JPS6221832Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Field of industrial application] This invention utilizes the change in magnetic force in response to temperature changes, which is one of the characteristics of permanent magnets, and utilizes the repulsion between the magnet and the ferromagnetic metal. This invention relates to a flow rate control valve that controls the flow rate based on changes in the flow rate.

This invention will be explained below with reference to the embodiment shown in FIG. In FIG. 1, reference numeral 1 denotes an upper flange whose inner wall surface is formed into a tapered portion 1a using a non-magnetic material. 2 is a lower flange which is tightened with the upper flange 1 through a packing 3 to seal it with the outside.
These upper flange 1 and lower flange 2 constitute a fluid flow path. 4 is a magnetic valve body made of a permanent magnet, and as shown in FIG. 2, the relationship between temperature and magnetic force is such that as the temperature rises, the magnetic force decreases. Reference numeral 5 denotes a spring whose upper end side is fixed by a support plate 8, and whose lower end side acts in a direction to constantly move the magnetic valve body 4 downward. Further, 6 is a ferromagnetic metal part, which is fixed to the lower flange 2 constituting a fluid flow path, the center of which is the fluid flow path through which the fluid 9 passes, and the magnetic valve body 4
A repulsive force due to magnetic force acts between the two. Further, a support plate 8 is inserted into the stepped portion of the inner wall within the upper flange 1, and the support plate 8 is provided with a plurality of through passages 8a. Furthermore, the guide rod 7 is caulked 7a in the center part.
It is formed integrally with the support plate 8. The guide rod 7 serves as a guide for sliding the through passage 4a at the center of the magnetic valve body 4, and allows the magnetic valve body 4 to move smoothly. Further, guide stops 7b and 7c are provided for regulating the vertical movement of the magnetic valve body 4.

Next, the operation will be explained.

If the fluid temperature is below the operating temperature of the flow control valve,
The repulsive force between the magnetic valve body 4 and the ferromagnetic metal portion 6 formed on the lower flange 2 is stronger than that of the spring 5, and the magnetic valve body 4 comes to the solid line position in the figure. In this case, the space between the upper flange 1 and the tapered part 1a is the narrowest,
It becomes closed. Therefore, the fluid 9 passes through the through passage 4a provided in the magnetic valve body 4.

As the fluid temperature increases, as shown in Figure 2,
The repulsive force between the magnetic valve body 4 and the ferromagnetic metal part 6 decreases, and at the same time the stroke of the spring 5 increases. Therefore, the magnetic valve element 4 moves in the direction of the position indicated by the dotted line, and the gap between the tapered part 1a of the upper flange 1 and the outer circumference of the magnetic valve element 4 widens, and the flow rate of the fluid 9 increases, and the fluid 9 moves in the direction indicated by the arrow. Pass like 9a. In this way, the fluid flow rate is controlled by the movement of the magnetic valve body 4 in response to changes in the fluid temperature.

According to the flow control valve as described above, the magnetic valve body 4
Using the repulsive force of the ferromagnetic metal part 6, the fluid passing flow rate can be varied at the tapered part 1a of the upper flange 1, and the fluid temperature can be kept constant.

As explained in detail above, this invention uses a magnetic valve body whose magnetic force changes in response to temperature changes to control the flow rate, so it has the advantage of being able to control the flow rate without applying external energy. be.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of this invention, and FIG. 2 is a characteristic diagram showing the relationship between the temperature and magnetic force of a magnetic valve body used in this invention. In the figure, 1 is the upper flange, 1a is the tapered part, 2
is the lower flange, 3 is the packing, 4 is the magnetic valve body,
4a is a through flow path, 5 is a spring, 6 is a ferromagnetic metal part, 7 is a guide rod, 7a is a caulking, 7b, 7c
8 is a guide stopper, 8 is a support plate, and 9 is a fluid.

Claims (1)

[Claims for Utility Model Registration] (1) A ferromagnetic metal part having a passage through which a liquid passes is fixed in a fluid flow path, and a magnetic valve body made of a permanent magnet whose magnetic force changes with temperature changes is fixed in the fluid flow path. The ferromagnetic metal part is provided to face the ferromagnetic metal part in the fluid flow path, and to move in the length direction of the fluid flow path so that magnetic forces repel the ferromagnetic metal part and change the flow rate of the fluid flow path. Further, a spring is installed, one end of which is fixed to the wall surface of the fluid flow path, the other end of which engages with the magnetic valve element and presses the magnetic valve element against the magnetic force. Flow control valve. (2) The flow control valve according to claim (1) of the utility model registration claim, wherein the magnetic valve body is guided by inserting a guide rod into the flow path thereof, and the movable range is regulated. . (3) The flow control valve according to claim (1), wherein the moving portion of the magnetic valve body on the wall surface of the fluid flow path forms a tapered portion.