JP3573951B2 - Valve with opening indication - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a valve with an opening display, and more particularly, to a valve with an actuator used for controlling a cold / hot water pipe for air conditioning.
[0002]
[Prior art]
Conventionally, there are relatively many valves with an actuator that are not provided with an opening degree display used for controlling a cold / hot water pipe for air conditioning, and there is an inconvenience that it is not possible to recognize an opening / closing required at the time of a test run or maintenance.
In addition, this type of valve does not have enough space for thermal insulation coating, and insulation coating is often not provided or insufficient.In cold water piping, it is located below the valve to catch water that has condensed and dropped. I needed to put a drain tray.
FIG. 4 is an external view showing a piping state of a conventional valve with an actuator for air conditioning, in which A is a heat insulation coating, and the distance between the valve B and the actuator C is short, and the vicinity of the actuator is close when cold water flows. Therefore, there was no space for mounting the opening display mechanism.
[0003]
[Problems to be solved by the invention]
The present invention has been developed in view of the above circumstances, and its object is to be able to recognize the opening and closing of a valve with an actuator used for controlling a cooling / heating water pipe for air conditioning, and to provide a heat insulation allowance for dew condensation countermeasures. Is to be able to wear it.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, a valve with an opening display of the present invention is configured as follows.
[0005]
An actuator is attached to the body of the elevating valve that opens and closes by opening and closing the stem via a resin connection tube with a display window and a length that allows thermal insulation coating. A resin-made elevating display member is movably fitted thereinto, the lower part of the elevating display member provided in the moving part of the actuator is connected to the upper end of the stem, and the identification is performed on the outer peripheral surface of the elevating display member. The up and down movement of the part is visually recognized from the display window of the connecting cylinder, and the opening and closing of the valve is recognized.
[0006]
In this case, a large number of display windows may be provided on the connection cylinder so that the connection cylinder can be viewed from multiple directions, or the connection cylinder may be connected to the body and the actuator by a screw structure at the upper and lower ends thereof. It is a cylindrical body whose outer peripheral surface is colored so that its elevation state can be visually recognized from the display window.
[0007]
It is extremely preferable that the elevating valve is a thermostatic valve and the actuator is a thermowax type.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
The valve is opened and closed by the raising and lowering of the stem, and at the same time, the raising and lowering display member connected to the stem is also raised and lowered. For this reason, the portion of the outer peripheral surface of the elevating display member, which can be seen from the display window of the connecting cylinder, changes with the opening and closing of the valve, so that the opening and closing of the valve can be visually recognized.
[0009]
By displaying the visible portion of the outer peripheral surface of the elevating display member from the display window at the raised position and the visible portion of the display window at the lowered position by applying an identification unit such as coloring, the display is performed. It is easy to recognize the opening / closing of the valve by visually observing the elevating state by looking at the outer peripheral surface of the elevating display member from the window, which is useful during test operation and maintenance.
[0010]
A large number of display windows may be provided in the circumferential direction of the outer peripheral surface of the connecting cylinder so as to be viewed from multiple directions, and the visibility can be further improved. For example, when the outer shape of the connecting cylinder is a hexagonal prism and display windows are provided on each of the six outer planes, the lifting state of the lifting display member can be visually recognized through the display windows facing from other directions, and the outer diameter is rotated. It is very convenient because it can be used as a tool holder.
[0011]
The connection between the connecting cylinder and the body and the connection between the connecting cylinder and the actuator are made by the screw structure at the upper and lower ends of the connecting cylinder. By rotating the connecting cylinder, the connection to and detachment from the body is extremely easy. And the attachment and detachment to and from the actuator are extremely simple, and maintenance and inspection in the piping state are easy.
[0012]
Since the connecting cylinder is provided between the body of the valve and the actuator, sufficient heat insulation coating can be applied to the body, and the connecting cylinder and the elevating display member are made of resin to completely prevent dew condensation. There is no need to place a drain pan below. In addition, since the length of the connecting cylinder can be appropriately changed and manufactured, in the valve for cold water, the valve for hot water is made longer by forming a heat insulating cover for completely preventing dew condensation as described above. Then, it is sufficient to make the length as short as necessary.
