JP4838023B2 - Temperature indicator - Google Patents

Description

  The present invention relates to a temperature indicator that is attached to an object to be measured such as a pipe for steam or hot water, a valve or a device for controlling these high-temperature fluids, and displays the temperature of the object to be measured. Knowing the temperature of piping, valves, and equipment of high-temperature fluid not only helps prevent burns, but also knows the operating state of the valve and the operating state of the equipment. For example, in the case of a steam trap that automatically discharges condensate without escaping steam from the steam piping system, the steam is normal at a medium temperature if it is within a predetermined temperature range, but if it is higher than the predetermined temperature range, It can be inferred that there is a leaking high temperature abnormality, and if the temperature is lower than the predetermined temperature range, it can be inferred that the drainage is insufficient or cannot be drained.

  A conventional temperature indicator includes a case attached to an object to be measured, a temperature responsive member accommodated in the case and contracted or expanded due to a temperature change of the object to be measured, and a temperature responsive member attached to the temperature responsive member. A movable member that is displaced in the axial direction of the case, and a display unit that is attached to the movable member and protrudes outward or immerses inward from the case. One end of the temperature-responsive member is attached to the case. The end side is attached to the movable member.

The above-mentioned conventional temperature indicator has a problem that the display temperature cannot be adjusted because the display temperature when the display part protrudes outward or immerses inward with respect to the case is determined by the molding of the temperature-responsive member. was there.
JP-A-2005-300458

  The problem to be solved is to provide a temperature indicator that can adjust the display temperature when the display part protrudes outward or immerses inward with respect to the case.

The present invention includes a case attached to an object to be measured, a temperature responsive member accommodated in the case and contracted or expanded due to a temperature change of the object to be measured, and a case attached to the temperature responsive member by contraction or extension of the temperature responsive member. An adjustment member that includes a movable member that is displaced in the axial direction, and a display unit that is attached to the movable member and that projects outward or inwardly with respect to the case. The adjustment member has a fitting hole that guides the movable member in the axial direction of the case, and the movable member fits into the fitting hole of the adjustment member. characterized in that the direct mounting the other end to the adjusting member attached directly to the movable member.

In the present invention, an adjustment member that can be moved back and forth in the axial direction of the case is screwed to the case, the adjustment member has a fitting hole that guides the movable member in the axial direction of the case, and the movable member is adjusted. fitted into the fitting hole of the member, because the direct mounting other end to one end of the temperature responsive member in the adjusting member in which is mounted directly to the movable member, the axial direction of the case by operating the adjusting member from outside By moving the screw back and forth, an excellent effect is obtained in that the display temperature can be adjusted when the display portion protrudes outward or immerses inward with respect to the case.

In the present invention, an adjustment member that can be moved back and forth in the axial direction of the case is screwed to the case, the adjustment member has a fitting hole that guides the movable member in the axial direction of the case, and the movable member is adjusted. fitted into the fitting hole of the member, in which the direct mounting other end to one end of the temperature responsive member in the adjusting member attached directly to the movable member. Therefore, when the adjusting member is operated from the outside and screwed back and forth in the axial direction of the case, the temperature-responsive member attached to the adjusting member moves in the axial direction of the case, and the temperature-responsive member is moved along with the movement of the temperature-responsive member. The movable member attached to the member moves in the axial direction of the case, and as the movable member moves, the display unit attached to the movable member moves in the axial direction of the case, and the display unit is removed from the case. The displayed temperature changes when projecting inward or immersing inward. Therefore, it is possible to adjust the display temperature at which the display unit protrudes outward or immerses inward with respect to the case.

  An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 and 2). The case 2 of the temperature indicator 1 is formed of a left main body 3 and a right main body 4 each having an outer shape of a substantially quadrangular prism and an inner shape, and the right end of the left main body 3 is press-fitted into the left end of the right main body 4. Fix it. The left main body 3 and the right main body 4 are made of aluminum having a high thermal conductivity. Each of the left main body 3 and the right main body 4 may be formed in a polygonal shape such as a substantially triangular shape or a hexagonal shape, or in a cylindrical shape.

