Portable distribution cable well fresh air device

Abstract

The invention discloses a portable power distribution cable well fresh air device, and relates to the technical field of cable well ventilation. According to the portable fresh air device for the power distribution cable well, the portable fresh air device is placed at the bottom of the cable well, one ends of two connecting pipes are placed outside the cable well, at the moment, a second motor is started to be matched with a first gear, a second gear, a connecting shaft, two first belt wheels, a transmission belt, two second belt wheels and a rotating shaft to drive two fan blades to rotate at a high speed; when the left fan blade rotates, the left fan blade is matched with the connecting pipe to feed external air into the shell and discharge the external air into the cable well, when the right fan blade rotates, the right fan blade is matched with the connecting pipe to discharge the deep part of the cable well to the outside to complete air exchange, and the air needs to be filtered through the filter plate when entering, so that the air in the deep part of the cable well is purified. And the influence on the body health of workers is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of cable well ventilation, and in particular to a portable fresh air device for a power distribution cable well. Background Art

[0002] A cable is an electrical energy or signal transmission device, usually composed of several or several groups of wires. A cable well is a container for loading cables. The cable inspection wells in the typical design of the existing distribution network of State Grid Corporation of China are sealed underground for a long time after they are built and put into operation, causing the deposition of harmful and toxic gases. When power operation and maintenance repair personnel enter the well to work, it will cause health damage or even death to the workers.

[0003] In the prior art, such as the Chinese patent number: CN115721887A, a portable distribution cable shaft fresh air device is disclosed, including a base, a fresh air fan is fixedly arranged on the base, a purification component is arranged at the air inlet on one side of the fresh air fan, a drive motor is connected to the other side of the fresh air fan, the drive motor is connected to a lithium battery pack, a fresh air hose is arranged at the air outlet on the upper part of the fresh air fan, and the other end of the fresh air hose is connected to a fresh air mask. The fresh air fan is driven by a lithium battery pack, which can be convenient for maintenance personnel to carry and use at the maintenance construction site, increase the convenience of carrying and operation, avoid breathing other harmful gases in the cable well, and endanger the safety of the workers underground. This solution drives the fresh air fan by a lithium battery pack, which can be convenient for maintenance personnel to carry and use at the maintenance construction site, increase the convenience of carrying and operation, and set an air detector and a gas rectifier on the fresh air hose, and connect a fresh air mask. Avoid breathing other harmful gases in the cable well, which endangers the safety of the workers underground.

[0004] Although the above patent can prevent the breathing of other harmful gases in the cable well and endanger the safety of the workers underground, the construction of the cable well usually requires multiple workers to work. If the harmful substances in the air deep in the cable well are not effectively removed, it is easy to affect the health after working for a long time.

[0005] Therefore, we propose a portable distribution cable well fresh air device to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to provide a portable distribution cable well fresh air device to solve the problem proposed in the above background technology that the construction of the cable well usually requires multiple workers to work. If the harmful substances in the air deep in the cable well are not effectively removed, it is easy to affect the health after long-term work.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a portable fresh air device for a power distribution cable well, comprising a shell, a filtering mechanism is arranged at a position near the top inside the shell, a shifting mechanism is arranged at a position near the top on the right side of the shell, a driving mechanism is arranged at a position near the bottom on the rear side of the shell, a connecting mechanism is arranged at the top of the shell, a second ventilation pipe is symmetrically fixedly connected to the outer surfaces of both sides of the shell near the bottom, and a first ventilation pipe is symmetrically fixedly connected to the top of the shell, the driving mechanism comprises a second motor, a connecting shaft and a rotating shaft, both ends of the connecting shaft are fixedly connected to a first pulley, the number of the rotating shafts is set to two, and fan blades are arranged at the right ends of the two rotating shafts, the outer surface of the rotating shaft is connected to a connecting frame via a first bearing, and the connecting frame is fixedly connected to the inner surface wall of the second ventilation pipe.

[0008] Furthermore, the left ends of the two rotating shafts are fixedly connected to a second pulley, a transmission belt is arranged between the outer surfaces of the second pulley and the first pulley, a second gear is fixedly connected at the center of the outer surface of the connecting shaft, the second motor is fixedly installed on the rear surface of the outer shell near the bottom, the output end of the second motor is fixedly connected to the first gear, and the first gear is meshingly connected to the second gear.

