JP4460323B2 - Temperature-responsive valve - Google Patents

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 the valve chamber and the outlet is provided between the valve chamber and the outlet, and an adjustment rod having a valve shaft fitting hole is provided as a valve. The valve shaft is provided with a valve body that is screwed to the casing and opens and closes the valve port on one end side. The other end side of the valve shaft is displaceably fitted in the valve shaft fitting hole. The valve shaft is displaced in the axial direction by the deformation action of the temperature sensing member, and the valve port is opened and closed by the valve body, and the valve shaft is connected to the adjusting rod so as to rotate as the adjusting rod rotates. The foreign material is scraped off by rotating the valve body by the rotation of the valve shaft by the adjusting rod.

The conventional temperature responsive valve is configured to scrape off foreign matter by rotating the valve body by the rotation of the valve shaft by the adjusting rod. That is, the foreign matter is deleted from the adjustment rod side, and the foreign matter cannot be scraped off from the valve seat member side.
JP 2002-372166 A

  The problem to be solved is to be able to scrape off foreign matter from the valve seat member side.

The present invention provides a valve casing in which an inlet, a valve chamber, and an outlet are formed, a valve port that communicates the valve chamber and the outlet is provided between the valve chamber and the outlet, and a valve body that opens and closes the valve port is provided on one end side. The shaft is placed in the valve chamber, a temperature-sensitive member is arranged around the valve shaft, the valve shaft is displaced in the axial direction by the deformation action of the temperature-sensitive member, and the valve port is opened and closed by the valve body. An adjusting rod having a joint hole is screwed to the valve casing, and the other end of the valve shaft is displaceably fitted in the valve shaft fitting hole and arranged so as to rotate as the adjusting rod rotates. Is connected to an adjustment rod, and a valve opening is formed in a valve seat member that is screw-coupled to the valve casing so as to be attachable / detachable and advanceable / retractable from below .

  According to the present invention, foreign matters can be scraped off with certainty, so that an excellent effect is obtained that the discharge flow rate is not reduced and the valve opening is not clogged.

In the temperature responsive valve of the present invention, an adjusting rod having a valve shaft fitting hole is screwed to the valve casing, and the other end side of the valve shaft is movably fitted in the valve shaft fitting hole. The valve shaft is connected to the adjusting rod so as to rotate with the rotation of the valve, and the valve seat is formed in the valve seat member that is screw-coupled to the valve casing so as to be attachable / detachable and advanceable / retractable from below. By rotating the member, foreign matter adhering to the valve opening can be scraped off by the valve body. Further, foreign matters that cannot be scraped off by the valve body can be surely scraped off by removing the valve seat member from the valve casing and cleaning it.

  An embodiment showing a specific example of the above technical means will be described (see FIG. 1). A lid 4 is screwed to a 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 valve body fitting hole 7, the valve port 8, the communication hole 30, and the through hole 9. The valve body fitting hole 7, the valve opening 8, and the communication hole 30 are formed in the valve seat member 10 that is screwed to the main body 3 through an O-ring 31 so as to be attachable / detachable and advance / retreat from the outside. The valve port 8 is formed to have a smaller diameter than the valve body fitting hole 7. 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 opposite to the valve port 8. A conical valve body 13 for opening and closing the valve port 8 is integrally provided at the lower end of the valve shaft 12. A blade 15 having a two-surface width that is movably fitted in the valve body fitting hole 7 is integrally provided above the valve body 13 of the valve shaft 12. The blade 15 having a two-sided width allows the fluid in the valve chamber 5 to pass to the valve port 8 side, and removes foreign matter adhering to the back wall 14 of the valve body fitting hole 7 where the valve port 8 opens at the lower end. The valve port 8 is short so that foreign matter is not easily deposited, and is formed to have a length of about 1 mm from the sealing surface with the valve body 13, for example.

