Air duct explosion-proof electric heater

Abstract

The invention relates to the technical field of electric heaters, in particular to an air duct explosion-proof type electric heater which comprises a barrel, a heating structure, a leveling structure, a moving structure, a height adjusting structure, an air inlet structure, a dustproof structure and an opening and closing structure. The leveling structures are arranged to conveniently adjust the heights of the four corners of the electric heater, so that the electric heater is kept in a horizontal state, the stability is improved, and the height adjusting structures and the moving structures are arranged to conveniently and rapidly adjust the horizontal position and the vertical height of the whole electric heater. The air outlet and the air duct opening of the electric heater can be guaranteed to be flush with each other during installation, the installation efficiency is improved, the filter screen can be rapidly installed and detached through the dustproof structure, the operation efficiency is high, and the opening and closing state of the air outlet can be flexibly controlled through the opening and closing structure. When the electric heater is not installed, dust, sundries and the like can be effectively prevented from entering the cylinder, and the protection capacity is high.

Description

Technical Field

[0001] The present invention relates to the technical field of electric heaters, and specifically to an air duct explosion-proof electric heater. Background Art

[0002] An air duct electric heater is a device used to heat the air in the air duct, and is often applied in fields such as industry, mining, heating, ventilation, and air conditioning. Among them, in places with explosion hazards such as coal mines and metal mines, an explosion-proof electric heater is often borrowed to heat the air in the mine, prevent equipment from malfunctioning due to freezing at low temperatures, improve the working environment of miners, ensure the ventilation safety of the mine, and at the same time avoid explosion accidents in an environment with flammable and explosive gases or dust.

[0003] When installing traditional electric heaters, the whole is usually directly fixed to the ground through the angle steel at the bottom, and at the same time, bolts are used to fix the air outlet of the electric heater to the air duct opening. However, when designing the air duct opening, it needs to match the air flow distribution in the air duct to make the air flow evenly. Therefore, the positions of the air duct openings of different air ducts are not fixed, and the installation personnel need to adjust the position of the electric heater according to the actual situation on site to accurately dock the air outlet with the air duct opening. Usually, steel plates are padded at the bottom of the angle steel to adjust the height of the electric heater, and its horizontal position is adjusted by multiple people assisting in pushing. The volume of the electric heater is usually large, so it is not convenient to lift or carry, the operation process is cumbersome, and the installation efficiency is low;

[0004] When the electric heater is in operation, the air is usually heated by the heating components inside the device, and then the cold air continuously flows to the electric heating elements by the fan at the end. However, there are a large amount of dust in the coal mine underground environment. To avoid affecting the heat transfer efficiency of the heating pipe and the subsequent cleaning difficulty due to dust accumulation, a dust-proof net is usually fixed to the fan with bolts. Therefore, when disassembling and cleaning, the bolts need to be repeatedly tightened and disassembled, and the operation efficiency is low and the flexibility is poor;

[0005] When storing or transporting the electric heater, since the air outlet of the electric heater is not connected to the air duct opening, it is usually directly exposed to the outside, so dust and sundries are likely to enter the inside of the air duct and accumulate on components such as the heating components and the fan, affecting the heat dissipation effect of the heating pipe, and at the same time accelerating the wear of components such as the fan, shortening the service life of the equipment, and having poor practicability. Summary of the Invention

[0006] In view of the problems in the prior art, the present invention provides an air duct explosion-proof electric heater.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: an air duct explosion-proof electric heater, which includes a cylinder body, a leveling structure arranged at the bottom of the cylinder body, a moving structure connected to the leveling structure, a height-adjusting structure cooperating with the moving structure, an air intake structure installed on the height-adjusting structure, a dust-proof structure arranged on the air intake structure, and an opening and closing structure arranged on the cylinder body;

[0008] The moving structure includes guide rods and two first sliding plates slidably connected to the guide rods. There are two guide rods on the leveling structure, and two second sliding plates are slidably connected to the two guide rods. The height-adjusting structure is cooperated on the first sliding plate. The height-adjusting structure includes a base and a rotating rod rotatably connected to the base. Bases are fixedly connected to both ends of the first sliding plate and the second sliding plate. A top seat is arranged on the rotating rod, and an installation frame is fixedly connected between the four top seats. The top of the rotating rod is rotatably connected to the top seat. Connecting rods are rotatably connected to the four bases near the outside, and the connecting rods are rotatably connected to the central position of the rotating rod.

[0009] Specifically, a support beam is slidably connected between the two guide rods. A hydraulic rod is fixedly connected to the support beam. The telescopic end of the hydraulic rod is fixedly connected to the adjacent second sliding plate. A connecting plate is fixedly connected between the first sliding plate near the outside and the second sliding plate near the inside.

[0010] Specifically, the leveling structure includes a support frame and support rods slidably connected to the four corners of the support frame. A support frame is arranged at the bottom of the cylinder body. An installation plate is fixedly connected to the bottom of the support rod. A nut is threadedly connected to the central position of the support rod. The top surface of the nut abuts against the outer wall of the support frame.