[0009] Furthermore, a first protective shell is fixedly connected to a position near the bottom of the rear surface of the shell, second protective shells are provided on both sides of the first protective shell, second bearings are embedded in the outer surfaces of both sides of the first protective shell, and the outer surface of the connecting shaft is connected to the inner walls of the two second bearings, the first protective shell and the second motor, the first gear and the second gear are matched, and the second protective shell and the transmission belt are matched.

[0010] Furthermore, a cover plate is fixedly mounted on the front surface of the shell, shoulder straps are symmetrically arranged on the front surface of the cover plate, and protective nets are arranged on the opposite end surfaces of the two second ventilation pipes.

[0011] Furthermore, the filtering mechanism comprises a mounting frame, which is hollowed out at the top and bottom, and has multiple sets of slide rails symmetrically arranged on the inner walls on both sides of the mounting frame, and a filter plate is slidably arranged between the inner walls of each set of the slide rails.

[0012] Furthermore, the displacement mechanism includes a first motor and two limit rods, the two limit rods are fixedly connected between the inner walls on both sides of the shell near the top, and the outer surfaces of the two limit rods slide through the outer surface of the mounting frame.

[0013] Furthermore, the first motor is fixedly installed on the right surface of the shell near the upper position, the output end of the first motor slides through the outer surface of the shell and extends to the other side, the output end of the first motor is fixedly connected with a threaded screw, and the left end of the threaded screw is rotatably connected to the left inner wall of the shell, and the outer surface thread of the threaded screw penetrates the outer surface of the mounting frame.

[0014] Furthermore, a partition plate is fixedly connected to the center of the inner bottom of the shell, the mounting frame and the partition plate are located correspondingly, and a connecting pipe is sleeved on the outside of the first ventilation pipe.

[0015] Furthermore, the connection mechanism comprises a fixing plate and a connecting plate, the front surface of the connecting plate is symmetrically fixedly connected with an insertion rod, and the outer surface of the insertion rod slides through the outer surface of the connecting pipe.

[0016] Furthermore, the fixing plate is fixedly connected to the top of the shell, a sliding rod is fixedly connected at the center of the front surface of the connecting plate, the outer surface of the sliding rod slides through the outer surface of the fixing plate and extends to the front side, a round block is fixedly connected to the front end of the sliding rod, a spring is connected between the rear surface of the round block and the front surface of the fixing plate, and the spring is sleeved on the outside of the sliding rod.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Place the equipment at the bottom of the cable well, and place one end of the two connecting pipes outside the cable well. At this time, by starting the second motor, the first gear, the second gear, the connecting shaft, the two first pulleys, the transmission belt, the two second pulleys and the rotating shaft can drive the two fan blades to rotate at high speed. The two fan blades are installed in reverse. When the left fan blade rotates, the connecting pipe is used to send external air into the outer shell and then discharged into the cable well. When the right fan blade rotates, the connecting pipe is used to discharge the air from the deep part of the cable well to the outside to complete the air exchange. When the air enters, it needs to be filtered through the filter plate to purify the air deep in the cable well to avoid affecting the health of the staff.

[0018] 2. When the air inside the cable well is purified, start the first motor to drive the threaded screw to rotate. At this time, the mounting frame will move to the right under the restriction of the limit rod. At this time, the air blown out by the fan blades on the right will flow from the bottom of the filter plate to the top, thereby blowing out part of the impurities accumulated on the top of the filter plate, reducing the replacement frequency of the filter plate and improving the practicability of the equipment.

