JP2012180998A - Joint structure of absorption type chiller heater, and machining method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify initial setup when finish machining is performed to a seal member contact surface of a flange joint provided in an absorption type chiller heater, so that required finish machining will be completed in a short machining time, and minimal equipment and materials will be used for machining.SOLUTION: At a split part of respective split shells, a pair of flanges is formed. On a flange surface of one flange 16B (17B, 15B, 18B), a first seal groove 20 (26, 29, 32) is formed which has a rectangular cross-sectional shape, has a bottom surface with finish machining applied thereon, and allows a seal member 21 to be filled into the inside thereof. At a position corresponding thereto of the another flange 16A (17A, 15A, 18A), a shallow seal groove 22 is formed by finish machining.

Description

  The present invention relates to a joint structure of an absorption chiller / heater and a processing method thereof, and more particularly, to a flange joint structure provided at an end of each divided shell and a processing method of a flange surface.

  Conventionally, a large absorption chiller / heater that cannot be transported using an elevator does not need a large crane and can be operated easily and at low cost. In many cases, the block is divided into a plurality of blocks, each block is individually transported by an elevator, and is integrally assembled at the installation site.

  The applicant of the present application first forms a flange portion at the end of each shell as an assembly structure of each divided shell, and the flange surface of one flange portion (the other flange) of the two flange portions to be connected. A circular seal groove is formed on the abutment surface), a ring-shaped seal member is inserted into the seal groove, and the two flange portions are fastened by fastening means such as bolts and nuts via the seal member. A flange joint structure has been proposed (see, for example, Patent Documents 1, 2, and 3). Unlike the case where each block is assembled by welding, this structure has the advantage that there is no risk of fire and that no large-scale equipment or skilled technicians are required.

JP 2010-54132 A JP 2010-54133 A JP 2010-54134 A

  By the way, since the inside of the shell of the absorption chiller / heater needs to be kept in a vacuum state (a state in which no air exists), the flange joint needs to have a high sealing performance. The sealing effect at the flange joint is maintained by maintaining the state in which the seal member is pressed against the flange surface and the wall surface of the seal groove, and its performance is affected by the surface roughness of the surface against which the seal member is pressed. In order to give the joint high sealing performance, it is desirable to process the bottom surface of the seal groove against which the seal member is pressed and the flange surface of the other flange portion as smoothly as possible.

  However, since the circumferential length of the flange surface is as long as 3 to 4 meters or more, it is difficult to perform finishing to reduce the surface roughness in the first place. When finishing the entire flange surface of the part, since the processing area is large, a great processing cost is required. Further, if finishing is performed on the entire flange surface of the flange portion, equipment and processing preparation different from the case of finishing only the bottom surface of the seal groove is required, and thus the processing cost is also expensive. For this reason, in practice, it is difficult to sufficiently reduce the surface roughness of the surface against which the seal member is pressed, and it is difficult to obtain a flange joint structure having high sealing performance.

  The present invention has been made in view of such a state of the art, and an object of the present invention is to provide an absorption chiller / heater joint structure that is inexpensive and has high sealing performance, and a processing method thereof. It is in.

  The present invention has been made in view of the above-mentioned problems, and regarding the joint structure of the absorption chiller / heater, a regenerator, a condenser, an evaporator, an absorber, a heat exchanger, which are connected via a pipeline, A joint provided in an absorption chiller / heater equipped with a refrigerant pump and a solution pump and having a cooling capacity, a heating capacity or a hot water generation capacity by enclosing an absorption solution obtained by mixing a refrigerant and an absorbent in the vessel And having one or more shells constituting an outer casing of the regenerator, the condenser, the evaporator, and the absorber, and at least one of the one or more shells is a plurality of blocks. In the joint structure of the absorption chiller / heater that divides the divided portions of the divided shells, a flange portion formed at an end of the divided shell and two flange portions that are joined to each other One of them A first seal groove having a rectangular cross-sectional shape formed in a circular shape along the flange surface of the flange portion and having a bottom surface smoother than the flange surface of the one flange portion, and the flange surface of the other flange portion The second seal groove is shallower than the first seal groove, and the cross-sectional shape is the first and second cross-sectional shapes. The second seal groove has a bottom surface that is smoother than the flange surface of the other flange portion. Formed in a rectangular shape having a thickness dimension larger than the total depth of the seal grooves and a width dimension smaller than the width dimensions of the first and second seal grooves, and the front and back surfaces are the bottom surfaces of the first seal grooves, respectively. And a ring-shaped seal member that is in close contact with the bottom surface of the second seal groove, and a fastening means that tightens the two flange portions to bring the flange surfaces into close contact with each other.