[0011] Specifically, a load-bearing beam is slidably connected between two adjacent support rods. An installation frame abuts between the two load-bearing beams. Another nut is threadedly connected to the top of the support rod. The top surface of the nut abuts against the outer wall of the load-bearing beam.

[0012] Specifically, two guide rods are fixedly connected to the support frame. One end of the support frame near the second sliding plate is rotatably connected to a lead screw. The lead screw is threadedly connected to the second sliding plate near the outside. The lead screw penetrates through the second sliding plate located inside. The end of the lead screw is threadedly connected to the support beam. The lead screw is threadedly connected to the first sliding plate located inside. The other end of the lead screw is fixedly connected to a handle. A cylinder body is fixedly connected to the installation frame.

[0013] Specifically, a heating structure is installed on the cylinder body. The heating structure includes a junction box and a plurality of heating tubes fixedly connected to the bottom of the junction box. Two junction boxes are fixedly connected to the top of the cylinder body. An air outlet is fixedly connected to one end of the cylinder body.

[0014] Specifically, the air intake structure includes a connecting frame and a wind tube fixedly connected to the connecting frame. The end of the mounting frame is fixedly connected with the connecting frame. One end of the wind tube is fixedly connected to the cylinder body. A support plate is fixedly connected to the inner wall of the wind tube. A first motor is fixedly connected to the support plate. A fan blade is fixedly connected to the output shaft of the first motor.

[0015] Specifically, the dust-proof structure includes a mounting frame and two limiting grooves formed inside the mounting frame. The other end of the wind tube is fixedly connected with the mounting frame. Two inlets are formed in the mounting frame. The inlets communicate with the limiting grooves. A dust-proof net is snap-fitted on the outer side of the mounting frame. Two docking blocks are rotatably connected to the dust-proof net. One end of the docking block is fixedly connected with a knob. A torsion spring is fixedly connected between the inner side of the knob and the dust-proof net. The other end of the docking block abuts against the inner wall of the limiting groove. A push plate is slidably connected inside the limiting groove. A first spring is fixedly connected between the push plate and the inner wall of the limiting groove. The docking block abuts against the push plate.

[0016] Specifically, a second motor is fixedly connected to the outer side of the dust-proof net. The output shaft of the second motor is rotatably connected to the dust-proof net. A brush is fixedly connected to the output shaft of the second motor. The brush is slidably connected to the inner side of the dust-proof net. The docking block is in a "T" - shaped structure.

[0017] Specifically, the opening and closing structure includes a docking port and two rotating shafts rotatably connected to the docking port. The docking port is fixedly connected to the air outlet. A sealing plate is fixedly connected to the rotating shaft. The sealing plate is slidably connected to the inner wall of the docking port. A gear is fixedly connected to the bottom end of the rotating shaft. A protective shell is fixedly connected to the outer wall of the docking port. A rack is slidably connected to the inner wall of the docking port. The rack meshes with the gear. The other end of the rack is slidably connected to the inner wall of the protective shell. A guiding strip is fixedly connected to the inner wall of the protective shell. A connecting block is fixedly connected to the rack. The connecting block is slidably connected to the guiding strip. A second spring is fixedly connected between the connecting block and the outer wall of the protective shell.

[0018] The beneficial effects of the present invention are:

[0019] (1) For the air duct explosion - proof electric heater of the present invention, a leveling structure is provided at the bottom of the cylinder body. The setting of the leveling structure facilitates adjusting the heights of the four corners of the electric heater respectively, so that the electric heater maintains a horizontal state and improves stability.

[0020] (2) In the air duct explosion-proof electric heater of the present invention, a moving structure is installed on the leveling structure 3, and the moving structure is used in cooperation with the height-adjusting structure. The settings of the height-adjusting structure and the moving structure facilitate the quick adjustment of the overall horizontal position and vertical height of the electric heater, and facilitate ensuring that the air outlet of the electric heater is flush with the air duct opening during installation, thereby improving the installation efficiency.

[0021] (3) In the air duct explosion-proof electric heater of the present invention, an air intake structure is installed on the cylinder body, and a dust-proof structure is provided on the air intake structure. The setting of the dust-proof structure facilitates the quick installation and disassembly of the filter screen, with high operating efficiency.

[0022] (4) In the air duct explosion-proof electric heater of the present invention, a heating structure is installed on the cylinder body, and an opening and closing structure is connected to the heating structure. The setting of the opening and closing structure facilitates the flexible control of the opening and closing state of the air outlet. When the electric heater is not installed, it can effectively prevent dust, sundries, etc. from entering the interior of the cylinder body, with strong protection ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the drawings and embodiments.

