JPS63159786A - Temperature-sensing operating element - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention has the functions of both a temperature sensor and an actuator for valley equipment, so that it is possible to adjust the angle of the louver according to the temperature in the ventilation duct, and to control the A body. The present invention relates to a temperature-sensitive actuating element used to automatically open/close AwJ etc. according to the temperature of a valve.

<Conventional Examples and Problems> This persimmon's temperature-sensitive actuating element is made of a so-called shape memory alloy, and a substance with a relatively low melting point such as wax or paraffin is sealed as an expansion/contraction material, and its solid-liquid change is prevented. There is one that utilizes tension for large volumes.

However, in the case of shape memory alloys, they are always solid and therefore easy to handle, but on the other hand, the operating force when changing shape is weak, so the range of application is extremely limited.

Therefore, when a stronger operating force is required, the latter type of temperature-sensitive actuating element sealed with expansion and contraction material is used, but if the ambient temperature rises abnormally, the pressure inside the sealed chamber will drop to the set value. Exceeding this could destroy the actuating rod and sealing structure.

Means for Solving the Problems> The present invention has been proposed to eliminate the above-mentioned drawbacks, and its purpose is to generate a stronger operating force by employing an expansion material sealed type. Another object of the present invention is to provide a temperature-sensitive actuating element that can absorb and adjust the internal pressure when the pressure inside the sealed chamber exceeds a set value, thereby preventing destruction of the operating loft and the sealed structure.

Another object of the present invention is to provide a temperature-sensitive operating element in which the internal pressure adjustment mechanism can also be used as a liquid leakage prevention mechanism.

Still another object of the present invention is to provide a temperature-sensitive operating element that can change the sealing pressure for preventing liquid leakage in response to increases and decreases in internal pressure.

Still another object of the present invention is to provide a temperature-sensitive actuating element that can be used for 800 mm without significantly changing the structure of the conventional sleeve temperature-sensitive actuating element.

The object of the present invention is to provide an outer casing having a hollow chamber, a temperature-sensitive chamber formed in a part of the hollow chamber, a temperature-sensitive expansion/contraction material filled in the chamber, and a temperature-sensitive expansion/contraction material filled in the chamber. An actuating rod, one end of which is arranged to be movable forward and backward in a 1 m room, and the other end of which protrudes from the outer casing, a guide member for supporting the actuating rod so that it can reciprocate in its axial direction; This is achieved by a temperature-sensitive actuating element consisting of an internal pressure adjusting member disposed at an appropriate location in a hollow chamber communicating with the greenhouse.

<Example> Next, the present invention will be explained in more detail according to an example shown in the drawings.

FIG. 1 shows an embodiment of the temperature-sensitive actuating element (1) after assembly. (2) is a metal outer casing having a tubular hollow chamber, one end of which has a filling port (3), and the other end of which an actuation rod (4) is reciprocatably attached. ing. (5) is a partition wall for dividing the hollow chamber and forming a sensitive chamber (6) on the filling port (3) side;
It is fixed in place in the hollow chamber and has one or more liquid passage holes (
5a). (7) is a sleeve type guide member for supporting and guiding the actuating rod (4) so as to be able to slide in the axial direction, and its inner end reaches the sensitive chamber (6), and the inner end of the actuating rod (4) Guide them so that they can move in and out of the sensitive room (6). (8) is an internal pressure adjusting member made of an elastic material, such as an elastic rubber material, and is loaded between the partition wall (5) and the step portion (7a) of the guide member.
) is provided so as to come into pressure contact with the sleeve portion of the hollow chamber and the inner wall of the hollow chamber. That is, the internal pressure adjusting member (8) also has a function as a sealing member for preventing liquid leakage. (8a)
(8b) is a concave groove formed on the right outer circumferential surface and inner circumferential surface of the internal pressure adjusting member (8) to ensure a space for allowing deformation and contraction. (8c) is a concave groove formed on the bottom peripheral surface of the partition wall, and is disposed so as to face the liquid passage hole (5a). (9) is the seal packing, (1
0) is an end member fitted and fixed to the open end of the outer casing (2), which supports and guides the rod (4) and fixes each member in the hollow chamber.

