JP2018044569A - Diaphragm type switch valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure-sensitive switch valve capable of automatically switching a flow of steam supplied to a snow melting roof panel.SOLUTION: A diaphragm type switch valve 10 includes a freely rotatable direction control valve 20 on a steam intake port side, and on a steam discharge port side, a steam pressure adjusting valve 30 freely movable in a vertical direction while allowing a part of the steam to pass, a diaphragm member 40 reversed by a steam pressure of the steam other than the part of the steam and energized to a direction in which reverse rotation is inhibited by an elastic body, and a connecting member 50 moved in compliance with the reverse motion of the diaphragm member 40. The diaphragm type switch valve 10 further includes a wire member 60 for cooperatively operating the connecting member 50 on the steam intake port side and the direction control member 20 on the steam discharge port side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a diaphragm type switching valve for attaching to a water vapor inlet side and a water vapor outlet side of a roof panel with a snow melting function. Furthermore, the flow of water vapor supplied to the roof panel assembly with a snow melting function operates automatically from the reversal caused by the diaphragm member receiving a pressure above a certain level without laying complicated piping, and automatically The present invention relates to a diaphragm type switching valve capable of switching the flow path.

  In the snowy country in winter, there are problems that a lot of labor (and dangerous work) is spent on the work of snow falling on the roof, and that there is a shortage of labor necessary for snow removal. It was. In order to solve the above-mentioned problem, the applicants let the water vapor pass through the roof, and the heat of the water vapor is conducted to the roof itself, so that the snow that has accumulated on the roof can be solved and the roof panel with a snow melting function. (Patent Document 1).

  In the roof panel with snow melting function developed by the applicants, in the situation where the temperature in winter falls below zero (often minus 20 ° C), it is inside the snow melting roof panel or the pipe connecting the snow melting roof panels. Since the water generated by the cooling of the water vapor remained, the snow melting roof panel and the piping were broken due to equal freezing, and therefore, it had to be particularly avoided. As a mechanism for that purpose, that is, as a mechanism for draining water so as not to collect water inside the snow melting roof panel and inside the piping, a draining pipe as a bypass function as shown in FIG. 7 was installed. . This drainage pipe prevents the water vapor from remaining inside the snowmelt roof panel after it has been liquefied.

JP 2012-041809 A

  In the roof panel assembly with the snow melting function, the snow melting is piped so as to be performed from the upper side of the snow melting roof panel assembly toward the lower side of the snow melting roof panel in consideration of thermal energy efficiency and the like (Fig. 8). The snow melting is completed from the upper side of the snow melting roof panel assembly to the lower side in order. If it does so, in the upper side of a snowmelt roof panel aggregate | assembly, even if the snowmelt has already been completed, it will continue supplying water vapor | steam further.

  Such a situation not only slows the snow melting speed of the entire roof panel assembly with a snow melting function but also dissipates heat from the snow melting roof panel installed on the upper side, resulting in wasted heat energy. In order to avoid such a situation, review the piping for water vapor supply itself and install it for each row, and install a three-way valve (a valve with a fluid inlet / outlet in three directions) to switch the water vapor passage. Complicated piping (see Fig. 8), which requires a lot of piping members, and is labor intensive, piping work is troublesome, and is troublesome in terms of maintenance. Met.

  In light of this situation, the applicant actively uses the drain pipes installed on the snow-melting roof panels that have already melted to prevent moisture from remaining inside the snow-melting panels, thereby actively using them as the water vapor flow path. It is now possible to avoid the water vapor from passing through the snow melting roof panel. That is, in the roof panel assembly with a snow melting function, water vapor is not supplied to the snow melting roof panel where the upper side of the snow melting is completed, and water vapor is supplied to the lower snow melting roof panel where the snow melting is not completed. Invented. In short, the changeover valve for changing the flow path of the water vapor passing through the snow melting panel where the snow melting is completed to allow the water vapor to pass through the draining pipe has been invented.

  The object of the present invention is to operate the starting point of the movement of the diaphragm member receiving a pressure above a certain level and reversing without laying complicated pipes for the water vapor flow path to supply the roof panel assembly with snow melting function, An object of the present invention is to provide a diaphragm type switching valve capable of automatically switching the flow path of water vapor.

