JPH0431419Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a utility pole branch line snow melting device that removes snow accumulation and settling loads on utility pole branch lines.

[Technical background] In areas with deep snow, when the branch lines of utility poles are buried due to snowfall, in order to prevent transmission line accidents caused by breakage of the branch lines or falling of the utility poles, it is necessary to manually dig with a scoop to remove the snow near the branch lines. are excluded. This manual digging work required a great deal of labor and a huge amount of money under winter conditions.

In order to solve these problems, the same applicant has proposed a utility pole branch line snow melting device according to Utility Model Application No. 3489/1983. This branch line snow melting device consists of a heat radiating part attached to the branch line of a utility pole, and a heating part connected to the heat radiating part and buried underground.A refrigerant is sealed in a hollow pipe, and the area around the branch line is heated using geothermal heat. It melts snow.

[Problems in Technical Background] By the way, in the snow melting device, when the outside temperature drops regardless of the presence or absence of snow, the refrigerant that has been vaporized by absorbing geothermal heat is cooled and liquefied.

Therefore, geothermal heat is dissipated early in the early winter when there is relatively little snowfall and there is no need to melt snow on the branch line.As a result, the geothermal temperature is low and snowfall is large, and the branch line is dissipated at an early stage when there is no need to melt snow. There is a concern that it will not be possible to efficiently melt snow.

Therefore, as disclosed in Japanese Utility Model Application No. 60-128173, by injecting a working fluid into the heat pipe main body and providing a valve that can be opened and closed approximately in the center along the longitudinal direction, the inside of the heat pipe main body is It is conceivable to open the space between the heat radiating part and the heating part only when it is necessary to melt snow, thereby efficiently melting snow on the branch line.

However, with snow melting equipment that uses such heat pipes, workers must manually open the valves each time snow accumulates, which is not only cumbersome, but also requires constant manual labor to open and close the valves. It had some problems that required it.

An object of the present invention is to provide a snow melting device for utility pole branch lines that can automatically melt snow on branch lines according to the amount of snowfall without requiring human labor.

[Means for solving the problem] The present invention seals a refrigerant in a hollow pipe consisting of a heat radiating part attached to a branch line of a utility pole and a heating part connected to the heat radiating part and buried underground. A horizontal pressure detection plate is provided on the heat radiation part side of the hollow pipe so as to be movable in the vertical direction, and an elastic body is provided to always urge the pressure detection plate upward, and the pressure detection plate is provided between the heat radiation part and the heating part in the hollow pipe. A valve seat is provided on the valve seat, and a valve body that can be seated on the valve seat is provided so as to be interlocked with the pressure detection plate.

[Operation] When there is no snow or a small amount of snow, the pressure detection plate is biased by the elastic body due to the decrease in the snow settling pressure, and in conjunction with this, the valve body closes the valve seat and disconnects the heating part and the heat radiation part. On the other hand, when the snow settling pressure increases due to snowfall, the pressure detection plate lowers, and in conjunction with this, the valve body opens the valve seat and conducts the heat from the heat radiation part to the heating part, which melts the snow on the branch line. It will be done.

[Embodiment of the invention] Figures 1 and 2 show a first embodiment of the invention, in which a heat dissipating part 4 of a hollow pipe 3 is attached to a branch line 2 supporting a utility pole 1 along the branch line 2, such as a band. It is attached by a fastener 5 of. This hollow pipe 3 is connected to a heating section 7 buried underground 6 to a depth where the geothermal temperature is, for example, 9° C. or higher. This hollow pipe 3 is a pipe (heat pipe) made of copper, aluminum, stainless steel, iron, or a composite material of these materials, and the inside thereof is evacuated and a refrigerant 8 such as fluorocarbon, ammonia, or butane is sealed therein. It is preferable that the diameter of the heat dissipating section 4 is smaller than that of the heating section 7, and a heat insulating material 9 is appropriately wrapped around the part of the heating section 7 close to the ground to dissipate heat in the region where the geothermal temperature is low. is prevented.

In this way, the hollow pipe 3 is divided into a heating part 7 that heats the refrigerant 8 using geothermal heat, a heat insulating part 10 around which a heat insulating material 9 is wound, and a heat radiating part 4 that radiates heat to the snow S. In this embodiment, R-114, for example, is used as the refrigerant 8 to explain the operation.

Automatic opening/closing valve 2 that opens and closes in response to snow settling pressure
1 is a sealed chamber 2 located on the ground between the heating section 7 and the heat radiation section 4 of the hollow pipe 3 and provided in the frame 22.
3, and below this sealed chamber 23 is a valve seat 24.
form. A valve body 25 seated on the valve seat 24 is provided at the lower end of a small-diameter guide shaft 26 that loosely inserts into the heat radiating section 4 and heating section 7 . The frame 22 is attached to the branch line 2 with nuts 27 and attachment fittings 28.
Further, the guide shaft 26 is provided with a large diameter portion 29 near the upper end, one end of a lever 30 abuts on this large diameter portion 29, and the intermediate portion of the lever 30 is provided so as to be rotatable by a shaft 31. On the other hand, the other end is made of magnetic material and the sealed chamber 2
It is provided along the inside of the side surface portion 32 of No. 3. Further, a pressure receiving plate 34, which is a pressure detecting plate provided with a magnet 33, is provided on the outside of the side surface portion 32 so as to be attached thereto. One end of an arm 35 is fixed to the base end of the pressure receiving plate 34, and the other end of the arm 35 is laterally pivoted to the outside of the frame 22 concentrically with the shaft 31 to receive the pressure. The plate 34 is provided so as to be movable in the vertical direction.
Moreover, the pressure receiving plate 3 is disposed between the pressure receiving plate 34 and the fixed plate 36.
A bullet 37, which is an elastic body, is interposed to constantly urge the ball 4 upward.

