JP4076926B2 - Snow melting equipment - Google Patents

Description

  The present invention relates to a snow melting device that melts snow on a parking lot or a road in winter.

As such a conventional snow melting device, a gas burner using, for example, gas as fuel is used as a heat source in a rectangular parallelepiped housing, and a hot water supply unit including a hot water supply device including the gas burner is installed outdoors and is subject to snow melting. Plastic pipes are buried in parking lots and roads. When the snowfall sensor detects the start of snowfall, the hot water heated by the hot water supply device is circulated through the buried pipe. And the warm water cooled during the circulation is again heated with the hot water supply apparatus, and is sent out to a pipe (refer patent document 1).
Utility Model Registration No. 2577736 (FIG. 1)

  In the conventional hot water supply unit, since the hot water supply device is built in the housing, it is necessary to provide an intake port for taking in combustion air into the gas burner in the hot water supply device. An air inlet may be provided in front of the hot water supply unit, but the design is impaired, and snow easily enters the inside from the air inlet. Therefore, it is desirable to provide an intake port on the back surface of the hot water supply unit. Since the place where the snow melts is outdoors, it is generally installed such that a predetermined space is opened from the wall surface of a building or the like and the back surface of the hot water supply unit corresponds to the wall surface.

  However, if there is snowfall from the roof of the building, the snowfall covers between the wall surface and the hot water supply unit, which may inhibit the suction of combustion air from the intake port. In the conventional snow melting apparatus, one hot water supply unit is installed. However, when a plurality of hot water supply units are connected and used in accordance with the snow melting area, the side surfaces of the hot water supply units approach each other. Therefore, if it is other than the front surface, the intake port can be provided only on the rear surface, and the suction of combustion air from the intake port is still hindered.

  By the way, as described above, it is conceivable to increase the hot water supply capacity by connecting hot water supply units in the horizontal direction according to the snow melting target range, but in order to connect the hot water supply units, a reciprocating pair of circulating water pipes and fuel supply pipes are used. A gas pipe must be interconnected between adjacent hot water supply units. Hot water in the circulating water pipe is high in pressure and easily leaks. Further, although the gas in the gas pipe is low in pressure, it is not allowed to leak even in a small amount.

  For this reason, when connecting the circulating water pipe and the gas pipe to each other, it is necessary to securely connect the hot water and the gas so as not to leak from the connecting portion. Since these circulating water pipes and gas pipes are made of metal pipes, there is a possibility that they cannot be reliably connected if the relative positions of the hot water supply units connected to each other shift. In order to position the hot water supply unit, an adjuster bolt is often used on the bottom surface of the hot water supply unit. However, since there is a wall surface on the back of the hot water supply unit, it is extremely difficult to adjust all the adjuster bolts. In particular, when the hot water supply unit must be replaced due to a failure or the like during a snowfall period, the operation must be performed quickly because the operation is performed in extremely cold.

  Then, in view of said problem, this invention makes it a subject to provide the snow melting apparatus which can eliminate the said malfunction.

  In order to solve the above-described problems, a snow melting device according to the present invention includes a plurality of hot water supply units each incorporating a hot water supply device having a burner as a heat source in a rectangular parallelepiped housing, and is embedded in a snow melting target range. In a snow melting device that circulates hot water heated by a hot water supply device in each hot water supply unit to a hot water pipe, a fuel supply that supplies fuel to at least a circulating water pipe that circulates hot water in each hot water supply unit and each burner on the side surface of the hot water supply unit An opening through which the pipe passes is formed, a seal member is provided for sealing the opening from the outside when the hot water supply units are connected to each other, and at least one of the hot water supply units at both ends in the lateral direction is connected to each other. An intake port for taking in combustion air is formed on the outer side surface, and the combustion air sucked from the intake port is passed through the opening to another hot water supply unit. And said that it has to be supplied to the Tsu door.

  Even if snowfall from the roof of the building located behind the hot water supply unit closes the wall between the building wall and the rear surface of the hot water supply unit, it becomes difficult to intake air from the rear surface of the hot water supply unit. Since the side surface facing the outer side of the hot water supply unit located at is not opposed to the wall surface, the intake air for combustion can be sucked from the intake port provided on the side surface. In addition, since the other hot water supply units are connected through the opening, the casings of all the hot water supply units are communicated with each other through the opening. Therefore, the combustion air sucked from the side surface of the hot water supply unit located at the end flows to all the hot water supply units through the openings, and it is possible to prevent the combustion air from being insufficient.

