JPH073834U - Hairpin tube insertion device for heat exchanger - Google Patents

Abstract

(57) [Summary] (Modified) [Objective] To provide a hairpin tube insertion device of a heat exchanger capable of simultaneously inserting a plurality of tubes. [Structure] A plurality of heat radiating fins 8 having a plurality of through holes 10 through which a hairpin tube 9 is inserted and formed in a certain pattern are stacked so that the patterns match each other. And a reciprocating body 2 having a vibrating device 5 for each cylinder, and a reciprocating body moving forward. When the body is inserted into the heat exchanger body, the other end side radiation fin 8b
A plurality of cylindrical bodies protruding from the through holes, and a plurality of hairpin tubes whose open end portions 9a are positioned so as to face each other. Inside each tube, when the tube approaches the open end of the hairpin tube, it enters from the tube into the open end and the inner peripheral surface of the hairpin tube
When the reciprocating body is pushed back by pressing 9b, a hairpin tube holding body 3 is provided which can be inserted and withdrawn so as to guide and insert each of the hairpin tubes through the through hole of the heat radiation fin 8b into the heat radiation fin 8a through the tubular body. ..

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hairpin tube insertion device for a heat exchanger.

[0002]

[Prior art]

 Conventionally, when a hairpin tube for expanding a pipe is inserted into each of a plurality of radiating fins forming a heat exchanger, as shown in FIG. 4, the through-hole 13 for inserting the hairpin tube 12 for expanding a pipe is fixed. In order to match the respective patterns of the plurality of radiating fins 14 formed in this pattern, the plurality of radiating fins 14 are stacked and housed in a predetermined frame 16 to form the heat exchanger main body 15, and then the From the through hole 13 of the heat radiation fin 14a on one end side of the heat exchanger main body 15 housed in the frame body 16, the worker himself manually feeds the hairpin tube 12 for expansion to the heat radiation fin 14b on the other end side. Was.

[0003]

[Problems to be solved by the device]

 However, when the operator himself manually inserts the hairpin tubes for tube expansion into the through holes of the heat radiation fins stacked as in the conventional case, there are the following problems.

That is, the plurality of stacked plate-shaped heat radiation fins are provided with a plurality of through holes for inserting the hairpin tube in various patterns depending on the type of heat exchanger.

Therefore, when a hairpin tube for expanding a pipe is sequentially inserted by hand into each of the radiating fins that are provided with a plurality of insertion holes in a predetermined pattern and are stacked, a predetermined interval is provided. In order to easily and instantly insert the two bent hairpin tubes into the respective through holes of the heat radiation fin at the same time, there is no difference in size in advance between the through holes of the heat radiation fins. Must be positioned on the same straight line, but the position of each through hole of each of the radiation fins stacked above is by no means highly accurate and accurate. It is processed by a lathe.

Therefore, in order to position the respective through holes of the heat radiation fins on the same straight line, even if the respective heat radiation fins are accurately aligned through the frame body, the through holes of the plurality of heat radiation fins are not necessarily aligned. Since they cannot be positioned on the same straight line, not only a lot of time loss occurs when the hairpin pipes for pipe expansion are sequentially inserted by hand into the through holes of the heat radiation fins stacked, but also There was a serious problem of causing a decline in the productivity of the heat exchanger.

However, the present invention solves the above-mentioned problem and folds easily and instantly at predetermined intervals in the through holes of the plurality of heat radiation fins forming the heat exchanger. To provide a hairpin tube insertion device for a heat exchanger, which is capable of inserting a plurality of curved hairpin tubes at the same time and which has extremely excellent workability and has extremely high heat exchanger production efficiency. Is an issue.

[0008]

[Means for Solving the Problems]

 That is, the present invention is a heat exchanger formed by stacking a plurality of radiation fins 8 each having a plurality of through holes 10 for inserting a hairpin tube 9 formed in a constant pattern so as to match the patterns. A cylindrical body 4 that can be inserted from the through hole 10 of the radiating fin 8a on one end side of the main body 7 to the radiating fin 8b side on the other end side, and the cylindrical body 4 can be reciprocated by facing the heat exchanger main body 7 And a reciprocating body 2 having a cylindrical body vibrating device 5 that vibrates each of the cylindrical bodies 4, and the reciprocating body 2 approaches the heat exchanger main body 7 side to move the cylindrical body 4 In order to make each of the open end portions 9a face the plurality of cylindrical bodies 4 projecting from the through holes 10 of the heat radiation fins 8b on the other end side of the heat exchanger body 7 when inserted into the heat exchanger body 7. It is composed of a plurality of hairpin tubes 9 positioned at predetermined positions, and each of the cylinders 4 has a cylindrical shape. When approaching or abutting the open end 9a of the hairpin tube 9, it enters from the inside of the tubular body 4 into the open end 9a and presses the inner peripheral surface part 9b of the hairpin tube 9 while performing the reciprocating operation. When the body 2 is separated from the heat exchanger main body 7, each of the hairpin tubes 9 is radiated through the through hole 10 of the radiating fin 8b on the other end side through the cylindrical body 4 that retracts together with the reciprocating body 2. The point is that the hairpin tube holder 3 for guiding and inserting it into the fin 8a is provided at the entrance and exit.