  In order to solve the above-mentioned problem, the invention described in claim 1 is a diaphragm type switching valve installed on a water vapor inlet side and a water vapor outlet side of a roof panel with a snow melting function, the water vapor inlet side Is provided with a turnable direction control member, and on the water vapor outlet side, an elastic body is urged upward by an elastic body, and a steam pressure adjusting valve installed so as to be movable up and down, and an elastic body. A diaphragm member urged in a direction to prevent reversal; and a connecting member that moves in conjunction with the reversing movement of the diaphragm member; and further, the interlock member on the water vapor inlet side and the water vapor outlet side It is a diaphragm type switching valve characterized by including a wire member that interlocks the direction control member. In addition, in this specification, a diaphragm means a diaphragm and is a regulating valve that operates by air pressure (especially vapor pressure). As a material constituting the diaphragm, rubber, resin, metal, or the like is used.

  The invention described in claim 2 is the invention described in claim 1, wherein the pipe on the water vapor outlet side includes a portion in which the diameter of the pipe is narrowed down, and the water vapor supply to the diaphragm member is as follows: From the water vapor supply port on the roof panel side installed above the part where the diameter of the pipe is squeezed, and from the water vapor supply port on the drain pipe side installed below the part where the diameter of the pipe is squeezed It is a diaphragm type switching valve in which a check valve is installed at the water vapor inlet on the roof panel side.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the vapor pressure adjusting valve has a plurality of through holes and has a tapered shape near the tip. A diaphragm type switching valve having a diameter smaller than the diameter of the pipe (that is, a gap is formed between the pipe and the steam pressure adjusting valve). It is characterized by being.

  According to the invention of the present application, the snow melting roof panel that has completed the melting of the snow is actively connected to the water drain pipe that was originally installed so as to prevent moisture from remaining in the snow melting panel to prevent freezing. By utilizing as (by-pass), it is possible to prevent the water vapor from passing through the snow melting roof panel in which the water vapor flow path is automatically switched and the snow melting is completed.

  That is, in the roof panel assembly with a snow melting function, the snow melting on the snow melting roof panel on which the upper side of the roof has been completed is not supplied with water vapor by passing the water vapor supplied to the roof panel through the drain pipe, thereby completing the snow melting. Invented a mechanism to supply water vapor to the snowmelt roof panel under the roof that has not been done. In short, it has become possible to provide a switching valve for changing the flow of water vapor passing through the snow melting panel where snow melting has been completed and allowing water vapor to pass through the drainage pipe. As a result, in the roof panel assembly with a snow melting function, water vapor is not supplied to the snow melting roof panel where the snow melting on the upper side of the roof is completed, and water vapor can be supplied to the snow melting roof panel on the lower side of the roof where the snow melting is not completed. It became so.

It is a whole side view of the diaphragm type switching valve concerning this example. It is the side view and bottom view of a vapor pressure regulating valve. It is a figure for demonstrating the installation state of a vapor pressure regulating valve. It is a figure for demonstrating the state from the time of the start of snow melting of a diaphragm type switching valve to just before completion of snow melting. It is a figure for demonstrating the state at the time of the completion of snow melting of a diaphragm type switching valve. It is the schematic for demonstrating the water vapor | steam supply state accompanying a snow-melting condition. It is the whole back surface perspective view showing the drain piping in the roof panel with a snow melting function. (Note: Snow melting roof panels are turned over). It is the schematic for demonstrating piping of the roof panel aggregate | assembly with a snow melting function.

<Structure of diaphragm type switching valve>
Hereinafter, an embodiment of a diaphragm type switching valve 10 according to the present invention will be described in detail with reference to FIGS. FIG. 1 is an overall side view (partially enlarged view) of a diaphragm type switching valve 10 according to the present embodiment. In order to make it easy to explain the flow of water vapor in the roof panel body with a snow melting function, arrows a to f are shown.

  The diaphragm type switching valve 10 according to the present embodiment is a two-stage structure in which, in the roof panel assembly with a snow melting function, water vapor is not supplied to the snow melting roof panel in which the uppermost (upper) snow melting is completed, and the snow melting is not yet completed. A diaphragm type switching valve 10 installed on the water vapor inlet side and the water vapor outlet side of the roof panel with a snow melting function for supplying water vapor to the snow melting roof panel of the third, third, ... (lower side). is there.