[0019] 3. When the work is finished and the connecting pipe needs to be removed, when the round block is pushed, the sliding rod will push the connecting plate to the back, so that the plug rod is disengaged from the connecting pipe, releasing the fixation of the connecting pipe, and then the connecting pipe can be pulled out upwards. The installation steps are reversed, the connection is convenient, the operation difficulty is low, the applicability is high, and the shoulder strap design allows users to carry the equipment conveniently, which is convenient for short-distance transportation and adjustment of the position of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of a portable fresh air device for a power distribution cable well according to the present invention; Figure 2 A three-dimensional view of a portable fresh air device for a power distribution cable well according to the present invention from another angle; Figure 3 This is an expanded view of a portable fresh air device for a power distribution cable well of the present invention; Figure 4 This is a development view from another angle of a portable fresh air device for a power distribution cable well of the present invention; Figure 5 It is a partial structural schematic diagram of a portable fresh air device for a power distribution cable well of the present invention; Figure 6 This is a schematic structural diagram of a filtering mechanism of a portable fresh air device for a power distribution cable well according to the present invention; Figure 7 This is a structural schematic diagram of a driving mechanism of a portable fresh air device for a power distribution cable well of the present invention; Figure 8 It is a structural schematic diagram of a connection mechanism of a portable fresh air device for a power distribution cable well of the present invention.

[0021] In the figure: 1. Shell; 11. First ventilation pipe; 12. Connecting pipe; 13. Cover plate; 14. Shoulder strap; 15. Partition plate; 2. Second ventilation pipe; 21. Protective net; 22. First protective shell; 23. Second protective shell; 3. Filter mechanism; 301. Mounting frame; 302. Slide rail; 303. Filter plate; 4. Shifting mechanism; 401. First motor; 402. Threaded screw; 403. Limiting rod; 5. Driving mechanism; 501. Second motor; 502. First gear; 503. Second gear; 504. Connecting shaft; 505. First pulley; 506. Second pulley; 507. Transmission belt; 508. Rotating shaft; 509. Connecting frame; 510. Fan blade; 6. Connecting mechanism; 601. Fixed plate; 602. Slide rod; 603. Round block; 604. Spring; 605. Connecting plate; 606. Insert rod. DETAILED DESCRIPTION

[0022] 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 implementation regulations described 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.

[0023] See also Figure 1-Figure 8 The present invention provides a technical solution: a portable fresh air device for a power distribution cable well, comprising a shell 1, a filtering mechanism 3 is arranged near the top of the inside of the shell 1, a shifting mechanism 4 is arranged near the top of the right side of the shell 1, a driving mechanism 5 is arranged near the bottom of the rear side of the shell 1, a connecting mechanism 6 is arranged at the top of the shell 1, and a second ventilation pipe 2 is symmetrically fixedly connected to the outer surfaces of both sides of the shell 1 near the bottom, and a first ventilation pipe 11 is symmetrically fixedly connected to the top of the shell 1. The driving mechanism 5 comprises a second motor 501, a connecting shaft 504 and a rotating shaft 508, both ends of the connecting shaft 504 are fixedly connected to a first pulley 505, the number of the rotating shafts 508 is set to two, and the right ends of the two rotating shafts 508 are respectively provided with fan blades 510, and the outer surface of the rotating shaft 508 is connected to a connecting frame 509 through a first bearing, and the connecting frame 509 is fixedly connected to the inner surface wall of the second ventilation pipe 2.

[0024] like Figure 3 and Figure 7 As shown, the left ends of the two rotating shafts 508 are fixedly connected to the second pulley 506, and a transmission belt 507 is arranged between the outer surfaces of the second pulley 506 and the first pulley 505. The center of the outer surface of the connecting shaft 504 is fixedly connected to the second gear 503. The second motor 501 is fixedly installed on the rear surface of the housing 1 near the bottom. The output end of the second motor 501 is fixedly connected to the first gear 502. The first gear 502 and the second gear 503 are meshed and connected. When the second motor 501 is started, the first gear 502 can be driven to rotate. , and the first gear 502 and the second gear 503 are meshed, so the second gear 503 will follow the rotation and drive the connecting shaft 504 to rotate. When the connecting shaft 504 rotates, the first pulleys 505 at both ends rotate at the same time. At this time, under the action of the transmission belt 507, the two second pulleys 506 are driven to rotate synchronously. When the second pulley 506 rotates, the fan blade 510 connected to it through the rotating shaft 508 will rotate at high speed, and the two fan blades 510 are installed in opposite directions, so one delivers air to the inside of the shell 1, and the other delivers air to the outside of the shell 1.

