Transmission line tower base with electric heating air blowing and anti-freezing function suitable for frozen soil areas

Abstract

The present invention provides a transmission line pole tower base with electric heating blowing anti-freeze-pulling function suitable for frozen soil areas, comprising a pile foundation tube, an internal support column of the pile foundation tube, an arc tube, a heating rod and a top blowing device; a pile foundation tube top seat and a transmission line pole tower connecting frame are fixedly installed on the top of the pile foundation tube, and a pile foundation tube base is arranged at the bottom of the pile foundation tube for fixing in the foundation; the internal support column of the pile foundation tube is embedded in the pile foundation tube, so as to ensure the supporting strength of the pile foundation tube; an air flow channel is formed between the internal support column of the pile foundation tube and the pile foundation tube and by using the arc tube, an electric heating rod is arranged in the air flow channel, and a top blowing device is arranged, the blowing airflow of the top blowing device blows into the air flow channel, so as to prompt the heat of the heating rod in the air flow channel to be fully dissipated into the surrounding soil, effectively increase the temperature of the surrounding soil, and avoid excessive freeze-pulling effect caused by too low soil temperature.

Description

Technical Field

[0001] The invention relates to the technical field of transmission line pole tower support, in particular to a transmission line pole tower base with an electric heating air blowing anti-freezing and pulling function suitable for frozen soil areas. Background Art

[0002] Frozen ground is also called frozen soil, tundra or tundra. In physical geography, it refers to an environment where trees cannot grow due to low temperatures and short growing seasons; in geology, it refers to various rocks and soils below 0°C that contain ice. It can generally be divided into short-term frozen ground, seasonal frozen ground and perennial frozen ground; frost heave refers to the situation in seasonal frozen ground or perennial frozen ground areas. In the cold season, when the soil freezes and expands, the support foundation of the transmission line tower fixed in the frozen ground is lifted up due to the tangential frost heave force and loses its fixing effect. When the warm season melts, the soil falls back, and the pulled-up transmission line tower support foundation is difficult to return to its original position, resulting in the pull-up phenomenon. In view of this, it is necessary to propose an anti-freeze-pulling transmission line tower support foundation structure suitable for use in frozen ground areas. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the prior art and provide a transmission line tower base with an electric heating blowing anti-freezing and pulling function suitable for frozen soil areas.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A transmission line tower base with electric heating blowing anti-freezing and pulling function suitable for frozen soil areas, comprising a pile foundation tube, a pile foundation tube top seat, a pile foundation tube base, a transmission line tower connection frame, a pile foundation tube internal support column, an arc tube, an electric heating rod and a top blowing device;

[0006] The top of the pile foundation cylinder is fixedly installed with the pile foundation cylinder top seat, and the transmission line pole tower connection frame is fixedly installed on the pile foundation cylinder top seat, and the transmission line pole tower connection frame is used to connect with the bottom support foot of the transmission line pole tower body;

[0007] The pile foundation tube base is arranged at the bottom of the pile foundation tube, and a plurality of threaded drill rod assemblies are arranged on the pile foundation tube base to fix the pile foundation tube base to the foundation;

[0008] The pile foundation tube has a hollow installation cavity inside, and the internal support column of the pile foundation tube is embedded in the installation cavity of the pile foundation tube; two vertical grooves are symmetrically arranged on the cavity wall of the installation cavity of the pile foundation tube, and two expanded diameter wing plates are symmetrically arranged on the outer tube wall of the lower part of the pile foundation tube, the two expanded diameter wing plates respectively correspond to the lower positions of the two vertical grooves, and an inclined groove is arranged in each expanded diameter wing plate, the top of the groove is connected with the bottom of the vertical groove, and a plurality of groups of installation through holes connected with the groove are symmetrically arranged on the front and back sides of each expanded diameter wing plate, and arc tubes are installed on the front and back sides of the two expanded diameter wing plates through the installation through holes, so that the grooves inside the two expanded diameter wing plates are connected with the arc tube;