  Thus, if the inlet is formed on the side surface of the hot water supply unit located at the end, each of the hot water supply units has an intake port on the back surface, and is installed with a predetermined distance between the wall surface and the back surface. This is particularly advantageous.

  By the way, the sealing member is sandwiched between two hot water supply units and compressed, and at least one of the mutually opposing side surfaces of the two hot water supply units has a distance between both hot water supply units equal to or greater than a predetermined distance. Providing distance regulating means for restricting them from approaching and providing positioning means for relative positioning in the front-rear direction and the vertical direction of both hot-water supply units in both hot-water supply units makes it possible to tighten the seal properly and reliably It is possible to ensure sealing performance. Further, if the hot water supply units are connected to each other in a state where they are positioned by the positioning means, the relative positions of the two are not shifted, and the subsequent piping work can be performed smoothly and reliably.

  For at least one system of the circulating water pipe and the fuel supply pipe, an O-ring is mounted in the vicinity of each end of a pair of pipes connected to each other, and one of the pipes is slidable and connected to the other pipe. The sleeve has a sleeve that slides over the O-ring and covers the connecting portion in contact with the O-rings of both pipes, and the other pipe has a groove into which a set screw provided near the tip of the sleeve is inserted. It is formed at the center of the pipe rather than the O-ring, covers the tip of the sleeve before connection, and prevents dust from entering the sleeve. When the screw position restricting means that prevents the screw from being screwed to the position where it contacts the ring is formed, both the pipes are connected to each other simply by sliding the sleeve and turning the screw at the tip of the sleeve. It can be. Further, since the screw position is regulated by the screw position regulating means, there is no possibility of damaging the O-ring at the tip of the screw when the sleeve is slid.

  As is apparent from the above description, the present invention is a snow melting device that melts snow by warming hot water with a burner and circulating hot water through a pipe embedded in the ground. Accordingly, even when the space between the wall surface located at the back of the hot water supply unit and the hot water supply unit is blocked by snowfall or the like, combustion air can be supplied to each hot water supply unit. .

  In addition, when connecting the hot water supply units, the connection work can be performed in a short time, so that it is possible to reduce the burden on the work in extreme cold, for example.

  Referring to FIG. 1, reference numeral 1 denotes a snow melting device according to the present invention. The snow melting device 1 has a main unit 2 that is a hot water supply unit and a subunit 3 that is also a hot water supply unit. In this embodiment, two subunits 3 are connected to one main unit 2 in a row in the horizontal direction. However, the number of subunits 3 is increased or decreased as appropriate according to the size of the snow melting target range.

  The main unit 2 and the two subunits 3 are installed on a foundation B provided in contact with the wall surface W. The foundation B is formed in the vicinity of the snow melting target range, and a relatively flexible resin pipe 11 is embedded in the snow melting target range. This pipe 11 is connected to an outgoing water pipe 41 and a condensate pipe 42 which are circulating water pipes.

  Circulating water is filled in the pipe 11, and hot water discharged from the main unit 2 through the water supply pipe 41 circulates in the pipe 11 and is returned from the condensate pipe 42 to the main unit 2. Then, the circulating water that has returned through the condensate pipe 42 is heated by the main unit 2 and the subunit 3 and is circulated from the water pipe 41 to the pipe 11 again.

  A temperature sensor 14 is embedded in the vicinity of the pipe 11, and is configured to measure the temperature of the soil heated by the warm circulating water in the pipe 11 and to input a detection signal to the control device in the main unit 2. ing. By the way, 12 is a remote control installed in the room, and the operation of the snow melting device 1 can be controlled indoors. Further, a snowfall sensor 13 is provided. When the snowfall sensor 13 detects the start of snowfall, the hot water is automatically circulated through the pipe 11. Note that the heat source of the main unit 2 and the subunit 3 is a gas burner, and the drain generated by the combustion of the gas is collected in the main unit 2 and discharged through the drain pipe 20 to the seepage trough 20a.