[0025] like Figure 1-Figure 5 and Figure 7As shown, a first protective shell 22 is fixedly connected to a position near the bottom of the rear surface of the housing 1, and second protective shells 23 are provided on both sides of the first protective shell 22. Second bearings are embedded in the outer surfaces of both sides of the first protective shell 22, and the outer surface of the connecting shaft 504 is connected to the inner surface walls of the two second bearings. The first protective shell 22 and the second motor 501, the first gear 502 and the second gear 503 are matched in position, the second protective shell 23 and the transmission belt 507 are matched in position, and the connecting shaft 504 is installed on the first protective shell 22 through the second bearings. It can rotate smoothly. The first protective shell 22 is provided to shield the second motor 501, the first gear 502 and the second gear 503, and the second protective shell 23 prevents the transmission belt 507 from being blocked, thereby effectively avoiding the problem of injuries to people when the first gear 502, the second gear 503 and the transmission belt 507 are working, thereby improving the safety of the device. At the same time, because the first gear 502, the second gear 503 and the transmission belt 507 are in a sealed space, damage caused by foreign objects being released from them is avoided, thereby improving the service life of the equipment.

[0026] like Figure 1-Figure 5 As shown, a cover plate 13 is fixedly installed on the front surface of the shell 1, and shoulder straps 14 are symmetrically arranged on the front surface of the cover plate 13. The opposite end surfaces of the two second ventilation pipes 2 are provided with protective nets 21. The cover plate 13 is provided to seal the shell 1, and the shoulder straps 14 are provided to facilitate the staff to carry the equipment. The protective net 21 is provided to shield the fan blades 510, thereby improving safety.

[0027] like Figure 4 and Figure 6 As shown, the filtering mechanism 3 includes a mounting frame 301, which is hollowed out from top to bottom. A plurality of groups of slide rails 302 are symmetrically arranged on the inner walls on both sides of the mounting frame 301. A filter plate 303 is slidably arranged between the inner walls of each group of slide rails 302. The mounting frame 301 is arranged to cooperate with the internal slide rails 302 to install the filter plate 303. The filter plate 303 can be made of different materials according to actual conditions, and is mainly used to filter the air entering the cable well.

[0028] like Figure 4 and Figure 6 As shown, the shift mechanism 4 includes a first motor 401 and two limit rods 403. The two limit rods 403 are fixedly connected between the inner walls on both sides of the shell 1 near the top. The outer surfaces of the two limit rods 403 slide through the outer surface of the mounting frame 301. The limit rods 403 are mainly used to support the mounting frame 301 and limit it so that it can only slide left and right.

[0029] like Figure 4 and Figure 6As shown, the first motor 401 is fixedly installed on the right surface of the shell 1 near the upper position, and the output end of the first motor 401 slides through the outer surface of the shell 1 and extends to the other side. The output end of the first motor 401 is fixedly connected with a threaded screw 402, and the left end of the threaded screw 402 is rotatably connected to the left inner wall of the shell 1. The outer surface thread of the threaded screw 402 penetrates the outer surface of the mounting bracket 301. When the first motor 401 is started, the threaded screw 402 is driven to rotate, thereby driving the mounting bracket 301 to move left and right inside the shell 1, thereby achieving the purpose of adjusting the position of the filter plate 303.

[0030] like Figure 1-Figure 5 As shown, a partition plate 15 is fixedly connected to the center of the inner bottom of the outer shell 1, and the positions of the mounting frame 301 and the partition plate 15 correspond to each other. A connecting pipe 12 is provided on the outside of the first ventilation pipe 11. When the mounting frame 301 moves to the far left or far right, its bottom fits with the top of the partition plate 15, thereby playing the role of dividing the interior of the outer shell 1 on the left side to form two air channels. The connecting pipe 12 is made of a telescopic hose material and is relatively long. One end is connected to the first ventilation pipe 11 on the device, and the other end is fixed on the ground outside the cable well, thereby connecting the outside air with the air inside the cable well.

[0031] like Figure 1-Figure 4 and Figure 8 As shown, the connecting mechanism 6 includes a fixing plate 601 and a connecting plate 605. The front surface of the connecting plate 605 is symmetrically fixedly connected with an insert rod 606. The outer surface of the insert rod 606 slides through the outer surface of the connecting tube 12. After the connecting tube 12 is sleeved on the outside of the first ventilation tube 11, the insert rod 606 is used to pass through the connecting tube 12 to limit it and prevent it from falling off.

