Limited space ventilation device

Abstract

The utility model discloses a limited space ventilation device which comprises a machine box and a ventilation head assembly, the ventilation head assembly comprises an air inlet main pipe, the bottom end of the air inlet main pipe is fixedly connected and communicated with an air inlet conical opening, the cross section area of the bottom end of the air inlet conical opening is larger than the area of the top end of the air inlet conical opening, and a plurality of L-shaped exhaust pipes are evenly arranged on the peripheral side of the air inlet main pipe. A plurality of first supporting rods are horizontally and fixedly connected between the side walls of the L-shaped exhaust pipes and the side wall of the air inlet main pipe, and a plurality of second supporting rods are uniformly, horizontally and fixedly connected to the peripheral side of the top end of the air inlet main pipe; the ventilation head assembly is used for ventilation, fresh air enters the ventilation head assembly through the air inlet conical opening, the air can enter the ventilation head assembly downwards in a diffusion mode, meanwhile, the L-shaped exhaust pipe can extract original air in the space, suction force is applied to the surrounding original air to extract the surrounding original air, and therefore the original air can enter the L-shaped exhaust pipe upwards; in this way, original high-density air in the limited space is assisted to be discharged, the discharging speed is higher, ventilation can be conducted quickly in cooperation with entering of fresh air, and the efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation equipment, in particular to a limited space ventilation device. Background Art

[0002] In the industry, trade and construction industries, it is often necessary to enter a limited space such as a sewage treatment pool, a culvert, a deep foundation pit, a pit, an underground pipe trench, a fermentation pool, a pickling pool, a pulp pool, a storage tank (tank), a reaction tower, a boiler, etc. to perform operations. The air environment in such a limited space is complex and needs to be ventilated and then tested to ensure that the air environment in the limited space is normal before the operation can be performed. In this regard, a Chinese utility model patent with an authorization announcement number of CN217154443U discloses a limited space ventilation device, which relates to the technical field of ventilation equipment; the ventilation device includes a blower, the air outlet of the blower is fixedly sealed and connected with a hose, an air outlet nozzle is installed at the end of the hose, a detector is hinged on the side wall of the air outlet nozzle, the detector and the blower are respectively electrically connected to a control end, and a lithium battery is arranged in the control end. The ventilation device uses a ventilation head to extend into the space and ventilate with a blower, but has the following defects:

[0003] The main harmful gases in confined spaces are hydrogen sulfide, carbon monoxide, carbon dioxide and other flammable and explosive gases (such as methane). Among them, hydrogen sulfide gas has a large density and is prone to deposition. Simply using a blower to let in air will make it difficult for the harmful air inside to be discharged upward. In this way, it will take a long time to let in air to complete the ventilation in the space, which is inefficient.

[0004] For this reason, we propose a limited space ventilation device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a limited space ventilation device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a limited space ventilation device, including a chassis and a ventilation head assembly, the ventilation head assembly includes an air inlet main pipe, the bottom end of the air inlet main pipe is fixedly connected to and connected to an air inlet cone, the cross-sectional area of ​​the bottom end of the air inlet cone is larger than the top end area, a plurality of L-shaped exhaust pipes are evenly arranged around the air inlet main pipe, a plurality of first support rods are horizontally fixedly connected between the side walls of the plurality of L-shaped exhaust pipes and the side walls of the air inlet main pipe, a plurality of second support rods are evenly fixedly connected to and connected to the top of the air inlet main pipe, the ends of the plurality of second support rods are fixedly connected to an annular air duct, and the bottom surface of the annular air duct is fixedly connected to and connected to the tops of the plurality of L-shaped exhaust pipes;

[0007] The bottom end of the L-shaped exhaust pipe faces obliquely upward, the top end of the main air inlet pipe is fixedly connected to and communicates with the bent air inlet rigid pipe, and the side wall of the annular air duct is horizontally fixedly connected to and communicates with the exhaust rigid pipe.

[0008] Preferably, an air inlet cavity is opened in the upper part of the chassis, an air outlet cavity is opened in the middle part of the chassis, a battery is fixedly connected to the bottom of the chassis, an air inlet fan is fixedly connected to the air inlet cavity, and an exhaust fan is fixedly connected to the air outlet cavity.

[0009] Preferably, an air inlet duct and an air outlet duct are horizontally fixed to one side of the chassis, the air inlet duct is connected to the air inlet fan, the air outlet duct is connected to the exhaust fan, an air inlet hose is connected between the air inlet duct and the bent air inlet rigid tube, and an exhaust hose is connected between the air outlet duct and the exhaust rigid tube.