[0009] The top of the support column inside the pile foundation tube is provided with an inner cavity for equipment installation. Two holes corresponding to the vertical grooves are symmetrically arranged on the wall of the inner cavity for equipment installation of the support column inside the pile foundation tube, and the two holes are respectively connected with the two vertical grooves in a one-to-one correspondence; two heating rods are symmetrically connected to the outer wall of the support column inside the pile foundation tube through a hinged connector, and the two heating rods are respectively inserted and installed in the two grooves of the pile foundation tube, and the cross-sectional dimensions of the heating rods are smaller than the cross-sectional dimensions of the grooves and the cross-sectional dimensions of the vertical grooves;

[0010] The top blowing device is arranged on the top of the pile foundation tube, and the top blowing device includes an outer tube, a fan and a fan driving motor. The outer tube is fixedly installed on the top of the pile foundation tube, and the fan and the fan driving motor are located inside the outer tube. The fan is connected to the fan driving motor through a connecting shaft. A top cover is arranged on the top of the outer tube, and a side ventilation pipe is also arranged on the side wall of the outer tube. A filter plate is installed at the port of the side ventilation pipe. The blowing direction of the fan is downward, and the blowing airflow enters the groove through the hole and the vertical groove, so that the heat of the heating rod in the groove is diffused into the arc tube with the airflow, thereby fully dissipating the heat to the surrounding soil, effectively increasing the temperature of the surrounding soil, and avoiding excessive freezing and pulling effect caused by too low temperature.

[0011] In the above technical solution, the pile foundation tube is installed in the foundation. During construction, first, a foundation hole is excavated in the foundation, and then the pile foundation tube is installed in the foundation hole and backfilled.

[0012] In the above technical solution, the pile foundation tube base is in the shape of an inverted cone, and the inverted cone-shaped pile foundation tube base can cause the foundation soil inside the pile foundation hole to exert a downward compression effect on it.

[0013] In the above technical solution, the threaded drill rod assembly includes a threaded barrel and a threaded drill rod. The threaded barrel is fixedly arranged on the base of the pile foundation barrel. The threaded drill rod is installed in the threaded barrel through threads. The threaded drill rod is used to drill into the foundation, so that the stability of the pile foundation barrel is better.

[0014] In the above technical solution, a reduced diameter step is provided at the bottom of the installation cavity of the pile foundation tube, which is used to limit the lower limit installation position of the support column inside the pile foundation tube.

[0015] In the above technical solution, a first threading hole is vertically penetrated at the bottom of the pile foundation tube, a second threading hole is opened at the axis of the supporting column inside the pile foundation tube, the bottom end of the second threading hole is communicated with the first threading hole at the bottom of the pile foundation tube, and a third threading hole is also opened at the axis of the pile foundation tube base, the top of the third threading hole is communicated with the bottom of the first threading hole, a temperature sensor is embedded in the bottom of the pile foundation tube base, and the cable of the temperature sensor is led to the equipment installation inner cavity at the top of the supporting column inside the pile foundation tube through the third threading hole, the first threading hole and the second threading hole in sequence.

[0016] In the above technical solution, a fourth transverse threading hole is also provided at a position corresponding to the top end of the heating rod on the internal support column of the pile foundation tube. The fourth threading hole is connected to the second threading hole inside the internal support column of the pile foundation tube. The cable of the heating rod is led into the equipment installation cavity through the fourth threading hole and the second threading hole in turn.

[0017] In the above technical solution, a controller is arranged in the inner cavity of the equipment installation, and the temperature sensor, heating rod and fan drive motor are all electrically connected to the controller. The controller automatically controls the operation of the heating rod and the fan drive motor according to the detection data of the temperature sensor.

[0018] In the above technical solution, the pile foundation tube top seat and the transmission line tower connecting frame are installed on the tube wall of the pile foundation tube below the equipment installation cavity, so that the internal support column of the pile foundation tube can ensure good supporting strength for the pile foundation tube.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The transmission line tower base of the present invention is simple to construct. During construction, a foundation hole is excavated, a threaded drill rod is installed, and then the foundation soil is backfilled. There is no need to excavate a large area of ​​the original foundation and pour concrete (concrete often causes alkalization of the construction area and affects the growth of surrounding vegetation). It is particularly suitable for natural reserves with frozen soil to avoid ecological damage;