[0024] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the air duct explosion-proof electric heater provided by the present invention;

[0025] Figure 2 It is Figure 1 The enlarged schematic diagram of the structure of part A shown;

[0026] Figure 3 It is a schematic diagram of the connection structure between the junction box and the heating tube of the present invention;

[0027] Figure 4 It is a schematic diagram of the connection structure between the support frame and the support rod of the present invention;

[0028] Figure 5 It is a schematic diagram of the connection structure between the support frame and the guide rod of the present invention;

[0029] Figure 6 It is a schematic diagram of the connection structure between the cylinder body and the air duct of the present invention;

[0030] Figure 7 It is Figure 6 The enlarged schematic diagram of the structure of part B shown;

[0031] Figure 8 It is a schematic diagram of the connection structure between the air duct and the dust-proof net of the present invention;

[0032] Figure 9 It is a schematic diagram of the connection structure between the connecting frame and the air duct of the present invention;

[0033] Figure 10 Schematic diagram of the connection structure between the air outlet and the docking port of the present invention;

[0034] Figure 11 is Figure 10 Enlarged schematic diagram of the structure of part C shown in the figure.

[0035] In the figure: 1, cylinder body; 2, heating structure; 201, junction box; 202, heating pipe; 203, air outlet; 3, leveling structure; 301, support frame; 302, support rod; 303, mounting plate; 304, nut; 305, load-bearing beam; 4, moving structure; 401, guide rod; 402, first sliding plate; 403, second sliding plate; 404, lead screw; 405, handle; 406, support beam; 5, height-adjusting structure; 501, base; 502, rotating rod; 503, top seat; 504, connecting rod; 505, hydraulic rod; 506, connecting plate; 507, mounting frame; 6, air intake structure; 601, connecting frame; 602, air duct; 603, support plate; 604, first motor; 605, fan blade; 7, dust-proof structure; 701, mounting frame; 702, limiting groove; 703, inlet; 704, push plate; 705, first spring; 706, dust-proof net; 707, docking block; 708, knob; 709, torsion spring; 710, second motor; 711, brush; 8, opening and closing structure; 801, docking port; 802, rotating shaft; 803, sealing plate; 804, gear; 805, rack; 806, connecting block; 807, guide bar; 808, second spring; 809, protective shell. Specific embodiments

[0036] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0037] Such as Figure 1 , Figure 2 , Figure 4 and Figure 5As shown in the figure, an air duct explosion-proof electric heater according to the present invention includes a cylinder body 1, a leveling structure 3 provided at the bottom of the cylinder body 1, a moving structure 4 connected to the leveling structure 3, a height-adjusting structure 5 cooperating with the moving structure 4, an air inlet structure 6 installed on the height-adjusting structure 5, a dust-proof structure 7 provided on the air inlet structure 6, and an opening and closing structure 8 provided on the cylinder body 1; the moving structure 4 includes guide rods 401 and two first sliding plates 402 slidably connected to the guide rods 401. Two guide rods 401 are provided on the leveling structure 3, and two second sliding plates 403 are slidably connected to the two guide rods 401. The height-adjusting structure 5 is cooperated with the first sliding plates 402. Two guide rods 401 are fixedly connected to the support frame 301. One end of the support frame 301 close to the second sliding plate 403 is rotatably connected to a lead screw 404. The lead screw 404 is threadedly connected to the second sliding plate 403 near the outside. The lead screw 404 penetrates through the second sliding plate 403 located inside. The end of the lead screw 404 is threadedly connected to the support beam 406. The lead screw 404 is threadedly connected to the first sliding plate 402 located inside. The other end of the lead screw 404 is fixedly connected to a handle 405. The cylinder body 1 is fixedly connected to the mounting frame 507; after adjusting the docking port 801 of the electric heater to the same height as the air duct opening, it is also necessary to adjust the front and rear positions of the electric heater so that the docking port 801 abuts against and docks with the air duct opening, which is convenient for subsequent fixing of the two by bolts. Just rotate the handle 405 at the end of the support frame 301. The handle 405 drives the lead screw 404 to rotate on the support frame 301. Since the lead screw 404 is threadedly connected to the second sliding plate 403 on the outside, the support beam 406, and the first sliding plate 402 on the inside respectively, the lead screw 404 drives the three to move simultaneously. Since the support beam 406 is connected to the second sliding plate 403 on the inside through a hydraulic rod 505, and the second sliding plate 403 on the inside is connected to the first sliding plate 402 on the outside through a connecting plate 506, it is ensured that the two first sliding plates 402 and the two second sliding plates 403 move simultaneously, avoiding the problem of the height change of the electric heater caused by the change of the angle between the rotating rod 502 and the connecting rod 504. At this time, the horizontal position of the electric heater can be effectively adjusted, which is beneficial to the docking of the docking port 801 of the electric heater with the air duct opening, and the adjustment efficiency of the position of the electric heater is high.