  When the second seal groove shallower than the first seal groove is formed along the flange surface of the other flange portion and its bottom surface is finished to be smoother than the flange surface of the other flange portion, the flange of the other flange portion Compared with the case where finishing processing is performed on the entire surface, the processing area of finishing processing can be reduced and the processing time can be shortened, so that the processing cost can be reduced. In addition, since the processing machine, processing tool and numerical control program used for finishing the first seal groove can be used as they are for the processing of the second seal groove, the equipment to be used can be suppressed to the minimum, and the lowering of the second seal groove can be performed. Setup can be simplified. Therefore, an absorption chiller / heater with high sealing performance can be manufactured at low cost.

  In the joint structure of the absorption chiller / heater having the above-described configuration, the cross-sectional shape of the first seal groove is a rectangle having a width dimension larger than a depth dimension, and the seal member in an unloaded state The cross-sectional shape is a square or a rectangle whose width dimension is smaller than the width dimension of the seal groove.

  According to such a configuration, since the cross-sectional shape of the seal groove is a rectangle having a width dimension larger than the depth dimension, the processing depth of the seal groove can be reduced and the seal groove can be easily processed. Therefore, the cost of the absorption chiller / heater can be reduced.

  On the other hand, the present invention relates to a method for processing a joint of an absorption chiller / heater, and the present invention includes a regenerator, a condenser, an evaporator, an absorber, a heat exchanger, a refrigerant pump, and a solution pump connected via a pipe line, and A joint structure provided in an absorption chiller / heater that encloses an absorption solution obtained by mixing a refrigerant and an absorbent in a vessel and exhibits cooling capacity, heating capacity, or hot water generation capacity, the regenerator, It has one or a plurality of shells constituting an outer casing of the condenser, the evaporator and the absorber, and at least one of the one or more shells is divided into a plurality of blocks, and the divided shells In the joint method of an absorption chiller / heater for joining the divided parts, a flange part is formed at the end part of the divided shell and the flange of one of the two flange parts joined to each other surface Along the first seal groove having a rectangular cross-sectional shape, and then finishing the bottom surface of the first seal groove to finish the bottom surface smoother than the flange surface of the one flange portion. When the two flange portions are coupled to each other, a finishing process is applied to a portion of the flange surface of the other flange portion facing the first seal groove so that the bottom surface is smoother than the flange surface of the other flange portion. A finished shallow second sealing groove is formed.

  According to this configuration, after finishing the bottom surface of the first seal groove formed on the flange surface of one flange portion, the finishing process is performed on the portion facing the first seal groove on the flange surface of the other flange portion. Since the shallow second seal groove is formed, it is possible to finish the bottom surface of the first seal groove and the bottom surface of the second seal groove with the same equipment and the same setup, and an absorption chiller / heater with high sealing performance. It can be manufactured at low cost.

  The joint structure of the absorption chiller / heater and the processing method thereof according to the present invention include a first rectangular seal groove on the flange surface of one flange portion and a first flange surface of the other flange portion. Since the circumferentially shallow second seal groove corresponding to the seal groove is formed and the finishing process is performed only on the bottom surfaces of the first and second seal grooves, the finishing process time can be shortened and the finishing process can be performed. The processing machine, the processing tool, and the numerical control program to be used can be minimized, and an absorption chiller / heater with high sealing performance can be manufactured at low cost.

It is a partial cross section figure which shows the shell structure of the absorption-type cold / hot water machine which concerns on embodiment. It is a piping lineblock diagram of an absorption type cold / hot water machine concerning an embodiment. FIG. 3 is an end view taken along section line III-III in FIG. 1. It is an end view of the flange joint part of the shell which accommodated the low temperature regenerator and the condenser. It is an end view of the flange joint part of the shell which accommodated the high temperature regenerator. It is a figure which shows the state before the shell assembly of the flange joint structure applied to the absorption chiller / heater according to the embodiment. It is a figure which shows the state after the shell assembly of the flange joint structure applied to the absorption chiller / heater according to the embodiment. FIG. 4 is an enlarged end view taken along a cutting line VIII-VIII in FIG. 3. FIG. 4 is a sectional view taken along line IX-IX in FIG. 3.