[0010] Preferably, the end of the air inlet pipe is fixedly connected to the first main flange on its circumference, the one end of the air inlet hose is fixedly connected to the first sub-flange on its circumference, and the other end of the air inlet hose is fixedly connected to the third sub-flange on its circumference, a plurality of first bolts are horizontally inserted into the first main flange and the first sub-flange, and the ends of the first bolts are threadedly connected to the first nut, the end of the bent air inlet rigid pipe is fixedly connected to the third main flange on its circumference, a plurality of third bolts are horizontally inserted into the third main flange and the third sub-flange, and the ends of the third bolts are threadedly connected to the third nut.

[0011] Preferably, the end of the air inlet pipe is fixedly connected to the second main flange on its circumference, the one end of the exhaust hose is fixedly connected to the second sub-flange on its circumference, the other end of the exhaust hose is fixedly connected to the fourth sub-flange on its circumference, a plurality of second bolts are horizontally inserted into the second main flange and the second sub-flange, the ends of the second bolts are threadedly connected to the second nuts, the end of the exhaust rigid pipe is fixedly connected to the fourth main flange on its circumference, a plurality of fourth bolts are horizontally inserted into the fourth main flange and the fourth sub-flange, the ends of the fourth bolts are threadedly connected to the fourth nuts.

[0012] Preferably, an air inlet is provided on a side of the chassis away from the air inlet pipe, and an air outlet is provided on a side of the chassis away from the air outlet pipe, the air inlet is connected to the air inlet cavity, and the air outlet is connected to the air outlet cavity, a hanging ring is provided directly above the air inlet main pipe, a plurality of support plates are horizontally fixedly connected to the periphery of the bottom end of the air inlet main pipe, a plurality of bent rods are fixedly connected between one end of the support plates away from the air inlet main pipe and the bottom surface of the hanging ring, and a counterweight ring is fixedly connected to the periphery of the bottom end of the air inlet conical port.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The ventilation head assembly of the utility model is used for ventilation. Fresh air enters through the air inlet cone, and the air will diffuse downward. At the same time, the L-shaped exhaust duct will draw out the original air in the space, and suction is applied to the original air around it to draw it out. In this way, the original air will enter the L-shaped exhaust duct upward, which assists the discharge of the original high-density air in the limited space, and the discharge speed is faster. Combined with the entry of fresh air, ventilation can be achieved quickly with higher efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure in the first and second embodiments of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the ventilation head assembly in the first and second embodiments of the utility model;

[0017] Figure 3 It is a schematic diagram of the cross-section structure of the ventilation head assembly in the first and second embodiments of the utility model;

[0018] Figure 4 This is a schematic diagram of the cross-section structure of the chassis in the second embodiment of the utility model.

[0019] In the figure: 1, chassis; 2, ventilation head assembly; 3, air inlet hose; 4, exhaust hose; 11, air inlet cavity; 12, air outlet cavity; 13, air inlet pipe; 14, air outlet pipe; 15, air inlet fan; 16, exhaust fan; 17, first main flange; 18, first bolt; 19, first nut; 110, second main flange; 111, second bolt; 112, second nut; 113, air inlet; 114, air outlet; 115, battery; 21, air inlet main pipe; 22, air inlet cone; 2 3. L-shaped exhaust duct; 24. First support rod; 25. Second support rod; 26. Annular air duct; 27. Bent air inlet rigid duct; 28. Exhaust rigid duct; 29. ​​Counterweight ring; 210. Lifting ring; 211. Support plate; 212. Bent rod; 213. Third main flange; 214. Fourth main flange; 31. First sub-flange; 32. Third sub-flange; 33. Third bolt; 34. Third nut; 41. Second sub-flange; 42. Fourth sub-flange; 43. Fourth bolt; 44. Fourth nut. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1:

[0022] See also Figure 1-Figure 3 The utility model provides a technical solution: a limited space ventilation device, including a chassis 1 and a ventilation head assembly 2, the ventilation head assembly 2 includes an air inlet main pipe 21, the bottom end of the air inlet main pipe 21 is fixedly connected to and connected to an air inlet cone 22, the cross-sectional area of ​​the bottom end of the air inlet cone 22 is larger than the top end area, a plurality of L-shaped exhaust pipes 23 are evenly arranged around the air inlet main pipe 21, a plurality of first support rods 24 are horizontally fixedly connected between the side walls of the plurality of L-shaped exhaust pipes 23 and the side walls of the air inlet main pipe 21, a plurality of second support rods 25 are evenly fixedly connected to the top of the air inlet main pipe 21, the ends of the plurality of second support rods 25 are fixedly connected to an annular air duct 26, and the bottom surface of the annular air duct 26 is fixedly connected to and connected to the top ends of the plurality of L-shaped exhaust pipes 23;

[0023] The bottom end of the L-shaped exhaust duct 23 faces obliquely upward, the top of the air inlet main pipe 21 is fixedly connected to and connected with the bent air inlet rigid pipe 27, the side wall of the annular air duct 26 is horizontally fixedly connected to and connected with the exhaust rigid pipe 28, and fresh air enters through the air inlet conical port 22. The air will diffuse downward, and at the same time, the L-shaped exhaust duct 23 will extract the original air in the space, and apply suction to the original air around it to extract it out, so that the original air will enter the L-shaped exhaust duct 23 upward, thus assisting the original high-density air in the limited space to be discharged faster, and with the entry of fresh air, ventilation can be rapid and more efficient.