[0021] 2. The power transmission line pole tower base with electric heating blowing anti-freezing and pulling function of the present invention mainly comprises a pile foundation tube, an internal support column of the pile foundation tube, an arc tube, a heating rod and a top blowing device; the top of the pile foundation tube is fixedly installed with a pile foundation tube top seat and a power transmission line pole tower connecting frame, and the bottom of the pile foundation tube is provided with a pile foundation tube base for fixing in the foundation; the internal support column of the pile foundation tube is embedded in the pile foundation tube, which can ensure the supporting strength of the pile foundation tube; the present invention forms an air flow channel between the internal support column of the pile foundation tube and the pile foundation tube and by using the arc tube, an electric heating rod is arranged in the air flow channel, and a top blowing device is arranged, and the blowing airflow of the top blowing device blows into the air flow channel, so as to promote the heat of the heating rod in the air flow channel to be fully dissipated into the surrounding soil, effectively increase the temperature of the surrounding soil, and avoid excessive freezing and pulling effect caused by too low soil temperature;

[0022] 3. The present invention connects two heating rods to the outer wall of the inner support column of the pile foundation tube through a hinged connection. The cross-sectional size of the heating rod is smaller than the cross-sectional size of the channel and the cross-sectional size of the vertical groove. Since the top of the heating rod is hinged to the inner support column of the pile foundation tube, the heating rod can be easily pulled out or inserted into the channel, that is, in the process of pulling out or inserting the heating rod, the heating rod can slide along the vertical groove of the pile foundation tube with the movement of the inner support column of the pile foundation tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is a schematic diagram of the installation of the transmission line tower base of the present invention.

[0024] Figure 2 It is a cross-sectional installation diagram of the transmission line tower base of the present invention.

[0025] Figure 3 for Figure 2 An enlarged schematic diagram of point A.

[0026] Figure 4 The figure is a schematic diagram of the bottom structure of the transmission line tower base of the present invention.

[0027] Figure 5 It is a schematic diagram of the structure of the pile foundation tube in the present invention.

[0028] Figure 6 It is a schematic diagram of the combined state structure of the pile foundation tube, the supporting column inside the pile foundation tube and the heating rod in the present invention.

[0029] Figure 7 The figure is a schematic diagram of the internal structure of the transmission line tower base of the present invention.

[0030] Figure 8 for Figure 7 An enlarged schematic diagram of point C.

[0031] Fig. 9 for Figure 2 An enlarged schematic diagram of point B. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Referring to the attached drawings, a transmission line tower base with electric heating blowing anti-freeze pulling function suitable for frozen soil areas includes a pile foundation tube 1, a pile foundation tube top seat 2, a pile foundation tube base 3, a transmission line tower connecting frame 4, an internal support column of the pile foundation tube 5, an arc tube 6, a temperature sensor 7, an electric heating rod 8 and a top blowing device 9.

[0034] The pile foundation tube 1 is installed in the foundation 0 (during construction, first, a foundation hole 10 is excavated in the foundation 0, and then the pile foundation tube 1 is installed in the foundation hole 10 and backfilled), the pile foundation tube top seat 2 is fixedly installed on the top of the pile foundation tube 1, and the transmission line pole tower connecting frame 4 is fixedly installed on the pile foundation tube top seat 2 through a bolt assembly, and the transmission line pole tower connecting frame 4 is used to connect with the bottom support leg of the transmission line pole tower body (that is, each bottom support leg of the transmission line pole tower body is respectively connected to the transmission line pole tower base with a frost heave penetration mechanism of the present invention).

[0035] See attached Figure 3 and attached Figure 4 The pile foundation tube base 3 is arranged at the bottom of the pile foundation tube 1. The pile foundation tube base 3 is preferably in an inverted cone shape. The inverted cone-shaped pile foundation tube base 3 can make the foundation soil inside the pile foundation hole produce a downward compression effect on it; and a plurality of threaded drill rod assemblies are arranged on the pile foundation tube base 3. Specifically, the threaded drill rod assembly includes a threaded tube 31, a threaded drill rod 32 and a protective cap 33. The threaded tube 31 is fixedly arranged on the pile foundation tube base 3. The threaded drill rod 32 is installed in the threaded tube 31 through a thread. The threaded drill rod 32 is used to drill into the foundation, so that the stability of the pile foundation tube is better. The protective cap 33 is installed on the top of the threaded drill rod 32.

