JP6698247B2 - Switching valve - Google Patents

Description

  The present invention relates to a switching valve for switching the flowing direction of water vapor, which is installed by being connected to the water vapor discharge port side and the water vapor supply port 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 is automatically activated by activating the reversing motion caused by the diaphragm member receiving a certain pressure or more, without laying complicated piping. The present invention relates to a switching valve capable of switching the flow path of water vapor.

  In the winter, in snowy countries, there is a problem that a large amount of labor (also dangerous work) is spent for unloading snow that has accumulated on the roof, and there is a problem that the labor required for unloading is insufficient. It was In order to solve the above-mentioned problem, the applicants pass the steam through the inside of the roof, and the heat of the steam is conducted to the roof itself, so that the snow accumulated on the roof can be melted. Was developed (Patent Document 1).

  In the roof panel with snow melting function developed by the applicants, when the temperature in the winter is below zero (the temperature often becomes -20°C), the inside of the snow melting roof panel or the pipe connecting the snow melting roof panels is used. It must be especially avoided because the water generated by cooling the steam remains and the snow-melting roof panel and pipes are destroyed by the equal freezing. As a mechanism for that purpose, that is, as a mechanism for draining water so that water does not collect inside the snow melting roof panel and inside the pipe, a drainage pipe as a bypass function as shown in FIG. 7 was installed. .. This drainage pipe prevents the steam from remaining inside the snow melting roof panel after being reliquefied.

JP, 2012-041809, A

  In the roof panel assembly with a snow melting function, in consideration of thermal energy efficiency and the like, as shown in FIG. 6, from the upper side of the snow melting roof panel assembly to the lower snow melting roof panel installed in order (in FIG. (A)->(b)->(c) in this order) The pipes are arranged so that snow is melted (see FIG. 6). That is, the snow melting starts from the roof panel installed on the upper side of the snow melting roof panel assembly and is completed toward the roof panel installed on the lower side in order. Then, the roof panel installed on the upper side of the snow melting roof panel assembly will continue to supply steam even though the snow melting work has already been completed (see Flow).

  Such a situation not only slows down the snow melting speed of the entire roof panel assembly with a snow melting function, but also radiates heat from the snow melting roof panel installed on the upper side, resulting in a waste of heat energy. In order to avoid such a situation, a three-way valve (a valve having a fluid inlet/outlet in three directions) is installed to switch the steam passages by reviewing the piping itself for steam supply and piping in each row. However, complicated piping is required (see Fig. 8), a large number of piping members are required, and the construction cost is high. Also, the piping work is troublesome, and the maintenance is also troublesome. Met.

  Based on the current situation, the applicant should positively utilize the water drainage pipes installed in the snow melting roof panel where the snow melting has been completed so as not to leave water inside the snow melting panel, as a flow path for water vapor. With this, water vapor can be automatically prevented from passing inside the snow melting roof panel where the snow melting is completed. That is, in the roof panel aggregate with a snow melting function, steam is not supplied to the snow melting roof panel on which the snow melting on the upper side is completed, and a mechanism for supplying water vapor to the snow melting roof panel on the lower side where the snow melting is not completed is provided. developed. In short, we have developed a switching valve that changes the flow path of water vapor that passes through a snowmelt panel that has completed snowmelt so that the water vapor passes through the drainage pipe.

  An object of the present invention is to operate a flow path of steam supplied to a roof panel assembly with a snow melting function without laying a complicated pipe, starting from a movement in which a diaphragm member receives a pressure of a certain level or more and turns over, It is to provide a 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 switch for switching the flowing direction of water vapor, which is installed by being connected to the water vapor discharge side and the water vapor supply side of a roof panel with a snow melting function. In the valve, the water vapor discharge port side is urged by an elastic body in a direction to prevent reversing, and a diaphragm member provided with an extruding member near the center, and interlocking with the reversing movement of the diaphragm member. It is equipped with a connecting member that is installed to rotate,
The water vapor supply port side is provided with a rotatably mounted gear, and immediately before the completion of snow melting, the diaphragm member is urged by an elastic body in a direction to prevent reversal, thereby draining water. When the pipe is closed and the snow melt is completed, the diaphragm member is turned over to turn the steam from the steam supply port to the drain pipe, and the steam switching member turns to the drain pipe. A thermostat having a vertically moving pin is rotatably installed, and a tip end shape on one end side is a shape capable of meshing with the gear installed on the water vapor switching member, and the other end side is An intervening member is provided for fixing the rotation of the steam switching member so that the steam continues to flow in the drain pipe until the temperature around the thermostat joined to the pin of the thermostat decreases. The switching valve includes a wire member that connects the connecting member on the outlet side and the steam switching member on the steam supply port side.

