JPS59158995A - Tube cleaner for heat exchanger - Google Patents

Abstract

PURPOSE:To obtain a tube cleaner having easily detachable housing cases which are highly reliable in attaching, by attaching the cases to both ends of a water tube utilizing the tensile stress of a string body. CONSTITUTION:Cleaner cases 5 and 5' are attached to both ends of a tube 2 which is attached to tube plates 3 and 3'. A string body 10 piercing through the tube 2, and the cases 5 and 5' on both sides, is used for attaching. The cases 5 and 5' are fixed to both tube plates 3 and 3' by the tensile force of the string body 10 of which both ends are fixed to fixing plates 11 and 11'. A cleaner 6 is made hollow and the string body 10 pierces through the hole 61 of a cleaner. Accordingly, the cleaner 6 performs reciprocating movement from right to left along the string body 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tube cleaning device for a heat exchanger. In particular, when a container is installed at both ends of the tube and a cleaning material such as a brush or sponge ball is moved around the inside of the tube to clean it, the direction of the internal fluid flow is directed in the forward direction using a valve provided at the inlet and outlet of the heat exchanger. The present invention also relates to a tube cleaning device for a heat exchanger that cleans the inner walls of the tubes by applying cleaning material while switching in the opposite direction at appropriate times.

Conventionally, cleaning material storage containers are provided in the water chambers at both ends of the heat exchanger to store cleaning materials, but these storage containers are attached to both ends of each individual tube, so that the storage containers do not come off the tubes. Alternatively, a groove may be cut into the inner surface of the tube and the container may be fixed by expanding the tube, or the end of the container may be made into a separate elastic structure so that only the end can be removed.

With the method of fixing the container as is, it is difficult to replace the cleaning material if the internal cleaning material becomes damaged, and with the method of making the end part removable, it is possible to maintain the cleaning material, but
The main body of the container must be removed by gluing or expanding the tube. If there are many tubes in J-, it will take a lot of effort, and installation methods such as gluing and tube expansion may be difficult.
However, they had drawbacks such as low reliability, cracking due to excessive tube expansion, and disconnection due to insufficient tube expansion.

This invention attempts to eliminate these drawbacks, and by making it possible to reach both ends of the water pipe using the tension of the string-like body, the reliability of the installation is high.
Moreover, it is possible to provide a tube cleaning device having a simple container for adding and removing the tube.

To explain the figure, Fig. 1 shows a conventional device,
The tubes 2 in the heat exchanger 1 are inserted into the tube plate 3 by a method such as tube expansion. There are water chambers 4 at both ends of the heat exchanger.
The fluid flows into the water chamber 4, passes through the tube 2, and flows out from the ice chamber on the opposite side.A storage container 5 is attached to both ends of the tube by a method such as gluing or tube expansion.
A tube cleaning material 6 is stored therein. In FIG. 1, the flow direction of the fluid in the tube is rightward in the drawing, so the cleaning material 6 is stored in the container 5 on the right side. The flow also flows from the left side to the right side as shown by arrow R in the figure, from the tube 2 to the storage container 5 on the right side of the tube, and through the small hole 51 of the storage container.
It flows out into the water chamber 4 on the right side.

(The structure on the left side of the heat exchanger is the same as the right side and is not shown in the diagram.) By switching the valve (not shown) connected to the heat exchange entrance and exit, the flow direction can be reversed to the left. For example, the cleaning material 6 is pushed from the container by the fluid that has entered the small hole 52 at the left end of the container 5 and enters the tube 2, and is pushed inside the tube 2 by the fluid from behind, cleaning the inside of the tube 2. , is held in a receptacle similarly mounted within the water chamber (not shown) on the opposite side of the flow.

As mentioned above, this conventional device requires a lot of effort to install the storage container, and has low reliability (. The cleaning material storage containers 5.5' are attached to both ends of the tube 2 attached to the tube plate 3.3'. Using a penetrating string-like body 10,
By means of fixing plates 11,11' fixed at both ends, the container is fixed to both tube sheets by the tension of the string. The cleaning material 6 is formed hollow, and the string-like body 10 passes through a hole 61 in the cleaning material. Therefore, the cleaning material 6 reciprocates from side to side along the string-like body 10.

Fig. 3 shows an embodiment in which the string-like body 10 is made of an elastic material such as rubber or spring material, Fig. 3 (tA) is a side sectional view, and Fig. 3 (B)
3 is an end view of N seen from the direction of arrow R, in which the fixing plate 11 fixed to the tip of the string 10 is raised to the end surface of the storage container 5 as shown at 11'' in FIG. 3 β). It is pulled out from the elongated hole 53, turned gO0, hooked on the end face of the storage container 5, and the storage container is fixed as shown in FIG.

FIG. 4 shows an embodiment in which a groove 53 is provided to prevent the fixing plate from moving, FIG. 4(A) is a side sectional view, and FIG. 4(B) is a view taken along the line A-A in FIG. 4(A). In this figure, the fixing plate 11 is pulled out from the elongated hole 53 on the end face of the storage container and turned 90' as in the case of Fig. 3, but in the embodiment of Fig. 4, the elongated hole 53 A groove 54 is provided in the direction perpendicular to , and the fixing plate 11 is fitted therein to fix it so that it does not move.