[0036] See attached Figure 5The pile foundation tube 1 has a hollow installation cavity 11 inside, which is used to install the support column 5 inside the pile foundation tube. Furthermore, a reduced diameter step 12 is provided at the bottom of the installation cavity 11 of the pile foundation tube 1, which is used to limit the lower limit installation position of the support column 5 inside the pile foundation tube. In addition, a vertically penetrating first threading hole 13 is provided inside the reduced diameter step of the pile foundation tube 1, which is used for threading the temperature sensor 7. The setting of the temperature sensor 7 will be described in detail later; two vertical grooves 1 are symmetrically provided on the cavity wall of the installation cavity 11 of the pile foundation tube 1 4. Two expanded diameter wing plates 15 are symmetrically arranged on the lower wall of the pile foundation cylinder 1. The two expanded diameter wing plates 15 correspond to the lower positions of the two vertical grooves 14 respectively, and an inclined groove 151 is arranged in each expanded diameter wing plate 15. The top of the groove 151 is connected to the bottom of the vertical groove 14, and multiple groups of mounting through holes 152 connected to the groove 151 are symmetrically arranged on the front and back sides of each expanded diameter wing plate 15. The arc tube 6 is installed on the front and back sides of the two expanded diameter wing plates 15 through the mounting through holes 152 (see attached Figure 4 ), so that the grooves 151 inside the two expanded-diameter wing plates 15 are connected to the arc-shaped tube 6.

[0037] See attached Figure 6 -Attached Figure 8 The internal support column 5 of the pile foundation tube is embedded in the installation cavity 11 inside the pile foundation tube 1 and is in close contact with it. The internal support column 5 of the pile foundation tube plays a role of stable support for the entire pile foundation; the top of the internal support column 5 of the pile foundation tube has a section of equipment installation cavity 51 for installing equipment such as a controller; the axis of the internal support column 5 of the pile foundation tube is also provided with a second threading hole 52, and the bottom end of the second threading hole 52 is communicated with the first threading hole 13 at the bottom of the pile foundation tube 1. In addition, a third threading hole 34 is also provided at the axis of the pile foundation tube base 3, and the top of the third threading hole 34 is communicated with the bottom of the first threading hole 13. A temperature sensor 7 is embedded at the bottom of the pile foundation tube base 3, and then the cable of the temperature sensor 7 can be sequentially led through the third threading hole 34, the first threading hole 13 and the second threading hole 52 to the equipment installation cavity 51 at the top of the internal support column 5 of the pile foundation tube to connect with the controller.

[0038] Two holes 53 corresponding to the vertical grooves 14 are symmetrically arranged on the wall of the equipment installation inner cavity 51 of the supporting column 5 inside the pile foundation tube. When the supporting column 5 inside the pile foundation tube is embedded in the pile foundation tube 1, the vertical groove 14 forms a channel, and then the two holes 53 are respectively connected to the two vertical grooves 14 (i.e., channels) in a one-to-one correspondence; two heating rods 8 are symmetrically connected to the outer wall of the supporting column 5 inside the pile foundation tube through a hinged connector 81. The two heating rods 8 are respectively inserted and installed in the two grooves 151 of the pile foundation tube 1. The cross-sectional size of the heating rod 8 is smaller than the cross-sectional size of the groove 151 and the cross-sectional size of the vertical groove 14. Since the heating rod The top of 8 is hinged to the internal support column 5 of the pile foundation tube, so the heating rod 8 can be easily pulled out or inserted into the groove 151 (that is, in the process of pulling out or inserting the heating rod 8, the heating rod 8 can slide along the vertical groove 14 of the pile foundation tube 1 as the internal support column 5 of the pile foundation tube moves); in addition, a fourth horizontal threading hole (not shown in the figure) is also provided at a position corresponding to the top of the heating rod 8 on the internal support column 5 of the pile foundation tube, and the fourth threading hole is connected to the second threading hole 52 inside the internal support column 5 of the pile foundation tube, so that the cable of the heating rod 8 can be led into the equipment installation cavity 51 through the fourth threading hole and the second threading hole 52 in sequence.