[0013]
In Europe, thermostatic valves equipped with thermowax actuators are often used to control air conditioning chilled and heated water pipes. The actuators use heat as a power source. This is a very useful valve because the valve does not change the sealing performance due to a change in temperature. However, the valve is not provided with an indication of the degree of opening and a sufficient heat retention for sufficient heat insulation coating.
Therefore, if this kind of valve is provided with the opening degree display mechanism of the present invention, it becomes much more useful.
[0014]
FIG. 3 is an external view showing a piping state of the valve with the opening indication according to the present invention. The valve and the actuator are separated from each other with a connecting cylinder interposed therebetween, and the heat insulation coating A can be sufficiently large. , No condensation.
[0015]
【Example】
FIG. 1 is a partially sectional front view showing an embodiment of a valve with an opening indication according to the present invention, and shows a state in which the valve is fully closed. FIG. 2 is a partially sectional front view showing a state where the valve shown in FIG. 1 is fully opened.
[0016]
1 and 2, reference numeral 1 denotes a valve with an opening display, 2 denotes a body, 3 denotes an actuator, 4 denotes a connecting cylinder, 5 denotes a stem, and 6 denotes an elevating display member. The disc 7 fixed to the upper and lower sides moves up and down, and the disc sheet 7a is attached to and detached from the valve seat 2a of the body 2 to open and close the valve 1.
[0017]
When the actuator 3 is operated from the state shown in FIG. 1 so that the elevating display member 6 can be lifted, the elevating force of the spring 8 causes the stem 5 via the spring receiver 9 and the elevating display member 6 connected to the stem 5 to move. The disc 7 at the lower end of the stem 5 is also raised to open the space between the disc seat 7a and the valve seat 2a, and the fully opened state shown in FIG.
The moving part (not shown) of the actuator 3 and the elevating display member 6 may be connected or may simply be in contact. In the present example, the latter case has been described. In the former case, however, the elevation display member 6 is pulled up by the actuator 3 and is assisted via the stem 5 by the elastic force of the spring 8.
[0018]
The connecting cylinder 4 has a hexagonal outer diameter, and an inner hole 4a has a cylindrical shape, and a column-shaped elevating display member 6 is fitted into the hole 4a so as to slide substantially.
For example, red paint is applied to the outer peripheral portion 6a and white paint is applied to the outer peripheral portion 6b, and a display window 4b provided on each of the six outer surfaces of the connecting cylinder 4 is provided on the outer peripheral surface of the elevating display member 6. In the fully closed state shown in FIG. 1, the red color of the outer peripheral portion 6a is visually recognized, and in the fully opened state shown in FIG. 2, the white color of the outer peripheral portion 6b is visually recognized.
[0019]
The upper and lower ends 4c and 4d of the connecting cylinder 4 have a screw structure, and a nut 4e engaged with a lower engaging portion 3a of the actuator 3 is screwed to a threaded portion of the upper end 4c. It is screw-connected to the screw portion 2b of the body 2.
In the figure, reference numeral 10 denotes a gland packing.
[0020]
Next, the operation will be described based on the embodiment shown in FIGS.
By the operation of the actuator 3 and the action of the corresponding spring 8, the stem 5 and the disc 7 move up and down to open and close the valve 1. At the same time, the elevating display member 6 also moves up and down, and the outer peripheral surfaces 6a and 6b of the elevating display member 6 visible from the display window 4b turn white or red. That is, the color seen in the display window 4b turns white or red at the same time when the valve 1 opens and closes, indicating the open / closed state of the valve.
Thereby, the open / closed state of the valve 1 can be recognized, which is extremely useful at the time of test operation and maintenance.