Next, the operation of the above structure will be explained.

When the pressure receiving plate 34 is buried in the snow due to snowfall and the snow settling pressure acts on the pressure receiving plate 34, the pressure receiving plate 34 descends against the bullet 37 and rotates clockwise.
As the magnet 33 moves downward with this rotation, the arm body 35 also rotates clockwise. Therefore, one end of the arm body 35 pushes up the large diameter portion 29, and the valve body 25 separates from the valve seat 24. In this case, R-11
The boiling point of 4 is 3.77℃, but since it is sealed in a vacuum, it evaporates from -several tens of degrees Celsius and flows upward through the internal space at high speed, rising to a pressure that is in balance with the geothermal temperature of about 9℃. Continue evaporation until Then, the melted gas G passes through the automatic on-off valve 21 that opens in conjunction with the pressure receiving plate 34 and radiates heat in the upper heat radiating section 4, that is, the melted gas decreases in temperature below the gas temperature in the heating section 7, so it contracts and liquefies again. Then, it returns to the heating section 7 along the inner wall of the hollow pipe 3. Gas G vaporized in this way
Due to the cycle in which the snow radiates heat and liquefies again, the snow around the heat radiator 4 melts, that is, the heat radiator 4
A cavity 11 is formed around the branch line 2 to which the branch line 2 is attached. Since the area around the branch line 2 is insulated from the outside air by the snow S, even a slight increase in temperature will melt the snow that comes into contact with it, so a cavity 11 is created around the branch line 2 by the heat dissipation part 4, and the snow It is possible to prevent a settling load from being applied to the branch line 2.

On the other hand, when the amount of snow is small or there is no snow, the pressure receiving plate 34 is lifted by the ammunition 37. Therefore, the guide shaft 26 descends due to its own weight, seats on the valve seat 24 of the valve body 25, and closes the automatic opening/closing valve 21, so that the gas G of the refrigerant 8 does not rise to the heat radiation part 4.
As a result, no heat exchange occurs. Therefore, the temperature underground 6 does not decrease. In addition, in this state, the gas G of the refrigerant 8
becomes saturated.

As described above, the rotation of the pressure receiving plate 34 due to snow accumulation is transmitted to the lever body 30 using magnetic force, and the movement of the lever body 30 is transmitted to the automatic opening/closing valve 21 via the guide shaft 26.
Since the opening/closing movement is possible, the automatic opening/closing valve 21 can be automatically opened when there is snow, and can be automatically closed when there is no snow. Therefore, when it snows, the refrigerant 8 is vaporized by the geothermal heat in the ground 6, efficiently heating the hollow pipe 3, and the snow around the branch line 2 is melted by heat radiation, and the snow sedimentation load applied to the branch line 2 can be removed. Breakage or falling of the utility pole 1 can be prevented. Furthermore, using geothermal heat, hollow pipe 3
Once installed in this way, snow accumulation around branch line 2 will be reduced even if left as is.
can be melted. Moreover, the automatic open/close valve 21 is connected to the heat dissipation section 4.
By providing it between the heating unit 7 and the heating unit 7, dissipation of geothermal heat can be prevented when there is no snow, and as a result, a drop in temperature of the geothermal heat can be suppressed, and only when it is snowing, the geothermal heat can be dissipated to efficiently melt snow.

Furthermore, the motion of the pressure receiving plate 34 can be converted into the opening/closing motion of the automatic opening/closing valve 21 by means of the guide shaft 26 and the like. still,
A magnet may be provided on the pressure receiving plate and one end of the lever may be made magnetic, or magnets may be provided on both ends.

3, 4, and 5 show a second embodiment of the present invention, in which a hollow pipe 40 is divided into upper and lower halves, and a telescopic upper bellows 41 is connected to the lower end of the upper divided hollow pipe 41A, while the lower A lower bellows 42 is connected to the upper end of the divided hollow pipe 41B. An elevating plate 43 is fixed between the upper and lower bellows 41 and 42, and a through hole 44 for communicating the upper and lower bellows 41 and 42 is formed in the elevating plate 43. A wire 45 is suspended from the elevating plate 43, and a valve body 46 is connected to the lower end of the wire 45. The valve body 46 and the valve seat 47 allow the valve 48 to
Configure.