  Referring to FIG. 2, hot water supply devices 21 and 31 are incorporated in main unit 2 and sub unit 3, respectively. Then, in the drawing of the main unit 2, the forward water pipe 41, the condensate pipe 42, and the gas pipe 5 are connected to the main unit 2 through the opening 22 directed to the left side and the openings 32 and 33 provided on both side surfaces of the subunit 3. To the left end subunit 3 in the figure, the units were connected at the joints. In addition, with reference to FIG. 3, the annular packing P surrounding the opening 32 was pasted in advance on the right side surface in the drawing of the subunit 3. In addition, a closing plate 30 that closes the opening 22 is attached to the left side of the main unit 2 before connection, and when the other subunits 3 are connected, the closing plate 30 is removed and the direction of the connected subunits. It was attached to the left side, and the opening 33 on the left side was newly closed.

  By the way, the rear surface of the subunit 3 is provided with an intake port for taking in combustion air, but the combustion air sucked from the intake port 24 provided in the right side surface 23 in the figure of the main unit 2 is the main air. In addition to being supplied to the hot water supply device 21 of the unit 2, it is supplied to the hot water supply devices 31 of all the subunits 3 through the openings 22, 32 and 33. 2P is a circulation pump for circulating hot water.

  Referring to FIG. 3, the packing P is attached to the right side surface 34 of the subunit 3 as described above. The packing P is formed of a foamable resin such as urethane foam, and is formed so as to have a thickness of 10 mm in an uncompressed body. And the protrusion 35 which is a distance control means which protruded 6 mm from the right side surface 34 was formed in the upper and lower sides of this packing P. As shown in FIG.

  A hole 35a through which the connecting bolt 16 is inserted is formed in the center portion of the projecting seat. When the other subunit 3 is connected to the main unit 2 or the subunit 3 with the connecting bolt 16, the packing P has a thickness of 6 mm. Until it becomes, and no further compression.

  In this embodiment, an 8 mm screw (M8) is used as the connecting bolt 16, and a hole 35 a having a diameter of 9 mm is formed in the projecting seat 35. Further, a hole 25a having a diameter of 9 mm through which the connecting bolt 16 is inserted is also provided on the left side surface 25 of the main unit. Therefore, the main unit 2 and the subunit 3 that are connected to each other by the connecting bolt 16 are positioned with a positional accuracy within 0.5 mm in the front-rear and vertical directions. In this embodiment, the connecting bolt 16, the hole 35 a of the protrusion 35 and the hole 25 a of the left side surface 25 constitute a positioning means. The left side surface 36 of the subunit 3 is similarly provided with a hole 36a, and the same positioning can be performed when the two subunits 3 are connected.

  When the main unit 2 and the subunit 3 are connected to each other by the connecting bolts 16 in this way, the adjuster bolts 15 attached to the bottoms of both the units 2 and 3 are adjusted so that each adjuster bolt 15 is applied to the foundation B. Make contact. And although not shown in figure, an anchor bolt is embed | buried in the foundation B and the adjuster bolt 15 is fixed to the foundation B with a pressing metal fitting.

  When the units 2 and 3 are thus connected to each other, the outgoing pipe 41, the condensate pipe 42, and the gas pipe 5 are connected next. Since the pipes are connected in the same manner, the connection operation will be described with reference to FIG. 3 taking the connection of the gas pipe 5 as an example. A connecting fitting 51 is brazed to the upstream end of the gas pipe 5 built in the sub unit 3 in advance, and another connecting fitting is attached to the downstream end and the downstream end of the gas pipe 5 of the main unit 2. 54 is brazed.

  Two O-rings 53 are attached to the upstream connection fitting 51, and a sleeve 52 that slides while covering the two O-rings is further attached. Similarly, two O-rings 56 are attached to the downstream connection fitting 54, and the sleeve 52 is slid so that the O-ring 56 of the opposite downstream connection fitting 54 is connected with the sleeve 52 as shown in the figure. If covered, the gas pipe 5 is connected. However, since the connection is released when the sleeve 52 retreats as it is, the screw 52a attached to the distal end portion of the sleeve 52 is inserted into the groove 55 formed in the downstream connection fitting 54 so that the sleeve 52 I tried not to retreat. Reference numeral 50 denotes a metal end cap.

  By the way, it is not desirable that dust or the like enters the gas pipe 5 until the sleeve 52 is slid and the gas pipes 5 are connected. Therefore, until such a connection operation is performed, the cap C shown in FIG. 4 is put on the sleeve 52 so that dust does not enter the gas pipe 5.