[0038] Specifically, as Figure 1 、 Figure 2 、 Figure 4 and Figure 5As shown in the figure, the height adjustment structure 5 includes a base 501 and a rotating rod 502 rotatably connected to the base 501. Both ends of the first slide plate 402 and the second slide plate 403 are fixedly connected to the base 501. A top seat 503 is provided on the rotating rod 502. An installation frame 507 is fixedly connected between the four top seats 503. The top end of the rotating rod 502 is rotatably connected to the top seat 503. A connecting rod 504 is rotatably connected to each of the four bases 501 near the outside. The connecting rod 504 is rotatably connected to the central position of the rotating rod 502. A support beam 406 is slidably connected between the two guide rods 401. A hydraulic rod 505 is fixedly connected to the support beam 406. The telescopic end of the hydraulic rod 505 is fixedly connected to the adjacent second slide plate 403. A connecting plate 506 is fixedly connected between the first slide plate 402 near the outside and the second slide plate 403 near the inside; after adjusting the level of the support frame 301, the installer needs to adjust the horizontal position and vertical height of the electric heater according to the actual situation on site, so as to ensure that the docking port 801 on the electric heater is flush with the air duct opening. When adjusting the vertical height of the electric heater, through the hydraulic rod 505 installed on the support beam 406, the hydraulic rod 505 drives the second slide plate 403 located inside to slide outward along the guide rod 401. The second slide plate 403 drives the first slide plate 402 located outside to slide in the direction of the extension of the telescopic end of the hydraulic rod 505 through the connecting plate 506. At this time, since the other second slide plate 403 and the first slide plate 402 are both threadedly connected to the lead screw 404, the second slide plate 403 and the first slide plate 402 will not move. The second slide plate 403 connected to the hydraulic rod 505 drives the bases 501 at both ends to move in the direction of the other second slide plate 403. At the same time, the base 501 on the first slide plate 402 located outside slides in the direction of the other first slide plate 402, so that the angle between the rotating rod 502 and the connecting rod 504 gradually decreases, and the connection between them rotates. At this time, the top ends of the four rotating rods 502 move upward simultaneously. Since the top end of the rotating rod 502 is rotatably connected to the top seat 503 at the bottom of the installation frame 507, the installation frame 507 is driven to maintain a horizontal state and move upward until the docking port 801 on the electric heater is flush with the air duct opening. At this time, the height of the electric heater is quickly adjusted, solving the problem that it is difficult to move the electric heater due to its large volume and improving the installation efficiency.

[0039] Specifically, as Figure 1 、 Figure 2 、 Figure 4 and Figure 5As shown in the figure, the leveling structure 3 includes a support frame 301 and support rods 302 slidably connected to the four corners of the support frame 301. The bottom of the cylinder 1 is provided with the support frame 301. The bottom of the support rod 302 is fixedly connected with a mounting plate 303. A nut 304 is threadedly connected to the central position of the support rod 302. The top surface of the nut 304 abuts against the outer wall of the support frame 301. A load-bearing beam 305 is slidably connected between two adjacent support rods 302. An installation frame 507 abuts between the two load-bearing beams 305. Another nut 304 is threadedly connected to the top end of the support rod 302. The top surface of the nut 304 abuts against the outer wall of the load-bearing beam 305; the equipment is transported to the designated position and installed. When installing, it is necessary to align the docking port 801 at the end of the cylinder 1 with the reserved air duct opening on the air duct. First, the equipment is transported to a position near the air duct opening. If the ground at the installation location is sloping or uneven, only the support rods 302 at the four corners of the bottom support frame 301 need to be adjusted respectively. If it is necessary to adjust the length of the support rod 302 downward, by rotating the nut 304 at the central position of the support rod 302, the nut 304 can be moved upward along the support rod 302, so that the support rod 302 drives the mounting plate 303 at the bottom to move downward. Then, the support rods 302 and nuts 304 at the other three corners are adjusted respectively until the support frame 301 is kept horizontal with the ground, so that the heater can be accurately docked with the air duct, avoiding deviation and dislocation in the connection between the inlet and outlet and the air duct, enhancing stability. Then, the nuts 304 at the four corners of the support rods 302 are rotated respectively, and the load-bearing beams 305 at both ends are slid upward along the support rods 302 until the top surfaces of the two load-bearing beams 305 abut against the ground of the installation frame 507. Then, the position of the nut 304 is adjusted, and the load-bearing beam 305 is limited by the nut 304. At this time, the load-bearing beam 305 plays a supporting role for the installation frame 507 and the electric heater, avoiding deformation of the rotating rod 502, the connecting rod 504 and their connection parts under long-term heavy pressure, and having strong practicability.

[0040] Specifically, as Figure 1 , Figure 3 , Figure 6 and Figure 10As shown, a heating structure 2 is installed on the cylinder body 1. The heating structure 2 includes a junction box 201 and a plurality of heating tubes 202 fixedly connected to the bottom of the junction box 201. Two junction boxes 201 are fixedly connected to the top end of the cylinder body 1, and an air outlet 203 is fixedly connected to one end of the cylinder body 1. After the first motor 604 runs stably, the heating element of the electric heater is started through the control device. After the heating tubes 202 located at the bottom of the junction box 201 are powered on, they start to heat up, heating the air inside the cylinder body 1 to the set temperature, and then blowing it into the inside of the air duct through the docking port 801 on the air outlet 203, preventing the equipment from malfunctioning due to freezing at low temperatures, improving the working environment of miners, ensuring the ventilation safety of the mine, and being easy to operate.