[0032] like Figure 1-Figure 4 and Figure 8 As shown, the fixing plate 601 is fixedly connected to the top of the shell 1, and a sliding rod 602 is fixedly connected to the center of the front surface of the connecting plate 605. The outer surface of the sliding rod 602 slides through the outer surface of the fixing plate 601 and extends to the front side. The front end of the sliding rod 602 is fixedly connected to a round block 603, and a spring 604 is connected between the rear surface of the round block 603 and the front surface of the fixing plate 601. The spring 604 is sleeved on the outside of the sliding rod 602. When the round block 603 is pushed, the sliding rod 602 will push the connecting plate 605 to the rear side, so that the insertion rod 606 is disengaged from the connecting tube 12, releasing the fixation of the connecting tube 12. After the round block 603 is released, the squeezed and contracted spring 604 rebounds and pushes the round block 603 to move to the front side. At this time, the sliding rod 602 drives the connecting plate 605 to reset, so that the insertion rod 606 is inserted into the connecting tube 12 for fixation. This design makes the connecting tube 12 and the device quickly and conveniently disassembled and assembled, and convenient to use.

[0033] The use method and working principle of this device: when the staff needs to work under the cable well, the equipment is placed at the bottom of the cable well through ropes and other equipment, and one end of the two connecting pipes 12 is placed outside the cable well. At this time, the second motor 501 is started to drive the first gear 502 to rotate, thereby driving the second gear 503 to rotate. At this time, the connecting shaft 504 drives the two first pulleys 505 to rotate, and drives the two second pulleys 506 to rotate under the action of the transmission belt 507. When the second pulley 506 rotates, it drives the rotating shaft 508 and the fan blades 510 to rotate at high speed, and the two fan blades 510 are installed in reverse. When the left fan blade 510 rotates, the external air is sucked into the inside of the outer shell 1 through the left connecting pipe 12 and then discharged from the left second ventilation pipe 2. When the right fan blade 510 rotates, the air deep in the cable well is discharged into the inside of the outer shell 1 and discharged to the outside through the right connecting pipe 12, completing the air exchange, and the air needs to be filtered through the filter plate 303 in the mounting frame 301 when entering. Thereby, the air deep in the cable well is purified to avoid affecting the health of the workers. After the air inside the cable well is purified, the first motor 401 is started to drive the threaded screw 402 to rotate. At this time, the mounting frame 301 will move to the right under the restriction of the limit rod 403. At this time, the air blown out by the fan blade 510 on the right flows from the bottom of the filter plate 303 to the top, so that a part of the impurities accumulated on the top of the filter plate 303 can be blown out, reducing the replacement frequency of the filter plate 303 and improving the practicality of the device. When the connecting pipe 12 needs to be removed after the work is completed, when the round block 603 is pushed, the sliding rod 602 will push the connecting plate 605 to the rear side, so that the insertion rod 606 is disengaged from the connecting pipe 12, the fixing of the connecting pipe 12 is released, and then the connecting pipe 12 can be pulled out upward. The installation steps are opposite, the connection is convenient, the operation difficulty is low, and the applicability is high. In addition, through the design of the shoulder strap 14, the user can easily carry the device on his back, which is convenient for short-distance transportation and adjustment of the position of the device.

[0034] The wiring diagram of the first motor 401 and the second motor 501 in the present invention is common knowledge in the art, and its working principle is a well-known technology. The model is selected according to the actual use, so the control method and wiring arrangement of the first motor 401 and the second motor 501 are not explained in detail.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable fresh air device for a power distribution cable well, comprising a housing (1), characterized in that: A filtering mechanism (3) is arranged near the top of the interior of the shell (1), a shifting mechanism (4) is arranged near the top of the right side of the shell (1), a driving mechanism (5) is arranged near the bottom of the rear side of the shell (1), a connecting mechanism (6) is arranged at the top of the shell (1), second ventilation pipes (2) are symmetrically fixedly connected to the outer surfaces of both sides of the shell (1) near the bottom, and a first ventilation pipe (11) is symmetrically fixedly connected to the top of the shell (1); The driving mechanism (5) comprises a second motor (501), a connecting shaft (504) and a rotating shaft (508); both ends of the connecting shaft (504) are fixedly connected to a first pulley (505); the number of the rotating shafts (508) is set to two; the right ends of the two rotating shafts (508) are both provided with fan blades (510); the outer surface of the rotating shaft (508) is connected to a connecting frame (509) via a first bearing; the connecting frame (509) is fixedly connected to the inner surface wall of the second ventilation pipe (2).