The left main body 3 integrally includes a partition wall 6 having a through hole 5 in the center. An adjustment member 7 that can be advanced and retracted in the axial direction of the case 2 is screwed to the right main body 4. The adjustment member 7 has a fitting hole 8 in the center. A movable member 9 that penetrates the through hole 5 and fits into the fitting hole 8 is disposed in the case 2. The movable member 9 is guided in the through hole 5 and the fitting hole 8 and is displaced in the axial direction of the case 2. One end (right end) side of the temperature responsive member 10 made of bimetal is welded directly to one end (left end) side of the adjustment member 7. The other end (left end) side of the temperature responsive member 10 is welded and attached directly to the substantially central portion of the movable member 9. A display portion 11 having a U-shaped cross section is attached to one end (left end) side of the movable member 9 with a set screw 12. A stopper member 13 that abuts against the partition wall 6 and restricts displacement is attached to the movable member 9. A slit 14 is provided on the other end (right end) side of the adjustment member 7 so that the tip of a tool such as a screwdriver can be fitted.

  The bimetal is obtained by firmly bonding two kinds of metals or alloys having different thermal expansion coefficients into a plate shape, and bends in response to a temperature change. A spiral winding made by spirally winding a strip-shaped bimetal flat plate is spirally wound again to form a double spiral winding. In the first spiral shape, the inside is made of a low expansion material and the outside is made of a high expansion material. In the case of this helically wound shape, the radius becomes smaller and the length becomes longer when the temperature is high, and the opposite action occurs when the temperature is low. And in the case of the double helix formed using this, the radius becomes smaller and the length becomes longer when the temperature becomes high, and the opposite action is exerted when the temperature becomes low.

  The temperature indicator 1 is attached to, for example, an adhesive tape 16 on the outer surface of a bimetal steam trap 15 as an object to be measured. The temperature responsive member 10 contracts to displace the movable member 9 when the temperature of the bimetallic steam trap 15 decreases, and expands to displace the movable member 9 to the left when the temperature of the bimetallic steam trap 15 increases. . When the bimetal steam trap 15 operates normally and, for example, condensate below a set temperature of about 65 ° C. to about 75 ° C. is automatically discharged, the display unit 11 is immersed in the case 2. Thereby, it can confirm that it is normal. When the bimetallic steam trap 15 leaks condensate or steam at a set temperature or higher and reaches a predetermined high temperature, for example, 80 ° C. or higher, the temperature responsive member 10 expands and the movable member 9 is displaced leftward, and the display unit 11 Projects from the case 2. Thereby, the high temperature abnormality which has leaked the condensate or steam more than preset temperature can be confirmed. If the adjustment member 7 is operated from the outside and screwed in the axial direction of the case 2 to advance, the display temperature when the display unit 11 protrudes outward or immerses inward from the case 2 can be lowered. On the contrary, if the adjusting member 7 is moved backward, the display temperature can be increased.

Sectional drawing of the temperature indicator of the Example of this invention. The front view which shows the state which attached the temperature indicator of the Example of this invention to the bimetal type steam trap.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Temperature indicator 2 Case 3 Left main body 4 Right main body 5 Through-hole 6 Bulkhead 7 Adjustment member 8 Fitting hole 9 Movable member 10 Temperature response member 11 Display part 15 Bimetal type steam trap

Claims (1)

A case attached to the object to be measured, a temperature responsive member housed in the case and contracted or expanded due to a temperature change of the object to be measured, and a case attached to the temperature responsive member in the axial direction of the case by the contraction or expansion of the temperature responsive member Screws an adjustment member that can be moved back and forth in the axial direction of the case with a movable member that displaces and a display unit that is attached to the movable member and protrudes outward from or intrudes into the case. The adjustment member has a fitting hole for guiding the movable member in the axial direction of the case in the center, the movable member is fitted into the fitting hole of the adjustment member, and one end side of the temperature-responsive member is used as the adjustment member. temperature indicator, characterized in that the direct mounting other end attached directly to the movable member.

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