After the temperature-sensitive expansion/contraction material (not shown) is filled into the chamber (6) through the filling port (3), the bolts (11)
is screwed in and sealed.

As the expansion/contraction material, a material having a relatively low melting point and a high coefficient of body expansion, such as paraffin or wax, which changes into solid-liquid at room temperature or below and has an extremely high coefficient of body expansion upon liquefaction, is used.

When the ambient temperature of the temperature-sensitive actuating element (1) exceeds the melting point, the expansion/contraction material liquefies, and its volumetric expansion causes the actuation rod (
4) is pushed outward, and the pushing force is applied to the outer end of the rod (
4a), it is used as a biasing force to other equipment, and the stroke in the biasing direction stops when the actuating rod (4) (4b) reaches the end point of operation (the position shown in Figure 1). be.

However, if the outside temperature continues to rise, the expansion of the expansion/contraction material will not stop, and the internal pressure of the greenhouse (6) will become abnormally high, eventually causing the locking force on the end member (10) to become too high. Beyond, the operating loft (4), the guide member (7), the packing (
9), there may be a pressing force that pushes out internal mechanisms such as the partition wall (5) from the hollow chamber. In addition, the abnormal internal pressure may reach such a level that the internal liquid spills out over the seal portion.

However, the liquid expansion/contraction material in the sensitive chamber (6) at this time flows into the concave groove (8c) through the liquid passage hole (5a), and if excessive expansion occurs due to the above-mentioned abnormal high temperature, Due to the pressing force, the internal pressure adjusting member (8) is compressed and deformed to compensate for the space corresponding to the volume of the excessively expanded liquid.

Therefore, the internal pressure that would try to push the internal mechanism out of the hollow chamber is absorbed and no longer occurs.

Furthermore, as the abnormal internal pressure increases, the degree of compressive deformation of the internal pressure adjusting member (8) also increases, so the pressing forces between this and the inner wall of the hollow chamber, the right side, and the guide member (7) also increase in accordance with the degree of deformation. Therefore, the function of the liquid leakage prevention seal in the internal pressure adjusting member (8) can be automatically changed according to the magnitude of the internal pressure.

FIG. 2 shows another embodiment, in which the guide member (7) in FIG. 1 is omitted. The operating loft (4) is supported and guided by the rod insertion hole on the right side of the partition wall (5) and the end member (10), and the inner surface of the center hole of the internal pressure adjustment member (8) is connected to the operating rod (4).
By arranging the actuating rod (4) so as to directly contact it and act as a tightening force during the compressive deformation, liquid leakage from the sliding part of the actuating rod (4) is prevented in both normal and special cases and abnormal internal pressures. It was designed to do so.

Effects> According to the present invention, the above-mentioned objects can be well achieved, and mass production can be carried out at low cost with a simple configuration, so that the present invention has high industrial applicability.

[Brief explanation of the drawing]

FIG. 1 is a central vertical sectional view showing one embodiment of the present invention, and FIG. 2 is a central longitudinal sectional view showing another embodiment. (2) ---1 outer casing, (4) --- operating rod, (5) ----1 bulkhead, (6) ---1 sensing room, (7) --- guide member, (8 ) ----- Internal pressure adjustment member.

Claims (1)

[Claims] 1. An outer casing having a hollow chamber, a temperature-sensitive chamber formed in a part of the hollow chamber, a temperature-sensitive expansion/contraction material filled in the chamber, and the chamber. an actuating rod whose one end is arranged to be movable forward and backward, and whose other end is arranged to protrude from the outer casing; a guide member for supporting the actuating rod so that it can reciprocate in its axial direction; and the sensitive room. an internal pressure adjusting member disposed at a suitable location in a hollow chamber communicating with the temperature-sensitive actuating element; 2. The temperature-sensitive actuating element according to claim 1, wherein the expansion/contraction material is a substance having a relatively low melting point and a large coefficient of body expansion. 3. The temperature-sensitive actuating element according to claim 1, wherein the internal pressure adjusting member is disposed between the inner wall of the hollow chamber and the guide member to serve as a seal. 4. The temperature-sensitive operating element according to claim 1 or 3, wherein the internal pressure adjusting member is made of an elastic rubber material.