the structure, and tank leak inspection A tank leak check process, a tank mounting process for attaching the tank to the structure, and a connection process for connecting all or part of the tank and the pipe section, the pipe leak check process being performed before the connection process. A method of manufacturing a heat recovery device for a cogeneration system.   5. The heat recovery apparatus for a cogeneration system according to claim 4, wherein the piping unit is provided with a locking portion, and the piping unit mounting step is performed by hooking the locking portion of the piping unit to the structure. Manufacturing method.   6. The method of manufacturing a heat recovery apparatus for a cogeneration system according to claim 4, wherein the pipe connected to the tank has a portion that becomes a part of a circulation circuit.

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