Shafts 49 are provided protruding from both sides of the lifting plate 43, and one end of a lever body 50 is loosely inserted into the shaft 49, and a pressure receiving plate 51, which is a pressure detection plate for snow accumulation, is placed horizontally on the other end of the lever body 50. Provided for. Further, a shaft 52 is inserted into the center of the lever body 50 so as to be rotatable in the vertical direction with respect to the frame 53. In addition, 54 is an elastic body for adjusting the settling pressure that always urges the pressure receiving plate 51 upward, 55 is a tightening fitting for a branch line 56 provided on the other side of the frame 53, 57 is an upper and lower bellows 41, 4
This is the second protection tube.

Next, the operation of the above structure will be explained.

First, the snow melting device 58 is attached to the branch line 56 using the fastening fitting 55. When snow accumulates and sedimentation pressure is generated, the pressure receiving plate 51 descends against the sedimentation pressure adjustment bomb 54 and rotates clockwise. In conjunction with this rotation, the elevating plate 43 rises, and as a result of this rise, the valve body 4
6 is pulled up and valve 48 is opened. Therefore, the gas G in the heating section 40B is transmitted through the lower bellows 42, the through hole 44,
It reaches the heat radiation part 40A through the upper bellows 41, and can melt the snow around the branch line 56.

On the other hand, when there is no snow or when there is a small amount of snow, the pressure receiving plate 51 is lifted by the sedimentation pressure adjustment bomb 54, and the valve 48 can be closed.

As described above, by providing the upper and lower bellows 41 and 42 in the middle of the hollow pipe 40 for sealing, and by providing the valve 48 that interlocks with the snow pressure receiving plate 51, the temperature of the geothermal heat is reduced during periods other than snowfall. can be prevented.

6 and 7 show a third embodiment of the present invention, in which a hollow pipe 61 is divided into upper and lower halves, an upper bellows 62 is provided at the lower end of the upper divided hollow pipe 61A, and a lower bellows 62 is provided at the lower end of the lower divided pipe 61B. bellows 6
3 will be provided. And upper and lower bellows 62, 63
An elevating plate 64 is fixedly provided in between, and a through hole 65 is formed in the elevating plate 64. In addition, the elevating plate 6
A pressure receiving plate 66 serving as a pressure detecting plate is horizontally fixed on the outside of the valve body 4, and a valve body 67 is suspended from the elevating plate 64 by a wire 67A. This valve body 67 and valve seat 68
The valve 69 is constructed by: 70 is the pressure receiving plate 6
6 is a compression coil spring which is an elastic body that always urges upward, 71 is a receiving washer, and 72 is a settling pressure adjusting nut.

Next, the operation of the above structure will be explained.

When snow settling pressure is generated, the pressure receiving plate 66 descends against the compression coil spring 70, and this action lowers the valve body 67 and opens the valve 69. For this reason, gas G
can melt the snow around the branch line 73 through the upper and lower bellows 62 and 63.

Also, although geothermal heat was used to heat the hollow pipe, if underground water or hot springs exist near the branch line, they can be used as a heat source.

[Effects of the invention] The present invention seals a refrigerant in a hollow pipe consisting of a heat radiating part attached to a branch line of a utility pole and a heating part connected to the heat radiating part and buried underground. A horizontal pressure detection plate is provided on the side of the hollow pipe so as to be movable in the vertical direction, an elastic body is provided to always urge the pressure detection plate upward, and a valve seat is provided between the heat radiation part and the heating part in the hollow pipe. and a valve body that can be seated on the valve seat so as to be interlocked with the pressure detection plate, and the branch line of the utility pole is capable of automatically melting snow on the branch line according to the amount of snowfall without requiring human labor. Snow melting equipment can be provided.

[Brief explanation of the drawing]

Figures 1 and 2 show the first embodiment of the present invention; Figure 1 is a partially cutaway front view, Figure 2 is a sectional view of the main part, and Figures 3, 4, and 5 are the first embodiment of the present invention. Fig. 3 is a sectional view, Fig. 4 is a partially cutaway plan view, Fig. 5 is a longitudinal sectional view of the main part, and Figs. 6 and 7 are the third embodiment. , FIG. 6 is a sectional view, and FIG. 7 is a plan sectional view of the main part. 1... Telephone pole, 2, 56, 73... Branch line, 3, 4
0,61...Hollow pipe, 4,40B...Heat radiation part, 6...Underground, 7,40B...Heating part, 8...
Refrigerant, 24, 47... Valve seat, 25, 46... Valve body, 34, 51, 66... Pressure receiving plate (pressure detection plate),
37, 54, 70...Bullet (elastic body), S...Snowfall.

Claims (1)

[Scope of utility model registration request] A refrigerant is sealed in a hollow pipe consisting of a heat dissipation section attached to a branch line of a utility pole and a heating section connected to the heat dissipation section and buried underground, and a horizontal pressure detection plate is installed on the heat dissipation section side of the hollow pipe. A valve that is movable in a vertical direction and is provided with an elastic body that always urges the pressure detection plate upward, a valve seat is provided between the heat radiation part and the heating part in the hollow pipe, and the valve is seatable on the valve seat. A utility pole branch line snow melting device, characterized in that a body is provided so as to be interlocked with the pressure detection plate.