JP4738646B2 - Temperature-responsive valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
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.
[0002]
[Prior art]
The basic structure of a conventional temperature responsive valve is that a valve casing forms an inlet, a valve chamber, and an outlet, and a valve body fitting hole and a valve opening having a smaller diameter than the valve body fitting hole are provided between the valve chamber and the outlet. A valve shaft provided with a valve body that is provided with a valve shaft fitting hole in a valve casing or an adjustment rod that is screwed to the valve casing, one end of which is displaceably fitted in the valve body fitting hole and that opens and closes the valve port The other end of the valve is slidably fitted into the valve shaft fitting hole, 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. The body opens and closes the valve opening. An example of this is shown in Japanese Utility Model Publication No. 3-28225.
[0003]
[Problems to be solved by the invention]
In the above-mentioned temperature responsive valve of the prior art, foreign matter such as dust and scale in the fluid adheres and accumulates on the inner wall of the valve body fitting hole where the valve port opens, and the valve port is gradually narrowed to reduce the discharge flow rate. As a result, there was a problem that the valve mouth was clogged.
[0004]
Therefore, the technical problem of the present invention is to provide a temperature responsive valve capable of preventing the accumulation of foreign matter.
[0005]
[Means for Solving the Problems]
The technical means of the present invention taken in order to solve the above technical problem is that a valve casing forms an inlet, a valve chamber, and an outlet, and the valve body fitting hole and the valve body fitting are formed between the valve chamber and the outlet. A valve that has a valve opening with a smaller diameter than the joint hole, a valve shaft fitting hole in the adjustment rod screwed to the valve casing, and one end that is displaceably fitted in the valve body fitting hole, and opens and closes the valve opening at the tip The other end of the valve shaft provided with a body is slidably fitted in the valve shaft fitting hole, a temperature sensitive member is arranged around the valve shaft, and the valve shaft is pivoted by the deformation action of the temperature sensitive member. In the case of opening and closing the valve port with the valve body by displacing in the direction, the valve shaft rotates with the rotation of the adjusting rod so as to rotate when the valve shaft is displaced in the axial direction by the deformation action of the temperature sensing member directly connected to the valve shaft to regulatory rod as the temperature responsive valve, wherein the valve port is provided with a cutting tool to the site of the valve shaft facing the back wall of the valve body fitting hole which opens A.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is a valve shaft in deforming action of the temperature-sensitive member is directly linked to regulatory bar the valve shaft so as to rotate with the addition to the rotation of the valve shaft control rod to rotate when displaced in the axial direction Since the blade is provided at the valve shaft part facing the inner wall of the valve body fitting hole in which the valve port opens, the valve shaft is displaced in the axial direction while rotating by the deformation action of the temperature-sensitive member, When the valve body closes the valve port, foreign matter adhering to the inner wall of the valve body fitting hole in which the valve port opens can be removed with a blade provided on the valve rod.
[0007]
【Example】
An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 and 2). 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, and the through hole 9. The valve body fitting hole 7 and the valve port 8 are formed in the valve seat member 10 screwed to the main body 3. The valve port 8 is formed to have a smaller diameter than the valve body fitting hole 7.
[0008]
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.
[0009]
The upper end side of the valve shaft 12 is movably fitted in a valve shaft fitting hole 18 of an adjusting rod 17 screwed to the lid 4 via an 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 can be fitted. 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. As shown in FIG. 2, the adjustment rod 17 has a slit 22 bent in the vertical direction, and a connecting rod 23 that penetrates and is fixed to the upper portion of the valve shaft 12 is fitted into the slit 22. Thereby, the valve shaft 12 rotates when displaced in the axial direction. Further, the valve shaft 12 rotates as the adjustment rod 17 rotates.
[0010]
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.
[0011]
The fluid enters the valve chamber 5 from the inlet 1 through the through hole 6 and the screen 11, flows around the bimetal laminate 26, and flows out from the valve body fitting hole 7 and the valve port 8 through the through hole 9 to the outlet 2. To do. 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. Accordingly, the intermediate member 25 is displaced in the direction of the valve port 8 and the valve shaft 12 is displaced in the direction of the valve port 8 while rotating, so that the opening degree of the valve port 8 gradually decreases, and at the end, the valve body 13 is moved. Closes the valve opening 8. When the valve shaft 12 is rotated and displaced in the axial direction so that the valve body 13 closes the valve port 8, 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 rod 12. Remove foreign material attached to the back wall. 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.
[0012]
When changing the temperature of the fluid to be discharged, 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 screwing the adjusting rod 17 and rotating the valve shaft 12, foreign matter adhering to the inner 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 deleted. To do.
[0014]
【The invention's effect】
As described above, according to the present invention, the valve shaft is displaced in the axial direction while the valve shaft is rotated by the deformation action of the temperature-sensitive member, and the valve body opening hole opens when the valve body closes the valve mouth. Since the foreign matter adhering to the back wall can be removed with the blade provided on the valve stem, an excellent effect of reducing the discharge flow rate and preventing the clogging of the valve opening is produced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a temperature responsive valve of the present invention.
FIG. 2 is a side view of the adjusting rod of FIG.
[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 shaft 13 Valve body 14 Back wall 15 of the valve body fitting hole 15 Blade 17 Adjustment rod 18 Valve shaft fitting hole 22 Cutting 23 Connecting rod 26 Bimetal laminate

Claims (1)

Forming an inlet and the valve chamber and the outlet in the valve housing, the diameter of the valve port is provided than the valve body fitting hole and the valve body fitting Goana between the valve chamber and the outlet, the control rod which is screwed to the valve housing A valve shaft fitting hole is provided. One end of the valve shaft is displaceably fitted into the valve body fitting hole, and a valve body that opens and closes the valve port is provided at the tip. The other end of the valve shaft is displaceable into the valve shaft fitting hole. The 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 opening is opened and closed by the valve body. the valve body the valve axis deforming action is directly connected to the rod regulatory the valve shaft so as to rotate with the addition to the rotation of the valve shaft control rod to rotate when displaced in the axial direction, the valve port is opened A temperature responsive valve, characterized in that a blade is provided at a portion of the valve shaft facing the inner wall of the fitting hole.

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