JP2005201355A - Temperature-responsive valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature-responsive valve with a valve port to be opened/closed by a valve element, the valve port being free from foreign matter deposition. <P>SOLUTION: A cover 4 is screw-joined to a body 3 having an inlet 1 and an outlet 2 to form a valve casing with a valve chest 5 inside. The valve port 8 is provided between the valve chest 5 and the outlet 2 for communicating the valve chest 5 with the outlet 2, a valve stem 12 is arranged passing through the valve port 8, the valve element 13 is integrally provided on the valve stem 12 for opening/closing the valve port 8 at its side of the outlet 2, a bimetal laminate 16 as a temperature sensitive member is arranged around the valve stem 12 in the valve chest 5, a connection part 14 is provided on the valve element 13, and a rotating member 17 connectable/disconnectable to/from the connection part 14 of the valve element 13 is screw-joined to the body 3. The valve element 13 is rotated with the rotation of the adjusting rod 17 to rake off foreign matters deposited on the valve port 8. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a temperature-responsive valve that opens and closes a valve opening by a temperature-sensitive member that is heated and cooled by a controlled fluid and deforms according to the temperature. The temperature responsive valve of the present invention is used when discharging a fluid at or below a predetermined temperature out of the system or mixing a plurality of fluids into a fluid at a predetermined temperature. It is suitable when used as a temperature control trap that is discharged automatically.

  A conventional temperature responsive valve has an inlet, a valve chamber, and an outlet formed by a valve casing, a valve port that communicates between the valve chamber and the outlet is provided between the valve chamber and the outlet, and a valve shaft is disposed through the valve port. The valve body that opens and closes the valve port from the outlet side is provided integrally with the valve shaft, a temperature sensitive member is arranged around the valve shaft in the valve chamber, and the valve shaft is displaced in the axial direction by the deformation action of the temperature sensitive member. The valve opening is opened and closed by a valve body.

In the above conventional temperature responsive valve, when foreign matter such as dust or scale in the fluid adheres to the sealing surface of the valve port that opens and closes when the valve element is seated, the valve body is in the fully closed position where the valve port is completely sealed. There was a problem that the valve could not be displaced and foreign matter gradually accumulated on the valve opening, and the valve opening was gradually narrowed to reduce the discharge flow rate, and the valve opening was clogged.
Japanese Examined Patent Publication No. 61-12159

  The problem to be solved is to provide a temperature responsive valve in which foreign matter does not accumulate in the valve port.

  In the present invention, an inlet, a valve chamber, and an outlet are formed by a valve casing, a valve port that communicates between the valve chamber and the outlet is provided between the valve chamber and the outlet, a valve shaft is disposed through the valve port, A valve body that opens and closes from the outlet side is provided integrally with the valve shaft, a temperature sensing member is disposed around the valve shaft in the valve chamber, and the valve shaft is displaced in the axial direction by the deformation action of the temperature sensing member. In a temperature-responsive valve that opens and closes the valve port, a connecting part is provided on the opposite side of the valve port of the valve body, and a rotating member that can be connected to and released from the connecting part of the valve body is screwed to the valve casing to rotate the rotating member. The foreign matter adhering to the valve opening is scraped off by the valve body by rotating the valve body.

  The present invention is excellent in that the foreign matter adhering to the valve port is scraped off by the valve body so that the foreign matter does not accumulate on the valve port that is opened and closed by the valve body, so that the discharge flow rate is not reduced and the valve port is not clogged. Produces a positive effect.

  In the temperature responsive valve of the present invention, a connecting portion is provided on the opposite side of the valve port of the valve body, a rotating member that can be connected to and released from the connecting portion of the valve body is screwed to the valve casing, and the valve is rotated by the rotation of the rotating member. The valve body is used to scrape off foreign matter adhering to the valve opening by rotating the body. In other words, by rotating the rotating member to rotate the valve body, foreign matter adhering to the valve port is scraped off by the valve body. For this reason, foreign matter does not accumulate on the valve opening that is opened and closed by the valve body.