  In this specification, the diaphragm means a diaphragm, and is a regulating valve that operates by air pressure (particularly vapor pressure). Rubber, resin, metal or the like is used as a material forming the diaphragm.

  According to the invention of the present application, the snow melting roof panel which has completed the snow melting is originally a water drainage pipe that was installed so as to prevent water from remaining inside the snow melting panel for the purpose of preventing freezing. By utilizing it as a (bypass), it becomes possible to prevent the passage of water vapor to the snow melting roof panel where the snow melting has been completed by automatically switching the water vapor flow path.

  That is, in the roof panel aggregate with a snow melting function, to the snow melting roof panel (on the upper side of the roof) where the snow melting is completed, the steam supplied to the snow melting roof panel is not supplied with the steam by passing through the drain pipe. We invented a mechanism to supply water vapor to the snow melting roof panel (under the roof) where snow melting has not been completed. In short, it has become possible to provide a switching valve for changing the flow of steam passing through a snow melting panel where snow melting has been completed so as to allow the steam to pass through a drainage pipe. As a result, in the roof panel assembly with a snow melting function, it is possible to supply steam to the snow melting roof panel which has not been melted, and to supply heat energy to the snow melting roof panel which has not been melted. Not only can it be used effectively, but it has also become possible to improve the speed of snow melting work.

It is the whole figure (partially enlarged view) for explaining the installation state in the snow melting panel of switching valve 10 concerning this example. It is a figure (i) for demonstrating the operation state accompanying the snow melting situation of the switching valve 10. It is a figure (ii) for demonstrating the operation state accompanying the snow melting situation of the switching valve 10. It is a figure (iii) for demonstrating the operation state accompanying the snow melting situation of the switching valve 10. It is a figure (iv) for demonstrating the operation state accompanying the snow melting situation of the switching valve 10. It is a schematic diagram for explaining a steam supply state accompanying a snowmelt situation. It is the whole back surface perspective view showing the drainage piping in the roof panel with a snow melting function. (Note: The snow melting roof panel is turned inside out). It is a schematic diagram for explaining piping in the case where the switching valve of the roof panel aggregate with a snow melting function is not used.

<Structure of switching valve>
Hereinafter, an embodiment of the switching valve 10 according to the present invention will be described in detail with reference to FIGS. 1 to 5. FIG. 1 is an overall view (partially enlarged view) for explaining an installation state of a switching valve 10 according to the present embodiment in a snow melting panel.

  The switching valve 10 according to the present invention is a roof panel assembly with a snow melting function (a system in which steam that has passed through the inside of the roof panel is circulated and reused, specifically, not only snow melting in the winter but also in summer such as a water heater. It is not a "circulation type" that also considers the use of snow, but the "non-circulation type" that is used only for snow melting in the winter when the inside of the roof panel simply passes water vapor and does not circulate)) No water vapor is supplied to the snow melting roof panel which has been completed, and the switching valve 10 for supplying water vapor to the snow melting roof panel of the second, third,... (lower) where the snow melting is not yet completed is there.

