JP4124353B2 - 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, for example, a hot water supply device using a gas burner as a heat source is built in, a circulating water pipe for circulating hot water heated by this hot water supply device to a pipe embedded in the snow melting target range, and a gas burner. One having a hot water supply unit in which a gas pipe for supplying gas is connected is known. When a separately installed snowfall sensor detects the start of snowfall, the control device in the control panel built in the hot water supply unit determines that snowfall has started, and automatically circulates the hot water heated by the hot water supply device into the buried pipe. Warm the soil in the snow melting target area. And the warm water cooled by having warmed the road 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 snow melting device, a control device is built in the hot water supply unit in order to control the operation of the hot water supply device and the circulation pump based on signals input from a remote controller or a snowfall sensor. Although FIG. 1 of patent document 1 has shown the structure of the hot water supply unit typically, the control apparatus is arrange | positioned by the side of the hot water supply apparatus. A pair of circulating water pipes for circulating hot water and a gas pipe for supplying gas to the gas burner in the hot water supply apparatus are disposed below the hot water supply apparatus. Therefore, since these circulating water pipes and gas pipes are not concealed by the control panel, the control panel does not get in the way during repair and maintenance of the circulating water pipes and gas pipes.

  However, in the actual machine, the width dimension of the hot water supply unit is limited by installation conditions and standards, and there is actually no space for arranging the control panel alongside the hot water supply apparatus. Therefore, the control panel must be installed below the hot water supply device and in front of the circulating water pipe and the gas pipe. When the control panel is installed in this way, the control panel becomes an obstacle when repairing or maintaining the circulating water pipe or gas pipe. Remove the control panel first, and then return the control panel to its original position at the end of the work. Must be attached to.

  The place where the snow melting device is installed is an extremely cold environment especially in winter, and it is desirable to finish the work in as short a time as possible when repairing in such a severe cold environment. However, if the operation cannot be performed without removing the control panel, it takes time to remove the control panel, resulting in a problem that the operation time is unduly prolonged.

  Then, this invention makes it a subject to provide the snow melting apparatus which can perform the maintenance and repair work about the back of a control panel in a short time in view of said problem.

In order to solve the above-mentioned problems, a snow melting device according to the present invention includes a hot water supply device that uses a burner as a heat source, and a circulating water pipe that circulates hot water heated by the hot water supply device through a pipe embedded in the snow melting target range. In a snow melting device operated by a remote controller provided in a separate place with a hot water supply unit internally provided with a fuel supply pipe for supplying fuel to the burner, a control panel for controlling the operation of the hot water supply device is provided with the circulating water pipe and the fuel. at least one operating position which is ahead of the feed pipe, between a retracted position retracted from the front of the circulating water pipe and the fuel supply pipe, a swingably fixed holding shaft as a swing center, the operating position in is held by the hot water supply unit so as not to be exposed from the hot water supply unit, provided the fixing means for further securing the control panel in the operating position in one place, fixed by the fixing means of the one portion The control panel and releasing, characterized in that it has adapted to swing to the retracted position.

  If the control panel is not completely removed from the hot water supply unit but is swung to the retracted position while the control panel remains connected to the hot water supply unit, it will be hidden by the control panel when it is in the operating position. Since the exposed portion is exposed by swinging to the retracted position, maintenance work and the like can be smoothly performed on that portion. Since the control panel only needs to be swung between the operation position and the retracted position, the time required for the operation of completely removing the control panel from the hot water supply unit and mounting it again becomes extremely short.

  By the way, it is desirable to fix the control panel at the operation position in normal times. Therefore, fixing means for fixing the control panel at the operation position may be provided at one position, and the control panel may be swung to the retracted position when the fixing by the one fixing means is released. With this configuration, it is possible to fix the control panel at the operation position during normal operation, and at the time of maintenance, etc., the control panel can be swung only by releasing the fixing by one fixing means to operate the control panel. Can be evacuated.

  When the burner is a gas burner, a bracket may be brazed to the gas pipe and the control panel may be fixed to the bracket depending on the layout of the gas pipe that is the circulating water pipe or the fuel supply pipe. In some cases, the control panel is held on a metal holding plate and rocked together with the holding plate. The gas pipe should be electrically insulated from other members, and therefore it is not preferable that the metal holding plate is electrically connected via the bracket. Therefore, the control panel is configured to swing together with the metal holding plate, and the fixing means for engaging the bracket and the holding plate brazed to the gas pipe with each other to fix the control panel. It is desirable to provide an insulating means for electrically insulating the holding plate from the bracket in a state where the bracket and the holding plate are engaged.

  Further, for example, when a plurality of hot water supply units are connected and the holding plate is grounded and the holding plate is used as a common ground plate, it is particularly desirable to provide the insulating means.