[0021]
Since the display window 4b is provided on any of the six outer planes of the hexagonal prism-shaped connecting cylinder 4, the elevation display member 6 that can be visually recognized from the facing display window 4b from any direction around the bulb 1. The open / closed state of the valve 1 can be recognized by the coloring of.
The hexagonal prism of the connecting cylinder 4 is very convenient because the outer diameter can be used for a tool for rotation for connection of the connecting cylinder 4 described below.
[0022]
The connection between the connecting cylinder 4 and the body 2 and the connection between the connecting cylinder 4 and the actuator 3 are made by the screw structure of the upper and lower ends 4c and 4d of the connecting cylinder 4. Therefore, by rotating the connecting cylinder 4, The connection with the body 2 can be very easily attached and detached, and the attachment and detachment with the actuator is extremely simple, so that maintenance and inspection in the state of the piping are easy.
[0023]
Since the connecting cylinder 4 is provided between the body 2 of the valve 1 and the actuator 3, the body 2 can be sufficiently covered with heat and the condensation can be completely eliminated by making the connecting cylinder and the elevating / lowering display member made of resin. And the need for placing a drain receiver under the valve 1 is eliminated. In addition, since the length of the connecting cylinder 4 can be appropriately changed and manufactured, the valve for cold water is made long so that the heat insulating coating for completely preventing dew condensation can be formed as described above, and the valve for hot water is used. The valve may be of the shortest required length.
[0024]
【The invention's effect】
As described above, the valve with the opening indication of the present invention can recognize the opening and closing of the valve, so it is extremely useful at the time of test operation and maintenance, and even when used for cold water piping, it sufficiently covers the temperature. Since there is no condensation and there is no need to place a drain receiver under the valve, the actuator and the connecting cylinder can be easily attached and detached in a piping state, and maintenance and inspection are easy.
Also, it is possible to display the opening and closing of the valve from the display window of the connecting cylinder detachably provided between the valve and the actuator without providing the valve opening degree display on the actuator, which is particularly useful during test operation and maintenance. In addition, even if the connecting cylinder is covered with heat, the indication of the opening can be visually recognized, and the connecting cylinder is detachable between the valve and the actuator. Work is easy, and furthermore, since the elevating display member and the connecting cylinder are made of resin, in the case of a cold water valve, dew condensation can be reliably prevented, and a valve capable of sufficiently covering the body with heat can be provided. .
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional front view showing an embodiment of an opening indicating valve according to the present invention, showing a state in which the valve is fully closed.
FIG. 2 is a partial cross-sectional front view showing a fully opened state of the valve with the opening display shown in FIG. 1;
FIG. 3 is an external view showing a piping state of the valve with the opening display of the present invention.
FIG. 4 is an external view showing a piping state of a conventional valve with an actuator for air conditioning.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Valve with opening display 2 Body 3 Actuator 4 Connecting cylinder 4b Display window 5 Stem 6 Elevation display member

Claims (5)

An actuator is attached to the body of the elevating valve that opens and closes by opening and closing the stem via a resin connection tube with a display window and a length that allows thermal insulation coating. A resin-made elevating display member is movably fitted thereinto, the lower part of the elevating display member provided in the moving part of the actuator is connected to the upper end of the stem, and the identification is performed on the outer peripheral surface of the elevating display member. A valve with an opening indication, wherein the opening / closing of the valve is recognized by visually checking the ascending and descending movement of the part from a display window of the connecting cylinder . The valve with an opening indication according to claim 1, wherein a number of display windows are provided in the connecting cylinder. The valve with an opening indication according to claim 1 or 2, wherein the connecting cylinder is connected to the body and the actuator by upper and lower thread structures. The opening according to any one of claims 1 to 3, wherein the elevating display member is a cylindrical body whose outer peripheral surface is colored so that its elevating state can be visually recognized from the display window. Valve with display. The valve with the opening indication according to any one of claims 1 to 4, wherein the elevation valve is a thermostatic valve, and the actuator is a thermowax type.

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