[0041] Specifically, as Figure 1 and Figures 6 - 9 shown, the air intake structure 6 includes a connecting frame 601 and an air duct 602 fixedly connected to the connecting frame 601. The connecting frame 601 is fixedly connected to the end of the mounting frame 507. One end of the air duct 602 is fixedly connected to the cylinder body 1. A support plate 603 is fixedly connected to the inner wall of the air duct 602, and a first motor 604 is fixedly connected to the support plate 603. A fan blade 605 is fixedly connected to the output shaft of the first motor 604. When the electric heater is operating, first turn on the power of the equipment. The first motor 604 located inside the air duct 602 drives the fan blade 605 at the output end to rotate. The fan blade 605 pushes the air to flow through the electric heater for heating, and introduces the outside air or the air in the mine into the inside of the air duct. The ventilation efficiency is high, and the air duct 602 is installed on the mounting frame 507 through the connecting frame 601, and the first motor 604 is fixed on the support plate 603 inside the air duct 602, with strong stability.

[0042] Specifically, as Figure 1 and Figures 6 - 9As shown in the figure, the dust-proof structure 7 includes a mounting frame 701 and two limiting grooves 702 formed inside the mounting frame 701. The other end of the air duct 602 is fixedly connected to the mounting frame 701. Two inlets 703 are formed in the mounting frame 701, and the inlets 703 communicate with the limiting grooves 702. A dust-proof net 706 is snap-fitted on the outside of the mounting frame 701. Two docking blocks 707 are rotatably connected to the dust-proof net 706. One end of the docking block 707 is fixedly connected to a knob 708. A torsion spring 709 is fixedly connected between the inner side of the knob 708 and the dust-proof net 706. The other end of the docking block 707 abuts against the inner wall of the limiting groove 702. A push plate 704 is slidably connected inside the limiting groove 702. A first spring 705 is fixedly connected between the push plate 704 and the inner wall of the limiting groove 702. The docking block 707 abuts against the push plate 704. A second motor 710 is fixedly connected to the outside of the dust-proof net 706. The output shaft of the second motor 710 is rotatably connected to the dust-proof net 706. A brush 711 is fixedly connected to the output shaft of the second motor 710. The brush 711 is slidably connected to the inner side of the dust-proof net 706. The docking block 707 has a "T" - shaped structure. When it is necessary to install the dust-proof net 706 at the end of the air duct 602, first pick up the dust-proof net 706 by grasping the two knobs 708 and rotate the two knobs 708 by 90 degrees, so that the docking blocks 707 connected to the inner sides of the knobs 708 are aligned with the inlets 703 formed in the mounting frame 701, and at the same time, the dust-proof net 706 is aligned with the groove formed in the mounting frame 701. When the docking blocks 707 completely extend into the inside of the limiting grooves 702, the docking blocks 707 first abut against the push plates 704 inside the limiting grooves 702 and compress the first springs 705. Then release the two knobs 708. Further, the knobs 708 drive the docking blocks 707 to rotate by 90 degrees under the reset action of the torsion springs 709. At this time, the ends of the docking blocks 707 abut against the inner walls of the limiting grooves 702, thereby quickly fixing the dust-proof net 706. When it is necessary to disassemble, just rotate the knobs 708 in the reverse direction and pull out the dust-proof net 706 outward, so that the installation and disassembly efficiency of the dust-proof net 706 is high, avoiding repeated disassembly of bolts. At the same time, when a large amount of dust adheres to the inner side of the dust-proof net 706, the second motor 710 on the outside of the dust-proof net 706 can drive the brush 711 on the inner side of the dust-proof net 706 to rotate, and the brush 711 can effectively brush off the dust adhering to the inner side of the dust-proof net 706, avoiding the need to remove the entire dust-proof net 706 for cleaning, with strong flexibility.