In the embodiment of FIG. 5, FIG.
A) and Fig. 5 fA) viewed from the R direction in Fig. 5 03
) As shown in (the elongated hole on the end face of the storage container, 530 has a protrusion 55 on both sides, and a groove 54 is provided in the elongated hole 55. Pull out the fixing plate 11 from the elongated hole 53 and turn it 90 degrees. When fitted into the groove 54, the fixing plate 11 is fixed in the same manner as in each of the above embodiments.

FIG. 6 shows a device for adjusting the tension of the string-like body 10, in which a fixing plate 11 at the tip of the string-like body 10 is slid left and right by a bolt 12, and the tension of the string-like body 10 is adjusted to the length l of the port 12.
Adjust the height.

FIG. 7 shows another example of adjustment, and FIG. 7(A) is a side sectional view;
FIG. 7(B) is a view of FIG. 7(Al) viewed from the R direction, and the tip of the string-like body 10 is fixed to a screw 13, which is screwed into the end surface of the storage i55.

By inserting a screwdriver or the like into the screw groove 1-4, the screw 13 is rotated and slid from side to side, thereby adjusting the tension of the string-like body 10. (Fixing plate 11 is not required in the embodiment of FIG. 7). This device allows adjustment of the length l of the screw 13.

Fig. 8 shows yet another adjustment example, in which step-shaped groove plates 56 are attached to both sides of the hole 53 along the circumference of the end face of the container. FIG. 8(A) is an end view thereof, and FIG. 8(CB) is a BB view taken along arrow H, with a lower groove 54 and a higher groove 54 located at opposing positions. ' is provided. Therefore, after the fixing plate 11 is pulled out through the hole 53, the tension of the string-like body 10 can be adjusted in two stages by locking it in the groove 54 or in the groove 54'.

FIG. 9 shows another embodiment of the invention, in which the same reference numerals '&co designate the same parts as in FIG. 1 and the following drawings.

In the example shown in FIG. 9, a coiled spring material is used as the string-like body 10, which passes through the tube 2 at both ends with a gap W between it and the inner wall of the tube 2, and fixes the container 5 by its tension. . The cleaning material 6 is a sponge ball with a diameter of about 2W. A plurality of sponge balls can be passed through the string-like body 10 as shown in the figure, within the capacity of the container.

This invention has such a configuration and has the following effects.

(1) The storage container can be attached and removed freely.

(2) It is possible to greatly reduce the time and effort required to pick up storage containers. With the conventional adhesive method, it was necessary to attach twice as many containers as the number of tubes and wait for the adhesive to harden (usually one day), resulting in thick and artificial tubes for on-site work.

With the method of this invention, the containers at both ends can be tied together and attached at the same time.

(3) The container is securely attached, improving reliability.

(4) By making the cleaning material hollow and passing it through the string-like body, it is possible to prevent the cleaning material from jumping out of the container and flowing into the piping.

(5) When a string-like body penetrating the inside of the tube is used in a coiled form, this string-like body disturbs the fluid inside the tube and can promote improvement in heat transfer.

[Brief Description of the Drawings] Fig. 1 is an explanatory diagram of a conventional device, Fig. 2 is a detailed explanatory diagram of the present invention, Fig. 3 (A) is a side sectional view of the mounting section,
Figure FB) is an end view of Figure 3 (A) viewed from the R direction;
FIG. 4(A) is a side sectional view of another embodiment, FIG. 4(B) is a view taken along the line A-A in FIG. 4(A), and FIG. 5(A) is a side sectional view of yet another embodiment. Figure 5 [B] is an end view of Figure 5 (A) seen from the R direction, Figure 6 is a side view of an embodiment in which the tension can be adjusted, and Figure 7 (A) is a lit cross section of another embodiment. figure,
Fig. 7(B) is an end view of Fig. 7(A) viewed from the R direction;
FIG. 8(A) is an end view of yet another embodiment; FIG. 8(B) is an end view of yet another embodiment;
) is a view taken along the line BB in FIG. 8(A), and FIG. 9 is a diagram showing an embodiment using a coil. Explanation of symbols 1-m-heat exchanger 2-1-tube 3--tube plate 4-m-water chamber 5-11 storage d? ;6---Cleaning materials
10--String-like body 11--Fixing plate 51.52.5
3--One hole 54-m-Groove 55--Protrusion 56-
--Mizoita's agent Patent attorney (8107) Kiyo Takashi Sasao (and 3 others) @ 1 Figure 2 Figure 3' \ Figure 3 Figure 4 Figure 5

Claims (4)

[Claims] (1) A device that cleans the inner wall of the tube by installing a container for tube cleaning material at both ends of the tube of a heat exchanger and moving the cleaning material back and forth within the tube using the pressing force of the internal fluid, which penetrates both ends of the tube. A heat exchanger tube cleaning device characterized in that a storage container is detachably attached to a tube plate by the tension of a string-like body. (2) A patented tube cleaning device for a heat exchanger, characterized in that the tube cleaning material is hollow, and the cleaning material +4 moves inside the tube through the string-like body. (3) The above-mentioned string-like body is provided with a tension adjusting device so that the tension can be adjusted at a portion where the string-like body is attached to the storage container. 2. The tube cleaning device for a heat exchanger according to item 1. (4) The tube cleaning device for a heat exchanger according to any one of the claims, characterized in that the string-like body is an elastic body.