[0024] Embodiment 2:

[0025] See also Figure 1-Figure 4 , which is the second embodiment of the utility model. This embodiment is based on the previous embodiment. An air inlet chamber 11 is opened in the upper part of the chassis 1, an air outlet chamber 12 is opened in the middle part of the chassis 1, a battery 115 is fixedly connected to the bottom of the chassis 1, an air inlet fan 15 is fixedly connected to the air inlet chamber 11, and an exhaust fan 16 is fixedly connected to the air outlet chamber 12.

[0026] An air inlet duct 13 and an air outlet duct 14 are horizontally fixed to one side of the chassis 1. The air inlet duct 13 is connected to an air inlet fan 15, and the air outlet duct 14 is connected to an exhaust fan 16. The air inlet hose 3 is connected between the air inlet duct 13 and the bent air inlet rigid tube 27, and the exhaust hose 4 is connected between the air outlet duct 14 and the exhaust rigid tube 28. The air inlet fan 15 is used to pass fresh air into the air inlet main tube 21, and the exhaust fan 16 is used to extract the air originally in the space from the L-shaped exhaust duct 23.

[0027] The end of the air inlet pipe 13 is fixedly connected to the first main flange 17, one end of the air inlet hose 3 is fixedly connected to the first sub-flange 31, and the other end of the air inlet hose 3 is fixedly connected to the third sub-flange 32. A plurality of first bolts 18 are horizontally inserted into the first main flange 17 and the first sub-flange 31, and the ends of the first bolts 18 are threadedly connected to the first nuts 19. The end of the bent air inlet rigid tube 27 is fixedly connected to the third main flange 213, and a plurality of third bolts 33 are horizontally inserted into the third main flange 213 and the third sub-flange 32, and the ends of the third bolts 33 are threadedly connected to the third nuts 34.

[0028] The end of the air inlet pipe 13 is fixedly connected to the second main flange 110, one end of the exhaust hose 4 is fixedly connected to the second sub-flange 41, and the other end of the exhaust hose 4 is fixedly connected to the fourth sub-flange 42. A plurality of second bolts 111 are horizontally inserted into the second main flange 110 and the second sub-flange 41, and the ends of the second bolts 111 are threadedly connected to the second nuts 112. The end of the exhaust rigid pipe 28 is fixedly connected to the fourth main flange 214, and a plurality of fourth bolts 43 are horizontally inserted into the fourth main flange 214 and the fourth sub-flange 42, and the ends of the fourth bolts 43 are threadedly connected to the fourth nuts 44. The air inlet hose 3 and the exhaust hose 4 are connected by flanges for easy replacement. Air inlet hoses 3 and exhaust hoses 4 of different lengths can be used according to the type of space.

[0029] An air inlet 113 is provided on a side of the chassis 1 away from the air inlet duct 13, and an air outlet 114 is provided on a side of the chassis 1 away from the air outlet duct 14. The air inlet 113 is connected to the air inlet cavity 11, and the air outlet 114 is connected to the air outlet cavity 12. A hanging ring 210 is provided directly above the air inlet main pipe 21, and a plurality of support plates 211 are horizontally fixedly connected to the periphery of the bottom end of the air inlet main pipe 21. A plurality of bent rods 212 are fixedly connected between one end of the plurality of support plates 211 away from the air inlet main pipe 21 and the bottom surface of the hanging ring 210. A counterweight ring 29 is fixedly connected to the periphery of the bottom end of the air inlet cone port 22. The hanging ring 210 is used to connect the lifting equipment. In some deeper types of spaces, it is convenient to lower the ventilation head assembly 2 to the bottom of the space to ensure the thoroughness of ventilation.