  As shown in FIG. 1, various members installed on the steam supply port side of the roof panel with a snow melting function of the switching valve 10 according to the present invention and various members installed on the steam discharge port side are connected by a wire member 80. It is the switching valve 10 to be installed. As described in the enlarged view of FIG. 1, the switching valve 10 according to the present embodiment is provided with a rod-shaped extruding member 30 near the center, which is biased by an elastic body in the direction of preventing reversal, on the steam outlet side. The diaphragm member 20 and the connecting member 40 installed so as to rotate in association with the reversing movement of the diaphragm member 20 (directly, the downward movement of the rod-shaped pushing member 30). .. The connecting member 40 has a V-shape (an angle of 70° to 90° with respect to the rotation axis as a reference center) about the rotation axis, and the tip on one end side of the V-shape is the diaphragm member 20. It is connected to the extruding member 30, and the tip of the V-shaped other end is connected to the wire member 80.

  On the water vapor supply port side, a water vapor switching member 50 rotatably installed, a thermostat 60, and an elastic member for an interposition member for fixing the rotational position of the water vapor switching member 50 that moves in conjunction with the movement of the thermostat 60. The interposition member 70 is urged downward by the body 90 (the direction in which it meshes with the gear set on the water vapor switching member 50 ). The connecting member 40 on the steam supply port side and the steam switching member 50 on the steam discharge port side are connected by a wire member 80. Although the interposition member 70 has a length on one end side longer than that on the other end side, the interposition member 70 has a “U” shape as a whole. As shown in FIG. 1, one end side (which is longer than the other end side) of the “U” shape is urged downward by the interposition member elastic body 90, and the other end side is the tip portion of the thermostat 60. It is installed to interlock with the vertical movement of the pin installed in.

  Next, the thermostat 60 will be described. The switching valve 10 according to the present embodiment includes a thermostat 60 and an intervening member 70 for fixing the rotational position of the steam switching member 50 that moves in conjunction with the movement of the thermostat 60. Generally, a thermostat is a device for adjusting the temperature, and a switch is repeatedly turned on and off so as to maintain a set temperature. In the present invention, the thermostat 60 is a device that reacts to the set temperature. It is defined to work. Specifically, in this embodiment, for example, when the set temperature is 50° C., when the sensor temperature of the thermostat 60 exceeds 50° C., the pin installed at the tip is pushed down to set the sensor temperature of the thermostat 60. Is set to push up the pin when the temperature drops below 50°C.

<Operating state according to the snow melting situation of the switching valve>
2 to 5 are diagrams (i) to (iv) for explaining the operating state of the switching valve 10 according to the present embodiment in accordance with the snow melting situation. The operating state of the switching valve 10 associated with the snow melting state will be described in chronological order (proceeding toward FIGS. 2 to 5). FIG. 2 is a diagram for explaining an operating state of the switching valve 10 according to the present embodiment from the start of snow melting of a specific snow melting roof panel to immediately before the completion of snow melting. FIG. 3 is a diagram for explaining an operating state of the switching valve 10 at the time of completion of snow melting of a specific snow melting roof panel. FIG. 4 is a diagram for explaining an operating state of the switching valve 10 when the snow melting of another snow melting roof panel continues in the snow melting roof panel assembly after the completion of the snow melting of the specific snow melting roof panel. FIG. 5: is a figure for demonstrating the state of the switching valve 10 when the snow melting in a snow melting panel roof aggregate is completed completely.

  As shown in FIG. 2, from the start of snow melting (in a specific snow melting roof panel) to immediately before the completion of snow melting, the diaphragm member 20 consumes the thermal energy of the steam passing through the inside of the snow melting roof panel for the work of snow melting. Since the temperature does not rise sufficiently, the steam pressure supplied from the steam supply port is weak even on the steam discharge side. Therefore, the diaphragm member 20 is in a state of being convex upward by the elastic force of the elastic body (the spiral spring). Therefore, since the water vapor switching member 50 is in a state in which the water drain pipe is closed (see the enlarged view of FIG. 2), the water vapor is supplied to the inside of the snow melting roof panel.

