JPS6131899A - Shunt - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION In devices with a large number of pipes through which fluid circulates, such as heat exchangers and some types of boilers, the internal surfaces of the pipes are constantly cleaned to remove deposits that have built up on the pipe walls. There is a need to. To this end, conventionally a cylindrical brush is provided in the pipe, which is propelled by the fluid flow. After a predetermined period of time, the fluid is reversed and the brushes are propelled in the opposite direction to scrape the stuck deposits off the pipe wall.

Reverse flow of fluid is achieved by flow dividers, which reverse the direction of flow in each channel.

The present invention relates to such a flow divider. US Patent No. 397
No. 3,592 describes and describes a flow divider for insertion into the circuit of a heat exchanger to reverse fluid flow as required.

The complex structure of that type of diverter makes it expensive to manufacture and install, and it is very heavy, making it difficult to handle and transport. Moreover, a complicated support structure and a large space are required. Furthermore, since the fluid is forced to flow through the detour, the biggest problem is that the pressure loss within the flow divider is large. Moreover, leakage occurs at the seal.

The present invention aims to provide a flow divider to solve all of the above problems.

The flow divider of the present invention includes: (a) a cylindrical housing device covering one end; (b) an inlet connected to the main passage at the other end of the housing; (a) one side outlet port provided in the housing and connected to utility equipment; one side port communicating with the group of heat exchanger pipes under normal flow conditions; ;te> is provided in the housing so as to be movable in the axial direction between two operating positions each forming two flow passages; in one operating position, the two flow passages are connected to the inlet; one port and the other port and the outlet port, and in the other operating position, two flow channels provide the flow between the inlet and the second port and the first port and the outlet. A tubular valve member serving as a passage.

Preferably, the valve member is actuated by suitable means, such as pneumatic, hydraulic or electrical devices. These devices are preferably electronically controlled and typically include:
Run for 1/2 minute every 4-8 hours.

Next, the present invention will be explained with reference to the drawings.

The illustrated flow divider includes a cylindrical housing 1 . A cover 3 is fixed to the inside of one end of the housing 1, and an inlet 2 is provided passing through the cover 3. The cover is lined with an annular sealing member 4 having elasticity. Two ports 5 and 6 are provided spaced apart inside the housing. Port 5 communicates with one group of pipes of the heat exchanger, and port 6 communicates with another group of pipes of the heat exchanger. The housing is also provided with a lower side outlet for connection to utility equipment such as a cooling system. The valve member 8 is comprised of a cylindrical sleeve with both ends open. A diametrically extending bar 9 is secured to the inner wall of the sleeve, to which a stem or similar operating member 10 is attached by suitable means. The stem passes through the cover 11. cover 11
is fastened to the end of the housing remote from the inlet 2, and a sealing member 12 is provided between the housing and the cover 11. An O-ring 13 or similar member is provided as a seal between the cover and the operating member 10. The proximal end of the valve member 8 is provided with an outward flange 14 that supports an annular gasket 15 . The gasket 15 is held by an annular holding member 16 whose outer diameter is smaller than that of the gasket 15. Between port 5 and the lower exit,
An annular locking member 17 is attached to the inner surface of the housing. A similar locking member 18 is mounted inside the nousing between the port 6 and the exit lower. At its top, the sleeve 8 carries an annular flange 19, an annular gasket 20 and a retaining member 21 similar to the parts 14, 15, 16 described above. The axial distance between the locking member 17 and the seal 12 is equal to the distance between the locking member 18 and the seal 4.

The operating member extending through the cover 11 forms or is connected to a piston rod of a hydraulic or pneumatic cylinder 17 .

Conduits 18 and 19 are connected to the outlet and inlet of the cylinder 17. Since the cylinder 17 has a general structure, detailed description thereof will be omitted.

Assuming normal flow conditions are obtained at the position of valve member 8 shown in FIG. The water then returns to the No-Ujifugu 1, and from there flows around the member 8 to the exit lower.

If it is desired to reverse the flow through the pipes of the heat exchanger, the valve member 8 is lowered so that the bottom of the sleeve 8 is in the region of the 7 flange 14 by suitable means, such as a cylinder 17 actuating said operating member 10. It is locked to the seal 4,
The locking member 18 is locked to the gasket 20 (FIG. 2)
.

Then, the fluid entering from the main passage via the inlet 2 flows through the valve member 8, the port 6, the heat exchanger pipe, and then flows through the inlet port 5, from where it enters the valve member 8 in the housing 1. It flows around the area and flows into the exit loa.

The ports 5, 6 and the lower outlet may be provided on opposite sides in the diametrical direction, or may be provided at other suitable relative angular intervals. As is clear from the above, the above-described flow divider has an extremely simple structure and is lightweight. The support structure can also be very simple and the pressure loss of the fluid can be minimized.

The present invention is not limited to the specific structure of the flow divider described above. According to the present invention, it is also possible to employ a nozzle having a cross-sectional shape other than a cylindrical shape, and to make the valve member 8 have a cross-sectional shape other than a cylindrical shape. The inlet 2 can also be provided at any suitable location on the housing, for example on the side near the bottom. However, in that case, it is necessary to cover the bottom of the housing. In this case, pressure loss may increase, but depending on the application, this structure may be more suitable. The valve member is actuated at appropriate intervals, but its actuation may be controlled by computer control or other suitable manner. Instead of the locking members 17 and 18, the inner wall surface of the housing 1 is milled, and the sleeve 8 is provided with an annular flange or lip, and the flange or rib is tightly fitted to the inner wall surface. It can also constitute a seal.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a flow divider according to the invention in a normal flow condition, FIG. 2 is a similar cross-sectional view in a reverse flow condition, and FIG. 3 is a novel flow divider with a portion of the conventional casing cut away It is a perspective view of a container. Procedural amendment (voluntary) July 2, 1985

Claims (1)

[Claims] 1. (a) a cylindrical housing device with one end covered; (b)
(c) axially spaced inlets connected to the main passageway at the other end of the housing; two side ports communicating with a second group of flow conveying pipes; (d) one side outlet port provided in the housing and connected to utility use equipment; (e) each in said housing; It is provided to be movable in the axial direction between two operating positions forming two flow passages, and in one operating position, the two flow passages are connected to the inlet, one port, and the other port. a tubular valve member providing a flow path between the outlet port and, in the other operating position, two flow paths providing a flow path between the inlet and the second port and between the first port and the outlet; A flow divider characterized by being equipped with. 2. The flow divider according to claim 1, wherein the valve member is actuated by suitable pneumatic pressure, hydraulic pressure, or other suitable means. 3. The flow divider according to claim 2, wherein the actuating means is electronically controlled. 4. The flow divider according to claim 1, wherein the housing is cylindrical. 5. Two annular locking members are attached to the inner surface of the housing, one locking member being located between the first side port and the outlet port, and the other locking member being located between the second side port. 5. The flow divider according to claim 4, wherein the flow divider is located between the flow divider and the outlet port. 6. The flow divider according to claim 4, further comprising an annular flange or rib provided on the outside of the tubular valve member, which fits closely into the inner wall surface of the housing. 7. The flow divider according to claim 5, wherein the valve member is constituted by a cylinder having an annular outward flange supporting an annular seal member at its top and bottom ends. 8. The valve member is provided with an internal transverse bar for mounting an operating member, the operating member extending through the cover of the housing via a suitable gasket. The flow divider according to item 1.