[0039] See attached Figure 8 -Attached Fig. 9 The top blowing device 9 is arranged on the top of the pile foundation tube 1 (see Figure 1 ), the top blowing device 9 specifically includes an outer tube 91, a fan 92 and a fan driving motor 93. The outer tube 91 is fixedly installed on the top of the pile foundation tube 1, and the fan 92 and the fan driving motor 93 are located inside the outer tube 91. The fan 92 is connected to the fan driving motor 93 through a connecting shaft 94. A top cover 95 is arranged on the top of the outer tube 91, and a side ventilation pipe 96 is also arranged on the side wall of the outer tube 91. A filter plate 97 is installed at the port of the side ventilation pipe 96 to prevent external impurities from entering; the blowing direction of the fan 92 is downward, and when the fan driving motor 93 drives the fan 92 to rotate, the fan 92 blows air below it, and the airflow enters the groove 151 through the hole 53 and the vertical groove 14, thereby prompting the heat of the heating rod 8 in the groove 151 to better diffuse the arc tube 6 with the airflow, so as to fully dissipate the heat to the surrounding soil, effectively increase the temperature of the surrounding soil, and avoid excessive freezing and pulling effect caused by too low temperature.

[0040] A controller 55 is provided in the equipment installation cavity 51 , and the temperature sensor 7 , the heating rod 8 and the fan drive motor 93 are all electrically connected to the controller, and the controller automatically controls the heating rod 8 and the fan drive motor 93 to operate according to the detection data of the temperature sensor 7 .

[0041] Furthermore, the pile foundation cylinder top seat 2 and the transmission line tower connection frame 4 are to be installed on the cylinder wall of the pile foundation cylinder 1 below the equipment installation cavity 51 (see attached Figure 1 ), in this way, the support column 5 inside the pile foundation tube can ensure good supporting strength for the pile foundation tube 1 (since the equipment installation cavity 51 is a larger cavity structure, the strength here is weaker).

[0042] Furthermore, a solar panel 110 is installed on the top cover 95 of the top blowing device 9 to supply power to the internal electrical equipment of the present invention, and an external cable power supply may also be used.

[0043] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A transmission line tower base with electric heating blowing anti-freezing function suitable for frozen soil areas, characterized by: It includes a pile foundation cylinder, a pile foundation cylinder top seat, a pile foundation cylinder base, a transmission line tower connection frame, an internal support column of the pile foundation cylinder, an arc tube, an electric heating rod and a top blowing device; The top of the pile foundation cylinder is fixedly installed with the pile foundation cylinder top seat, and the transmission line pole tower connection frame is fixedly installed on the pile foundation cylinder top seat, and the transmission line pole tower connection frame is used to connect with the bottom support foot of the transmission line pole tower body; The pile foundation tube base is arranged at the bottom of the pile foundation tube, and a plurality of threaded drill rod assemblies are arranged on the pile foundation tube base to fix the pile foundation tube base to the foundation; The pile foundation tube has a hollow installation cavity inside, and the internal support column of the pile foundation tube is embedded in the installation cavity of the pile foundation tube; two vertical grooves are symmetrically arranged on the cavity wall of the installation cavity of the pile foundation tube, and two expanded diameter wing plates are symmetrically arranged on the outer tube wall of the lower part of the pile foundation tube, the two expanded diameter wing plates respectively correspond to the lower positions of the two vertical grooves, and an inclined groove is arranged in each expanded diameter wing plate, the top of the groove is connected with the bottom of the vertical groove, and a plurality of groups of installation through holes connected with the groove are symmetrically arranged on the front and back sides of each expanded diameter wing plate, and arc tubes are installed on the front and back sides of the two expanded diameter wing plates through the installation through holes, so that the grooves inside the two expanded diameter wing plates are connected with the arc tube; The top of the support column inside the pile foundation tube is provided with an inner cavity for equipment installation. Two holes corresponding to the vertical grooves are symmetrically arranged on the wall of the inner cavity for equipment installation of the support column inside the pile foundation tube, and the two holes are respectively connected with the two vertical grooves in a one-to-one correspondence; two heating rods are symmetrically connected to the outer wall of the support column inside the pile foundation tube through a hinged connector, and the two heating rods are respectively inserted and installed in the two grooves of the pile foundation tube, and the cross-sectional dimensions of the heating rods are smaller than the cross-sectional dimensions of the grooves and the cross-sectional dimensions of the vertical grooves; The top blowing device is arranged on the top of the pile foundation cylinder, and the top blowing device comprises an outer cylinder, a fan and a fan driving motor. The outer cylinder is fixedly installed on the top of the pile foundation cylinder, and the fan and the fan driving motor are located inside the outer cylinder. The fan is connected to the fan driving motor through a connecting shaft. A top cover is arranged on the top of the outer cylinder, and a side ventilation pipe is also arranged on the side wall of the outer cylinder. A filter plate is installed at the port of the side ventilation pipe. The pile foundation cylinder top seat and the power transmission line pole tower connecting frame are installed on the cylinder wall of the pile foundation cylinder below the equipment installation cavity.

