JP2005257042A - Temperature response valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To scrape off foreign matters adhered to a valve port from a valve seat member side. <P>SOLUTION: A valve casing with a valve chest 5 therein is formed by threading a cover 4 to a body 3 having an inlet 1 and an outlet 2. A spherical valve seat member 10 having a valve port 8 communicating the valve chest 5 with the outlet 2 is installed between the valve chest 5 and the outlet 2. A valve stem 12 having a valve element 13 opening and closing the valve port 8 at one end is disposed in the valve chest 5. A bimetal laminated body 26 as a temperature sensing member is disposed around the valve stem 12, and an operating shaft 34 rotating the spherical valve seat member 10 about the valve stem 12 is connected to the spherical valve seat member 10 so as to scrape off foreign matters adhered to the valve port 8 by the valve element 13 by rotating the spherical valve seat member 10 by the operating shaft 34. <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 is formed with a valve seat member in which an inlet, a valve chamber, and an outlet are formed in a valve casing, and a valve port that communicates the valve chamber and the outlet is provided between the valve chamber and the outlet. An adjustment rod having a valve is screwed to the valve casing, and the other end side of the valve shaft provided with a valve body that opens and closes the valve port on one end side is displaceably fitted in the valve shaft fitting hole. A temperature sensing member is arranged around the valve shaft, and the valve shaft is displaced in the axial direction by the deformation action of the temperature sensing member to open and close the valve port with the valve body. Is connected to the adjusting rod, and the valve body is rotated by the rotation of the valve shaft by the adjusting rod to scrape off foreign matter.

The above conventional temperature responsive valve rotates the valve body by the rotation of the valve shaft by the adjusting rod to scrape off foreign matter. That is, the foreign matter is scraped off 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.

  In the present invention, an inlet, a valve chamber, and an outlet are formed by a valve casing, a valve seat member that opens a valve port that communicates the valve chamber and the outlet is provided between the valve chamber and the outlet, and the valve port is opened and closed on one end side. A valve shaft provided with a valve body is arranged in the valve chamber, a temperature-sensitive member is arranged around the valve shaft, 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. The valve seat member is formed in a spherical shape, the operation shaft that rotates the valve seat member around the valve shaft is connected to the valve seat member, and the foreign matter attached to the valve port by the rotation of the valve seat member by the operation shaft is valved. It is characterized by scraping with the body.

  According to the present invention, the foreign matter adhering to the valve opening can be scraped off by the valve body by the rotation of the valve seat member by the operation shaft, and 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, the valve seat member is formed in a spherical shape, an operation shaft that rotates the valve seat member around the valve shaft is connected to the valve seat member, and the valve seat is rotated by the rotation of the valve seat member by the operation shaft. The attached foreign matter is scraped off by the valve body, and the foreign matter can be scraped off from the valve seat member side.

  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 through the outlet passage 30 and from the bypass passage 31 through the outlet passage 30. The bypass passage 31 may connect the inlet 1 and the outlet passage 30. The spherical valve seat member 10 is disposed at the junction of the valve body fitting hole 7, the outlet passage 30 and the bypass passage 31. A straight bypass hole 32 that communicates the bypass passage 31 and the outlet passage 30 with the spherical valve seat member 10, an outlet hole 33 that opens laterally from the center of the bypass hole 32, and a right angle from the center of the bypass hole 32. A valve port 8 opened upward is formed. 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 arranged 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 two-sided width portion 15 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 two-surface width portion 15 allows the fluid in the valve chamber 5 to pass to the valve port 8 side. An operation shaft 34 that rotates the spherical valve seat member 10 about the valve shaft 12 passes through the main body 3 and is connected to the spherical valve seat member 10. The valve shaft 12 and the operation shaft 34 are formed on the same axis. The illustrated state shows a state in which the bypass passage 31 and the outlet passage 30 communicate with each other through the bypass hole 32 and the outlet hole 33 is blocked. When the operation shaft 34 is rotated from this state and the spherical valve seat member 10 is rotated 90 degrees, the bypass passage 31 is blocked and the outlet hole 33 is in communication with the outlet passage 30.

  The upper end side of the valve shaft 12 is displaceably 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 retreat. The valve body fitting hole 7, the valve port 8, and the valve shaft fitting hole 18 are formed on the same shaft. The upper portion of the adjustment rod 17 protrudes from the lid 4, and a cut 19 is provided on the upper end surface of which 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 adjustment 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. Thereby, the valve shaft 12 rotates with the rotation of the adjusting rod 17. 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 in a non-round shape such as a polygon or an ellipse. The section of the valve shaft 12 that fits 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 that 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 bimetal discs that are combined by changing the bending direction, and a plurality of the bimetal discs 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.

  Normally, the spherical valve seat member 10 is used in a state where the bypass passage 31 is blocked and the outlet hole 33 communicates with the outlet passage 30. 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 outlet hole 33 to the outlet 2 through the outlet passage 30. 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, when scraping off the foreign matter adhering to the valve port 8, the spherical valve seat member 10 brings the bypass passage 31 and the outlet passage 30 into communication through the bypass hole 32 and the outlet hole 33 is blocked. Since the temperature of the fluid in the valve chamber 5 rises, the valve body 13 closes the valve port 8. In this state, by rotating the operating shaft 34 and rotating the spherical valve seat member 10, foreign matter adhering to the valve port 8 is scraped off by the valve body 13.

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 Spherical valve seat member 12 Valve shaft 13 Valve body 17 Adjustment rod 18 Valve shaft fitting hole 22 Split 23 Connecting rod 26 Bimetal laminated body 30 Exit passage 31 Bypass passage 32 Bypass hole 33 Exit hole

Claims (1)

The valve casing forms an inlet, a valve chamber, and an outlet, a valve seat member that opens a valve port that connects 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 valve shaft is disposed in the valve chamber, a temperature sensing member is disposed 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 seat member is formed in a spherical shape, the operation shaft that rotates the valve seat member around the valve shaft is connected to the valve seat member, and the foreign material attached to the valve port is scraped off by the valve body by the rotation of the valve seat member by the operation shaft A temperature responsive valve characterized by that.

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