JPH0596765U - Tube heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a tube heat exchanger capable of preventing cracks and damages in heat transfer tubes and facilitating maintenance work such as parts replacement and repair inspection. [Constitution] During heat exchange between the cooling water supplied into the shell body of the closed shell and the chemical solution supplied into each tube of the heat transfer tube, each tube of the heat transfer tube expands and contracts. At this time, each connector of the heat transfer tube inserted into each insertion hole of the closed shell slides in and out by a dimension corresponding to expansion and contraction, and compressive force applied to each tube of the heat transfer tube Absorbs and relaxes the tensile force to prevent cracks and damages in each heat transfer tube. Moreover, since the heat transfer tube and each connector are integrally assembled and the shell body side and the heat transfer tube side are independently assembled, maintenance work such as component replacement and repair inspection can be easily performed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tube heat exchanger used for exchanging heat between two fluids such as liquid and liquid, gas and liquid, gas and gas.

[0002]

[Prior Art]

 Conventionally, as a tube heat exchanger as described above, for example, as shown in FIG. 2, a heat transfer obtained by bundling a plurality of tubes 17a ... In a shell body 16 formed into a cylindrical shape. The tube 17 is housed and held, and after the flanges 19 and 19 are fitted and fixed to both ends of the shell body 16 on the opening side through the split rings 18 and 18, respectively, the shell body 16 and the flanges 19 and 19 are connected to each other. Each O-ring 22, which is fitted between the end faces of the shell body 16 and each of the flanges 19 and 19, which are tightened and fixed with each of the bolts 20 and each of the nuts 21, and the heat transfer tube 17 and each of the flanges 19 and 19, There is a tube-type heat exchanger 15 that seals in a watertight state with the O-rings 23 and 24 fitted between the opposing peripheral surfaces of and.

[0003]

[Problems to be solved by the device]

 However, in the tube heat exchanger 15 described above, the tubes 17a of the heat transfer tube 17 try to expand and contract at the time of heat exchange between the two fluids, but the shell body 16 causes the tubes of the heat transfer tube 17 to expand and contract. .. are prevented from expanding in the radial direction, and both end portions on the opening side of the shell body 16 and both left and right end portions of the heat transfer tube 17 are integrally tightened and fixed by the respective flanges 19, 19. Since excessive compressive force or tensile force is applied to each tube 17a of the heat transfer tube 17 and some of the tubes 17a are cracked or damaged, problems to be solved in terms of strength and durability should be improved. have.

Further, the flange 19, the split ring 18, and the O-rings 22, 23, and 24 are respectively attached to both ends of the shell body 16 on the opening side, and heat is transferred to both ends of the shell body 16 on the opening side. Since the left and right ends of the tube 17 are watertightly sealed and fixed, the assembly structure itself is complicated, and the seal structure on the heat transfer tube 17 side is not independent, and some tubes 17a are cracked or damaged. If the bolts 20 ... and nuts 21 ... are released, the flange 19 and the split ring 18 and the O-rings 22, 23, 24 are released from both ends of the shell body 16 on the opening side. Each of these must be removed to perform work such as parts replacement and repair / inspection, which causes a problem that maintenance work takes time and effort.

In view of the above problems, the present invention absorbs a compressive force or a tensile force applied to the heat transfer tube by inserting and retracting the connector of the heat transfer tube into and from the insertion hole of the closed shell. The objective is to provide a tube heat exchanger that can be mitigated to prevent cracks and damage, and that facilitates maintenance work such as parts replacement and repair inspection.

[0006]

[Means for Solving the Problems]

 This invention stores and holds a heat transfer tube formed by bundling a plurality of tubes in a sealed shell inside, and a heat-transfer tube is bundled in a bundle at the end of a bundle side. Connect the connectors in communication, insert the connector connected to the heat transfer tube into the insertion hole formed in the sealed shell, and seal between the opposed circumferential surfaces of the insertion hole of the sealed shell and the connector of the heat transfer tube. It is characterized in that it is a tube heat exchanger that is slidably retracted by a member.

[0007]

[Action]

 This invention is directed to the sealed shell when each of the heat transfer tubes expands and contracts during heat exchange between the fluid supplied to the sealed shell and the fluid supplied to the heat transfer tube. The heat transfer tube connector inserted in the insertion hole slides in and out by a dimension corresponding to expansion and contraction, and absorbs and relaxes the compressive force and tensile force applied to each tube of the heat transfer tube. In addition, by integrally assembling the heat transfer tube and the connector and making the shell side and tube side assembly structures independent, it is easy to replace each part.