  As shown in FIG. 3, when the snow melting is completed (in a specific snow melting roof panel), the thermal energy of the steam is not spent on the work of snow melting, and the temperature rises sufficiently. For this reason, the diaphragm member 20 reverses to a downwardly convex state because the vapor pressure supplied from the steam supply port becomes high even on the side of the steam discharge port. The wire member 70 is pulled leftward by rotating the connecting member 40, which is installed so as to rotate in association with the reversing movement of the diaphragm member 20, to the left. When the wire member 70 is pulled leftward, the water vapor switching member 50 rotates counterclockwise, so that the water vapor passage on the roof panel side is blocked and the water vapor flows into the drain pipe that functions as a bypass. Like

  As shown in FIG. 4, in the situation where the snow melting of the other snow melting roof panel continues in the snow melting roof panel assembly after the completion of the snow melting of the specific snow melting roof panel, the steam is discharged to the drain pipe which functions as a bypass. Because of the flow, no steam will be supplied to the particular snowmelt roof panel that has completed snowmelt. In this state in which steam is not supplied to the steam discharge port side, the diaphragm member 20 installed on the steam discharge side is convex downward. That is, it remains in the inverted state.

An intervening member 70 that moves in conjunction with the movement of the thermostat 60 is provided on the steam supply port side. Since the steam flows through the drainage pipe that functions as a bypass, the temperature is high on the steam supply port side (near the thermostat 60), and the thermostat 60 is set to operate in the direction of pushing down the pin when the temperature rises. ing. Therefore, as shown in the enlarged view of FIG. 4, the tip of the interposition member 70 meshes with the gear set on the water vapor switching member 50. That is, since the push-down force of the thermostat 60 operating in the direction of pushing down the pin at the tip of the thermostat 60 and the interposition member 70 biased downward act in the same direction, they mesh with the gear set in the steam switching member 50. The water vapor switching member 50 does not rotate clockwise.

  In short, in the present invention, the interposition member 70 is installed so that the water vapor switching member 50 does not rotate in the clockwise direction, so that the rotational position of the water vapor switching member 50 is fixed. As a result, the water vapor will continue to flow to the bypass drainage pipe as before, without switching to the snow melting roof panel side. It can be said that the point of the present invention is to devise a mechanism to achieve this.

  As shown in FIG. 5, after the completion of the snow melting of the specific snow melting roof panel, in the situation where the snow melting of the other snow melting roof panels is also completed in the snow melting roof panel assembly, steam is also supplied to the drain pipe which is the bypass. Since it disappears, the temperature near the water drainage pipe inlet decreases. On the other hand, when the temperature of the drainage pipe inlet side (near the thermostat 60) decreases, the thermostat 60 installed near the drainage pipe inlet reacts and pushes up the pin at the tip of the thermostat 60.

  As a result, since the pin at the tip of the thermostat 60 is pushed out, the water vapor switching member 50 is released by overcoming the elastic force of the interposition member 70 installed while being connected to the pin at the tip of the thermostat 60 and biased downward. On the other hand, the temperature of the diaphragm member 20 installed on the steam discharge side is also lowered (vapor pressure becomes weak). Therefore, the diaphragm member 20 installed on the water vapor outlet side is biased by the elastic body in the direction (upward direction in FIG. 5) that prevents reversal, and the diaphragm member 20 having the rod-shaped extruding member 30 near the center is Return to a convex shape. Eventually, the water vapor switching member 50 again closes the drainage pipe. This state is the state before the start of operation.

<Snow melting situation and steam supply situation due to installation of switching valve>
FIG. 6 is a schematic diagram for explaining a steam supply state associated with a snow melting situation. Fig.6 (a) is a figure showing the state with snowfall in all the snow melting roof panels, and FIG.6(b) has completed the snow melting of the snow melting roof panel of the uppermost step, and is laid below it. It is a figure showing the state where snow has piled up on the snow-melting roof panel which was done, and FIG.6(c) shows that the snow-melting roof panel of the uppermost stage and the 2nd stage has completed snow melting, and is laid under it. It is a figure showing the state where snow has piled up on the snow melting roof panel.