  As shown in FIG. 1, the diaphragm type switching valve 10 according to the present invention has a rotatable directional control member 20 on the water vapor inlet side, and a roof panel with a snow melting function on the water vapor outlet side. In the pipe installed at the water vapor outlet from the main body, while allowing water vapor to pass, the vapor pressure regulating valve 30 is urged by a helical spring or the like from the lower direction to the upper direction and is movably installed in the vertical direction; A diaphragm member 40 that is biased in a direction to prevent reversal by a helical spring and reverses by the vapor pressure of water vapor supplied from the direction of arrow c and the direction of arrow f (see FIG. 5), and reversal of the diaphragm member 40 And a direction control member 20 installed on the water vapor intake side and a connection member 50 on the water vapor intake side. And a wire member 60 for interlocking.

  The pipe on the water vapor outlet side (the pipe in the nearest part for supplying water vapor to the diaphragm member 40) includes a portion 70 in which the diameter of the pipe is reduced, and the diameter of the pipe is reduced in the water supply to the diaphragm member 40. From the water vapor supply port 80 on the side of the snow melting roof panel installed above the portion 70 and from the water vapor supply port 90 on the side of the drainage pipe installed below the portion 70 where the diameter of the pipe is narrowed. The check valve 100 is installed in the water vapor intake port on the snow melting roof panel side.

  FIG. 2 is a side view and a bottom view of the vapor pressure regulating valve 30 according to the present embodiment. As shown in FIG. 2, the vapor pressure adjusting valve 30 has a conical shape near the tip (the inclination angle (taper) until the pipe is squeezed toward the part 70 where the diameter of the pipe is squeezed). And a rod for receiving spring force from the elastic body from the substantially center of the lower portion of the substantially cylindrical solid body, and further in the axial direction (rod Four through holes are drilled in a direction parallel to the extending direction (see the bottom view of FIG. 2).

  FIG. 3 is a view for explaining an installation state of the vapor pressure regulating valve 30 according to the present embodiment. The pipe on the water vapor outlet side (the pipe in the nearest part for supplying water vapor to the diaphragm member 40) includes a portion 70 in which the diameter of the pipe is narrowed down. As shown in FIG. It is installed so as to be vertically movable below the portion 70 where the diameter of the pipe is narrowed down. The diameter of the vapor pressure adjusting valve 30 (the diameter of the portion that is not conical (tapered)) is formed smaller than the diameter of the pipe (that is, a gap between the pipe and the vapor pressure adjusting valve 30). Furthermore, it is urged from the downward direction to the upward direction by an elastic body such as a helical spring.

<Operating state of diaphragm type switching valve according to snow melting>
FIG. 4 is a diagram for explaining a state of the diaphragm type switching valve 10 according to the present embodiment from the start of snow melting (in one roof panel) to immediately before the completion of snow melting, and FIG. 5 is a diagram of the diaphragm type switching valve 10. It is a figure (and one part enlarged view) for demonstrating the state at the time of completion of snow melting (in one roof panel).

  From the start of snow melting to just before the completion of snow melting, as shown in FIG. 4, the vapor pressure supplied from the water vapor supply port 80 on the side of the snow melting roof panel installed above the portion 70 where the diameter of the pipe is narrowed is Since it is weak, the diaphragm member 40 is pushed to the vapor pressure regulating valve 30 side (left side in FIG. 4) by the elastic force of the helical spring. The direction control member 20 that is installed on the water vapor intake side of the roof panel with a snow melting function and controls the flow direction (flow path) of the water vapor sent from the steam boiler is in a position to close the water drain piping. It is in a state where water vapor cannot flow into. The water vapor sent from the steam boiler flows as shown by an arrow a in FIG. 4 and flows into the snow melting roof panel to be used for a snow melting operation for melting the snow on the roof panel.

  The water vapor (arrow b) sent to the water vapor outlet side is partially transferred through the four through holes formed in the vapor pressure adjusting valve 30 that are installed on the water vapor outlet side so as to be movable in the vertical direction. To pass through. A part of the water vapor (arrow c) is supplied to the diaphragm member 40 through the water supply port 80 on the roof panel side installed on the upper side of the portion 70 where the diameter of the pipe is narrowed down.

  The steam pressure adjusting valve 30 is pushed (from the downward direction to the upward direction) by the elastic force of the helical spring urged from the drainage pipe side. From the start of snow melting to just before the completion of snow melting, the snow on the roof panel remains, that is, since the snow melting is not completed, the water vapor itself performs the work of snow melting. Since a part of the water vapor sent from the steam boiler is reliquefied, the overall vapor pressure is not so high. That is, since the vapor pressure of the water vapor flowing toward the diaphragm member 40 at this time is smaller than the elastic force of the helical spring, the diaphragm member 40 does not reverse as a result. In addition, since the check valve 100 is installed in the water vapor intake port on the roof panel side, the vapor pressure does not flow back from this and leaks.