[0043] Specifically, as Figure 1 and Figures 10 - 11As shown, the opening and closing structure 8 includes a docking port 801 and two rotating shafts 802 rotatably connected to the docking port 801. The docking port 801 is fixedly connected to the air outlet 203. A sealing plate 803 is fixedly connected to the rotating shaft 802. The sealing plate 803 is slidably connected to the inner wall of the docking port 801. A gear 804 is fixedly connected to the bottom end of the rotating shaft 802. A protective shell 809 is fixedly connected to the outer wall of the docking port 801. A rack 805 is slidably connected to the inner wall of the docking port 801. The rack 805 meshes with the gear 804. The other end of the rack 805 is slidably connected to the inner wall of the protective shell 809. A guiding bar 807 is fixedly connected to the inner wall of the protective shell 809. A connecting block 806 is fixedly connected to the rack 805. The connecting block 806 is slidably connected to the guiding bar 807. A second spring 808 is fixedly connected between the connecting block 806 and the outer wall of the protective shell 809. During the process of fixing the air duct opening and the docking port 801, the outer wall of the air duct opening will first contact the two racks 805 on the docking port 801, driving the racks 805 to slide into the interior of the protective shell 809. At the same time, the racks 805 drive the gears 804 and the rotating shafts 802 to rotate. The two rotating shafts 802 respectively drive the two sealing plates 803 to rotate 90 degrees. At this time, the two sealing plates 803 are in an open state, thus not affecting the circulation of hot air inside the cylinder 1. When the electric heater is in an uninstalled or transported state, since a second spring 808 is fixedly connected between the connecting block 806 fixed on the rack 805 and the inner wall of the protective shell 809, the connecting block 806 is driven to slide along the guiding bar 807 under the reset action of the second spring 808. At the same time, the gear 804 drives the sealing plate 803 to rotate 90 degrees in the reverse direction until the two sealing plates 803 are in a closed state. At this time, the two sealing plates 803 can effectively prevent dust or other sundries from entering the interior of the cylinder 1, and the protection ability is strong.

[0044] When the present invention is in use, the device is carried to a designated position for installation. During installation, it is necessary to align the docking port 801 at the end of the cylinder 1 with the reserved air duct opening on the air duct. First, carry the device to a position near the air duct opening. If the ground at the installation location has slopes or potholes, only need to adjust the support rods 302 at the four corners of the bottom support frame 301 respectively. If it is necessary to adjust the length of the support rod 302 downward, by rotating the nut 304 at the center position of the support rod 302, the nut 304 can be moved upward along the support rod 302, so that the support rod 302 drives the bottom mounting plate 303 to move downward. Then, adjust the support rods 302 and nuts 304 at the other three corners respectively until the support frame 301 is kept horizontal with the ground, so as to accurately dock the heater with the air duct, avoid deviation and misalignment in the connection between the inlet and outlet and the air duct, and enhance the stability.

[0045] After adjusting the level of the support frame 301, the installer needs to adjust the horizontal position and vertical height of the electric heater according to the actual situation on site, so as to ensure that the docking port 801 on the electric heater is flush with the air duct opening. When adjusting the vertical height of the electric heater, through the hydraulic rod 505 installed on the support beam 406, the hydraulic rod 505 drives the second slide plate 403 located inside to slide outward along the guide rod 401. The second slide plate 403 drives the first slide plate 402 located outside to slide in the direction of the telescopic end of the hydraulic rod 505 through the connecting plate 506. At this time, since the other second slide plate 403 and the first slide plate 402 are both threadedly connected to the lead screw 404, the second slide plate 403 and the first slide plate 402 will not move. Instead, the second slide plate 403 connected to the hydraulic rod 505 drives the bases 501 at both ends to move in the direction of the other second slide plate 403. At the same time, the bases 501 on the outer first slide plate 402 slide in the direction of the other first slide plate 402, thereby gradually reducing the angle between the rotating rod 502 and the connecting rod 504, and the connection between the two rotates. At this time, the tops of the four rotating rods 502 move upward simultaneously. Since the tops of the rotating rods 502 are rotatably connected to the top seats 503 at the bottom of the mounting frame 507, the mounting frame 507 is driven to move upward while maintaining a horizontal state until the docking port 801 on the electric heater is flush with the air duct opening. At this time, the height of the electric heater is quickly adjusted, solving the problem that it is difficult to move due to the large volume of the electric heater, improving the installation efficiency. Then, the nuts 304 on the support rods 302 at the four corners are rotated respectively, and the load-bearing beams 305 at both ends are slid upward along the support rods 302 until the top surfaces of the two load-bearing beams 305 are in contact with the ground of the mounting frame 507. Then, the position of the nut 304 is adjusted to limit the load-bearing beam 305 through the nut 304. At this time, the load-bearing beam 305 plays a supporting role for the mounting frame 507 and the electric heater, avoiding deformation of the rotating rod 502, the connecting rod 504 and their connection under long-term heavy pressure, and having strong practicability;

