JPH0596793U - Heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] Conventionally, the inner surface of the heat transfer tube of a multi-tube heat exchanger was cleaned by removing the headers and manually by using a sponge ball, etc. Dropped. The present invention makes it possible to clean the inner surface of the heat transfer tube easily and quickly without removing the header. [Structure] A pair of heat transfer tubes included in a heat exchanger is set as one set, and a loop-shaped flexible member 4 is passed through each set of heat transfer tubes.
In addition, a pair of brushes 5 are fixed to each flexible member at their symmetrical positions. Each flexible member hangs on a wheel in the header on both sides. The flexible member is moved by rotating the wheel manually or by power, and the brush is passed through the heat transfer tube for cleaning.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a multi-tube heat exchanger, and more particularly to cleaning of the inside of a heat transfer tube, which can be suitably implemented in a heat exchanger that uses a fluid containing much dust such as exhaust gas.

[0002]

[Prior Art]

 Conventionally, a multi-tube heat exchanger is composed of headers arranged on both sides and a large number of heat transfer tubes arranged in parallel between them, and the fluid flowing in the tubes flows from one header to form a group of It flows through the heat transfer tubes, enters the header on the other side, and then returns to the header on one side through the heat transfer tubes of the other group. In this way, it is configured to flow back and forth or meandering through the header and the heat transfer tube, during which heat is exchanged with the fluid outside the tube.

In this type of heat exchanger, the heat exchange performance deteriorates when dust or scale adheres to the inner surface of each heat transfer tube due to the passage of operating time. Therefore, the heat exchange performance is deteriorated or heat exchange occurs at predetermined time intervals. The operation of the heat exchanger is stopped, and the inner surface of each heat transfer tube is cleaned. At the time of cleaning, each header part was removed and cleaning was done manually with a sponge ball.

[0004]

[Problems to be solved by the device]

 In particular, when a fluid with a lot of dust such as exhaust gas is used, it is necessary to clean the inside of the pipe frequently, which reduces the operating rate of the heat exchanger and requires a lot of manpower and cost. It was

An object of the present invention is to eliminate the above-mentioned problems of the prior art, and therefore to provide a heat exchanger having a structure capable of easily and quickly cleaning the inner surface of each heat transfer tube. ..

[0006]

[Means for Solving the Problems]

 The feature of the multi-tube heat exchanger according to the present invention is that a large number of heat transfer tubes 1 included therein are paired, and each set of heat transfer tubes is provided with a flexible member such as a loop-shaped wire. 4 and a brush 5 for cleaning the inside of the pipe is fixed at a symmetrical position of the flexible member, and each loop-shaped flexible member is installed in each of the headers on both sides. The flexible member is movable by being rotated by the wheel. Therefore, at least one end of the shaft of the wheel in one of the headers projects outside from the header, and the handle or the driven wheel is attached thereto.

[0007]

[Action]

 When cleaning the inner surface of the heat transfer tube, the wheel is rotated by the handle or the transmission wheel attached to the end of the shaft of the wheel in the header, and the flexible member 4 is moved by it. One brush 5 attached to the flexible member is passed from one end of the heat transfer tube to the other end, and the other brush 5 is passed from one end of the heat transfer tube on the other side to the other end, and each brush is attached to the inner surface of the tube. Clean by touching. The operation of the wheel stops when each brush comes out of each heat transfer tube.

[0008]

【Example】

 1 to 3 show an embodiment of a heat exchanger according to the present invention. As shown in the drawing, this heat exchanger is also provided with a large number of heat transfer tubes 1 arranged in parallel with each other. Headers 2 and 3, so that each heat transfer tube is arranged between the headers on both sides of the heat transfer tube so that the fluid in the tube flows from one header to another header. As shown in FIG. 3, the fluid flowing in the pipe flows into the header from one side of one header-2 and passes through an appropriate number of heat transfer tubes 1 to enter another header-3, where It folds back and returns to the previous header-2 through another appropriate number of heat transfer tubes 1, where it flows out or folds to flow.

As shown in FIG. 1, the fluid flowing outside each heat transfer tube flows at a right angle to the heat transfer tube 1, flows in from one side and flows out to the other side, and the heat and the fluid in the tube flow between them. It is replaced and heated or cooled. The heat transfer tubes that make up the tube bundle are arranged in a staggered manner in order to make good contact with the fluid flowing out of the tube.