  Hereinafter, an embodiment of an absorption chiller / heater according to the present invention will be described with reference to FIGS. 1 to 9, taking a two-stage absorption double-effect absorption chiller / heater as an example.

  First, based on FIG. 2, the structure of a two-stage absorption type dual effect absorption chiller / heater will be described. As is apparent from this figure, the two-stage absorption type dual effect absorption chiller / heater includes a high temperature regenerator 2 having a combustion chamber 1, a low temperature regenerator 3, a condenser 4, a first evaporator 5, and a first eliminator. 6, 1st absorber 7, 2nd evaporator 8, 2nd eliminator 9, 2nd absorber 10, refrigerant pump 11, solution pump 12, low temperature heat exchanger 13, high temperature heat exchanger 14, and each of these equipment 2 It is comprised from the pipe line which connects -14, The inside is hold | maintained under vacuum, and the absorption formed by mixing a refrigerant | coolant (for example, water) and an absorber (for example, lithium bromide) in the inside of the said container. The solution is enclosed.

  Next, the operation or function of each device will be described.

  The high-temperature regenerator 2 heats the absorption solution in the high-temperature regenerator 2 with the combustion heat of the combustion chamber 1 to generate refrigerant vapor, and generates an absorption solution having a low refrigerant content (hereinafter referred to as “concentrated absorption solution”). Generate.

  The low-temperature regenerator 3 has a heating tube group 3A, and the refrigerant solution from the high-temperature regenerator 2 flowing into the heating tube group 3A heats the absorption solution in the low-temperature regenerator 3 to generate refrigerant vapor. To produce a concentrated absorbent solution.

  The condenser 4 has a cooling water pipe group 4A, and the coolant vapor generated in the low-temperature regenerator 3 and flowing into the condenser 4 by the cooling water passing through the cooling water pipe group 4A is cooled and liquefied.

  The first evaporator 5 has a chilled water tube group 5A and a distribution header 5B. The refrigerant liquid liquefied by the condenser 4 is distributed from the distribution header 5B to the chilled water tube group 5A to evaporate the refrigerant liquid, and the chilled water tube group 5A. It cools by taking the latent heat of vaporization from the cold water (cooled medium) that passes through it.

  The first absorber 7 introduces the refrigerant vapor evaporated in the first evaporator 5 through the first eliminator 6, and the concentrated absorbent solution from the high temperature regenerator 2 and the low temperature regenerator 3 from the distribution header 7B to the cooling water tube group. The refrigerant vapor flowing into the first absorber 7 is absorbed by the concentrated absorbent solution, and an absorbent solution with an increased refrigerant content (hereinafter referred to as “intermediate concentration absorbent solution”) is generated.

  The second evaporator 8 distributes the refrigerant liquid passing through the first evaporator 5 from the distribution header 8B to the cold water pipe group 8A to evaporate the refrigerant liquid, and from the cold water (cooled medium) passing through the cold water pipe group 8A. Take away the latent heat of vaporization and cool.

  The second absorber 10 introduces the refrigerant vapor evaporated in the second evaporator 8 through the eliminator 9, and this refrigerant vapor is introduced from the first absorber 7 and distributed from the distribution header 10B to the cooling water pipe group 10A. The absorption solution having a higher refrigerant content (hereinafter referred to as “dilute absorption solution”) is generated by absorbing the intermediate concentration absorption solution.

  The refrigerant pump 11 sucks the refrigerant liquid in the bottom liquid reservoir 8C of the second evaporator 8 and distributes it from the spray header 5B to the cold water tube group 5A of the first evaporator 5.

  The solution pump 12 sucks the absorbing solution in the bottom reservoir 10C of the second absorber 10, distributes a part thereof from the spray header 7B to the cooling water pipe group 7A of the first absorber 7, and the rest as the low temperature regenerator 3 and Feed into the high temperature regenerator 2.

