Underground engineering construction ventilation opening protection device

Abstract

The utility model discloses an underground engineering construction ventilation opening protection device, including the ventilation pipe, be provided with the support in the ventilation pipe, one side of support is provided with the fan, is provided with the fan blade on the output, is provided with the top cover on the top of ventilation pipe, and the top of top cover is closed, and a plurality of ventilation holes are seted up around, and the top cover is rotatably connected with the ring, is provided with a plurality of circumferentially even arrangement's vane on the top of ring, and every vane is vertically arranged, and all deviate from the radius of ring and be arranged in the form of inclination, through the connection between ring, vane and round plate, and the effect of the inner rotation of ring in top cover, make the airflow produced when fan drive vane rotate can be discharged through the clearance between every vane, through the inclination design of vane, make a plurality of vane together with round plate and ring produce the rotation effect of axial, thereby improve the ventilation effect, compared with prior art, have the protection effect, guarantee exhaust capacity simultaneously, improve the ventilation effect.

Description

Technical Field

[0001] This utility model relates to the field of protective device technology, and in particular to a protective device for ventilation openings in underground engineering construction. Background Technology

[0002] Utility model CN222162681U discloses a protective device for ventilation openings in underground engineering construction, comprising: a ventilation duct, an outlet of the ventilation duct with a manhole cover, the top of the ventilation duct and the top of the manhole cover being connected by a second support arm, two first support arms rotatably mounted inside the ventilation duct, one end of each of the two first support arms being rotatably mounted on the manhole cover, and the other ends of the two first support arms being connected by a connecting rod, the connecting rod being provided with a driving mechanism. In this utility model, the driving mechanism pushes the connecting rod to rotate the first support arms inside the ventilation duct, the first support arms lifting the manhole cover, and cooperating with the second support arms to open the manhole cover, thereby facilitating the closure of the ventilation duct, reducing labor costs, and preventing wild animals from entering the ventilation duct at night and causing damage or death of wild animals inside the ventilation duct and causing pollution.

[0003] After searching, it was found that the existing technology has certain defects. Although the use of a drive device to achieve the closing action of the top cover can avoid manual operation, there are a large number of ventilation holes in underground construction. Using a drive device for each ventilation hole leads to high costs. In addition, the exhaust volume is reduced after the cover is closed, resulting in poor ventilation effect. Therefore, there is a need for a protective device for ventilation holes in underground construction to meet people's needs. Utility Model Content

[0004] The purpose of this utility model is to provide a protective device for ventilation openings in underground engineering construction to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a protective device for ventilation openings in underground engineering construction, comprising a ventilation pipe, a support frame inside the ventilation pipe, a fan on one side of the support frame, fan blades on the output end of the fan, a top cover on the top of the ventilation pipe, the top of the top cover being closed, and several ventilation holes around it, a circular ring being rotatably connected inside the top cover, and several circumferentially evenly arranged blades on the top of the circular ring, each blade being vertically arranged and inclined away from the radius of the circular ring, and the tops of the several blades being connected to the same circular plate.

[0006] Preferably, a first flange is provided at the top of the ventilation pipe, and a second flange is provided at the bottom of the top cover. The first flange and the second flange are connected by a number of bolts and nuts.

[0007] Preferably, the top of the top cover is tapered.

[0008] Preferably, a positioning groove is provided on the inner wall of the top cover. The positioning groove is arranged in a ring, and a portion of the ring near the outer wall is rotatably connected in the positioning groove.

[0009] Preferably, a plurality of balls are rotatably connected to the outer wall of the ring, and the plurality of balls are evenly arranged in a circumferential shape, with the outer wall of each ball in contact with the inner wall of the positioning groove away from the opening.

[0010] Preferably, a wind turbine is provided at the top of the top cover, and one end of the wind turbine passes through the top cover and is connected to the top of the circular plate.

[0011] The beneficial effects of this utility model are:

[0012] In this invention, the connection between the ring, blades, and circular plate, as well as the rotation effect of the ring within the top cover, allows the airflow generated when the fan drives the blades to rotate to be discharged through the gaps between each blade. Through the inclined design of the blades, several blades, together with the circular plate and the ring, generate an axial rotation effect, thereby improving the ventilation effect. Compared with the prior art, it has a protective effect while ensuring the exhaust volume and improving the ventilation effect.

[0013] In this invention, the tilted design of the blades allows the blades, along with the circular plate and the ring, to rotate when the external wind force is strong. This creates a negative pressure effect at the ring, thereby achieving the ventilation effect of the ventilation duct even when the fan is stopped. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a protective device for ventilation openings in underground engineering construction proposed in this utility model;

[0015] Figure 2 This is a front sectional view of a protective device for ventilation openings in underground engineering construction proposed in this utility model.

[0016] Figure 3 This utility model proposes a protective device for ventilation openings in underground engineering construction. Figure 2 Enlarged structural diagram at point A in the middle;

[0017] Figure 4 This is a top view cross-sectional structural diagram of the blades of a protective device for ventilation openings in underground engineering construction proposed in this utility model.