2. A portable fresh air device for distribution cable well according to claim 1, characterized in that: The left ends of the two rotating shafts (508) are fixedly connected to a second pulley (506); a transmission belt (507) is provided between the outer surfaces of the second pulley (506) and the first pulley (505); a second gear (503) is fixedly connected to the center of the outer surface of the connecting shaft (504); the second motor (501) is fixedly mounted on a rear surface of the housing (1) near the bottom; the output end of the second motor (501) is fixedly connected to a first gear (502); and the first gear (502) and the second gear (503) are meshingly connected.

3. A portable fresh air device for distribution cable well according to claim 2, characterized in that: A first protective shell (22) is fixedly connected to a position near the bottom of the rear surface of the housing (1); second protective shells (23) are arranged on both sides of the first protective shell (22); second bearings are embedded in the outer surfaces of both sides of the first protective shell (22); the outer surface of the connecting shaft (504) is connected to the inner surface walls of the two second bearings; the first protective shell (22) and the second motor (501), the first gear (502) and the second gear (503) are matched in position; and the second protective shell (23) and the transmission belt (507) are matched in position.

4. A portable fresh air device for distribution cable well according to claim 3, characterized in that: A cover plate (13) is fixedly mounted on the front surface of the housing (1), shoulder straps (14) are symmetrically arranged on the front surface of the cover plate (13), and protective nets (21) are arranged on the opposite end surfaces of the two second ventilation pipes (2).

5. A portable fresh air device for distribution cable well according to claim 4, characterized in that: The filtering mechanism (3) comprises a mounting frame (301), the mounting frame (301) being hollowed out at the top and bottom, a plurality of groups of slide rails (302) being symmetrically arranged on the inner surface walls on both sides of the mounting frame (301), and a filtering plate (303) being slidably arranged between the inner surface walls of each group of the slide rails (302).

6. A portable fresh air device for distribution cable well according to claim 5, characterized in that: The shift mechanism (4) comprises a first motor (401) and two limit rods (403), wherein the two limit rods (403) are fixedly connected between the inner walls on both sides of the housing (1) at a position close to the top, and the outer surfaces of the two limit rods (403) slide through the outer surface of the mounting frame (301).

7. A portable fresh air device for distribution cable well according to claim 6, characterized in that: The first motor (401) is fixedly mounted on the right surface of the housing (1) at a position close to the top; the output end of the first motor (401) slides through the outer surface of the housing (1) and extends to the other side; the output end of the first motor (401) is fixedly connected to a threaded screw (402); the left end of the threaded screw (402) is rotatably connected to the left inner wall of the housing (1); the outer surface of the threaded screw (402) is threadedly penetrated through the outer surface of the mounting frame (301).

8. A portable fresh air device for distribution cable well according to claim 7, characterized in that: A partition plate (15) is fixedly connected to the center of the inner bottom of the outer shell (1), the mounting frame (301) and the partition plate (15) are located in corresponding positions, and a connecting pipe (12) is sleeved on the outside of the first ventilation pipe (11).

9. A portable fresh air device for distribution cable well according to claim 8, characterized in that: The connection mechanism (6) comprises a fixing plate (601) and a connection plate (605); the front surface of the connection plate (605) is symmetrically fixedly connected with an insertion rod (606); the outer surface of the insertion rod (606) slides through the outer surface of the connection tube (12).

10. A portable fresh air device for distribution cable well according to claim 9, characterized in that: The fixing plate (601) is fixedly connected to the top of the housing (1); a sliding rod (602) is fixedly connected to the center of the front surface of the connecting plate (605); the outer surface of the sliding rod (602) slides through the outer surface of the fixing plate (601) and extends to the front side; a round block (603) is fixedly connected to the front end of the sliding rod (602); a spring (604) is connected between the rear surface of the round block (603) and the front surface of the fixing plate (601); and the spring (604) is sleeved on the outside of the sliding rod (602).

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