  The low-temperature heat exchanger 13 exchanges heat between the diluted absorbent solution (temperature is low) sent from the solution pump 12 and the concentrated absorbent solution (temperature is high) returning from the low-temperature regenerator 3 to the absorber 7. The high temperature heat exchanger 14 exchanges heat between the diluted absorbent solution (temperature is low) sent from the solution pump 12 and the concentrated absorbent solution (temperature is high) returning from the high temperature regenerator 2 to the absorber 7.

  As shown in FIG. 2, the low-temperature regenerator 3 and the condenser 4 are configured with a shell 15 as an exterior body, and the first evaporator 5 and the first absorber 7 are configured with a shell 16 as an exterior body. 8 and the second absorber 10 are configured with the shell 17 as an exterior body, and the high-temperature regenerator 2 is configured with the shell 18 as an exterior body.

  When the shells 15 to 18 cannot be transported as an integral unit by an elevator, as illustrated in FIG. 1, the shells 15 to 18 are divided into a plurality of blocks, and then the blocks are transported by the elevator and assembled integrally at the installation site. FIG. 1 shows a state in which the shell 16 and the shell 17 are divided into two in the length direction, and the divided portions of the shells 16 and 17 are integrated through a flange joint.

  As shown in FIGS. 1, 3, 6, and 7, the flange joint of the shell 16 includes a pair of flange portions 16A and 16B provided at a split portion of the shell 16, and one flange portion (example of FIG. 3). Then, the first seal groove 20 formed in a circular shape along the flange surface of the flange portion 16B), the ring-shaped seal member 21 fitted in the first seal groove 20, and the flange of the other flange portion 16A The second seal groove 22 is formed in a circular shape along the surface, and fastening means (not shown) such as bolts and nuts for fastening the flange portions 16A and 16B to be coupled together. The flange joint of the shell 17 is the same as this, and a pair of flange portions 17A and 17B provided at the split portion of the shell 17 and the flange surface of one flange portion (in the example of FIG. 3, the flange portion 17B). A first seal groove 20 formed in a circular shape along the ring, a ring-shaped seal member 21 fitted in the first seal groove 20, and a circular shape formed along the flange surface of the other flange portion 17A. The second seal groove 22 is constituted by fastening means (not shown) such as bolts and nuts that fasten the flange portions 17A and 17B and integrally couple them.

  The flange portions 16A and 16B are provided at the end portions of the divided portions of the shell 16, and are formed in a collar shape extending perpendicularly outward from each end portion. The flange portions 17A and 17B are provided at the end portions of the divided portions of the shell 17, and are formed in a collar shape extending perpendicularly outward from each end portion. Each of the flange portions 16A, 16B, 17A, 17B is provided with bolt through holes 19 at predetermined intervals at corresponding positions.

  The first seal groove 20 is formed in a circular shape along the flange surface of the flange portion 16B, and the front shape thereof is a quadrangle whose corners are rounded into an arc shape as shown in FIG. . Further, as shown in FIGS. 6 and 7, the cross-sectional shape of the seal groove 20 is formed in a rectangle in which the depth dimension h is smaller than the width dimension b. The bottom surface of the first seal groove 20 is subjected to a finishing process for making the surface roughness smaller than that of the flange surface of the flange portion 16B.

  The second seal groove 22 is formed in the same shape and the same size as the first seal groove 20 along the flange surface of the flange portion 16A. As shown in FIGS. 6 and 7, the cross-sectional shape of the second seal groove 20 is formed in a recessed groove shape that is much shallower than the first seal groove 20. The second seal groove 20 is formed by exposing the flange surface of the flange portion 16A with a tool for finishing, and the depth dimension is preferably 0.03 mm or more and 0.05 mm or less. This is because when finishing by cutting, if the depth of cut is less than 0.03 mm, the depth of the finished groove often does not become the desired depth, and if it exceeds 0.05 mm This is because the surface roughness of the finished groove is often increased and becomes coarse. The processing of the second seal groove 22 is performed using a tool used for finishing the bottom surface of the first seal groove 20 or a tool having the same specification as this, and numerical control data for controlling the movement trajectory of the tool is also included. The one for finishing the first seal groove 20 is utilized. Thereby, the process of the 2nd seal groove 22 can be made efficient, and the joint structure of the absorption-type cold / hot water machine which has low cost and high sealing performance can be obtained.