  The upper end of the valve shaft 12 is movably fitted in a valve shaft fitting hole 18 of an adjustment rod 17 screwed to the lid 4 via an airtight O-ring 16 so as to be able to advance and retract. The valve body fitting hole 7, the valve port 8, and the valve shaft fitting hole 18 are formed on the same shaft. An upper portion of the adjustment rod 17 protrudes from the lid 4, and a slit 19 is provided on the upper end surface of the adjustment rod 17 so that the tip of a tool such as a screwdriver fits. A lock nut 20 is attached to the protruding portion of the adjusting rod 17 to prevent loosening, and is covered with a cap 21. The adjusting rod 17 has a vertical cut 22, and a connecting rod 23 that penetrates and is fixed to the upper part of the valve shaft 12 is fitted into the cut. As a result, the valve shaft 12 rotates as the adjustment rod 17 rotates. In order to rotate the valve shaft 12 in accordance with the rotation of the adjusting rod 17 without using the slit 22 and the connecting rod 23, the peripheral wall section of the valve shaft fitting hole 18 is formed into a non-true circle such as a polygon or an ellipse. The section of the valve shaft 12 that is fitted into the valve shaft fitting hole 18 may be formed into a non-circular shape such as a polygon or an ellipse. A spring receiver 24 is fixed to the central portion of the valve shaft 12, an intermediate member 25 having a substantially U-shaped cross section and a flange on the outer side of the upper end, and a spring receiver 24, which is displaceable to the valve shaft 12. Is brought into contact with the lower end surface of the mating member. Around the valve shaft 12, a bimetal laminate 26 and a flat washer 27 are disposed as a temperature sensitive member between the lower end surface of the adjusting rod 17 and the flange portion of the intermediate member 25. The bimetal laminate 26 is a pair of two bimetal disks combined with different bending directions, and a plurality of the bimetal disks are stacked. Between the upper end surface of the spring receiver 24 and the lower end surface of the flat washer 27, a valve body urging spring 28 that urges the spring receiver 24 toward the valve port 8 is disposed. A return spring 29 is disposed between the flange of the intermediate member 25 and the bottom wall of the valve chamber 5.

  The fluid enters the valve chamber 5 from the inlet 1 through the through hole 6, flows around the bimetal laminate 26, passes from the valve body fitting hole 7, the valve port 8 and the communication hole 30 to the outlet 2 through the through hole 9. leak. When the temperature of the surrounding fluid rises and the bimetal laminate 26 is heated to a high temperature, each bimetal disk is bent and the degree thereof increases, and the return spring 29 is compressed via the plain washer 27 and the intermediate member 25. While extending in the stacking direction. Along with this, the intermediate member 25 and the valve shaft 12 are displaced in the direction of the valve port 8, the opening degree of the valve port 8 gradually decreases, and the valve body 13 closes the valve port 8 at the end. When the higher temperature fluid flows into the valve chamber 5 after the valve body 13 closes the valve port 8, the bimetal laminate 26 further expands while compressing the return spring 29 and the valve body biasing spring 28. At this time, the intermediate member 25 is displaced in the direction of the valve port 8, but the valve shaft 12 is not displaced. If the temperature of the fluid in the valve chamber 5 decreases, the bending force of the bimetal laminate 26 decreases and is pushed back by the return spring 29 via the intermediate member 25. Along with this, the intermediate member 25 and the valve shaft 12 are displaced in a direction away 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.

  When the temperature of the fluid to be discharged is changed, the cap 21 is removed and the adjusting rod 17 is rotated. If the adjusting rod 17 is screwed in, the temperature of the fluid to be discharged becomes low, and if the adjusting rod 17 is screwed up, the temperature of the fluid to be discharged becomes high. Further, by rotating the valve seat member 10, the foreign matter adhering to the back wall 14 of the valve body fitting hole 7 in which the valve port 8 opens at the lower end of the blade 15 provided on the valve shaft 12 is scraped off, and the valve body 13. To scrape off foreign matter adhering to the valve port 8. Further, foreign matters that cannot be scraped off by the valve body 13 are scraped off by removing the valve seat member 10 from the main body 3 and cleaning it.

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 7 Valve body fitting hole 8 Valve port 10 Valve seat member 12 Valve body 13 Valve body 14 Back wall 15 of valve body fitting hole 15 Cutting tool 17 Adjustment rod 18 Valve shaft fitting hole 22 Cutting 23 Connecting rod 26 Bimetal laminate

Claims (1)

The valve casing forms an inlet, a valve chamber, and an outlet. A valve shaft that provides communication between the valve chamber and the outlet is provided between the valve chamber and the outlet, and a valve shaft that opens and closes the valve port is provided on one end side. In the case where a temperature sensing member is arranged around the valve shaft, the valve shaft is displaced in the axial direction by the deformation action of the temperature sensing member, and the valve port is opened and closed by the valve body. The adjusting rod is screwed to the valve casing, and the other end of the valve shaft is slidably fitted into the valve shaft fitting hole, and the valve shaft is adjusted to rotate as the adjusting rod rotates. A temperature responsive valve, characterized in that a valve opening is formed in a valve seat member that is connected and screwed to a valve casing so as to be attachable / detachable and advanceable / retractable from below .

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