  The cap C is made of rubber, and a thick portion is formed on a part of the outer periphery, and a cut groove C1 having an open end is formed in the thick portion. The cap C cannot be attached to the sleeve 52 unless the screw 52a is accommodated in the cut groove C1. Further, since the cut groove C1 is formed in a thick portion, the screw 52a cannot enter the cut groove C1 unless the screw 52a is largely screwed back to the outside. Therefore, when the cap C is attached to the sleeve 52, the screw 52a is always in a position where it is screwed back outward.

  During the connecting operation, the cap C is removed from the sleeve 52 and the sleeve 52 is slid. However, since the screw 52a is unscrewed, the tip of the screw 52a does not contact the O-ring 56 on the other side, and therefore the screw 52a Damage to the O-ring 56 at the tip is prevented.

  By the way, as shown in FIG. 5, intake ports 37 are formed on the rear surface of the subunit 3. However, when the upper part of the space BS between the units 2 and 3 and the wall surface W is closed by the snowfall S as shown in the figure, it becomes difficult to suck a sufficient amount of combustion air from the intake port 37. . However, since the intake port 24 is formed in the right side surface 23 of the main unit 2 as described above, the air sucked from the intake port 24 is also supplied to each subunit 3 through the openings 22, 32, 33. Since the air is supplied, the shortage of air sucked from the air inlet 37 can be supplemented by the air sucked from the air inlet 24.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention. For example, although the gas burner is used as the heat source of the hot water supply devices 21 and 31, an oil burner that burns liquid fuel such as kerosene may be used as the heat source.

The figure which shows the structure of one embodiment of this invention The figure which shows the connection state of each unit Diagram showing the state of piping between units Diagram showing the shape of the dustproof cap Diagram showing the blockage due to snowfall

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Snow melting apparatus 2 Main unit 3 Sub unit 5 Gas pipe 21 Hot-water supply apparatus 22 Opening 24 Inlet 31 Hot-water supply apparatus 32 Opening 35 Projection 41 Outflow pipe 42 Condensation pipe 51 Connecting metal fittings 52 Sleeve 52a Screw 54 Connecting metal fitting 55 Groove C Cap P Packing S Snowfall W Wall

Claims (4)

  Hot water heated by the hot water pipes in each hot water supply unit connected to the hot water pipes embedded in the snow melting target area by connecting a plurality of hot water supply units with built-in hot water supply devices that use a burner as a heat source in a rectangular parallelepiped housing. In the snow melting apparatus that circulates, at least a circulating water pipe for circulating hot water to each hot water supply unit and an opening for passing a fuel supply pipe for supplying fuel to each burner are formed on the side surface of the hot water supply unit. A seal member is provided to seal this opening from the outside when connected, and an intake port for taking in combustion air is formed on the outer side surface of at least one of the hot water supply units at both ends in the lateral direction with the hot water supply units connected to each other. The snow melting device is characterized in that the combustion air sucked from the intake port is supplied to another hot water supply unit through the opening. .   2. The snow melting device according to claim 1, wherein each of the hot water supply units has an intake port on a back surface, and is installed with a predetermined distance between the wall surface and the back surface.   The sealing member is sandwiched between two hot water supply units and compressed, and at least one of the mutually opposing side surfaces of the two hot water supply units does not approach the hot water supply unit more than a predetermined distance. 3. The hot water supply unit according to claim 1 or 2, further comprising a distance control means for restricting the hot water supply unit and a positioning means for performing relative positioning in the front-rear direction and the vertical direction of the hot water supply units. Snow melting equipment.   For at least one system of the circulating water pipe and the fuel supply pipe, an O-ring is mounted in the vicinity of each end of a pair of pipes that are connected to each other, and one pipe is slidable and O It has a sleeve that slides over the ring and covers the connecting part in contact with the O-rings of both pipes, and the other pipe has a groove into which a set screw provided near the tip of the sleeve is inserted. It is formed at the center of the pipe, covers the tip of the sleeve before connection, prevents dust from entering the sleeve, and when the sleeve slides, the end of the set screw connects to the O-ring of the connection partner pipe. The snow melting device according to any one of claims 1 to 3, wherein a screw position restricting means for preventing screwing to a contact position is formed.

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