  However, there is no snow left on the roof panel, that is, the melting of the water vapor has been completed and the vapor pressure of the water vapor has increased (the work of snow melting has been completed, and the water vapor sent from the vapor boiler is reliquefied. 5, the vapor pressure is high as a whole.) As shown in FIG. 5, as shown in FIG. 5, the vapor pressure adjusting valve 30 is pushed down, and (high pressure) water vapor is reduced in the diameter of the pipe 70. High-pressure water vapor is supplied from the water vapor supply port 80 on the roof panel side installed on the upper side. At the same time, the steam pressure adjusting valve 30 is pushed down to close the steam supply port 90 on the drain pipe side installed below the part 70 where the diameter of the pipe is narrowed down, so that the diameter of the pipe is narrowed down It becomes difficult for water vapor to be discharged from the water vapor supply port 90 on the side of the drainage pipe installed below 70, and the vapor pressure tends to increase.

  The vapor pressure of the water vapor flowing from the water vapor supply port 80 on the roof panel side installed on the upper side of the portion 70 where the diameter of the pipe is narrowed toward the diaphragm member 40 is a helical spring that biases the diaphragm member 40. Since it becomes larger than the elastic force, the diaphragm member 40 is inverted as a result. When the diaphragm member 40 is reversed, the connecting member 50 that moves in conjunction with the reversing movement of the diaphragm member 40 rotates, and the wire that interlocks the interlocking member 50 on the water vapor inlet side and the direction control member 20 on the water vapor outlet side. When the member 60 rotates the direction control member 20, the drainage pipe side opens, and the water vapor can flow into the drainage pipe. That is, water vapor flows in the direction of the arrow in FIG.

  Here, the steam pressure adjusting valve 30 will be described in detail. The diameter of the steam pressure adjusting valve 30 (the portion that is not conical (tapered)) is larger than the diameter of the pipe. It is formed small, that is, a gap is formed between the pipe and the steam pressure adjusting valve 30, and is further biased upward from the draining pipe side by the elastic body. There is a feature that. Part of water vapor passes through the inside and the surroundings of the vapor pressure adjusting valve 30 through the four through holes provided in the vapor pressure adjusting valve 30 and the gap between the outer diameter and the pipe, and is applied to the diaphragm member 40. The vapor pressure is adjusted. By this fine adjustment, when the melting of the snow is surely completed, a vapor pressure exceeding the elastic force of the helical spring is applied to the diaphragm member 40. As a result, the work of changing the flow path of the water vapor is performed.

  After the direction control member 20 on the water vapor outlet side is rotated and the drain pipe side is opened to allow the water vapor to flow into the drain pipe, the water vapor is not supplied to the inside of the snow melting roof panel. However, if the supply from the water vapor supply port 80 on the roof panel side, which is installed above the portion 70 where the diameter of the pipe is narrowed, does not continue, the diaphragm member 40 loses the elastic force of the helical spring and returns to the original position. In order to prevent such a phenomenon, in the present invention, in the present invention, the water vapor supply port 90 on the drain pipe side installed below the portion 70 where the diameter of the pipe is narrowed down. (Arrow f) supplying water vapor (at this time, the vapor pressure adjusting valve 30 is pushed by the vapor pressure (arrow e) from below and the elastic force of the helical spring, and is shown in the enlarged view of FIG. To return to the position Cement,) it is, there is a feature of the present invention where that prevents the diaphragm member 40 maintains a vapor pressure near the diaphragm member 40 will return to the original position (the position described in FIG. 4).

<Snow melting and water vapor supply due to the installation of a diaphragm type switching valve>
FIG. 6 is a schematic diagram for explaining a water vapor supply state associated with a snow melting situation. Fig. 6 (a) is a diagram showing a state in which there is snow on all the snow melting roof panels. Fig. 6 (b) shows that the uppermost snow melting roof panel has completed snow melting and is laid below it. FIG. 6C is a diagram showing a state where snow is accumulated on the snow melting roof panel, and FIG. 6C shows that the snow melting roof panels in the uppermost stage and the second stage have completed melting, and are laid on the lower side. It is a figure showing the state in which the snow-melting roof panel has accumulated snow.