  The seal member 21 is formed in a ring shape with a material having rubber-like elasticity, such as silicone rubber. The cross-sectional shape is a square or rectangle in which the width dimension B is smaller than the width dimension b of the first seal groove 20 and the thickness dimension H is larger than the total depth of the first seal groove 20 and the second seal groove 22. It is formed. In addition, the circumferential length of the inner circumferential surface of the seal member 21 is the same as the circumferential length of the inner circumferential wall surface of the first seal groove 20 or the circumferential direction of the inner circumferential wall surface of the first seal groove 20. It is desirable to form it shorter in the range of 1% or less than the length. The reason is that when the seal member 21 is fitted in the first seal groove 20, the inner peripheral surface of the seal member 21 is brought into close contact with the inner peripheral side wall surface of the first seal groove 20, and the seal is sealed from the first seal groove 20. This is because the member 21 is difficult to drop off. In addition, since the length of the seal member 21 is limited, excessive tension does not act on the seal member 21, and the seal member 21 is less likely to drop out of the first seal groove 20 from this point. The cross-sectional area of the seal member 21 is set to be smaller than the total cross-sectional area of the first seal groove 20 and the second seal groove 22, and even when the flange portion is tightened as shown in FIG. A space exists between the outer peripheral surface of the member 21 and the outer peripheral side wall surface of the seal groove 20. Thereby, the difference in thermal expansion between the flange portions 16A, 16B, 17A, 17B and the seal member 21 can be absorbed.

  As shown in FIG. 1, the shell 16 and the shell 17 are arranged side by side in the vertical direction, and pipe lines 24 provided at a plurality of places (two places in the example of FIG. 1) are communicated with each other via a flange joint 23. ing.

  As shown in FIG. 9, the flange joint 23 provided in the pipe line 24 has flange parts 23 </ b> A and 23 </ b> B extending outward from the end portions of the divided parts of the pipe line 24, and these flange parts 23 </ b> A and 23 </ b> B are provided on the flange parts 23 </ b> A and 23 </ b> B. Is provided with a bolt through hole 25 for inserting a bolt as a fastening means. Further, a circumferential first seal groove 26 is formed concentrically with the duct 24 on the flange surface of one flange portion 23B, and the first seal groove 26 is formed on the flange surface of the other flange portion 23A. A concave seal-like second seal groove 28 that is shallower than the first seal groove 26 is formed in the corresponding portion. A seal member 27 having rubber-like elasticity is fitted into the first seal groove 26. The configurations and dimensional relationships of the first and second seal grooves 26 and 28 and the seal member 27 are the same as those of the first and second seal grooves 20 and 22 and the seal member 21 described above. That is, the cross-sectional shape of the seal member 27 cut at a right angle to the longitudinal direction is such that the width dimension B is smaller than the width dimension b of the first seal groove 26 and the thickness dimension H is the first and second seal grooves. It is formed in a square or rectangle larger than the total depth of 26 and 28. The circumferential length of the inner circumferential surface of the seal member 27 is the same as the circumferential length of the inner circumferential side wall surface of the first seal groove 26, or the circumferential length of the inner circumferential side wall surface of the first seal groove 26. It is formed shorter within a range of 1% or less. Furthermore, the cross-sectional area of the seal member 27 is set smaller than the total cross-sectional area of the first and second seal grooves 26 and 28, and the seal member 27 is also in a state where the flange portions 23A and 23B are tightened. There is a space between the outer peripheral surface of the first and second outer peripheral side walls of the first and second seal grooves 26 and 28 (see FIGS. 6 and 7).

  Next, the seal structure of the shell 15 in which the low temperature regenerator 3 and the condenser 4 are accommodated will be described with reference to FIGS. 4, 6, and 7.

  The shell 15 is divided into two parts at the middle part in the longitudinal direction, and this divided part is connected by a flange joint having the same configuration as the shells 16 and 17 described above. That is, the flange joints of the shell 15 are the first circumferentially formed flange portions 15A and 15B provided at the divided portions of the shell 15 and the flange surface of one flange portion (in this example, the flange portion 15B). The seal groove 29, the second seal groove 31 having the same shape and size as the first seal groove 29 formed on the flange surface of the other flange portion 15A, and the rubber-like elasticity accommodated in the first seal groove 29 It comprises a ring-shaped seal member 30 and fastening means (not shown) such as bolts and nuts for fastening the flange portions 15A and 15B together.