  As is clear from the above description, the present invention only swings the control panel to the retracted position without removing it from the hot water supply unit when performing maintenance or repair on the part hidden behind the control panel in the operation position. With this, you can make the hidden part visible from the front. Therefore, maintenance and repair can be completed in a short time, and the working time can be reduced particularly in extreme cold.

  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 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, 23 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 to 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 on the entire downstream connection fitting 54 so that the sleeve 52 retreats. I tried not to. Reference numeral 50 denotes a metal end cap.

  When the front panel 2F of the main unit 2 is removed, the control panel 6 is attached below the hot water supply device 21. The state shown in FIG. 2 is a state in which the control panel 6 faces forward, and the illustrated position is the operation position.

  With reference to FIGS. 4 and 5, a gas pipe 5 is disposed behind the control panel 6. The gas pipe 5 is made of copper, and when the connection fitting 54 is brazed, a U-shaped copper bracket 5B is brazed to the gas pipe 5.

  The control panel 6 is attached to the front surface of a sheet metal holding plate 61. The holding plate 61 is grounded so as to be a common ground when wiring the communication line from the subunit 3. In this embodiment, the upper edge of the holding plate 61 is bent forward to form the flange portion 62. Then, a front cover (not shown) is engaged with the engagement hole 62a of the flange 62 so that the control panel 6 is covered with the front cover.

  Further, a pair of upper and lower arms 61 a are provided at the end of the holding plate 6 so that the holding shaft 63 holds the pair of upper and lower fixed arms 23 a formed on the main unit 2. Therefore, the control panel 6 is held together with the holding plate 61 so as to be able to swing forward about the holding shaft 63.

  When the control panel 6 is swung together with the holding plate 61 to the retracted position shown by the two-dot chain line in FIG. 4, the control panel 6 and the holding plate 61 that have covered most of the lower space of the hot water supply device 21 are Since it retracts, maintenance and repair of the circulation pump 2P and other parts can be easily performed.

  By the way, when such maintenance etc. are not performed, it is desirable that the control panel 6 is fixed at the operation position. Therefore, an extension part 64 is provided on the side of the holding plate 61, and the extension part 64 and the bracket 5B are screwed to fix the control panel 6 to the operation position. Since the holding plate 61 is fixed with one screw in this way, the control panel 6 can be swung to the retracted position simply by removing this screw.

  However, since the holding plate 61 is grounded as described above, the gas pipe 5 and the holding plate 61 need to be electrically insulated. Therefore, as shown in FIG. 5, a sleeve 72 made of resin and having a T-shaped cross section is attached from the rear of the extension portion 64, and the resin ring 73 is similarly fitted to the sleeve 72. 7 is passed through the sleeve 72 and screwed into the bracket 5B. The screw 7 and washer 71 may be made of metal, and the screw 7 and washer 71 do not contact the holding plate 61 by the resin sleeve 72 and ring 73.

  By the way, in the above embodiment, the holding plate 61 is fixed to the bracket 5B with the screw 7. However, other mechanisms may be used. For example, a magnet is fixed to the bracket 5B, and the extension portion 64 is attracted to the magnet and controlled. The panel 6 and the holding plate 61 may be fixed at the operation position.

  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 swinging state of the operation panel Diagram showing insulation structure of holding plate

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 fitting 6 Control panel 61 Holding plate 5B Bracket

Claims (3)

Burner with a built-in water heater as a heat source, a circulation water pipe for circulating the hot water heated by the water heater to buried pipes in snow-melting scope, the fuel therein and a fuel supply pipe for supplying to the burner In a snow melting apparatus equipped with a piped hot water supply unit and operated by a remote controller provided elsewhere, a control panel for controlling the operation of the hot water supply apparatus is circulated with an operation position in front of at least one of the circulating water pipe and the fuel supply pipe. Between the water pipe and the retreat position retracted from the front of the fuel supply pipe , the fixed holding shaft is swingable around the swing center , and the operation position is held by the hot water supply unit so as not to be exposed from the hot water supply unit, further provided fixing means for fixing the control panel in the operating position in one place, the control panel and releasing the fixing by the fixing means of the one place to be swung to the retracted position Snow melting apparatus, characterized in that. The burner is a gas burner using gas as fuel, and the control panel is configured to swing together with a metal holding plate. The bracket and the holding plate brazed to the gas pipe as the fuel supply pipe And the fixing means for fixing the control panel by engaging with each other, and insulating means for electrically insulating the holding plate from the bracket in a state where the bracket and the holding plate are engaged. The snow melting device according to claim 1 . The snow melting device according to claim 2 , wherein the holding plate is grounded.

Images