[0008]

[Effect of the device]

 According to this invention, at the time of heat exchange of two fluids, the expansion and contraction of the heat transfer tube is allowed by the sliding movement of the connector, and the compressive force and tensile force applied to the heat transfer tube are absorbed and relaxed. Therefore, it is possible to positively prevent cracks or breakage from occurring in each tube of the heat transfer tube, and improve strength and durability.

In addition, if a part of the tubes forming the heat transfer tube is cracked or damaged, the heat transfer tube and the connector are replaced as they are, so that the conventional heat transfer tube is replaced. It saves the labor and work of disassembling and repairing the entire shell like a tube heat exchanger, and allows easy maintenance work such as parts replacement and repair / inspection, while the shell side and tube side are independent. The attached structure makes it easy to replace each part. In addition, the fluid in the heat transfer tube does not leak when disassembling, and it excels in safety during work and in maintaining the purity of the fluid.

[0010]

【Example】

 An embodiment of the present invention will be described in detail below with reference to the drawings. The drawing shows a tube heat exchanger used for heat exchange between two fluids, a chemical liquid and cooling water. In FIG. 1, the tube heat exchanger 1 is a watertight sealed Inside the mold shell 2, a heat transfer tube 3 formed by bundling a large number of tubes 3a ... In a stretchable manner is stored and held, and cooling water M supplied to the internal space of the closed mold shell 2 is provided. , And heat exchange with the chemical liquid Y supplied to each tube 3a of the heat transfer tube 3.

The above-mentioned closed shell 2 has a shell body 4 formed of a synthetic resin such as PVC in a cylindrical shape, and has a water injection port 4a for injecting the cooling water M on the outer peripheral surface on one end side thereof. A drain port 4b for discharging the cooling water M is formed on the outer peripheral surface of the other end side of the No.4. In addition, two closed plates 5 and 5 made of a synthetic resin such as PVC are fitted to both ends of the shell body 4 on the opening side, and the outer surfaces of the closed plates 5 and 5 are made of metal such as stainless steel. The formed pressing plates 6 and 6 are fitted and the peripheral edges of the shell body 4 and the sealing plates 5 and 5 that are opposed to each other are tightened and fixed by the bolts 7 and the nuts 8 respectively, and the shell body is also formed. 4 between the sealing plates 5 and 5 and the O-rings 9 and 9 made of a synthetic resin such as NBR are fitted between the facing ends of the shell body 4 and the sealing plates 5 and 5. Is sealed watertight.

In addition, the insertion holes 10 and 10 for inserting the connectors 13 and 13 of the heat transfer tube 3 described later are communicated with the central portions of the sealing plates 5 and 5 and the pressing plates 6 and 6, respectively. The connectors 13 and 13 of the heat transfer tube 3 are slidably inserted into the insertion holes 10 and 10 so as to slide in and out, and between the sealing plates 5 and 5 and the opposing peripheral surfaces of the connectors 13 and 13. The O-rings 11 and 11 made of synthetic resin such as NBR are fitted to each other so that the sealing plates 5 and 5 and the connectors 13 and 13 are in a watertight state in which sliding between them is allowed. It is sealed.

The above-mentioned heat transfer tube 3 is formed by bundling a plurality of tubes 3a ... Formed in a small diameter with a synthetic resin such as PTFE or PFA into one tube, and converging both ends of the tubes 3a. The sheath rings 12 and 12 made of synthetic resin such as PFA and PFA are inserted and fixed, and both ends of the tubes 3a on the focusing side and the sheath rings 12 and 12 are integrally heat-sealed to each other. Both ends of each tube 3a on the focusing side are heat-formed into a honeycomb shape.

In addition, connectors 13 and 13 formed of a synthetic resin such as PTFE or PFA are screwed and fixed on the outer peripheral surfaces of the sheath rings 12 and 12 fixed to the left and right ends, respectively, and the connector 13 is connected to one end side. A supply port 13a for supplying the chemical liquid Y is formed at the insertion side end of the connector 13, and a discharge port 13b for discharging the chemical liquid Y is formed at the insertion side end of the connector 13 connected to the other end side. The O-rings 14 and 14 made of synthetic resin such as NBR are fitted between the opposing end faces of the sheath rings 12 and 12 and the connectors 13 and 13, respectively, and the respective sheath rings 12 and 12 and the connectors 13 and 13 are attached. The end faces facing each other are sealed in a watertight state, and the outer peripheral surfaces of the respective sheath rings 12, 12 and the outer peripheral ends of the connectors 13, 13 are welded in a watertight state.