[0046] After adjusting the docking interface 801 of the electric heater to the same height as the air duct opening, it is also necessary to adjust the front and rear positions of the electric heater so that the docking interface 801 and the air duct opening contact and dock with each other, so as to facilitate the subsequent fixing of the two by bolts. It is only necessary to rotate the handle 405 at the end of the support frame 301, and the handle 405 drives the screw rod 404 to rotate on the support frame 301. Since the screw rod 404 is respectively threadedly connected with the outer second slide plate 403, the support beam 406 and the inner first slide plate 402, the screw rod 404 drives the three to move simultaneously. Since the support beam 406 and the inner second slide plate 403 are connected by the hydraulic rod 505, and the inner second slide plate 403 and the outer first slide plate 402 are connected by the connecting plate 506, it is ensured that the two first slide plates 402 and the two second slide plates 403 move simultaneously, avoiding the problem of the height change of the electric heater caused by the change in the angle between the rotating rod 502 and the connecting rod 504. At this time, the horizontal position of the electric heater can be effectively adjusted, which is beneficial to the docking interface 801 of the electric heater. 01 is docked with the air duct opening, and the adjustment efficiency of the electric heater position is high. In the process of fixing the air duct opening and the docking port 801, the outer wall of the air duct opening will first conflict with the two racks 805 on the docking port 801, driving the racks 805 to slide into the inside of the protective shell 809. At the same time, the racks 805 drive the gears 804 and the shafts 802 to rotate, and the two shafts 802 respectively drive the two sealing plates 803 to rotate 90 degrees. At this time, the two sealing plates 803 are in an open state, thereby not affecting the circulation of hot air inside the cylinder 1. When the electric heater is not installed or in a transportation state, since the second spring 808 is fixedly connected between the connecting block 806 fixed on the rack 805 and the inner wall of the protective shell 809, the connecting block 806 is driven to slide along the guide bar 807 under the reset action of the second spring 808, and the gear 804 drives the sealing plate 803 to rotate 90 degrees in the opposite direction until the two sealing plates 803 are in a closed state. At this time, the two sealing plates 803 can effectively prevent dust or other debris from entering the interior of the cylinder 1, and the protective ability is strong;

[0047] When the electric heater is operating, first turn on the power of the device. The fan blade 605 at the driving output end of the first motor 604 inside the air duct 602 rotates. The fan blade 605 pushes the air to flow through the electric heater for heating, and introduces the outside air or the air in the mine into the air duct. The ventilation efficiency is high, and the air duct 602 is installed on the mounting frame 507 through the connecting frame 601. The first motor 604 is fixed on the support plate 603 inside the air duct 602, with strong stability. After the first motor 604 operates stably, start the heating element of the electric heater through the control device. The heating tube 202 at the bottom of the junction box 201 starts to heat up after being powered on, heats the air in the cylinder body 1 to the set temperature, and then blows it into the air duct through the docking port 801 on the air outlet 203, preventing the device from malfunctioning due to freezing at low temperatures, improving the working environment of miners, ensuring the ventilation safety of the mine, and being easy to operate;

[0048] When it is necessary to install the dust-proof net 706 at the end of the air duct 602, first pick up the dust-proof net 706 by grasping two knobs 708, and rotate the two knobs 708 by 90 degrees, so that the docking block 707 connected to the inner side of the knob 708 is aligned with the inlet 703 opened on the mounting frame 701, and at the same time align the dust-proof net 706 with the groove opened on the mounting frame 701. When the docking block 707 completely extends into the inside of the limiting groove 702, the docking block 707 first touches the push plate 704 inside the limiting groove 702 and compresses the first spring 705, and then release the two knobs 708. Then, the knob 708 drives the docking block 707 to rotate by 90 degrees under the reset action of the torsion spring 709. At this time, the end of the docking block 707 is in contact with the inner wall of the limiting groove 702, so as to quickly fix the dust-proof net 706. When it is necessary to disassemble, just rotate the knob 708 in the reverse direction and pull out the dust-proof net 706, so that the installation and disassembly efficiency of the dust-proof net 706 is high, avoiding repeated disassembly of bolts. At the same time, when a large amount of dust adheres to the inner side of the dust-proof net 706, the second motor 710 on the outer side of the dust-proof net 706 can drive the brush 711 on the inner side of the dust-proof net 706 to rotate, and the brush 711 can effectively brush off the dust adhering to the inner side of the dust-proof net 706, avoiding the need to remove the entire dust-proof net 706 for cleaning, with strong flexibility.

[0049] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0050] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An air duct explosion-proof electric heater, characterized in that, It includes a cylinder body (1), a leveling structure (3) provided at the bottom of the cylinder body (1), a moving structure (4) connected to the leveling structure (3), a height-adjusting structure (5) cooperating with the moving structure (4), an air intake structure (6) installed on the height-adjusting structure (5), a dust-proof structure (7) provided on the air intake structure (6), and an opening and closing structure (8) provided on the cylinder body (1); The moving structure (4) includes guide rods (401) and two first sliding plates (402) slidably connected to the guide rods (401). Two guide rods (401) are provided on the leveling structure (3), and two second sliding plates (403) are slidably connected to the two guide rods (401). A height-adjusting structure (5) is cooperated with the first sliding plate (402). The height-adjusting structure (5) includes a base (501) and a rotating rod (502) rotatably connected to the base (501). Bases (501) are fixedly connected to both ends of the first sliding plate (402) and the second sliding plate (403). A top seat (503) is provided on the rotating rod (502). An installation frame (507) is fixedly connected between the four top seats (503). The top end of the rotating rod (502) is rotatably connected to the top seat (503). Link rods (504) are rotatably connected to the four bases (501) near the outside. The link rods (504) are rotatably connected to the central position of the rotating rod (502).