  As shown in FIG. 6A, when all the snow melting roof panels have snow, water vapor passes through all the snow melting roof panels. Then, when the snow melting progresses and the snow melting of the uppermost snow melting roof panel is completed, the pressure of water vapor becomes larger than the biased elastic force applied to the diaphragm member, as shown in FIG. 6B. At a moment, the diaphragm type switching valve 10 is actuated, the steam flow path to the roof panel side is closed, and the steam enters the drain pipe. Then, it will be directly supplied to the snow melting roof panels from the second stage. That is, the steam is directly supplied to the second and subsequent snow melting roof panels without passing through the uppermost snow melting roof panels. When the snow melting of the second snow melting roof panel is completed after the snow melting roof panel of the uppermost stage, the diaphragm type switching valve 10 similarly passes through the uppermost snow melting roof panel and the second snow melting roof panel. Without doing so, the steam is directly supplied to the snow melting roof panels from the third stage onwards.

<Effect of switching valve>
According to the present embodiment, the snow melting roof panel after the completion of snow melting is provided with a water vapor passage (bypass) for the water draining pipe (see FIG. 7) that was installed so as not to leave water inside the snow melting roof panel. As a result, it has become possible to automatically prevent water vapor from passing through the snow melting roof panel that has completed snow melting.

  That is, in the roof panel assembly with a snow melting function, steam is not supplied to the snow melting roof panel where the uppermost (upper) snow melting is completed, and the second, third,...・We developed a mechanism using the heat-sensitive switching valve 10 to supply steam to the (lower) snow melting roof panel. In short, it becomes possible to provide a diaphragm type switching valve 10 for changing the flow of steam passing through a snow melting roof panel in which snow melting has been completed and allowing water vapor to pass through a drain pipe (see FIG. 7). It was As a result, the snow melting does not continue to be supplied with water vapor even though the snow melting has already been completed at the uppermost stage (upper side) of the snow melting roof panel assembly, thereby eliminating waste of energy. That is, while maintaining the snow melting speed of the roof panel aggregate with a snow melting function as a whole, the heat radiation from the snow melting roof panels installed in the top, second, third... Can be effectively used only for.

<Example of change of switching valve>
The configuration of the switching valve according to the present invention is not limited to the aspect of each of the above-described embodiments, and is for a diaphragm member, an extruding member, a connecting member, a steam switching member, a thermostat, an intervening member, a wire member, an interposing member. The configuration of the elastic body and the like can be appropriately changed as necessary without departing from the spirit of the present invention.

  Since the switching valve according to the present invention has excellent effects as described above, it can be suitably used in the field of a switching valve that can effectively use thermal energy for snow melting in a snow melting roof panel. .

10-Switching valve 20-Diaphragm member 30-Extrusion member 40-Connecting member 50-Water vapor switching member 60-Thermostat 70-Interposing member 80-Wire member 90-Elastic body for interposing member

Claims (1)

A switching valve for switching the flowing direction of water vapor, which is installed by being connected to each other on the water vapor outlet side of the roof panel with a snow melting function and the water vapor supply inlet side,
On the side of the water vapor discharge port, a diaphragm member that is biased by an elastic body in a direction that prevents reversal and has an extruding member in the vicinity of the center, and rotates in association with the reversing movement of the diaphragm member. Equipped with a connecting member installed,
The water vapor supply port side is provided with a rotatably mounted gear, and immediately before the completion of snow melting, the diaphragm member is urged by an elastic body in a direction to prevent reversal, thereby draining water. A steam switching member that rotates so that the pipe is closed, and when the snow melting is completed, the diaphragm member is inverted to rotate so that the steam from the steam supply port side flows to the drain pipe ,
A thermostat having a pin that moves up and down at the tip is rotatably installed, and the tip shape on one end side is a shape that can mesh with the gear installed on the water vapor switching member, etc. Until the temperature near the end of the thermostat joined to the pin of the thermostat decreases, the steam is continued to flow into the drainage pipe, an intervening member for fixing the rotation of the steam switching member is provided,
The switching valve further includes a wire member that connects the connecting member on the side of the steam outlet and the steam switching member on the side of the steam supply port.

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