  As described in FIG. 6A, when there is snow on all the snow melting roof panels, water vapor passes through all the snow melting roof panels. When the melting of the snow progresses and the melting of the uppermost snow-melting roof panel is completed, as shown in FIG. 6 (b), the water vapor pressure becomes larger than the biased elastic force applied to the diaphragm member. At the moment, the diaphragm type switching valve 10 is operated, the water vapor flow path to the roof panel side is closed, and the water vapor flows into the drain pipe. If it does so, it will be directly supplied to the snow melting roof panel of the 2nd step and after. That is, water vapor is directly supplied to the second and subsequent snow melting roof panels without passing through the uppermost snow melting roof panel. When the melting of the second stage snow melting roof panel is completed following the uppermost snow melting roof panel, similarly, the diaphragm type switching valve 10 passes through the uppermost snow melting roof panel and the second stage snow melting roof panel. Water vapor is supplied directly to the third and subsequent snow melting roof panels without having to.

<Effect of diaphragm type switching valve>
According to the present embodiment, the snow melting roof panel after the melting of the snow is positively connected to the water drain pipe (see FIG. 7) installed so as not to leave moisture inside the snow melting roof panel. As a result, it is possible to automatically prevent water vapor from passing through the snow melting roof panel after the snow melting is completed.

  That is, in the roof panel assembly with a snow melting function, water vapor is not supplied to the snow melting roof panel in which the uppermost (upper) snow melting is completed, and the second, third,・ Developed a mechanism with a heat-sensitive switching valve 10 that supplies water vapor to the (lower) snow melting roof panel. In short, it is possible to provide the diaphragm type switching valve 10 for changing the flow of water vapor passing through the snow melting roof panel where the snow melting is completed and allowing the water vapor to pass through the drain pipe (see FIG. 7). It was. As a result, the melted snow was not supplied continuously at the uppermost stage (upper side) of the snowmelt roof panel assembly even though the snowmelt was already completed. That is, while maintaining the snow melting speed of the roof panel assembly with the snow melting function as a whole, the heat radiation from the snow melting roof panels installed at the top, second, third, etc. is zeroed, and the heat energy is reduced. It can be used effectively only for this purpose.

<Example of changing diaphragm type switching valve>
The configuration of the diaphragm type switching valve according to the present invention is not limited to the aspect of each of the embodiments described above. The direction control member, the steam pressure adjusting valve, the diaphragm member, the connecting member, the wire member, and the diameter of the pipe are set. The configuration of the narrowed portion, the water vapor supply port on the roof panel side, the water vapor supply port on the drainage pipe side, the check valve, and the like can be appropriately changed as necessary without departing from the spirit of the present invention.

  Since the diaphragm type switching valve according to the present invention has excellent effects as described above, the diaphragm type switching valve is preferably used in the field of the switching valve that can effectively use heat energy for melting snow in the snow melting roof panel. Can do.

10. ・ Diaphragm type switching valve 20. ・ Direction control member 30 ・ ・ Vapor pressure adjustment valve 40 ・ ・ Diaphragm member 50 ・ ・ Connecting member 60 ・ ・ Wire member 70 ・ ・ Pipe diameter reduced part 80 ・ ・ Roof panel Steam supply port on the side 90 ... Steam supply port on the drain pipe side 100 ... Check valve

Claims (3)

A diaphragm type switching valve installed on the water vapor inlet side and the water vapor outlet side of the roof panel with snow melting function,
The water vapor inlet side is provided with a rotatable direction control member,
On the water vapor outlet side, a vapor pressure adjusting valve that is urged upward by an elastic body and is movably installed in the vertical direction,
A diaphragm member biased in a direction to prevent reversal by an elastic body;
A connecting member that moves in conjunction with the reversing movement of the diaphragm member;
The diaphragm type switching valve further comprising a wire member for interlocking the interlocking member on the steam inlet side and the direction control member on the steam outlet side. The pipe on the water vapor outlet side has a portion that narrows down the diameter of the pipe,
The water vapor supply to the diaphragm member was installed from the water vapor supply port on the roof panel side installed above the portion where the diameter of the pipe was narrowed, and below the portion where the diameter of the pipe was narrowed It can be done from the water vapor supply port on the drain pipe side,
The diaphragm type switching valve according to claim 1, wherein a check valve is installed at a water vapor inlet on the roof panel side.   The steam pressure adjusting valve is a solid body having a plurality of through holes and having a tapered shape near the tip, and the diameter of the steam pressure adjusting valve is smaller than the diameter of the pipe. The diaphragm type switching valve according to claim 1 or 2, characterized in that.

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