[0009]

[Action]

 In the hairpin tube insertion device of the heat exchanger configured as described above, the reciprocating body 2 that reciprocates the cylinder body 4 facing the heat exchanger body 7 vibrates each of the cylinder bodies 4. Since the device 5 is provided, each of the through holes 10 of the plurality of heat radiation fins 8 stacked via the tubular body 4 which moves forward while vibrating can be easily and instantly provided via the tubular body 4. Can be aligned on a straight line.

Further, when the reciprocating body 2 approaches the heat exchanger body 7 side and the cylindrical body 4 is inserted into the heat exchanger body 7, the heat radiation fins on the other end side of the heat exchanger body 7 When the tubular body 4 approaches or abuts the opening end 9a of the hairpin tube 9, the plurality of tubular bodies 4 protruding from the through hole 10 of 8b are moved from inside the tubular body 4 to inside the opening end 9a. And presses the inner peripheral surface portion 9b of the hairpin tube 9, and when the reciprocating body 2 is separated from the heat exchanger main body 7, the hairpin is inserted through the tubular body 4 that retracts together with the reciprocating body 2. Since the hairpin tube holder 3 for guiding and inserting each of the tubes 9 from the through hole 10 of the heat radiating fin 8b on the other end side to the heat radiating fin 8a on the one end side is provided so as to be retractable, The heat radiating fins 8 in which the through holes 10 are aligned in a straight line through the vibration of The hairpin tube 9 for expanding from the through hole 10 of 8b to the radiating fin 8a on one end side can be easily and simultaneously guided and inserted without contacting the non-through hole portion 10a of each radiating fin. .

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 indicates a hairpin tube insertion device of a heat exchanger, 1a indicates a hairpin tube insertion device body, and 1c is provided on a base 1b of the hairpin tube insertion device body 1a. 3 illustrates a holder of a heat exchanger.

Reference numeral 2 denotes a heat exchanger formed by stacking a plurality of radiation fins 8 each having a plurality of through holes 10 for inserting the hairpin tube 9 formed in a certain pattern so as to match the pattern. The hairpin tube insertion device for facing the heat exchanger body 7 with a plurality of cylindrical bodies 4 which can be inserted from the through holes 10 of the heat radiation fins 8a at one end of the main body 7 to the heat radiation fins 8b at the other end. The reciprocating body provided on the base 1b of the main body 1a so as to reciprocate (arrow A) is shown.

Reference numeral 3 denotes a hairpin tube holder provided in each of the cylindrical bodies 4, and as shown in FIG. 2, a hollow rod (rod-shaped body) 3 a that reciprocates in the cylindrical body 4 and the hollow body 3 a. It can be expanded and contracted in a direction intersecting with the axial direction of the hollow rod 3a via a wire (linear body) 3b which is provided at the tip of the rod 3a and reciprocates along the axial direction of the hollow rod 3a. The expansion / contraction body 3c is provided with four expansion / contraction pieces 3d, and in a natural state, the expansion / contraction body 3c is in the shape of a bale so as to have a biasing force in the axial direction of the hollow rod 3a. It is made of an elastic material that retains its shape.

Reference numeral 5 denotes a cylindrical vibrating device for individually vibrating the cylindrical body 4 provided in the reciprocating body 2 so as to be inserted into the through hole 10 of the radiating fin 8. It is provided inside.

Reference numeral 6 denotes a hairpin tube holder driving device which is provided in the reciprocating body 2 and drives the hairpin tube holders respectively.

Reference numeral 11 denotes a hairpin tube positioning / accommodating portion formed on the base 1b, and a heat exchanger for each product number and type, which uses the radiation fins 8 in which the plurality of through holes 10 are formed in a predetermined pattern in advance. A hairpin tube holding jig 11a equipped with a hairpin tube holder 11b for aligning the open end portions 9a of the hairpin tubes 9 with the pattern of the through holes 10 according to the main body 7 is provided from one direction. It can be freely inserted and removed.

The base 1b is provided with a mechanism that allows the heat exchanger body 7 to be inserted and removed from one direction of the base 1b, like the hairpin tube 9.

The hairpin tube insertion device of the heat exchanger according to the present embodiment has the above-described structure. The hairpin tube for expanding the heat exchanger formed through the radiation fins stacked by using the device described below. A case of inserting will be described.