2. The air duct explosion-proof electric heater according to claim 1, wherein: A support beam (406) is slidably connected between the two guide rods (401). A hydraulic rod (505) is fixedly connected to the support beam (406). The telescopic end of the hydraulic rod (505) is fixedly connected to the adjacent second sliding plate (403). A connecting plate (506) is fixedly connected between the first sliding plate (402) near the outside and the second sliding plate (403) near the inside.

3. The air duct explosion-proof electric heater according to claim 1, characterized in that: The leveling structure (3) includes a support frame (301) and support rods (302) slidably connected to the four corners of the support frame (301). A support frame (301) is provided at the bottom of the cylinder body (1). An installation plate (303) is fixedly connected to the bottom of the support rod (302). A nut (304) is threadedly connected to the central position of the support rod (302). The top surface of the nut (304) abuts against the outer wall of the support frame (301).

4. The air duct explosion-proof electric heater according to claim 3, wherein: A load-bearing beam (305) is slidably connected between two adjacent support rods (302). The installation frame (507) abuts between the two load-bearing beams (305). Another nut (304) is threadedly connected to the top end of the support rod (302). The top surface of the nut (304) abuts against the outer wall of the load-bearing beam (305).

5. The air duct explosion-proof electric heater according to claim 3, wherein: Two guide rods (401) are fixedly connected to the support frame (301). One end of the support frame (301) close to the second slide plate (403) is rotatably connected to a lead screw (404). The lead screw (404) is threadedly connected to the second slide plate (403) near the outside. The lead screw (404) passes through the second slide plate (403) located inside. The end of the lead screw (404) is threadedly connected to the support beam (406). The lead screw (404) is threadedly connected to the first slide plate (402) located inside. The other end of the lead screw (404) is fixedly connected to a handle (405). A cylinder (1) is fixedly connected to the mounting frame (507).

6. The air duct explosion-proof electric heater according to claim 5, wherein: A heating structure (2) is installed on the cylinder (1). The heating structure (2) includes a junction box (201) and a plurality of heating tubes (202) fixedly connected to the bottom of the junction box (201). Two junction boxes (201) are fixedly connected to the top end of the cylinder (1). An air outlet (203) is fixedly connected to one end of the cylinder (1).

7. The air duct explosion-proof electric heater according to claim 5, characterized in that: The air intake structure (6) includes a connecting frame (601) and a wind cylinder (602) fixedly connected to the connecting frame (601). The connecting frame (601) is fixedly connected to the end of the mounting frame (507). One end of the wind cylinder (602) is fixedly connected to the cylinder (1). A support plate (603) is fixedly connected to the inner wall of the wind cylinder (602). A first motor (604) is fixedly connected to the support plate (603). A fan blade (605) is fixedly connected to the output shaft of the first motor (604).

8. The air duct explosion-proof electric heater according to claim 7, wherein: The dust-proof structure (7) includes a mounting frame (701) and two limiting grooves (702) formed inside the mounting frame (701). The other end of the wind cylinder (602) is fixedly connected to the mounting frame (701). Two inlets (703) are formed in the mounting frame (701). The inlets (703) communicate with the limiting grooves (702). A dust-proof net (706) is snap-fitted to the outside of the mounting frame (701). Two docking blocks (707) are rotatably connected to the dust-proof net (706). One end of the docking block (707) is fixedly connected to a knob (708). A torsion spring (709) is fixedly connected between the inner side of the knob (708) and the dust-proof net (706). The other end of the docking block (707) abuts against the inner wall of the limiting groove (702). A push plate (704) is slidably connected inside the limiting groove (702). A first spring (705) is fixedly connected between the push plate (704) and the inner wall of the limiting groove (702). The docking block (707) abuts against the push plate (704).

9. The air duct explosion-proof electric heater according to claim 8, characterized in that: A second motor (710) is fixedly connected to the outer side of the dust-proof net (706). A rotating connection is provided between the output shaft of the second motor (710) and the dust-proof net (706). A brush (711) is fixedly connected to the output shaft of the second motor (710). The brush (711) is slidably connected to the inner side of the dust-proof net (706). The docking block (707) has a "T" - shaped structure.

10. The air duct explosion-proof electric heater according to claim 6, characterized in that: The opening and closing structure (8) includes a docking port (801) and two rotating shafts (802) rotatably connected to the docking port (801). The docking port (801) is fixedly connected to the air outlet (203). A sealing plate (803) is fixedly connected to the rotating shaft (802). The sealing plate (803) is slidably connected to the inner wall of the docking port (801). A gear (804) is fixedly connected to the bottom end of the rotating shaft (802). A protective shell (809) is fixedly connected to the outer wall of the docking port (801). A rack (805) is slidably connected to the inner wall of the docking port (801). The rack (805) meshes with the gear (804). The other end of the rack (805) is slidably connected to the inner wall of the protective shell (809). A guiding strip (807) is fixedly connected to the inner wall of the protective shell (809). A connecting block (806) is fixedly connected to the rack (805). The connecting block (806) is slidably connected to the guiding strip (807). A second spring (808) is fixedly connected between the connecting block (806) and the outer wall of the protective shell (809).

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