[0030] Embodiment 3:

[0031] See also Figure 1-Figure 4 , which is the third embodiment of the utility model. This embodiment is based on the above two embodiments. The ventilation head assembly 2 of the utility model is used for ventilation. Fresh air enters through the air inlet cone 22, and the air will diffuse downward. At the same time, the L-shaped exhaust duct 23 will extract the original air in the space and apply suction to the original air around it. In this way, the original air will enter the L-shaped exhaust duct 23 upward, which will assist the original high-density air in the limited space to be discharged at a faster speed. Combined with the entry of fresh air, ventilation can be achieved quickly with higher efficiency.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A limited space ventilation device, comprising a chassis (1) and a ventilation head assembly (2), characterized in that: The ventilation head assembly (2) comprises an air inlet main pipe (21), the bottom end of the air inlet main pipe (21) is fixedly connected to and communicated with an air inlet conical port (22), the cross-sectional area of ​​the bottom end of the air inlet conical port (22) is larger than the area of ​​the top end, a plurality of L-shaped exhaust pipes (23) are evenly arranged around the air inlet main pipe (21), a plurality of first support rods (24) are horizontally fixedly connected between the side walls of the plurality of L-shaped exhaust pipes (23) and the side walls of the air inlet main pipe (21), a plurality of second support rods (25) are evenly fixedly connected to and communicated with the top end of the air inlet main pipe (21), the ends of the plurality of second support rods (25) are fixedly connected to an annular air duct (26), and the bottom surface of the annular air duct (26) is fixedly connected to and communicated with the top ends of the plurality of L-shaped exhaust pipes (23); The bottom end of the L-shaped exhaust pipe (23) faces obliquely upward, the top end of the main air inlet pipe (21) is fixedly connected to and communicates with the bent air inlet rigid pipe (27), and the side wall of the annular air duct (26) is horizontally fixedly connected to and communicates with the exhaust rigid pipe (28).

2. A limited space ventilation device according to claim 1, characterized in that: An air inlet chamber (11) is provided at the upper portion of the interior of the chassis (1), an air outlet chamber (12) is provided at the middle portion of the interior of the chassis (1), a battery (115) is fixedly connected to the bottom of the interior of the chassis (1), an air inlet fan (15) is fixedly connected to the interior of the air inlet chamber (11), and an air outlet fan (16) is fixedly connected to the interior of the air outlet chamber (12).

3. A limited space ventilation device according to claim 2, characterized in that: An air inlet pipe (13) and an air outlet pipe (14) are horizontally fixedly connected to one side of the chassis (1); the air inlet pipe (13) is connected to an air inlet fan (15); the air outlet pipe (14) is connected to an exhaust fan (16); an air inlet hose (3) is connected between the air inlet pipe (13) and the bent air inlet rigid pipe (27); and an exhaust hose (4) is connected between the air outlet pipe (14) and the exhaust rigid pipe (28).

4. A limited space ventilation device according to claim 3, characterized in that: The end of the air inlet pipe (13) is fixedly connected to the first main flange (17) at the circumferential side, the one end of the air inlet hose (3) is fixedly connected to the first sub-flange (31) at the circumferential side, and the other end of the air inlet hose (3) is fixedly connected to the third sub-flange (32) at the circumferential side, a plurality of first bolts (18) are horizontally inserted on the first main flange (17) and the first sub-flange (31), and the ends of the first bolts (18) are threadedly connected to the first nut (19), the end of the bent air inlet rigid pipe (27) is fixedly connected to the third main flange (213), a plurality of third bolts (33) are horizontally inserted on the third main flange (213) and the third sub-flange (32), and the ends of the third bolts (33) are threadedly connected to the third nut (34).

5. A limited space ventilation device according to claim 3, characterized in that: The end of the air inlet pipe (13) is fixedly connected to the second main flange (110) at the circumferential side, the exhaust hose (4) is fixedly connected to the second sub-flange (41) at the circumferential side at one end, and the exhaust hose (4) is fixedly connected to the fourth sub-flange (42) at the circumferential side at the other end. A plurality of second bolts (111) are horizontally inserted on the second main flange (110) and the second sub-flange (41), and the ends of the second bolts (111) are threadedly connected to the second nuts (112). The end of the exhaust hard pipe (28) is fixedly connected to the fourth main flange (214), and a plurality of fourth bolts (43) are horizontally inserted on the fourth main flange (214) and the fourth sub-flange (42), and the ends of the fourth bolts (43) are threadedly connected to the fourth nuts (44).

6. A limited space ventilation device according to claim 3, characterized in that: An air inlet (113) is provided on a side of the chassis (1) away from the air inlet pipe (13), and an air outlet (114) is provided on a side of the chassis (1) away from the air outlet pipe (14); the air inlet (113) is connected to the air inlet cavity (11), and the air outlet (114) is connected to the air outlet cavity (12); a hanging ring (210) is provided directly above the air inlet main pipe (21); a plurality of support plates (211) are horizontally fixedly connected to the periphery of the bottom end of the air inlet main pipe (21); a plurality of bent rods (212) are fixedly connected between one end of the plurality of support plates (211) away from the air inlet main pipe (21) and the bottom surface of the hanging ring (210); and a counterweight ring (29) is fixedly connected to the periphery of the bottom end of the air inlet conical opening (22).

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