First, as shown in FIG. 2 (a), each of the cylindrical vibrating devices 5 provided in the reciprocating body 2 of the hairpin tube insertion device 1 of the heat exchanger having the above-described structure is driven to drive each of them. By vibrating the cylindrical body 4 (arrow I) and moving the reciprocating body 2 forward (arrow B) to the heat exchanger main body 7 as shown in FIG. It is possible to easily and instantly align the through holes 10 of the radiating fins 8 that are overlapped with each other through the vibrations of the tubular body 4 in a straight line. It projects (arrow C) from the heat radiation fin 8b on the end side.

Next, as shown in FIG. 2B, when each of the cylinders 4 approaches the opening end 9a of each hairpin tube 9, each of the hairpin tube holders 3 in the cylinder 4 is closed. Through the hairpin tube holder driving device 6 provided on the reciprocating body 2, the hairpin tubes 9 enter into the inside of the tube from the respective open ends 9a of the hairpin tubes 9 (arrow D).

After that, the wire 3b of the hairpin tube holder 3 is pulled (arrow E) through the hairpin tube holder driving device 6 so that the four expansion members 3c at the tip of the hairpin tube holder 3 are pulled. The expansion / contraction piece 3d expands (arrow F) and presses the inner peripheral surface portion 9b of the hairpin tube 9.

Therefore, the four expansion / contraction pieces 3d of the expansion / contraction body 3c at the tip of the hairpin tube holder 3 are enlarged (arrow F), and the reciprocating operation is performed while pressing the inner peripheral surface portion 9b of the hairpin tube 9. By retreating the body 2 (arrow G) as shown in FIG. 3C, the through holes 10 are aligned in a straight line to the through holes 10 of the radiation fins 8 through the vibration of the cylindrical body 4. The hairpin tube 9 for expanding from the through hole 10 of the radiation fin 8b on the other end side of the radiation fin 8 to the radiation fin 8a on the one end side of the radiation fin 8 without contacting the non-through hole portion 10a of each radiation fin. The guide insertion (arrow H) can be easily performed at the same time.

In the above embodiment, the hairpin tube holder is provided with a hollow rod that reciprocates in each of the cylinders provided in the reciprocating body, and the hollow rod is provided at the tip of the hollow rod. An expanding / contracting body having four expanding / contracting pieces that are expandable / contractible in a direction intersecting with the axial length direction of the hollow rod via a wire (linear body) that reciprocates along the axial length direction of the rod, In the natural state, the expandable / contractible body is formed of an elastic body that retains its own shape in a bale shape so as to have an urging force in the axial direction of the hollow rod. The expansion / contraction body need not be configured to be freely expandable / contractible via a wire that reciprocates along the direction. In short, a rod-shaped body that reciprocates in the cylindrical body and reciprocates along the axial direction of the rod-shaped body. (EN) An expandable / contractible body provided at the tip of the rod-shaped body is made expandable / contractible via a linear body. The linear body may be formed in a long shape by a thin rod rod, wire or a flexible material as long as it is capable of forming a rod. Alternatively, it may be a prismatic lot rod or the like.

Further, the expansion / contraction body is also composed of an expansion / contraction body provided with four expansion / contraction pieces capable of expanding / contracting in a direction intersecting with the axial direction of the rod-shaped body, and the expansion / contraction body in the natural state is The hollow rod is formed of an elastic body that retains its shape in a bale-like shape so as to exert a biasing force in the axial direction of the hollow rod. The present invention is not limited to any particular structure, and the point is that the inner peripheral surface of the hairpin tube can be expanded and contracted so that it can be pressed through a linear body, and the hairpin tube holder can be a rod-shaped body, a linear body, or a scaled body. Although it is constructed, it goes without saying that it is not necessarily an essential requirement of the present invention.

Further, in the above-described embodiment, the cylindrical body vibration device is provided in each of the cylindrical bodies for individually vibrating the cylindrical bodies provided in the reciprocating body. The cylindrical vibrating device may be provided with only one reciprocating body or the base, as long as it can vibrate. The type and number of vibrations are also not limited.

Further, in the above-mentioned embodiment, the cylindrical body provided with the hairpin tube holder is arranged in advance in a predetermined pattern on the reciprocating body. The reciprocating body may be individually movable on one side surface of the reciprocating body along the pattern of the through holes provided, or the cylindrical body arranged at a predetermined position may be attached to or detached from the reciprocating body. It may be configured to have a flexible mechanism.

[0028]

[Effect of device]

 As described above, according to the present invention, the reciprocating body that reciprocates the cylinder body so as to face the heat exchanger body is provided with the cylinder vibrating device that vibrates each of the cylinder bodies. It is possible to easily and instantly align the through holes of the plurality of heat radiation fins that are stacked through the advancing cylinder with each other through the cylinder.