Assuming that the illustrated embodiment is configured as described above, heat exchange by the tube heat exchanger 1 will be described below. First, as shown in FIG. 1, cooling water M is supplied from a water injection port 4a opened at one end side of a shell body 4 constituting a closed shell 2, and a drain port 4b opened at the other end side of the shell body 4. The cooling water M is discharged from the cooling water M, and the cooling water M is circulated and supplied to the internal space of the shell main body 4 forming the closed shell 2. At the same time, the chemical solution Y is supplied from the supply port 13a of the connector 13 connected to one end side of the heat transfer tube 3, and the chemical solution Y is discharged from the discharge port 13b of the connector 13 connected to the other end side of the heat transfer tube 3. During the flow, the chemical solution Y supplied into each tube 3a of the heat transfer tube 3 is cooled to a predetermined temperature by the cooling water M supplied into the shell body 4 of the hermetic shell 2. Heat is exchanged between the chemical solution Y and the cooling water M.

That is, during the heat exchange between the cooling water M supplied into the shell body 4 of the closed shell 2 and the chemical liquid Y supplied into the tubes 3 a of the heat transfer tube 3, heat transfer is performed. When each tube 3a of the tube 3 expands and contracts, the connectors 13 and 13 connected to the left and right ends of the heat transfer tube 3 slide in and out by a dimension corresponding to the expansion and contraction, respectively. Since the compressive force and tensile force applied to each tube 3a of the heat transfer tube 3 are absorbed and relaxed, it is possible to positively prevent cracks or breakage from occurring in each tube 3a of the heat transfer tube 3, thereby improving strength and strength. The durability can be improved.

Moreover, when a crack or damage occurs in a part of the tubes 3a constituting the heat transfer tube 3, the heat transfer tube 3 and the respective connectors 13 and 13 are exchanged while being assembled integrally. Therefore, the labor and work of disassembling and repairing the entire shell like the conventional tube heat exchanger 15 can be saved, and maintenance work such as parts replacement and repair inspection can be easily performed, and the heat transfer tube 3 side Since the shell main body 4 side is an independent assembly structure, each part can be easily replaced. In addition, the chemical solution Y in the heat transfer tube 3 does not leak outside when disassembling, which is excellent in safety and purity retention during work.

In the correspondence between the configuration of the present invention and the above-mentioned embodiment, the fluid of the present invention corresponds to the cooling water M and the chemical liquid Y of the embodiment, and the sealing member is the O-ring 11 in the same manner. However, the present invention is not limited to the configuration of the above-described embodiment.

In the above-described embodiment, the connectors 13 and 13 connected to the left and right ends of the heat transfer tube 3 are inserted into the insertion holes 10 and 10 of the shell body 4, respectively. The connector 13 connected only to one end side of the heat transfer tube 3 may be inserted and retracted into the insertion hole 10 formed at one end side of the heat transfer tube 3. As in the above-described embodiment, the one end side of the heat transfer tube 3 is provided. It is possible to absorb and relax the compressive force and the tensile force applied to each tube 3a of the heat transfer tube 3 by sliding the connector 13 connected to the connector 13 in and out by a dimension corresponding to expansion and contraction.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing the overall structure of a tube heat exchanger.

FIG. 2 is a vertical sectional side view showing a partial structure of a conventional tube heat exchanger.

[Explanation of symbols]

 M ... Cooling water Y ... Chemical liquid 1 ... Tube heat exchanger 2 ... Sealed shell 3 ... Heat transfer tube 3a ... Tube 4 ... Shell body 5 ... Sealing plate 11 ... O-ring 10 ... Insert hole 13 ... Connector

Claims (1)

[Scope of utility model registration request] 1. A heat transfer tube formed by bundling a plurality of tubes into one is housed and held inside a closed shell, and the fluid supplied into the closed shell and the heat transfer tube are supplied. A tube type heat exchanger for exchanging heat with a fluid, wherein a connector is communicatively connected to a converging side end formed by bundling each tube of the heat transfer tubes, and a plug formed in the hermetic shell. A tube-type heat exchanger in which a connector connected to the heat transfer tube is inserted into the hole, and a sealing member seals between the insertion hole of the hermetic shell and the opposing peripheral surface of the connector of the heat transfer tube so as to slide in and out. ..