  The flange portions 15A and 15B are provided at the end portions of the divided portions of the shell 15, and are formed in a collar shape extending perpendicularly outward from each end portion. Each of the flange portions 15A and 15B is provided with bolt through holes 19 into which bolts as fastening means are inserted at predetermined intervals.

  The configurations and dimensional relationships of the first and second seal grooves 29 and 31 and the seal member 30 are the same as those of the first and second seal grooves 20 and 22 and the seal member 21 described above. That is, the sealing member 30 has a cross-sectional shape cut at right angles to the longitudinal direction, the width dimension B is smaller than the width dimension b of the first seal groove 29, and the thickness dimension H is the first and second seal grooves. It is formed in a square or rectangle larger than the total depth of 29,31. Further, the circumferential length of the inner circumferential surface of the seal member 30 is the same as the circumferential length of the inner circumferential side wall surface of the first seal groove 29 or the circumferential length of the inner circumferential side wall surface of the first seal groove 29. It is formed shorter within a range of 1% or less. Furthermore, the cross-sectional area of the seal member 30 is set to be smaller than the cross-sectional area of the first seal groove 29, and even when the flange portions 15A and 15B are tightened, the outer peripheral surface of the seal member 30 and the first and second surfaces are sealed. There is a gap between the outer peripheral side walls of the seal grooves 29 and 31 (see FIGS. 6 and 7).

  The shell 18 that houses the high-temperature regenerator 2 is divided into two parts at the middle part in the longitudinal direction, and the divided parts are joined by flange joints having the same configuration as the shells 16 and 17 described above. That is, as shown in FIGS. 5 to 7, the flange joint of the shell 18 includes flange portions 18 </ b> A and 18 </ b> B provided at the divided portions of the shell 18 and end faces of one flange portion (in this example, the flange portion 18 </ b> B). The first seal groove 32 having a circular shape formed in the second seal groove 32, the second seal groove 34 having the same shape and the same size as the first seal groove 32 formed on the flange surface of the other flange portion 18A, and the first seal groove 32 The ring-shaped sealing member 33 having rubber-like elasticity accommodated therein and fastening means (not shown) such as bolts and nuts for fastening the flange portions 18A and 18B together.

  The flange portions 18A and 18B are provided at the end portions of the divided portions of the shell 18, and are formed in a collar shape extending perpendicularly outward from each end portion. Each of the flange portions 18A and 18B is provided with bolt through holes 19 into which bolts as fastening means are inserted at predetermined intervals.

  The configurations and dimensional relationships of the first and second seal grooves 32 and 34 and the seal member 33 are the same as those of the first and second seal grooves 20 and 22 and the seal member 21 described above. That is, the sealing member 33 has a cross-sectional shape cut at right angles to the longitudinal direction, the width dimension B is smaller than the width dimension b of the first seal groove 32, and the thickness dimension H is the first and second seal grooves. It is formed in a square or rectangle larger than the total depth of 32 and 34. Further, the circumferential length of the inner circumferential surface of the seal member 33 is the same as the circumferential length of the inner circumferential side wall surface of the first seal groove 32, or the circumferential length of the inner circumferential side wall surface of the first seal groove 32. It is formed shorter within a range of 1% or less. Furthermore, the cross-sectional area of the seal member 33 is set to be smaller than the total cross-sectional area of the first and second seal grooves 32 and 34, and the outer periphery of the seal member 33 is also in a state where the flange portions 18A and 18B are tightened. There is a gap between the surface and the outer peripheral side walls of the first and second seal grooves 32 and 34 (see FIGS. 6 and 7).

  The joint structure of the absorption chiller / heater according to the embodiment includes a first seal groove 20 (26, 29, 26) having a bottom surface finished on the flange surface of one of the two flange portions coupled to each other. 32), and on the flange surface of the other flange portion, the second seal groove 22 (28, 28, 26, 29, 32) having the same shape and size as the first seal groove 20 (26, 29, 32) and having the bottom surface finished. 31 and 34) and both the front and back surfaces of the seal member 21 (27, 30, 33) are brought into close contact with the bottom surfaces of the first and second seal grooves, so that the sealing performance of the flange joint structure can be improved.

  Further, the second seal groove 22 (28, 31, 34) is formed into an extremely shallow groove shape of about 0.03 mm to 0.05 mm by lightly exposing the flange surface of the flange portion using a finishing tool. Since it forms, compared with the case where the whole flange surface is finished, the area which should be finished can be made small and working time can be shortened.