Further, when the reciprocating body approaches the heat exchanger body side and the cylindrical body is inserted into the heat exchanger body, the reciprocating body projects from the through hole of the heat radiation fin on the other end side of the heat exchanger body. When the tubular body approaches or comes into contact with the open end of the hairpin tube, the plurality of tubular bodies are pushed into the open end from the tubular body and press the inner peripheral surface of the hairpin tube. When the reciprocating body is separated from the heat exchanger main body, each of the hairpin tubes is designed to pass from the through hole of the heat radiating fin on the other end side to the heat radiating fin on the one side side via the cylindrical body retracting together with the reciprocating body. Since the hairpin tube holder to be inserted is provided so that it can be retracted and retracted, the other end of the heat radiation fin is attached to the heat radiation fin whose through holes are aligned in a straight line through the vibration of the tubular body. Hairpin for expansion from the through hole of the side heat radiation fin to the heat radiation fin on one end side The pipes can be guided and inserted easily without contacting the non-through holes of the respective radiation fins, and at the same time.

Therefore, a plurality of two hairpin tubes which are bent at a predetermined interval easily and instantly through the respective through holes of the plurality of heat radiation fins forming the heat exchanger are simultaneously provided. The hairpin tube insertion device for a heat exchanger, which has an extremely high workability in which it can be inserted and has a very high heat exchanger production efficiency, can be provided, which has the special effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing a hairpin tube insertion device of a heat exchanger according to the present invention.

2A and 2B show a cylindrical body of a hairpin tube insertion device for a heat exchanger according to the present invention, in which FIG. 2A is a perspective view and FIG. 2B is same as FIG.
JJ line sectional view of the same, (C) is a KK line sectional view of the same figure (A).

FIG. 3 shows the use state of the hairpin tube insertion device of the heat exchanger of the present invention, FIG. 3B is a plan view when the tubular body is inserted into the heat exchanger, and FIG. An enlarged cross-sectional view of an essential part when the inner peripheral surface portion of the hairpin tube is pressed by the body, and the same figure (c) is a plan view when the hairpin tube is guided and inserted into the heat exchanger.

FIG. 4 is a front view showing a state during insertion work of a conventional hairpin tube.

[Explanation of symbols]

 1 ... Hairpin tube insertion device of heat exchanger 1a ... Hairpin tube insertion device main body 2 ... Reciprocating body 3 ... Hairpin tube holder 4 ... Cylindrical body 5 ... Cylindrical body vibrating device 6 ... Hairpin tube holder driving device 7 ... Heat exchange Main body 8 ... Radiating fin 9 ... Hairpin tube 10 ... Through hole

Claims (2)

[Scope of utility model registration request] 1. A radiating fin in which a plurality of through holes (10) for inserting a hairpin tube (9) are formed in a fixed pattern.
Each of the (8) is a radiation fin on one end side of the heat exchanger main body (7) formed by stacking a plurality of patterns so that the patterns match each other.
A cylindrical body (4) that can be inserted from the through hole (10) of the (8a) to the heat radiation fin (8b) side on the other end side, and the cylindrical body (4) is the main body of the heat exchanger.
A reciprocating body having a cylindrical vibrating device (5) which is opposed to (7) and can reciprocate, and which vibrates each of the cylindrical bodies (4).
(2) and the reciprocating body (2) approaches the heat exchanger body (7) side, and when the tubular body (4) is inserted into the heat exchanger body (7), the heat exchanger Open ends of the plurality of cylindrical bodies (4) protruding from the through holes (10) of the heat radiation fins (8b) on the other end side of the main body (7).
(9a) is composed of a plurality of hairpin tubes (9) positioned at predetermined positions so as to face each other, and the respective cylindrical bodies
(4) When the tubular body (4) approaches or abuts the opening end (9a) of the hairpin tube (9), the inside of the tubular body (4) inside the opening end (9a) And presses the inner peripheral surface portion (9b) of the hairpin tube (9) and the heat exchanger body of the reciprocating body (2).
At the time of separation from (7), each of the hairpin tubes (9) is passed through the through hole (10) of the heat radiation fin (8b) on the other end side through the tubular body (4) retracting together with the reciprocating body (2). A hairpin tube insertion device for a heat exchanger, characterized in that a hairpin tube holder (3) for guiding and inserting the heat radiation fins (8a) at one end side is provided so as to be able to move back and forth. 2. The hairpin tube holder (3) is the cylindrical body.
(4) A rod-shaped body (3a) that reciprocates inside, and a linear body (3b) that is provided at the tip of the rod-shaped body (3a) and that reciprocates along the axial direction of the rod-shaped body (3a). ) Via an expansion / contraction body (3c) which is expandable / contractible in a direction intersecting the axial direction of the rod-shaped body.
Hairpin tube insertion device for the heat exchanger described.