  An embodiment showing a specific example of the above technical means will be described (see FIG. 1). A lid 4 is fastened to a main body 3 having an inlet 1 and an outlet 2 to form a valve casing having a valve chamber 5 therein. The inlet 1 communicates with the valve chamber 5 through the through hole 6, and the outlet 2 communicates with the through hole 7, the valve port 8, and the through hole 9. The through hole 7 and the valve port 8 are formed in a valve seat member 10 screwed to the main body 3. A screen 11 for restricting the flow direction of the fluid flowing from the inlet 1 into the valve chamber 5 and capturing foreign substances in the fluid is disposed. A valve shaft 12 is disposed through the valve port 8. A conical valve body 13 for integrally opening and closing the valve port 8 from the outlet 2 side is integrally provided at the lower end of the valve shaft 12. A connecting portion 14 made of a male screw is provided at the lower end of the valve body 13.

  Around the valve shaft 12 in the valve chamber 5, a bimetal laminate 16 as a temperature sensitive member is disposed between the lower end surface of the washer 15 screwed to the upper portion of the valve stem 12 and the upper end surface of the valve seat member 10. The bimetallic laminate 16 is a pair of bimetal discs that are combined by changing the bending direction, and a plurality of bimetal discs are stacked. The rotary member 17 is screwed to the lower end of the main body 3 so as to be able to advance and retract through an O-ring 18 so as to face the valve body 13. A connecting portion 19 made of a female screw that can be connected to and released from the connecting portion 14 of the valve body 13 is provided at the upper end of the rotating member 17 on the valve body 13 side. The connecting portion 14 of the valve body 13 may be provided with a female screw, and the connecting portion 19 of the rotating member 17 may be provided with a male screw. Further, a protrusion is provided on one of the connecting portion 14 of the valve body 13 and the connecting portion 19 of the rotating member 17, and an elastic member connected to this protrusion is provided on the other of the connecting portion 14 of the valve body 13 and the connecting portion 19 of the rotating member 17. It may be provided and connected.

  The fluid enters the valve chamber 5 from the inlet 1 through the through hole 6, flows around the bimetal laminate 16, and flows out from the through hole 7 and the valve port 8 through the through hole 9 to the outlet 2. When the temperature of the surrounding fluid rises and the bimetal laminate 16 is heated to a high temperature, each bimetal disk is bent and the degree of the increase is increased in the lamination direction. Along with this, the valve shaft 12 is displaced upward, the valve body 13 gradually approaches the valve port 8, the opening degree of the valve port 8 is reduced, and the valve body 13 closes the valve port 8 at the end. If the temperature of the fluid in the valve chamber 5 is lowered, the bimetallic laminate 16 has a small bending force and contracts in the lamination direction. Along with this, the valve shaft 12 is displaced downward, the valve element 13 is separated from the valve port 8, the valve port 8 is opened, and the fluid in the valve chamber 5 is discharged to the outlet 2.

  The rotating member 17 is screwed to connect the connecting portion 19 to the connecting portion 14 of the valve body 13, and the valve body 13 is rotated while the rotating member 17 is screwed into the main body 1, thereby scraping off the foreign matter adhering to the valve port 8. . If the screw connection between the rotating member 17 and the main body 3 is released when the rotating member 17 is screwed in more than a predetermined amount, the valve element 13 is pressed by the rotating member 17 in the direction of the valve port 8 with a large force. And the foreign matter adhering to the valve port 8 can be scraped off reliably.

Sectional drawing of the temperature responsive valve of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inlet 2 Outlet 3 Main body 4 Lid 5 Valve chamber 8 Valve port 10 Valve seat member 12 Valve shaft 13 Valve body 14 Connection part 16 Bimetal laminated body 17 Rotating member 19 Connection part

Claims (1)

The valve casing forms an inlet, a valve chamber, and an outlet. A valve port that communicates the valve chamber and the outlet is provided between the valve chamber and the outlet. A valve shaft is disposed through the valve port. A valve body that opens and closes is integrated with the valve shaft, a temperature-sensitive member is arranged around the valve shaft in the valve chamber, and the valve shaft is displaced in the axial direction by the deformation action of the temperature-sensitive member to open and close the valve port with the valve body In this case, a connecting part is provided on the opposite side to the valve port of the valve body, a rotating member that can be connected to and released from the connecting part of the valve body is screwed to the valve casing, and the valve body is rotated by rotation of the rotating member. A temperature-responsive valve characterized in that foreign matter adhering to the valve mouth is scraped off by the valve body.

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