  Further, since the first seal groove 20 (26, 29, 32) and the second seal groove 22 (28, 31, 34) have the same shape and the same size, the processing machine used for finishing the first seal groove In addition, it is possible to share a machining tool and a numerical control program for controlling the movement trajectory of the tool, simplifying the machining setup and minimizing the equipment to be used.

1 Combustion chamber
2 High temperature regenerator
DESCRIPTION OF SYMBOLS 3 Low temperature regenerator 4 Condenser 5 1st evaporator 7 1st absorber 8 2nd evaporator 10 2nd absorber 11 Refrigerant pump 12 Solution pump 13 Low temperature heat exchanger 14 High temperature heat exchanger 15-18 Shell 15A, 15B A pair of flange portions 16A, 16B A pair of flange portions 17A, 17B A pair of flange portions 18A, 18B A pair of flange portions 19 Through holes
20 First seal groove 21 Seal member 22 Second seal groove 23 Flange joint 24 Pipe line 25 Through hole 26 First seal groove 27 Seal member 28 Second seal groove 29 First seal groove 30 Seal member 31 Second seal groove 32 Second 1 seal groove 33 seal member 34 second seal groove

Claims (3)

Equipped with a regenerator, condenser, evaporator, absorber, heat exchanger, refrigerant pump, and solution pump connected via a pipeline, and the absorbent solution formed by mixing refrigerant and absorbent is enclosed in the vessel And a coupling structure provided in an absorption chiller / heater that exhibits cooling capacity, heating capacity, or hot water generation capacity, and constitutes an outer body of the regenerator, the condenser, the evaporator, and the absorber. In a joint structure of an absorption chiller / heater having one or more shells, at least one of the one or more shells is divided into a plurality of blocks, and the divided portions of the divided shells are coupled to each other.
A flange formed at the end of the divided shell;
Of the two flange portions coupled to each other, a circular section is formed in a circular shape along the flange surface of one flange portion, and the bottom surface is finished more smoothly than the flange surface of the one flange portion. 1 seal groove,
A second seal groove shallower than the first seal groove formed in a circular shape along the flange surface of the other flange portion and having a bottom surface finished more smoothly than the flange surface of the other flange portion;
A cross-sectional shape is formed in a rectangle having a thickness dimension larger than the total depth of the first and second seal grooves and a width dimension smaller than the width dimension of the first and second seal grooves, and A ring-shaped seal member whose back surface is in close contact with the bottom surface of the first seal groove and the bottom surface of the second seal groove;
Fastening means for tightening the two flange portions and bringing the flange surfaces into close contact with each other;
An absorption chiller / heater joint structure characterized by comprising:   The cross-sectional shape of the first seal groove is a rectangle whose width dimension is larger than the depth dimension, and the cross-sectional shape of the seal member in an unloaded state is a square whose width dimension is smaller than the width dimension of the seal groove. Or it is a rectangle, The joint structure of the absorption-type cold / hot water machine of Claim 1 characterized by the above-mentioned. Equipped with a regenerator, condenser, evaporator, absorber, heat exchanger, refrigerant pump, and solution pump connected via a pipeline, and the absorbent solution formed by mixing refrigerant and absorbent is enclosed in the vessel And a coupling structure provided in an absorption chiller / heater that exhibits cooling capacity, heating capacity, or hot water generation capacity, and constitutes an outer body of the regenerator, the condenser, the evaporator, and the absorber. In a joint processing method for an absorption chiller / heater having one or more shells, wherein at least one of the one or more shells is divided into a plurality of blocks, and the divided portions of the divided shells are coupled to each other. ,
Forming a flange at the end of the divided shell;
After forming the first seal groove having a rectangular cross-sectional shape along the flange surface of one of the two flange portions coupled to each other,
Finishing the bottom surface of the first seal groove, finishing the bottom surface smoother than the flange surface of the one flange portion,
When the two flange portions are joined to each other, a finishing process is applied to a portion of the flange surface of the other flange portion facing the first seal groove so that the bottom surface is smoother than the flange surface of the other flange portion. And forming a shallow second seal groove, which is characterized in that it is a joint processing method for an absorption chiller / heater.

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