[0018] In the diagram: 1. Ventilation duct; 2. Support frame; 3. Fan; 4. Fan blade; 5. Top cover; 6. Ventilation hole; 7. Ring; 8. Blade; 9. Circular plate; 10. First flange; 11. Second flange; 12. Bolt; 13. Nut; 14. Positioning groove; 15. Ball bearing; 16. Wind turbine. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-4 A protective device for ventilation openings in underground engineering construction includes a ventilation pipe 1, a support 2 installed inside the ventilation pipe 1, a fan 3 installed on one side of the support 2, fan blades 4 installed on the output end of the fan 3, a top cover 5 installed at the top of the ventilation pipe 1, the top of the top cover 5 is closed, and several ventilation holes 6 are opened around it. A ring 7 is rotatably connected inside the top cover 5, and several circumferentially evenly arranged blades 8 are installed at the top of the ring 7. Each blade 8 is arranged vertically and is inclined away from the radius of the ring 7. The tops of the several blades 8 are connected to the same circular plate 9.

[0021] Through the connection between the ring 7, blades 8, and circular plate 9, and the rotation effect of the ring 7 within the top cover 5, the airflow generated when the fan 3 drives the fan blades 4 to rotate can be discharged through the gaps between each blade 8. Through the inclined design of the blades 8, several blades 8, together with the circular plate 9 and the ring 7, produce an axial rotation effect, thereby improving the ventilation effect. Compared with the existing technology, it has a protective effect while ensuring exhaust volume and improving the ventilation effect. Through the inclined design of the blades 8, when the external wind force is large, the blades 8, together with the circular plate 9 and the ring 7, can produce a rotation effect, thereby creating a negative pressure adsorption effect at the ring 7, thus achieving the ventilation effect of the ventilation pipe 1 when the fan 3 is stopped.

[0022] Specifically, in this embodiment, a first flange 10 is provided on the top end of the ventilation pipe 1, and a second flange 11 is provided on the bottom end of the top cover 5. The first flange 10 and the second flange 11 are connected by a number of bolts 12 and nuts 13, which realizes the connection effect between the top cover 5 and the ventilation pipe 1, and facilitates the installation of the protective device on the ventilation pipe 1, as well as the maintenance and repair after disassembly and replacement of damaged parts.

[0023] Specifically, in this embodiment, the top of the top cover 5 is conical to prevent water accumulation at the top.

[0024] Specifically, in this embodiment, a positioning groove 14 is provided on the inner wall of the top cover 5. The positioning groove 14 is arranged in a ring. The part of the ring 7 near the outer wall is rotatably connected in the positioning groove 14. The positioning groove 14 provides rotation space for the ring 7, and at the same time restricts the axial movement of the ring 7, provides support, and improves the axial stability of the ring 7.

[0025] Specifically, in this embodiment, a number of balls 15 are rotatably connected to the outer wall of the ring 7. The balls 15 are evenly arranged in a circumferential shape. The outer wall of each ball 15 is in contact with the inner wall of the positioning groove 14 away from the opening. The balls 15 make the rotation of the ring 7 smoother, ensuring that it can rotate more smoothly under the drive of external wind force and the wind force of the fan blade 4.

[0026] Specifically, in this embodiment, a wind turbine 16 is provided on the top of the top cover 5. One end of the wind turbine 16 passes through the top cover 5 and is connected to the top of the circular plate 9. The wind turbine 16 rotates under the drive of wind, thereby driving the circular plate 9 to rotate more smoothly. This causes the circular plate 9, blades 8 and ring 7 to rotate synchronously, further improving the utilization of wind power resources.

[0027] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A protective device for ventilation openings in underground engineering construction, comprising a ventilation pipe (1), characterized in that: A support (2) is provided inside the ventilation pipe (1). A fan (3) is provided on one side of the support (2). A fan blade (4) is provided on the output end of the fan (3). A top cover (5) is provided on the top of the ventilation pipe (1). The top of the top cover (5) is closed. Several ventilation holes (6) are provided around it. A ring (7) is rotatably connected inside the top cover (5). Several blades (8) are evenly arranged in a circular shape on the top of the ring (7). Each blade (8) is arranged vertically and is inclined away from the radius of the ring (7). The top of several blades (8) is connected to the same circular plate (9).

2. The protective device for ventilation openings in underground engineering construction according to claim 1, characterized in that: The ventilation pipe (1) is provided with a first flange (10) at the top and a second flange (11) at the bottom of the top cover (5). The first flange (10) and the second flange (11) are connected by a number of bolts (12) and nuts (13).

3. The protective device for ventilation openings in underground engineering construction according to claim 1, characterized in that: The top of the cover (5) is conical.

4. The protective device for ventilation openings in underground engineering construction according to claim 1, characterized in that: The inner wall of the top cover (5) is provided with a positioning groove (14), which is arranged in a ring. The part of the ring (7) near the outer wall is rotatably connected in the positioning groove (14).

5. A protective device for ventilation openings in underground engineering construction according to claim 1, characterized in that: The outer wall of the ring (7) is rotatably connected to several balls (15), which are evenly arranged in a circular shape. The outer wall of each ball (15) is in contact with the inner wall of the positioning groove (14) away from the opening.

6. The protective device for ventilation openings in underground engineering construction according to claim 1, characterized in that: A wind turbine (16) is provided on the top of the top cover (5), and one end of the wind turbine (16) passes through the top cover (5) and is connected to the top of the circular plate (9).

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