2. The power transmission line tower base with electric heating air blowing and anti-freezing function suitable for frozen soil areas according to claim 1, characterized in that: The pile foundation cylinder is installed in the foundation. During construction, first, a foundation hole is excavated in the foundation, and then the pile foundation cylinder is installed into the foundation hole and backfilled.

3. The power transmission line tower base with electric heating air blowing and anti-freezing function suitable for frozen soil areas according to claim 1, characterized in that: The base of the pile foundation cylinder is in the shape of an inverted cone.

4. The power transmission line tower base with electric heating air blowing and anti-freezing function suitable for frozen soil areas according to claim 1, characterized in that: The threaded drill rod assembly includes a threaded barrel and a threaded drill rod. The threaded barrel is fixedly arranged on the base of the pile foundation barrel. The threaded drill rod is installed in the threaded barrel through threads. The threaded drill rod is used to drill into the foundation, so that the stability of the pile foundation barrel is better.

5. The transmission line tower base with electric heating air blowing and anti-freezing function suitable for frozen soil areas according to claim 1, characterized in that: A reduced diameter step is provided at the bottom of the installation cavity of the pile foundation tube, which is used to limit the lower limit installation position of the support column inside the pile foundation tube.

6. The power transmission line tower base with electric heating air blowing and anti-freezing function suitable for frozen soil areas according to claim 1, characterized in that: A first threading hole is vertically penetrated at the bottom of the pile foundation tube, a second threading hole is opened at the axis of the supporting column inside the pile foundation tube, the bottom end of the second threading hole is communicated with the first threading hole at the bottom of the pile foundation tube, and a third threading hole is also opened at the axis of the pile foundation tube base, the top of the third threading hole is communicated with the bottom of the first threading hole, a temperature sensor is embedded in the bottom of the pile foundation tube base, and the cable of the temperature sensor is led to the equipment installation inner cavity at the top of the supporting column inside the pile foundation tube through the third threading hole, the first threading hole and the second threading hole in sequence.

7. The power transmission line tower base with electric heating air blowing and anti-freezing function suitable for frozen soil areas according to claim 6, characterized in that: A fourth transverse threading hole is also provided on the internal support column of the pile foundation tube at a position corresponding to the top end of the heating rod. The fourth threading hole is connected to the second threading hole inside the internal support column of the pile foundation tube. The cable of the heating rod is led into the equipment installation cavity through the fourth threading hole and the second threading hole in turn.

8. The power transmission line tower base with electric heating air blowing and anti-freezing function suitable for frozen soil areas according to claim 6, characterized in that: A controller is arranged in the inner cavity of the equipment installation, and the temperature sensor, the heating rod and the fan driving motor are all electrically connected to the controller. The controller automatically controls the operation of the heating rod and the fan driving motor according to the detection data of the temperature sensor.

9. The power transmission line tower base with electric heating air blowing and anti-freezing function suitable for frozen soil areas according to claim 1, characterized in that: The fan blows air downward, and the air flow enters the slot through the hole and the vertical groove, causing the heat of the heating rod in the slot to diffuse through the arc tube along with the air flow, thereby fully dissipating the heat to the surrounding soil and increasing the temperature of the surrounding soil.

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