The heat exchanger according to the present invention is characterized in that, as shown in FIGS. 1 and 2, a flexible member such as a wire 4 is passed through each heat transfer tube to clean the inner surface of the heat transfer tube 1. That is, the brush 5 passes through the inside of the pipe by the ear. Therefore, all the heat transfer tubes are paired so that a pair of heat transfer tubes 1 that are in close proximity to each other form a pair, the loop-shaped wires are passed through the heat transfer tubes 1 of each pair, and each wire is driven. Is becoming The brushes 5 are fixed at symmetrical positions on each wire 4, so that each wire has a pair of brushes 5.

These wires 4 are hung on respective wheels provided in the respective headers-2 and 3, in this embodiment, pulleys 6 and 7, and one pulley is operated manually or by power. The wire 4 is driven by rotating. The pulley in each header is attached to the shafts 8 and 9 common to each row of tubes, and each shaft is supported by the bearing 10 provided in the header. Accordingly, the pulleys are configured to be driven together for each tube row.

Since the wires 4 are driven by the rotation of the pulleys 6 and 7, one end of a shaft 8 provided on one header-2 is passed through a seal bearing 11 to the outside as shown in FIGS. 2 and 3. A manually operated handle 12 or a driven wheel is attached to the protruding portion 8a. The driven wheel may be any such as a V-belt pulley or gear driven by a motor. Needless to say, an attachment portion such as a handle may be provided on another header-3 for an appropriate number of tube rows, if desired.

When the heat exchanger is in operation, as shown by the brushes 5 in FIG. 1, each brush comes out of the respective heat transfer tubes 1 and is located in the headers-2 and 3, and therefore the fluid flow in the tubes is prevented. There is no hindrance, and heat is exchanged between the fluid inside the pipe and the fluid outside the pipe in a meandering manner through each header, and it operates normally.

If a scale such as dust accumulates on the inner surface of each heat transfer tube 1 due to the passage of the operating time, the performance deteriorates. Therefore, it is necessary to clean the inner surface of each heat transfer tube, and in that case, the pulley 6 may be rotated by the handle 12 or by the power through the shaft 8, whereby the loop-shaped wire 4 and the wire 4 The brush 5 moves. By the rotation of the pulley 6, each brush 5 enters the corresponding heat transfer tube 1 from one end and passes through the inside thereof and exits from the other end as shown by 5a in FIGS. 1 and 2. At that time, each brush 5 comes into contact with the inner surface of the pipe to clean it. The pulley 6 is driven until the brush 5 comes out of the heat transfer tube.

Such cleaning of the inside of the pipe by driving the pulley is usually performed by stopping the operation of the heat exchanger. However, since the cleaning can be performed for each pipe row, a plurality of pipe rows exist. However, it is possible to clean the inside of the pipe without stopping the operation.

Although the wire is used as the supporting member of the brush 5 in the above-described embodiment, a flexible member such as a chain or a timing belt may be used instead of the wire, and in that case, -Instead of the reel, other wheels are used, such as chain wheels or toothed wheels.

[0017]

[Effect of the device]

 As described above, according to the present invention, it is not necessary to disassemble the header at the time of cleaning, and the brush can be passed through the inside of the pipe through the wheel and the loop-shaped flexible member for cleaning. It can be cleaned easily and quickly. In some cases, it is possible to perform cleaning without stopping the operation, which can increase the operation rate of the heat exchanger. It is also possible to clean it more frequently, which avoids the accumulation of dust in the pipe and ensures consistent performance.

[Brief description of drawings]

1 is a cross-sectional plan view showing a heat exchanger according to an example of the present invention with a part thereof omitted.

FIG. 2 is a side sectional view showing a part of the heat exchanger shown in FIG.

FIG. 3 is a plan view showing a part of the portion shown in FIG.

[Explanation of symbols]

 1 Heat Transfer Tube 2 Header-3 Header-4 Flexible Member 5 Brush 6 Wheel 7 Wheel 8 Shaft 12 Handle

Claims (1)

[Scope of utility model registration request] 1. A multi-tube heat exchanger in which a large number of heat transfer tubes are installed in parallel between headers on both sides, which are respectively hung on respective wheels provided in the headers on both sides and respectively. A flexible member formed in a loop shape through a pair of the heat transfer tubes, and a brush fixed at a symmetrical position of each loop flexible member, and at least one of the header- The heat exchanger according to claim 1, wherein one end of the shaft of the wheel projects to the outside so that a handle or a driven wheel can be attached.